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Commit | Line | Data |
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95732b49 JA |
1 | /* subst.c -- The part of the shell that does parameter, command, arithmetic, |
2 | and globbing substitutions. */ | |
726f6388 | 3 | |
bb70624e JA |
4 | /* ``Have a little faith, there's magic in the night. You ain't a |
5 | beauty, but, hey, you're alright.'' */ | |
6 | ||
ac50fbac | 7 | /* Copyright (C) 1987-2013 Free Software Foundation, Inc. |
726f6388 JA |
8 | |
9 | This file is part of GNU Bash, the Bourne Again SHell. | |
10 | ||
3185942a JA |
11 | Bash is free software: you can redistribute it and/or modify |
12 | it under the terms of the GNU General Public License as published by | |
13 | the Free Software Foundation, either version 3 of the License, or | |
14 | (at your option) any later version. | |
726f6388 | 15 | |
3185942a JA |
16 | Bash is distributed in the hope that it will be useful, |
17 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
19 | GNU General Public License for more details. | |
726f6388 | 20 | |
3185942a JA |
21 | You should have received a copy of the GNU General Public License |
22 | along with Bash. If not, see <http://www.gnu.org/licenses/>. | |
23 | */ | |
726f6388 | 24 | |
ccc6cda3 JA |
25 | #include "config.h" |
26 | ||
726f6388 JA |
27 | #include "bashtypes.h" |
28 | #include <stdio.h> | |
f73dda09 | 29 | #include "chartypes.h" |
3185942a JA |
30 | #if defined (HAVE_PWD_H) |
31 | # include <pwd.h> | |
32 | #endif | |
726f6388 JA |
33 | #include <signal.h> |
34 | #include <errno.h> | |
ccc6cda3 JA |
35 | |
36 | #if defined (HAVE_UNISTD_H) | |
37 | # include <unistd.h> | |
38 | #endif | |
726f6388 JA |
39 | |
40 | #include "bashansi.h" | |
41 | #include "posixstat.h" | |
b80f6443 | 42 | #include "bashintl.h" |
726f6388 JA |
43 | |
44 | #include "shell.h" | |
495aee44 | 45 | #include "parser.h" |
726f6388 JA |
46 | #include "flags.h" |
47 | #include "jobs.h" | |
48 | #include "execute_cmd.h" | |
49 | #include "filecntl.h" | |
ccc6cda3 JA |
50 | #include "trap.h" |
51 | #include "pathexp.h" | |
52 | #include "mailcheck.h" | |
53 | ||
7117c2d2 | 54 | #include "shmbutil.h" |
495aee44 | 55 | #include "typemax.h" |
7117c2d2 | 56 | |
ccc6cda3 JA |
57 | #include "builtins/getopt.h" |
58 | #include "builtins/common.h" | |
726f6388 | 59 | |
3185942a JA |
60 | #include "builtins/builtext.h" |
61 | ||
cce855bc | 62 | #include <tilde/tilde.h> |
f73dda09 | 63 | #include <glob/strmatch.h> |
ccc6cda3 JA |
64 | |
65 | #if !defined (errno) | |
66 | extern int errno; | |
67 | #endif /* !errno */ | |
726f6388 JA |
68 | |
69 | /* The size that strings change by. */ | |
d166f048 | 70 | #define DEFAULT_INITIAL_ARRAY_SIZE 112 |
ccc6cda3 JA |
71 | #define DEFAULT_ARRAY_SIZE 128 |
72 | ||
73 | /* Variable types. */ | |
74 | #define VT_VARIABLE 0 | |
75 | #define VT_POSPARMS 1 | |
76 | #define VT_ARRAYVAR 2 | |
d166f048 | 77 | #define VT_ARRAYMEMBER 3 |
3185942a | 78 | #define VT_ASSOCVAR 4 |
726f6388 | 79 | |
b80f6443 JA |
80 | #define VT_STARSUB 128 /* $* or ${array[*]} -- used to split */ |
81 | ||
ccc6cda3 JA |
82 | /* Flags for quoted_strchr */ |
83 | #define ST_BACKSL 0x01 | |
84 | #define ST_CTLESC 0x02 | |
7117c2d2 JA |
85 | #define ST_SQUOTE 0x04 /* unused yet */ |
86 | #define ST_DQUOTE 0x08 /* unused yet */ | |
87 | ||
b80f6443 JA |
88 | /* Flags for the `pflags' argument to param_expand() */ |
89 | #define PF_NOCOMSUB 0x01 /* Do not perform command substitution */ | |
89a92869 | 90 | #define PF_IGNUNBOUND 0x02 /* ignore unbound vars even if -u set */ |
0001803f | 91 | #define PF_NOSPLIT2 0x04 /* same as W_NOSPLIT2 */ |
ac50fbac | 92 | #define PF_ASSIGNRHS 0x08 /* same as W_ASSIGNRHS */ |
b80f6443 | 93 | |
cce855bc JA |
94 | /* These defs make it easier to use the editor. */ |
95 | #define LBRACE '{' | |
96 | #define RBRACE '}' | |
97 | #define LPAREN '(' | |
98 | #define RPAREN ')' | |
ac50fbac CR |
99 | #define LBRACK '[' |
100 | #define RBRACK ']' | |
726f6388 | 101 | |
0001803f CR |
102 | #if defined (HANDLE_MULTIBYTE) |
103 | #define WLPAREN L'(' | |
104 | #define WRPAREN L')' | |
105 | #endif | |
106 | ||
28ef6c31 JA |
107 | /* Evaluates to 1 if C is one of the shell's special parameters whose length |
108 | can be taken, but is also one of the special expansion characters. */ | |
109 | #define VALID_SPECIAL_LENGTH_PARAM(c) \ | |
110 | ((c) == '-' || (c) == '?' || (c) == '#') | |
111 | ||
112 | /* Evaluates to 1 if C is one of the shell's special parameters for which an | |
113 | indirect variable reference may be made. */ | |
114 | #define VALID_INDIR_PARAM(c) \ | |
495aee44 | 115 | ((posixly_correct == 0 && (c) == '#') || (posixly_correct == 0 && (c) == '?') || (c) == '@' || (c) == '*') |
28ef6c31 JA |
116 | |
117 | /* Evaluates to 1 if C is one of the OP characters that follows the parameter | |
118 | in ${parameter[:]OPword}. */ | |
7117c2d2 | 119 | #define VALID_PARAM_EXPAND_CHAR(c) (sh_syntaxtab[(unsigned char)c] & CSUBSTOP) |
28ef6c31 | 120 | |
bb70624e JA |
121 | /* Evaluates to 1 if this is one of the shell's special variables. */ |
122 | #define SPECIAL_VAR(name, wi) \ | |
f73dda09 JA |
123 | ((DIGIT (*name) && all_digits (name)) || \ |
124 | (name[1] == '\0' && (sh_syntaxtab[(unsigned char)*name] & CSPECVAR)) || \ | |
28ef6c31 | 125 | (wi && name[2] == '\0' && VALID_INDIR_PARAM (name[1]))) |
bb70624e | 126 | |
f73dda09 JA |
127 | /* An expansion function that takes a string and a quoted flag and returns |
128 | a WORD_LIST *. Used as the type of the third argument to | |
129 | expand_string_if_necessary(). */ | |
130 | typedef WORD_LIST *EXPFUNC __P((char *, int)); | |
131 | ||
726f6388 JA |
132 | /* Process ID of the last command executed within command substitution. */ |
133 | pid_t last_command_subst_pid = NO_PID; | |
b72432fd | 134 | pid_t current_command_subst_pid = NO_PID; |
726f6388 | 135 | |
7117c2d2 JA |
136 | /* Variables used to keep track of the characters in IFS. */ |
137 | SHELL_VAR *ifs_var; | |
138 | char *ifs_value; | |
139 | unsigned char ifs_cmap[UCHAR_MAX + 1]; | |
ac50fbac | 140 | int ifs_is_set, ifs_is_null; |
95732b49 JA |
141 | |
142 | #if defined (HANDLE_MULTIBYTE) | |
143 | unsigned char ifs_firstc[MB_LEN_MAX]; | |
144 | size_t ifs_firstc_len; | |
145 | #else | |
7117c2d2 | 146 | unsigned char ifs_firstc; |
95732b49 | 147 | #endif |
7117c2d2 | 148 | |
0001803f CR |
149 | /* Sentinel to tell when we are performing variable assignments preceding a |
150 | command name and putting them into the environment. Used to make sure | |
151 | we use the temporary environment when looking up variable values. */ | |
3185942a JA |
152 | int assigning_in_environment; |
153 | ||
0001803f CR |
154 | /* Used to hold a list of variable assignments preceding a command. Global |
155 | so the SIGCHLD handler in jobs.c can unwind-protect it when it runs a | |
156 | SIGCHLD trap and so it can be saved and restored by the trap handlers. */ | |
157 | WORD_LIST *subst_assign_varlist = (WORD_LIST *)NULL; | |
158 | ||
726f6388 | 159 | /* Extern functions and variables from different files. */ |
b80f6443 | 160 | extern int last_command_exit_value, last_command_exit_signal; |
0001803f CR |
161 | extern int subshell_environment, line_number; |
162 | extern int subshell_level, parse_and_execute_level, sourcelevel; | |
7117c2d2 | 163 | extern int eof_encountered; |
bb70624e | 164 | extern int return_catch_flag, return_catch_value; |
f73dda09 | 165 | extern pid_t dollar_dollar_pid; |
726f6388 | 166 | extern int posixly_correct; |
726f6388 | 167 | extern char *this_command_name; |
ccc6cda3 | 168 | extern struct fd_bitmap *current_fds_to_close; |
cce855bc | 169 | extern int wordexp_only; |
b80f6443 JA |
170 | extern int expanding_redir; |
171 | extern int tempenv_assign_error; | |
ac50fbac | 172 | extern int builtin_ignoring_errexit; |
726f6388 | 173 | |
0628567a JA |
174 | #if !defined (HAVE_WCSDUP) && defined (HANDLE_MULTIBYTE) |
175 | extern wchar_t *wcsdup __P((const wchar_t *)); | |
176 | #endif | |
177 | ||
ccc6cda3 JA |
178 | /* Non-zero means to allow unmatched globbed filenames to expand to |
179 | a null file. */ | |
180 | int allow_null_glob_expansion; | |
181 | ||
b80f6443 JA |
182 | /* Non-zero means to throw an error when globbing fails to match anything. */ |
183 | int fail_glob_expansion; | |
184 | ||
f73dda09 | 185 | #if 0 |
ccc6cda3 JA |
186 | /* Variables to keep track of which words in an expanded word list (the |
187 | output of expand_word_list_internal) are the result of globbing | |
f73dda09 JA |
188 | expansions. GLOB_ARGV_FLAGS is used by execute_cmd.c. |
189 | (CURRENTLY UNUSED). */ | |
ccc6cda3 JA |
190 | char *glob_argv_flags; |
191 | static int glob_argv_flags_size; | |
f73dda09 | 192 | #endif |
726f6388 JA |
193 | |
194 | static WORD_LIST expand_word_error, expand_word_fatal; | |
95732b49 | 195 | static WORD_DESC expand_wdesc_error, expand_wdesc_fatal; |
726f6388 | 196 | static char expand_param_error, expand_param_fatal; |
95732b49 | 197 | static char extract_string_error, extract_string_fatal; |
726f6388 | 198 | |
28ef6c31 JA |
199 | /* Tell the expansion functions to not longjmp back to top_level on fatal |
200 | errors. Enabled when doing completion and prompt string expansion. */ | |
201 | static int no_longjmp_on_fatal_error = 0; | |
202 | ||
203 | /* Set by expand_word_unsplit; used to inhibit splitting and re-joining | |
204 | $* on $IFS, primarily when doing assignment statements. */ | |
205 | static int expand_no_split_dollar_star = 0; | |
bb70624e | 206 | |
bb70624e JA |
207 | /* A WORD_LIST of words to be expanded by expand_word_list_internal, |
208 | without any leading variable assignments. */ | |
209 | static WORD_LIST *garglist = (WORD_LIST *)NULL; | |
b72432fd | 210 | |
f73dda09 | 211 | static char *quoted_substring __P((char *, int, int)); |
7117c2d2 JA |
212 | static int quoted_strlen __P((char *)); |
213 | static char *quoted_strchr __P((char *, int, int)); | |
f73dda09 JA |
214 | |
215 | static char *expand_string_if_necessary __P((char *, int, EXPFUNC *)); | |
216 | static inline char *expand_string_to_string_internal __P((char *, int, EXPFUNC *)); | |
217 | static WORD_LIST *call_expand_word_internal __P((WORD_DESC *, int, int, int *, int *)); | |
218 | static WORD_LIST *expand_string_internal __P((char *, int)); | |
219 | static WORD_LIST *expand_string_leave_quoted __P((char *, int)); | |
220 | static WORD_LIST *expand_string_for_rhs __P((char *, int, int *, int *)); | |
221 | ||
f73dda09 | 222 | static WORD_LIST *list_quote_escapes __P((WORD_LIST *)); |
ac50fbac CR |
223 | static WORD_LIST *list_dequote_escapes __P((WORD_LIST *)); |
224 | ||
f73dda09 JA |
225 | static char *make_quoted_char __P((int)); |
226 | static WORD_LIST *quote_list __P((WORD_LIST *)); | |
f73dda09 JA |
227 | |
228 | static int unquoted_substring __P((char *, char *)); | |
229 | static int unquoted_member __P((int, char *)); | |
230 | ||
95732b49 JA |
231 | #if defined (ARRAY_VARS) |
232 | static SHELL_VAR *do_compound_assignment __P((char *, char *, int)); | |
233 | #endif | |
234 | static int do_assignment_internal __P((const WORD_DESC *, int)); | |
f73dda09 | 235 | |
3185942a | 236 | static char *string_extract_verbatim __P((char *, size_t, int *, char *, int)); |
f73dda09 JA |
237 | static char *string_extract __P((char *, int *, char *, int)); |
238 | static char *string_extract_double_quoted __P((char *, int *, int)); | |
7117c2d2 | 239 | static inline char *string_extract_single_quoted __P((char *, int *)); |
0628567a | 240 | static inline int skip_single_quoted __P((const char *, size_t, int)); |
7117c2d2 JA |
241 | static int skip_double_quoted __P((char *, size_t, int)); |
242 | static char *extract_delimited_string __P((char *, int *, char *, char *, char *, int)); | |
243 | static char *extract_dollar_brace_string __P((char *, int *, int, int)); | |
89a92869 | 244 | static int skip_matched_pair __P((const char *, int, int, int, int)); |
f73dda09 | 245 | |
f73dda09 JA |
246 | static char *pos_params __P((char *, int, int, int)); |
247 | ||
b80f6443 JA |
248 | static unsigned char *mb_getcharlens __P((char *, int)); |
249 | ||
250 | static char *remove_upattern __P((char *, char *, int)); | |
0628567a | 251 | #if defined (HANDLE_MULTIBYTE) |
b80f6443 JA |
252 | static wchar_t *remove_wpattern __P((wchar_t *, size_t, wchar_t *, int)); |
253 | #endif | |
f73dda09 | 254 | static char *remove_pattern __P((char *, char *, int)); |
b80f6443 | 255 | |
b80f6443 JA |
256 | static int match_upattern __P((char *, char *, int, char **, char **)); |
257 | #if defined (HANDLE_MULTIBYTE) | |
b80f6443 JA |
258 | static int match_wpattern __P((wchar_t *, char **, size_t, wchar_t *, int, char **, char **)); |
259 | #endif | |
f73dda09 JA |
260 | static int match_pattern __P((char *, char *, int, char **, char **)); |
261 | static int getpatspec __P((int, char *)); | |
262 | static char *getpattern __P((char *, int, int)); | |
7117c2d2 | 263 | static char *variable_remove_pattern __P((char *, char *, int, int)); |
f73dda09 | 264 | static char *list_remove_pattern __P((WORD_LIST *, char *, int, int, int)); |
7117c2d2 | 265 | static char *parameter_list_remove_pattern __P((int, char *, int, int)); |
f73dda09 | 266 | #ifdef ARRAY_VARS |
3185942a | 267 | static char *array_remove_pattern __P((SHELL_VAR *, char *, int, char *, int)); |
f73dda09 | 268 | #endif |
495aee44 | 269 | static char *parameter_brace_remove_pattern __P((char *, char *, int, char *, int, int, int)); |
f73dda09 JA |
270 | |
271 | static char *process_substitute __P((char *, int)); | |
272 | ||
3185942a | 273 | static char *read_comsub __P((int, int, int *)); |
f73dda09 JA |
274 | |
275 | #ifdef ARRAY_VARS | |
276 | static arrayind_t array_length_reference __P((char *)); | |
277 | #endif | |
278 | ||
279 | static int valid_brace_expansion_word __P((char *, int)); | |
b80f6443 | 280 | static int chk_atstar __P((char *, int, int *, int *)); |
0628567a | 281 | static int chk_arithsub __P((const char *, int)); |
b80f6443 | 282 | |
495aee44 | 283 | static WORD_DESC *parameter_brace_expand_word __P((char *, int, int, int, arrayind_t *)); |
ac50fbac | 284 | static char *parameter_brace_find_indir __P((char *, int, int, int)); |
95732b49 JA |
285 | static WORD_DESC *parameter_brace_expand_indir __P((char *, int, int, int *, int *)); |
286 | static WORD_DESC *parameter_brace_expand_rhs __P((char *, char *, int, int, int *, int *)); | |
f73dda09 JA |
287 | static void parameter_brace_expand_error __P((char *, char *)); |
288 | ||
289 | static int valid_length_expression __P((char *)); | |
7117c2d2 | 290 | static intmax_t parameter_brace_expand_length __P((char *)); |
f73dda09 JA |
291 | |
292 | static char *skiparith __P((char *, int)); | |
3185942a | 293 | static int verify_substring_values __P((SHELL_VAR *, char *, char *, int, intmax_t *, intmax_t *)); |
495aee44 | 294 | static int get_var_and_type __P((char *, char *, arrayind_t, int, int, SHELL_VAR **, char **)); |
b80f6443 | 295 | static char *mb_substring __P((char *, int, int)); |
495aee44 CR |
296 | static char *parameter_brace_substring __P((char *, char *, int, char *, int, int)); |
297 | ||
298 | static int shouldexp_replacement __P((char *)); | |
f73dda09 JA |
299 | |
300 | static char *pos_params_pat_subst __P((char *, char *, char *, int)); | |
301 | ||
495aee44 | 302 | static char *parameter_brace_patsub __P((char *, char *, int, char *, int, int)); |
f73dda09 | 303 | |
3185942a | 304 | static char *pos_params_casemod __P((char *, char *, int, int)); |
495aee44 | 305 | static char *parameter_brace_casemod __P((char *, char *, int, int, char *, int, int)); |
3185942a | 306 | |
0001803f | 307 | static WORD_DESC *parameter_brace_expand __P((char *, int *, int, int, int *, int *)); |
95732b49 | 308 | static WORD_DESC *param_expand __P((char *, int *, int, int *, int *, int *, int *, int)); |
f73dda09 JA |
309 | |
310 | static WORD_LIST *expand_word_internal __P((WORD_DESC *, int, int, int *, int *)); | |
311 | ||
f73dda09 JA |
312 | static WORD_LIST *word_list_split __P((WORD_LIST *)); |
313 | ||
b80f6443 JA |
314 | static void exp_jump_to_top_level __P((int)); |
315 | ||
f73dda09 JA |
316 | static WORD_LIST *separate_out_assignments __P((WORD_LIST *)); |
317 | static WORD_LIST *glob_expand_word_list __P((WORD_LIST *, int)); | |
318 | #ifdef BRACE_EXPANSION | |
319 | static WORD_LIST *brace_expand_word_list __P((WORD_LIST *, int)); | |
320 | #endif | |
3185942a JA |
321 | #if defined (ARRAY_VARS) |
322 | static int make_internal_declare __P((char *, char *)); | |
323 | #endif | |
f73dda09 JA |
324 | static WORD_LIST *shell_expand_word_list __P((WORD_LIST *, int)); |
325 | static WORD_LIST *expand_word_list_internal __P((WORD_LIST *, int)); | |
726f6388 JA |
326 | |
327 | /* **************************************************************** */ | |
328 | /* */ | |
329 | /* Utility Functions */ | |
330 | /* */ | |
331 | /* **************************************************************** */ | |
332 | ||
0001803f CR |
333 | #if defined (DEBUG) |
334 | void | |
335 | dump_word_flags (flags) | |
336 | int flags; | |
337 | { | |
338 | int f; | |
339 | ||
340 | f = flags; | |
341 | fprintf (stderr, "%d -> ", f); | |
342 | if (f & W_ASSIGNASSOC) | |
343 | { | |
344 | f &= ~W_ASSIGNASSOC; | |
345 | fprintf (stderr, "W_ASSIGNASSOC%s", f ? "|" : ""); | |
346 | } | |
ac50fbac CR |
347 | if (f & W_ASSIGNARRAY) |
348 | { | |
349 | f &= ~W_ASSIGNARRAY; | |
350 | fprintf (stderr, "W_ASSIGNARRAY%s", f ? "|" : ""); | |
351 | } | |
0001803f CR |
352 | if (f & W_HASCTLESC) |
353 | { | |
354 | f &= ~W_HASCTLESC; | |
355 | fprintf (stderr, "W_HASCTLESC%s", f ? "|" : ""); | |
356 | } | |
357 | if (f & W_NOPROCSUB) | |
358 | { | |
359 | f &= ~W_NOPROCSUB; | |
360 | fprintf (stderr, "W_NOPROCSUB%s", f ? "|" : ""); | |
361 | } | |
362 | if (f & W_DQUOTE) | |
363 | { | |
364 | f &= ~W_DQUOTE; | |
365 | fprintf (stderr, "W_DQUOTE%s", f ? "|" : ""); | |
366 | } | |
367 | if (f & W_HASQUOTEDNULL) | |
368 | { | |
369 | f &= ~W_HASQUOTEDNULL; | |
370 | fprintf (stderr, "W_HASQUOTEDNULL%s", f ? "|" : ""); | |
371 | } | |
372 | if (f & W_ASSIGNARG) | |
373 | { | |
374 | f &= ~W_ASSIGNARG; | |
375 | fprintf (stderr, "W_ASSIGNARG%s", f ? "|" : ""); | |
376 | } | |
377 | if (f & W_ASSNBLTIN) | |
378 | { | |
379 | f &= ~W_ASSNBLTIN; | |
380 | fprintf (stderr, "W_ASSNBLTIN%s", f ? "|" : ""); | |
381 | } | |
6d41b715 CR |
382 | if (f & W_ASSNGLOBAL) |
383 | { | |
384 | f &= ~W_ASSNGLOBAL; | |
385 | fprintf (stderr, "W_ASSNGLOBAL%s", f ? "|" : ""); | |
386 | } | |
ac50fbac CR |
387 | if (f & W_ASSIGNINT) |
388 | { | |
389 | f &= ~W_ASSIGNINT; | |
390 | fprintf (stderr, "W_ASSIGNINT%s", f ? "|" : ""); | |
391 | } | |
0001803f CR |
392 | if (f & W_COMPASSIGN) |
393 | { | |
394 | f &= ~W_COMPASSIGN; | |
395 | fprintf (stderr, "W_COMPASSIGN%s", f ? "|" : ""); | |
396 | } | |
397 | if (f & W_NOEXPAND) | |
398 | { | |
399 | f &= ~W_NOEXPAND; | |
400 | fprintf (stderr, "W_NOEXPAND%s", f ? "|" : ""); | |
401 | } | |
402 | if (f & W_ITILDE) | |
403 | { | |
404 | f &= ~W_ITILDE; | |
405 | fprintf (stderr, "W_ITILDE%s", f ? "|" : ""); | |
406 | } | |
407 | if (f & W_NOTILDE) | |
408 | { | |
409 | f &= ~W_NOTILDE; | |
410 | fprintf (stderr, "W_NOTILDE%s", f ? "|" : ""); | |
411 | } | |
412 | if (f & W_ASSIGNRHS) | |
413 | { | |
414 | f &= ~W_ASSIGNRHS; | |
415 | fprintf (stderr, "W_ASSIGNRHS%s", f ? "|" : ""); | |
416 | } | |
417 | if (f & W_NOCOMSUB) | |
418 | { | |
419 | f &= ~W_NOCOMSUB; | |
420 | fprintf (stderr, "W_NOCOMSUB%s", f ? "|" : ""); | |
421 | } | |
422 | if (f & W_DOLLARSTAR) | |
423 | { | |
424 | f &= ~W_DOLLARSTAR; | |
425 | fprintf (stderr, "W_DOLLARSTAR%s", f ? "|" : ""); | |
426 | } | |
427 | if (f & W_DOLLARAT) | |
428 | { | |
429 | f &= ~W_DOLLARAT; | |
430 | fprintf (stderr, "W_DOLLARAT%s", f ? "|" : ""); | |
431 | } | |
432 | if (f & W_TILDEEXP) | |
433 | { | |
434 | f &= ~W_TILDEEXP; | |
435 | fprintf (stderr, "W_TILDEEXP%s", f ? "|" : ""); | |
436 | } | |
437 | if (f & W_NOSPLIT2) | |
438 | { | |
439 | f &= ~W_NOSPLIT2; | |
440 | fprintf (stderr, "W_NOSPLIT2%s", f ? "|" : ""); | |
441 | } | |
0001803f CR |
442 | if (f & W_NOSPLIT) |
443 | { | |
444 | f &= ~W_NOSPLIT; | |
445 | fprintf (stderr, "W_NOSPLIT%s", f ? "|" : ""); | |
446 | } | |
ac50fbac | 447 | if (f & W_NOBRACE) |
0001803f | 448 | { |
ac50fbac CR |
449 | f &= ~W_NOBRACE; |
450 | fprintf (stderr, "W_NOBRACE%s", f ? "|" : ""); | |
451 | } | |
452 | if (f & W_NOGLOB) | |
453 | { | |
454 | f &= ~W_NOGLOB; | |
455 | fprintf (stderr, "W_NOGLOB%s", f ? "|" : ""); | |
456 | } | |
457 | if (f & W_SPLITSPACE) | |
458 | { | |
459 | f &= ~W_SPLITSPACE; | |
460 | fprintf (stderr, "W_SPLITSPACE%s", f ? "|" : ""); | |
0001803f CR |
461 | } |
462 | if (f & W_ASSIGNMENT) | |
463 | { | |
464 | f &= ~W_ASSIGNMENT; | |
465 | fprintf (stderr, "W_ASSIGNMENT%s", f ? "|" : ""); | |
466 | } | |
467 | if (f & W_QUOTED) | |
468 | { | |
469 | f &= ~W_QUOTED; | |
470 | fprintf (stderr, "W_QUOTED%s", f ? "|" : ""); | |
471 | } | |
472 | if (f & W_HASDOLLAR) | |
473 | { | |
474 | f &= ~W_HASDOLLAR; | |
475 | fprintf (stderr, "W_HASDOLLAR%s", f ? "|" : ""); | |
476 | } | |
477 | fprintf (stderr, "\n"); | |
478 | fflush (stderr); | |
479 | } | |
480 | #endif | |
481 | ||
7117c2d2 | 482 | #ifdef INCLUDE_UNUSED |
ccc6cda3 JA |
483 | static char * |
484 | quoted_substring (string, start, end) | |
485 | char *string; | |
486 | int start, end; | |
487 | { | |
488 | register int len, l; | |
489 | register char *result, *s, *r; | |
490 | ||
491 | len = end - start; | |
492 | ||
493 | /* Move to string[start], skipping quoted characters. */ | |
494 | for (s = string, l = 0; *s && l < start; ) | |
495 | { | |
496 | if (*s == CTLESC) | |
497 | { | |
28ef6c31 JA |
498 | s++; |
499 | continue; | |
ccc6cda3 JA |
500 | } |
501 | l++; | |
502 | if (*s == 0) | |
28ef6c31 | 503 | break; |
ccc6cda3 JA |
504 | } |
505 | ||
f73dda09 | 506 | r = result = (char *)xmalloc (2*len + 1); /* save room for quotes */ |
ccc6cda3 JA |
507 | |
508 | /* Copy LEN characters, including quote characters. */ | |
509 | s = string + l; | |
510 | for (l = 0; l < len; s++) | |
511 | { | |
512 | if (*s == CTLESC) | |
28ef6c31 | 513 | *r++ = *s++; |
ccc6cda3 JA |
514 | *r++ = *s; |
515 | l++; | |
516 | if (*s == 0) | |
28ef6c31 | 517 | break; |
ccc6cda3 JA |
518 | } |
519 | *r = '\0'; | |
520 | return result; | |
521 | } | |
7117c2d2 JA |
522 | #endif |
523 | ||
524 | #ifdef INCLUDE_UNUSED | |
525 | /* Return the length of S, skipping over quoted characters */ | |
526 | static int | |
527 | quoted_strlen (s) | |
528 | char *s; | |
529 | { | |
530 | register char *p; | |
531 | int i; | |
532 | ||
533 | i = 0; | |
534 | for (p = s; *p; p++) | |
535 | { | |
536 | if (*p == CTLESC) | |
537 | { | |
538 | p++; | |
539 | if (*p == 0) | |
540 | return (i + 1); | |
541 | } | |
542 | i++; | |
543 | } | |
544 | ||
545 | return i; | |
546 | } | |
547 | #endif | |
ccc6cda3 JA |
548 | |
549 | /* Find the first occurrence of character C in string S, obeying shell | |
550 | quoting rules. If (FLAGS & ST_BACKSL) is non-zero, backslash-escaped | |
551 | characters are skipped. If (FLAGS & ST_CTLESC) is non-zero, characters | |
552 | escaped with CTLESC are skipped. */ | |
7117c2d2 | 553 | static char * |
ccc6cda3 JA |
554 | quoted_strchr (s, c, flags) |
555 | char *s; | |
556 | int c, flags; | |
557 | { | |
558 | register char *p; | |
559 | ||
560 | for (p = s; *p; p++) | |
561 | { | |
562 | if (((flags & ST_BACKSL) && *p == '\\') | |
563 | || ((flags & ST_CTLESC) && *p == CTLESC)) | |
564 | { | |
565 | p++; | |
566 | if (*p == '\0') | |
567 | return ((char *)NULL); | |
568 | continue; | |
569 | } | |
570 | else if (*p == c) | |
571 | return p; | |
572 | } | |
573 | return ((char *)NULL); | |
574 | } | |
575 | ||
cce855bc | 576 | /* Return 1 if CHARACTER appears in an unquoted portion of |
7117c2d2 | 577 | STRING. Return 0 otherwise. CHARACTER must be a single-byte character. */ |
cce855bc JA |
578 | static int |
579 | unquoted_member (character, string) | |
580 | int character; | |
726f6388 JA |
581 | char *string; |
582 | { | |
7117c2d2 | 583 | size_t slen; |
cce855bc | 584 | int sindex, c; |
7117c2d2 | 585 | DECLARE_MBSTATE; |
726f6388 | 586 | |
7117c2d2 JA |
587 | slen = strlen (string); |
588 | sindex = 0; | |
589 | while (c = string[sindex]) | |
726f6388 | 590 | { |
cce855bc JA |
591 | if (c == character) |
592 | return (1); | |
593 | ||
594 | switch (c) | |
ccc6cda3 | 595 | { |
cce855bc | 596 | default: |
7117c2d2 | 597 | ADVANCE_CHAR (string, slen, sindex); |
cce855bc JA |
598 | break; |
599 | ||
600 | case '\\': | |
601 | sindex++; | |
602 | if (string[sindex]) | |
7117c2d2 | 603 | ADVANCE_CHAR (string, slen, sindex); |
cce855bc JA |
604 | break; |
605 | ||
606 | case '\'': | |
7117c2d2 | 607 | sindex = skip_single_quoted (string, slen, ++sindex); |
cce855bc JA |
608 | break; |
609 | ||
610 | case '"': | |
7117c2d2 | 611 | sindex = skip_double_quoted (string, slen, ++sindex); |
cce855bc | 612 | break; |
ccc6cda3 | 613 | } |
726f6388 | 614 | } |
cce855bc | 615 | return (0); |
726f6388 JA |
616 | } |
617 | ||
cce855bc JA |
618 | /* Return 1 if SUBSTR appears in an unquoted portion of STRING. */ |
619 | static int | |
620 | unquoted_substring (substr, string) | |
621 | char *substr, *string; | |
726f6388 | 622 | { |
7117c2d2 | 623 | size_t slen; |
cce855bc | 624 | int sindex, c, sublen; |
7117c2d2 | 625 | DECLARE_MBSTATE; |
726f6388 | 626 | |
cce855bc JA |
627 | if (substr == 0 || *substr == '\0') |
628 | return (0); | |
629 | ||
7117c2d2 | 630 | slen = strlen (string); |
cce855bc JA |
631 | sublen = strlen (substr); |
632 | for (sindex = 0; c = string[sindex]; ) | |
726f6388 | 633 | { |
cce855bc JA |
634 | if (STREQN (string + sindex, substr, sublen)) |
635 | return (1); | |
636 | ||
637 | switch (c) | |
638 | { | |
639 | case '\\': | |
640 | sindex++; | |
cce855bc | 641 | if (string[sindex]) |
7117c2d2 | 642 | ADVANCE_CHAR (string, slen, sindex); |
cce855bc JA |
643 | break; |
644 | ||
645 | case '\'': | |
7117c2d2 | 646 | sindex = skip_single_quoted (string, slen, ++sindex); |
cce855bc JA |
647 | break; |
648 | ||
649 | case '"': | |
7117c2d2 | 650 | sindex = skip_double_quoted (string, slen, ++sindex); |
cce855bc JA |
651 | break; |
652 | ||
653 | default: | |
7117c2d2 | 654 | ADVANCE_CHAR (string, slen, sindex); |
cce855bc JA |
655 | break; |
656 | } | |
726f6388 | 657 | } |
cce855bc | 658 | return (0); |
ccc6cda3 | 659 | } |
726f6388 | 660 | |
cce855bc JA |
661 | /* Most of the substitutions must be done in parallel. In order |
662 | to avoid using tons of unclear goto's, I have some functions | |
663 | for manipulating malloc'ed strings. They all take INDX, a | |
664 | pointer to an integer which is the offset into the string | |
665 | where manipulation is taking place. They also take SIZE, a | |
666 | pointer to an integer which is the current length of the | |
667 | character array for this string. */ | |
726f6388 | 668 | |
cce855bc JA |
669 | /* Append SOURCE to TARGET at INDEX. SIZE is the current amount |
670 | of space allocated to TARGET. SOURCE can be NULL, in which | |
671 | case nothing happens. Gets rid of SOURCE by freeing it. | |
672 | Returns TARGET in case the location has changed. */ | |
7117c2d2 | 673 | INLINE char * |
cce855bc JA |
674 | sub_append_string (source, target, indx, size) |
675 | char *source, *target; | |
676 | int *indx, *size; | |
677 | { | |
678 | if (source) | |
726f6388 | 679 | { |
cce855bc JA |
680 | int srclen, n; |
681 | ||
682 | srclen = STRLEN (source); | |
683 | if (srclen >= (int)(*size - *indx)) | |
726f6388 | 684 | { |
cce855bc JA |
685 | n = srclen + *indx; |
686 | n = (n + DEFAULT_ARRAY_SIZE) - (n % DEFAULT_ARRAY_SIZE); | |
f73dda09 | 687 | target = (char *)xrealloc (target, (*size = n)); |
726f6388 | 688 | } |
cce855bc JA |
689 | |
690 | FASTCOPY (source, target + *indx, srclen); | |
691 | *indx += srclen; | |
692 | target[*indx] = '\0'; | |
693 | ||
694 | free (source); | |
726f6388 | 695 | } |
cce855bc JA |
696 | return (target); |
697 | } | |
698 | ||
699 | #if 0 | |
700 | /* UNUSED */ | |
701 | /* Append the textual representation of NUMBER to TARGET. | |
702 | INDX and SIZE are as in SUB_APPEND_STRING. */ | |
703 | char * | |
704 | sub_append_number (number, target, indx, size) | |
7117c2d2 | 705 | intmax_t number; |
f73dda09 | 706 | int *indx, *size; |
cce855bc JA |
707 | char *target; |
708 | { | |
709 | char *temp; | |
710 | ||
711 | temp = itos (number); | |
712 | return (sub_append_string (temp, target, indx, size)); | |
726f6388 | 713 | } |
d166f048 | 714 | #endif |
726f6388 JA |
715 | |
716 | /* Extract a substring from STRING, starting at SINDEX and ending with | |
717 | one of the characters in CHARLIST. Don't make the ending character | |
718 | part of the string. Leave SINDEX pointing at the ending character. | |
3185942a | 719 | Understand about backslashes in the string. If (flags & SX_VARNAME) |
7117c2d2 JA |
720 | is non-zero, and array variables have been compiled into the shell, |
721 | everything between a `[' and a corresponding `]' is skipped over. | |
3185942a JA |
722 | If (flags & SX_NOALLOC) is non-zero, don't return the substring, just |
723 | update SINDEX. If (flags & SX_REQMATCH) is non-zero, the string must | |
95732b49 | 724 | contain a closing character from CHARLIST. */ |
726f6388 | 725 | static char * |
7117c2d2 | 726 | string_extract (string, sindex, charlist, flags) |
f73dda09 JA |
727 | char *string; |
728 | int *sindex; | |
729 | char *charlist; | |
7117c2d2 | 730 | int flags; |
726f6388 | 731 | { |
ccc6cda3 | 732 | register int c, i; |
95732b49 | 733 | int found; |
7117c2d2 | 734 | size_t slen; |
726f6388 | 735 | char *temp; |
7117c2d2 | 736 | DECLARE_MBSTATE; |
726f6388 | 737 | |
95732b49 | 738 | slen = (MB_CUR_MAX > 1) ? strlen (string + *sindex) + *sindex : 0; |
7117c2d2 | 739 | i = *sindex; |
95732b49 | 740 | found = 0; |
7117c2d2 | 741 | while (c = string[i]) |
726f6388 JA |
742 | { |
743 | if (c == '\\') | |
7117c2d2 JA |
744 | { |
745 | if (string[i + 1]) | |
746 | i++; | |
747 | else | |
748 | break; | |
749 | } | |
ccc6cda3 | 750 | #if defined (ARRAY_VARS) |
3185942a | 751 | else if ((flags & SX_VARNAME) && c == '[') |
ccc6cda3 JA |
752 | { |
753 | int ni; | |
754 | /* If this is an array subscript, skip over it and continue. */ | |
0001803f | 755 | ni = skipsubscript (string, i, 0); |
ccc6cda3 JA |
756 | if (string[ni] == ']') |
757 | i = ni; | |
758 | } | |
759 | #endif | |
760 | else if (MEMBER (c, charlist)) | |
95732b49 JA |
761 | { |
762 | found = 1; | |
726f6388 | 763 | break; |
95732b49 | 764 | } |
7117c2d2 JA |
765 | |
766 | ADVANCE_CHAR (string, slen, i); | |
726f6388 | 767 | } |
bb70624e | 768 | |
95732b49 JA |
769 | /* If we had to have a matching delimiter and didn't find one, return an |
770 | error and let the caller deal with it. */ | |
3185942a | 771 | if ((flags & SX_REQMATCH) && found == 0) |
95732b49 JA |
772 | { |
773 | *sindex = i; | |
774 | return (&extract_string_error); | |
775 | } | |
776 | ||
3185942a | 777 | temp = (flags & SX_NOALLOC) ? (char *)NULL : substring (string, *sindex, i); |
726f6388 | 778 | *sindex = i; |
95732b49 | 779 | |
726f6388 JA |
780 | return (temp); |
781 | } | |
782 | ||
ccc6cda3 JA |
783 | /* Extract the contents of STRING as if it is enclosed in double quotes. |
784 | SINDEX, when passed in, is the offset of the character immediately | |
785 | following the opening double quote; on exit, SINDEX is left pointing after | |
786 | the closing double quote. If STRIPDQ is non-zero, unquoted double | |
787 | quotes are stripped and the string is terminated by a null byte. | |
788 | Backslashes between the embedded double quotes are processed. If STRIPDQ | |
789 | is zero, an unquoted `"' terminates the string. */ | |
7117c2d2 | 790 | static char * |
ccc6cda3 | 791 | string_extract_double_quoted (string, sindex, stripdq) |
726f6388 | 792 | char *string; |
ccc6cda3 | 793 | int *sindex, stripdq; |
726f6388 | 794 | { |
7117c2d2 JA |
795 | size_t slen; |
796 | char *send; | |
f73dda09 JA |
797 | int j, i, t; |
798 | unsigned char c; | |
ccc6cda3 JA |
799 | char *temp, *ret; /* The new string we return. */ |
800 | int pass_next, backquote, si; /* State variables for the machine. */ | |
801 | int dquote; | |
7117c2d2 JA |
802 | DECLARE_MBSTATE; |
803 | ||
804 | slen = strlen (string + *sindex) + *sindex; | |
805 | send = string + slen; | |
726f6388 | 806 | |
ccc6cda3 | 807 | pass_next = backquote = dquote = 0; |
7117c2d2 | 808 | temp = (char *)xmalloc (1 + slen - *sindex); |
726f6388 | 809 | |
7117c2d2 JA |
810 | j = 0; |
811 | i = *sindex; | |
812 | while (c = string[i]) | |
726f6388 | 813 | { |
ccc6cda3 JA |
814 | /* Process a character that was quoted by a backslash. */ |
815 | if (pass_next) | |
726f6388 | 816 | { |
495aee44 | 817 | /* XXX - take another look at this in light of Interp 221 */ |
ccc6cda3 | 818 | /* Posix.2 sez: |
726f6388 | 819 | |
ccc6cda3 JA |
820 | ``The backslash shall retain its special meaning as an escape |
821 | character only when followed by one of the characters: | |
7117c2d2 | 822 | $ ` " \ <newline>''. |
726f6388 | 823 | |
ccc6cda3 JA |
824 | If STRIPDQ is zero, we handle the double quotes here and let |
825 | expand_word_internal handle the rest. If STRIPDQ is non-zero, | |
826 | we have already been through one round of backslash stripping, | |
827 | and want to strip these backslashes only if DQUOTE is non-zero, | |
828 | indicating that we are inside an embedded double-quoted string. */ | |
829 | ||
830 | /* If we are in an embedded quoted string, then don't strip | |
831 | backslashes before characters for which the backslash | |
832 | retains its special meaning, but remove backslashes in | |
833 | front of other characters. If we are not in an | |
834 | embedded quoted string, don't strip backslashes at all. | |
835 | This mess is necessary because the string was already | |
836 | surrounded by double quotes (and sh has some really weird | |
837 | quoting rules). | |
838 | The returned string will be run through expansion as if | |
839 | it were double-quoted. */ | |
840 | if ((stripdq == 0 && c != '"') || | |
28ef6c31 | 841 | (stripdq && ((dquote && (sh_syntaxtab[c] & CBSDQUOTE)) || dquote == 0))) |
ccc6cda3 | 842 | temp[j++] = '\\'; |
ccc6cda3 | 843 | pass_next = 0; |
7117c2d2 JA |
844 | |
845 | add_one_character: | |
846 | COPY_CHAR_I (temp, j, string, send, i); | |
ccc6cda3 JA |
847 | continue; |
848 | } | |
726f6388 | 849 | |
ccc6cda3 JA |
850 | /* A backslash protects the next character. The code just above |
851 | handles preserving the backslash in front of any character but | |
852 | a double quote. */ | |
853 | if (c == '\\') | |
726f6388 | 854 | { |
ccc6cda3 | 855 | pass_next++; |
7117c2d2 | 856 | i++; |
726f6388 JA |
857 | continue; |
858 | } | |
859 | ||
ccc6cda3 JA |
860 | /* Inside backquotes, ``the portion of the quoted string from the |
861 | initial backquote and the characters up to the next backquote | |
862 | that is not preceded by a backslash, having escape characters | |
863 | removed, defines that command''. */ | |
864 | if (backquote) | |
726f6388 | 865 | { |
ccc6cda3 JA |
866 | if (c == '`') |
867 | backquote = 0; | |
868 | temp[j++] = c; | |
7117c2d2 | 869 | i++; |
726f6388 JA |
870 | continue; |
871 | } | |
872 | ||
ccc6cda3 | 873 | if (c == '`') |
726f6388 | 874 | { |
ccc6cda3 JA |
875 | temp[j++] = c; |
876 | backquote++; | |
7117c2d2 | 877 | i++; |
ccc6cda3 | 878 | continue; |
726f6388 JA |
879 | } |
880 | ||
ccc6cda3 JA |
881 | /* Pass everything between `$(' and the matching `)' or a quoted |
882 | ${ ... } pair through according to the Posix.2 specification. */ | |
cce855bc | 883 | if (c == '$' && ((string[i + 1] == LPAREN) || (string[i + 1] == LBRACE))) |
726f6388 | 884 | { |
b80f6443 JA |
885 | int free_ret = 1; |
886 | ||
ccc6cda3 | 887 | si = i + 2; |
cce855bc | 888 | if (string[i + 1] == LPAREN) |
3185942a | 889 | ret = extract_command_subst (string, &si, 0); |
ccc6cda3 | 890 | else |
495aee44 | 891 | ret = extract_dollar_brace_string (string, &si, Q_DOUBLE_QUOTES, 0); |
726f6388 | 892 | |
ccc6cda3 JA |
893 | temp[j++] = '$'; |
894 | temp[j++] = string[i + 1]; | |
726f6388 | 895 | |
b80f6443 JA |
896 | /* Just paranoia; ret will not be 0 unless no_longjmp_on_fatal_error |
897 | is set. */ | |
898 | if (ret == 0 && no_longjmp_on_fatal_error) | |
899 | { | |
900 | free_ret = 0; | |
901 | ret = string + i + 2; | |
902 | } | |
903 | ||
ccc6cda3 JA |
904 | for (t = 0; ret[t]; t++, j++) |
905 | temp[j] = ret[t]; | |
b80f6443 | 906 | temp[j] = string[si]; |
726f6388 | 907 | |
b80f6443 JA |
908 | if (string[si]) |
909 | { | |
910 | j++; | |
911 | i = si + 1; | |
912 | } | |
913 | else | |
914 | i = si; | |
915 | ||
916 | if (free_ret) | |
917 | free (ret); | |
ccc6cda3 | 918 | continue; |
726f6388 JA |
919 | } |
920 | ||
ccc6cda3 | 921 | /* Add any character but a double quote to the quoted string we're |
28ef6c31 | 922 | accumulating. */ |
ccc6cda3 | 923 | if (c != '"') |
7117c2d2 | 924 | goto add_one_character; |
ccc6cda3 JA |
925 | |
926 | /* c == '"' */ | |
927 | if (stripdq) | |
726f6388 | 928 | { |
ccc6cda3 | 929 | dquote ^= 1; |
7117c2d2 | 930 | i++; |
ccc6cda3 | 931 | continue; |
726f6388 | 932 | } |
ccc6cda3 JA |
933 | |
934 | break; | |
726f6388 | 935 | } |
ccc6cda3 | 936 | temp[j] = '\0'; |
726f6388 | 937 | |
ccc6cda3 JA |
938 | /* Point to after the closing quote. */ |
939 | if (c) | |
940 | i++; | |
726f6388 JA |
941 | *sindex = i; |
942 | ||
ccc6cda3 JA |
943 | return (temp); |
944 | } | |
945 | ||
946 | /* This should really be another option to string_extract_double_quoted. */ | |
f73dda09 | 947 | static int |
7117c2d2 | 948 | skip_double_quoted (string, slen, sind) |
ccc6cda3 | 949 | char *string; |
7117c2d2 | 950 | size_t slen; |
ccc6cda3 JA |
951 | int sind; |
952 | { | |
f73dda09 | 953 | int c, i; |
ccc6cda3 JA |
954 | char *ret; |
955 | int pass_next, backquote, si; | |
7117c2d2 | 956 | DECLARE_MBSTATE; |
ccc6cda3 JA |
957 | |
958 | pass_next = backquote = 0; | |
7117c2d2 JA |
959 | i = sind; |
960 | while (c = string[i]) | |
726f6388 | 961 | { |
ccc6cda3 JA |
962 | if (pass_next) |
963 | { | |
964 | pass_next = 0; | |
7117c2d2 | 965 | ADVANCE_CHAR (string, slen, i); |
ccc6cda3 JA |
966 | continue; |
967 | } | |
968 | else if (c == '\\') | |
969 | { | |
970 | pass_next++; | |
7117c2d2 | 971 | i++; |
ccc6cda3 JA |
972 | continue; |
973 | } | |
974 | else if (backquote) | |
975 | { | |
976 | if (c == '`') | |
977 | backquote = 0; | |
7117c2d2 | 978 | ADVANCE_CHAR (string, slen, i); |
ccc6cda3 JA |
979 | continue; |
980 | } | |
981 | else if (c == '`') | |
982 | { | |
983 | backquote++; | |
7117c2d2 | 984 | i++; |
ccc6cda3 JA |
985 | continue; |
986 | } | |
cce855bc | 987 | else if (c == '$' && ((string[i + 1] == LPAREN) || (string[i + 1] == LBRACE))) |
ccc6cda3 JA |
988 | { |
989 | si = i + 2; | |
cce855bc | 990 | if (string[i + 1] == LPAREN) |
3185942a | 991 | ret = extract_command_subst (string, &si, SX_NOALLOC); |
ccc6cda3 | 992 | else |
495aee44 | 993 | ret = extract_dollar_brace_string (string, &si, Q_DOUBLE_QUOTES, SX_NOALLOC); |
ccc6cda3 | 994 | |
7117c2d2 | 995 | i = si + 1; |
ccc6cda3 JA |
996 | continue; |
997 | } | |
998 | else if (c != '"') | |
7117c2d2 JA |
999 | { |
1000 | ADVANCE_CHAR (string, slen, i); | |
1001 | continue; | |
1002 | } | |
ccc6cda3 JA |
1003 | else |
1004 | break; | |
726f6388 | 1005 | } |
ccc6cda3 JA |
1006 | |
1007 | if (c) | |
1008 | i++; | |
1009 | ||
1010 | return (i); | |
726f6388 JA |
1011 | } |
1012 | ||
ccc6cda3 JA |
1013 | /* Extract the contents of STRING as if it is enclosed in single quotes. |
1014 | SINDEX, when passed in, is the offset of the character immediately | |
1015 | following the opening single quote; on exit, SINDEX is left pointing after | |
1016 | the closing single quote. */ | |
1017 | static inline char * | |
1018 | string_extract_single_quoted (string, sindex) | |
1019 | char *string; | |
1020 | int *sindex; | |
1021 | { | |
f73dda09 | 1022 | register int i; |
7117c2d2 | 1023 | size_t slen; |
ccc6cda3 | 1024 | char *t; |
7117c2d2 | 1025 | DECLARE_MBSTATE; |
ccc6cda3 | 1026 | |
95732b49 JA |
1027 | /* Don't need slen for ADVANCE_CHAR unless multibyte chars possible. */ |
1028 | slen = (MB_CUR_MAX > 1) ? strlen (string + *sindex) + *sindex : 0; | |
7117c2d2 JA |
1029 | i = *sindex; |
1030 | while (string[i] && string[i] != '\'') | |
1031 | ADVANCE_CHAR (string, slen, i); | |
ccc6cda3 | 1032 | |
bb70624e | 1033 | t = substring (string, *sindex, i); |
ccc6cda3 JA |
1034 | |
1035 | if (string[i]) | |
1036 | i++; | |
1037 | *sindex = i; | |
1038 | ||
1039 | return (t); | |
1040 | } | |
1041 | ||
1042 | static inline int | |
7117c2d2 | 1043 | skip_single_quoted (string, slen, sind) |
0628567a | 1044 | const char *string; |
7117c2d2 | 1045 | size_t slen; |
ccc6cda3 JA |
1046 | int sind; |
1047 | { | |
28ef6c31 | 1048 | register int c; |
7117c2d2 JA |
1049 | DECLARE_MBSTATE; |
1050 | ||
1051 | c = sind; | |
1052 | while (string[c] && string[c] != '\'') | |
1053 | ADVANCE_CHAR (string, slen, c); | |
ccc6cda3 | 1054 | |
28ef6c31 JA |
1055 | if (string[c]) |
1056 | c++; | |
1057 | return c; | |
ccc6cda3 JA |
1058 | } |
1059 | ||
1060 | /* Just like string_extract, but doesn't hack backslashes or any of | |
bb70624e | 1061 | that other stuff. Obeys CTLESC quoting. Used to do splitting on $IFS. */ |
726f6388 | 1062 | static char * |
3185942a | 1063 | string_extract_verbatim (string, slen, sindex, charlist, flags) |
f73dda09 | 1064 | char *string; |
95732b49 | 1065 | size_t slen; |
ccc6cda3 | 1066 | int *sindex; |
f73dda09 | 1067 | char *charlist; |
3185942a | 1068 | int flags; |
ccc6cda3 | 1069 | { |
0001803f | 1070 | register int i; |
95732b49 JA |
1071 | #if defined (HANDLE_MULTIBYTE) |
1072 | size_t clen; | |
1073 | wchar_t *wcharlist; | |
1074 | #endif | |
ccc6cda3 JA |
1075 | int c; |
1076 | char *temp; | |
95732b49 | 1077 | DECLARE_MBSTATE; |
ccc6cda3 JA |
1078 | |
1079 | if (charlist[0] == '\'' && charlist[1] == '\0') | |
1080 | { | |
1081 | temp = string_extract_single_quoted (string, sindex); | |
1082 | --*sindex; /* leave *sindex at separator character */ | |
1083 | return temp; | |
1084 | } | |
1085 | ||
95732b49 JA |
1086 | i = *sindex; |
1087 | #if 0 | |
1088 | /* See how the MBLEN and ADVANCE_CHAR macros work to understand why we need | |
1089 | this only if MB_CUR_MAX > 1. */ | |
1090 | slen = (MB_CUR_MAX > 1) ? strlen (string + *sindex) + *sindex : 1; | |
1091 | #endif | |
1092 | #if defined (HANDLE_MULTIBYTE) | |
1093 | clen = strlen (charlist); | |
1094 | wcharlist = 0; | |
1095 | #endif | |
1096 | while (c = string[i]) | |
ccc6cda3 | 1097 | { |
95732b49 JA |
1098 | #if defined (HANDLE_MULTIBYTE) |
1099 | size_t mblength; | |
1100 | #endif | |
3185942a JA |
1101 | if ((flags & SX_NOCTLESC) == 0 && c == CTLESC) |
1102 | { | |
1103 | i += 2; | |
1104 | continue; | |
1105 | } | |
1106 | /* Even if flags contains SX_NOCTLESC, we let CTLESC quoting CTLNUL | |
1107 | through, to protect the CTLNULs from later calls to | |
1108 | remove_quoted_nulls. */ | |
1109 | else if ((flags & SX_NOESCCTLNUL) == 0 && c == CTLESC && string[i+1] == CTLNUL) | |
ccc6cda3 | 1110 | { |
95732b49 | 1111 | i += 2; |
ccc6cda3 JA |
1112 | continue; |
1113 | } | |
1114 | ||
95732b49 JA |
1115 | #if defined (HANDLE_MULTIBYTE) |
1116 | mblength = MBLEN (string + i, slen - i); | |
1117 | if (mblength > 1) | |
1118 | { | |
1119 | wchar_t wc; | |
1120 | mblength = mbtowc (&wc, string + i, slen - i); | |
1121 | if (MB_INVALIDCH (mblength)) | |
1122 | { | |
1123 | if (MEMBER (c, charlist)) | |
1124 | break; | |
1125 | } | |
1126 | else | |
1127 | { | |
1128 | if (wcharlist == 0) | |
1129 | { | |
1130 | size_t len; | |
1131 | len = mbstowcs (wcharlist, charlist, 0); | |
1132 | if (len == -1) | |
1133 | len = 0; | |
0628567a JA |
1134 | wcharlist = (wchar_t *)xmalloc (sizeof (wchar_t) * (len + 1)); |
1135 | mbstowcs (wcharlist, charlist, len + 1); | |
95732b49 JA |
1136 | } |
1137 | ||
1138 | if (wcschr (wcharlist, wc)) | |
1139 | break; | |
1140 | } | |
1141 | } | |
1142 | else | |
1143 | #endif | |
ccc6cda3 JA |
1144 | if (MEMBER (c, charlist)) |
1145 | break; | |
95732b49 JA |
1146 | |
1147 | ADVANCE_CHAR (string, slen, i); | |
ccc6cda3 JA |
1148 | } |
1149 | ||
95732b49 JA |
1150 | #if defined (HANDLE_MULTIBYTE) |
1151 | FREE (wcharlist); | |
1152 | #endif | |
1153 | ||
bb70624e | 1154 | temp = substring (string, *sindex, i); |
ccc6cda3 JA |
1155 | *sindex = i; |
1156 | ||
1157 | return (temp); | |
1158 | } | |
1159 | ||
1160 | /* Extract the $( construct in STRING, and return a new string. | |
1161 | Start extracting at (SINDEX) as if we had just seen "$(". | |
3185942a | 1162 | Make (SINDEX) get the position of the matching ")". ) |
0001803f | 1163 | XFLAGS is additional flags to pass to other extraction functions. */ |
ccc6cda3 | 1164 | char * |
3185942a | 1165 | extract_command_subst (string, sindex, xflags) |
726f6388 JA |
1166 | char *string; |
1167 | int *sindex; | |
3185942a | 1168 | int xflags; |
726f6388 | 1169 | { |
0001803f | 1170 | if (string[*sindex] == LPAREN) |
3185942a JA |
1171 | return (extract_delimited_string (string, sindex, "$(", "(", ")", xflags|SX_COMMAND)); /*)*/ |
1172 | else | |
1173 | { | |
1174 | xflags |= (no_longjmp_on_fatal_error ? SX_NOLONGJMP : 0); | |
1175 | return (xparse_dolparen (string, string+*sindex, sindex, xflags)); | |
1176 | } | |
ccc6cda3 JA |
1177 | } |
1178 | ||
28ef6c31 | 1179 | /* Extract the $[ construct in STRING, and return a new string. (]) |
ccc6cda3 JA |
1180 | Start extracting at (SINDEX) as if we had just seen "$[". |
1181 | Make (SINDEX) get the position of the matching "]". */ | |
1182 | char * | |
1183 | extract_arithmetic_subst (string, sindex) | |
1184 | char *string; | |
1185 | int *sindex; | |
1186 | { | |
7117c2d2 | 1187 | return (extract_delimited_string (string, sindex, "$[", "[", "]", 0)); /*]*/ |
ccc6cda3 JA |
1188 | } |
1189 | ||
1190 | #if defined (PROCESS_SUBSTITUTION) | |
1191 | /* Extract the <( or >( construct in STRING, and return a new string. | |
1192 | Start extracting at (SINDEX) as if we had just seen "<(". | |
cce855bc | 1193 | Make (SINDEX) get the position of the matching ")". */ /*))*/ |
ccc6cda3 | 1194 | char * |
85b94814 | 1195 | extract_process_subst (string, starter, sindex, xflags) |
ccc6cda3 JA |
1196 | char *string; |
1197 | char *starter; | |
1198 | int *sindex; | |
85b94814 | 1199 | int xflags; |
ccc6cda3 | 1200 | { |
85b94814 | 1201 | #if 0 |
ac50fbac | 1202 | return (extract_delimited_string (string, sindex, starter, "(", ")", SX_COMMAND)); |
85b94814 CR |
1203 | #else |
1204 | xflags |= (no_longjmp_on_fatal_error ? SX_NOLONGJMP : 0); | |
1205 | return (xparse_dolparen (string, string+*sindex, sindex, xflags)); | |
1206 | #endif | |
ccc6cda3 JA |
1207 | } |
1208 | #endif /* PROCESS_SUBSTITUTION */ | |
1209 | ||
1210 | #if defined (ARRAY_VARS) | |
95732b49 JA |
1211 | /* This can be fooled by unquoted right parens in the passed string. If |
1212 | each caller verifies that the last character in STRING is a right paren, | |
1213 | we don't even need to call extract_delimited_string. */ | |
ccc6cda3 JA |
1214 | char * |
1215 | extract_array_assignment_list (string, sindex) | |
1216 | char *string; | |
1217 | int *sindex; | |
1218 | { | |
95732b49 JA |
1219 | int slen; |
1220 | char *ret; | |
1221 | ||
1222 | slen = strlen (string); /* ( */ | |
1223 | if (string[slen - 1] == ')') | |
1224 | { | |
1225 | ret = substring (string, *sindex, slen - 1); | |
1226 | *sindex = slen - 1; | |
1227 | return ret; | |
1228 | } | |
1229 | return 0; | |
ccc6cda3 JA |
1230 | } |
1231 | #endif | |
1232 | ||
1233 | /* Extract and create a new string from the contents of STRING, a | |
1234 | character string delimited with OPENER and CLOSER. SINDEX is | |
1235 | the address of an int describing the current offset in STRING; | |
1236 | it should point to just after the first OPENER found. On exit, | |
1237 | SINDEX gets the position of the last character of the matching CLOSER. | |
1238 | If OPENER is more than a single character, ALT_OPENER, if non-null, | |
1239 | contains a character string that can also match CLOSER and thus | |
1240 | needs to be skipped. */ | |
1241 | static char * | |
7117c2d2 | 1242 | extract_delimited_string (string, sindex, opener, alt_opener, closer, flags) |
ccc6cda3 JA |
1243 | char *string; |
1244 | int *sindex; | |
1245 | char *opener, *alt_opener, *closer; | |
7117c2d2 | 1246 | int flags; |
ccc6cda3 JA |
1247 | { |
1248 | int i, c, si; | |
7117c2d2 | 1249 | size_t slen; |
ccc6cda3 | 1250 | char *t, *result; |
0628567a | 1251 | int pass_character, nesting_level, in_comment; |
ccc6cda3 | 1252 | int len_closer, len_opener, len_alt_opener; |
7117c2d2 | 1253 | DECLARE_MBSTATE; |
ccc6cda3 | 1254 | |
7117c2d2 | 1255 | slen = strlen (string + *sindex) + *sindex; |
ccc6cda3 JA |
1256 | len_opener = STRLEN (opener); |
1257 | len_alt_opener = STRLEN (alt_opener); | |
1258 | len_closer = STRLEN (closer); | |
726f6388 | 1259 | |
0628567a | 1260 | pass_character = in_comment = 0; |
726f6388 JA |
1261 | |
1262 | nesting_level = 1; | |
ccc6cda3 | 1263 | i = *sindex; |
726f6388 | 1264 | |
ccc6cda3 | 1265 | while (nesting_level) |
726f6388 | 1266 | { |
ccc6cda3 JA |
1267 | c = string[i]; |
1268 | ||
1269 | if (c == 0) | |
28ef6c31 | 1270 | break; |
ccc6cda3 | 1271 | |
0628567a JA |
1272 | if (in_comment) |
1273 | { | |
1274 | if (c == '\n') | |
1275 | in_comment = 0; | |
1276 | ADVANCE_CHAR (string, slen, i); | |
1277 | continue; | |
1278 | } | |
1279 | ||
ccc6cda3 | 1280 | if (pass_character) /* previous char was backslash */ |
726f6388 JA |
1281 | { |
1282 | pass_character = 0; | |
7117c2d2 | 1283 | ADVANCE_CHAR (string, slen, i); |
726f6388 JA |
1284 | continue; |
1285 | } | |
1286 | ||
0628567a | 1287 | /* Not exactly right yet; should handle shell metacharacters and |
0001803f | 1288 | multibyte characters, too. See COMMENT_BEGIN define in parse.y */ |
3185942a | 1289 | if ((flags & SX_COMMAND) && c == '#' && (i == 0 || string[i - 1] == '\n' || shellblank (string[i - 1]))) |
0628567a JA |
1290 | { |
1291 | in_comment = 1; | |
1292 | ADVANCE_CHAR (string, slen, i); | |
1293 | continue; | |
1294 | } | |
1295 | ||
7117c2d2 | 1296 | if (c == CTLESC || c == '\\') |
726f6388 | 1297 | { |
ccc6cda3 JA |
1298 | pass_character++; |
1299 | i++; | |
1300 | continue; | |
726f6388 JA |
1301 | } |
1302 | ||
495aee44 CR |
1303 | /* Process a nested command substitution, but only if we're parsing an |
1304 | arithmetic substitution. */ | |
0001803f CR |
1305 | if ((flags & SX_COMMAND) && string[i] == '$' && string[i+1] == LPAREN) |
1306 | { | |
1307 | si = i + 2; | |
495aee44 | 1308 | t = extract_command_subst (string, &si, flags|SX_NOALLOC); |
0001803f CR |
1309 | i = si + 1; |
1310 | continue; | |
1311 | } | |
0001803f | 1312 | |
ccc6cda3 JA |
1313 | /* Process a nested OPENER. */ |
1314 | if (STREQN (string + i, opener, len_opener)) | |
726f6388 | 1315 | { |
ccc6cda3 | 1316 | si = i + len_opener; |
3185942a | 1317 | t = extract_delimited_string (string, &si, opener, alt_opener, closer, flags|SX_NOALLOC); |
ccc6cda3 | 1318 | i = si + 1; |
ccc6cda3 | 1319 | continue; |
726f6388 JA |
1320 | } |
1321 | ||
ccc6cda3 JA |
1322 | /* Process a nested ALT_OPENER */ |
1323 | if (len_alt_opener && STREQN (string + i, alt_opener, len_alt_opener)) | |
726f6388 | 1324 | { |
ccc6cda3 | 1325 | si = i + len_alt_opener; |
3185942a | 1326 | t = extract_delimited_string (string, &si, alt_opener, alt_opener, closer, flags|SX_NOALLOC); |
ccc6cda3 | 1327 | i = si + 1; |
726f6388 JA |
1328 | continue; |
1329 | } | |
ccc6cda3 JA |
1330 | |
1331 | /* If the current substring terminates the delimited string, decrement | |
1332 | the nesting level. */ | |
1333 | if (STREQN (string + i, closer, len_closer)) | |
726f6388 | 1334 | { |
7117c2d2 | 1335 | i += len_closer - 1; /* move to last byte of the closer */ |
ccc6cda3 JA |
1336 | nesting_level--; |
1337 | if (nesting_level == 0) | |
1338 | break; | |
726f6388 | 1339 | } |
ccc6cda3 JA |
1340 | |
1341 | /* Pass old-style command substitution through verbatim. */ | |
1342 | if (c == '`') | |
28ef6c31 JA |
1343 | { |
1344 | si = i + 1; | |
3185942a | 1345 | t = string_extract (string, &si, "`", flags|SX_NOALLOC); |
28ef6c31 | 1346 | i = si + 1; |
28ef6c31 JA |
1347 | continue; |
1348 | } | |
ccc6cda3 | 1349 | |
7117c2d2 JA |
1350 | /* Pass single-quoted and double-quoted strings through verbatim. */ |
1351 | if (c == '\'' || c == '"') | |
28ef6c31 JA |
1352 | { |
1353 | si = i + 1; | |
7117c2d2 JA |
1354 | i = (c == '\'') ? skip_single_quoted (string, slen, si) |
1355 | : skip_double_quoted (string, slen, si); | |
28ef6c31 JA |
1356 | continue; |
1357 | } | |
ccc6cda3 | 1358 | |
7117c2d2 JA |
1359 | /* move past this character, which was not special. */ |
1360 | ADVANCE_CHAR (string, slen, i); | |
726f6388 JA |
1361 | } |
1362 | ||
b80f6443 | 1363 | if (c == 0 && nesting_level) |
726f6388 | 1364 | { |
b80f6443 JA |
1365 | if (no_longjmp_on_fatal_error == 0) |
1366 | { | |
b80f6443 | 1367 | last_command_exit_value = EXECUTION_FAILURE; |
ac50fbac | 1368 | report_error (_("bad substitution: no closing `%s' in %s"), closer, string); |
b80f6443 JA |
1369 | exp_jump_to_top_level (DISCARD); |
1370 | } | |
1371 | else | |
1372 | { | |
1373 | *sindex = i; | |
1374 | return (char *)NULL; | |
1375 | } | |
726f6388 | 1376 | } |
ccc6cda3 | 1377 | |
cce855bc | 1378 | si = i - *sindex - len_closer + 1; |
3185942a | 1379 | if (flags & SX_NOALLOC) |
7117c2d2 JA |
1380 | result = (char *)NULL; |
1381 | else | |
1382 | { | |
1383 | result = (char *)xmalloc (1 + si); | |
1384 | strncpy (result, string + *sindex, si); | |
1385 | result[si] = '\0'; | |
1386 | } | |
cce855bc JA |
1387 | *sindex = i; |
1388 | ||
726f6388 JA |
1389 | return (result); |
1390 | } | |
1391 | ||
ccc6cda3 JA |
1392 | /* Extract a parameter expansion expression within ${ and } from STRING. |
1393 | Obey the Posix.2 rules for finding the ending `}': count braces while | |
1394 | skipping over enclosed quoted strings and command substitutions. | |
1395 | SINDEX is the address of an int describing the current offset in STRING; | |
1396 | it should point to just after the first `{' found. On exit, SINDEX | |
1397 | gets the position of the matching `}'. QUOTED is non-zero if this | |
1398 | occurs inside double quotes. */ | |
1399 | /* XXX -- this is very similar to extract_delimited_string -- XXX */ | |
726f6388 | 1400 | static char * |
7117c2d2 | 1401 | extract_dollar_brace_string (string, sindex, quoted, flags) |
726f6388 | 1402 | char *string; |
7117c2d2 | 1403 | int *sindex, quoted, flags; |
726f6388 | 1404 | { |
f73dda09 | 1405 | register int i, c; |
7117c2d2 | 1406 | size_t slen; |
495aee44 | 1407 | int pass_character, nesting_level, si, dolbrace_state; |
ccc6cda3 | 1408 | char *result, *t; |
7117c2d2 | 1409 | DECLARE_MBSTATE; |
726f6388 | 1410 | |
ccc6cda3 | 1411 | pass_character = 0; |
ccc6cda3 | 1412 | nesting_level = 1; |
7117c2d2 | 1413 | slen = strlen (string + *sindex) + *sindex; |
ccc6cda3 | 1414 | |
495aee44 | 1415 | /* The handling of dolbrace_state needs to agree with the code in parse.y: |
49ed961b CR |
1416 | parse_matched_pair(). The different initial value is to handle the |
1417 | case where this function is called to parse the word in | |
1418 | ${param op word} (SX_WORD). */ | |
1419 | dolbrace_state = (flags & SX_WORD) ? DOLBRACE_WORD : DOLBRACE_PARAM; | |
1420 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && (flags & SX_POSIXEXP)) | |
1421 | dolbrace_state = DOLBRACE_QUOTE; | |
495aee44 | 1422 | |
7117c2d2 JA |
1423 | i = *sindex; |
1424 | while (c = string[i]) | |
726f6388 | 1425 | { |
ccc6cda3 | 1426 | if (pass_character) |
726f6388 | 1427 | { |
ccc6cda3 | 1428 | pass_character = 0; |
7117c2d2 | 1429 | ADVANCE_CHAR (string, slen, i); |
ccc6cda3 JA |
1430 | continue; |
1431 | } | |
726f6388 | 1432 | |
cce855bc JA |
1433 | /* CTLESCs and backslashes quote the next character. */ |
1434 | if (c == CTLESC || c == '\\') | |
726f6388 | 1435 | { |
ccc6cda3 | 1436 | pass_character++; |
7117c2d2 | 1437 | i++; |
726f6388 JA |
1438 | continue; |
1439 | } | |
1440 | ||
cce855bc | 1441 | if (string[i] == '$' && string[i+1] == LBRACE) |
726f6388 | 1442 | { |
ccc6cda3 | 1443 | nesting_level++; |
7117c2d2 | 1444 | i += 2; |
726f6388 JA |
1445 | continue; |
1446 | } | |
1447 | ||
cce855bc | 1448 | if (c == RBRACE) |
726f6388 | 1449 | { |
ccc6cda3 JA |
1450 | nesting_level--; |
1451 | if (nesting_level == 0) | |
1452 | break; | |
7117c2d2 | 1453 | i++; |
726f6388 JA |
1454 | continue; |
1455 | } | |
1456 | ||
ccc6cda3 JA |
1457 | /* Pass the contents of old-style command substitutions through |
1458 | verbatim. */ | |
1459 | if (c == '`') | |
726f6388 | 1460 | { |
ccc6cda3 | 1461 | si = i + 1; |
3185942a | 1462 | t = string_extract (string, &si, "`", flags|SX_NOALLOC); |
7117c2d2 | 1463 | i = si + 1; |
ccc6cda3 JA |
1464 | continue; |
1465 | } | |
726f6388 | 1466 | |
cce855bc JA |
1467 | /* Pass the contents of new-style command substitutions and |
1468 | arithmetic substitutions through verbatim. */ | |
1469 | if (string[i] == '$' && string[i+1] == LPAREN) | |
ccc6cda3 | 1470 | { |
726f6388 | 1471 | si = i + 2; |
3185942a | 1472 | t = extract_command_subst (string, &si, flags|SX_NOALLOC); |
7117c2d2 | 1473 | i = si + 1; |
726f6388 JA |
1474 | continue; |
1475 | } | |
1476 | ||
495aee44 CR |
1477 | /* Pass the contents of double-quoted strings through verbatim. */ |
1478 | if (c == '"') | |
1479 | { | |
1480 | si = i + 1; | |
1481 | i = skip_double_quoted (string, slen, si); | |
1482 | /* skip_XXX_quoted leaves index one past close quote */ | |
1483 | continue; | |
1484 | } | |
1485 | ||
1486 | if (c == '\'') | |
1487 | { | |
1488 | /*itrace("extract_dollar_brace_string: c == single quote flags = %d quoted = %d dolbrace_state = %d", flags, quoted, dolbrace_state);*/ | |
ac50fbac | 1489 | if (posixly_correct && shell_compatibility_level > 42 && dolbrace_state != DOLBRACE_QUOTE && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) |
495aee44 CR |
1490 | ADVANCE_CHAR (string, slen, i); |
1491 | else | |
1492 | { | |
1493 | si = i + 1; | |
1494 | i = skip_single_quoted (string, slen, si); | |
1495 | } | |
1496 | ||
1497 | continue; | |
1498 | } | |
7117c2d2 JA |
1499 | |
1500 | /* move past this character, which was not special. */ | |
1501 | ADVANCE_CHAR (string, slen, i); | |
495aee44 CR |
1502 | |
1503 | /* This logic must agree with parse.y:parse_matched_pair, since they | |
1504 | share the same defines. */ | |
1505 | if (dolbrace_state == DOLBRACE_PARAM && c == '%' && (i - *sindex) > 1) | |
1506 | dolbrace_state = DOLBRACE_QUOTE; | |
1507 | else if (dolbrace_state == DOLBRACE_PARAM && c == '#' && (i - *sindex) > 1) | |
1508 | dolbrace_state = DOLBRACE_QUOTE; | |
1509 | else if (dolbrace_state == DOLBRACE_PARAM && c == '/' && (i - *sindex) > 1) | |
ac50fbac | 1510 | dolbrace_state = DOLBRACE_QUOTE2; /* XXX */ |
495aee44 CR |
1511 | else if (dolbrace_state == DOLBRACE_PARAM && c == '^' && (i - *sindex) > 1) |
1512 | dolbrace_state = DOLBRACE_QUOTE; | |
1513 | else if (dolbrace_state == DOLBRACE_PARAM && c == ',' && (i - *sindex) > 1) | |
1514 | dolbrace_state = DOLBRACE_QUOTE; | |
1515 | else if (dolbrace_state == DOLBRACE_PARAM && strchr ("#%^,~:-=?+/", c) != 0) | |
1516 | dolbrace_state = DOLBRACE_OP; | |
1517 | else if (dolbrace_state == DOLBRACE_OP && strchr ("#%^,~:-=?+/", c) == 0) | |
1518 | dolbrace_state = DOLBRACE_WORD; | |
cce855bc | 1519 | } |
726f6388 | 1520 | |
b80f6443 | 1521 | if (c == 0 && nesting_level) |
cce855bc | 1522 | { |
b80f6443 JA |
1523 | if (no_longjmp_on_fatal_error == 0) |
1524 | { /* { */ | |
b80f6443 | 1525 | last_command_exit_value = EXECUTION_FAILURE; |
ac50fbac | 1526 | report_error (_("bad substitution: no closing `%s' in %s"), "}", string); |
b80f6443 JA |
1527 | exp_jump_to_top_level (DISCARD); |
1528 | } | |
1529 | else | |
1530 | { | |
1531 | *sindex = i; | |
1532 | return ((char *)NULL); | |
1533 | } | |
726f6388 | 1534 | } |
726f6388 | 1535 | |
3185942a | 1536 | result = (flags & SX_NOALLOC) ? (char *)NULL : substring (string, *sindex, i); |
726f6388 JA |
1537 | *sindex = i; |
1538 | ||
ccc6cda3 | 1539 | return (result); |
726f6388 JA |
1540 | } |
1541 | ||
ccc6cda3 JA |
1542 | /* Remove backslashes which are quoting backquotes from STRING. Modifies |
1543 | STRING, and returns a pointer to it. */ | |
1544 | char * | |
1545 | de_backslash (string) | |
726f6388 | 1546 | char *string; |
ccc6cda3 | 1547 | { |
7117c2d2 JA |
1548 | register size_t slen; |
1549 | register int i, j, prev_i; | |
1550 | DECLARE_MBSTATE; | |
726f6388 | 1551 | |
7117c2d2 JA |
1552 | slen = strlen (string); |
1553 | i = j = 0; | |
1554 | ||
1555 | /* Loop copying string[i] to string[j], i >= j. */ | |
1556 | while (i < slen) | |
1557 | { | |
1558 | if (string[i] == '\\' && (string[i + 1] == '`' || string[i + 1] == '\\' || | |
ccc6cda3 | 1559 | string[i + 1] == '$')) |
7117c2d2 JA |
1560 | i++; |
1561 | prev_i = i; | |
1562 | ADVANCE_CHAR (string, slen, i); | |
1563 | if (j < prev_i) | |
b80f6443 | 1564 | do string[j++] = string[prev_i++]; while (prev_i < i); |
7117c2d2 | 1565 | else |
b80f6443 | 1566 | j = i; |
7117c2d2 JA |
1567 | } |
1568 | string[j] = '\0'; | |
1569 | ||
ccc6cda3 JA |
1570 | return (string); |
1571 | } | |
726f6388 | 1572 | |
ccc6cda3 | 1573 | #if 0 |
cce855bc | 1574 | /*UNUSED*/ |
ccc6cda3 JA |
1575 | /* Replace instances of \! in a string with !. */ |
1576 | void | |
1577 | unquote_bang (string) | |
1578 | char *string; | |
1579 | { | |
1580 | register int i, j; | |
1581 | register char *temp; | |
726f6388 | 1582 | |
f73dda09 | 1583 | temp = (char *)xmalloc (1 + strlen (string)); |
726f6388 | 1584 | |
ccc6cda3 JA |
1585 | for (i = 0, j = 0; (temp[j] = string[i]); i++, j++) |
1586 | { | |
1587 | if (string[i] == '\\' && string[i + 1] == '!') | |
1588 | { | |
1589 | temp[j] = '!'; | |
1590 | i++; | |
1591 | } | |
1592 | } | |
1593 | strcpy (string, temp); | |
1594 | free (temp); | |
726f6388 | 1595 | } |
ccc6cda3 | 1596 | #endif |
726f6388 | 1597 | |
3185942a JA |
1598 | #define CQ_RETURN(x) do { no_longjmp_on_fatal_error = 0; return (x); } while (0) |
1599 | ||
89a92869 | 1600 | /* This function assumes s[i] == open; returns with s[ret] == close; used to |
0001803f CR |
1601 | parse array subscripts. FLAGS & 1 means to not attempt to skip over |
1602 | matched pairs of quotes or backquotes, or skip word expansions; it is | |
1603 | intended to be used after expansion has been performed and during final | |
1604 | assignment parsing (see arrayfunc.c:assign_compound_array_list()). */ | |
89a92869 CR |
1605 | static int |
1606 | skip_matched_pair (string, start, open, close, flags) | |
1607 | const char *string; | |
1608 | int start, open, close, flags; | |
1609 | { | |
1610 | int i, pass_next, backq, si, c, count; | |
1611 | size_t slen; | |
1612 | char *temp, *ss; | |
1613 | DECLARE_MBSTATE; | |
1614 | ||
1615 | slen = strlen (string + start) + start; | |
1616 | no_longjmp_on_fatal_error = 1; | |
1617 | ||
1618 | i = start + 1; /* skip over leading bracket */ | |
1619 | count = 1; | |
1620 | pass_next = backq = 0; | |
1621 | ss = (char *)string; | |
1622 | while (c = string[i]) | |
1623 | { | |
1624 | if (pass_next) | |
1625 | { | |
1626 | pass_next = 0; | |
1627 | if (c == 0) | |
1628 | CQ_RETURN(i); | |
1629 | ADVANCE_CHAR (string, slen, i); | |
1630 | continue; | |
1631 | } | |
1632 | else if (c == '\\') | |
1633 | { | |
1634 | pass_next = 1; | |
1635 | i++; | |
1636 | continue; | |
1637 | } | |
1638 | else if (backq) | |
1639 | { | |
1640 | if (c == '`') | |
1641 | backq = 0; | |
1642 | ADVANCE_CHAR (string, slen, i); | |
1643 | continue; | |
1644 | } | |
0001803f | 1645 | else if ((flags & 1) == 0 && c == '`') |
89a92869 CR |
1646 | { |
1647 | backq = 1; | |
1648 | i++; | |
1649 | continue; | |
1650 | } | |
0001803f | 1651 | else if ((flags & 1) == 0 && c == open) |
89a92869 CR |
1652 | { |
1653 | count++; | |
1654 | i++; | |
1655 | continue; | |
1656 | } | |
1657 | else if (c == close) | |
1658 | { | |
1659 | count--; | |
1660 | if (count == 0) | |
1661 | break; | |
1662 | i++; | |
1663 | continue; | |
1664 | } | |
0001803f | 1665 | else if ((flags & 1) == 0 && (c == '\'' || c == '"')) |
89a92869 CR |
1666 | { |
1667 | i = (c == '\'') ? skip_single_quoted (ss, slen, ++i) | |
1668 | : skip_double_quoted (ss, slen, ++i); | |
1669 | /* no increment, the skip functions increment past the closing quote. */ | |
1670 | } | |
0001803f | 1671 | else if ((flags&1) == 0 && c == '$' && (string[i+1] == LPAREN || string[i+1] == LBRACE)) |
89a92869 CR |
1672 | { |
1673 | si = i + 2; | |
1674 | if (string[si] == '\0') | |
1675 | CQ_RETURN(si); | |
1676 | ||
1677 | if (string[i+1] == LPAREN) | |
1678 | temp = extract_delimited_string (ss, &si, "$(", "(", ")", SX_NOALLOC|SX_COMMAND); /* ) */ | |
1679 | else | |
1680 | temp = extract_dollar_brace_string (ss, &si, 0, SX_NOALLOC); | |
1681 | i = si; | |
1682 | if (string[i] == '\0') /* don't increment i past EOS in loop */ | |
1683 | break; | |
1684 | i++; | |
1685 | continue; | |
1686 | } | |
1687 | else | |
1688 | ADVANCE_CHAR (string, slen, i); | |
1689 | } | |
1690 | ||
1691 | CQ_RETURN(i); | |
1692 | } | |
1693 | ||
1694 | #if defined (ARRAY_VARS) | |
1695 | int | |
0001803f | 1696 | skipsubscript (string, start, flags) |
89a92869 | 1697 | const char *string; |
0001803f | 1698 | int start, flags; |
89a92869 | 1699 | { |
0001803f | 1700 | return (skip_matched_pair (string, start, '[', ']', flags)); |
89a92869 CR |
1701 | } |
1702 | #endif | |
1703 | ||
3185942a JA |
1704 | /* Skip characters in STRING until we find a character in DELIMS, and return |
1705 | the index of that character. START is the index into string at which we | |
1706 | begin. This is similar in spirit to strpbrk, but it returns an index into | |
1707 | STRING and takes a starting index. This little piece of code knows quite | |
1708 | a lot of shell syntax. It's very similar to skip_double_quoted and other | |
1709 | functions of that ilk. */ | |
1710 | int | |
1711 | skip_to_delim (string, start, delims, flags) | |
1712 | char *string; | |
1713 | int start; | |
1714 | char *delims; | |
1715 | int flags; | |
1716 | { | |
0001803f | 1717 | int i, pass_next, backq, si, c, invert, skipquote, skipcmd; |
3185942a | 1718 | size_t slen; |
495aee44 | 1719 | char *temp, open[3]; |
3185942a JA |
1720 | DECLARE_MBSTATE; |
1721 | ||
1722 | slen = strlen (string + start) + start; | |
1723 | if (flags & SD_NOJMP) | |
1724 | no_longjmp_on_fatal_error = 1; | |
1725 | invert = (flags & SD_INVERT); | |
0001803f | 1726 | skipcmd = (flags & SD_NOSKIPCMD) == 0; |
3185942a JA |
1727 | |
1728 | i = start; | |
1729 | pass_next = backq = 0; | |
1730 | while (c = string[i]) | |
1731 | { | |
0001803f CR |
1732 | /* If this is non-zero, we should not let quote characters be delimiters |
1733 | and the current character is a single or double quote. We should not | |
1734 | test whether or not it's a delimiter until after we skip single- or | |
1735 | double-quoted strings. */ | |
1736 | skipquote = ((flags & SD_NOQUOTEDELIM) && (c == '\'' || c =='"')); | |
3185942a JA |
1737 | if (pass_next) |
1738 | { | |
1739 | pass_next = 0; | |
1740 | if (c == 0) | |
1741 | CQ_RETURN(i); | |
1742 | ADVANCE_CHAR (string, slen, i); | |
1743 | continue; | |
1744 | } | |
1745 | else if (c == '\\') | |
1746 | { | |
1747 | pass_next = 1; | |
1748 | i++; | |
1749 | continue; | |
1750 | } | |
1751 | else if (backq) | |
1752 | { | |
1753 | if (c == '`') | |
1754 | backq = 0; | |
1755 | ADVANCE_CHAR (string, slen, i); | |
1756 | continue; | |
1757 | } | |
1758 | else if (c == '`') | |
1759 | { | |
1760 | backq = 1; | |
1761 | i++; | |
1762 | continue; | |
1763 | } | |
0001803f | 1764 | else if (skipquote == 0 && invert == 0 && member (c, delims)) |
3185942a JA |
1765 | break; |
1766 | else if (c == '\'' || c == '"') | |
1767 | { | |
1768 | i = (c == '\'') ? skip_single_quoted (string, slen, ++i) | |
1769 | : skip_double_quoted (string, slen, ++i); | |
1770 | /* no increment, the skip functions increment past the closing quote. */ | |
1771 | } | |
0001803f | 1772 | else if (c == '$' && ((skipcmd && string[i+1] == LPAREN) || string[i+1] == LBRACE)) |
3185942a JA |
1773 | { |
1774 | si = i + 2; | |
1775 | if (string[si] == '\0') | |
1776 | CQ_RETURN(si); | |
1777 | ||
1778 | if (string[i+1] == LPAREN) | |
1779 | temp = extract_delimited_string (string, &si, "$(", "(", ")", SX_NOALLOC|SX_COMMAND); /* ) */ | |
1780 | else | |
1781 | temp = extract_dollar_brace_string (string, &si, 0, SX_NOALLOC); | |
1782 | i = si; | |
1783 | if (string[i] == '\0') /* don't increment i past EOS in loop */ | |
1784 | break; | |
1785 | i++; | |
1786 | continue; | |
1787 | } | |
0001803f CR |
1788 | #if defined (PROCESS_SUBSTITUTION) |
1789 | else if (skipcmd && (c == '<' || c == '>') && string[i+1] == LPAREN) | |
1790 | { | |
1791 | si = i + 2; | |
1792 | if (string[si] == '\0') | |
1793 | CQ_RETURN(si); | |
85b94814 | 1794 | temp = extract_process_subst (string, (c == '<') ? "<(" : ">(", &si, 0); |
ac50fbac | 1795 | free (temp); /* no SX_ALLOC here */ |
0001803f CR |
1796 | i = si; |
1797 | if (string[i] == '\0') | |
1798 | break; | |
1799 | i++; | |
1800 | continue; | |
1801 | } | |
1802 | #endif /* PROCESS_SUBSTITUTION */ | |
495aee44 CR |
1803 | #if defined (EXTENDED_GLOB) |
1804 | else if ((flags & SD_EXTGLOB) && extended_glob && string[i+1] == LPAREN && member (c, "?*+!@")) | |
1805 | { | |
1806 | si = i + 2; | |
1807 | if (string[si] == '\0') | |
1808 | CQ_RETURN(si); | |
1809 | ||
1810 | open[0] = c; | |
1811 | open[1] = LPAREN; | |
1812 | open[2] = '\0'; | |
1813 | temp = extract_delimited_string (string, &si, open, "(", ")", SX_NOALLOC); /* ) */ | |
1814 | ||
1815 | i = si; | |
1816 | if (string[i] == '\0') /* don't increment i past EOS in loop */ | |
1817 | break; | |
1818 | i++; | |
1819 | continue; | |
1820 | } | |
1821 | #endif | |
ac50fbac CR |
1822 | else if ((flags & SD_GLOB) && c == LBRACK) |
1823 | { | |
1824 | si = i + 1; | |
1825 | if (string[si] == '\0') | |
1826 | CQ_RETURN(si); | |
1827 | ||
1828 | temp = extract_delimited_string (string, &si, "[", "[", "]", SX_NOALLOC); /* ] */ | |
1829 | ||
1830 | i = si; | |
1831 | if (string[i] == '\0') /* don't increment i past EOS in loop */ | |
1832 | break; | |
1833 | i++; | |
1834 | continue; | |
1835 | } | |
0001803f | 1836 | else if ((skipquote || invert) && (member (c, delims) == 0)) |
3185942a JA |
1837 | break; |
1838 | else | |
1839 | ADVANCE_CHAR (string, slen, i); | |
1840 | } | |
1841 | ||
1842 | CQ_RETURN(i); | |
1843 | } | |
1844 | ||
ccc6cda3 | 1845 | #if defined (READLINE) |
726f6388 JA |
1846 | /* Return 1 if the portion of STRING ending at EINDEX is quoted (there is |
1847 | an unclosed quoted string), or if the character at EINDEX is quoted | |
28ef6c31 | 1848 | by a backslash. NO_LONGJMP_ON_FATAL_ERROR is used to flag that the various |
b72432fd | 1849 | single and double-quoted string parsing functions should not return an |
7117c2d2 JA |
1850 | error if there are unclosed quotes or braces. The characters that this |
1851 | recognizes need to be the same as the contents of | |
1852 | rl_completer_quote_characters. */ | |
b72432fd | 1853 | |
726f6388 JA |
1854 | int |
1855 | char_is_quoted (string, eindex) | |
1856 | char *string; | |
1857 | int eindex; | |
1858 | { | |
7117c2d2 JA |
1859 | int i, pass_next, c; |
1860 | size_t slen; | |
1861 | DECLARE_MBSTATE; | |
726f6388 | 1862 | |
7117c2d2 | 1863 | slen = strlen (string); |
28ef6c31 | 1864 | no_longjmp_on_fatal_error = 1; |
7117c2d2 JA |
1865 | i = pass_next = 0; |
1866 | while (i <= eindex) | |
726f6388 | 1867 | { |
7117c2d2 JA |
1868 | c = string[i]; |
1869 | ||
726f6388 JA |
1870 | if (pass_next) |
1871 | { | |
1872 | pass_next = 0; | |
1873 | if (i >= eindex) /* XXX was if (i >= eindex - 1) */ | |
b72432fd | 1874 | CQ_RETURN(1); |
7117c2d2 | 1875 | ADVANCE_CHAR (string, slen, i); |
726f6388 JA |
1876 | continue; |
1877 | } | |
7117c2d2 | 1878 | else if (c == '\\') |
ccc6cda3 JA |
1879 | { |
1880 | pass_next = 1; | |
7117c2d2 | 1881 | i++; |
ccc6cda3 JA |
1882 | continue; |
1883 | } | |
7117c2d2 JA |
1884 | else if (c == '\'' || c == '"') |
1885 | { | |
1886 | i = (c == '\'') ? skip_single_quoted (string, slen, ++i) | |
1887 | : skip_double_quoted (string, slen, ++i); | |
1888 | if (i > eindex) | |
1889 | CQ_RETURN(1); | |
1890 | /* no increment, the skip_xxx functions go one past end */ | |
1891 | } | |
1892 | else | |
1893 | ADVANCE_CHAR (string, slen, i); | |
726f6388 | 1894 | } |
7117c2d2 | 1895 | |
b72432fd | 1896 | CQ_RETURN(0); |
726f6388 JA |
1897 | } |
1898 | ||
726f6388 JA |
1899 | int |
1900 | unclosed_pair (string, eindex, openstr) | |
1901 | char *string; | |
1902 | int eindex; | |
1903 | char *openstr; | |
1904 | { | |
ccc6cda3 | 1905 | int i, pass_next, openc, olen; |
7117c2d2 JA |
1906 | size_t slen; |
1907 | DECLARE_MBSTATE; | |
726f6388 | 1908 | |
7117c2d2 | 1909 | slen = strlen (string); |
726f6388 | 1910 | olen = strlen (openstr); |
7117c2d2 JA |
1911 | i = pass_next = openc = 0; |
1912 | while (i <= eindex) | |
726f6388 JA |
1913 | { |
1914 | if (pass_next) | |
1915 | { | |
1916 | pass_next = 0; | |
1917 | if (i >= eindex) /* XXX was if (i >= eindex - 1) */ | |
1918 | return 0; | |
7117c2d2 JA |
1919 | ADVANCE_CHAR (string, slen, i); |
1920 | continue; | |
1921 | } | |
1922 | else if (string[i] == '\\') | |
1923 | { | |
1924 | pass_next = 1; | |
1925 | i++; | |
726f6388 JA |
1926 | continue; |
1927 | } | |
1928 | else if (STREQN (string + i, openstr, olen)) | |
1929 | { | |
1930 | openc = 1 - openc; | |
7117c2d2 | 1931 | i += olen; |
726f6388 | 1932 | } |
ccc6cda3 | 1933 | else if (string[i] == '\'' || string[i] == '"') |
726f6388 | 1934 | { |
7117c2d2 JA |
1935 | i = (string[i] == '\'') ? skip_single_quoted (string, slen, i) |
1936 | : skip_double_quoted (string, slen, i); | |
726f6388 JA |
1937 | if (i > eindex) |
1938 | return 0; | |
1939 | } | |
7117c2d2 JA |
1940 | else |
1941 | ADVANCE_CHAR (string, slen, i); | |
726f6388 JA |
1942 | } |
1943 | return (openc); | |
1944 | } | |
bb70624e | 1945 | |
bb70624e JA |
1946 | /* Split STRING (length SLEN) at DELIMS, and return a WORD_LIST with the |
1947 | individual words. If DELIMS is NULL, the current value of $IFS is used | |
b80f6443 JA |
1948 | to split the string, and the function follows the shell field splitting |
1949 | rules. SENTINEL is an index to look for. NWP, if non-NULL, | |
bb70624e JA |
1950 | gets the number of words in the returned list. CWP, if non-NULL, gets |
1951 | the index of the word containing SENTINEL. Non-whitespace chars in | |
1952 | DELIMS delimit separate fields. */ | |
1953 | WORD_LIST * | |
0001803f | 1954 | split_at_delims (string, slen, delims, sentinel, flags, nwp, cwp) |
bb70624e JA |
1955 | char *string; |
1956 | int slen; | |
1957 | char *delims; | |
0001803f | 1958 | int sentinel, flags; |
bb70624e JA |
1959 | int *nwp, *cwp; |
1960 | { | |
0001803f | 1961 | int ts, te, i, nw, cw, ifs_split, dflags; |
f73dda09 | 1962 | char *token, *d, *d2; |
bb70624e JA |
1963 | WORD_LIST *ret, *tl; |
1964 | ||
1965 | if (string == 0 || *string == '\0') | |
1966 | { | |
1967 | if (nwp) | |
1968 | *nwp = 0; | |
1969 | if (cwp) | |
1970 | *cwp = 0; | |
1971 | return ((WORD_LIST *)NULL); | |
1972 | } | |
1973 | ||
7117c2d2 | 1974 | d = (delims == 0) ? ifs_value : delims; |
b80f6443 | 1975 | ifs_split = delims == 0; |
bb70624e JA |
1976 | |
1977 | /* Make d2 the non-whitespace characters in delims */ | |
1978 | d2 = 0; | |
1979 | if (delims) | |
1980 | { | |
95732b49 JA |
1981 | size_t slength; |
1982 | #if defined (HANDLE_MULTIBYTE) | |
1983 | size_t mblength = 1; | |
1984 | #endif | |
1985 | DECLARE_MBSTATE; | |
1986 | ||
1987 | slength = strlen (delims); | |
1988 | d2 = (char *)xmalloc (slength + 1); | |
1989 | i = ts = 0; | |
1990 | while (delims[i]) | |
bb70624e | 1991 | { |
95732b49 | 1992 | #if defined (HANDLE_MULTIBYTE) |
0628567a JA |
1993 | mbstate_t state_bak; |
1994 | state_bak = state; | |
95732b49 JA |
1995 | mblength = MBRLEN (delims + i, slength, &state); |
1996 | if (MB_INVALIDCH (mblength)) | |
1997 | state = state_bak; | |
1998 | else if (mblength > 1) | |
1999 | { | |
2000 | memcpy (d2 + ts, delims + i, mblength); | |
2001 | ts += mblength; | |
2002 | i += mblength; | |
2003 | slength -= mblength; | |
2004 | continue; | |
2005 | } | |
2006 | #endif | |
2007 | if (whitespace (delims[i]) == 0) | |
bb70624e | 2008 | d2[ts++] = delims[i]; |
95732b49 JA |
2009 | |
2010 | i++; | |
2011 | slength--; | |
bb70624e JA |
2012 | } |
2013 | d2[ts] = '\0'; | |
2014 | } | |
2015 | ||
2016 | ret = (WORD_LIST *)NULL; | |
2017 | ||
0001803f | 2018 | /* Remove sequences of whitespace characters at the start of the string, as |
b80f6443 JA |
2019 | long as those characters are delimiters. */ |
2020 | for (i = 0; member (string[i], d) && spctabnl (string[i]); i++) | |
bb70624e JA |
2021 | ; |
2022 | if (string[i] == '\0') | |
2023 | return (ret); | |
2024 | ||
2025 | ts = i; | |
2026 | nw = 0; | |
2027 | cw = -1; | |
0001803f | 2028 | dflags = flags|SD_NOJMP; |
bb70624e JA |
2029 | while (1) |
2030 | { | |
0001803f | 2031 | te = skip_to_delim (string, ts, d, dflags); |
bb70624e JA |
2032 | |
2033 | /* If we have a non-whitespace delimiter character, use it to make a | |
2034 | separate field. This is just about what $IFS splitting does and | |
2035 | is closer to the behavior of the shell parser. */ | |
28ef6c31 | 2036 | if (ts == te && d2 && member (string[ts], d2)) |
bb70624e JA |
2037 | { |
2038 | te = ts + 1; | |
b80f6443 JA |
2039 | /* If we're using IFS splitting, the non-whitespace delimiter char |
2040 | and any additional IFS whitespace delimits a field. */ | |
2041 | if (ifs_split) | |
2042 | while (member (string[te], d) && spctabnl (string[te])) | |
2043 | te++; | |
2044 | else | |
2045 | while (member (string[te], d2)) | |
2046 | te++; | |
bb70624e JA |
2047 | } |
2048 | ||
2049 | token = substring (string, ts, te); | |
2050 | ||
2051 | ret = add_string_to_list (token, ret); | |
2052 | free (token); | |
2053 | nw++; | |
2054 | ||
2055 | if (sentinel >= ts && sentinel <= te) | |
2056 | cw = nw; | |
2057 | ||
2058 | /* If the cursor is at whitespace just before word start, set the | |
28ef6c31 | 2059 | sentinel word to the current word. */ |
bb70624e JA |
2060 | if (cwp && cw == -1 && sentinel == ts-1) |
2061 | cw = nw; | |
2062 | ||
2063 | /* If the cursor is at whitespace between two words, make a new, empty | |
28ef6c31 JA |
2064 | word, add it before (well, after, since the list is in reverse order) |
2065 | the word we just added, and set the current word to that one. */ | |
bb70624e | 2066 | if (cwp && cw == -1 && sentinel < ts) |
28ef6c31 | 2067 | { |
7117c2d2 | 2068 | tl = make_word_list (make_word (""), ret->next); |
28ef6c31 JA |
2069 | ret->next = tl; |
2070 | cw = nw; | |
2071 | nw++; | |
2072 | } | |
bb70624e JA |
2073 | |
2074 | if (string[te] == 0) | |
2075 | break; | |
2076 | ||
b80f6443 JA |
2077 | i = te; |
2078 | while (member (string[i], d) && (ifs_split || spctabnl(string[i]))) | |
bb70624e JA |
2079 | i++; |
2080 | ||
2081 | if (string[i]) | |
2082 | ts = i; | |
2083 | else | |
2084 | break; | |
2085 | } | |
2086 | ||
2087 | /* Special case for SENTINEL at the end of STRING. If we haven't found | |
2088 | the word containing SENTINEL yet, and the index we're looking for is at | |
0001803f CR |
2089 | the end of STRING (or past the end of the previously-found token, |
2090 | possible if the end of the line is composed solely of IFS whitespace) | |
2091 | add an additional null argument and set the current word pointer to that. */ | |
2092 | if (cwp && cw == -1 && (sentinel >= slen || sentinel >= te)) | |
bb70624e JA |
2093 | { |
2094 | if (whitespace (string[sentinel - 1])) | |
28ef6c31 JA |
2095 | { |
2096 | token = ""; | |
2097 | ret = add_string_to_list (token, ret); | |
2098 | nw++; | |
2099 | } | |
bb70624e JA |
2100 | cw = nw; |
2101 | } | |
2102 | ||
2103 | if (nwp) | |
2104 | *nwp = nw; | |
2105 | if (cwp) | |
2106 | *cwp = cw; | |
2107 | ||
ac50fbac CR |
2108 | FREE (d2); |
2109 | ||
bb70624e JA |
2110 | return (REVERSE_LIST (ret, WORD_LIST *)); |
2111 | } | |
726f6388 JA |
2112 | #endif /* READLINE */ |
2113 | ||
ccc6cda3 JA |
2114 | #if 0 |
2115 | /* UNUSED */ | |
726f6388 JA |
2116 | /* Extract the name of the variable to bind to from the assignment string. */ |
2117 | char * | |
2118 | assignment_name (string) | |
2119 | char *string; | |
2120 | { | |
ccc6cda3 | 2121 | int offset; |
726f6388 JA |
2122 | char *temp; |
2123 | ||
b80f6443 | 2124 | offset = assignment (string, 0); |
ccc6cda3 | 2125 | if (offset == 0) |
726f6388 | 2126 | return (char *)NULL; |
bb70624e | 2127 | temp = substring (string, 0, offset); |
726f6388 JA |
2128 | return (temp); |
2129 | } | |
ccc6cda3 | 2130 | #endif |
726f6388 | 2131 | |
cce855bc JA |
2132 | /* **************************************************************** */ |
2133 | /* */ | |
2134 | /* Functions to convert strings to WORD_LISTs and vice versa */ | |
2135 | /* */ | |
2136 | /* **************************************************************** */ | |
2137 | ||
726f6388 JA |
2138 | /* Return a single string of all the words in LIST. SEP is the separator |
2139 | to put between individual elements of LIST in the output string. */ | |
7117c2d2 | 2140 | char * |
726f6388 JA |
2141 | string_list_internal (list, sep) |
2142 | WORD_LIST *list; | |
2143 | char *sep; | |
2144 | { | |
2145 | register WORD_LIST *t; | |
2146 | char *result, *r; | |
2147 | int word_len, sep_len, result_size; | |
2148 | ||
ccc6cda3 | 2149 | if (list == 0) |
726f6388 JA |
2150 | return ((char *)NULL); |
2151 | ||
b80f6443 JA |
2152 | /* Short-circuit quickly if we don't need to separate anything. */ |
2153 | if (list->next == 0) | |
2154 | return (savestring (list->word->word)); | |
2155 | ||
726f6388 JA |
2156 | /* This is nearly always called with either sep[0] == 0 or sep[1] == 0. */ |
2157 | sep_len = STRLEN (sep); | |
2158 | result_size = 0; | |
2159 | ||
2160 | for (t = list; t; t = t->next) | |
2161 | { | |
2162 | if (t != list) | |
2163 | result_size += sep_len; | |
2164 | result_size += strlen (t->word->word); | |
2165 | } | |
2166 | ||
f73dda09 | 2167 | r = result = (char *)xmalloc (result_size + 1); |
726f6388 JA |
2168 | |
2169 | for (t = list; t; t = t->next) | |
2170 | { | |
2171 | if (t != list && sep_len) | |
2172 | { | |
ccc6cda3 JA |
2173 | if (sep_len > 1) |
2174 | { | |
2175 | FASTCOPY (sep, r, sep_len); | |
2176 | r += sep_len; | |
2177 | } | |
2178 | else | |
2179 | *r++ = sep[0]; | |
726f6388 JA |
2180 | } |
2181 | ||
2182 | word_len = strlen (t->word->word); | |
2183 | FASTCOPY (t->word->word, r, word_len); | |
2184 | r += word_len; | |
2185 | } | |
2186 | ||
ccc6cda3 | 2187 | *r = '\0'; |
726f6388 JA |
2188 | return (result); |
2189 | } | |
2190 | ||
2191 | /* Return a single string of all the words present in LIST, separating | |
2192 | each word with a space. */ | |
2193 | char * | |
2194 | string_list (list) | |
2195 | WORD_LIST *list; | |
2196 | { | |
2197 | return (string_list_internal (list, " ")); | |
2198 | } | |
2199 | ||
3185942a JA |
2200 | /* An external interface that can be used by the rest of the shell to |
2201 | obtain a string containing the first character in $IFS. Handles all | |
2202 | the multibyte complications. If LENP is non-null, it is set to the | |
2203 | length of the returned string. */ | |
2204 | char * | |
2205 | ifs_firstchar (lenp) | |
2206 | int *lenp; | |
2207 | { | |
2208 | char *ret; | |
2209 | int len; | |
2210 | ||
2211 | ret = xmalloc (MB_LEN_MAX + 1); | |
2212 | #if defined (HANDLE_MULTIBYTE) | |
2213 | if (ifs_firstc_len == 1) | |
2214 | { | |
2215 | ret[0] = ifs_firstc[0]; | |
2216 | ret[1] = '\0'; | |
2217 | len = ret[0] ? 1 : 0; | |
2218 | } | |
2219 | else | |
2220 | { | |
2221 | memcpy (ret, ifs_firstc, ifs_firstc_len); | |
2222 | ret[len = ifs_firstc_len] = '\0'; | |
2223 | } | |
2224 | #else | |
2225 | ret[0] = ifs_firstc; | |
2226 | ret[1] = '\0'; | |
2227 | len = ret[0] ? 0 : 1; | |
2228 | #endif | |
2229 | ||
2230 | if (lenp) | |
2231 | *lenp = len; | |
2232 | ||
2233 | return ret; | |
2234 | } | |
2235 | ||
726f6388 JA |
2236 | /* Return a single string of all the words present in LIST, obeying the |
2237 | quoting rules for "$*", to wit: (P1003.2, draft 11, 3.5.2) "If the | |
2238 | expansion [of $*] appears within a double quoted string, it expands | |
2239 | to a single field with the value of each parameter separated by the | |
2240 | first character of the IFS variable, or by a <space> if IFS is unset." */ | |
f73dda09 | 2241 | char * |
726f6388 JA |
2242 | string_list_dollar_star (list) |
2243 | WORD_LIST *list; | |
2244 | { | |
0628567a | 2245 | char *ret; |
95732b49 | 2246 | #if defined (HANDLE_MULTIBYTE) |
0628567a | 2247 | # if defined (__GNUC__) |
95732b49 | 2248 | char sep[MB_CUR_MAX + 1]; |
0628567a JA |
2249 | # else |
2250 | char *sep = 0; | |
2251 | # endif | |
95732b49 | 2252 | #else |
7117c2d2 | 2253 | char sep[2]; |
95732b49 | 2254 | #endif |
726f6388 | 2255 | |
95732b49 | 2256 | #if defined (HANDLE_MULTIBYTE) |
0628567a JA |
2257 | # if !defined (__GNUC__) |
2258 | sep = (char *)xmalloc (MB_CUR_MAX + 1); | |
2259 | # endif /* !__GNUC__ */ | |
95732b49 JA |
2260 | if (ifs_firstc_len == 1) |
2261 | { | |
2262 | sep[0] = ifs_firstc[0]; | |
2263 | sep[1] = '\0'; | |
2264 | } | |
2265 | else | |
2266 | { | |
2267 | memcpy (sep, ifs_firstc, ifs_firstc_len); | |
2268 | sep[ifs_firstc_len] = '\0'; | |
2269 | } | |
2270 | #else | |
7117c2d2 | 2271 | sep[0] = ifs_firstc; |
726f6388 | 2272 | sep[1] = '\0'; |
95732b49 | 2273 | #endif |
726f6388 | 2274 | |
0628567a JA |
2275 | ret = string_list_internal (list, sep); |
2276 | #if defined (HANDLE_MULTIBYTE) && !defined (__GNUC__) | |
2277 | free (sep); | |
2278 | #endif | |
2279 | return ret; | |
726f6388 JA |
2280 | } |
2281 | ||
cce855bc JA |
2282 | /* Turn $@ into a string. If (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) |
2283 | is non-zero, the $@ appears within double quotes, and we should quote | |
2284 | the list before converting it into a string. If IFS is unset, and the | |
2285 | word is not quoted, we just need to quote CTLESC and CTLNUL characters | |
2286 | in the words in the list, because the default value of $IFS is | |
2287 | <space><tab><newline>, IFS characters in the words in the list should | |
2288 | also be split. If IFS is null, and the word is not quoted, we need | |
2289 | to quote the words in the list to preserve the positional parameters | |
2290 | exactly. */ | |
f73dda09 | 2291 | char * |
cce855bc JA |
2292 | string_list_dollar_at (list, quoted) |
2293 | WORD_LIST *list; | |
2294 | int quoted; | |
2295 | { | |
95732b49 JA |
2296 | char *ifs, *ret; |
2297 | #if defined (HANDLE_MULTIBYTE) | |
0628567a | 2298 | # if defined (__GNUC__) |
95732b49 | 2299 | char sep[MB_CUR_MAX + 1]; |
0628567a JA |
2300 | # else |
2301 | char *sep = 0; | |
2302 | # endif /* !__GNUC__ */ | |
95732b49 JA |
2303 | #else |
2304 | char sep[2]; | |
2305 | #endif | |
cce855bc JA |
2306 | WORD_LIST *tlist; |
2307 | ||
7117c2d2 JA |
2308 | /* XXX this could just be ifs = ifs_value; */ |
2309 | ifs = ifs_var ? value_cell (ifs_var) : (char *)0; | |
cce855bc | 2310 | |
95732b49 | 2311 | #if defined (HANDLE_MULTIBYTE) |
0628567a JA |
2312 | # if !defined (__GNUC__) |
2313 | sep = (char *)xmalloc (MB_CUR_MAX + 1); | |
2314 | # endif /* !__GNUC__ */ | |
95732b49 JA |
2315 | if (ifs && *ifs) |
2316 | { | |
2317 | if (ifs_firstc_len == 1) | |
2318 | { | |
2319 | sep[0] = ifs_firstc[0]; | |
2320 | sep[1] = '\0'; | |
2321 | } | |
2322 | else | |
2323 | { | |
2324 | memcpy (sep, ifs_firstc, ifs_firstc_len); | |
2325 | sep[ifs_firstc_len] = '\0'; | |
2326 | } | |
2327 | } | |
2328 | else | |
2329 | { | |
2330 | sep[0] = ' '; | |
2331 | sep[1] = '\0'; | |
2332 | } | |
2333 | #else | |
cce855bc JA |
2334 | sep[0] = (ifs == 0 || *ifs == 0) ? ' ' : *ifs; |
2335 | sep[1] = '\0'; | |
95732b49 | 2336 | #endif |
cce855bc | 2337 | |
f1be666c JA |
2338 | /* XXX -- why call quote_list if ifs == 0? we can get away without doing |
2339 | it now that quote_escapes quotes spaces */ | |
0001803f | 2340 | tlist = (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES|Q_PATQUOTE)) |
cce855bc JA |
2341 | ? quote_list (list) |
2342 | : list_quote_escapes (list); | |
0628567a JA |
2343 | |
2344 | ret = string_list_internal (tlist, sep); | |
2345 | #if defined (HANDLE_MULTIBYTE) && !defined (__GNUC__) | |
2346 | free (sep); | |
2347 | #endif | |
2348 | return ret; | |
cce855bc JA |
2349 | } |
2350 | ||
ac50fbac | 2351 | /* Turn the positional parameters into a string, understanding quoting and |
3185942a JA |
2352 | the various subtleties of using the first character of $IFS as the |
2353 | separator. Calls string_list_dollar_at, string_list_dollar_star, and | |
2354 | string_list as appropriate. */ | |
2355 | char * | |
2356 | string_list_pos_params (pchar, list, quoted) | |
2357 | int pchar; | |
2358 | WORD_LIST *list; | |
2359 | int quoted; | |
2360 | { | |
2361 | char *ret; | |
2362 | WORD_LIST *tlist; | |
2363 | ||
2364 | if (pchar == '*' && (quoted & Q_DOUBLE_QUOTES)) | |
2365 | { | |
2366 | tlist = quote_list (list); | |
2367 | word_list_remove_quoted_nulls (tlist); | |
2368 | ret = string_list_dollar_star (tlist); | |
2369 | } | |
2370 | else if (pchar == '*' && (quoted & Q_HERE_DOCUMENT)) | |
2371 | { | |
2372 | tlist = quote_list (list); | |
2373 | word_list_remove_quoted_nulls (tlist); | |
2374 | ret = string_list (tlist); | |
2375 | } | |
2376 | else if (pchar == '*') | |
2377 | { | |
2378 | /* Even when unquoted, string_list_dollar_star does the right thing | |
2379 | making sure that the first character of $IFS is used as the | |
2380 | separator. */ | |
2381 | ret = string_list_dollar_star (list); | |
2382 | } | |
2383 | else if (pchar == '@' && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) | |
2384 | /* We use string_list_dollar_at, but only if the string is quoted, since | |
2385 | that quotes the escapes if it's not, which we don't want. We could | |
2386 | use string_list (the old code did), but that doesn't do the right | |
2387 | thing if the first character of $IFS is not a space. We use | |
2388 | string_list_dollar_star if the string is unquoted so we make sure that | |
2389 | the elements of $@ are separated by the first character of $IFS for | |
2390 | later splitting. */ | |
2391 | ret = string_list_dollar_at (list, quoted); | |
2392 | else if (pchar == '@') | |
2393 | ret = string_list_dollar_star (list); | |
2394 | else | |
2395 | ret = string_list ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) ? quote_list (list) : list); | |
2396 | ||
2397 | return ret; | |
2398 | } | |
2399 | ||
726f6388 JA |
2400 | /* Return the list of words present in STRING. Separate the string into |
2401 | words at any of the characters found in SEPARATORS. If QUOTED is | |
2402 | non-zero then word in the list will have its quoted flag set, otherwise | |
2403 | the quoted flag is left as make_word () deemed fit. | |
2404 | ||
2405 | This obeys the P1003.2 word splitting semantics. If `separators' is | |
2406 | exactly <space><tab><newline>, then the splitting algorithm is that of | |
2407 | the Bourne shell, which treats any sequence of characters from `separators' | |
2408 | as a delimiter. If IFS is unset, which results in `separators' being set | |
2409 | to "", no splitting occurs. If separators has some other value, the | |
2410 | following rules are applied (`IFS white space' means zero or more | |
2411 | occurrences of <space>, <tab>, or <newline>, as long as those characters | |
2412 | are in `separators'): | |
2413 | ||
2414 | 1) IFS white space is ignored at the start and the end of the | |
2415 | string. | |
2416 | 2) Each occurrence of a character in `separators' that is not | |
2417 | IFS white space, along with any adjacent occurrences of | |
2418 | IFS white space delimits a field. | |
2419 | 3) Any nonzero-length sequence of IFS white space delimits a field. | |
2420 | */ | |
2421 | ||
2422 | /* BEWARE! list_string strips null arguments. Don't call it twice and | |
2423 | expect to have "" preserved! */ | |
2424 | ||
726f6388 JA |
2425 | /* This performs word splitting and quoted null character removal on |
2426 | STRING. */ | |
b80f6443 JA |
2427 | #define issep(c) \ |
2428 | (((separators)[0]) ? ((separators)[1] ? isifs(c) \ | |
2429 | : (c) == (separators)[0]) \ | |
2430 | : 0) | |
726f6388 JA |
2431 | |
2432 | WORD_LIST * | |
2433 | list_string (string, separators, quoted) | |
2434 | register char *string, *separators; | |
2435 | int quoted; | |
2436 | { | |
ccc6cda3 JA |
2437 | WORD_LIST *result; |
2438 | WORD_DESC *t; | |
2439 | char *current_word, *s; | |
3185942a | 2440 | int sindex, sh_style_split, whitesep, xflags; |
95732b49 | 2441 | size_t slen; |
726f6388 JA |
2442 | |
2443 | if (!string || !*string) | |
2444 | return ((WORD_LIST *)NULL); | |
2445 | ||
7117c2d2 JA |
2446 | sh_style_split = separators && separators[0] == ' ' && |
2447 | separators[1] == '\t' && | |
2448 | separators[2] == '\n' && | |
2449 | separators[3] == '\0'; | |
3185942a JA |
2450 | for (xflags = 0, s = ifs_value; s && *s; s++) |
2451 | { | |
2452 | if (*s == CTLESC) xflags |= SX_NOCTLESC; | |
2453 | else if (*s == CTLNUL) xflags |= SX_NOESCCTLNUL; | |
2454 | } | |
726f6388 | 2455 | |
95732b49 | 2456 | slen = 0; |
726f6388 JA |
2457 | /* Remove sequences of whitespace at the beginning of STRING, as |
2458 | long as those characters appear in IFS. Do not do this if | |
2459 | STRING is quoted or if there are no separator characters. */ | |
2460 | if (!quoted || !separators || !*separators) | |
2461 | { | |
2462 | for (s = string; *s && spctabnl (*s) && issep (*s); s++); | |
2463 | ||
2464 | if (!*s) | |
2465 | return ((WORD_LIST *)NULL); | |
2466 | ||
2467 | string = s; | |
2468 | } | |
2469 | ||
2470 | /* OK, now STRING points to a word that does not begin with white space. | |
2471 | The splitting algorithm is: | |
7117c2d2 JA |
2472 | extract a word, stopping at a separator |
2473 | skip sequences of spc, tab, or nl as long as they are separators | |
726f6388 | 2474 | This obeys the field splitting rules in Posix.2. */ |
95732b49 | 2475 | slen = (MB_CUR_MAX > 1) ? strlen (string) : 1; |
ccc6cda3 | 2476 | for (result = (WORD_LIST *)NULL, sindex = 0; string[sindex]; ) |
726f6388 | 2477 | { |
95732b49 JA |
2478 | /* Don't need string length in ADVANCE_CHAR or string_extract_verbatim |
2479 | unless multibyte chars are possible. */ | |
3185942a | 2480 | current_word = string_extract_verbatim (string, slen, &sindex, separators, xflags); |
ccc6cda3 | 2481 | if (current_word == 0) |
726f6388 JA |
2482 | break; |
2483 | ||
2484 | /* If we have a quoted empty string, add a quoted null argument. We | |
2485 | want to preserve the quoted null character iff this is a quoted | |
2486 | empty string; otherwise the quoted null characters are removed | |
2487 | below. */ | |
2488 | if (QUOTED_NULL (current_word)) | |
2489 | { | |
95732b49 | 2490 | t = alloc_word_desc (); |
726f6388 | 2491 | t->word = make_quoted_char ('\0'); |
95732b49 | 2492 | t->flags |= W_QUOTED|W_HASQUOTEDNULL; |
726f6388 JA |
2493 | result = make_word_list (t, result); |
2494 | } | |
ccc6cda3 | 2495 | else if (current_word[0] != '\0') |
726f6388 JA |
2496 | { |
2497 | /* If we have something, then add it regardless. However, | |
2498 | perform quoted null character removal on the current word. */ | |
2499 | remove_quoted_nulls (current_word); | |
cce855bc | 2500 | result = add_string_to_list (current_word, result); |
95732b49 | 2501 | result->word->flags &= ~W_HASQUOTEDNULL; /* just to be sure */ |
ccc6cda3 JA |
2502 | if (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) |
2503 | result->word->flags |= W_QUOTED; | |
726f6388 JA |
2504 | } |
2505 | ||
2506 | /* If we're not doing sequences of separators in the traditional | |
2507 | Bourne shell style, then add a quoted null argument. */ | |
726f6388 JA |
2508 | else if (!sh_style_split && !spctabnl (string[sindex])) |
2509 | { | |
95732b49 | 2510 | t = alloc_word_desc (); |
ccc6cda3 | 2511 | t->word = make_quoted_char ('\0'); |
95732b49 | 2512 | t->flags |= W_QUOTED|W_HASQUOTEDNULL; |
ccc6cda3 | 2513 | result = make_word_list (t, result); |
726f6388 JA |
2514 | } |
2515 | ||
2516 | free (current_word); | |
2517 | ||
28ef6c31 JA |
2518 | /* Note whether or not the separator is IFS whitespace, used later. */ |
2519 | whitesep = string[sindex] && spctabnl (string[sindex]); | |
2520 | ||
726f6388 JA |
2521 | /* Move past the current separator character. */ |
2522 | if (string[sindex]) | |
95732b49 JA |
2523 | { |
2524 | DECLARE_MBSTATE; | |
2525 | ADVANCE_CHAR (string, slen, sindex); | |
2526 | } | |
726f6388 JA |
2527 | |
2528 | /* Now skip sequences of space, tab, or newline characters if they are | |
2529 | in the list of separators. */ | |
2530 | while (string[sindex] && spctabnl (string[sindex]) && issep (string[sindex])) | |
2531 | sindex++; | |
28ef6c31 | 2532 | |
7117c2d2 JA |
2533 | /* If the first separator was IFS whitespace and the current character |
2534 | is a non-whitespace IFS character, it should be part of the current | |
2535 | field delimiter, not a separate delimiter that would result in an | |
2536 | empty field. Look at POSIX.2, 3.6.5, (3)(b). */ | |
28ef6c31 | 2537 | if (string[sindex] && whitesep && issep (string[sindex]) && !spctabnl (string[sindex])) |
95732b49 JA |
2538 | { |
2539 | sindex++; | |
2540 | /* An IFS character that is not IFS white space, along with any | |
2541 | adjacent IFS white space, shall delimit a field. (SUSv3) */ | |
0628567a | 2542 | while (string[sindex] && spctabnl (string[sindex]) && isifs (string[sindex])) |
95732b49 JA |
2543 | sindex++; |
2544 | } | |
726f6388 JA |
2545 | } |
2546 | return (REVERSE_LIST (result, WORD_LIST *)); | |
2547 | } | |
2548 | ||
2549 | /* Parse a single word from STRING, using SEPARATORS to separate fields. | |
2550 | ENDPTR is set to the first character after the word. This is used by | |
7117c2d2 JA |
2551 | the `read' builtin. This is never called with SEPARATORS != $IFS; |
2552 | it should be simplified. | |
2553 | ||
726f6388 JA |
2554 | XXX - this function is very similar to list_string; they should be |
2555 | combined - XXX */ | |
2556 | char * | |
2557 | get_word_from_string (stringp, separators, endptr) | |
2558 | char **stringp, *separators, **endptr; | |
2559 | { | |
2560 | register char *s; | |
2561 | char *current_word; | |
3185942a | 2562 | int sindex, sh_style_split, whitesep, xflags; |
95732b49 | 2563 | size_t slen; |
726f6388 JA |
2564 | |
2565 | if (!stringp || !*stringp || !**stringp) | |
2566 | return ((char *)NULL); | |
ccc6cda3 | 2567 | |
7117c2d2 JA |
2568 | sh_style_split = separators && separators[0] == ' ' && |
2569 | separators[1] == '\t' && | |
2570 | separators[2] == '\n' && | |
2571 | separators[3] == '\0'; | |
3185942a JA |
2572 | for (xflags = 0, s = ifs_value; s && *s; s++) |
2573 | { | |
2574 | if (*s == CTLESC) xflags |= SX_NOCTLESC; | |
2575 | if (*s == CTLNUL) xflags |= SX_NOESCCTLNUL; | |
2576 | } | |
726f6388 | 2577 | |
3185942a | 2578 | s = *stringp; |
95732b49 JA |
2579 | slen = 0; |
2580 | ||
726f6388 JA |
2581 | /* Remove sequences of whitespace at the beginning of STRING, as |
2582 | long as those characters appear in IFS. */ | |
2583 | if (sh_style_split || !separators || !*separators) | |
2584 | { | |
7117c2d2 | 2585 | for (; *s && spctabnl (*s) && isifs (*s); s++); |
726f6388 JA |
2586 | |
2587 | /* If the string is nothing but whitespace, update it and return. */ | |
2588 | if (!*s) | |
2589 | { | |
2590 | *stringp = s; | |
2591 | if (endptr) | |
2592 | *endptr = s; | |
2593 | return ((char *)NULL); | |
2594 | } | |
2595 | } | |
2596 | ||
2597 | /* OK, S points to a word that does not begin with white space. | |
2598 | Now extract a word, stopping at a separator, save a pointer to | |
2599 | the first character after the word, then skip sequences of spc, | |
2600 | tab, or nl as long as they are separators. | |
ccc6cda3 | 2601 | |
726f6388 JA |
2602 | This obeys the field splitting rules in Posix.2. */ |
2603 | sindex = 0; | |
95732b49 JA |
2604 | /* Don't need string length in ADVANCE_CHAR or string_extract_verbatim |
2605 | unless multibyte chars are possible. */ | |
2606 | slen = (MB_CUR_MAX > 1) ? strlen (s) : 1; | |
3185942a | 2607 | current_word = string_extract_verbatim (s, slen, &sindex, separators, xflags); |
726f6388 JA |
2608 | |
2609 | /* Set ENDPTR to the first character after the end of the word. */ | |
2610 | if (endptr) | |
2611 | *endptr = s + sindex; | |
2612 | ||
28ef6c31 JA |
2613 | /* Note whether or not the separator is IFS whitespace, used later. */ |
2614 | whitesep = s[sindex] && spctabnl (s[sindex]); | |
2615 | ||
726f6388 JA |
2616 | /* Move past the current separator character. */ |
2617 | if (s[sindex]) | |
95732b49 JA |
2618 | { |
2619 | DECLARE_MBSTATE; | |
2620 | ADVANCE_CHAR (s, slen, sindex); | |
2621 | } | |
726f6388 JA |
2622 | |
2623 | /* Now skip sequences of space, tab, or newline characters if they are | |
2624 | in the list of separators. */ | |
7117c2d2 | 2625 | while (s[sindex] && spctabnl (s[sindex]) && isifs (s[sindex])) |
726f6388 JA |
2626 | sindex++; |
2627 | ||
28ef6c31 JA |
2628 | /* If the first separator was IFS whitespace and the current character is |
2629 | a non-whitespace IFS character, it should be part of the current field | |
2630 | delimiter, not a separate delimiter that would result in an empty field. | |
2631 | Look at POSIX.2, 3.6.5, (3)(b). */ | |
7117c2d2 | 2632 | if (s[sindex] && whitesep && isifs (s[sindex]) && !spctabnl (s[sindex])) |
95732b49 JA |
2633 | { |
2634 | sindex++; | |
2635 | /* An IFS character that is not IFS white space, along with any adjacent | |
2636 | IFS white space, shall delimit a field. */ | |
2637 | while (s[sindex] && spctabnl (s[sindex]) && isifs (s[sindex])) | |
2638 | sindex++; | |
2639 | } | |
28ef6c31 | 2640 | |
726f6388 JA |
2641 | /* Update STRING to point to the next field. */ |
2642 | *stringp = s + sindex; | |
2643 | return (current_word); | |
2644 | } | |
2645 | ||
2646 | /* Remove IFS white space at the end of STRING. Start at the end | |
2647 | of the string and walk backwards until the beginning of the string | |
2648 | or we find a character that's not IFS white space and not CTLESC. | |
2649 | Only let CTLESC escape a white space character if SAW_ESCAPE is | |
2650 | non-zero. */ | |
2651 | char * | |
2652 | strip_trailing_ifs_whitespace (string, separators, saw_escape) | |
2653 | char *string, *separators; | |
2654 | int saw_escape; | |
2655 | { | |
2656 | char *s; | |
ccc6cda3 | 2657 | |
726f6388 | 2658 | s = string + STRLEN (string) - 1; |
7117c2d2 | 2659 | while (s > string && ((spctabnl (*s) && isifs (*s)) || |
726f6388 JA |
2660 | (saw_escape && *s == CTLESC && spctabnl (s[1])))) |
2661 | s--; | |
2662 | *++s = '\0'; | |
2663 | return string; | |
2664 | } | |
2665 | ||
bb70624e JA |
2666 | #if 0 |
2667 | /* UNUSED */ | |
2668 | /* Split STRING into words at whitespace. Obeys shell-style quoting with | |
2669 | backslashes, single and double quotes. */ | |
ccc6cda3 JA |
2670 | WORD_LIST * |
2671 | list_string_with_quotes (string) | |
2672 | char *string; | |
2673 | { | |
2674 | WORD_LIST *list; | |
2675 | char *token, *s; | |
7117c2d2 | 2676 | size_t s_len; |
ccc6cda3 JA |
2677 | int c, i, tokstart, len; |
2678 | ||
2679 | for (s = string; s && *s && spctabnl (*s); s++) | |
2680 | ; | |
2681 | if (s == 0 || *s == 0) | |
2682 | return ((WORD_LIST *)NULL); | |
2683 | ||
7117c2d2 | 2684 | s_len = strlen (s); |
ccc6cda3 JA |
2685 | tokstart = i = 0; |
2686 | list = (WORD_LIST *)NULL; | |
2687 | while (1) | |
2688 | { | |
2689 | c = s[i]; | |
2690 | if (c == '\\') | |
2691 | { | |
2692 | i++; | |
2693 | if (s[i]) | |
2694 | i++; | |
2695 | } | |
2696 | else if (c == '\'') | |
7117c2d2 | 2697 | i = skip_single_quoted (s, s_len, ++i); |
ccc6cda3 | 2698 | else if (c == '"') |
7117c2d2 | 2699 | i = skip_double_quoted (s, s_len, ++i); |
ccc6cda3 JA |
2700 | else if (c == 0 || spctabnl (c)) |
2701 | { | |
2702 | /* We have found the end of a token. Make a word out of it and | |
2703 | add it to the word list. */ | |
bb70624e | 2704 | token = substring (s, tokstart, i); |
cce855bc | 2705 | list = add_string_to_list (token, list); |
ccc6cda3 JA |
2706 | free (token); |
2707 | while (spctabnl (s[i])) | |
2708 | i++; | |
2709 | if (s[i]) | |
2710 | tokstart = i; | |
2711 | else | |
2712 | break; | |
2713 | } | |
2714 | else | |
2715 | i++; /* normal character */ | |
2716 | } | |
2717 | return (REVERSE_LIST (list, WORD_LIST *)); | |
2718 | } | |
bb70624e | 2719 | #endif |
d166f048 | 2720 | |
cce855bc JA |
2721 | /********************************************************/ |
2722 | /* */ | |
2723 | /* Functions to perform assignment statements */ | |
2724 | /* */ | |
2725 | /********************************************************/ | |
d166f048 | 2726 | |
95732b49 JA |
2727 | #if defined (ARRAY_VARS) |
2728 | static SHELL_VAR * | |
2729 | do_compound_assignment (name, value, flags) | |
2730 | char *name, *value; | |
2731 | int flags; | |
2732 | { | |
2733 | SHELL_VAR *v; | |
ac50fbac | 2734 | int mklocal, mkassoc, mkglobal; |
0628567a | 2735 | WORD_LIST *list; |
95732b49 JA |
2736 | |
2737 | mklocal = flags & ASS_MKLOCAL; | |
3185942a | 2738 | mkassoc = flags & ASS_MKASSOC; |
ac50fbac | 2739 | mkglobal = flags & ASS_MKGLOBAL; |
95732b49 JA |
2740 | |
2741 | if (mklocal && variable_context) | |
2742 | { | |
2743 | v = find_variable (name); | |
3185942a JA |
2744 | list = expand_compound_array_assignment (v, value, flags); |
2745 | if (mkassoc) | |
2746 | v = make_local_assoc_variable (name); | |
2747 | else if (v == 0 || (array_p (v) == 0 && assoc_p (v) == 0) || v->context != variable_context) | |
ac50fbac CR |
2748 | v = make_local_array_variable (name, 0); |
2749 | if (v) | |
2750 | assign_compound_array_list (v, list, flags); | |
2751 | } | |
2752 | /* In a function but forcing assignment in global context */ | |
2753 | else if (mkglobal && variable_context) | |
2754 | { | |
2755 | v = find_global_variable (name); | |
2756 | list = expand_compound_array_assignment (v, value, flags); | |
2757 | if (v == 0 && mkassoc) | |
2758 | v = make_new_assoc_variable (name); | |
2759 | else if (v && mkassoc && assoc_p (v) == 0) | |
2760 | v = convert_var_to_assoc (v); | |
2761 | else if (v == 0) | |
2762 | v = make_new_array_variable (name); | |
2763 | else if (v && mkassoc == 0 && array_p (v) == 0) | |
2764 | v = convert_var_to_array (v); | |
2765 | if (v) | |
2766 | assign_compound_array_list (v, list, flags); | |
95732b49 JA |
2767 | } |
2768 | else | |
2769 | v = assign_array_from_string (name, value, flags); | |
2770 | ||
2771 | return (v); | |
2772 | } | |
2773 | #endif | |
2774 | ||
726f6388 JA |
2775 | /* Given STRING, an assignment string, get the value of the right side |
2776 | of the `=', and bind it to the left side. If EXPAND is true, then | |
2777 | perform parameter expansion, command substitution, and arithmetic | |
2778 | expansion on the right-hand side. Perform tilde expansion in any | |
2779 | case. Do not perform word splitting on the result of expansion. */ | |
2780 | static int | |
95732b49 JA |
2781 | do_assignment_internal (word, expand) |
2782 | const WORD_DESC *word; | |
726f6388 JA |
2783 | int expand; |
2784 | { | |
495aee44 CR |
2785 | int offset, appendop, assign_list, aflags, retval; |
2786 | char *name, *value, *temp; | |
ccc6cda3 JA |
2787 | SHELL_VAR *entry; |
2788 | #if defined (ARRAY_VARS) | |
2789 | char *t; | |
b80f6443 | 2790 | int ni; |
ccc6cda3 | 2791 | #endif |
95732b49 | 2792 | const char *string; |
ccc6cda3 | 2793 | |
95732b49 JA |
2794 | if (word == 0 || word->word == 0) |
2795 | return 0; | |
2796 | ||
2797 | appendop = assign_list = aflags = 0; | |
2798 | string = word->word; | |
b80f6443 | 2799 | offset = assignment (string, 0); |
ccc6cda3 JA |
2800 | name = savestring (string); |
2801 | value = (char *)NULL; | |
726f6388 JA |
2802 | |
2803 | if (name[offset] == '=') | |
2804 | { | |
95732b49 JA |
2805 | if (name[offset - 1] == '+') |
2806 | { | |
2807 | appendop = 1; | |
2808 | name[offset - 1] = '\0'; | |
2809 | } | |
2810 | ||
2811 | name[offset] = 0; /* might need this set later */ | |
726f6388 JA |
2812 | temp = name + offset + 1; |
2813 | ||
ccc6cda3 | 2814 | #if defined (ARRAY_VARS) |
95732b49 | 2815 | if (expand && (word->flags & W_COMPASSIGN)) |
726f6388 | 2816 | { |
ccc6cda3 | 2817 | assign_list = ni = 1; |
95732b49 | 2818 | value = extract_array_assignment_list (temp, &ni); |
ccc6cda3 JA |
2819 | } |
2820 | else | |
2821 | #endif | |
ccc6cda3 | 2822 | if (expand && temp[0]) |
95732b49 | 2823 | value = expand_string_if_necessary (temp, 0, expand_string_assignment); |
726f6388 JA |
2824 | else |
2825 | value = savestring (temp); | |
2826 | } | |
2827 | ||
2828 | if (value == 0) | |
d166f048 | 2829 | { |
f73dda09 | 2830 | value = (char *)xmalloc (1); |
d166f048 JA |
2831 | value[0] = '\0'; |
2832 | } | |
726f6388 | 2833 | |
726f6388 | 2834 | if (echo_command_at_execute) |
95732b49 JA |
2835 | { |
2836 | if (appendop) | |
2837 | name[offset - 1] = '+'; | |
2838 | xtrace_print_assignment (name, value, assign_list, 1); | |
2839 | if (appendop) | |
2840 | name[offset - 1] = '\0'; | |
2841 | } | |
726f6388 | 2842 | |
d166f048 | 2843 | #define ASSIGN_RETURN(r) do { FREE (value); free (name); return (r); } while (0) |
ccc6cda3 | 2844 | |
95732b49 JA |
2845 | if (appendop) |
2846 | aflags |= ASS_APPEND; | |
2847 | ||
ccc6cda3 | 2848 | #if defined (ARRAY_VARS) |
0001803f | 2849 | if (t = mbschr (name, '[')) /*]*/ |
ccc6cda3 JA |
2850 | { |
2851 | if (assign_list) | |
2852 | { | |
b80f6443 | 2853 | report_error (_("%s: cannot assign list to array member"), name); |
ccc6cda3 JA |
2854 | ASSIGN_RETURN (0); |
2855 | } | |
95732b49 | 2856 | entry = assign_array_element (name, value, aflags); |
ccc6cda3 | 2857 | if (entry == 0) |
28ef6c31 | 2858 | ASSIGN_RETURN (0); |
ccc6cda3 JA |
2859 | } |
2860 | else if (assign_list) | |
95732b49 | 2861 | { |
6d41b715 | 2862 | if ((word->flags & W_ASSIGNARG) && (word->flags & W_ASSNGLOBAL) == 0) |
95732b49 | 2863 | aflags |= ASS_MKLOCAL; |
ac50fbac CR |
2864 | if ((word->flags & W_ASSIGNARG) && (word->flags & W_ASSNGLOBAL)) |
2865 | aflags |= ASS_MKGLOBAL; | |
3185942a JA |
2866 | if (word->flags & W_ASSIGNASSOC) |
2867 | aflags |= ASS_MKASSOC; | |
95732b49 JA |
2868 | entry = do_compound_assignment (name, value, aflags); |
2869 | } | |
ccc6cda3 JA |
2870 | else |
2871 | #endif /* ARRAY_VARS */ | |
95732b49 | 2872 | entry = bind_variable (name, value, aflags); |
ccc6cda3 | 2873 | |
726f6388 JA |
2874 | stupidly_hack_special_variables (name); |
2875 | ||
3185942a JA |
2876 | /* Return 1 if the assignment seems to have been performed correctly. */ |
2877 | if (entry == 0 || readonly_p (entry)) | |
2878 | retval = 0; /* assignment failure */ | |
2879 | else if (noassign_p (entry)) | |
2880 | { | |
2881 | last_command_exit_value = EXECUTION_FAILURE; | |
2882 | retval = 1; /* error status, but not assignment failure */ | |
2883 | } | |
2884 | else | |
2885 | retval = 1; | |
2886 | ||
2887 | if (entry && retval != 0 && noassign_p (entry) == 0) | |
2888 | VUNSETATTR (entry, att_invisible); | |
2889 | ||
2890 | ASSIGN_RETURN (retval); | |
726f6388 JA |
2891 | } |
2892 | ||
2893 | /* Perform the assignment statement in STRING, and expand the | |
95732b49 | 2894 | right side by doing tilde, command and parameter expansion. */ |
ccc6cda3 | 2895 | int |
726f6388 | 2896 | do_assignment (string) |
95732b49 | 2897 | char *string; |
726f6388 | 2898 | { |
95732b49 JA |
2899 | WORD_DESC td; |
2900 | ||
2901 | td.flags = W_ASSIGNMENT; | |
2902 | td.word = string; | |
2903 | ||
2904 | return do_assignment_internal (&td, 1); | |
2905 | } | |
2906 | ||
2907 | int | |
495aee44 | 2908 | do_word_assignment (word, flags) |
95732b49 | 2909 | WORD_DESC *word; |
495aee44 | 2910 | int flags; |
95732b49 JA |
2911 | { |
2912 | return do_assignment_internal (word, 1); | |
726f6388 JA |
2913 | } |
2914 | ||
2915 | /* Given STRING, an assignment string, get the value of the right side | |
95732b49 JA |
2916 | of the `=', and bind it to the left side. Do not perform any word |
2917 | expansions on the right hand side. */ | |
ccc6cda3 | 2918 | int |
726f6388 | 2919 | do_assignment_no_expand (string) |
95732b49 | 2920 | char *string; |
726f6388 | 2921 | { |
95732b49 JA |
2922 | WORD_DESC td; |
2923 | ||
2924 | td.flags = W_ASSIGNMENT; | |
2925 | td.word = string; | |
2926 | ||
2927 | return (do_assignment_internal (&td, 0)); | |
726f6388 JA |
2928 | } |
2929 | ||
cce855bc JA |
2930 | /*************************************************** |
2931 | * * | |
2932 | * Functions to manage the positional parameters * | |
2933 | * * | |
2934 | ***************************************************/ | |
726f6388 JA |
2935 | |
2936 | /* Return the word list that corresponds to `$*'. */ | |
2937 | WORD_LIST * | |
2938 | list_rest_of_args () | |
2939 | { | |
ccc6cda3 | 2940 | register WORD_LIST *list, *args; |
726f6388 JA |
2941 | int i; |
2942 | ||
2943 | /* Break out of the loop as soon as one of the dollar variables is null. */ | |
ccc6cda3 JA |
2944 | for (i = 1, list = (WORD_LIST *)NULL; i < 10 && dollar_vars[i]; i++) |
2945 | list = make_word_list (make_bare_word (dollar_vars[i]), list); | |
2946 | ||
2947 | for (args = rest_of_args; args; args = args->next) | |
2948 | list = make_word_list (make_bare_word (args->word->word), list); | |
726f6388 | 2949 | |
726f6388 JA |
2950 | return (REVERSE_LIST (list, WORD_LIST *)); |
2951 | } | |
2952 | ||
ccc6cda3 JA |
2953 | int |
2954 | number_of_args () | |
2955 | { | |
2956 | register WORD_LIST *list; | |
2957 | int n; | |
2958 | ||
2959 | for (n = 0; n < 9 && dollar_vars[n+1]; n++) | |
2960 | ; | |
2961 | for (list = rest_of_args; list; list = list->next) | |
2962 | n++; | |
2963 | return n; | |
2964 | } | |
2965 | ||
cce855bc JA |
2966 | /* Return the value of a positional parameter. This handles values > 10. */ |
2967 | char * | |
2968 | get_dollar_var_value (ind) | |
7117c2d2 | 2969 | intmax_t ind; |
cce855bc JA |
2970 | { |
2971 | char *temp; | |
2972 | WORD_LIST *p; | |
2973 | ||
2974 | if (ind < 10) | |
2975 | temp = dollar_vars[ind] ? savestring (dollar_vars[ind]) : (char *)NULL; | |
2976 | else /* We want something like ${11} */ | |
2977 | { | |
2978 | ind -= 10; | |
2979 | for (p = rest_of_args; p && ind--; p = p->next) | |
28ef6c31 | 2980 | ; |
cce855bc JA |
2981 | temp = p ? savestring (p->word->word) : (char *)NULL; |
2982 | } | |
2983 | return (temp); | |
2984 | } | |
2985 | ||
726f6388 JA |
2986 | /* Make a single large string out of the dollar digit variables, |
2987 | and the rest_of_args. If DOLLAR_STAR is 1, then obey the special | |
2988 | case of "$*" with respect to IFS. */ | |
2989 | char * | |
2990 | string_rest_of_args (dollar_star) | |
2991 | int dollar_star; | |
2992 | { | |
ccc6cda3 | 2993 | register WORD_LIST *list; |
726f6388 JA |
2994 | char *string; |
2995 | ||
ccc6cda3 | 2996 | list = list_rest_of_args (); |
726f6388 JA |
2997 | string = dollar_star ? string_list_dollar_star (list) : string_list (list); |
2998 | dispose_words (list); | |
2999 | return (string); | |
3000 | } | |
3001 | ||
cce855bc JA |
3002 | /* Return a string containing the positional parameters from START to |
3003 | END, inclusive. If STRING[0] == '*', we obey the rules for $*, | |
7117c2d2 JA |
3004 | which only makes a difference if QUOTED is non-zero. If QUOTED includes |
3005 | Q_HERE_DOCUMENT or Q_DOUBLE_QUOTES, this returns a quoted list, otherwise | |
3006 | no quoting chars are added. */ | |
cce855bc JA |
3007 | static char * |
3008 | pos_params (string, start, end, quoted) | |
3009 | char *string; | |
3010 | int start, end, quoted; | |
726f6388 | 3011 | { |
cce855bc JA |
3012 | WORD_LIST *save, *params, *h, *t; |
3013 | char *ret; | |
3014 | int i; | |
726f6388 | 3015 | |
bb70624e JA |
3016 | /* see if we can short-circuit. if start == end, we want 0 parameters. */ |
3017 | if (start == end) | |
3018 | return ((char *)NULL); | |
3019 | ||
cce855bc JA |
3020 | save = params = list_rest_of_args (); |
3021 | if (save == 0) | |
3022 | return ((char *)NULL); | |
3023 | ||
3185942a JA |
3024 | if (start == 0) /* handle ${@:0[:x]} specially */ |
3025 | { | |
3026 | t = make_word_list (make_word (dollar_vars[0]), params); | |
3027 | save = params = t; | |
3028 | } | |
3029 | ||
0001803f | 3030 | for (i = start ? 1 : 0; params && i < start; i++) |
cce855bc JA |
3031 | params = params->next; |
3032 | if (params == 0) | |
3033 | return ((char *)NULL); | |
3034 | for (h = t = params; params && i < end; i++) | |
d166f048 | 3035 | { |
cce855bc JA |
3036 | t = params; |
3037 | params = params->next; | |
d166f048 | 3038 | } |
726f6388 | 3039 | |
cce855bc | 3040 | t->next = (WORD_LIST *)NULL; |
3185942a JA |
3041 | |
3042 | ret = string_list_pos_params (string[0], h, quoted); | |
3043 | ||
bb70624e JA |
3044 | if (t != params) |
3045 | t->next = params; | |
726f6388 | 3046 | |
cce855bc JA |
3047 | dispose_words (save); |
3048 | return (ret); | |
3049 | } | |
3050 | ||
3051 | /******************************************************************/ | |
3052 | /* */ | |
3053 | /* Functions to expand strings to strings or WORD_LISTs */ | |
3054 | /* */ | |
3055 | /******************************************************************/ | |
3056 | ||
3057 | #if defined (PROCESS_SUBSTITUTION) | |
95732b49 | 3058 | #define EXP_CHAR(s) (s == '$' || s == '`' || s == '<' || s == '>' || s == CTLESC || s == '~') |
cce855bc | 3059 | #else |
95732b49 | 3060 | #define EXP_CHAR(s) (s == '$' || s == '`' || s == CTLESC || s == '~') |
cce855bc JA |
3061 | #endif |
3062 | ||
3063 | /* If there are any characters in STRING that require full expansion, | |
3064 | then call FUNC to expand STRING; otherwise just perform quote | |
3065 | removal if necessary. This returns a new string. */ | |
3066 | static char * | |
f73dda09 | 3067 | expand_string_if_necessary (string, quoted, func) |
cce855bc JA |
3068 | char *string; |
3069 | int quoted; | |
f73dda09 | 3070 | EXPFUNC *func; |
cce855bc JA |
3071 | { |
3072 | WORD_LIST *list; | |
7117c2d2 | 3073 | size_t slen; |
cce855bc JA |
3074 | int i, saw_quote; |
3075 | char *ret; | |
7117c2d2 | 3076 | DECLARE_MBSTATE; |
cce855bc | 3077 | |
95732b49 JA |
3078 | /* Don't need string length for ADVANCE_CHAR unless multibyte chars possible. */ |
3079 | slen = (MB_CUR_MAX > 1) ? strlen (string) : 0; | |
7117c2d2 JA |
3080 | i = saw_quote = 0; |
3081 | while (string[i]) | |
cce855bc JA |
3082 | { |
3083 | if (EXP_CHAR (string[i])) | |
3084 | break; | |
3085 | else if (string[i] == '\'' || string[i] == '\\' || string[i] == '"') | |
3086 | saw_quote = 1; | |
7117c2d2 | 3087 | ADVANCE_CHAR (string, slen, i); |
cce855bc JA |
3088 | } |
3089 | ||
3090 | if (string[i]) | |
3091 | { | |
3092 | list = (*func) (string, quoted); | |
3093 | if (list) | |
3094 | { | |
3095 | ret = string_list (list); | |
3096 | dispose_words (list); | |
3097 | } | |
3098 | else | |
3099 | ret = (char *)NULL; | |
3100 | } | |
3101 | else if (saw_quote && ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) == 0)) | |
3102 | ret = string_quote_removal (string, quoted); | |
3103 | else | |
3104 | ret = savestring (string); | |
7117c2d2 | 3105 | |
cce855bc JA |
3106 | return ret; |
3107 | } | |
3108 | ||
3109 | static inline char * | |
f73dda09 | 3110 | expand_string_to_string_internal (string, quoted, func) |
cce855bc JA |
3111 | char *string; |
3112 | int quoted; | |
f73dda09 | 3113 | EXPFUNC *func; |
cce855bc JA |
3114 | { |
3115 | WORD_LIST *list; | |
3116 | char *ret; | |
3117 | ||
3118 | if (string == 0 || *string == '\0') | |
3119 | return ((char *)NULL); | |
3120 | ||
3121 | list = (*func) (string, quoted); | |
3122 | if (list) | |
3123 | { | |
3124 | ret = string_list (list); | |
3125 | dispose_words (list); | |
3126 | } | |
3127 | else | |
3128 | ret = (char *)NULL; | |
3129 | ||
3130 | return (ret); | |
3131 | } | |
3132 | ||
f73dda09 JA |
3133 | char * |
3134 | expand_string_to_string (string, quoted) | |
3135 | char *string; | |
3136 | int quoted; | |
3137 | { | |
3138 | return (expand_string_to_string_internal (string, quoted, expand_string)); | |
3139 | } | |
3140 | ||
3141 | char * | |
3142 | expand_string_unsplit_to_string (string, quoted) | |
3143 | char *string; | |
3144 | int quoted; | |
3145 | { | |
3146 | return (expand_string_to_string_internal (string, quoted, expand_string_unsplit)); | |
3147 | } | |
3148 | ||
95732b49 JA |
3149 | char * |
3150 | expand_assignment_string_to_string (string, quoted) | |
3151 | char *string; | |
3152 | int quoted; | |
3153 | { | |
3154 | return (expand_string_to_string_internal (string, quoted, expand_string_assignment)); | |
3155 | } | |
3156 | ||
0628567a JA |
3157 | char * |
3158 | expand_arith_string (string, quoted) | |
3159 | char *string; | |
3185942a | 3160 | int quoted; |
0628567a | 3161 | { |
ac50fbac CR |
3162 | WORD_DESC td; |
3163 | WORD_LIST *list, *tlist; | |
3164 | size_t slen; | |
3165 | int i, saw_quote; | |
3166 | char *ret; | |
3167 | DECLARE_MBSTATE; | |
3168 | ||
3169 | /* Don't need string length for ADVANCE_CHAR unless multibyte chars possible. */ | |
3170 | slen = (MB_CUR_MAX > 1) ? strlen (string) : 0; | |
3171 | i = saw_quote = 0; | |
3172 | while (string[i]) | |
3173 | { | |
3174 | if (EXP_CHAR (string[i])) | |
3175 | break; | |
3176 | else if (string[i] == '\'' || string[i] == '\\' || string[i] == '"') | |
3177 | saw_quote = 1; | |
3178 | ADVANCE_CHAR (string, slen, i); | |
3179 | } | |
3180 | ||
3181 | if (string[i]) | |
3182 | { | |
3183 | /* This is expanded version of expand_string_internal as it's called by | |
3184 | expand_string_leave_quoted */ | |
3185 | td.flags = W_NOPROCSUB; /* don't want process substitution */ | |
3186 | td.word = savestring (string); | |
3187 | list = call_expand_word_internal (&td, quoted, 0, (int *)NULL, (int *)NULL); | |
3188 | /* This takes care of the calls from expand_string_leave_quoted and | |
3189 | expand_string */ | |
3190 | if (list) | |
3191 | { | |
3192 | tlist = word_list_split (list); | |
3193 | dispose_words (list); | |
3194 | list = tlist; | |
3195 | if (list) | |
3196 | dequote_list (list); | |
3197 | } | |
3198 | /* This comes from expand_string_if_necessary */ | |
3199 | if (list) | |
3200 | { | |
3201 | ret = string_list (list); | |
3202 | dispose_words (list); | |
3203 | } | |
3204 | else | |
3205 | ret = (char *)NULL; | |
3206 | FREE (td.word); | |
3207 | } | |
3208 | else if (saw_quote && ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) == 0)) | |
3209 | ret = string_quote_removal (string, quoted); | |
3210 | else | |
3211 | ret = savestring (string); | |
3212 | ||
3213 | return ret; | |
0628567a JA |
3214 | } |
3215 | ||
cce855bc JA |
3216 | #if defined (COND_COMMAND) |
3217 | /* Just remove backslashes in STRING. Returns a new string. */ | |
3218 | char * | |
3219 | remove_backslashes (string) | |
3220 | char *string; | |
3221 | { | |
3222 | char *r, *ret, *s; | |
3223 | ||
f73dda09 | 3224 | r = ret = (char *)xmalloc (strlen (string) + 1); |
cce855bc JA |
3225 | for (s = string; s && *s; ) |
3226 | { | |
3227 | if (*s == '\\') | |
28ef6c31 | 3228 | s++; |
cce855bc | 3229 | if (*s == 0) |
28ef6c31 | 3230 | break; |
cce855bc JA |
3231 | *r++ = *s++; |
3232 | } | |
3233 | *r = '\0'; | |
3234 | return ret; | |
3235 | } | |
3236 | ||
3237 | /* This needs better error handling. */ | |
3238 | /* Expand W for use as an argument to a unary or binary operator in a | |
f1be666c | 3239 | [[...]] expression. If SPECIAL is 1, this is the rhs argument |
cce855bc | 3240 | to the != or == operator, and should be treated as a pattern. In |
f1be666c JA |
3241 | this case, we quote the string specially for the globbing code. If |
3242 | SPECIAL is 2, this is an rhs argument for the =~ operator, and should | |
3243 | be quoted appropriately for regcomp/regexec. The caller is responsible | |
3244 | for removing the backslashes if the unquoted word is needed later. */ | |
cce855bc JA |
3245 | char * |
3246 | cond_expand_word (w, special) | |
3247 | WORD_DESC *w; | |
3248 | int special; | |
3249 | { | |
3250 | char *r, *p; | |
3251 | WORD_LIST *l; | |
f1be666c | 3252 | int qflags; |
cce855bc JA |
3253 | |
3254 | if (w->word == 0 || w->word[0] == '\0') | |
3255 | return ((char *)NULL); | |
3256 | ||
3b34f6e6 | 3257 | expand_no_split_dollar_star = 1; |
0001803f | 3258 | w->flags |= W_NOSPLIT2; |
b72432fd | 3259 | l = call_expand_word_internal (w, 0, 0, (int *)0, (int *)0); |
3b34f6e6 | 3260 | expand_no_split_dollar_star = 0; |
cce855bc JA |
3261 | if (l) |
3262 | { | |
ac50fbac | 3263 | if (special == 0) /* LHS */ |
cce855bc JA |
3264 | { |
3265 | dequote_list (l); | |
3266 | r = string_list (l); | |
3267 | } | |
3268 | else | |
28ef6c31 | 3269 | { |
ac50fbac CR |
3270 | /* Need to figure out whether or not we should call dequote_escapes |
3271 | or a new dequote_ctlnul function here, and under what | |
3272 | circumstances. */ | |
f1be666c JA |
3273 | qflags = QGLOB_CVTNULL; |
3274 | if (special == 2) | |
3275 | qflags |= QGLOB_REGEXP; | |
28ef6c31 | 3276 | p = string_list (l); |
f1be666c | 3277 | r = quote_string_for_globbing (p, qflags); |
28ef6c31 JA |
3278 | free (p); |
3279 | } | |
cce855bc JA |
3280 | dispose_words (l); |
3281 | } | |
3282 | else | |
3283 | r = (char *)NULL; | |
3284 | ||
3285 | return r; | |
3286 | } | |
3287 | #endif | |
3288 | ||
3289 | /* Call expand_word_internal to expand W and handle error returns. | |
3290 | A convenience function for functions that don't want to handle | |
3291 | any errors or free any memory before aborting. */ | |
3292 | static WORD_LIST * | |
b72432fd | 3293 | call_expand_word_internal (w, q, i, c, e) |
cce855bc | 3294 | WORD_DESC *w; |
b72432fd | 3295 | int q, i, *c, *e; |
cce855bc JA |
3296 | { |
3297 | WORD_LIST *result; | |
3298 | ||
b72432fd | 3299 | result = expand_word_internal (w, q, i, c, e); |
bb70624e | 3300 | if (result == &expand_word_error || result == &expand_word_fatal) |
cce855bc JA |
3301 | { |
3302 | /* By convention, each time this error is returned, w->word has | |
bb70624e JA |
3303 | already been freed (it sometimes may not be in the fatal case, |
3304 | but that doesn't result in a memory leak because we're going | |
3305 | to exit in most cases). */ | |
cce855bc | 3306 | w->word = (char *)NULL; |
28ef6c31 | 3307 | last_command_exit_value = EXECUTION_FAILURE; |
b80f6443 | 3308 | exp_jump_to_top_level ((result == &expand_word_error) ? DISCARD : FORCE_EOF); |
cce855bc | 3309 | /* NOTREACHED */ |
ac50fbac | 3310 | return (NULL); |
cce855bc | 3311 | } |
cce855bc JA |
3312 | else |
3313 | return (result); | |
3314 | } | |
3315 | ||
3316 | /* Perform parameter expansion, command substitution, and arithmetic | |
ac50fbac CR |
3317 | expansion on STRING, as if it were a word. Leave the result quoted. |
3318 | Since this does not perform word splitting, it leaves quoted nulls | |
3319 | in the result. */ | |
cce855bc JA |
3320 | static WORD_LIST * |
3321 | expand_string_internal (string, quoted) | |
3322 | char *string; | |
3323 | int quoted; | |
3324 | { | |
3325 | WORD_DESC td; | |
3326 | WORD_LIST *tresult; | |
3327 | ||
3328 | if (string == 0 || *string == 0) | |
3329 | return ((WORD_LIST *)NULL); | |
3330 | ||
28ef6c31 JA |
3331 | td.flags = 0; |
3332 | td.word = savestring (string); | |
3333 | ||
b72432fd | 3334 | tresult = call_expand_word_internal (&td, quoted, 0, (int *)NULL, (int *)NULL); |
28ef6c31 JA |
3335 | |
3336 | FREE (td.word); | |
cce855bc | 3337 | return (tresult); |
726f6388 JA |
3338 | } |
3339 | ||
3340 | /* Expand STRING by performing parameter expansion, command substitution, | |
3341 | and arithmetic expansion. Dequote the resulting WORD_LIST before | |
3342 | returning it, but do not perform word splitting. The call to | |
3343 | remove_quoted_nulls () is in here because word splitting normally | |
3344 | takes care of quote removal. */ | |
3345 | WORD_LIST * | |
3346 | expand_string_unsplit (string, quoted) | |
3347 | char *string; | |
3348 | int quoted; | |
3349 | { | |
3350 | WORD_LIST *value; | |
3351 | ||
28ef6c31 | 3352 | if (string == 0 || *string == '\0') |
726f6388 JA |
3353 | return ((WORD_LIST *)NULL); |
3354 | ||
28ef6c31 | 3355 | expand_no_split_dollar_star = 1; |
726f6388 | 3356 | value = expand_string_internal (string, quoted); |
28ef6c31 JA |
3357 | expand_no_split_dollar_star = 0; |
3358 | ||
726f6388 JA |
3359 | if (value) |
3360 | { | |
3361 | if (value->word) | |
95732b49 JA |
3362 | { |
3363 | remove_quoted_nulls (value->word->word); | |
3364 | value->word->flags &= ~W_HASQUOTEDNULL; | |
3365 | } | |
3366 | dequote_list (value); | |
3367 | } | |
3368 | return (value); | |
3369 | } | |
3370 | ||
3371 | /* Expand the rhs of an assignment statement */ | |
3372 | WORD_LIST * | |
3373 | expand_string_assignment (string, quoted) | |
3374 | char *string; | |
3375 | int quoted; | |
3376 | { | |
3377 | WORD_DESC td; | |
3378 | WORD_LIST *value; | |
3379 | ||
3380 | if (string == 0 || *string == '\0') | |
3381 | return ((WORD_LIST *)NULL); | |
3382 | ||
3383 | expand_no_split_dollar_star = 1; | |
3384 | ||
3385 | td.flags = W_ASSIGNRHS; | |
3386 | td.word = savestring (string); | |
3387 | value = call_expand_word_internal (&td, quoted, 0, (int *)NULL, (int *)NULL); | |
3388 | FREE (td.word); | |
3389 | ||
3390 | expand_no_split_dollar_star = 0; | |
3391 | ||
3392 | if (value) | |
3393 | { | |
3394 | if (value->word) | |
3395 | { | |
3396 | remove_quoted_nulls (value->word->word); | |
3397 | value->word->flags &= ~W_HASQUOTEDNULL; | |
3398 | } | |
726f6388 JA |
3399 | dequote_list (value); |
3400 | } | |
3401 | return (value); | |
3402 | } | |
3403 | ||
bb70624e JA |
3404 | |
3405 | /* Expand one of the PS? prompt strings. This is a sort of combination of | |
3406 | expand_string_unsplit and expand_string_internal, but returns the | |
3407 | passed string when an error occurs. Might want to trap other calls | |
3408 | to jump_to_top_level here so we don't endlessly loop. */ | |
3409 | WORD_LIST * | |
f1be666c | 3410 | expand_prompt_string (string, quoted, wflags) |
bb70624e JA |
3411 | char *string; |
3412 | int quoted; | |
f1be666c | 3413 | int wflags; |
bb70624e JA |
3414 | { |
3415 | WORD_LIST *value; | |
3416 | WORD_DESC td; | |
3417 | ||
3418 | if (string == 0 || *string == 0) | |
3419 | return ((WORD_LIST *)NULL); | |
3420 | ||
f1be666c | 3421 | td.flags = wflags; |
bb70624e | 3422 | td.word = savestring (string); |
28ef6c31 JA |
3423 | |
3424 | no_longjmp_on_fatal_error = 1; | |
bb70624e | 3425 | value = expand_word_internal (&td, quoted, 0, (int *)NULL, (int *)NULL); |
28ef6c31 JA |
3426 | no_longjmp_on_fatal_error = 0; |
3427 | ||
bb70624e JA |
3428 | if (value == &expand_word_error || value == &expand_word_fatal) |
3429 | { | |
3430 | value = make_word_list (make_bare_word (string), (WORD_LIST *)NULL); | |
3431 | return value; | |
3432 | } | |
3433 | FREE (td.word); | |
3434 | if (value) | |
3435 | { | |
3436 | if (value->word) | |
95732b49 JA |
3437 | { |
3438 | remove_quoted_nulls (value->word->word); | |
3439 | value->word->flags &= ~W_HASQUOTEDNULL; | |
3440 | } | |
bb70624e JA |
3441 | dequote_list (value); |
3442 | } | |
3443 | return (value); | |
3444 | } | |
3445 | ||
726f6388 JA |
3446 | /* Expand STRING just as if you were expanding a word, but do not dequote |
3447 | the resultant WORD_LIST. This is called only from within this file, | |
3448 | and is used to correctly preserve quoted characters when expanding | |
3449 | things like ${1+"$@"}. This does parameter expansion, command | |
b72432fd | 3450 | substitution, arithmetic expansion, and word splitting. */ |
726f6388 JA |
3451 | static WORD_LIST * |
3452 | expand_string_leave_quoted (string, quoted) | |
3453 | char *string; | |
3454 | int quoted; | |
3455 | { | |
3456 | WORD_LIST *tlist; | |
3457 | WORD_LIST *tresult; | |
3458 | ||
ccc6cda3 | 3459 | if (string == 0 || *string == '\0') |
726f6388 JA |
3460 | return ((WORD_LIST *)NULL); |
3461 | ||
3462 | tlist = expand_string_internal (string, quoted); | |
3463 | ||
3464 | if (tlist) | |
3465 | { | |
3466 | tresult = word_list_split (tlist); | |
3467 | dispose_words (tlist); | |
3468 | return (tresult); | |
3469 | } | |
3470 | return ((WORD_LIST *)NULL); | |
3471 | } | |
3472 | ||
ccc6cda3 JA |
3473 | /* This does not perform word splitting or dequote the WORD_LIST |
3474 | it returns. */ | |
3475 | static WORD_LIST * | |
3476 | expand_string_for_rhs (string, quoted, dollar_at_p, has_dollar_at) | |
3477 | char *string; | |
3478 | int quoted, *dollar_at_p, *has_dollar_at; | |
3479 | { | |
3480 | WORD_DESC td; | |
3481 | WORD_LIST *tresult; | |
3482 | ||
3483 | if (string == 0 || *string == '\0') | |
3484 | return (WORD_LIST *)NULL; | |
3485 | ||
aeb26a67 | 3486 | td.flags = W_NOSPLIT2; /* no splitting, remove "" and '' */ |
ccc6cda3 | 3487 | td.word = string; |
b72432fd | 3488 | tresult = call_expand_word_internal (&td, quoted, 1, dollar_at_p, has_dollar_at); |
ccc6cda3 JA |
3489 | return (tresult); |
3490 | } | |
3491 | ||
726f6388 JA |
3492 | /* Expand STRING just as if you were expanding a word. This also returns |
3493 | a list of words. Note that filename globbing is *NOT* done for word | |
3494 | or string expansion, just when the shell is expanding a command. This | |
3495 | does parameter expansion, command substitution, arithmetic expansion, | |
3496 | and word splitting. Dequote the resultant WORD_LIST before returning. */ | |
3497 | WORD_LIST * | |
3498 | expand_string (string, quoted) | |
3499 | char *string; | |
3500 | int quoted; | |
3501 | { | |
3502 | WORD_LIST *result; | |
3503 | ||
28ef6c31 | 3504 | if (string == 0 || *string == '\0') |
726f6388 JA |
3505 | return ((WORD_LIST *)NULL); |
3506 | ||
3507 | result = expand_string_leave_quoted (string, quoted); | |
ccc6cda3 | 3508 | return (result ? dequote_list (result) : result); |
726f6388 JA |
3509 | } |
3510 | ||
3511 | /*************************************************** | |
3512 | * * | |
3513 | * Functions to handle quoting chars * | |
3514 | * * | |
3515 | ***************************************************/ | |
3516 | ||
cce855bc JA |
3517 | /* Conventions: |
3518 | ||
3519 | A string with s[0] == CTLNUL && s[1] == 0 is a quoted null string. | |
3520 | The parser passes CTLNUL as CTLESC CTLNUL. */ | |
3521 | ||
cce855bc JA |
3522 | /* Quote escape characters in string s, but no other characters. This is |
3523 | used to protect CTLESC and CTLNUL in variable values from the rest of | |
3185942a JA |
3524 | the word expansion process after the variable is expanded (word splitting |
3525 | and filename generation). If IFS is null, we quote spaces as well, just | |
3526 | in case we split on spaces later (in the case of unquoted $@, we will | |
3527 | eventually attempt to split the entire word on spaces). Corresponding | |
3528 | code exists in dequote_escapes. Even if we don't end up splitting on | |
3529 | spaces, quoting spaces is not a problem. This should never be called on | |
3530 | a string that is quoted with single or double quotes or part of a here | |
3531 | document (effectively double-quoted). */ | |
f73dda09 | 3532 | char * |
cce855bc JA |
3533 | quote_escapes (string) |
3534 | char *string; | |
3535 | { | |
3536 | register char *s, *t; | |
7117c2d2 JA |
3537 | size_t slen; |
3538 | char *result, *send; | |
3185942a | 3539 | int quote_spaces, skip_ctlesc, skip_ctlnul; |
7117c2d2 | 3540 | DECLARE_MBSTATE; |
cce855bc | 3541 | |
7117c2d2 JA |
3542 | slen = strlen (string); |
3543 | send = string + slen; | |
3544 | ||
f1be666c | 3545 | quote_spaces = (ifs_value && *ifs_value == 0); |
3185942a JA |
3546 | |
3547 | for (skip_ctlesc = skip_ctlnul = 0, s = ifs_value; s && *s; s++) | |
3548 | skip_ctlesc |= *s == CTLESC, skip_ctlnul |= *s == CTLNUL; | |
3549 | ||
7117c2d2 JA |
3550 | t = result = (char *)xmalloc ((slen * 2) + 1); |
3551 | s = string; | |
3552 | ||
3553 | while (*s) | |
cce855bc | 3554 | { |
3185942a | 3555 | if ((skip_ctlesc == 0 && *s == CTLESC) || (skip_ctlnul == 0 && *s == CTLNUL) || (quote_spaces && *s == ' ')) |
cce855bc | 3556 | *t++ = CTLESC; |
7117c2d2 | 3557 | COPY_CHAR_P (t, s, send); |
cce855bc JA |
3558 | } |
3559 | *t = '\0'; | |
ac50fbac | 3560 | |
cce855bc JA |
3561 | return (result); |
3562 | } | |
3563 | ||
3564 | static WORD_LIST * | |
3565 | list_quote_escapes (list) | |
3566 | WORD_LIST *list; | |
3567 | { | |
3568 | register WORD_LIST *w; | |
3569 | char *t; | |
3570 | ||
3571 | for (w = list; w; w = w->next) | |
3572 | { | |
3573 | t = w->word->word; | |
3574 | w->word->word = quote_escapes (t); | |
3575 | free (t); | |
3576 | } | |
3577 | return list; | |
3578 | } | |
3579 | ||
7117c2d2 JA |
3580 | /* Inverse of quote_escapes; remove CTLESC protecting CTLESC or CTLNUL. |
3581 | ||
3582 | The parser passes us CTLESC as CTLESC CTLESC and CTLNUL as CTLESC CTLNUL. | |
3583 | This is necessary to make unquoted CTLESC and CTLNUL characters in the | |
3584 | data stream pass through properly. | |
3585 | ||
3586 | We need to remove doubled CTLESC characters inside quoted strings before | |
3587 | quoting the entire string, so we do not double the number of CTLESC | |
3588 | characters. | |
3589 | ||
3590 | Also used by parts of the pattern substitution code. */ | |
3185942a | 3591 | char * |
cce855bc JA |
3592 | dequote_escapes (string) |
3593 | char *string; | |
3594 | { | |
3185942a | 3595 | register char *s, *t, *s1; |
7117c2d2 JA |
3596 | size_t slen; |
3597 | char *result, *send; | |
f1be666c | 3598 | int quote_spaces; |
7117c2d2 | 3599 | DECLARE_MBSTATE; |
cce855bc | 3600 | |
7117c2d2 JA |
3601 | if (string == 0) |
3602 | return string; | |
3603 | ||
3604 | slen = strlen (string); | |
3605 | send = string + slen; | |
3606 | ||
3607 | t = result = (char *)xmalloc (slen + 1); | |
7117c2d2 JA |
3608 | |
3609 | if (strchr (string, CTLESC) == 0) | |
3185942a | 3610 | return (strcpy (result, string)); |
7117c2d2 | 3611 | |
f1be666c | 3612 | quote_spaces = (ifs_value && *ifs_value == 0); |
3185942a JA |
3613 | |
3614 | s = string; | |
7117c2d2 | 3615 | while (*s) |
cce855bc | 3616 | { |
f1be666c | 3617 | if (*s == CTLESC && (s[1] == CTLESC || s[1] == CTLNUL || (quote_spaces && s[1] == ' '))) |
cce855bc JA |
3618 | { |
3619 | s++; | |
3620 | if (*s == '\0') | |
3621 | break; | |
3622 | } | |
7117c2d2 | 3623 | COPY_CHAR_P (t, s, send); |
cce855bc JA |
3624 | } |
3625 | *t = '\0'; | |
ac50fbac | 3626 | |
cce855bc JA |
3627 | return result; |
3628 | } | |
726f6388 | 3629 | |
ac50fbac CR |
3630 | static WORD_LIST * |
3631 | list_dequote_escapes (list) | |
3632 | WORD_LIST *list; | |
3633 | { | |
3634 | register WORD_LIST *w; | |
3635 | char *t; | |
3636 | ||
3637 | for (w = list; w; w = w->next) | |
3638 | { | |
3639 | t = w->word->word; | |
3640 | w->word->word = dequote_escapes (t); | |
3641 | free (t); | |
3642 | } | |
3643 | return list; | |
3644 | } | |
3645 | ||
0628567a JA |
3646 | /* Return a new string with the quoted representation of character C. |
3647 | This turns "" into QUOTED_NULL, so the W_HASQUOTEDNULL flag needs to be | |
3648 | set in any resultant WORD_DESC where this value is the word. */ | |
726f6388 JA |
3649 | static char * |
3650 | make_quoted_char (c) | |
3651 | int c; | |
3652 | { | |
3653 | char *temp; | |
3654 | ||
f73dda09 | 3655 | temp = (char *)xmalloc (3); |
726f6388 JA |
3656 | if (c == 0) |
3657 | { | |
3658 | temp[0] = CTLNUL; | |
3659 | temp[1] = '\0'; | |
3660 | } | |
3661 | else | |
3662 | { | |
3663 | temp[0] = CTLESC; | |
3664 | temp[1] = c; | |
3665 | temp[2] = '\0'; | |
3666 | } | |
3667 | return (temp); | |
3668 | } | |
3669 | ||
0628567a JA |
3670 | /* Quote STRING, returning a new string. This turns "" into QUOTED_NULL, so |
3671 | the W_HASQUOTEDNULL flag needs to be set in any resultant WORD_DESC where | |
3672 | this value is the word. */ | |
ccc6cda3 | 3673 | char * |
726f6388 JA |
3674 | quote_string (string) |
3675 | char *string; | |
3676 | { | |
ccc6cda3 | 3677 | register char *t; |
7117c2d2 JA |
3678 | size_t slen; |
3679 | char *result, *send; | |
726f6388 | 3680 | |
ccc6cda3 | 3681 | if (*string == 0) |
726f6388 | 3682 | { |
f73dda09 | 3683 | result = (char *)xmalloc (2); |
726f6388 JA |
3684 | result[0] = CTLNUL; |
3685 | result[1] = '\0'; | |
3686 | } | |
3687 | else | |
3688 | { | |
7117c2d2 | 3689 | DECLARE_MBSTATE; |
726f6388 | 3690 | |
7117c2d2 JA |
3691 | slen = strlen (string); |
3692 | send = string + slen; | |
3693 | ||
3694 | result = (char *)xmalloc ((slen * 2) + 1); | |
3695 | ||
3696 | for (t = result; string < send; ) | |
726f6388 JA |
3697 | { |
3698 | *t++ = CTLESC; | |
7117c2d2 | 3699 | COPY_CHAR_P (t, string, send); |
726f6388 JA |
3700 | } |
3701 | *t = '\0'; | |
3702 | } | |
3703 | return (result); | |
3704 | } | |
3705 | ||
0628567a | 3706 | /* De-quote quoted characters in STRING. */ |
726f6388 JA |
3707 | char * |
3708 | dequote_string (string) | |
3709 | char *string; | |
3710 | { | |
7117c2d2 JA |
3711 | register char *s, *t; |
3712 | size_t slen; | |
3713 | char *result, *send; | |
3714 | DECLARE_MBSTATE; | |
726f6388 | 3715 | |
7117c2d2 JA |
3716 | slen = strlen (string); |
3717 | ||
3718 | t = result = (char *)xmalloc (slen + 1); | |
726f6388 JA |
3719 | |
3720 | if (QUOTED_NULL (string)) | |
3721 | { | |
3722 | result[0] = '\0'; | |
3723 | return (result); | |
3724 | } | |
3725 | ||
3726 | /* If no character in the string can be quoted, don't bother examining | |
3727 | each character. Just return a copy of the string passed to us. */ | |
7117c2d2 JA |
3728 | if (strchr (string, CTLESC) == NULL) |
3729 | return (strcpy (result, string)); | |
726f6388 | 3730 | |
7117c2d2 JA |
3731 | send = string + slen; |
3732 | s = string; | |
3733 | while (*s) | |
726f6388 | 3734 | { |
7117c2d2 | 3735 | if (*s == CTLESC) |
726f6388 | 3736 | { |
7117c2d2 JA |
3737 | s++; |
3738 | if (*s == '\0') | |
726f6388 JA |
3739 | break; |
3740 | } | |
7117c2d2 | 3741 | COPY_CHAR_P (t, s, send); |
726f6388 JA |
3742 | } |
3743 | ||
3744 | *t = '\0'; | |
3745 | return (result); | |
3746 | } | |
3747 | ||
3748 | /* Quote the entire WORD_LIST list. */ | |
ccc6cda3 | 3749 | static WORD_LIST * |
726f6388 JA |
3750 | quote_list (list) |
3751 | WORD_LIST *list; | |
3752 | { | |
3753 | register WORD_LIST *w; | |
ccc6cda3 | 3754 | char *t; |
726f6388 JA |
3755 | |
3756 | for (w = list; w; w = w->next) | |
3757 | { | |
ccc6cda3 | 3758 | t = w->word->word; |
726f6388 | 3759 | w->word->word = quote_string (t); |
3185942a JA |
3760 | if (*t == 0) |
3761 | w->word->flags |= W_HASQUOTEDNULL; /* XXX - turn on W_HASQUOTEDNULL here? */ | |
ccc6cda3 | 3762 | w->word->flags |= W_QUOTED; |
3185942a | 3763 | free (t); |
726f6388 | 3764 | } |
ccc6cda3 | 3765 | return list; |
726f6388 JA |
3766 | } |
3767 | ||
0628567a JA |
3768 | /* De-quote quoted characters in each word in LIST. */ |
3769 | WORD_LIST * | |
7117c2d2 JA |
3770 | dequote_list (list) |
3771 | WORD_LIST *list; | |
3772 | { | |
3773 | register char *s; | |
3774 | register WORD_LIST *tlist; | |
3775 | ||
3776 | for (tlist = list; tlist; tlist = tlist->next) | |
3777 | { | |
3778 | s = dequote_string (tlist->word->word); | |
3185942a JA |
3779 | if (QUOTED_NULL (tlist->word->word)) |
3780 | tlist->word->flags &= ~W_HASQUOTEDNULL; | |
7117c2d2 JA |
3781 | free (tlist->word->word); |
3782 | tlist->word->word = s; | |
3783 | } | |
3784 | return list; | |
3785 | } | |
3786 | ||
3787 | /* Remove CTLESC protecting a CTLESC or CTLNUL in place. Return the passed | |
3788 | string. */ | |
3185942a | 3789 | char * |
7117c2d2 JA |
3790 | remove_quoted_escapes (string) |
3791 | char *string; | |
3792 | { | |
3793 | char *t; | |
3794 | ||
3795 | if (string) | |
3796 | { | |
3797 | t = dequote_escapes (string); | |
3798 | strcpy (string, t); | |
3799 | free (t); | |
3800 | } | |
3801 | ||
3802 | return (string); | |
3803 | } | |
3804 | ||
cce855bc JA |
3805 | /* Perform quoted null character removal on STRING. We don't allow any |
3806 | quoted null characters in the middle or at the ends of strings because | |
3807 | of how expand_word_internal works. remove_quoted_nulls () turns | |
3808 | STRING into an empty string iff it only consists of a quoted null, | |
3809 | and removes all unquoted CTLNUL characters. */ | |
3185942a | 3810 | char * |
cce855bc JA |
3811 | remove_quoted_nulls (string) |
3812 | char *string; | |
3813 | { | |
7117c2d2 JA |
3814 | register size_t slen; |
3815 | register int i, j, prev_i; | |
3816 | DECLARE_MBSTATE; | |
3817 | ||
3818 | if (strchr (string, CTLNUL) == 0) /* XXX */ | |
3819 | return string; /* XXX */ | |
3820 | ||
3821 | slen = strlen (string); | |
3822 | i = j = 0; | |
3823 | ||
3824 | while (i < slen) | |
3825 | { | |
3826 | if (string[i] == CTLESC) | |
b80f6443 JA |
3827 | { |
3828 | /* Old code had j++, but we cannot assume that i == j at this | |
3829 | point -- what if a CTLNUL has already been removed from the | |
3830 | string? We don't want to drop the CTLESC or recopy characters | |
3831 | that we've already copied down. */ | |
3832 | i++; string[j++] = CTLESC; | |
3833 | if (i == slen) | |
3834 | break; | |
3835 | } | |
7117c2d2 | 3836 | else if (string[i] == CTLNUL) |
a48a8ac3 CR |
3837 | { |
3838 | i++; | |
3839 | continue; | |
3840 | } | |
7117c2d2 JA |
3841 | |
3842 | prev_i = i; | |
3843 | ADVANCE_CHAR (string, slen, i); | |
3844 | if (j < prev_i) | |
cce855bc | 3845 | { |
7117c2d2 | 3846 | do string[j++] = string[prev_i++]; while (prev_i < i); |
cce855bc | 3847 | } |
7117c2d2 JA |
3848 | else |
3849 | j = i; | |
cce855bc | 3850 | } |
7117c2d2 JA |
3851 | string[j] = '\0'; |
3852 | ||
3853 | return (string); | |
cce855bc JA |
3854 | } |
3855 | ||
3856 | /* Perform quoted null character removal on each element of LIST. | |
3857 | This modifies LIST. */ | |
3858 | void | |
3859 | word_list_remove_quoted_nulls (list) | |
3860 | WORD_LIST *list; | |
3861 | { | |
3862 | register WORD_LIST *t; | |
3863 | ||
3864 | for (t = list; t; t = t->next) | |
95732b49 JA |
3865 | { |
3866 | remove_quoted_nulls (t->word->word); | |
3867 | t->word->flags &= ~W_HASQUOTEDNULL; | |
3868 | } | |
cce855bc JA |
3869 | } |
3870 | ||
3871 | /* **************************************************************** */ | |
3872 | /* */ | |
3873 | /* Functions for Matching and Removing Patterns */ | |
3874 | /* */ | |
3875 | /* **************************************************************** */ | |
3876 | ||
b80f6443 JA |
3877 | #if defined (HANDLE_MULTIBYTE) |
3878 | #if 0 /* Currently unused */ | |
3879 | static unsigned char * | |
3880 | mb_getcharlens (string, len) | |
3881 | char *string; | |
3882 | int len; | |
3883 | { | |
3884 | int i, offset, last; | |
3885 | unsigned char *ret; | |
3886 | char *p; | |
3887 | DECLARE_MBSTATE; | |
3888 | ||
3889 | i = offset = 0; | |
3890 | last = 0; | |
3891 | ret = (unsigned char *)xmalloc (len); | |
3892 | memset (ret, 0, len); | |
3893 | while (string[last]) | |
3894 | { | |
3895 | ADVANCE_CHAR (string, len, offset); | |
3896 | ret[last] = offset - last; | |
3897 | last = offset; | |
3898 | } | |
3899 | return ret; | |
3900 | } | |
3901 | #endif | |
3902 | #endif | |
3903 | ||
cce855bc JA |
3904 | /* Remove the portion of PARAM matched by PATTERN according to OP, where OP |
3905 | can have one of 4 values: | |
3906 | RP_LONG_LEFT remove longest matching portion at start of PARAM | |
726f6388 JA |
3907 | RP_SHORT_LEFT remove shortest matching portion at start of PARAM |
3908 | RP_LONG_RIGHT remove longest matching portion at end of PARAM | |
3909 | RP_SHORT_RIGHT remove shortest matching portion at end of PARAM | |
3910 | */ | |
3911 | ||
3912 | #define RP_LONG_LEFT 1 | |
3913 | #define RP_SHORT_LEFT 2 | |
3914 | #define RP_LONG_RIGHT 3 | |
3915 | #define RP_SHORT_RIGHT 4 | |
3916 | ||
495aee44 | 3917 | /* Returns its first argument if nothing matched; new memory otherwise */ |
726f6388 | 3918 | static char * |
b80f6443 | 3919 | remove_upattern (param, pattern, op) |
726f6388 JA |
3920 | char *param, *pattern; |
3921 | int op; | |
3922 | { | |
ccc6cda3 JA |
3923 | register int len; |
3924 | register char *end; | |
726f6388 JA |
3925 | register char *p, *ret, c; |
3926 | ||
ccc6cda3 JA |
3927 | len = STRLEN (param); |
3928 | end = param + len; | |
726f6388 JA |
3929 | |
3930 | switch (op) | |
3931 | { | |
3932 | case RP_LONG_LEFT: /* remove longest match at start */ | |
3933 | for (p = end; p >= param; p--) | |
3934 | { | |
3935 | c = *p; *p = '\0'; | |
f73dda09 | 3936 | if (strmatch (pattern, param, FNMATCH_EXTFLAG) != FNM_NOMATCH) |
726f6388 JA |
3937 | { |
3938 | *p = c; | |
3939 | return (savestring (p)); | |
3940 | } | |
3941 | *p = c; | |
b80f6443 | 3942 | |
726f6388 JA |
3943 | } |
3944 | break; | |
3945 | ||
3946 | case RP_SHORT_LEFT: /* remove shortest match at start */ | |
3947 | for (p = param; p <= end; p++) | |
3948 | { | |
3949 | c = *p; *p = '\0'; | |
f73dda09 | 3950 | if (strmatch (pattern, param, FNMATCH_EXTFLAG) != FNM_NOMATCH) |
726f6388 JA |
3951 | { |
3952 | *p = c; | |
3953 | return (savestring (p)); | |
3954 | } | |
3955 | *p = c; | |
3956 | } | |
3957 | break; | |
3958 | ||
ccc6cda3 JA |
3959 | case RP_LONG_RIGHT: /* remove longest match at end */ |
3960 | for (p = param; p <= end; p++) | |
3961 | { | |
f73dda09 | 3962 | if (strmatch (pattern, p, FNMATCH_EXTFLAG) != FNM_NOMATCH) |
ccc6cda3 JA |
3963 | { |
3964 | c = *p; *p = '\0'; | |
3965 | ret = savestring (param); | |
3966 | *p = c; | |
3967 | return (ret); | |
3968 | } | |
3969 | } | |
3970 | break; | |
3971 | ||
3972 | case RP_SHORT_RIGHT: /* remove shortest match at end */ | |
3973 | for (p = end; p >= param; p--) | |
3974 | { | |
f73dda09 | 3975 | if (strmatch (pattern, p, FNMATCH_EXTFLAG) != FNM_NOMATCH) |
ccc6cda3 JA |
3976 | { |
3977 | c = *p; *p = '\0'; | |
3978 | ret = savestring (param); | |
3979 | *p = c; | |
3980 | return (ret); | |
3981 | } | |
3982 | } | |
3983 | break; | |
3984 | } | |
b80f6443 | 3985 | |
495aee44 | 3986 | return (param); /* no match, return original string */ |
ccc6cda3 JA |
3987 | } |
3988 | ||
b80f6443 | 3989 | #if defined (HANDLE_MULTIBYTE) |
495aee44 | 3990 | /* Returns its first argument if nothing matched; new memory otherwise */ |
b80f6443 JA |
3991 | static wchar_t * |
3992 | remove_wpattern (wparam, wstrlen, wpattern, op) | |
3993 | wchar_t *wparam; | |
3994 | size_t wstrlen; | |
3995 | wchar_t *wpattern; | |
3996 | int op; | |
3997 | { | |
0628567a JA |
3998 | wchar_t wc, *ret; |
3999 | int n; | |
b80f6443 JA |
4000 | |
4001 | switch (op) | |
4002 | { | |
4003 | case RP_LONG_LEFT: /* remove longest match at start */ | |
4004 | for (n = wstrlen; n >= 0; n--) | |
4005 | { | |
4006 | wc = wparam[n]; wparam[n] = L'\0'; | |
4007 | if (wcsmatch (wpattern, wparam, FNMATCH_EXTFLAG) != FNM_NOMATCH) | |
4008 | { | |
4009 | wparam[n] = wc; | |
4010 | return (wcsdup (wparam + n)); | |
4011 | } | |
4012 | wparam[n] = wc; | |
4013 | } | |
4014 | break; | |
4015 | ||
4016 | case RP_SHORT_LEFT: /* remove shortest match at start */ | |
4017 | for (n = 0; n <= wstrlen; n++) | |
4018 | { | |
4019 | wc = wparam[n]; wparam[n] = L'\0'; | |
4020 | if (wcsmatch (wpattern, wparam, FNMATCH_EXTFLAG) != FNM_NOMATCH) | |
4021 | { | |
4022 | wparam[n] = wc; | |
4023 | return (wcsdup (wparam + n)); | |
4024 | } | |
4025 | wparam[n] = wc; | |
4026 | } | |
4027 | break; | |
4028 | ||
4029 | case RP_LONG_RIGHT: /* remove longest match at end */ | |
4030 | for (n = 0; n <= wstrlen; n++) | |
4031 | { | |
4032 | if (wcsmatch (wpattern, wparam + n, FNMATCH_EXTFLAG) != FNM_NOMATCH) | |
4033 | { | |
4034 | wc = wparam[n]; wparam[n] = L'\0'; | |
4035 | ret = wcsdup (wparam); | |
4036 | wparam[n] = wc; | |
4037 | return (ret); | |
4038 | } | |
4039 | } | |
4040 | break; | |
4041 | ||
4042 | case RP_SHORT_RIGHT: /* remove shortest match at end */ | |
4043 | for (n = wstrlen; n >= 0; n--) | |
4044 | { | |
4045 | if (wcsmatch (wpattern, wparam + n, FNMATCH_EXTFLAG) != FNM_NOMATCH) | |
4046 | { | |
4047 | wc = wparam[n]; wparam[n] = L'\0'; | |
4048 | ret = wcsdup (wparam); | |
4049 | wparam[n] = wc; | |
4050 | return (ret); | |
4051 | } | |
4052 | } | |
4053 | break; | |
4054 | } | |
4055 | ||
495aee44 | 4056 | return (wparam); /* no match, return original string */ |
b80f6443 JA |
4057 | } |
4058 | #endif /* HANDLE_MULTIBYTE */ | |
4059 | ||
4060 | static char * | |
4061 | remove_pattern (param, pattern, op) | |
4062 | char *param, *pattern; | |
4063 | int op; | |
4064 | { | |
495aee44 CR |
4065 | char *xret; |
4066 | ||
b80f6443 JA |
4067 | if (param == NULL) |
4068 | return (param); | |
4069 | if (*param == '\0' || pattern == NULL || *pattern == '\0') /* minor optimization */ | |
4070 | return (savestring (param)); | |
4071 | ||
4072 | #if defined (HANDLE_MULTIBYTE) | |
4073 | if (MB_CUR_MAX > 1) | |
4074 | { | |
4075 | wchar_t *ret, *oret; | |
4076 | size_t n; | |
4077 | wchar_t *wparam, *wpattern; | |
4078 | mbstate_t ps; | |
b80f6443 JA |
4079 | |
4080 | n = xdupmbstowcs (&wpattern, NULL, pattern); | |
4081 | if (n == (size_t)-1) | |
495aee44 CR |
4082 | { |
4083 | xret = remove_upattern (param, pattern, op); | |
4084 | return ((xret == param) ? savestring (param) : xret); | |
4085 | } | |
b80f6443 | 4086 | n = xdupmbstowcs (&wparam, NULL, param); |
ac50fbac | 4087 | |
b80f6443 JA |
4088 | if (n == (size_t)-1) |
4089 | { | |
4090 | free (wpattern); | |
495aee44 CR |
4091 | xret = remove_upattern (param, pattern, op); |
4092 | return ((xret == param) ? savestring (param) : xret); | |
b80f6443 JA |
4093 | } |
4094 | oret = ret = remove_wpattern (wparam, n, wpattern, op); | |
495aee44 CR |
4095 | /* Don't bother to convert wparam back to multibyte string if nothing |
4096 | matched; just return copy of original string */ | |
4097 | if (ret == wparam) | |
4098 | { | |
4099 | free (wparam); | |
4100 | free (wpattern); | |
4101 | return (savestring (param)); | |
4102 | } | |
b80f6443 JA |
4103 | |
4104 | free (wparam); | |
4105 | free (wpattern); | |
4106 | ||
4107 | n = strlen (param); | |
0628567a | 4108 | xret = (char *)xmalloc (n + 1); |
b80f6443 JA |
4109 | memset (&ps, '\0', sizeof (mbstate_t)); |
4110 | n = wcsrtombs (xret, (const wchar_t **)&ret, n, &ps); | |
4111 | xret[n] = '\0'; /* just to make sure */ | |
4112 | free (oret); | |
4113 | return xret; | |
4114 | } | |
4115 | else | |
4116 | #endif | |
ccc6cda3 | 4117 | { |
495aee44 CR |
4118 | xret = remove_upattern (param, pattern, op); |
4119 | return ((xret == param) ? savestring (param) : xret); | |
ccc6cda3 JA |
4120 | } |
4121 | } | |
4122 | ||
4123 | /* Match PAT anywhere in STRING and return the match boundaries. | |
4124 | This returns 1 in case of a successful match, 0 otherwise. SP | |
4125 | and EP are pointers into the string where the match begins and | |
4126 | ends, respectively. MTYPE controls what kind of match is attempted. | |
4127 | MATCH_BEG and MATCH_END anchor the match at the beginning and end | |
4128 | of the string, respectively. The longest match is returned. */ | |
4129 | static int | |
b80f6443 | 4130 | match_upattern (string, pat, mtype, sp, ep) |
ccc6cda3 JA |
4131 | char *string, *pat; |
4132 | int mtype; | |
4133 | char **sp, **ep; | |
4134 | { | |
495aee44 | 4135 | int c, len, mlen; |
95732b49 | 4136 | register char *p, *p1, *npat; |
ccc6cda3 | 4137 | char *end; |
495aee44 | 4138 | int n1; |
ccc6cda3 | 4139 | |
95732b49 JA |
4140 | /* If the pattern doesn't match anywhere in the string, go ahead and |
4141 | short-circuit right away. A minor optimization, saves a bunch of | |
4142 | unnecessary calls to strmatch (up to N calls for a string of N | |
4143 | characters) if the match is unsuccessful. To preserve the semantics | |
4144 | of the substring matches below, we make sure that the pattern has | |
4145 | `*' as first and last character, making a new pattern if necessary. */ | |
4146 | /* XXX - check this later if I ever implement `**' with special meaning, | |
4147 | since this will potentially result in `**' at the beginning or end */ | |
4148 | len = STRLEN (pat); | |
0001803f | 4149 | if (pat[0] != '*' || (pat[0] == '*' && pat[1] == LPAREN && extended_glob) || pat[len - 1] != '*') |
95732b49 | 4150 | { |
0628567a | 4151 | p = npat = (char *)xmalloc (len + 3); |
95732b49 | 4152 | p1 = pat; |
0001803f | 4153 | if (*p1 != '*' || (*p1 == '*' && p1[1] == LPAREN && extended_glob)) |
95732b49 JA |
4154 | *p++ = '*'; |
4155 | while (*p1) | |
4156 | *p++ = *p1++; | |
4157 | if (p1[-1] != '*' || p[-2] == '\\') | |
4158 | *p++ = '*'; | |
4159 | *p = '\0'; | |
4160 | } | |
4161 | else | |
4162 | npat = pat; | |
4163 | c = strmatch (npat, string, FNMATCH_EXTFLAG); | |
4164 | if (npat != pat) | |
4165 | free (npat); | |
4166 | if (c == FNM_NOMATCH) | |
4167 | return (0); | |
4168 | ||
b80f6443 JA |
4169 | len = STRLEN (string); |
4170 | end = string + len; | |
ccc6cda3 | 4171 | |
495aee44 CR |
4172 | mlen = umatchlen (pat, len); |
4173 | ||
ccc6cda3 JA |
4174 | switch (mtype) |
4175 | { | |
4176 | case MATCH_ANY: | |
4177 | for (p = string; p <= end; p++) | |
4178 | { | |
4179 | if (match_pattern_char (pat, p)) | |
4180 | { | |
495aee44 CR |
4181 | p1 = (mlen == -1) ? end : p + mlen; |
4182 | /* p1 - p = length of portion of string to be considered | |
4183 | p = current position in string | |
4184 | mlen = number of characters consumed by match (-1 for entire string) | |
4185 | end = end of string | |
4186 | we want to break immediately if the potential match len | |
4187 | is greater than the number of characters remaining in the | |
4188 | string | |
4189 | */ | |
4190 | if (p1 > end) | |
4191 | break; | |
4192 | for ( ; p1 >= p; p1--) | |
ccc6cda3 JA |
4193 | { |
4194 | c = *p1; *p1 = '\0'; | |
f73dda09 | 4195 | if (strmatch (pat, p, FNMATCH_EXTFLAG) == 0) |
ccc6cda3 JA |
4196 | { |
4197 | *p1 = c; | |
4198 | *sp = p; | |
4199 | *ep = p1; | |
4200 | return 1; | |
4201 | } | |
4202 | *p1 = c; | |
495aee44 CR |
4203 | #if 1 |
4204 | /* If MLEN != -1, we have a fixed length pattern. */ | |
4205 | if (mlen != -1) | |
4206 | break; | |
4207 | #endif | |
ccc6cda3 JA |
4208 | } |
4209 | } | |
4210 | } | |
b80f6443 | 4211 | |
ccc6cda3 JA |
4212 | return (0); |
4213 | ||
4214 | case MATCH_BEG: | |
4215 | if (match_pattern_char (pat, string) == 0) | |
28ef6c31 | 4216 | return (0); |
b80f6443 | 4217 | |
495aee44 | 4218 | for (p = (mlen == -1) ? end : string + mlen; p >= string; p--) |
ccc6cda3 JA |
4219 | { |
4220 | c = *p; *p = '\0'; | |
f73dda09 | 4221 | if (strmatch (pat, string, FNMATCH_EXTFLAG) == 0) |
ccc6cda3 JA |
4222 | { |
4223 | *p = c; | |
4224 | *sp = string; | |
4225 | *ep = p; | |
4226 | return 1; | |
4227 | } | |
4228 | *p = c; | |
495aee44 CR |
4229 | /* If MLEN != -1, we have a fixed length pattern. */ |
4230 | if (mlen != -1) | |
4231 | break; | |
ccc6cda3 | 4232 | } |
b80f6443 | 4233 | |
ccc6cda3 | 4234 | return (0); |
726f6388 | 4235 | |
ccc6cda3 | 4236 | case MATCH_END: |
495aee44 | 4237 | for (p = end - ((mlen == -1) ? len : mlen); p <= end; p++) |
b80f6443 JA |
4238 | { |
4239 | if (strmatch (pat, p, FNMATCH_EXTFLAG) == 0) | |
4240 | { | |
4241 | *sp = p; | |
4242 | *ep = end; | |
4243 | return 1; | |
4244 | } | |
495aee44 CR |
4245 | /* If MLEN != -1, we have a fixed length pattern. */ |
4246 | if (mlen != -1) | |
4247 | break; | |
b80f6443 JA |
4248 | } |
4249 | ||
4250 | return (0); | |
4251 | } | |
4252 | ||
4253 | return (0); | |
4254 | } | |
4255 | ||
4256 | #if defined (HANDLE_MULTIBYTE) | |
b80f6443 JA |
4257 | /* Match WPAT anywhere in WSTRING and return the match boundaries. |
4258 | This returns 1 in case of a successful match, 0 otherwise. Wide | |
4259 | character version. */ | |
4260 | static int | |
4261 | match_wpattern (wstring, indices, wstrlen, wpat, mtype, sp, ep) | |
4262 | wchar_t *wstring; | |
4263 | char **indices; | |
4264 | size_t wstrlen; | |
4265 | wchar_t *wpat; | |
4266 | int mtype; | |
4267 | char **sp, **ep; | |
4268 | { | |
95732b49 | 4269 | wchar_t wc, *wp, *nwpat, *wp1; |
495aee44 CR |
4270 | size_t len; |
4271 | int mlen; | |
4272 | int n, n1, n2, simple; | |
4273 | ||
4274 | simple = (wpat[0] != L'\\' && wpat[0] != L'*' && wpat[0] != L'?' && wpat[0] != L'['); | |
4275 | #if defined (EXTENDED_GLOB) | |
4276 | if (extended_glob) | |
91717ba3 | 4277 | simple &= (wpat[1] != L'(' || (wpat[0] != L'*' && wpat[0] != L'?' && wpat[0] != L'+' && wpat[0] != L'!' && wpat[0] != L'@')); /*)*/ |
b80f6443 JA |
4278 | #endif |
4279 | ||
95732b49 JA |
4280 | /* If the pattern doesn't match anywhere in the string, go ahead and |
4281 | short-circuit right away. A minor optimization, saves a bunch of | |
4282 | unnecessary calls to strmatch (up to N calls for a string of N | |
4283 | characters) if the match is unsuccessful. To preserve the semantics | |
4284 | of the substring matches below, we make sure that the pattern has | |
4285 | `*' as first and last character, making a new pattern if necessary. */ | |
95732b49 | 4286 | len = wcslen (wpat); |
0001803f | 4287 | if (wpat[0] != L'*' || (wpat[0] == L'*' && wpat[1] == WLPAREN && extended_glob) || wpat[len - 1] != L'*') |
95732b49 | 4288 | { |
0628567a | 4289 | wp = nwpat = (wchar_t *)xmalloc ((len + 3) * sizeof (wchar_t)); |
95732b49 | 4290 | wp1 = wpat; |
0001803f | 4291 | if (*wp1 != L'*' || (*wp1 == '*' && wp1[1] == WLPAREN && extended_glob)) |
95732b49 JA |
4292 | *wp++ = L'*'; |
4293 | while (*wp1 != L'\0') | |
4294 | *wp++ = *wp1++; | |
4295 | if (wp1[-1] != L'*' || wp1[-2] == L'\\') | |
4296 | *wp++ = L'*'; | |
4297 | *wp = '\0'; | |
4298 | } | |
4299 | else | |
4300 | nwpat = wpat; | |
4301 | len = wcsmatch (nwpat, wstring, FNMATCH_EXTFLAG); | |
4302 | if (nwpat != wpat) | |
4303 | free (nwpat); | |
4304 | if (len == FNM_NOMATCH) | |
4305 | return (0); | |
4306 | ||
495aee44 CR |
4307 | mlen = wmatchlen (wpat, wstrlen); |
4308 | ||
4309 | /* itrace("wmatchlen (%ls) -> %d", wpat, mlen); */ | |
b80f6443 JA |
4310 | switch (mtype) |
4311 | { | |
4312 | case MATCH_ANY: | |
4313 | for (n = 0; n <= wstrlen; n++) | |
4314 | { | |
495aee44 | 4315 | n2 = simple ? (*wpat == wstring[n]) : match_pattern_wchar (wpat, wstring + n); |
495aee44 | 4316 | if (n2) |
b80f6443 | 4317 | { |
495aee44 CR |
4318 | n1 = (mlen == -1) ? wstrlen : n + mlen; |
4319 | if (n1 > wstrlen) | |
4320 | break; | |
4321 | ||
4322 | for ( ; n1 >= n; n1--) | |
b80f6443 JA |
4323 | { |
4324 | wc = wstring[n1]; wstring[n1] = L'\0'; | |
4325 | if (wcsmatch (wpat, wstring + n, FNMATCH_EXTFLAG) == 0) | |
4326 | { | |
4327 | wstring[n1] = wc; | |
4328 | *sp = indices[n]; | |
4329 | *ep = indices[n1]; | |
4330 | return 1; | |
4331 | } | |
4332 | wstring[n1] = wc; | |
495aee44 CR |
4333 | /* If MLEN != -1, we have a fixed length pattern. */ |
4334 | if (mlen != -1) | |
4335 | break; | |
b80f6443 JA |
4336 | } |
4337 | } | |
4338 | } | |
4339 | ||
4340 | return (0); | |
4341 | ||
4342 | case MATCH_BEG: | |
4343 | if (match_pattern_wchar (wpat, wstring) == 0) | |
4344 | return (0); | |
4345 | ||
495aee44 | 4346 | for (n = (mlen == -1) ? wstrlen : mlen; n >= 0; n--) |
b80f6443 JA |
4347 | { |
4348 | wc = wstring[n]; wstring[n] = L'\0'; | |
4349 | if (wcsmatch (wpat, wstring, FNMATCH_EXTFLAG) == 0) | |
4350 | { | |
4351 | wstring[n] = wc; | |
4352 | *sp = indices[0]; | |
4353 | *ep = indices[n]; | |
4354 | return 1; | |
4355 | } | |
4356 | wstring[n] = wc; | |
495aee44 CR |
4357 | /* If MLEN != -1, we have a fixed length pattern. */ |
4358 | if (mlen != -1) | |
4359 | break; | |
b80f6443 JA |
4360 | } |
4361 | ||
4362 | return (0); | |
4363 | ||
4364 | case MATCH_END: | |
495aee44 | 4365 | for (n = wstrlen - ((mlen == -1) ? wstrlen : mlen); n <= wstrlen; n++) |
b80f6443 JA |
4366 | { |
4367 | if (wcsmatch (wpat, wstring + n, FNMATCH_EXTFLAG) == 0) | |
4368 | { | |
4369 | *sp = indices[n]; | |
4370 | *ep = indices[wstrlen]; | |
4371 | return 1; | |
4372 | } | |
495aee44 CR |
4373 | /* If MLEN != -1, we have a fixed length pattern. */ |
4374 | if (mlen != -1) | |
4375 | break; | |
b80f6443 JA |
4376 | } |
4377 | ||
ccc6cda3 | 4378 | return (0); |
726f6388 | 4379 | } |
ccc6cda3 JA |
4380 | |
4381 | return (0); | |
726f6388 | 4382 | } |
b80f6443 JA |
4383 | #endif /* HANDLE_MULTIBYTE */ |
4384 | ||
4385 | static int | |
4386 | match_pattern (string, pat, mtype, sp, ep) | |
4387 | char *string, *pat; | |
4388 | int mtype; | |
4389 | char **sp, **ep; | |
4390 | { | |
4391 | #if defined (HANDLE_MULTIBYTE) | |
4392 | int ret; | |
4393 | size_t n; | |
4394 | wchar_t *wstring, *wpat; | |
4395 | char **indices; | |
495aee44 | 4396 | size_t slen, plen, mslen, mplen; |
b80f6443 JA |
4397 | #endif |
4398 | ||
4399 | if (string == 0 || *string == 0 || pat == 0 || *pat == 0) | |
4400 | return (0); | |
4401 | ||
4402 | #if defined (HANDLE_MULTIBYTE) | |
4403 | if (MB_CUR_MAX > 1) | |
4404 | { | |
495aee44 | 4405 | if (mbsmbchar (string) == 0 && mbsmbchar (pat) == 0) |
495aee44 CR |
4406 | return (match_upattern (string, pat, mtype, sp, ep)); |
4407 | ||
b80f6443 JA |
4408 | n = xdupmbstowcs (&wpat, NULL, pat); |
4409 | if (n == (size_t)-1) | |
4410 | return (match_upattern (string, pat, mtype, sp, ep)); | |
4411 | n = xdupmbstowcs (&wstring, &indices, string); | |
4412 | if (n == (size_t)-1) | |
4413 | { | |
4414 | free (wpat); | |
4415 | return (match_upattern (string, pat, mtype, sp, ep)); | |
4416 | } | |
4417 | ret = match_wpattern (wstring, indices, n, wpat, mtype, sp, ep); | |
4418 | ||
4419 | free (wpat); | |
4420 | free (wstring); | |
4421 | free (indices); | |
4422 | ||
4423 | return (ret); | |
4424 | } | |
4425 | else | |
4426 | #endif | |
4427 | return (match_upattern (string, pat, mtype, sp, ep)); | |
4428 | } | |
726f6388 | 4429 | |
cce855bc JA |
4430 | static int |
4431 | getpatspec (c, value) | |
4432 | int c; | |
4433 | char *value; | |
4434 | { | |
4435 | if (c == '#') | |
4436 | return ((*value == '#') ? RP_LONG_LEFT : RP_SHORT_LEFT); | |
4437 | else /* c == '%' */ | |
4438 | return ((*value == '%') ? RP_LONG_RIGHT : RP_SHORT_RIGHT); | |
4439 | } | |
4440 | ||
4441 | /* Posix.2 says that the WORD should be run through tilde expansion, | |
4442 | parameter expansion, command substitution and arithmetic expansion. | |
4443 | This leaves the result quoted, so quote_string_for_globbing () has | |
f73dda09 | 4444 | to be called to fix it up for strmatch (). If QUOTED is non-zero, |
cce855bc JA |
4445 | it means that the entire expression was enclosed in double quotes. |
4446 | This means that quoting characters in the pattern do not make any | |
4447 | special pattern characters quoted. For example, the `*' in the | |
4448 | following retains its special meaning: "${foo#'*'}". */ | |
4449 | static char * | |
4450 | getpattern (value, quoted, expandpat) | |
4451 | char *value; | |
4452 | int quoted, expandpat; | |
4453 | { | |
4454 | char *pat, *tword; | |
4455 | WORD_LIST *l; | |
0628567a | 4456 | #if 0 |
cce855bc | 4457 | int i; |
0628567a | 4458 | #endif |
7117c2d2 JA |
4459 | /* There is a problem here: how to handle single or double quotes in the |
4460 | pattern string when the whole expression is between double quotes? | |
4461 | POSIX.2 says that enclosing double quotes do not cause the pattern to | |
4462 | be quoted, but does that leave us a problem with @ and array[@] and their | |
4463 | expansions inside a pattern? */ | |
4464 | #if 0 | |
cce855bc JA |
4465 | if (expandpat && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && *tword) |
4466 | { | |
4467 | i = 0; | |
4468 | pat = string_extract_double_quoted (tword, &i, 1); | |
4469 | free (tword); | |
4470 | tword = pat; | |
4471 | } | |
7117c2d2 | 4472 | #endif |
cce855bc | 4473 | |
7117c2d2 JA |
4474 | /* expand_string_for_rhs () leaves WORD quoted and does not perform |
4475 | word splitting. */ | |
95732b49 | 4476 | l = *value ? expand_string_for_rhs (value, |
7117c2d2 | 4477 | (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) ? Q_PATQUOTE : quoted, |
cce855bc | 4478 | (int *)NULL, (int *)NULL) |
cce855bc | 4479 | : (WORD_LIST *)0; |
cce855bc JA |
4480 | pat = string_list (l); |
4481 | dispose_words (l); | |
4482 | if (pat) | |
4483 | { | |
4484 | tword = quote_string_for_globbing (pat, QGLOB_CVTNULL); | |
4485 | free (pat); | |
4486 | pat = tword; | |
4487 | } | |
4488 | return (pat); | |
4489 | } | |
4490 | ||
7117c2d2 | 4491 | #if 0 |
cce855bc JA |
4492 | /* Handle removing a pattern from a string as a result of ${name%[%]value} |
4493 | or ${name#[#]value}. */ | |
4494 | static char * | |
7117c2d2 JA |
4495 | variable_remove_pattern (value, pattern, patspec, quoted) |
4496 | char *value, *pattern; | |
4497 | int patspec, quoted; | |
cce855bc | 4498 | { |
7117c2d2 | 4499 | char *tword; |
cce855bc | 4500 | |
7117c2d2 | 4501 | tword = remove_pattern (value, pattern, patspec); |
cce855bc | 4502 | |
cce855bc JA |
4503 | return (tword); |
4504 | } | |
7117c2d2 | 4505 | #endif |
cce855bc JA |
4506 | |
4507 | static char * | |
7117c2d2 | 4508 | list_remove_pattern (list, pattern, patspec, itype, quoted) |
cce855bc JA |
4509 | WORD_LIST *list; |
4510 | char *pattern; | |
7117c2d2 | 4511 | int patspec, itype, quoted; |
cce855bc JA |
4512 | { |
4513 | WORD_LIST *new, *l; | |
4514 | WORD_DESC *w; | |
4515 | char *tword; | |
4516 | ||
4517 | for (new = (WORD_LIST *)NULL, l = list; l; l = l->next) | |
4518 | { | |
4519 | tword = remove_pattern (l->word->word, pattern, patspec); | |
95732b49 JA |
4520 | w = alloc_word_desc (); |
4521 | w->word = tword ? tword : savestring (""); | |
cce855bc JA |
4522 | new = make_word_list (w, new); |
4523 | } | |
4524 | ||
4525 | l = REVERSE_LIST (new, WORD_LIST *); | |
3185942a | 4526 | tword = string_list_pos_params (itype, l, quoted); |
cce855bc | 4527 | dispose_words (l); |
3185942a | 4528 | |
cce855bc JA |
4529 | return (tword); |
4530 | } | |
4531 | ||
4532 | static char * | |
7117c2d2 JA |
4533 | parameter_list_remove_pattern (itype, pattern, patspec, quoted) |
4534 | int itype; | |
4535 | char *pattern; | |
4536 | int patspec, quoted; | |
cce855bc | 4537 | { |
7117c2d2 | 4538 | char *ret; |
cce855bc JA |
4539 | WORD_LIST *list; |
4540 | ||
cce855bc | 4541 | list = list_rest_of_args (); |
7117c2d2 JA |
4542 | if (list == 0) |
4543 | return ((char *)NULL); | |
4544 | ret = list_remove_pattern (list, pattern, patspec, itype, quoted); | |
cce855bc | 4545 | dispose_words (list); |
cce855bc JA |
4546 | return (ret); |
4547 | } | |
4548 | ||
4549 | #if defined (ARRAY_VARS) | |
4550 | static char * | |
3185942a JA |
4551 | array_remove_pattern (var, pattern, patspec, varname, quoted) |
4552 | SHELL_VAR *var; | |
7117c2d2 JA |
4553 | char *pattern; |
4554 | int patspec; | |
4555 | char *varname; /* so we can figure out how it's indexed */ | |
4556 | int quoted; | |
cce855bc | 4557 | { |
3185942a JA |
4558 | ARRAY *a; |
4559 | HASH_TABLE *h; | |
7117c2d2 JA |
4560 | int itype; |
4561 | char *ret; | |
4562 | WORD_LIST *list; | |
4563 | SHELL_VAR *v; | |
cce855bc | 4564 | |
7117c2d2 JA |
4565 | /* compute itype from varname here */ |
4566 | v = array_variable_part (varname, &ret, 0); | |
ac50fbac CR |
4567 | |
4568 | /* XXX */ | |
4569 | if (v && invisible_p (var)) | |
4570 | return ((char *)NULL); | |
4571 | ||
7117c2d2 JA |
4572 | itype = ret[0]; |
4573 | ||
3185942a JA |
4574 | a = (v && array_p (v)) ? array_cell (v) : 0; |
4575 | h = (v && assoc_p (v)) ? assoc_cell (v) : 0; | |
4576 | ||
4577 | list = a ? array_to_word_list (a) : (h ? assoc_to_word_list (h) : 0); | |
7117c2d2 JA |
4578 | if (list == 0) |
4579 | return ((char *)NULL); | |
4580 | ret = list_remove_pattern (list, pattern, patspec, itype, quoted); | |
4581 | dispose_words (list); | |
4582 | ||
4583 | return ret; | |
4584 | } | |
4585 | #endif /* ARRAY_VARS */ | |
4586 | ||
4587 | static char * | |
495aee44 CR |
4588 | parameter_brace_remove_pattern (varname, value, ind, patstr, rtype, quoted, flags) |
4589 | char *varname, *value; | |
4590 | int ind; | |
4591 | char *patstr; | |
4592 | int rtype, quoted, flags; | |
7117c2d2 | 4593 | { |
b80f6443 | 4594 | int vtype, patspec, starsub; |
7117c2d2 JA |
4595 | char *temp1, *val, *pattern; |
4596 | SHELL_VAR *v; | |
4597 | ||
4598 | if (value == 0) | |
4599 | return ((char *)NULL); | |
4600 | ||
4601 | this_command_name = varname; | |
4602 | ||
495aee44 | 4603 | vtype = get_var_and_type (varname, value, ind, quoted, flags, &v, &val); |
7117c2d2 | 4604 | if (vtype == -1) |
cce855bc JA |
4605 | return ((char *)NULL); |
4606 | ||
b80f6443 JA |
4607 | starsub = vtype & VT_STARSUB; |
4608 | vtype &= ~VT_STARSUB; | |
4609 | ||
7117c2d2 | 4610 | patspec = getpatspec (rtype, patstr); |
cce855bc | 4611 | if (patspec == RP_LONG_LEFT || patspec == RP_LONG_RIGHT) |
7117c2d2 | 4612 | patstr++; |
cce855bc | 4613 | |
f1be666c JA |
4614 | /* Need to pass getpattern newly-allocated memory in case of expansion -- |
4615 | the expansion code will free the passed string on an error. */ | |
4616 | temp1 = savestring (patstr); | |
4617 | pattern = getpattern (temp1, quoted, 1); | |
4618 | free (temp1); | |
cce855bc | 4619 | |
7117c2d2 JA |
4620 | temp1 = (char *)NULL; /* shut up gcc */ |
4621 | switch (vtype) | |
cce855bc | 4622 | { |
7117c2d2 JA |
4623 | case VT_VARIABLE: |
4624 | case VT_ARRAYMEMBER: | |
4625 | temp1 = remove_pattern (val, pattern, patspec); | |
4626 | if (vtype == VT_VARIABLE) | |
4627 | FREE (val); | |
4628 | if (temp1) | |
28ef6c31 | 4629 | { |
3185942a JA |
4630 | val = (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) |
4631 | ? quote_string (temp1) | |
4632 | : quote_escapes (temp1); | |
7117c2d2 JA |
4633 | free (temp1); |
4634 | temp1 = val; | |
28ef6c31 | 4635 | } |
7117c2d2 JA |
4636 | break; |
4637 | #if defined (ARRAY_VARS) | |
4638 | case VT_ARRAYVAR: | |
3185942a | 4639 | temp1 = array_remove_pattern (v, pattern, patspec, varname, quoted); |
7117c2d2 | 4640 | if (temp1 && ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) == 0)) |
cce855bc | 4641 | { |
7117c2d2 JA |
4642 | val = quote_escapes (temp1); |
4643 | free (temp1); | |
4644 | temp1 = val; | |
cce855bc | 4645 | } |
7117c2d2 JA |
4646 | break; |
4647 | #endif | |
4648 | case VT_POSPARMS: | |
4649 | temp1 = parameter_list_remove_pattern (varname[0], pattern, patspec, quoted); | |
4650 | if (temp1 && ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) == 0)) | |
4651 | { | |
4652 | val = quote_escapes (temp1); | |
4653 | free (temp1); | |
4654 | temp1 = val; | |
4655 | } | |
4656 | break; | |
cce855bc JA |
4657 | } |
4658 | ||
4659 | FREE (pattern); | |
7117c2d2 JA |
4660 | return temp1; |
4661 | } | |
cce855bc | 4662 | |
726f6388 JA |
4663 | /******************************************* |
4664 | * * | |
4665 | * Functions to expand WORD_DESCs * | |
4666 | * * | |
4667 | *******************************************/ | |
4668 | ||
4669 | /* Expand WORD, performing word splitting on the result. This does | |
4670 | parameter expansion, command substitution, arithmetic expansion, | |
4671 | word splitting, and quote removal. */ | |
4672 | ||
4673 | WORD_LIST * | |
4674 | expand_word (word, quoted) | |
4675 | WORD_DESC *word; | |
4676 | int quoted; | |
4677 | { | |
4678 | WORD_LIST *result, *tresult; | |
4679 | ||
b72432fd | 4680 | tresult = call_expand_word_internal (word, quoted, 0, (int *)NULL, (int *)NULL); |
726f6388 JA |
4681 | result = word_list_split (tresult); |
4682 | dispose_words (tresult); | |
ccc6cda3 | 4683 | return (result ? dequote_list (result) : result); |
726f6388 JA |
4684 | } |
4685 | ||
4686 | /* Expand WORD, but do not perform word splitting on the result. This | |
4687 | does parameter expansion, command substitution, arithmetic expansion, | |
4688 | and quote removal. */ | |
4689 | WORD_LIST * | |
28ef6c31 | 4690 | expand_word_unsplit (word, quoted) |
726f6388 JA |
4691 | WORD_DESC *word; |
4692 | int quoted; | |
4693 | { | |
4694 | WORD_LIST *result; | |
4695 | ||
28ef6c31 | 4696 | expand_no_split_dollar_star = 1; |
0001803f CR |
4697 | #if defined (HANDLE_MULTIBYTE) |
4698 | if (ifs_firstc[0] == 0) | |
4699 | #else | |
4700 | if (ifs_firstc == 0) | |
4701 | #endif | |
4702 | word->flags |= W_NOSPLIT; | |
1cc06898 | 4703 | word->flags |= W_NOSPLIT2; |
b72432fd | 4704 | result = call_expand_word_internal (word, quoted, 0, (int *)NULL, (int *)NULL); |
28ef6c31 | 4705 | expand_no_split_dollar_star = 0; |
7117c2d2 | 4706 | |
ccc6cda3 | 4707 | return (result ? dequote_list (result) : result); |
726f6388 JA |
4708 | } |
4709 | ||
4710 | /* Perform shell expansions on WORD, but do not perform word splitting or | |
0001803f CR |
4711 | quote removal on the result. Virtually identical to expand_word_unsplit; |
4712 | could be combined if implementations don't diverge. */ | |
726f6388 JA |
4713 | WORD_LIST * |
4714 | expand_word_leave_quoted (word, quoted) | |
4715 | WORD_DESC *word; | |
4716 | int quoted; | |
4717 | { | |
0001803f CR |
4718 | WORD_LIST *result; |
4719 | ||
4720 | expand_no_split_dollar_star = 1; | |
4721 | #if defined (HANDLE_MULTIBYTE) | |
4722 | if (ifs_firstc[0] == 0) | |
4723 | #else | |
4724 | if (ifs_firstc == 0) | |
4725 | #endif | |
4726 | word->flags |= W_NOSPLIT; | |
4727 | word->flags |= W_NOSPLIT2; | |
4728 | result = call_expand_word_internal (word, quoted, 0, (int *)NULL, (int *)NULL); | |
4729 | expand_no_split_dollar_star = 0; | |
4730 | ||
4731 | return result; | |
726f6388 JA |
4732 | } |
4733 | ||
726f6388 JA |
4734 | #if defined (PROCESS_SUBSTITUTION) |
4735 | ||
cce855bc JA |
4736 | /*****************************************************************/ |
4737 | /* */ | |
4738 | /* Hacking Process Substitution */ | |
4739 | /* */ | |
4740 | /*****************************************************************/ | |
726f6388 | 4741 | |
726f6388 JA |
4742 | #if !defined (HAVE_DEV_FD) |
4743 | /* Named pipes must be removed explicitly with `unlink'. This keeps a list | |
4744 | of FIFOs the shell has open. unlink_fifo_list will walk the list and | |
4745 | unlink all of them. add_fifo_list adds the name of an open FIFO to the | |
4746 | list. NFIFO is a count of the number of FIFOs in the list. */ | |
4747 | #define FIFO_INCR 20 | |
4748 | ||
f73dda09 JA |
4749 | struct temp_fifo { |
4750 | char *file; | |
4751 | pid_t proc; | |
4752 | }; | |
4753 | ||
4754 | static struct temp_fifo *fifo_list = (struct temp_fifo *)NULL; | |
ccc6cda3 JA |
4755 | static int nfifo; |
4756 | static int fifo_list_size; | |
726f6388 | 4757 | |
495aee44 CR |
4758 | char * |
4759 | copy_fifo_list (sizep) | |
4760 | int *sizep; | |
4761 | { | |
4762 | if (sizep) | |
4763 | *sizep = 0; | |
4764 | return (char *)NULL; | |
4765 | } | |
4766 | ||
726f6388 JA |
4767 | static void |
4768 | add_fifo_list (pathname) | |
4769 | char *pathname; | |
4770 | { | |
4771 | if (nfifo >= fifo_list_size - 1) | |
4772 | { | |
4773 | fifo_list_size += FIFO_INCR; | |
f73dda09 JA |
4774 | fifo_list = (struct temp_fifo *)xrealloc (fifo_list, |
4775 | fifo_list_size * sizeof (struct temp_fifo)); | |
726f6388 JA |
4776 | } |
4777 | ||
f73dda09 JA |
4778 | fifo_list[nfifo].file = savestring (pathname); |
4779 | nfifo++; | |
726f6388 JA |
4780 | } |
4781 | ||
495aee44 CR |
4782 | void |
4783 | unlink_fifo (i) | |
4784 | int i; | |
4785 | { | |
4786 | if ((fifo_list[i].proc == -1) || (kill(fifo_list[i].proc, 0) == -1)) | |
4787 | { | |
4788 | unlink (fifo_list[i].file); | |
4789 | free (fifo_list[i].file); | |
4790 | fifo_list[i].file = (char *)NULL; | |
4791 | fifo_list[i].proc = -1; | |
4792 | } | |
4793 | } | |
4794 | ||
726f6388 JA |
4795 | void |
4796 | unlink_fifo_list () | |
4797 | { | |
f73dda09 JA |
4798 | int saved, i, j; |
4799 | ||
ccc6cda3 | 4800 | if (nfifo == 0) |
726f6388 JA |
4801 | return; |
4802 | ||
f73dda09 | 4803 | for (i = saved = 0; i < nfifo; i++) |
726f6388 | 4804 | { |
f73dda09 JA |
4805 | if ((fifo_list[i].proc == -1) || (kill(fifo_list[i].proc, 0) == -1)) |
4806 | { | |
7117c2d2 JA |
4807 | unlink (fifo_list[i].file); |
4808 | free (fifo_list[i].file); | |
4809 | fifo_list[i].file = (char *)NULL; | |
4810 | fifo_list[i].proc = -1; | |
f73dda09 JA |
4811 | } |
4812 | else | |
7117c2d2 | 4813 | saved++; |
f73dda09 JA |
4814 | } |
4815 | ||
4816 | /* If we didn't remove some of the FIFOs, compact the list. */ | |
4817 | if (saved) | |
4818 | { | |
4819 | for (i = j = 0; i < nfifo; i++) | |
4820 | if (fifo_list[i].file) | |
4821 | { | |
4822 | fifo_list[j].file = fifo_list[i].file; | |
4823 | fifo_list[j].proc = fifo_list[i].proc; | |
4824 | j++; | |
4825 | } | |
4826 | nfifo = j; | |
726f6388 | 4827 | } |
f73dda09 JA |
4828 | else |
4829 | nfifo = 0; | |
726f6388 JA |
4830 | } |
4831 | ||
495aee44 CR |
4832 | /* Take LIST, which is a bitmap denoting active FIFOs in fifo_list |
4833 | from some point in the past, and close all open FIFOs in fifo_list | |
4834 | that are not marked as active in LIST. If LIST is NULL, close | |
4835 | everything in fifo_list. LSIZE is the number of elements in LIST, in | |
4836 | case it's larger than fifo_list_size (size of fifo_list). */ | |
4837 | void | |
4838 | close_new_fifos (list, lsize) | |
4839 | char *list; | |
4840 | int lsize; | |
4841 | { | |
4842 | int i; | |
4843 | ||
4844 | if (list == 0) | |
4845 | { | |
4846 | unlink_fifo_list (); | |
4847 | return; | |
4848 | } | |
4849 | ||
4850 | for (i = 0; i < lsize; i++) | |
4851 | if (list[i] == 0 && i < fifo_list_size && fifo_list[i].proc != -1) | |
4852 | unlink_fifo (i); | |
4853 | ||
4854 | for (i = lsize; i < fifo_list_size; i++) | |
4855 | unlink_fifo (i); | |
4856 | } | |
4857 | ||
f1be666c JA |
4858 | int |
4859 | fifos_pending () | |
4860 | { | |
4861 | return nfifo; | |
4862 | } | |
4863 | ||
495aee44 CR |
4864 | int |
4865 | num_fifos () | |
4866 | { | |
4867 | return nfifo; | |
4868 | } | |
4869 | ||
726f6388 JA |
4870 | static char * |
4871 | make_named_pipe () | |
4872 | { | |
4873 | char *tname; | |
4874 | ||
3185942a | 4875 | tname = sh_mktmpname ("sh-np", MT_USERANDOM|MT_USETMPDIR); |
726f6388 JA |
4876 | if (mkfifo (tname, 0600) < 0) |
4877 | { | |
4878 | free (tname); | |
4879 | return ((char *)NULL); | |
4880 | } | |
4881 | ||
4882 | add_fifo_list (tname); | |
4883 | return (tname); | |
4884 | } | |
4885 | ||
726f6388 JA |
4886 | #else /* HAVE_DEV_FD */ |
4887 | ||
4888 | /* DEV_FD_LIST is a bitmap of file descriptors attached to pipes the shell | |
4889 | has open to children. NFDS is a count of the number of bits currently | |
4890 | set in DEV_FD_LIST. TOTFDS is a count of the highest possible number | |
4891 | of open files. */ | |
4892 | static char *dev_fd_list = (char *)NULL; | |
ccc6cda3 | 4893 | static int nfds; |
726f6388 JA |
4894 | static int totfds; /* The highest possible number of open files. */ |
4895 | ||
495aee44 CR |
4896 | char * |
4897 | copy_fifo_list (sizep) | |
4898 | int *sizep; | |
4899 | { | |
4900 | char *ret; | |
4901 | ||
4902 | if (nfds == 0 || totfds == 0) | |
4903 | { | |
4904 | if (sizep) | |
4905 | *sizep = 0; | |
4906 | return (char *)NULL; | |
4907 | } | |
4908 | ||
4909 | if (sizep) | |
4910 | *sizep = totfds; | |
4911 | ret = (char *)xmalloc (totfds); | |
4912 | return (memcpy (ret, dev_fd_list, totfds)); | |
4913 | } | |
4914 | ||
726f6388 JA |
4915 | static void |
4916 | add_fifo_list (fd) | |
4917 | int fd; | |
4918 | { | |
495aee44 | 4919 | if (dev_fd_list == 0 || fd >= totfds) |
726f6388 JA |
4920 | { |
4921 | int ofds; | |
4922 | ||
4923 | ofds = totfds; | |
4924 | totfds = getdtablesize (); | |
4925 | if (totfds < 0 || totfds > 256) | |
4926 | totfds = 256; | |
3185942a | 4927 | if (fd >= totfds) |
726f6388 JA |
4928 | totfds = fd + 2; |
4929 | ||
f73dda09 | 4930 | dev_fd_list = (char *)xrealloc (dev_fd_list, totfds); |
7117c2d2 | 4931 | memset (dev_fd_list + ofds, '\0', totfds - ofds); |
726f6388 JA |
4932 | } |
4933 | ||
4934 | dev_fd_list[fd] = 1; | |
4935 | nfds++; | |
4936 | } | |
4937 | ||
f1be666c JA |
4938 | int |
4939 | fifos_pending () | |
4940 | { | |
4941 | return 0; /* used for cleanup; not needed with /dev/fd */ | |
4942 | } | |
4943 | ||
495aee44 CR |
4944 | int |
4945 | num_fifos () | |
4946 | { | |
4947 | return nfds; | |
4948 | } | |
4949 | ||
4950 | void | |
4951 | unlink_fifo (fd) | |
4952 | int fd; | |
4953 | { | |
4954 | if (dev_fd_list[fd]) | |
4955 | { | |
4956 | close (fd); | |
4957 | dev_fd_list[fd] = 0; | |
4958 | nfds--; | |
4959 | } | |
4960 | } | |
4961 | ||
726f6388 JA |
4962 | void |
4963 | unlink_fifo_list () | |
4964 | { | |
4965 | register int i; | |
4966 | ||
ccc6cda3 | 4967 | if (nfds == 0) |
726f6388 JA |
4968 | return; |
4969 | ||
4970 | for (i = 0; nfds && i < totfds; i++) | |
495aee44 | 4971 | unlink_fifo (i); |
726f6388 JA |
4972 | |
4973 | nfds = 0; | |
4974 | } | |
4975 | ||
495aee44 CR |
4976 | /* Take LIST, which is a snapshot copy of dev_fd_list from some point in |
4977 | the past, and close all open fds in dev_fd_list that are not marked | |
4978 | as open in LIST. If LIST is NULL, close everything in dev_fd_list. | |
4979 | LSIZE is the number of elements in LIST, in case it's larger than | |
4980 | totfds (size of dev_fd_list). */ | |
4981 | void | |
4982 | close_new_fifos (list, lsize) | |
4983 | char *list; | |
4984 | int lsize; | |
4985 | { | |
4986 | int i; | |
4987 | ||
4988 | if (list == 0) | |
4989 | { | |
4990 | unlink_fifo_list (); | |
4991 | return; | |
4992 | } | |
4993 | ||
4994 | for (i = 0; i < lsize; i++) | |
4995 | if (list[i] == 0 && i < totfds && dev_fd_list[i]) | |
4996 | unlink_fifo (i); | |
4997 | ||
4998 | for (i = lsize; i < totfds; i++) | |
4999 | unlink_fifo (i); | |
5000 | } | |
5001 | ||
726f6388 JA |
5002 | #if defined (NOTDEF) |
5003 | print_dev_fd_list () | |
5004 | { | |
5005 | register int i; | |
5006 | ||
f73dda09 | 5007 | fprintf (stderr, "pid %ld: dev_fd_list:", (long)getpid ()); |
726f6388 JA |
5008 | fflush (stderr); |
5009 | ||
5010 | for (i = 0; i < totfds; i++) | |
5011 | { | |
5012 | if (dev_fd_list[i]) | |
5013 | fprintf (stderr, " %d", i); | |
5014 | } | |
5015 | fprintf (stderr, "\n"); | |
5016 | } | |
5017 | #endif /* NOTDEF */ | |
5018 | ||
5019 | static char * | |
5020 | make_dev_fd_filename (fd) | |
5021 | int fd; | |
5022 | { | |
f73dda09 | 5023 | char *ret, intbuf[INT_STRLEN_BOUND (int) + 1], *p; |
726f6388 | 5024 | |
17345e5a | 5025 | ret = (char *)xmalloc (sizeof (DEV_FD_PREFIX) + 8); |
bb70624e JA |
5026 | |
5027 | strcpy (ret, DEV_FD_PREFIX); | |
5028 | p = inttostr (fd, intbuf, sizeof (intbuf)); | |
5029 | strcpy (ret + sizeof (DEV_FD_PREFIX) - 1, p); | |
5030 | ||
726f6388 JA |
5031 | add_fifo_list (fd); |
5032 | return (ret); | |
5033 | } | |
5034 | ||
5035 | #endif /* HAVE_DEV_FD */ | |
5036 | ||
5037 | /* Return a filename that will open a connection to the process defined by | |
5038 | executing STRING. HAVE_DEV_FD, if defined, means open a pipe and return | |
5039 | a filename in /dev/fd corresponding to a descriptor that is one of the | |
5040 | ends of the pipe. If not defined, we use named pipes on systems that have | |
5041 | them. Systems without /dev/fd and named pipes are out of luck. | |
5042 | ||
5043 | OPEN_FOR_READ_IN_CHILD, if 1, means open the named pipe for reading or | |
5044 | use the read end of the pipe and dup that file descriptor to fd 0 in | |
5045 | the child. If OPEN_FOR_READ_IN_CHILD is 0, we open the named pipe for | |
5046 | writing or use the write end of the pipe in the child, and dup that | |
5047 | file descriptor to fd 1 in the child. The parent does the opposite. */ | |
5048 | ||
5049 | static char * | |
5050 | process_substitute (string, open_for_read_in_child) | |
5051 | char *string; | |
5052 | int open_for_read_in_child; | |
5053 | { | |
5054 | char *pathname; | |
5055 | int fd, result; | |
5056 | pid_t old_pid, pid; | |
5057 | #if defined (HAVE_DEV_FD) | |
5058 | int parent_pipe_fd, child_pipe_fd; | |
5059 | int fildes[2]; | |
5060 | #endif /* HAVE_DEV_FD */ | |
5061 | #if defined (JOB_CONTROL) | |
5062 | pid_t old_pipeline_pgrp; | |
ccc6cda3 | 5063 | #endif |
726f6388 | 5064 | |
cce855bc | 5065 | if (!string || !*string || wordexp_only) |
726f6388 JA |
5066 | return ((char *)NULL); |
5067 | ||
5068 | #if !defined (HAVE_DEV_FD) | |
5069 | pathname = make_named_pipe (); | |
5070 | #else /* HAVE_DEV_FD */ | |
5071 | if (pipe (fildes) < 0) | |
5072 | { | |
b80f6443 | 5073 | sys_error (_("cannot make pipe for process substitution")); |
726f6388 JA |
5074 | return ((char *)NULL); |
5075 | } | |
5076 | /* If OPEN_FOR_READ_IN_CHILD == 1, we want to use the write end of | |
5077 | the pipe in the parent, otherwise the read end. */ | |
5078 | parent_pipe_fd = fildes[open_for_read_in_child]; | |
5079 | child_pipe_fd = fildes[1 - open_for_read_in_child]; | |
d166f048 JA |
5080 | /* Move the parent end of the pipe to some high file descriptor, to |
5081 | avoid clashes with FDs used by the script. */ | |
5082 | parent_pipe_fd = move_to_high_fd (parent_pipe_fd, 1, 64); | |
5083 | ||
726f6388 JA |
5084 | pathname = make_dev_fd_filename (parent_pipe_fd); |
5085 | #endif /* HAVE_DEV_FD */ | |
5086 | ||
3185942a | 5087 | if (pathname == 0) |
726f6388 | 5088 | { |
b80f6443 | 5089 | sys_error (_("cannot make pipe for process substitution")); |
726f6388 JA |
5090 | return ((char *)NULL); |
5091 | } | |
5092 | ||
5093 | old_pid = last_made_pid; | |
5094 | ||
5095 | #if defined (JOB_CONTROL) | |
5096 | old_pipeline_pgrp = pipeline_pgrp; | |
5097 | pipeline_pgrp = shell_pgrp; | |
ccc6cda3 | 5098 | save_pipeline (1); |
ccc6cda3 JA |
5099 | #endif /* JOB_CONTROL */ |
5100 | ||
726f6388 JA |
5101 | pid = make_child ((char *)NULL, 1); |
5102 | if (pid == 0) | |
5103 | { | |
ccc6cda3 | 5104 | reset_terminating_signals (); /* XXX */ |
b80f6443 | 5105 | free_pushed_string_input (); |
726f6388 | 5106 | /* Cancel traps, in trap.c. */ |
495aee44 | 5107 | restore_original_signals (); /* XXX - what about special builtins? bash-4.2 */ |
726f6388 | 5108 | setup_async_signals (); |
3185942a | 5109 | subshell_environment |= SUBSHELL_COMSUB|SUBSHELL_PROCSUB; |
726f6388 | 5110 | } |
ccc6cda3 JA |
5111 | |
5112 | #if defined (JOB_CONTROL) | |
726f6388 JA |
5113 | set_sigchld_handler (); |
5114 | stop_making_children (); | |
3185942a | 5115 | /* XXX - should we only do this in the parent? (as in command subst) */ |
726f6388 | 5116 | pipeline_pgrp = old_pipeline_pgrp; |
ccc6cda3 | 5117 | #endif /* JOB_CONTROL */ |
726f6388 JA |
5118 | |
5119 | if (pid < 0) | |
5120 | { | |
b80f6443 | 5121 | sys_error (_("cannot make child for process substitution")); |
726f6388 JA |
5122 | free (pathname); |
5123 | #if defined (HAVE_DEV_FD) | |
5124 | close (parent_pipe_fd); | |
5125 | close (child_pipe_fd); | |
5126 | #endif /* HAVE_DEV_FD */ | |
5127 | return ((char *)NULL); | |
5128 | } | |
5129 | ||
5130 | if (pid > 0) | |
5131 | { | |
ccc6cda3 JA |
5132 | #if defined (JOB_CONTROL) |
5133 | restore_pipeline (1); | |
5134 | #endif | |
5135 | ||
f73dda09 JA |
5136 | #if !defined (HAVE_DEV_FD) |
5137 | fifo_list[nfifo-1].proc = pid; | |
5138 | #endif | |
5139 | ||
726f6388 JA |
5140 | last_made_pid = old_pid; |
5141 | ||
5142 | #if defined (JOB_CONTROL) && defined (PGRP_PIPE) | |
5143 | close_pgrp_pipe (); | |
5144 | #endif /* JOB_CONTROL && PGRP_PIPE */ | |
5145 | ||
5146 | #if defined (HAVE_DEV_FD) | |
5147 | close (child_pipe_fd); | |
5148 | #endif /* HAVE_DEV_FD */ | |
5149 | ||
5150 | return (pathname); | |
5151 | } | |
5152 | ||
5153 | set_sigint_handler (); | |
5154 | ||
5155 | #if defined (JOB_CONTROL) | |
5156 | set_job_control (0); | |
5157 | #endif /* JOB_CONTROL */ | |
5158 | ||
5159 | #if !defined (HAVE_DEV_FD) | |
5160 | /* Open the named pipe in the child. */ | |
ac50fbac | 5161 | fd = open (pathname, open_for_read_in_child ? O_RDONLY : O_WRONLY); |
726f6388 JA |
5162 | if (fd < 0) |
5163 | { | |
b80f6443 JA |
5164 | /* Two separate strings for ease of translation. */ |
5165 | if (open_for_read_in_child) | |
5166 | sys_error (_("cannot open named pipe %s for reading"), pathname); | |
5167 | else | |
5168 | sys_error (_("cannot open named pipe %s for writing"), pathname); | |
5169 | ||
726f6388 JA |
5170 | exit (127); |
5171 | } | |
bb70624e JA |
5172 | if (open_for_read_in_child) |
5173 | { | |
28ef6c31 | 5174 | if (sh_unset_nodelay_mode (fd) < 0) |
bb70624e | 5175 | { |
3185942a | 5176 | sys_error (_("cannot reset nodelay mode for fd %d"), fd); |
bb70624e JA |
5177 | exit (127); |
5178 | } | |
5179 | } | |
726f6388 JA |
5180 | #else /* HAVE_DEV_FD */ |
5181 | fd = child_pipe_fd; | |
5182 | #endif /* HAVE_DEV_FD */ | |
5183 | ||
5184 | if (dup2 (fd, open_for_read_in_child ? 0 : 1) < 0) | |
5185 | { | |
b80f6443 | 5186 | sys_error (_("cannot duplicate named pipe %s as fd %d"), pathname, |
ccc6cda3 | 5187 | open_for_read_in_child ? 0 : 1); |
726f6388 JA |
5188 | exit (127); |
5189 | } | |
5190 | ||
f73dda09 JA |
5191 | if (fd != (open_for_read_in_child ? 0 : 1)) |
5192 | close (fd); | |
726f6388 JA |
5193 | |
5194 | /* Need to close any files that this process has open to pipes inherited | |
5195 | from its parent. */ | |
5196 | if (current_fds_to_close) | |
5197 | { | |
5198 | close_fd_bitmap (current_fds_to_close); | |
5199 | current_fds_to_close = (struct fd_bitmap *)NULL; | |
5200 | } | |
5201 | ||
5202 | #if defined (HAVE_DEV_FD) | |
5203 | /* Make sure we close the parent's end of the pipe and clear the slot | |
5204 | in the fd list so it is not closed later, if reallocated by, for | |
5205 | instance, pipe(2). */ | |
5206 | close (parent_pipe_fd); | |
5207 | dev_fd_list[parent_pipe_fd] = 0; | |
5208 | #endif /* HAVE_DEV_FD */ | |
5209 | ||
8dea6e87 CR |
5210 | /* subshells shouldn't have this flag, which controls using the temporary |
5211 | environment for variable lookups. */ | |
5212 | expanding_redir = 0; | |
5213 | ||
d166f048 | 5214 | result = parse_and_execute (string, "process substitution", (SEVAL_NONINT|SEVAL_NOHIST)); |
726f6388 JA |
5215 | |
5216 | #if !defined (HAVE_DEV_FD) | |
5217 | /* Make sure we close the named pipe in the child before we exit. */ | |
5218 | close (open_for_read_in_child ? 0 : 1); | |
5219 | #endif /* !HAVE_DEV_FD */ | |
5220 | ||
ac50fbac CR |
5221 | last_command_exit_value = result; |
5222 | result = run_exit_trap (); | |
726f6388 JA |
5223 | exit (result); |
5224 | /*NOTREACHED*/ | |
5225 | } | |
5226 | #endif /* PROCESS_SUBSTITUTION */ | |
5227 | ||
cce855bc JA |
5228 | /***********************************/ |
5229 | /* */ | |
5230 | /* Command Substitution */ | |
5231 | /* */ | |
5232 | /***********************************/ | |
5233 | ||
d166f048 | 5234 | static char * |
3185942a | 5235 | read_comsub (fd, quoted, rflag) |
d166f048 | 5236 | int fd, quoted; |
3185942a | 5237 | int *rflag; |
d166f048 | 5238 | { |
3185942a JA |
5239 | char *istring, buf[128], *bufp, *s; |
5240 | int istring_index, istring_size, c, tflag, skip_ctlesc, skip_ctlnul; | |
f73dda09 | 5241 | ssize_t bufn; |
d166f048 JA |
5242 | |
5243 | istring = (char *)NULL; | |
3185942a JA |
5244 | istring_index = istring_size = bufn = tflag = 0; |
5245 | ||
5246 | for (skip_ctlesc = skip_ctlnul = 0, s = ifs_value; s && *s; s++) | |
5247 | skip_ctlesc |= *s == CTLESC, skip_ctlnul |= *s == CTLNUL; | |
d166f048 | 5248 | |
3185942a JA |
5249 | /* Read the output of the command through the pipe. This may need to be |
5250 | changed to understand multibyte characters in the future. */ | |
d166f048 JA |
5251 | while (1) |
5252 | { | |
5253 | if (fd < 0) | |
28ef6c31 | 5254 | break; |
d166f048 JA |
5255 | if (--bufn <= 0) |
5256 | { | |
bb70624e | 5257 | bufn = zread (fd, buf, sizeof (buf)); |
d166f048 JA |
5258 | if (bufn <= 0) |
5259 | break; | |
5260 | bufp = buf; | |
5261 | } | |
5262 | c = *bufp++; | |
5263 | ||
28ef6c31 JA |
5264 | if (c == 0) |
5265 | { | |
5266 | #if 0 | |
5267 | internal_warning ("read_comsub: ignored null byte in input"); | |
5268 | #endif | |
5269 | continue; | |
5270 | } | |
5271 | ||
d166f048 JA |
5272 | /* Add the character to ISTRING, possibly after resizing it. */ |
5273 | RESIZE_MALLOCED_BUFFER (istring, istring_index, 2, istring_size, DEFAULT_ARRAY_SIZE); | |
5274 | ||
f1be666c JA |
5275 | /* This is essentially quote_string inline */ |
5276 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) /* || c == CTLESC || c == CTLNUL */) | |
5277 | istring[istring_index++] = CTLESC; | |
5278 | /* Escape CTLESC and CTLNUL in the output to protect those characters | |
5279 | from the rest of the word expansions (word splitting and globbing.) | |
5280 | This is essentially quote_escapes inline. */ | |
3185942a JA |
5281 | else if (skip_ctlesc == 0 && c == CTLESC) |
5282 | { | |
5283 | tflag |= W_HASCTLESC; | |
5284 | istring[istring_index++] = CTLESC; | |
5285 | } | |
5286 | else if ((skip_ctlnul == 0 && c == CTLNUL) || (c == ' ' && (ifs_value && *ifs_value == 0))) | |
d166f048 JA |
5287 | istring[istring_index++] = CTLESC; |
5288 | ||
5289 | istring[istring_index++] = c; | |
28ef6c31 JA |
5290 | |
5291 | #if 0 | |
5292 | #if defined (__CYGWIN__) | |
5293 | if (c == '\n' && istring_index > 1 && istring[istring_index - 2] == '\r') | |
5294 | { | |
5295 | istring_index--; | |
5296 | istring[istring_index - 1] = '\n'; | |
5297 | } | |
5298 | #endif | |
5299 | #endif | |
d166f048 JA |
5300 | } |
5301 | ||
5302 | if (istring) | |
5303 | istring[istring_index] = '\0'; | |
5304 | ||
5305 | /* If we read no output, just return now and save ourselves some | |
5306 | trouble. */ | |
5307 | if (istring_index == 0) | |
5308 | { | |
5309 | FREE (istring); | |
3185942a JA |
5310 | if (rflag) |
5311 | *rflag = tflag; | |
d166f048 JA |
5312 | return (char *)NULL; |
5313 | } | |
5314 | ||
5315 | /* Strip trailing newlines from the output of the command. */ | |
5316 | if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) | |
5317 | { | |
5318 | while (istring_index > 0) | |
5319 | { | |
5320 | if (istring[istring_index - 1] == '\n') | |
5321 | { | |
5322 | --istring_index; | |
5323 | ||
5324 | /* If the newline was quoted, remove the quoting char. */ | |
5325 | if (istring[istring_index - 1] == CTLESC) | |
5326 | --istring_index; | |
5327 | } | |
5328 | else | |
5329 | break; | |
5330 | } | |
5331 | istring[istring_index] = '\0'; | |
5332 | } | |
5333 | else | |
5334 | strip_trailing (istring, istring_index - 1, 1); | |
5335 | ||
3185942a JA |
5336 | if (rflag) |
5337 | *rflag = tflag; | |
d166f048 JA |
5338 | return istring; |
5339 | } | |
5340 | ||
3185942a JA |
5341 | /* Perform command substitution on STRING. This returns a WORD_DESC * with the |
5342 | contained string possibly quoted. */ | |
5343 | WORD_DESC * | |
726f6388 JA |
5344 | command_substitute (string, quoted) |
5345 | char *string; | |
5346 | int quoted; | |
5347 | { | |
95732b49 | 5348 | pid_t pid, old_pid, old_pipeline_pgrp, old_async_pid; |
ccc6cda3 | 5349 | char *istring; |
3185942a JA |
5350 | int result, fildes[2], function_value, pflags, rc, tflag; |
5351 | WORD_DESC *ret; | |
726f6388 | 5352 | |
ccc6cda3 | 5353 | istring = (char *)NULL; |
726f6388 JA |
5354 | |
5355 | /* Don't fork () if there is no need to. In the case of no command to | |
5356 | run, just return NULL. */ | |
5357 | if (!string || !*string || (string[0] == '\n' && !string[1])) | |
3185942a | 5358 | return ((WORD_DESC *)NULL); |
726f6388 | 5359 | |
cce855bc JA |
5360 | if (wordexp_only && read_but_dont_execute) |
5361 | { | |
0001803f | 5362 | last_command_exit_value = EX_WEXPCOMSUB; |
cce855bc JA |
5363 | jump_to_top_level (EXITPROG); |
5364 | } | |
5365 | ||
bb70624e JA |
5366 | /* We're making the assumption here that the command substitution will |
5367 | eventually run a command from the file system. Since we'll run | |
5368 | maybe_make_export_env in this subshell before executing that command, | |
5369 | the parent shell and any other shells it starts will have to remake | |
5370 | the environment. If we make it before we fork, other shells won't | |
5371 | have to. Don't bother if we have any temporary variable assignments, | |
5372 | though, because the export environment will be remade after this | |
5373 | command completes anyway, but do it if all the words to be expanded | |
5374 | are variable assignments. */ | |
5375 | if (subst_assign_varlist == 0 || garglist == 0) | |
5376 | maybe_make_export_env (); /* XXX */ | |
5377 | ||
b80f6443 | 5378 | /* Flags to pass to parse_and_execute() */ |
0001803f | 5379 | pflags = (interactive && sourcelevel == 0) ? SEVAL_RESETLINE : 0; |
b80f6443 | 5380 | |
726f6388 JA |
5381 | /* Pipe the output of executing STRING into the current shell. */ |
5382 | if (pipe (fildes) < 0) | |
5383 | { | |
b80f6443 | 5384 | sys_error (_("cannot make pipe for command substitution")); |
726f6388 JA |
5385 | goto error_exit; |
5386 | } | |
5387 | ||
5388 | old_pid = last_made_pid; | |
5389 | #if defined (JOB_CONTROL) | |
ccc6cda3 | 5390 | old_pipeline_pgrp = pipeline_pgrp; |
28ef6c31 JA |
5391 | /* Don't reset the pipeline pgrp if we're already a subshell in a pipeline. */ |
5392 | if ((subshell_environment & SUBSHELL_PIPE) == 0) | |
5393 | pipeline_pgrp = shell_pgrp; | |
ccc6cda3 | 5394 | cleanup_the_pipeline (); |
95732b49 | 5395 | #endif /* JOB_CONTROL */ |
726f6388 | 5396 | |
95732b49 | 5397 | old_async_pid = last_asynchronous_pid; |
95732b49 | 5398 | pid = make_child ((char *)NULL, subshell_environment&SUBSHELL_ASYNC); |
95732b49 JA |
5399 | last_asynchronous_pid = old_async_pid; |
5400 | ||
726f6388 | 5401 | if (pid == 0) |
495aee44 CR |
5402 | { |
5403 | /* Reset the signal handlers in the child, but don't free the | |
5404 | trap strings. Set a flag noting that we have to free the | |
5405 | trap strings if we run trap to change a signal disposition. */ | |
5406 | reset_signal_handlers (); | |
5407 | subshell_environment |= SUBSHELL_RESETTRAP; | |
5408 | } | |
ccc6cda3 JA |
5409 | |
5410 | #if defined (JOB_CONTROL) | |
3185942a | 5411 | /* XXX DO THIS ONLY IN PARENT ? XXX */ |
ccc6cda3 JA |
5412 | set_sigchld_handler (); |
5413 | stop_making_children (); | |
f1be666c JA |
5414 | if (pid != 0) |
5415 | pipeline_pgrp = old_pipeline_pgrp; | |
f73dda09 JA |
5416 | #else |
5417 | stop_making_children (); | |
ccc6cda3 | 5418 | #endif /* JOB_CONTROL */ |
726f6388 JA |
5419 | |
5420 | if (pid < 0) | |
5421 | { | |
b80f6443 | 5422 | sys_error (_("cannot make child for command substitution")); |
726f6388 JA |
5423 | error_exit: |
5424 | ||
ac50fbac CR |
5425 | last_made_pid = old_pid; |
5426 | ||
726f6388 JA |
5427 | FREE (istring); |
5428 | close (fildes[0]); | |
5429 | close (fildes[1]); | |
3185942a | 5430 | return ((WORD_DESC *)NULL); |
726f6388 JA |
5431 | } |
5432 | ||
5433 | if (pid == 0) | |
5434 | { | |
5435 | set_sigint_handler (); /* XXX */ | |
28ef6c31 | 5436 | |
b80f6443 JA |
5437 | free_pushed_string_input (); |
5438 | ||
726f6388 JA |
5439 | if (dup2 (fildes[1], 1) < 0) |
5440 | { | |
b80f6443 | 5441 | sys_error (_("command_substitute: cannot duplicate pipe as fd 1")); |
726f6388 JA |
5442 | exit (EXECUTION_FAILURE); |
5443 | } | |
5444 | ||
5445 | /* If standard output is closed in the parent shell | |
5446 | (such as after `exec >&-'), file descriptor 1 will be | |
5447 | the lowest available file descriptor, and end up in | |
5448 | fildes[0]. This can happen for stdin and stderr as well, | |
5449 | but stdout is more important -- it will cause no output | |
5450 | to be generated from this command. */ | |
5451 | if ((fildes[1] != fileno (stdin)) && | |
5452 | (fildes[1] != fileno (stdout)) && | |
5453 | (fildes[1] != fileno (stderr))) | |
5454 | close (fildes[1]); | |
5455 | ||
5456 | if ((fildes[0] != fileno (stdin)) && | |
5457 | (fildes[0] != fileno (stdout)) && | |
5458 | (fildes[0] != fileno (stderr))) | |
5459 | close (fildes[0]); | |
5460 | ||
495aee44 CR |
5461 | #ifdef __CYGWIN__ |
5462 | /* Let stdio know the fd may have changed from text to binary mode, and | |
5463 | make sure to preserve stdout line buffering. */ | |
5464 | freopen (NULL, "w", stdout); | |
5465 | sh_setlinebuf (stdout); | |
5466 | #endif /* __CYGWIN__ */ | |
5467 | ||
726f6388 JA |
5468 | /* The currently executing shell is not interactive. */ |
5469 | interactive = 0; | |
5470 | ||
ccc6cda3 | 5471 | /* This is a subshell environment. */ |
28ef6c31 | 5472 | subshell_environment |= SUBSHELL_COMSUB; |
ccc6cda3 | 5473 | |
28ef6c31 | 5474 | /* When not in POSIX mode, command substitution does not inherit |
7117c2d2 | 5475 | the -e flag. */ |
28ef6c31 | 5476 | if (posixly_correct == 0) |
ac50fbac CR |
5477 | { |
5478 | builtin_ignoring_errexit = 0; | |
5479 | change_flag ('e', FLAG_OFF); | |
5480 | set_shellopts (); | |
5481 | } | |
726f6388 JA |
5482 | |
5483 | remove_quoted_escapes (string); | |
5484 | ||
ccc6cda3 | 5485 | startup_state = 2; /* see if we can avoid a fork */ |
726f6388 JA |
5486 | /* Give command substitution a place to jump back to on failure, |
5487 | so we don't go back up to main (). */ | |
ac50fbac | 5488 | result = setjmp_nosigs (top_level); |
726f6388 | 5489 | |
bb70624e JA |
5490 | /* If we're running a command substitution inside a shell function, |
5491 | trap `return' so we don't return from the function in the subshell | |
5492 | and go off to never-never land. */ | |
5493 | if (result == 0 && return_catch_flag) | |
ac50fbac | 5494 | function_value = setjmp_nosigs (return_catch); |
bb70624e JA |
5495 | else |
5496 | function_value = 0; | |
5497 | ||
b80f6443 JA |
5498 | if (result == ERREXIT) |
5499 | rc = last_command_exit_value; | |
5500 | else if (result == EXITPROG) | |
5501 | rc = last_command_exit_value; | |
726f6388 | 5502 | else if (result) |
b80f6443 | 5503 | rc = EXECUTION_FAILURE; |
bb70624e | 5504 | else if (function_value) |
b80f6443 | 5505 | rc = return_catch_value; |
726f6388 | 5506 | else |
b80f6443 JA |
5507 | { |
5508 | subshell_level++; | |
5509 | rc = parse_and_execute (string, "command substitution", pflags|SEVAL_NOHIST); | |
5510 | subshell_level--; | |
5511 | } | |
5512 | ||
5513 | last_command_exit_value = rc; | |
5514 | rc = run_exit_trap (); | |
f1be666c JA |
5515 | #if defined (PROCESS_SUBSTITUTION) |
5516 | unlink_fifo_list (); | |
5517 | #endif | |
b80f6443 | 5518 | exit (rc); |
726f6388 JA |
5519 | } |
5520 | else | |
5521 | { | |
726f6388 JA |
5522 | #if defined (JOB_CONTROL) && defined (PGRP_PIPE) |
5523 | close_pgrp_pipe (); | |
5524 | #endif /* JOB_CONTROL && PGRP_PIPE */ | |
5525 | ||
5526 | close (fildes[1]); | |
5527 | ||
3185942a JA |
5528 | tflag = 0; |
5529 | istring = read_comsub (fildes[0], quoted, &tflag); | |
ccc6cda3 | 5530 | |
726f6388 JA |
5531 | close (fildes[0]); |
5532 | ||
b72432fd | 5533 | current_command_subst_pid = pid; |
726f6388 JA |
5534 | last_command_exit_value = wait_for (pid); |
5535 | last_command_subst_pid = pid; | |
5536 | last_made_pid = old_pid; | |
5537 | ||
5538 | #if defined (JOB_CONTROL) | |
5539 | /* If last_command_exit_value > 128, then the substituted command | |
5540 | was terminated by a signal. If that signal was SIGINT, then send | |
5541 | SIGINT to ourselves. This will break out of loops, for instance. */ | |
b80f6443 | 5542 | if (last_command_exit_value == (128 + SIGINT) && last_command_exit_signal == SIGINT) |
726f6388 JA |
5543 | kill (getpid (), SIGINT); |
5544 | ||
5545 | /* wait_for gives the terminal back to shell_pgrp. If some other | |
cce855bc JA |
5546 | process group should have it, give it away to that group here. |
5547 | pipeline_pgrp is non-zero only while we are constructing a | |
ac50fbac | 5548 | pipeline, so what we are concerned about is whether or not that |
cce855bc JA |
5549 | pipeline was started in the background. A pipeline started in |
5550 | the background should never get the tty back here. */ | |
28ef6c31 | 5551 | if (interactive && pipeline_pgrp != (pid_t)0 && (subshell_environment & SUBSHELL_ASYNC) == 0) |
28ef6c31 | 5552 | give_terminal_to (pipeline_pgrp, 0); |
726f6388 JA |
5553 | #endif /* JOB_CONTROL */ |
5554 | ||
3185942a JA |
5555 | ret = alloc_word_desc (); |
5556 | ret->word = istring; | |
5557 | ret->flags = tflag; | |
5558 | ||
5559 | return ret; | |
726f6388 JA |
5560 | } |
5561 | } | |
5562 | ||
5563 | /******************************************************** | |
5564 | * * | |
5565 | * Utility functions for parameter expansion * | |
5566 | * * | |
5567 | ********************************************************/ | |
5568 | ||
ccc6cda3 | 5569 | #if defined (ARRAY_VARS) |
ccc6cda3 | 5570 | |
f73dda09 | 5571 | static arrayind_t |
ccc6cda3 JA |
5572 | array_length_reference (s) |
5573 | char *s; | |
5574 | { | |
f73dda09 JA |
5575 | int len; |
5576 | arrayind_t ind; | |
3185942a | 5577 | char *akey; |
f73dda09 | 5578 | char *t, c; |
ccc6cda3 | 5579 | ARRAY *array; |
495aee44 | 5580 | HASH_TABLE *h; |
ccc6cda3 JA |
5581 | SHELL_VAR *var; |
5582 | ||
5583 | var = array_variable_part (s, &t, &len); | |
726f6388 | 5584 | |
ccc6cda3 JA |
5585 | /* If unbound variables should generate an error, report one and return |
5586 | failure. */ | |
ac50fbac | 5587 | if ((var == 0 || invisible_p (var) || (assoc_p (var) == 0 && array_p (var) == 0)) && unbound_vars_is_error) |
726f6388 | 5588 | { |
f73dda09 | 5589 | c = *--t; |
ccc6cda3 | 5590 | *t = '\0'; |
0001803f | 5591 | last_command_exit_value = EXECUTION_FAILURE; |
7117c2d2 | 5592 | err_unboundvar (s); |
f73dda09 | 5593 | *t = c; |
ccc6cda3 | 5594 | return (-1); |
726f6388 | 5595 | } |
ac50fbac | 5596 | else if (var == 0 || invisible_p (var)) |
ccc6cda3 | 5597 | return 0; |
726f6388 | 5598 | |
28ef6c31 JA |
5599 | /* We support a couple of expansions for variables that are not arrays. |
5600 | We'll return the length of the value for v[0], and 1 for v[@] or | |
5601 | v[*]. Return 0 for everything else. */ | |
5602 | ||
5603 | array = array_p (var) ? array_cell (var) : (ARRAY *)NULL; | |
495aee44 | 5604 | h = assoc_p (var) ? assoc_cell (var) : (HASH_TABLE *)NULL; |
726f6388 | 5605 | |
ccc6cda3 | 5606 | if (ALL_ELEMENT_SUB (t[0]) && t[1] == ']') |
ccc6cda3 | 5607 | { |
3185942a | 5608 | if (assoc_p (var)) |
495aee44 | 5609 | return (h ? assoc_num_elements (h) : 0); |
3185942a | 5610 | else if (array_p (var)) |
495aee44 | 5611 | return (array ? array_num_elements (array) : 0); |
3185942a | 5612 | else |
495aee44 | 5613 | return (var_isset (var) ? 1 : 0); |
ccc6cda3 | 5614 | } |
ccc6cda3 | 5615 | |
3185942a JA |
5616 | if (assoc_p (var)) |
5617 | { | |
5618 | t[len - 1] = '\0'; | |
5619 | akey = expand_assignment_string_to_string (t, 0); /* [ */ | |
5620 | t[len - 1] = ']'; | |
5621 | if (akey == 0 || *akey == 0) | |
5622 | { | |
5623 | err_badarraysub (t); | |
ac50fbac | 5624 | FREE (akey); |
3185942a JA |
5625 | return (-1); |
5626 | } | |
5627 | t = assoc_reference (assoc_cell (var), akey); | |
ac50fbac | 5628 | free (akey); |
3185942a | 5629 | } |
28ef6c31 | 5630 | else |
3185942a | 5631 | { |
ac50fbac CR |
5632 | ind = array_expand_index (var, t, len); |
5633 | /* negative subscripts to indexed arrays count back from end */ | |
5634 | if (var && array_p (var) && ind < 0) | |
5635 | ind = array_max_index (array_cell (var)) + 1 + ind; | |
3185942a JA |
5636 | if (ind < 0) |
5637 | { | |
5638 | err_badarraysub (t); | |
5639 | return (-1); | |
5640 | } | |
5641 | if (array_p (var)) | |
5642 | t = array_reference (array, ind); | |
5643 | else | |
5644 | t = (ind == 0) ? value_cell (var) : (char *)NULL; | |
5645 | } | |
28ef6c31 | 5646 | |
f1be666c | 5647 | len = MB_STRLEN (t); |
ccc6cda3 | 5648 | return (len); |
726f6388 | 5649 | } |
ccc6cda3 | 5650 | #endif /* ARRAY_VARS */ |
726f6388 JA |
5651 | |
5652 | static int | |
5653 | valid_brace_expansion_word (name, var_is_special) | |
5654 | char *name; | |
5655 | int var_is_special; | |
5656 | { | |
f73dda09 | 5657 | if (DIGIT (*name) && all_digits (name)) |
726f6388 JA |
5658 | return 1; |
5659 | else if (var_is_special) | |
5660 | return 1; | |
ccc6cda3 JA |
5661 | #if defined (ARRAY_VARS) |
5662 | else if (valid_array_reference (name)) | |
5663 | return 1; | |
5664 | #endif /* ARRAY_VARS */ | |
726f6388 JA |
5665 | else if (legal_identifier (name)) |
5666 | return 1; | |
5667 | else | |
5668 | return 0; | |
5669 | } | |
ccc6cda3 | 5670 | |
b80f6443 JA |
5671 | static int |
5672 | chk_atstar (name, quoted, quoted_dollar_atp, contains_dollar_at) | |
5673 | char *name; | |
5674 | int quoted; | |
5675 | int *quoted_dollar_atp, *contains_dollar_at; | |
5676 | { | |
5677 | char *temp1; | |
5678 | ||
5679 | if (name == 0) | |
5680 | { | |
5681 | if (quoted_dollar_atp) | |
5682 | *quoted_dollar_atp = 0; | |
5683 | if (contains_dollar_at) | |
5684 | *contains_dollar_at = 0; | |
5685 | return 0; | |
5686 | } | |
5687 | ||
5688 | /* check for $@ and $* */ | |
5689 | if (name[0] == '@' && name[1] == 0) | |
5690 | { | |
5691 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp) | |
5692 | *quoted_dollar_atp = 1; | |
5693 | if (contains_dollar_at) | |
5694 | *contains_dollar_at = 1; | |
5695 | return 1; | |
5696 | } | |
5697 | else if (name[0] == '*' && name[1] == '\0' && quoted == 0) | |
5698 | { | |
5699 | if (contains_dollar_at) | |
5700 | *contains_dollar_at = 1; | |
5701 | return 1; | |
5702 | } | |
5703 | ||
5704 | /* Now check for ${array[@]} and ${array[*]} */ | |
5705 | #if defined (ARRAY_VARS) | |
5706 | else if (valid_array_reference (name)) | |
5707 | { | |
0001803f | 5708 | temp1 = mbschr (name, '['); |
b80f6443 JA |
5709 | if (temp1 && temp1[1] == '@' && temp1[2] == ']') |
5710 | { | |
5711 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp) | |
5712 | *quoted_dollar_atp = 1; | |
5713 | if (contains_dollar_at) | |
5714 | *contains_dollar_at = 1; | |
5715 | return 1; | |
5716 | } /* [ */ | |
5717 | /* ${array[*]}, when unquoted, should be treated like ${array[@]}, | |
5718 | which should result in separate words even when IFS is unset. */ | |
5719 | if (temp1 && temp1[1] == '*' && temp1[2] == ']' && quoted == 0) | |
5720 | { | |
5721 | if (contains_dollar_at) | |
5722 | *contains_dollar_at = 1; | |
5723 | return 1; | |
5724 | } | |
5725 | } | |
5726 | #endif | |
5727 | return 0; | |
5728 | } | |
5729 | ||
726f6388 JA |
5730 | /* Parameter expand NAME, and return a new string which is the expansion, |
5731 | or NULL if there was no expansion. | |
5732 | VAR_IS_SPECIAL is non-zero if NAME is one of the special variables in | |
5733 | the shell, e.g., "@", "$", "*", etc. QUOTED, if non-zero, means that | |
5734 | NAME was found inside of a double-quoted expression. */ | |
95732b49 | 5735 | static WORD_DESC * |
495aee44 | 5736 | parameter_brace_expand_word (name, var_is_special, quoted, pflags, indp) |
726f6388 | 5737 | char *name; |
89a92869 | 5738 | int var_is_special, quoted, pflags; |
495aee44 | 5739 | arrayind_t *indp; |
726f6388 | 5740 | { |
95732b49 | 5741 | WORD_DESC *ret; |
ccc6cda3 | 5742 | char *temp, *tt; |
7117c2d2 | 5743 | intmax_t arg_index; |
ccc6cda3 | 5744 | SHELL_VAR *var; |
f1be666c | 5745 | int atype, rflags; |
495aee44 | 5746 | arrayind_t ind; |
726f6388 | 5747 | |
95732b49 JA |
5748 | ret = 0; |
5749 | temp = 0; | |
f1be666c | 5750 | rflags = 0; |
95732b49 | 5751 | |
495aee44 CR |
5752 | if (indp) |
5753 | *indp = INTMAX_MIN; | |
5754 | ||
95732b49 | 5755 | /* Handle multiple digit arguments, as in ${11}. */ |
f73dda09 | 5756 | if (legal_number (name, &arg_index)) |
7117c2d2 JA |
5757 | { |
5758 | tt = get_dollar_var_value (arg_index); | |
b80f6443 JA |
5759 | if (tt) |
5760 | temp = (*tt && (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))) | |
5761 | ? quote_string (tt) | |
5762 | : quote_escapes (tt); | |
5763 | else | |
5764 | temp = (char *)NULL; | |
7117c2d2 JA |
5765 | FREE (tt); |
5766 | } | |
726f6388 JA |
5767 | else if (var_is_special) /* ${@} */ |
5768 | { | |
cce855bc | 5769 | int sindex; |
f73dda09 | 5770 | tt = (char *)xmalloc (2 + strlen (name)); |
cce855bc | 5771 | tt[sindex = 0] = '$'; |
726f6388 | 5772 | strcpy (tt + 1, name); |
7117c2d2 | 5773 | |
95732b49 | 5774 | ret = param_expand (tt, &sindex, quoted, (int *)NULL, (int *)NULL, |
89a92869 | 5775 | (int *)NULL, (int *)NULL, pflags); |
cce855bc | 5776 | free (tt); |
726f6388 | 5777 | } |
ccc6cda3 JA |
5778 | #if defined (ARRAY_VARS) |
5779 | else if (valid_array_reference (name)) | |
5780 | { | |
ac50fbac CR |
5781 | expand_arrayref: |
5782 | /* XXX - does this leak if name[@] or name[*]? */ | |
5783 | if (pflags & PF_ASSIGNRHS) | |
5784 | { | |
5785 | temp = array_variable_name (name, &tt, (int *)0); | |
5786 | if (ALL_ELEMENT_SUB (tt[0]) && tt[1] == ']') | |
5787 | temp = array_value (name, quoted|Q_DOUBLE_QUOTES, 0, &atype, &ind); | |
5788 | else | |
5789 | temp = array_value (name, quoted, 0, &atype, &ind); | |
5790 | } | |
5791 | else | |
5792 | temp = array_value (name, quoted, 0, &atype, &ind); | |
7117c2d2 | 5793 | if (atype == 0 && temp) |
495aee44 CR |
5794 | { |
5795 | temp = (*temp && (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))) | |
5796 | ? quote_string (temp) | |
5797 | : quote_escapes (temp); | |
5798 | rflags |= W_ARRAYIND; | |
5799 | if (indp) | |
5800 | *indp = ind; | |
5801 | } | |
f1be666c JA |
5802 | else if (atype == 1 && temp && QUOTED_NULL (temp) && (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))) |
5803 | rflags |= W_HASQUOTEDNULL; | |
ccc6cda3 JA |
5804 | } |
5805 | #endif | |
5806 | else if (var = find_variable (name)) | |
5807 | { | |
7117c2d2 | 5808 | if (var_isset (var) && invisible_p (var) == 0) |
28ef6c31 | 5809 | { |
ccc6cda3 | 5810 | #if defined (ARRAY_VARS) |
3185942a JA |
5811 | if (assoc_p (var)) |
5812 | temp = assoc_reference (assoc_cell (var), "0"); | |
5813 | else if (array_p (var)) | |
5814 | temp = array_reference (array_cell (var), 0); | |
5815 | else | |
5816 | temp = value_cell (var); | |
ccc6cda3 JA |
5817 | #else |
5818 | temp = value_cell (var); | |
5819 | #endif | |
5820 | ||
5821 | if (temp) | |
b80f6443 JA |
5822 | temp = (*temp && (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))) |
5823 | ? quote_string (temp) | |
5824 | : quote_escapes (temp); | |
28ef6c31 | 5825 | } |
ccc6cda3 JA |
5826 | else |
5827 | temp = (char *)NULL; | |
5828 | } | |
ac50fbac CR |
5829 | else if (var = find_variable_last_nameref (name)) |
5830 | { | |
5831 | temp = nameref_cell (var); | |
5832 | #if defined (ARRAY_VARS) | |
5833 | /* Handle expanding nameref whose value is x[n] */ | |
5834 | if (temp && *temp && valid_array_reference (temp)) | |
5835 | { | |
5836 | name = temp; | |
5837 | goto expand_arrayref; | |
5838 | } | |
5839 | else | |
5840 | #endif | |
5841 | /* y=2 ; typeset -n x=y; echo ${x} is not the same as echo ${2} in ksh */ | |
5842 | if (temp && *temp && legal_identifier (temp) == 0) | |
5843 | { | |
5844 | last_command_exit_value = EXECUTION_FAILURE; | |
5845 | report_error (_("%s: invalid variable name for name reference"), temp); | |
5846 | temp = &expand_param_error; | |
5847 | } | |
5848 | else | |
5849 | temp = (char *)NULL; | |
5850 | } | |
726f6388 | 5851 | else |
ccc6cda3 | 5852 | temp = (char *)NULL; |
726f6388 | 5853 | |
95732b49 JA |
5854 | if (ret == 0) |
5855 | { | |
5856 | ret = alloc_word_desc (); | |
5857 | ret->word = temp; | |
f1be666c | 5858 | ret->flags |= rflags; |
95732b49 JA |
5859 | } |
5860 | return ret; | |
726f6388 JA |
5861 | } |
5862 | ||
ac50fbac CR |
5863 | static char * |
5864 | parameter_brace_find_indir (name, var_is_special, quoted, find_nameref) | |
ccc6cda3 | 5865 | char *name; |
ac50fbac | 5866 | int var_is_special, quoted, find_nameref; |
ccc6cda3 JA |
5867 | { |
5868 | char *temp, *t; | |
95732b49 | 5869 | WORD_DESC *w; |
ac50fbac CR |
5870 | SHELL_VAR *v; |
5871 | ||
5872 | if (find_nameref && var_is_special == 0 && (v = find_variable_last_nameref (name)) && | |
5873 | nameref_p (v) && (t = nameref_cell (v)) && *t) | |
5874 | return (savestring (t)); | |
ccc6cda3 | 5875 | |
ac50fbac CR |
5876 | /* If var_is_special == 0, and name is not an array reference, this does |
5877 | more expansion than necessary. It should really look up the variable's | |
5878 | value and not try to expand it. */ | |
495aee44 | 5879 | w = parameter_brace_expand_word (name, var_is_special, quoted, PF_IGNUNBOUND, 0); |
95732b49 | 5880 | t = w->word; |
b80f6443 JA |
5881 | /* Have to dequote here if necessary */ |
5882 | if (t) | |
5883 | { | |
5884 | temp = (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) | |
5885 | ? dequote_string (t) | |
5886 | : dequote_escapes (t); | |
5887 | free (t); | |
5888 | t = temp; | |
5889 | } | |
95732b49 JA |
5890 | dispose_word_desc (w); |
5891 | ||
ac50fbac CR |
5892 | return t; |
5893 | } | |
5894 | ||
5895 | /* Expand an indirect reference to a variable: ${!NAME} expands to the | |
5896 | value of the variable whose name is the value of NAME. */ | |
5897 | static WORD_DESC * | |
5898 | parameter_brace_expand_indir (name, var_is_special, quoted, quoted_dollar_atp, contains_dollar_at) | |
5899 | char *name; | |
5900 | int var_is_special, quoted; | |
5901 | int *quoted_dollar_atp, *contains_dollar_at; | |
5902 | { | |
5903 | char *temp, *t; | |
5904 | WORD_DESC *w; | |
5905 | SHELL_VAR *v; | |
5906 | ||
5907 | /* See if it's a nameref first, behave in ksh93-compatible fashion. | |
5908 | There is at least one incompatibility: given ${!foo[0]} where foo=bar, | |
5909 | bash performs an indirect lookup on foo[0] and expands the result; | |
5910 | ksh93 expands bar[0]. We could do that here -- there are enough usable | |
5911 | primitives to do that -- but do not at this point. */ | |
5912 | if (var_is_special == 0 && (v = find_variable_last_nameref (name))) | |
5913 | { | |
5914 | if (nameref_p (v) && (t = nameref_cell (v)) && *t) | |
5915 | { | |
5916 | w = alloc_word_desc (); | |
5917 | w->word = savestring (t); | |
5918 | w->flags = 0; | |
5919 | return w; | |
5920 | } | |
5921 | } | |
5922 | ||
5923 | t = parameter_brace_find_indir (name, var_is_special, quoted, 0); | |
5924 | ||
b80f6443 | 5925 | chk_atstar (t, quoted, quoted_dollar_atp, contains_dollar_at); |
ccc6cda3 | 5926 | if (t == 0) |
95732b49 JA |
5927 | return (WORD_DESC *)NULL; |
5928 | ||
495aee44 | 5929 | w = parameter_brace_expand_word (t, SPECIAL_VAR(t, 0), quoted, 0, 0); |
ccc6cda3 | 5930 | free (t); |
95732b49 JA |
5931 | |
5932 | return w; | |
ccc6cda3 JA |
5933 | } |
5934 | ||
726f6388 JA |
5935 | /* Expand the right side of a parameter expansion of the form ${NAMEcVALUE}, |
5936 | depending on the value of C, the separating character. C can be one of | |
ccc6cda3 JA |
5937 | "-", "+", or "=". QUOTED is true if the entire brace expression occurs |
5938 | between double quotes. */ | |
95732b49 | 5939 | static WORD_DESC * |
ccc6cda3 | 5940 | parameter_brace_expand_rhs (name, value, c, quoted, qdollaratp, hasdollarat) |
726f6388 | 5941 | char *name, *value; |
ccc6cda3 | 5942 | int c, quoted, *qdollaratp, *hasdollarat; |
726f6388 | 5943 | { |
95732b49 | 5944 | WORD_DESC *w; |
726f6388 JA |
5945 | WORD_LIST *l; |
5946 | char *t, *t1, *temp; | |
ccc6cda3 | 5947 | int hasdol; |
726f6388 | 5948 | |
ccc6cda3 JA |
5949 | /* If the entire expression is between double quotes, we want to treat |
5950 | the value as a double-quoted string, with the exception that we strip | |
3185942a | 5951 | embedded unescaped double quotes (for sh backwards compatibility). */ |
95732b49 | 5952 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && *value) |
726f6388 | 5953 | { |
ccc6cda3 | 5954 | hasdol = 0; |
95732b49 | 5955 | temp = string_extract_double_quoted (value, &hasdol, 1); |
726f6388 | 5956 | } |
95732b49 JA |
5957 | else |
5958 | temp = value; | |
ccc6cda3 | 5959 | |
95732b49 | 5960 | w = alloc_word_desc (); |
726f6388 | 5961 | hasdol = 0; |
ccc6cda3 JA |
5962 | /* XXX was 0 not quoted */ |
5963 | l = *temp ? expand_string_for_rhs (temp, quoted, &hasdol, (int *)NULL) | |
5964 | : (WORD_LIST *)0; | |
5965 | if (hasdollarat) | |
5966 | *hasdollarat = hasdol || (l && l->next); | |
95732b49 JA |
5967 | if (temp != value) |
5968 | free (temp); | |
726f6388 JA |
5969 | if (l) |
5970 | { | |
ccc6cda3 | 5971 | /* The expansion of TEMP returned something. We need to treat things |
b80f6443 JA |
5972 | slightly differently if HASDOL is non-zero. If we have "$@", the |
5973 | individual words have already been quoted. We need to turn them | |
5974 | into a string with the words separated by the first character of | |
5975 | $IFS without any additional quoting, so string_list_dollar_at won't | |
5976 | do the right thing. We use string_list_dollar_star instead. */ | |
5977 | temp = (hasdol || l->next) ? string_list_dollar_star (l) : string_list (l); | |
5978 | ||
ccc6cda3 JA |
5979 | /* If l->next is not null, we know that TEMP contained "$@", since that |
5980 | is the only expansion that creates more than one word. */ | |
b80f6443 | 5981 | if (qdollaratp && ((hasdol && quoted) || l->next)) |
ccc6cda3 | 5982 | *qdollaratp = 1; |
cd110fdf CR |
5983 | /* If we have a quoted null result (QUOTED_NULL(temp)) and the word is |
5984 | a quoted null (l->next == 0 && QUOTED_NULL(l->word->word)), the | |
5985 | flags indicate it (l->word->flags & W_HASQUOTEDNULL), and the | |
5986 | expansion is quoted (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) | |
5987 | (which is more paranoia than anything else), we need to return the | |
5988 | quoted null string and set the flags to indicate it. */ | |
ac50fbac | 5989 | if (l->next == 0 && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && QUOTED_NULL (temp) && QUOTED_NULL (l->word->word) && (l->word->flags & W_HASQUOTEDNULL)) |
cd110fdf CR |
5990 | { |
5991 | w->flags |= W_HASQUOTEDNULL; | |
5992 | } | |
726f6388 JA |
5993 | dispose_words (l); |
5994 | } | |
ccc6cda3 | 5995 | else if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && hasdol) |
726f6388 | 5996 | { |
ccc6cda3 JA |
5997 | /* The brace expansion occurred between double quotes and there was |
5998 | a $@ in TEMP. It does not matter if the $@ is quoted, as long as | |
7117c2d2 JA |
5999 | it does not expand to anything. In this case, we want to return |
6000 | a quoted empty string. */ | |
0628567a | 6001 | temp = make_quoted_char ('\0'); |
95732b49 | 6002 | w->flags |= W_HASQUOTEDNULL; |
726f6388 JA |
6003 | } |
6004 | else | |
6005 | temp = (char *)NULL; | |
6006 | ||
6007 | if (c == '-' || c == '+') | |
95732b49 JA |
6008 | { |
6009 | w->word = temp; | |
6010 | return w; | |
6011 | } | |
726f6388 JA |
6012 | |
6013 | /* c == '=' */ | |
ccc6cda3 | 6014 | t = temp ? savestring (temp) : savestring (""); |
726f6388 JA |
6015 | t1 = dequote_string (t); |
6016 | free (t); | |
b80f6443 JA |
6017 | #if defined (ARRAY_VARS) |
6018 | if (valid_array_reference (name)) | |
95732b49 | 6019 | assign_array_element (name, t1, 0); |
b80f6443 JA |
6020 | else |
6021 | #endif /* ARRAY_VARS */ | |
95732b49 | 6022 | bind_variable (name, t1, 0); |
ac50fbac CR |
6023 | #if 0 |
6024 | if (STREQ (name, "IFS") == 0) | |
6025 | #endif | |
6026 | stupidly_hack_special_variables (name); | |
95732b49 | 6027 | |
495aee44 CR |
6028 | /* From Posix group discussion Feb-March 2010. Issue 7 0000221 */ |
6029 | free (temp); | |
6030 | ||
6031 | w->word = t1; | |
95732b49 | 6032 | return w; |
726f6388 JA |
6033 | } |
6034 | ||
6035 | /* Deal with the right hand side of a ${name:?value} expansion in the case | |
6036 | that NAME is null or not set. If VALUE is non-null it is expanded and | |
6037 | used as the error message to print, otherwise a standard message is | |
6038 | printed. */ | |
6039 | static void | |
6040 | parameter_brace_expand_error (name, value) | |
6041 | char *name, *value; | |
6042 | { | |
ccc6cda3 JA |
6043 | WORD_LIST *l; |
6044 | char *temp; | |
6045 | ||
ac50fbac | 6046 | last_command_exit_value = EXECUTION_FAILURE; /* ensure it's non-zero */ |
726f6388 JA |
6047 | if (value && *value) |
6048 | { | |
95732b49 | 6049 | l = expand_string (value, 0); |
ccc6cda3 JA |
6050 | temp = string_list (l); |
6051 | report_error ("%s: %s", name, temp ? temp : ""); /* XXX was value not "" */ | |
6052 | FREE (temp); | |
726f6388 JA |
6053 | dispose_words (l); |
6054 | } | |
6055 | else | |
b80f6443 | 6056 | report_error (_("%s: parameter null or not set"), name); |
726f6388 JA |
6057 | |
6058 | /* Free the data we have allocated during this expansion, since we | |
6059 | are about to longjmp out. */ | |
6060 | free (name); | |
6061 | FREE (value); | |
6062 | } | |
6063 | ||
6064 | /* Return 1 if NAME is something for which parameter_brace_expand_length is | |
6065 | OK to do. */ | |
6066 | static int | |
6067 | valid_length_expression (name) | |
6068 | char *name; | |
6069 | { | |
28ef6c31 | 6070 | return (name[1] == '\0' || /* ${#} */ |
f73dda09 JA |
6071 | ((sh_syntaxtab[(unsigned char) name[1]] & CSPECVAR) && name[2] == '\0') || /* special param */ |
6072 | (DIGIT (name[1]) && all_digits (name + 1)) || /* ${#11} */ | |
ccc6cda3 JA |
6073 | #if defined (ARRAY_VARS) |
6074 | valid_array_reference (name + 1) || /* ${#a[7]} */ | |
6075 | #endif | |
726f6388 JA |
6076 | legal_identifier (name + 1)); /* ${#PS1} */ |
6077 | } | |
6078 | ||
6079 | /* Handle the parameter brace expansion that requires us to return the | |
6080 | length of a parameter. */ | |
7117c2d2 | 6081 | static intmax_t |
726f6388 JA |
6082 | parameter_brace_expand_length (name) |
6083 | char *name; | |
6084 | { | |
ccc6cda3 | 6085 | char *t, *newname; |
7117c2d2 | 6086 | intmax_t number, arg_index; |
ccc6cda3 JA |
6087 | WORD_LIST *list; |
6088 | #if defined (ARRAY_VARS) | |
6089 | SHELL_VAR *var; | |
6090 | #endif | |
6091 | ||
6092 | if (name[1] == '\0') /* ${#} */ | |
6093 | number = number_of_args (); | |
cce855bc JA |
6094 | else if ((name[1] == '@' || name[1] == '*') && name[2] == '\0') /* ${#@}, ${#*} */ |
6095 | number = number_of_args (); | |
f73dda09 | 6096 | else if ((sh_syntaxtab[(unsigned char) name[1]] & CSPECVAR) && name[2] == '\0') |
cce855bc JA |
6097 | { |
6098 | /* Take the lengths of some of the shell's special parameters. */ | |
6099 | switch (name[1]) | |
6100 | { | |
6101 | case '-': | |
6102 | t = which_set_flags (); | |
6103 | break; | |
6104 | case '?': | |
6105 | t = itos (last_command_exit_value); | |
6106 | break; | |
6107 | case '$': | |
6108 | t = itos (dollar_dollar_pid); | |
6109 | break; | |
6110 | case '!': | |
6111 | if (last_asynchronous_pid == NO_PID) | |
495aee44 | 6112 | t = (char *)NULL; /* XXX - error if set -u set? */ |
cce855bc | 6113 | else |
f73dda09 | 6114 | t = itos (last_asynchronous_pid); |
cce855bc JA |
6115 | break; |
6116 | case '#': | |
6117 | t = itos (number_of_args ()); | |
6118 | break; | |
6119 | } | |
6120 | number = STRLEN (t); | |
6121 | FREE (t); | |
6122 | } | |
ccc6cda3 JA |
6123 | #if defined (ARRAY_VARS) |
6124 | else if (valid_array_reference (name + 1)) | |
6125 | number = array_length_reference (name + 1); | |
6126 | #endif /* ARRAY_VARS */ | |
cce855bc | 6127 | else |
ccc6cda3 JA |
6128 | { |
6129 | number = 0; | |
6130 | ||
f73dda09 | 6131 | if (legal_number (name + 1, &arg_index)) /* ${#1} */ |
ccc6cda3 | 6132 | { |
f73dda09 | 6133 | t = get_dollar_var_value (arg_index); |
495aee44 CR |
6134 | if (t == 0 && unbound_vars_is_error) |
6135 | return INTMAX_MIN; | |
eb873671 | 6136 | number = MB_STRLEN (t); |
ccc6cda3 JA |
6137 | FREE (t); |
6138 | } | |
6139 | #if defined (ARRAY_VARS) | |
3185942a | 6140 | else if ((var = find_variable (name + 1)) && (invisible_p (var) == 0) && (array_p (var) || assoc_p (var))) |
ccc6cda3 | 6141 | { |
3185942a JA |
6142 | if (assoc_p (var)) |
6143 | t = assoc_reference (assoc_cell (var), "0"); | |
6144 | else | |
6145 | t = array_reference (array_cell (var), 0); | |
495aee44 CR |
6146 | if (t == 0 && unbound_vars_is_error) |
6147 | return INTMAX_MIN; | |
eb873671 | 6148 | number = MB_STRLEN (t); |
ccc6cda3 JA |
6149 | } |
6150 | #endif | |
6151 | else /* ${#PS1} */ | |
6152 | { | |
6153 | newname = savestring (name); | |
6154 | newname[0] = '$'; | |
6155 | list = expand_string (newname, Q_DOUBLE_QUOTES); | |
6156 | t = list ? string_list (list) : (char *)NULL; | |
6157 | free (newname); | |
6158 | if (list) | |
6159 | dispose_words (list); | |
6160 | ||
495aee44 | 6161 | number = t ? MB_STRLEN (t) : 0; |
ccc6cda3 JA |
6162 | FREE (t); |
6163 | } | |
6164 | } | |
ccc6cda3 JA |
6165 | |
6166 | return (number); | |
6167 | } | |
6168 | ||
28ef6c31 JA |
6169 | /* Skip characters in SUBSTR until DELIM. SUBSTR is an arithmetic expression, |
6170 | so we do some ad-hoc parsing of an arithmetic expression to find | |
6171 | the first DELIM, instead of using strchr(3). Two rules: | |
6172 | 1. If the substring contains a `(', read until closing `)'. | |
6173 | 2. If the substring contains a `?', read past one `:' for each `?'. | |
6174 | */ | |
6175 | ||
6176 | static char * | |
6177 | skiparith (substr, delim) | |
6178 | char *substr; | |
6179 | int delim; | |
6180 | { | |
7117c2d2 JA |
6181 | size_t sublen; |
6182 | int skipcol, pcount, i; | |
6183 | DECLARE_MBSTATE; | |
28ef6c31 | 6184 | |
7117c2d2 JA |
6185 | sublen = strlen (substr); |
6186 | i = skipcol = pcount = 0; | |
6187 | while (substr[i]) | |
28ef6c31 JA |
6188 | { |
6189 | /* Balance parens */ | |
7117c2d2 | 6190 | if (substr[i] == LPAREN) |
28ef6c31 JA |
6191 | { |
6192 | pcount++; | |
7117c2d2 | 6193 | i++; |
28ef6c31 JA |
6194 | continue; |
6195 | } | |
7117c2d2 | 6196 | if (substr[i] == RPAREN && pcount) |
28ef6c31 JA |
6197 | { |
6198 | pcount--; | |
7117c2d2 | 6199 | i++; |
28ef6c31 JA |
6200 | continue; |
6201 | } | |
6202 | if (pcount) | |
7117c2d2 JA |
6203 | { |
6204 | ADVANCE_CHAR (substr, sublen, i); | |
6205 | continue; | |
6206 | } | |
28ef6c31 JA |
6207 | |
6208 | /* Skip one `:' for each `?' */ | |
7117c2d2 | 6209 | if (substr[i] == ':' && skipcol) |
28ef6c31 JA |
6210 | { |
6211 | skipcol--; | |
7117c2d2 | 6212 | i++; |
28ef6c31 JA |
6213 | continue; |
6214 | } | |
7117c2d2 | 6215 | if (substr[i] == delim) |
28ef6c31 | 6216 | break; |
7117c2d2 | 6217 | if (substr[i] == '?') |
28ef6c31 JA |
6218 | { |
6219 | skipcol++; | |
7117c2d2 | 6220 | i++; |
28ef6c31 JA |
6221 | continue; |
6222 | } | |
7117c2d2 | 6223 | ADVANCE_CHAR (substr, sublen, i); |
28ef6c31 | 6224 | } |
7117c2d2 JA |
6225 | |
6226 | return (substr + i); | |
28ef6c31 JA |
6227 | } |
6228 | ||
ccc6cda3 JA |
6229 | /* Verify and limit the start and end of the desired substring. If |
6230 | VTYPE == 0, a regular shell variable is being used; if it is 1, | |
cce855bc | 6231 | then the positional parameters are being used; if it is 2, then |
e8ce775d JA |
6232 | VALUE is really a pointer to an array variable that should be used. |
6233 | Return value is 1 if both values were OK, 0 if there was a problem | |
6234 | with an invalid expression, or -1 if the values were out of range. */ | |
ccc6cda3 | 6235 | static int |
3185942a JA |
6236 | verify_substring_values (v, value, substr, vtype, e1p, e2p) |
6237 | SHELL_VAR *v; | |
ccc6cda3 | 6238 | char *value, *substr; |
f73dda09 | 6239 | int vtype; |
7117c2d2 | 6240 | intmax_t *e1p, *e2p; |
ccc6cda3 | 6241 | { |
bb70624e | 6242 | char *t, *temp1, *temp2; |
f73dda09 JA |
6243 | arrayind_t len; |
6244 | int expok; | |
ccc6cda3 JA |
6245 | #if defined (ARRAY_VARS) |
6246 | ARRAY *a; | |
3185942a | 6247 | HASH_TABLE *h; |
ccc6cda3 JA |
6248 | #endif |
6249 | ||
28ef6c31 JA |
6250 | /* duplicate behavior of strchr(3) */ |
6251 | t = skiparith (substr, ':'); | |
6252 | if (*t && *t == ':') | |
7117c2d2 | 6253 | *t = '\0'; |
28ef6c31 JA |
6254 | else |
6255 | t = (char *)0; | |
f73dda09 | 6256 | |
0628567a | 6257 | temp1 = expand_arith_string (substr, Q_DOUBLE_QUOTES); |
d166f048 | 6258 | *e1p = evalexp (temp1, &expok); |
ccc6cda3 | 6259 | free (temp1); |
d166f048 JA |
6260 | if (expok == 0) |
6261 | return (0); | |
ccc6cda3 | 6262 | |
f73dda09 | 6263 | len = -1; /* paranoia */ |
ccc6cda3 JA |
6264 | switch (vtype) |
6265 | { | |
6266 | case VT_VARIABLE: | |
d166f048 | 6267 | case VT_ARRAYMEMBER: |
eb873671 | 6268 | len = MB_STRLEN (value); |
ccc6cda3 JA |
6269 | break; |
6270 | case VT_POSPARMS: | |
6271 | len = number_of_args () + 1; | |
3185942a JA |
6272 | if (*e1p == 0) |
6273 | len++; /* add one arg if counting from $0 */ | |
ccc6cda3 JA |
6274 | break; |
6275 | #if defined (ARRAY_VARS) | |
6276 | case VT_ARRAYVAR: | |
eb873671 | 6277 | /* For arrays, the first value deals with array indices. Negative |
3185942a JA |
6278 | offsets count from one past the array's maximum index. Associative |
6279 | arrays treat the number of elements as the maximum index. */ | |
6280 | if (assoc_p (v)) | |
6281 | { | |
6282 | h = assoc_cell (v); | |
6283 | len = assoc_num_elements (h) + (*e1p < 0); | |
6284 | } | |
6285 | else | |
6286 | { | |
6287 | a = (ARRAY *)value; | |
6288 | len = array_max_index (a) + (*e1p < 0); /* arrays index from 0 to n - 1 */ | |
6289 | } | |
ccc6cda3 JA |
6290 | break; |
6291 | #endif | |
6292 | } | |
6293 | ||
f73dda09 JA |
6294 | if (len == -1) /* paranoia */ |
6295 | return -1; | |
6296 | ||
ccc6cda3 JA |
6297 | if (*e1p < 0) /* negative offsets count from end */ |
6298 | *e1p += len; | |
6299 | ||
eb873671 | 6300 | if (*e1p > len || *e1p < 0) |
e8ce775d | 6301 | return (-1); |
d166f048 | 6302 | |
b80f6443 JA |
6303 | #if defined (ARRAY_VARS) |
6304 | /* For arrays, the second offset deals with the number of elements. */ | |
6305 | if (vtype == VT_ARRAYVAR) | |
3185942a | 6306 | len = assoc_p (v) ? assoc_num_elements (h) : array_num_elements (a); |
b80f6443 JA |
6307 | #endif |
6308 | ||
ccc6cda3 JA |
6309 | if (t) |
6310 | { | |
6311 | t++; | |
bb70624e | 6312 | temp2 = savestring (t); |
0628567a | 6313 | temp1 = expand_arith_string (temp2, Q_DOUBLE_QUOTES); |
bb70624e | 6314 | free (temp2); |
ccc6cda3 | 6315 | t[-1] = ':'; |
d166f048 | 6316 | *e2p = evalexp (temp1, &expok); |
ccc6cda3 | 6317 | free (temp1); |
d166f048 | 6318 | if (expok == 0) |
28ef6c31 | 6319 | return (0); |
ac50fbac | 6320 | #if 1 |
495aee44 | 6321 | if ((vtype == VT_ARRAYVAR || vtype == VT_POSPARMS) && *e2p < 0) |
ac50fbac CR |
6322 | #else |
6323 | /* bash-4.3: allow positional parameter length < 0 to count backwards | |
6324 | from end of positional parameters */ | |
6325 | if (vtype == VT_ARRAYVAR && *e2p < 0) | |
6326 | #endif | |
28ef6c31 | 6327 | { |
b80f6443 | 6328 | internal_error (_("%s: substring expression < 0"), t); |
ccc6cda3 | 6329 | return (0); |
28ef6c31 | 6330 | } |
b80f6443 JA |
6331 | #if defined (ARRAY_VARS) |
6332 | /* In order to deal with sparse arrays, push the intelligence about how | |
6333 | to deal with the number of elements desired down to the array- | |
6334 | specific functions. */ | |
6335 | if (vtype != VT_ARRAYVAR) | |
6336 | #endif | |
6337 | { | |
495aee44 CR |
6338 | if (*e2p < 0) |
6339 | { | |
6340 | *e2p += len; | |
6341 | if (*e2p < 0 || *e2p < *e1p) | |
6342 | { | |
6343 | internal_error (_("%s: substring expression < 0"), t); | |
6344 | return (0); | |
6345 | } | |
6346 | } | |
6347 | else | |
6348 | *e2p += *e1p; /* want E2 chars starting at E1 */ | |
b80f6443 JA |
6349 | if (*e2p > len) |
6350 | *e2p = len; | |
6351 | } | |
ccc6cda3 JA |
6352 | } |
6353 | else | |
6354 | *e2p = len; | |
6355 | ||
6356 | return (1); | |
6357 | } | |
6358 | ||
ccc6cda3 | 6359 | /* Return the type of variable specified by VARNAME (simple variable, |
cce855bc | 6360 | positional param, or array variable). Also return the value specified |
7117c2d2 | 6361 | by VARNAME (value of a variable or a reference to an array element). |
495aee44 CR |
6362 | QUOTED is the standard description of quoting state, using Q_* defines. |
6363 | FLAGS is currently a set of flags to pass to array_value. If IND is | |
6364 | non-null and not INTMAX_MIN, and FLAGS includes AV_USEIND, IND is | |
6365 | passed to array_value so the array index is not computed again. | |
7117c2d2 JA |
6366 | If this returns VT_VARIABLE, the caller assumes that CTLESC and CTLNUL |
6367 | characters in the value are quoted with CTLESC and takes appropriate | |
6368 | steps. For convenience, *VALP is set to the dequoted VALUE. */ | |
ccc6cda3 | 6369 | static int |
495aee44 | 6370 | get_var_and_type (varname, value, ind, quoted, flags, varp, valp) |
ccc6cda3 | 6371 | char *varname, *value; |
495aee44 CR |
6372 | arrayind_t ind; |
6373 | int quoted, flags; | |
ccc6cda3 JA |
6374 | SHELL_VAR **varp; |
6375 | char **valp; | |
6376 | { | |
ac50fbac CR |
6377 | int vtype, want_indir; |
6378 | char *temp, *vname; | |
6379 | WORD_DESC *wd; | |
ccc6cda3 JA |
6380 | #if defined (ARRAY_VARS) |
6381 | SHELL_VAR *v; | |
6382 | #endif | |
495aee44 | 6383 | arrayind_t lind; |
ccc6cda3 | 6384 | |
ac50fbac CR |
6385 | want_indir = *varname == '!' && |
6386 | (legal_variable_starter ((unsigned char)varname[1]) || DIGIT (varname[1]) | |
6387 | || VALID_INDIR_PARAM (varname[1])); | |
6388 | if (want_indir) | |
6389 | vname = parameter_brace_find_indir (varname+1, SPECIAL_VAR (varname, 1), quoted, 1); | |
6390 | else | |
6391 | vname = varname; | |
6392 | ||
7117c2d2 | 6393 | /* This sets vtype to VT_VARIABLE or VT_POSPARMS */ |
ac50fbac CR |
6394 | vtype = (vname[0] == '@' || vname[0] == '*') && vname[1] == '\0'; |
6395 | if (vtype == VT_POSPARMS && vname[0] == '*') | |
b80f6443 | 6396 | vtype |= VT_STARSUB; |
ccc6cda3 JA |
6397 | *varp = (SHELL_VAR *)NULL; |
6398 | ||
6399 | #if defined (ARRAY_VARS) | |
ac50fbac | 6400 | if (valid_array_reference (vname)) |
ccc6cda3 | 6401 | { |
ac50fbac | 6402 | v = array_variable_part (vname, &temp, (int *)0); |
495aee44 CR |
6403 | /* If we want to signal array_value to use an already-computed index, |
6404 | set LIND to that index */ | |
6405 | lind = (ind != INTMAX_MIN && (flags & AV_USEIND)) ? ind : 0; | |
ac50fbac CR |
6406 | if (v && invisible_p (v)) |
6407 | { | |
6408 | vtype = VT_ARRAYMEMBER; | |
6409 | *varp = (SHELL_VAR *)NULL; | |
6410 | *valp = (char *)NULL; | |
6411 | } | |
3185942a | 6412 | if (v && (array_p (v) || assoc_p (v))) |
f73dda09 JA |
6413 | { /* [ */ |
6414 | if (ALL_ELEMENT_SUB (temp[0]) && temp[1] == ']') | |
ccc6cda3 | 6415 | { |
ac50fbac | 6416 | /* Callers have to differentiate between indexed and associative */ |
ccc6cda3 | 6417 | vtype = VT_ARRAYVAR; |
b80f6443 JA |
6418 | if (temp[0] == '*') |
6419 | vtype |= VT_STARSUB; | |
3185942a | 6420 | *valp = array_p (v) ? (char *)array_cell (v) : (char *)assoc_cell (v); |
ccc6cda3 JA |
6421 | } |
6422 | else | |
6423 | { | |
d166f048 | 6424 | vtype = VT_ARRAYMEMBER; |
ac50fbac | 6425 | *valp = array_value (vname, Q_DOUBLE_QUOTES, flags, (int *)NULL, &lind); |
ccc6cda3 JA |
6426 | } |
6427 | *varp = v; | |
6428 | } | |
95732b49 JA |
6429 | else if (v && (ALL_ELEMENT_SUB (temp[0]) && temp[1] == ']')) |
6430 | { | |
6431 | vtype = VT_VARIABLE; | |
6432 | *varp = v; | |
6433 | if (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) | |
6434 | *valp = dequote_string (value); | |
6435 | else | |
6436 | *valp = dequote_escapes (value); | |
6437 | } | |
ccc6cda3 | 6438 | else |
3185942a JA |
6439 | { |
6440 | vtype = VT_ARRAYMEMBER; | |
6441 | *varp = v; | |
ac50fbac | 6442 | *valp = array_value (vname, Q_DOUBLE_QUOTES, flags, (int *)NULL, &lind); |
3185942a | 6443 | } |
ccc6cda3 | 6444 | } |
ac50fbac | 6445 | else if ((v = find_variable (vname)) && (invisible_p (v) == 0) && (assoc_p (v) || array_p (v))) |
ccc6cda3 | 6446 | { |
7117c2d2 | 6447 | vtype = VT_ARRAYMEMBER; |
ccc6cda3 | 6448 | *varp = v; |
3185942a | 6449 | *valp = assoc_p (v) ? assoc_reference (assoc_cell (v), "0") : array_reference (array_cell (v), 0); |
ccc6cda3 JA |
6450 | } |
6451 | else | |
6452 | #endif | |
b80f6443 JA |
6453 | { |
6454 | if (value && vtype == VT_VARIABLE) | |
6455 | { | |
6456 | if (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) | |
6457 | *valp = dequote_string (value); | |
6458 | else | |
6459 | *valp = dequote_escapes (value); | |
6460 | } | |
6461 | else | |
6462 | *valp = value; | |
6463 | } | |
ccc6cda3 | 6464 | |
ac50fbac CR |
6465 | if (want_indir) |
6466 | free (vname); | |
6467 | ||
ccc6cda3 JA |
6468 | return vtype; |
6469 | } | |
6470 | ||
cce855bc JA |
6471 | /******************************************************/ |
6472 | /* */ | |
6473 | /* Functions to extract substrings of variable values */ | |
6474 | /* */ | |
6475 | /******************************************************/ | |
6476 | ||
b80f6443 JA |
6477 | #if defined (HANDLE_MULTIBYTE) |
6478 | /* Character-oriented rather than strictly byte-oriented substrings. S and | |
6479 | E, rather being strict indices into STRING, indicate character (possibly | |
6480 | multibyte character) positions that require calculation. | |
6481 | Used by the ${param:offset[:length]} expansion. */ | |
6482 | static char * | |
6483 | mb_substring (string, s, e) | |
6484 | char *string; | |
6485 | int s, e; | |
6486 | { | |
6487 | char *tt; | |
6488 | int start, stop, i, slen; | |
6489 | DECLARE_MBSTATE; | |
6490 | ||
6491 | start = 0; | |
95732b49 JA |
6492 | /* Don't need string length in ADVANCE_CHAR unless multibyte chars possible. */ |
6493 | slen = (MB_CUR_MAX > 1) ? STRLEN (string) : 0; | |
b80f6443 JA |
6494 | |
6495 | i = s; | |
6496 | while (string[start] && i--) | |
6497 | ADVANCE_CHAR (string, slen, start); | |
6498 | stop = start; | |
6499 | i = e - s; | |
6500 | while (string[stop] && i--) | |
6501 | ADVANCE_CHAR (string, slen, stop); | |
6502 | tt = substring (string, start, stop); | |
6503 | return tt; | |
6504 | } | |
6505 | #endif | |
6506 | ||
ccc6cda3 JA |
6507 | /* Process a variable substring expansion: ${name:e1[:e2]}. If VARNAME |
6508 | is `@', use the positional parameters; otherwise, use the value of | |
6509 | VARNAME. If VARNAME is an array variable, use the array elements. */ | |
6510 | ||
6511 | static char * | |
495aee44 CR |
6512 | parameter_brace_substring (varname, value, ind, substr, quoted, flags) |
6513 | char *varname, *value; | |
6514 | int ind; | |
6515 | char *substr; | |
6516 | int quoted, flags; | |
ccc6cda3 | 6517 | { |
7117c2d2 | 6518 | intmax_t e1, e2; |
b80f6443 | 6519 | int vtype, r, starsub; |
0628567a | 6520 | char *temp, *val, *tt, *oname; |
ccc6cda3 JA |
6521 | SHELL_VAR *v; |
6522 | ||
6523 | if (value == 0) | |
6524 | return ((char *)NULL); | |
6525 | ||
0628567a | 6526 | oname = this_command_name; |
ccc6cda3 JA |
6527 | this_command_name = varname; |
6528 | ||
495aee44 | 6529 | vtype = get_var_and_type (varname, value, ind, quoted, flags, &v, &val); |
ccc6cda3 | 6530 | if (vtype == -1) |
0628567a JA |
6531 | { |
6532 | this_command_name = oname; | |
6533 | return ((char *)NULL); | |
6534 | } | |
ccc6cda3 | 6535 | |
b80f6443 JA |
6536 | starsub = vtype & VT_STARSUB; |
6537 | vtype &= ~VT_STARSUB; | |
6538 | ||
3185942a | 6539 | r = verify_substring_values (v, val, substr, vtype, &e1, &e2); |
0628567a | 6540 | this_command_name = oname; |
e8ce775d | 6541 | if (r <= 0) |
ac50fbac CR |
6542 | { |
6543 | if (vtype == VT_VARIABLE) | |
6544 | FREE (val); | |
6545 | return ((r == 0) ? &expand_param_error : (char *)NULL); | |
6546 | } | |
ccc6cda3 JA |
6547 | |
6548 | switch (vtype) | |
6549 | { | |
6550 | case VT_VARIABLE: | |
d166f048 | 6551 | case VT_ARRAYMEMBER: |
b80f6443 JA |
6552 | #if defined (HANDLE_MULTIBYTE) |
6553 | if (MB_CUR_MAX > 1) | |
6554 | tt = mb_substring (val, e1, e2); | |
6555 | else | |
6556 | #endif | |
7117c2d2 | 6557 | tt = substring (val, e1, e2); |
b80f6443 | 6558 | |
7117c2d2 JA |
6559 | if (vtype == VT_VARIABLE) |
6560 | FREE (val); | |
6561 | if (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) | |
6562 | temp = quote_string (tt); | |
6563 | else | |
6564 | temp = tt ? quote_escapes (tt) : (char *)NULL; | |
6565 | FREE (tt); | |
ccc6cda3 JA |
6566 | break; |
6567 | case VT_POSPARMS: | |
7117c2d2 JA |
6568 | tt = pos_params (varname, e1, e2, quoted); |
6569 | if ((quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) == 0) | |
6570 | { | |
6571 | temp = tt ? quote_escapes (tt) : (char *)NULL; | |
6572 | FREE (tt); | |
6573 | } | |
6574 | else | |
6575 | temp = tt; | |
ccc6cda3 JA |
6576 | break; |
6577 | #if defined (ARRAY_VARS) | |
6578 | case VT_ARRAYVAR: | |
3185942a JA |
6579 | if (assoc_p (v)) |
6580 | /* we convert to list and take first e2 elements starting at e1th | |
6581 | element -- officially undefined for now */ | |
6582 | temp = assoc_subrange (assoc_cell (v), e1, e2, starsub, quoted); | |
6583 | else | |
b80f6443 JA |
6584 | /* We want E2 to be the number of elements desired (arrays can be sparse, |
6585 | so verify_substring_values just returns the numbers specified and we | |
6586 | rely on array_subrange to understand how to deal with them). */ | |
3185942a | 6587 | temp = array_subrange (array_cell (v), e1, e2, starsub, quoted); |
f1be666c JA |
6588 | /* array_subrange now calls array_quote_escapes as appropriate, so the |
6589 | caller no longer needs to. */ | |
ccc6cda3 JA |
6590 | break; |
6591 | #endif | |
f73dda09 JA |
6592 | default: |
6593 | temp = (char *)NULL; | |
ccc6cda3 JA |
6594 | } |
6595 | ||
6596 | return temp; | |
6597 | } | |
6598 | ||
cce855bc JA |
6599 | /****************************************************************/ |
6600 | /* */ | |
6601 | /* Functions to perform pattern substitution on variable values */ | |
6602 | /* */ | |
6603 | /****************************************************************/ | |
6604 | ||
495aee44 CR |
6605 | static int |
6606 | shouldexp_replacement (s) | |
6607 | char *s; | |
6608 | { | |
6609 | register char *p; | |
6610 | ||
6611 | for (p = s; p && *p; p++) | |
6612 | { | |
6613 | if (*p == '\\') | |
6614 | p++; | |
6615 | else if (*p == '&') | |
6616 | return 1; | |
6617 | } | |
6618 | return 0; | |
6619 | } | |
6620 | ||
ccc6cda3 JA |
6621 | char * |
6622 | pat_subst (string, pat, rep, mflags) | |
6623 | char *string, *pat, *rep; | |
6624 | int mflags; | |
6625 | { | |
495aee44 CR |
6626 | char *ret, *s, *e, *str, *rstr, *mstr; |
6627 | int rsize, rptr, l, replen, mtype, rxpand, rslen, mlen; | |
6628 | ||
6629 | if (string == 0) | |
6630 | return (savestring ("")); | |
ccc6cda3 | 6631 | |
b72432fd JA |
6632 | mtype = mflags & MATCH_TYPEMASK; |
6633 | ||
495aee44 CR |
6634 | #if 0 /* bash-4.2 ? */ |
6635 | rxpand = (rep && *rep) ? shouldexp_replacement (rep) : 0; | |
6636 | #else | |
6637 | rxpand = 0; | |
6638 | #endif | |
6639 | ||
b72432fd JA |
6640 | /* Special cases: |
6641 | * 1. A null pattern with mtype == MATCH_BEG means to prefix STRING | |
6642 | * with REP and return the result. | |
6643 | * 2. A null pattern with mtype == MATCH_END means to append REP to | |
6644 | * STRING and return the result. | |
495aee44 | 6645 | * These don't understand or process `&' in the replacement string. |
b72432fd JA |
6646 | */ |
6647 | if ((pat == 0 || *pat == 0) && (mtype == MATCH_BEG || mtype == MATCH_END)) | |
6648 | { | |
6649 | replen = STRLEN (rep); | |
495aee44 | 6650 | l = STRLEN (string); |
f73dda09 | 6651 | ret = (char *)xmalloc (replen + l + 2); |
bb70624e JA |
6652 | if (replen == 0) |
6653 | strcpy (ret, string); | |
6654 | else if (mtype == MATCH_BEG) | |
b72432fd JA |
6655 | { |
6656 | strcpy (ret, rep); | |
6657 | strcpy (ret + replen, string); | |
6658 | } | |
6659 | else | |
6660 | { | |
6661 | strcpy (ret, string); | |
6662 | strcpy (ret + l, rep); | |
6663 | } | |
6664 | return (ret); | |
6665 | } | |
6666 | ||
f73dda09 | 6667 | ret = (char *)xmalloc (rsize = 64); |
ccc6cda3 JA |
6668 | ret[0] = '\0'; |
6669 | ||
ccc6cda3 JA |
6670 | for (replen = STRLEN (rep), rptr = 0, str = string;;) |
6671 | { | |
6672 | if (match_pattern (str, pat, mtype, &s, &e) == 0) | |
6673 | break; | |
6674 | l = s - str; | |
495aee44 CR |
6675 | |
6676 | if (rxpand) | |
6677 | { | |
6678 | int x; | |
6679 | mlen = e - s; | |
6680 | mstr = xmalloc (mlen + 1); | |
6681 | for (x = 0; x < mlen; x++) | |
6682 | mstr[x] = s[x]; | |
6683 | mstr[mlen] = '\0'; | |
6684 | rstr = strcreplace (rep, '&', mstr, 0); | |
6685 | rslen = strlen (rstr); | |
6686 | } | |
6687 | else | |
6688 | { | |
6689 | rstr = rep; | |
6690 | rslen = replen; | |
6691 | } | |
6692 | ||
6693 | RESIZE_MALLOCED_BUFFER (ret, rptr, (l + rslen), rsize, 64); | |
ccc6cda3 JA |
6694 | |
6695 | /* OK, now copy the leading unmatched portion of the string (from | |
6696 | str to s) to ret starting at rptr (the current offset). Then copy | |
28ef6c31 JA |
6697 | the replacement string at ret + rptr + (s - str). Increment |
6698 | rptr (if necessary) and str and go on. */ | |
ccc6cda3 JA |
6699 | if (l) |
6700 | { | |
6701 | strncpy (ret + rptr, str, l); | |
6702 | rptr += l; | |
6703 | } | |
6704 | if (replen) | |
6705 | { | |
495aee44 CR |
6706 | strncpy (ret + rptr, rstr, rslen); |
6707 | rptr += rslen; | |
ccc6cda3 JA |
6708 | } |
6709 | str = e; /* e == end of match */ | |
b80f6443 | 6710 | |
495aee44 CR |
6711 | if (rstr != rep) |
6712 | free (rstr); | |
6713 | ||
ccc6cda3 | 6714 | if (((mflags & MATCH_GLOBREP) == 0) || mtype != MATCH_ANY) |
28ef6c31 | 6715 | break; |
b80f6443 JA |
6716 | |
6717 | if (s == e) | |
0001803f CR |
6718 | { |
6719 | /* On a zero-length match, make sure we copy one character, since | |
6720 | we increment one character to avoid infinite recursion. */ | |
6721 | RESIZE_MALLOCED_BUFFER (ret, rptr, 1, rsize, 64); | |
6722 | ret[rptr++] = *str++; | |
6723 | e++; /* avoid infinite recursion on zero-length match */ | |
6724 | } | |
ccc6cda3 JA |
6725 | } |
6726 | ||
6727 | /* Now copy the unmatched portion of the input string */ | |
495aee44 | 6728 | if (str && *str) |
d166f048 JA |
6729 | { |
6730 | RESIZE_MALLOCED_BUFFER (ret, rptr, STRLEN(str) + 1, rsize, 64); | |
6731 | strcpy (ret + rptr, str); | |
6732 | } | |
ccc6cda3 JA |
6733 | else |
6734 | ret[rptr] = '\0'; | |
6735 | ||
6736 | return ret; | |
6737 | } | |
6738 | ||
6739 | /* Do pattern match and replacement on the positional parameters. */ | |
6740 | static char * | |
6741 | pos_params_pat_subst (string, pat, rep, mflags) | |
6742 | char *string, *pat, *rep; | |
6743 | int mflags; | |
6744 | { | |
6745 | WORD_LIST *save, *params; | |
6746 | WORD_DESC *w; | |
0628567a | 6747 | char *ret; |
3185942a | 6748 | int pchar, qflags; |
ccc6cda3 JA |
6749 | |
6750 | save = params = list_rest_of_args (); | |
6751 | if (save == 0) | |
6752 | return ((char *)NULL); | |
6753 | ||
6754 | for ( ; params; params = params->next) | |
6755 | { | |
6756 | ret = pat_subst (params->word->word, pat, rep, mflags); | |
95732b49 JA |
6757 | w = alloc_word_desc (); |
6758 | w->word = ret ? ret : savestring (""); | |
ccc6cda3 JA |
6759 | dispose_word (params->word); |
6760 | params->word = w; | |
ccc6cda3 JA |
6761 | } |
6762 | ||
3185942a JA |
6763 | pchar = (mflags & MATCH_STARSUB) == MATCH_STARSUB ? '*' : '@'; |
6764 | qflags = (mflags & MATCH_QUOTED) == MATCH_QUOTED ? Q_DOUBLE_QUOTES : 0; | |
6765 | ||
3185942a | 6766 | ret = string_list_pos_params (pchar, save, qflags); |
3185942a | 6767 | |
ccc6cda3 JA |
6768 | dispose_words (save); |
6769 | ||
6770 | return (ret); | |
6771 | } | |
6772 | ||
cce855bc JA |
6773 | /* Perform pattern substitution on VALUE, which is the expansion of |
6774 | VARNAME. PATSUB is an expression supplying the pattern to match | |
6775 | and the string to substitute. QUOTED is a flags word containing | |
6776 | the type of quoting currently in effect. */ | |
ccc6cda3 | 6777 | static char * |
495aee44 CR |
6778 | parameter_brace_patsub (varname, value, ind, patsub, quoted, flags) |
6779 | char *varname, *value; | |
6780 | int ind; | |
6781 | char *patsub; | |
6782 | int quoted, flags; | |
ccc6cda3 | 6783 | { |
3185942a | 6784 | int vtype, mflags, starsub, delim; |
7117c2d2 | 6785 | char *val, *temp, *pat, *rep, *p, *lpatsub, *tt; |
ccc6cda3 JA |
6786 | SHELL_VAR *v; |
6787 | ||
6788 | if (value == 0) | |
6789 | return ((char *)NULL); | |
6790 | ||
6791 | this_command_name = varname; | |
6792 | ||
495aee44 | 6793 | vtype = get_var_and_type (varname, value, ind, quoted, flags, &v, &val); |
ccc6cda3 JA |
6794 | if (vtype == -1) |
6795 | return ((char *)NULL); | |
6796 | ||
b80f6443 JA |
6797 | starsub = vtype & VT_STARSUB; |
6798 | vtype &= ~VT_STARSUB; | |
6799 | ||
ccc6cda3 | 6800 | mflags = 0; |
ac50fbac CR |
6801 | /* PATSUB is never NULL when this is called. */ |
6802 | if (*patsub == '/') | |
f1be666c JA |
6803 | { |
6804 | mflags |= MATCH_GLOBREP; | |
6805 | patsub++; | |
6806 | } | |
7117c2d2 JA |
6807 | |
6808 | /* Malloc this because expand_string_if_necessary or one of the expansion | |
6809 | functions in its call chain may free it on a substitution error. */ | |
bb70624e | 6810 | lpatsub = savestring (patsub); |
ccc6cda3 JA |
6811 | |
6812 | if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) | |
6813 | mflags |= MATCH_QUOTED; | |
6814 | ||
b80f6443 JA |
6815 | if (starsub) |
6816 | mflags |= MATCH_STARSUB; | |
6817 | ||
0628567a JA |
6818 | /* If the pattern starts with a `/', make sure we skip over it when looking |
6819 | for the replacement delimiter. */ | |
3185942a JA |
6820 | delim = skip_to_delim (lpatsub, ((*patsub == '/') ? 1 : 0), "/", 0); |
6821 | if (lpatsub[delim] == '/') | |
6822 | { | |
6823 | lpatsub[delim] = 0; | |
6824 | rep = lpatsub + delim + 1; | |
6825 | } | |
6826 | else | |
6827 | rep = (char *)NULL; | |
ccc6cda3 JA |
6828 | |
6829 | if (rep && *rep == '\0') | |
6830 | rep = (char *)NULL; | |
6831 | ||
b80f6443 JA |
6832 | /* Perform the same expansions on the pattern as performed by the |
6833 | pattern removal expansions. */ | |
6834 | pat = getpattern (lpatsub, quoted, 1); | |
bb70624e | 6835 | |
ccc6cda3 | 6836 | if (rep) |
d166f048 | 6837 | { |
ac50fbac CR |
6838 | /* We want to perform quote removal on the expanded replacement even if |
6839 | the entire expansion is double-quoted because the parser and string | |
6840 | extraction functions treated quotes in the replacement string as | |
6841 | special. THIS IS NOT BACKWARDS COMPATIBLE WITH BASH-4.2. */ | |
6842 | if (shell_compatibility_level > 42) | |
6843 | rep = expand_string_if_necessary (rep, quoted & ~(Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT), expand_string_unsplit); | |
6844 | /* This is the bash-4.2 code. */ | |
6845 | else if ((mflags & MATCH_QUOTED) == 0) | |
f73dda09 | 6846 | rep = expand_string_if_necessary (rep, quoted, expand_string_unsplit); |
d166f048 | 6847 | else |
f73dda09 | 6848 | rep = expand_string_to_string_internal (rep, quoted, expand_string_unsplit); |
d166f048 | 6849 | } |
ccc6cda3 | 6850 | |
0628567a | 6851 | /* ksh93 doesn't allow the match specifier to be a part of the expanded |
f1be666c JA |
6852 | pattern. This is an extension. Make sure we don't anchor the pattern |
6853 | at the beginning or end of the string if we're doing global replacement, | |
6854 | though. */ | |
ccc6cda3 | 6855 | p = pat; |
f1be666c JA |
6856 | if (mflags & MATCH_GLOBREP) |
6857 | mflags |= MATCH_ANY; | |
0628567a | 6858 | else if (pat && pat[0] == '#') |
ccc6cda3 JA |
6859 | { |
6860 | mflags |= MATCH_BEG; | |
6861 | p++; | |
6862 | } | |
d166f048 | 6863 | else if (pat && pat[0] == '%') |
ccc6cda3 JA |
6864 | { |
6865 | mflags |= MATCH_END; | |
6866 | p++; | |
6867 | } | |
6868 | else | |
6869 | mflags |= MATCH_ANY; | |
6870 | ||
cce855bc JA |
6871 | /* OK, we now want to substitute REP for PAT in VAL. If |
6872 | flags & MATCH_GLOBREP is non-zero, the substitution is done | |
6873 | everywhere, otherwise only the first occurrence of PAT is | |
7117c2d2 JA |
6874 | replaced. The pattern matching code doesn't understand |
6875 | CTLESC quoting CTLESC and CTLNUL so we use the dequoted variable | |
6876 | values passed in (VT_VARIABLE) so the pattern substitution | |
6877 | code works right. We need to requote special chars after | |
6878 | we're done for VT_VARIABLE and VT_ARRAYMEMBER, and for the | |
6879 | other cases if QUOTED == 0, since the posparams and arrays | |
6880 | indexed by * or @ do special things when QUOTED != 0. */ | |
6881 | ||
ccc6cda3 JA |
6882 | switch (vtype) |
6883 | { | |
6884 | case VT_VARIABLE: | |
d166f048 | 6885 | case VT_ARRAYMEMBER: |
ccc6cda3 | 6886 | temp = pat_subst (val, p, rep, mflags); |
7117c2d2 JA |
6887 | if (vtype == VT_VARIABLE) |
6888 | FREE (val); | |
6889 | if (temp) | |
6890 | { | |
3185942a | 6891 | tt = (mflags & MATCH_QUOTED) ? quote_string (temp) : quote_escapes (temp); |
7117c2d2 JA |
6892 | free (temp); |
6893 | temp = tt; | |
6894 | } | |
ccc6cda3 JA |
6895 | break; |
6896 | case VT_POSPARMS: | |
6897 | temp = pos_params_pat_subst (val, p, rep, mflags); | |
7117c2d2 JA |
6898 | if (temp && (mflags & MATCH_QUOTED) == 0) |
6899 | { | |
6900 | tt = quote_escapes (temp); | |
6901 | free (temp); | |
6902 | temp = tt; | |
6903 | } | |
ccc6cda3 JA |
6904 | break; |
6905 | #if defined (ARRAY_VARS) | |
6906 | case VT_ARRAYVAR: | |
3185942a JA |
6907 | temp = assoc_p (v) ? assoc_patsub (assoc_cell (v), p, rep, mflags) |
6908 | : array_patsub (array_cell (v), p, rep, mflags); | |
6909 | /* Don't call quote_escapes anymore; array_patsub calls | |
6910 | array_quote_escapes as appropriate before adding the | |
6911 | space separators; ditto for assoc_patsub. */ | |
6912 | break; | |
6913 | #endif | |
6914 | } | |
6915 | ||
6916 | FREE (pat); | |
6917 | FREE (rep); | |
6918 | free (lpatsub); | |
6919 | ||
6920 | return temp; | |
6921 | } | |
6922 | ||
6923 | /****************************************************************/ | |
6924 | /* */ | |
6925 | /* Functions to perform case modification on variable values */ | |
6926 | /* */ | |
6927 | /****************************************************************/ | |
6928 | ||
6929 | /* Do case modification on the positional parameters. */ | |
6930 | ||
6931 | static char * | |
6932 | pos_params_modcase (string, pat, modop, mflags) | |
6933 | char *string, *pat; | |
6934 | int modop; | |
6935 | int mflags; | |
6936 | { | |
6937 | WORD_LIST *save, *params; | |
6938 | WORD_DESC *w; | |
6939 | char *ret; | |
6940 | int pchar, qflags; | |
6941 | ||
6942 | save = params = list_rest_of_args (); | |
6943 | if (save == 0) | |
6944 | return ((char *)NULL); | |
6945 | ||
6946 | for ( ; params; params = params->next) | |
6947 | { | |
6948 | ret = sh_modcase (params->word->word, pat, modop); | |
6949 | w = alloc_word_desc (); | |
6950 | w->word = ret ? ret : savestring (""); | |
6951 | dispose_word (params->word); | |
6952 | params->word = w; | |
6953 | } | |
6954 | ||
6955 | pchar = (mflags & MATCH_STARSUB) == MATCH_STARSUB ? '*' : '@'; | |
6956 | qflags = (mflags & MATCH_QUOTED) == MATCH_QUOTED ? Q_DOUBLE_QUOTES : 0; | |
6957 | ||
6958 | ret = string_list_pos_params (pchar, save, qflags); | |
6959 | dispose_words (save); | |
6960 | ||
6961 | return (ret); | |
6962 | } | |
6963 | ||
6964 | /* Perform case modification on VALUE, which is the expansion of | |
6965 | VARNAME. MODSPEC is an expression supplying the type of modification | |
6966 | to perform. QUOTED is a flags word containing the type of quoting | |
6967 | currently in effect. */ | |
6968 | static char * | |
495aee44 | 6969 | parameter_brace_casemod (varname, value, ind, modspec, patspec, quoted, flags) |
3185942a | 6970 | char *varname, *value; |
495aee44 | 6971 | int ind, modspec; |
3185942a | 6972 | char *patspec; |
495aee44 | 6973 | int quoted, flags; |
3185942a JA |
6974 | { |
6975 | int vtype, starsub, modop, mflags, x; | |
6976 | char *val, *temp, *pat, *p, *lpat, *tt; | |
6977 | SHELL_VAR *v; | |
6978 | ||
6979 | if (value == 0) | |
6980 | return ((char *)NULL); | |
6981 | ||
6982 | this_command_name = varname; | |
6983 | ||
495aee44 | 6984 | vtype = get_var_and_type (varname, value, ind, quoted, flags, &v, &val); |
3185942a JA |
6985 | if (vtype == -1) |
6986 | return ((char *)NULL); | |
6987 | ||
6988 | starsub = vtype & VT_STARSUB; | |
6989 | vtype &= ~VT_STARSUB; | |
6990 | ||
6991 | modop = 0; | |
6992 | mflags = 0; | |
6993 | if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) | |
6994 | mflags |= MATCH_QUOTED; | |
6995 | if (starsub) | |
6996 | mflags |= MATCH_STARSUB; | |
6997 | ||
6998 | p = patspec; | |
6999 | if (modspec == '^') | |
7000 | { | |
7001 | x = p && p[0] == modspec; | |
17345e5a | 7002 | modop = x ? CASE_UPPER : CASE_UPFIRST; |
3185942a JA |
7003 | p += x; |
7004 | } | |
7005 | else if (modspec == ',') | |
7006 | { | |
7007 | x = p && p[0] == modspec; | |
17345e5a | 7008 | modop = x ? CASE_LOWER : CASE_LOWFIRST; |
3185942a JA |
7009 | p += x; |
7010 | } | |
7011 | else if (modspec == '~') | |
7012 | { | |
7013 | x = p && p[0] == modspec; | |
7014 | modop = x ? CASE_TOGGLEALL : CASE_TOGGLE; | |
7015 | p += x; | |
7016 | } | |
7017 | ||
7018 | lpat = p ? savestring (p) : 0; | |
7019 | /* Perform the same expansions on the pattern as performed by the | |
7020 | pattern removal expansions. FOR LATER */ | |
7021 | pat = lpat ? getpattern (lpat, quoted, 1) : 0; | |
7022 | ||
7023 | /* OK, now we do the case modification. */ | |
7024 | switch (vtype) | |
7025 | { | |
7026 | case VT_VARIABLE: | |
7027 | case VT_ARRAYMEMBER: | |
7028 | temp = sh_modcase (val, pat, modop); | |
7029 | if (vtype == VT_VARIABLE) | |
7030 | FREE (val); | |
7031 | if (temp) | |
7032 | { | |
7033 | tt = (mflags & MATCH_QUOTED) ? quote_string (temp) : quote_escapes (temp); | |
7034 | free (temp); | |
7035 | temp = tt; | |
7036 | } | |
7037 | break; | |
7038 | ||
7039 | case VT_POSPARMS: | |
7040 | temp = pos_params_modcase (val, pat, modop, mflags); | |
7041 | if (temp && (mflags & MATCH_QUOTED) == 0) | |
7117c2d2 JA |
7042 | { |
7043 | tt = quote_escapes (temp); | |
7044 | free (temp); | |
7045 | temp = tt; | |
7046 | } | |
3185942a JA |
7047 | break; |
7048 | ||
7049 | #if defined (ARRAY_VARS) | |
7050 | case VT_ARRAYVAR: | |
7051 | temp = assoc_p (v) ? assoc_modcase (assoc_cell (v), pat, modop, mflags) | |
7052 | : array_modcase (array_cell (v), pat, modop, mflags); | |
7053 | /* Don't call quote_escapes; array_modcase calls array_quote_escapes | |
7054 | as appropriate before adding the space separators; ditto for | |
7055 | assoc_modcase. */ | |
ccc6cda3 JA |
7056 | break; |
7057 | #endif | |
7058 | } | |
7059 | ||
7060 | FREE (pat); | |
3185942a | 7061 | free (lpat); |
ccc6cda3 JA |
7062 | |
7063 | return temp; | |
7064 | } | |
7065 | ||
0628567a JA |
7066 | /* Check for unbalanced parens in S, which is the contents of $(( ... )). If |
7067 | any occur, this must be a nested command substitution, so return 0. | |
7068 | Otherwise, return 1. A valid arithmetic expression must always have a | |
7069 | ( before a matching ), so any cases where there are more right parens | |
7070 | means that this must not be an arithmetic expression, though the parser | |
7071 | will not accept it without a balanced total number of parens. */ | |
7072 | static int | |
7073 | chk_arithsub (s, len) | |
7074 | const char *s; | |
7075 | int len; | |
7076 | { | |
7077 | int i, count; | |
7078 | DECLARE_MBSTATE; | |
7079 | ||
7080 | i = count = 0; | |
7081 | while (i < len) | |
7082 | { | |
0001803f | 7083 | if (s[i] == LPAREN) |
0628567a | 7084 | count++; |
0001803f | 7085 | else if (s[i] == RPAREN) |
0628567a JA |
7086 | { |
7087 | count--; | |
7088 | if (count < 0) | |
7089 | return 0; | |
7090 | } | |
7091 | ||
7092 | switch (s[i]) | |
7093 | { | |
7094 | default: | |
7095 | ADVANCE_CHAR (s, len, i); | |
7096 | break; | |
7097 | ||
7098 | case '\\': | |
7099 | i++; | |
7100 | if (s[i]) | |
7101 | ADVANCE_CHAR (s, len, i); | |
7102 | break; | |
7103 | ||
7104 | case '\'': | |
7105 | i = skip_single_quoted (s, len, ++i); | |
7106 | break; | |
7107 | ||
7108 | case '"': | |
7109 | i = skip_double_quoted ((char *)s, len, ++i); | |
7110 | break; | |
7111 | } | |
7112 | } | |
7113 | ||
7114 | return (count == 0); | |
7115 | } | |
7116 | ||
cce855bc JA |
7117 | /****************************************************************/ |
7118 | /* */ | |
7119 | /* Functions to perform parameter expansion on a string */ | |
7120 | /* */ | |
7121 | /****************************************************************/ | |
7122 | ||
3185942a | 7123 | /* ${[#][!]name[[:][^[^]][,[,]]#[#]%[%]-=?+[word][:e1[:e2]]]} */ |
95732b49 | 7124 | static WORD_DESC * |
0001803f | 7125 | parameter_brace_expand (string, indexp, quoted, pflags, quoted_dollar_atp, contains_dollar_at) |
ccc6cda3 | 7126 | char *string; |
0001803f | 7127 | int *indexp, quoted, *quoted_dollar_atp, *contains_dollar_at, pflags; |
ccc6cda3 JA |
7128 | { |
7129 | int check_nullness, var_is_set, var_is_null, var_is_special; | |
3185942a | 7130 | int want_substring, want_indir, want_patsub, want_casemod; |
ccc6cda3 | 7131 | char *name, *value, *temp, *temp1; |
95732b49 | 7132 | WORD_DESC *tdesc, *ret; |
3185942a | 7133 | int t_index, sindex, c, tflag, modspec; |
7117c2d2 | 7134 | intmax_t number; |
495aee44 | 7135 | arrayind_t ind; |
ccc6cda3 | 7136 | |
3185942a | 7137 | temp = temp1 = value = (char *)NULL; |
ccc6cda3 | 7138 | var_is_set = var_is_null = var_is_special = check_nullness = 0; |
3185942a | 7139 | want_substring = want_indir = want_patsub = want_casemod = 0; |
ccc6cda3 | 7140 | |
cce855bc JA |
7141 | sindex = *indexp; |
7142 | t_index = ++sindex; | |
0628567a JA |
7143 | /* ${#var} doesn't have any of the other parameter expansions on it. */ |
7144 | if (string[t_index] == '#' && legal_variable_starter (string[t_index+1])) /* {{ */ | |
3185942a | 7145 | name = string_extract (string, &t_index, "}", SX_VARNAME); |
0628567a | 7146 | else |
3185942a JA |
7147 | #if defined (CASEMOD_EXPANSIONS) |
7148 | /* To enable case-toggling expansions using the `~' operator character | |
7149 | change the 1 to 0. */ | |
7150 | # if defined (CASEMOD_CAPCASE) | |
7151 | name = string_extract (string, &t_index, "#%^,~:-=?+/}", SX_VARNAME); | |
7152 | # else | |
7153 | name = string_extract (string, &t_index, "#%^,:-=?+/}", SX_VARNAME); | |
7154 | # endif /* CASEMOD_CAPCASE */ | |
7155 | #else | |
7156 | name = string_extract (string, &t_index, "#%:-=?+/}", SX_VARNAME); | |
7157 | #endif /* CASEMOD_EXPANSIONS */ | |
cce855bc | 7158 | |
95732b49 JA |
7159 | ret = 0; |
7160 | tflag = 0; | |
7161 | ||
495aee44 CR |
7162 | ind = INTMAX_MIN; |
7163 | ||
cce855bc JA |
7164 | /* If the name really consists of a special variable, then make sure |
7165 | that we have the entire name. We don't allow indirect references | |
7166 | to special variables except `#', `?', `@' and `*'. */ | |
495aee44 CR |
7167 | if ((sindex == t_index && VALID_SPECIAL_LENGTH_PARAM (string[t_index])) || |
7168 | (sindex == t_index - 1 && string[sindex] == '!' && VALID_INDIR_PARAM (string[t_index]))) | |
ccc6cda3 JA |
7169 | { |
7170 | t_index++; | |
ccc6cda3 | 7171 | temp1 = string_extract (string, &t_index, "#%:-=?+/}", 0); |
ac50fbac | 7172 | name = (char *)xrealloc (name, 3 + (strlen (temp1))); |
ccc6cda3 JA |
7173 | *name = string[sindex]; |
7174 | if (string[sindex] == '!') | |
7175 | { | |
28ef6c31 JA |
7176 | /* indirect reference of $#, $?, $@, or $* */ |
7177 | name[1] = string[sindex + 1]; | |
7178 | strcpy (name + 2, temp1); | |
ccc6cda3 | 7179 | } |
cce855bc | 7180 | else |
ccc6cda3 JA |
7181 | strcpy (name + 1, temp1); |
7182 | free (temp1); | |
7183 | } | |
7184 | sindex = t_index; | |
7185 | ||
7186 | /* Find out what character ended the variable name. Then | |
7187 | do the appropriate thing. */ | |
7188 | if (c = string[sindex]) | |
7189 | sindex++; | |
7190 | ||
7191 | /* If c is followed by one of the valid parameter expansion | |
7192 | characters, move past it as normal. If not, assume that | |
7193 | a substring specification is being given, and do not move | |
7194 | past it. */ | |
28ef6c31 | 7195 | if (c == ':' && VALID_PARAM_EXPAND_CHAR (string[sindex])) |
ccc6cda3 JA |
7196 | { |
7197 | check_nullness++; | |
7198 | if (c = string[sindex]) | |
7199 | sindex++; | |
7200 | } | |
cce855bc | 7201 | else if (c == ':' && string[sindex] != RBRACE) |
ccc6cda3 | 7202 | want_substring = 1; |
ac50fbac | 7203 | else if (c == '/' /* && string[sindex] != RBRACE */) /* XXX */ |
ccc6cda3 | 7204 | want_patsub = 1; |
3185942a JA |
7205 | #if defined (CASEMOD_EXPANSIONS) |
7206 | else if (c == '^' || c == ',' || c == '~') | |
7207 | { | |
7208 | modspec = c; | |
7209 | want_casemod = 1; | |
7210 | } | |
7211 | #endif | |
ccc6cda3 | 7212 | |
cce855bc JA |
7213 | /* Catch the valid and invalid brace expressions that made it through the |
7214 | tests above. */ | |
7215 | /* ${#-} is a valid expansion and means to take the length of $-. | |
7216 | Similarly for ${#?} and ${##}... */ | |
7217 | if (name[0] == '#' && name[1] == '\0' && check_nullness == 0 && | |
28ef6c31 | 7218 | VALID_SPECIAL_LENGTH_PARAM (c) && string[sindex] == RBRACE) |
cce855bc | 7219 | { |
f73dda09 | 7220 | name = (char *)xrealloc (name, 3); |
cce855bc JA |
7221 | name[1] = c; |
7222 | name[2] = '\0'; | |
7223 | c = string[sindex++]; | |
7224 | } | |
7225 | ||
7226 | /* ...but ${#%}, ${#:}, ${#=}, ${#+}, and ${#/} are errors. */ | |
7227 | if (name[0] == '#' && name[1] == '\0' && check_nullness == 0 && | |
7228 | member (c, "%:=+/") && string[sindex] == RBRACE) | |
7229 | { | |
7230 | temp = (char *)NULL; | |
7231 | goto bad_substitution; | |
7232 | } | |
7233 | ||
7234 | /* Indirect expansion begins with a `!'. A valid indirect expansion is | |
7235 | either a variable name, one of the positional parameters or a special | |
7236 | variable that expands to one of the positional parameters. */ | |
7237 | want_indir = *name == '!' && | |
f73dda09 | 7238 | (legal_variable_starter ((unsigned char)name[1]) || DIGIT (name[1]) |
7117c2d2 | 7239 | || VALID_INDIR_PARAM (name[1])); |
ccc6cda3 JA |
7240 | |
7241 | /* Determine the value of this variable. */ | |
7242 | ||
cce855bc | 7243 | /* Check for special variables, directly referenced. */ |
bb70624e | 7244 | if (SPECIAL_VAR (name, want_indir)) |
ccc6cda3 JA |
7245 | var_is_special++; |
7246 | ||
cce855bc JA |
7247 | /* Check for special expansion things, like the length of a parameter */ |
7248 | if (*name == '#' && name[1]) | |
ccc6cda3 | 7249 | { |
cce855bc | 7250 | /* If we are not pointing at the character just after the |
28ef6c31 JA |
7251 | closing brace, then we haven't gotten all of the name. |
7252 | Since it begins with a special character, this is a bad | |
7253 | substitution. Also check NAME for validity before trying | |
7254 | to go on. */ | |
cce855bc | 7255 | if (string[sindex - 1] != RBRACE || (valid_length_expression (name) == 0)) |
ccc6cda3 JA |
7256 | { |
7257 | temp = (char *)NULL; | |
7258 | goto bad_substitution; | |
7259 | } | |
7260 | ||
7261 | number = parameter_brace_expand_length (name); | |
495aee44 CR |
7262 | if (number == INTMAX_MIN && unbound_vars_is_error) |
7263 | { | |
7264 | last_command_exit_value = EXECUTION_FAILURE; | |
7265 | err_unboundvar (name+1); | |
7266 | free (name); | |
7267 | return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal); | |
7268 | } | |
ccc6cda3 JA |
7269 | free (name); |
7270 | ||
7271 | *indexp = sindex; | |
95732b49 JA |
7272 | if (number < 0) |
7273 | return (&expand_wdesc_error); | |
7274 | else | |
7275 | { | |
7276 | ret = alloc_word_desc (); | |
7277 | ret->word = itos (number); | |
7278 | return ret; | |
7279 | } | |
ccc6cda3 JA |
7280 | } |
7281 | ||
7282 | /* ${@} is identical to $@. */ | |
7283 | if (name[0] == '@' && name[1] == '\0') | |
7284 | { | |
7285 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp) | |
7286 | *quoted_dollar_atp = 1; | |
7287 | ||
7288 | if (contains_dollar_at) | |
7289 | *contains_dollar_at = 1; | |
ac50fbac CR |
7290 | |
7291 | tflag |= W_DOLLARAT; | |
ccc6cda3 JA |
7292 | } |
7293 | ||
b80f6443 | 7294 | /* Process ${!PREFIX*} expansion. */ |
bb70624e JA |
7295 | if (want_indir && string[sindex - 1] == RBRACE && |
7296 | (string[sindex - 2] == '*' || string[sindex - 2] == '@') && | |
f73dda09 | 7297 | legal_variable_starter ((unsigned char) name[1])) |
bb70624e JA |
7298 | { |
7299 | char **x; | |
7300 | WORD_LIST *xlist; | |
7301 | ||
7302 | temp1 = savestring (name + 1); | |
7303 | number = strlen (temp1); | |
7304 | temp1[number - 1] = '\0'; | |
7305 | x = all_variables_matching_prefix (temp1); | |
7117c2d2 | 7306 | xlist = strvec_to_word_list (x, 0, 0); |
28ef6c31 JA |
7307 | if (string[sindex - 2] == '*') |
7308 | temp = string_list_dollar_star (xlist); | |
7309 | else | |
7310 | { | |
7311 | temp = string_list_dollar_at (xlist, quoted); | |
7312 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp) | |
7313 | *quoted_dollar_atp = 1; | |
7314 | if (contains_dollar_at) | |
7315 | *contains_dollar_at = 1; | |
ac50fbac CR |
7316 | |
7317 | tflag |= W_DOLLARAT; | |
28ef6c31 | 7318 | } |
bb70624e | 7319 | free (x); |
89a92869 | 7320 | dispose_words (xlist); |
bb70624e JA |
7321 | free (temp1); |
7322 | *indexp = sindex; | |
95732b49 | 7323 | |
ac50fbac CR |
7324 | free (name); |
7325 | ||
95732b49 JA |
7326 | ret = alloc_word_desc (); |
7327 | ret->word = temp; | |
ac50fbac | 7328 | ret->flags = tflag; /* XXX */ |
95732b49 | 7329 | return ret; |
bb70624e | 7330 | } |
b80f6443 JA |
7331 | |
7332 | #if defined (ARRAY_VARS) | |
7333 | /* Process ${!ARRAY[@]} and ${!ARRAY[*]} expansion. */ /* [ */ | |
7334 | if (want_indir && string[sindex - 1] == RBRACE && | |
7335 | string[sindex - 2] == ']' && valid_array_reference (name+1)) | |
7336 | { | |
7337 | char *x, *x1; | |
7338 | ||
7339 | temp1 = savestring (name + 1); | |
7340 | x = array_variable_name (temp1, &x1, (int *)0); /* [ */ | |
7341 | FREE (x); | |
7342 | if (ALL_ELEMENT_SUB (x1[0]) && x1[1] == ']') | |
7343 | { | |
3185942a | 7344 | temp = array_keys (temp1, quoted); /* handles assoc vars too */ |
b80f6443 JA |
7345 | if (x1[0] == '@') |
7346 | { | |
7347 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp) | |
7348 | *quoted_dollar_atp = 1; | |
7349 | if (contains_dollar_at) | |
7350 | *contains_dollar_at = 1; | |
ac50fbac CR |
7351 | |
7352 | tflag |= W_DOLLARAT; | |
b80f6443 JA |
7353 | } |
7354 | ||
7355 | free (temp1); | |
7356 | *indexp = sindex; | |
95732b49 JA |
7357 | |
7358 | ret = alloc_word_desc (); | |
7359 | ret->word = temp; | |
ac50fbac | 7360 | ret->flags = tflag; /* XXX */ |
95732b49 | 7361 | return ret; |
b80f6443 JA |
7362 | } |
7363 | ||
7364 | free (temp1); | |
7365 | } | |
7366 | #endif /* ARRAY_VARS */ | |
bb70624e | 7367 | |
ccc6cda3 JA |
7368 | /* Make sure that NAME is valid before trying to go on. */ |
7369 | if (valid_brace_expansion_word (want_indir ? name + 1 : name, | |
7370 | var_is_special) == 0) | |
7371 | { | |
7372 | temp = (char *)NULL; | |
7373 | goto bad_substitution; | |
7374 | } | |
7375 | ||
7376 | if (want_indir) | |
1a1f8b54 CR |
7377 | { |
7378 | tdesc = parameter_brace_expand_indir (name + 1, var_is_special, quoted, quoted_dollar_atp, contains_dollar_at); | |
7379 | /* Turn off the W_ARRAYIND flag because there is no way for this function | |
7380 | to return the index we're supposed to be using. */ | |
7381 | if (tdesc && tdesc->flags) | |
7382 | tdesc->flags &= ~W_ARRAYIND; | |
7383 | } | |
95732b49 | 7384 | else |
ac50fbac | 7385 | tdesc = parameter_brace_expand_word (name, var_is_special, quoted, PF_IGNUNBOUND|(pflags&(PF_NOSPLIT2|PF_ASSIGNRHS)), &ind); |
95732b49 JA |
7386 | |
7387 | if (tdesc) | |
7388 | { | |
7389 | temp = tdesc->word; | |
7390 | tflag = tdesc->flags; | |
7391 | dispose_word_desc (tdesc); | |
7392 | } | |
ccc6cda3 | 7393 | else |
95732b49 | 7394 | temp = (char *)0; |
ccc6cda3 | 7395 | |
ac50fbac CR |
7396 | if (temp == &expand_param_error || temp == &expand_param_fatal) |
7397 | { | |
7398 | FREE (name); | |
7399 | FREE (value); | |
7400 | return (temp == &expand_param_error ? &expand_wdesc_error : &expand_wdesc_fatal); | |
7401 | } | |
7402 | ||
ccc6cda3 | 7403 | #if defined (ARRAY_VARS) |
cce855bc | 7404 | if (valid_array_reference (name)) |
b80f6443 | 7405 | chk_atstar (name, quoted, quoted_dollar_atp, contains_dollar_at); |
ccc6cda3 JA |
7406 | #endif |
7407 | ||
7408 | var_is_set = temp != (char *)0; | |
7409 | var_is_null = check_nullness && (var_is_set == 0 || *temp == 0); | |
ac50fbac CR |
7410 | /* XXX - this may not need to be restricted to special variables */ |
7411 | if (check_nullness) | |
7412 | var_is_null |= var_is_set && var_is_special && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && QUOTED_NULL (temp); | |
ccc6cda3 JA |
7413 | |
7414 | /* Get the rest of the stuff inside the braces. */ | |
cce855bc | 7415 | if (c && c != RBRACE) |
ccc6cda3 JA |
7416 | { |
7417 | /* Extract the contents of the ${ ... } expansion | |
28ef6c31 | 7418 | according to the Posix.2 rules. */ |
49ed961b | 7419 | value = extract_dollar_brace_string (string, &sindex, quoted, (c == '%' || c == '#' || c =='/' || c == '^' || c == ',' || c ==':') ? SX_POSIXEXP|SX_WORD : SX_WORD); |
cce855bc | 7420 | if (string[sindex] == RBRACE) |
28ef6c31 | 7421 | sindex++; |
ccc6cda3 JA |
7422 | else |
7423 | goto bad_substitution; | |
7424 | } | |
7425 | else | |
7426 | value = (char *)NULL; | |
726f6388 | 7427 | |
ccc6cda3 JA |
7428 | *indexp = sindex; |
7429 | ||
495aee44 CR |
7430 | /* All the cases where an expansion can possibly generate an unbound |
7431 | variable error. */ | |
7432 | if (want_substring || want_patsub || want_casemod || c == '#' || c == '%' || c == RBRACE) | |
7433 | { | |
7434 | if (var_is_set == 0 && unbound_vars_is_error && ((name[0] != '@' && name[0] != '*') || name[1])) | |
7435 | { | |
7436 | last_command_exit_value = EXECUTION_FAILURE; | |
7437 | err_unboundvar (name); | |
7438 | FREE (value); | |
7439 | FREE (temp); | |
7440 | free (name); | |
7441 | return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal); | |
7442 | } | |
7443 | } | |
7444 | ||
ccc6cda3 JA |
7445 | /* If this is a substring spec, process it and add the result. */ |
7446 | if (want_substring) | |
726f6388 | 7447 | { |
495aee44 | 7448 | temp1 = parameter_brace_substring (name, temp, ind, value, quoted, (tflag & W_ARRAYIND) ? AV_USEIND : 0); |
ccc6cda3 JA |
7449 | FREE (name); |
7450 | FREE (value); | |
7451 | FREE (temp); | |
95732b49 JA |
7452 | |
7453 | if (temp1 == &expand_param_error) | |
7454 | return (&expand_wdesc_error); | |
7455 | else if (temp1 == &expand_param_fatal) | |
7456 | return (&expand_wdesc_fatal); | |
7457 | ||
7458 | ret = alloc_word_desc (); | |
7459 | ret->word = temp1; | |
ac50fbac CR |
7460 | /* We test quoted_dollar_atp because we want variants with double-quoted |
7461 | "$@" to take a different code path. In fact, we make sure at the end | |
7462 | of expand_word_internal that we're only looking at these flags if | |
7463 | quoted_dollar_at == 0. */ | |
7464 | if (temp1 && | |
7465 | (quoted_dollar_atp == 0 || *quoted_dollar_atp == 0) && | |
7466 | QUOTED_NULL (temp1) && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) | |
0628567a | 7467 | ret->flags |= W_QUOTED|W_HASQUOTEDNULL; |
95732b49 | 7468 | return ret; |
726f6388 | 7469 | } |
ccc6cda3 | 7470 | else if (want_patsub) |
726f6388 | 7471 | { |
495aee44 | 7472 | temp1 = parameter_brace_patsub (name, temp, ind, value, quoted, (tflag & W_ARRAYIND) ? AV_USEIND : 0); |
ccc6cda3 JA |
7473 | FREE (name); |
7474 | FREE (value); | |
7475 | FREE (temp); | |
95732b49 JA |
7476 | |
7477 | if (temp1 == &expand_param_error) | |
7478 | return (&expand_wdesc_error); | |
7479 | else if (temp1 == &expand_param_fatal) | |
7480 | return (&expand_wdesc_fatal); | |
7481 | ||
7482 | ret = alloc_word_desc (); | |
7483 | ret->word = temp1; | |
ac50fbac CR |
7484 | if (temp1 && |
7485 | (quoted_dollar_atp == 0 || *quoted_dollar_atp == 0) && | |
7486 | QUOTED_NULL (temp1) && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) | |
3185942a | 7487 | ret->flags |= W_QUOTED|W_HASQUOTEDNULL; |
95732b49 | 7488 | return ret; |
ccc6cda3 | 7489 | } |
3185942a JA |
7490 | #if defined (CASEMOD_EXPANSIONS) |
7491 | else if (want_casemod) | |
7492 | { | |
495aee44 | 7493 | temp1 = parameter_brace_casemod (name, temp, ind, modspec, value, quoted, (tflag & W_ARRAYIND) ? AV_USEIND : 0); |
3185942a JA |
7494 | FREE (name); |
7495 | FREE (value); | |
7496 | FREE (temp); | |
7497 | ||
7498 | if (temp1 == &expand_param_error) | |
7499 | return (&expand_wdesc_error); | |
7500 | else if (temp1 == &expand_param_fatal) | |
7501 | return (&expand_wdesc_fatal); | |
7502 | ||
7503 | ret = alloc_word_desc (); | |
7504 | ret->word = temp1; | |
ac50fbac CR |
7505 | if (temp1 && |
7506 | (quoted_dollar_atp == 0 || *quoted_dollar_atp == 0) && | |
7507 | QUOTED_NULL (temp1) && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) | |
3185942a JA |
7508 | ret->flags |= W_QUOTED|W_HASQUOTEDNULL; |
7509 | return ret; | |
7510 | } | |
7511 | #endif | |
726f6388 | 7512 | |
ccc6cda3 JA |
7513 | /* Do the right thing based on which character ended the variable name. */ |
7514 | switch (c) | |
7515 | { | |
7516 | default: | |
7517 | case '\0': | |
7518 | bad_substitution: | |
98043138 | 7519 | last_command_exit_value = EXECUTION_FAILURE; |
b80f6443 | 7520 | report_error (_("%s: bad substitution"), string ? string : "??"); |
ccc6cda3 JA |
7521 | FREE (value); |
7522 | FREE (temp); | |
7523 | free (name); | |
95732b49 | 7524 | return &expand_wdesc_error; |
ccc6cda3 | 7525 | |
cce855bc | 7526 | case RBRACE: |
ccc6cda3 | 7527 | break; |
726f6388 | 7528 | |
ccc6cda3 JA |
7529 | case '#': /* ${param#[#]pattern} */ |
7530 | case '%': /* ${param%[%]pattern} */ | |
7531 | if (value == 0 || *value == '\0' || temp == 0 || *temp == '\0') | |
28ef6c31 JA |
7532 | { |
7533 | FREE (value); | |
ccc6cda3 | 7534 | break; |
28ef6c31 | 7535 | } |
495aee44 | 7536 | temp1 = parameter_brace_remove_pattern (name, temp, ind, value, c, quoted, (tflag & W_ARRAYIND) ? AV_USEIND : 0); |
ccc6cda3 JA |
7537 | free (temp); |
7538 | free (value); | |
495aee44 | 7539 | free (name); |
3185942a JA |
7540 | |
7541 | ret = alloc_word_desc (); | |
7542 | ret->word = temp1; | |
7543 | if (temp1 && QUOTED_NULL (temp1) && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) | |
7544 | ret->flags |= W_QUOTED|W_HASQUOTEDNULL; | |
7545 | return ret; | |
ccc6cda3 JA |
7546 | |
7547 | case '-': | |
7548 | case '=': | |
7549 | case '?': | |
7550 | case '+': | |
7551 | if (var_is_set && var_is_null == 0) | |
28ef6c31 JA |
7552 | { |
7553 | /* If the operator is `+', we don't want the value of the named | |
7554 | variable for anything, just the value of the right hand side. */ | |
ccc6cda3 JA |
7555 | if (c == '+') |
7556 | { | |
28ef6c31 JA |
7557 | /* XXX -- if we're double-quoted and the named variable is "$@", |
7558 | we want to turn off any special handling of "$@" -- | |
7559 | we're not using it, so whatever is on the rhs applies. */ | |
7560 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp) | |
7561 | *quoted_dollar_atp = 0; | |
7562 | if (contains_dollar_at) | |
7563 | *contains_dollar_at = 0; | |
7564 | ||
ccc6cda3 JA |
7565 | FREE (temp); |
7566 | if (value) | |
28ef6c31 | 7567 | { |
495aee44 CR |
7568 | /* From Posix discussion on austin-group list. Issue 221 |
7569 | requires that backslashes escaping `}' inside | |
7570 | double-quoted ${...} be removed. */ | |
7571 | if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) | |
7572 | quoted |= Q_DOLBRACE; | |
95732b49 JA |
7573 | ret = parameter_brace_expand_rhs (name, value, c, |
7574 | quoted, | |
7575 | quoted_dollar_atp, | |
7576 | contains_dollar_at); | |
7577 | /* XXX - fix up later, esp. noting presence of | |
7578 | W_HASQUOTEDNULL in ret->flags */ | |
ccc6cda3 JA |
7579 | free (value); |
7580 | } | |
7581 | else | |
28ef6c31 | 7582 | temp = (char *)NULL; |
ccc6cda3 JA |
7583 | } |
7584 | else | |
7585 | { | |
7586 | FREE (value); | |
7587 | } | |
7588 | /* Otherwise do nothing; just use the value in TEMP. */ | |
726f6388 | 7589 | } |
ccc6cda3 | 7590 | else /* VAR not set or VAR is NULL. */ |
28ef6c31 | 7591 | { |
ccc6cda3 JA |
7592 | FREE (temp); |
7593 | temp = (char *)NULL; | |
7594 | if (c == '=' && var_is_special) | |
7595 | { | |
ac50fbac | 7596 | last_command_exit_value = EXECUTION_FAILURE; |
b80f6443 | 7597 | report_error (_("$%s: cannot assign in this way"), name); |
ccc6cda3 JA |
7598 | free (name); |
7599 | free (value); | |
95732b49 | 7600 | return &expand_wdesc_error; |
ccc6cda3 JA |
7601 | } |
7602 | else if (c == '?') | |
7603 | { | |
7604 | parameter_brace_expand_error (name, value); | |
95732b49 | 7605 | return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal); |
ccc6cda3 JA |
7606 | } |
7607 | else if (c != '+') | |
28ef6c31 JA |
7608 | { |
7609 | /* XXX -- if we're double-quoted and the named variable is "$@", | |
7610 | we want to turn off any special handling of "$@" -- | |
7611 | we're not using it, so whatever is on the rhs applies. */ | |
7612 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && quoted_dollar_atp) | |
7613 | *quoted_dollar_atp = 0; | |
7614 | if (contains_dollar_at) | |
7615 | *contains_dollar_at = 0; | |
7616 | ||
495aee44 CR |
7617 | /* From Posix discussion on austin-group list. Issue 221 requires |
7618 | that backslashes escaping `}' inside double-quoted ${...} be | |
7619 | removed. */ | |
7620 | if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) | |
7621 | quoted |= Q_DOLBRACE; | |
95732b49 JA |
7622 | ret = parameter_brace_expand_rhs (name, value, c, quoted, |
7623 | quoted_dollar_atp, | |
7624 | contains_dollar_at); | |
7625 | /* XXX - fix up later, esp. noting presence of | |
7626 | W_HASQUOTEDNULL in tdesc->flags */ | |
28ef6c31 | 7627 | } |
ccc6cda3 | 7628 | free (value); |
726f6388 | 7629 | } |
28ef6c31 | 7630 | |
ccc6cda3 | 7631 | break; |
726f6388 | 7632 | } |
ccc6cda3 | 7633 | free (name); |
95732b49 JA |
7634 | |
7635 | if (ret == 0) | |
7636 | { | |
7637 | ret = alloc_word_desc (); | |
7638 | ret->flags = tflag; | |
7639 | ret->word = temp; | |
7640 | } | |
7641 | return (ret); | |
726f6388 JA |
7642 | } |
7643 | ||
cce855bc JA |
7644 | /* Expand a single ${xxx} expansion. The braces are optional. When |
7645 | the braces are used, parameter_brace_expand() does the work, | |
7646 | possibly calling param_expand recursively. */ | |
95732b49 | 7647 | static WORD_DESC * |
cce855bc JA |
7648 | param_expand (string, sindex, quoted, expanded_something, |
7649 | contains_dollar_at, quoted_dollar_at_p, had_quoted_null_p, | |
7650 | pflags) | |
7651 | char *string; | |
7652 | int *sindex, quoted, *expanded_something, *contains_dollar_at; | |
7653 | int *quoted_dollar_at_p, *had_quoted_null_p, pflags; | |
7654 | { | |
7117c2d2 | 7655 | char *temp, *temp1, uerror[3]; |
f73dda09 JA |
7656 | int zindex, t_index, expok; |
7657 | unsigned char c; | |
7117c2d2 | 7658 | intmax_t number; |
cce855bc | 7659 | SHELL_VAR *var; |
f73dda09 | 7660 | WORD_LIST *list; |
95732b49 JA |
7661 | WORD_DESC *tdesc, *ret; |
7662 | int tflag; | |
cce855bc JA |
7663 | |
7664 | zindex = *sindex; | |
7665 | c = string[++zindex]; | |
7666 | ||
7667 | temp = (char *)NULL; | |
95732b49 JA |
7668 | ret = tdesc = (WORD_DESC *)NULL; |
7669 | tflag = 0; | |
cce855bc JA |
7670 | |
7671 | /* Do simple cases first. Switch on what follows '$'. */ | |
7672 | switch (c) | |
7673 | { | |
7674 | /* $0 .. $9? */ | |
7675 | case '0': | |
7676 | case '1': | |
7677 | case '2': | |
7678 | case '3': | |
7679 | case '4': | |
7680 | case '5': | |
7681 | case '6': | |
7682 | case '7': | |
7683 | case '8': | |
7684 | case '9': | |
f73dda09 | 7685 | temp1 = dollar_vars[TODIGIT (c)]; |
cce855bc JA |
7686 | if (unbound_vars_is_error && temp1 == (char *)NULL) |
7687 | { | |
7117c2d2 JA |
7688 | uerror[0] = '$'; |
7689 | uerror[1] = c; | |
7690 | uerror[2] = '\0'; | |
cce855bc | 7691 | last_command_exit_value = EXECUTION_FAILURE; |
0001803f | 7692 | err_unboundvar (uerror); |
95732b49 | 7693 | return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal); |
cce855bc | 7694 | } |
b80f6443 JA |
7695 | if (temp1) |
7696 | temp = (*temp1 && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) | |
7697 | ? quote_string (temp1) | |
7698 | : quote_escapes (temp1); | |
7699 | else | |
7700 | temp = (char *)NULL; | |
95732b49 | 7701 | |
cce855bc JA |
7702 | break; |
7703 | ||
7704 | /* $$ -- pid of the invoking shell. */ | |
7705 | case '$': | |
7706 | temp = itos (dollar_dollar_pid); | |
7707 | break; | |
7708 | ||
7709 | /* $# -- number of positional parameters. */ | |
7710 | case '#': | |
7711 | temp = itos (number_of_args ()); | |
7712 | break; | |
7713 | ||
7714 | /* $? -- return value of the last synchronous command. */ | |
7715 | case '?': | |
7716 | temp = itos (last_command_exit_value); | |
7717 | break; | |
7718 | ||
7719 | /* $- -- flags supplied to the shell on invocation or by `set'. */ | |
7720 | case '-': | |
7721 | temp = which_set_flags (); | |
7722 | break; | |
7723 | ||
7724 | /* $! -- Pid of the last asynchronous command. */ | |
7725 | case '!': | |
7726 | /* If no asynchronous pids have been created, expand to nothing. | |
7727 | If `set -u' has been executed, and no async processes have | |
7728 | been created, this is an expansion error. */ | |
7729 | if (last_asynchronous_pid == NO_PID) | |
7730 | { | |
7731 | if (expanded_something) | |
7732 | *expanded_something = 0; | |
7733 | temp = (char *)NULL; | |
7734 | if (unbound_vars_is_error) | |
7735 | { | |
7117c2d2 JA |
7736 | uerror[0] = '$'; |
7737 | uerror[1] = c; | |
7738 | uerror[2] = '\0'; | |
cce855bc | 7739 | last_command_exit_value = EXECUTION_FAILURE; |
0001803f | 7740 | err_unboundvar (uerror); |
95732b49 | 7741 | return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal); |
cce855bc JA |
7742 | } |
7743 | } | |
7744 | else | |
f73dda09 | 7745 | temp = itos (last_asynchronous_pid); |
cce855bc JA |
7746 | break; |
7747 | ||
7748 | /* The only difference between this and $@ is when the arg is quoted. */ | |
7749 | case '*': /* `$*' */ | |
7750 | list = list_rest_of_args (); | |
7751 | ||
89a92869 CR |
7752 | #if 0 |
7753 | /* According to austin-group posix proposal by Geoff Clare in | |
7754 | <20090505091501.GA10097@squonk.masqnet> of 5 May 2009: | |
7755 | ||
7756 | "The shell shall write a message to standard error and | |
7757 | immediately exit when it tries to expand an unset parameter | |
7758 | other than the '@' and '*' special parameters." | |
7759 | */ | |
7760 | ||
7761 | if (list == 0 && unbound_vars_is_error && (pflags & PF_IGNUNBOUND) == 0) | |
3185942a JA |
7762 | { |
7763 | uerror[0] = '$'; | |
7764 | uerror[1] = '*'; | |
7765 | uerror[2] = '\0'; | |
3185942a | 7766 | last_command_exit_value = EXECUTION_FAILURE; |
89a92869 | 7767 | err_unboundvar (uerror); |
3185942a JA |
7768 | return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal); |
7769 | } | |
89a92869 | 7770 | #endif |
3185942a | 7771 | |
cce855bc JA |
7772 | /* If there are no command-line arguments, this should just |
7773 | disappear if there are other characters in the expansion, | |
7774 | even if it's quoted. */ | |
7775 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && list == 0) | |
7776 | temp = (char *)NULL; | |
0001803f | 7777 | else if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES|Q_PATQUOTE)) |
cce855bc JA |
7778 | { |
7779 | /* If we have "$*" we want to make a string of the positional | |
7780 | parameters, separated by the first character of $IFS, and | |
7781 | quote the whole string, including the separators. If IFS | |
7782 | is unset, the parameters are separated by ' '; if $IFS is | |
7783 | null, the parameters are concatenated. */ | |
0001803f | 7784 | temp = (quoted & (Q_DOUBLE_QUOTES|Q_PATQUOTE)) ? string_list_dollar_star (list) : string_list (list); |
495aee44 CR |
7785 | if (temp) |
7786 | { | |
7787 | temp1 = quote_string (temp); | |
7788 | if (*temp == 0) | |
7789 | tflag |= W_HASQUOTEDNULL; | |
7790 | free (temp); | |
7791 | temp = temp1; | |
7792 | } | |
cce855bc JA |
7793 | } |
7794 | else | |
28ef6c31 | 7795 | { |
95732b49 JA |
7796 | /* We check whether or not we're eventually going to split $* here, |
7797 | for example when IFS is empty and we are processing the rhs of | |
7798 | an assignment statement. In that case, we don't separate the | |
7799 | arguments at all. Otherwise, if the $* is not quoted it is | |
7800 | identical to $@ */ | |
95732b49 JA |
7801 | # if defined (HANDLE_MULTIBYTE) |
7802 | if (expand_no_split_dollar_star && ifs_firstc[0] == 0) | |
7803 | # else | |
7804 | if (expand_no_split_dollar_star && ifs_firstc == 0) | |
7805 | # endif | |
7806 | temp = string_list_dollar_star (list); | |
7807 | else | |
ac50fbac CR |
7808 | { |
7809 | temp = string_list_dollar_at (list, quoted); | |
7810 | if (quoted == 0 && (ifs_is_set == 0 || ifs_is_null)) | |
7811 | tflag |= W_SPLITSPACE; | |
7812 | } | |
7813 | ||
28ef6c31 JA |
7814 | if (expand_no_split_dollar_star == 0 && contains_dollar_at) |
7815 | *contains_dollar_at = 1; | |
7816 | } | |
cce855bc JA |
7817 | |
7818 | dispose_words (list); | |
7819 | break; | |
7820 | ||
7821 | /* When we have "$@" what we want is "$1" "$2" "$3" ... This | |
7822 | means that we have to turn quoting off after we split into | |
7823 | the individually quoted arguments so that the final split | |
7824 | on the first character of $IFS is still done. */ | |
7825 | case '@': /* `$@' */ | |
7826 | list = list_rest_of_args (); | |
7827 | ||
89a92869 CR |
7828 | #if 0 |
7829 | /* According to austin-group posix proposal by Geoff Clare in | |
7830 | <20090505091501.GA10097@squonk.masqnet> of 5 May 2009: | |
7831 | ||
7832 | "The shell shall write a message to standard error and | |
7833 | immediately exit when it tries to expand an unset parameter | |
7834 | other than the '@' and '*' special parameters." | |
7835 | */ | |
7836 | ||
7837 | if (list == 0 && unbound_vars_is_error && (pflags & PF_IGNUNBOUND) == 0) | |
3185942a JA |
7838 | { |
7839 | uerror[0] = '$'; | |
7840 | uerror[1] = '@'; | |
7841 | uerror[2] = '\0'; | |
3185942a | 7842 | last_command_exit_value = EXECUTION_FAILURE; |
89a92869 | 7843 | err_unboundvar (uerror); |
3185942a JA |
7844 | return (interactive_shell ? &expand_wdesc_error : &expand_wdesc_fatal); |
7845 | } | |
89a92869 | 7846 | #endif |
3185942a | 7847 | |
cce855bc JA |
7848 | /* We want to flag the fact that we saw this. We can't turn |
7849 | off quoting entirely, because other characters in the | |
7850 | string might need it (consider "\"$@\""), but we need some | |
7851 | way to signal that the final split on the first character | |
7852 | of $IFS should be done, even though QUOTED is 1. */ | |
0001803f | 7853 | /* XXX - should this test include Q_PATQUOTE? */ |
cce855bc JA |
7854 | if (quoted_dollar_at_p && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) |
7855 | *quoted_dollar_at_p = 1; | |
7856 | if (contains_dollar_at) | |
7857 | *contains_dollar_at = 1; | |
7858 | ||
7859 | /* We want to separate the positional parameters with the first | |
7860 | character of $IFS in case $IFS is something other than a space. | |
7861 | We also want to make sure that splitting is done no matter what -- | |
7862 | according to POSIX.2, this expands to a list of the positional | |
7863 | parameters no matter what IFS is set to. */ | |
3b34f6e6 CR |
7864 | /* XXX - what to do when in a context where word splitting is not |
7865 | performed? Even when IFS is not the default, posix seems to imply | |
7866 | that we behave like unquoted $* ? Maybe we should use PF_NOSPLIT2 | |
7867 | here. */ | |
ac50fbac | 7868 | temp = string_list_dollar_at (list, (pflags & PF_ASSIGNRHS) ? (quoted|Q_DOUBLE_QUOTES) : quoted); |
cce855bc | 7869 | |
ac50fbac | 7870 | tflag |= W_DOLLARAT; |
cce855bc JA |
7871 | dispose_words (list); |
7872 | break; | |
7873 | ||
7874 | case LBRACE: | |
0001803f | 7875 | tdesc = parameter_brace_expand (string, &zindex, quoted, pflags, |
95732b49 JA |
7876 | quoted_dollar_at_p, |
7877 | contains_dollar_at); | |
7878 | ||
95732b49 JA |
7879 | if (tdesc == &expand_wdesc_error || tdesc == &expand_wdesc_fatal) |
7880 | return (tdesc); | |
7881 | temp = tdesc ? tdesc->word : (char *)0; | |
cce855bc JA |
7882 | |
7883 | /* XXX */ | |
bb70624e | 7884 | /* Quoted nulls should be removed if there is anything else |
cce855bc JA |
7885 | in the string. */ |
7886 | /* Note that we saw the quoted null so we can add one back at | |
7887 | the end of this function if there are no other characters | |
28ef6c31 JA |
7888 | in the string, discard TEMP, and go on. The exception to |
7889 | this is when we have "${@}" and $1 is '', since $@ needs | |
7890 | special handling. */ | |
95732b49 | 7891 | if (tdesc && tdesc->word && (tdesc->flags & W_HASQUOTEDNULL) && QUOTED_NULL (temp)) |
cce855bc JA |
7892 | { |
7893 | if (had_quoted_null_p) | |
7894 | *had_quoted_null_p = 1; | |
28ef6c31 JA |
7895 | if (*quoted_dollar_at_p == 0) |
7896 | { | |
7897 | free (temp); | |
95732b49 | 7898 | tdesc->word = temp = (char *)NULL; |
28ef6c31 JA |
7899 | } |
7900 | ||
cce855bc JA |
7901 | } |
7902 | ||
95732b49 | 7903 | ret = tdesc; |
cce855bc JA |
7904 | goto return0; |
7905 | ||
7906 | /* Do command or arithmetic substitution. */ | |
7907 | case LPAREN: | |
7908 | /* We have to extract the contents of this paren substitution. */ | |
7909 | t_index = zindex + 1; | |
3185942a | 7910 | temp = extract_command_subst (string, &t_index, 0); |
cce855bc JA |
7911 | zindex = t_index; |
7912 | ||
7913 | /* For Posix.2-style `$(( ))' arithmetic substitution, | |
28ef6c31 | 7914 | extract the expression and pass it to the evaluator. */ |
cce855bc JA |
7915 | if (temp && *temp == LPAREN) |
7916 | { | |
7917 | char *temp2; | |
7918 | temp1 = temp + 1; | |
7919 | temp2 = savestring (temp1); | |
7920 | t_index = strlen (temp2) - 1; | |
7921 | ||
7922 | if (temp2[t_index] != RPAREN) | |
7923 | { | |
7924 | free (temp2); | |
7925 | goto comsub; | |
7926 | } | |
7927 | ||
7928 | /* Cut off ending `)' */ | |
7929 | temp2[t_index] = '\0'; | |
7930 | ||
0628567a JA |
7931 | if (chk_arithsub (temp2, t_index) == 0) |
7932 | { | |
7933 | free (temp2); | |
0001803f CR |
7934 | #if 0 |
7935 | internal_warning (_("future versions of the shell will force evaluation as an arithmetic substitution")); | |
7936 | #endif | |
0628567a JA |
7937 | goto comsub; |
7938 | } | |
7939 | ||
cce855bc | 7940 | /* Expand variables found inside the expression. */ |
0628567a | 7941 | temp1 = expand_arith_string (temp2, Q_DOUBLE_QUOTES); |
cce855bc JA |
7942 | free (temp2); |
7943 | ||
7944 | arithsub: | |
7945 | /* No error messages. */ | |
7946 | this_command_name = (char *)NULL; | |
7947 | number = evalexp (temp1, &expok); | |
7948 | free (temp); | |
7949 | free (temp1); | |
7950 | if (expok == 0) | |
7951 | { | |
7952 | if (interactive_shell == 0 && posixly_correct) | |
7953 | { | |
7954 | last_command_exit_value = EXECUTION_FAILURE; | |
95732b49 | 7955 | return (&expand_wdesc_fatal); |
cce855bc JA |
7956 | } |
7957 | else | |
95732b49 | 7958 | return (&expand_wdesc_error); |
cce855bc JA |
7959 | } |
7960 | temp = itos (number); | |
7961 | break; | |
7962 | } | |
7963 | ||
7964 | comsub: | |
b80f6443 JA |
7965 | if (pflags & PF_NOCOMSUB) |
7966 | /* we need zindex+1 because string[zindex] == RPAREN */ | |
7967 | temp1 = substring (string, *sindex, zindex+1); | |
7968 | else | |
3185942a JA |
7969 | { |
7970 | tdesc = command_substitute (temp, quoted); | |
7971 | temp1 = tdesc ? tdesc->word : (char *)NULL; | |
7972 | if (tdesc) | |
7973 | dispose_word_desc (tdesc); | |
7974 | } | |
cce855bc JA |
7975 | FREE (temp); |
7976 | temp = temp1; | |
7977 | break; | |
7978 | ||
7979 | /* Do POSIX.2d9-style arithmetic substitution. This will probably go | |
7980 | away in a future bash release. */ | |
7981 | case '[': | |
bb70624e | 7982 | /* Extract the contents of this arithmetic substitution. */ |
cce855bc JA |
7983 | t_index = zindex + 1; |
7984 | temp = extract_arithmetic_subst (string, &t_index); | |
7985 | zindex = t_index; | |
3185942a JA |
7986 | if (temp == 0) |
7987 | { | |
7988 | temp = savestring (string); | |
7989 | if (expanded_something) | |
7990 | *expanded_something = 0; | |
7991 | goto return0; | |
7992 | } | |
cce855bc JA |
7993 | |
7994 | /* Do initial variable expansion. */ | |
0628567a | 7995 | temp1 = expand_arith_string (temp, Q_DOUBLE_QUOTES); |
cce855bc JA |
7996 | |
7997 | goto arithsub; | |
7998 | ||
7999 | default: | |
8000 | /* Find the variable in VARIABLE_LIST. */ | |
8001 | temp = (char *)NULL; | |
8002 | ||
8003 | for (t_index = zindex; (c = string[zindex]) && legal_variable_char (c); zindex++) | |
8004 | ; | |
8005 | temp1 = (zindex > t_index) ? substring (string, t_index, zindex) : (char *)NULL; | |
8006 | ||
8007 | /* If this isn't a variable name, then just output the `$'. */ | |
8008 | if (temp1 == 0 || *temp1 == '\0') | |
8009 | { | |
8010 | FREE (temp1); | |
f73dda09 | 8011 | temp = (char *)xmalloc (2); |
cce855bc JA |
8012 | temp[0] = '$'; |
8013 | temp[1] = '\0'; | |
8014 | if (expanded_something) | |
8015 | *expanded_something = 0; | |
8016 | goto return0; | |
8017 | } | |
8018 | ||
8019 | /* If the variable exists, return its value cell. */ | |
8020 | var = find_variable (temp1); | |
8021 | ||
7117c2d2 | 8022 | if (var && invisible_p (var) == 0 && var_isset (var)) |
cce855bc JA |
8023 | { |
8024 | #if defined (ARRAY_VARS) | |
3185942a | 8025 | if (assoc_p (var) || array_p (var)) |
cce855bc | 8026 | { |
3185942a JA |
8027 | temp = array_p (var) ? array_reference (array_cell (var), 0) |
8028 | : assoc_reference (assoc_cell (var), "0"); | |
cce855bc | 8029 | if (temp) |
b80f6443 JA |
8030 | temp = (*temp && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) |
8031 | ? quote_string (temp) | |
8032 | : quote_escapes (temp); | |
8033 | else if (unbound_vars_is_error) | |
8034 | goto unbound_variable; | |
cce855bc JA |
8035 | } |
8036 | else | |
8037 | #endif | |
b80f6443 JA |
8038 | { |
8039 | temp = value_cell (var); | |
8040 | ||
8041 | temp = (*temp && (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES))) | |
8042 | ? quote_string (temp) | |
8043 | : quote_escapes (temp); | |
8044 | } | |
8045 | ||
cce855bc | 8046 | free (temp1); |
7117c2d2 | 8047 | |
cce855bc JA |
8048 | goto return0; |
8049 | } | |
b64a0e1d CR |
8050 | else if (var && (invisible_p (var) || var_isset (var) == 0)) |
8051 | temp = (char *)NULL; | |
8052 | else if ((var = find_variable_last_nameref (temp1)) && var_isset (var) && invisible_p (var) == 0) | |
ac50fbac CR |
8053 | { |
8054 | temp = nameref_cell (var); | |
8055 | #if defined (ARRAY_VARS) | |
8056 | if (temp && *temp && valid_array_reference (temp)) | |
8057 | { | |
8058 | tdesc = parameter_brace_expand_word (temp, SPECIAL_VAR (temp, 0), quoted, pflags, (arrayind_t *)NULL); | |
8059 | if (tdesc == &expand_wdesc_error || tdesc == &expand_wdesc_fatal) | |
8060 | return (tdesc); | |
8061 | ret = tdesc; | |
8062 | goto return0; | |
8063 | } | |
8064 | else | |
8065 | #endif | |
8066 | /* y=2 ; typeset -n x=y; echo $x is not the same as echo $2 in ksh */ | |
8067 | if (temp && *temp && legal_identifier (temp) == 0) | |
8068 | { | |
8069 | last_command_exit_value = EXECUTION_FAILURE; | |
8070 | report_error (_("%s: invalid variable name for name reference"), temp); | |
8071 | return (&expand_wdesc_error); /* XXX */ | |
8072 | } | |
8073 | else | |
8074 | temp = (char *)NULL; | |
8075 | } | |
cce855bc JA |
8076 | |
8077 | temp = (char *)NULL; | |
8078 | ||
b80f6443 | 8079 | unbound_variable: |
cce855bc | 8080 | if (unbound_vars_is_error) |
0001803f CR |
8081 | { |
8082 | last_command_exit_value = EXECUTION_FAILURE; | |
8083 | err_unboundvar (temp1); | |
8084 | } | |
cce855bc JA |
8085 | else |
8086 | { | |
8087 | free (temp1); | |
8088 | goto return0; | |
8089 | } | |
8090 | ||
8091 | free (temp1); | |
8092 | last_command_exit_value = EXECUTION_FAILURE; | |
8093 | return ((unbound_vars_is_error && interactive_shell == 0) | |
95732b49 JA |
8094 | ? &expand_wdesc_fatal |
8095 | : &expand_wdesc_error); | |
cce855bc JA |
8096 | } |
8097 | ||
8098 | if (string[zindex]) | |
8099 | zindex++; | |
8100 | ||
8101 | return0: | |
8102 | *sindex = zindex; | |
95732b49 JA |
8103 | |
8104 | if (ret == 0) | |
8105 | { | |
8106 | ret = alloc_word_desc (); | |
8107 | ret->flags = tflag; /* XXX */ | |
8108 | ret->word = temp; | |
8109 | } | |
8110 | return ret; | |
cce855bc JA |
8111 | } |
8112 | ||
8113 | /* Make a word list which is the result of parameter and variable | |
8114 | expansion, command substitution, arithmetic substitution, and | |
8115 | quote removal of WORD. Return a pointer to a WORD_LIST which is | |
8116 | the result of the expansion. If WORD contains a null word, the | |
8117 | word list returned is also null. | |
726f6388 | 8118 | |
ccc6cda3 JA |
8119 | QUOTED contains flag values defined in shell.h. |
8120 | ||
b72432fd JA |
8121 | ISEXP is used to tell expand_word_internal that the word should be |
8122 | treated as the result of an expansion. This has implications for | |
8123 | how IFS characters in the word are treated. | |
8124 | ||
726f6388 JA |
8125 | CONTAINS_DOLLAR_AT and EXPANDED_SOMETHING are return values; when non-null |
8126 | they point to an integer value which receives information about expansion. | |
8127 | CONTAINS_DOLLAR_AT gets non-zero if WORD contained "$@", else zero. | |
8128 | EXPANDED_SOMETHING get non-zero if WORD contained any parameter expansions, | |
8129 | else zero. | |
8130 | ||
8131 | This only does word splitting in the case of $@ expansion. In that | |
8132 | case, we split on ' '. */ | |
8133 | ||
8134 | /* Values for the local variable quoted_state. */ | |
8135 | #define UNQUOTED 0 | |
8136 | #define PARTIALLY_QUOTED 1 | |
8137 | #define WHOLLY_QUOTED 2 | |
8138 | ||
8139 | static WORD_LIST * | |
b72432fd | 8140 | expand_word_internal (word, quoted, isexp, contains_dollar_at, expanded_something) |
726f6388 | 8141 | WORD_DESC *word; |
b72432fd | 8142 | int quoted, isexp; |
726f6388 JA |
8143 | int *contains_dollar_at; |
8144 | int *expanded_something; | |
8145 | { | |
ccc6cda3 JA |
8146 | WORD_LIST *list; |
8147 | WORD_DESC *tword; | |
726f6388 JA |
8148 | |
8149 | /* The intermediate string that we build while expanding. */ | |
ccc6cda3 | 8150 | char *istring; |
726f6388 JA |
8151 | |
8152 | /* The current size of the above object. */ | |
ccc6cda3 | 8153 | int istring_size; |
726f6388 JA |
8154 | |
8155 | /* Index into ISTRING. */ | |
ccc6cda3 | 8156 | int istring_index; |
726f6388 JA |
8157 | |
8158 | /* Temporary string storage. */ | |
ccc6cda3 | 8159 | char *temp, *temp1; |
726f6388 JA |
8160 | |
8161 | /* The text of WORD. */ | |
ccc6cda3 | 8162 | register char *string; |
726f6388 | 8163 | |
7117c2d2 JA |
8164 | /* The size of STRING. */ |
8165 | size_t string_size; | |
8166 | ||
726f6388 | 8167 | /* The index into STRING. */ |
ccc6cda3 | 8168 | int sindex; |
726f6388 JA |
8169 | |
8170 | /* This gets 1 if we see a $@ while quoted. */ | |
ccc6cda3 | 8171 | int quoted_dollar_at; |
726f6388 JA |
8172 | |
8173 | /* One of UNQUOTED, PARTIALLY_QUOTED, or WHOLLY_QUOTED, depending on | |
8174 | whether WORD contains no quoting characters, a partially quoted | |
8175 | string (e.g., "xx"ab), or is fully quoted (e.g., "xxab"). */ | |
ccc6cda3 JA |
8176 | int quoted_state; |
8177 | ||
95732b49 | 8178 | /* State flags */ |
ccc6cda3 | 8179 | int had_quoted_null; |
0b913689 | 8180 | int has_dollar_at, temp_has_dollar_at; |
ac50fbac | 8181 | int split_on_spaces; |
28ef6c31 | 8182 | int tflag; |
0001803f | 8183 | int pflags; /* flags passed to param_expand */ |
726f6388 | 8184 | |
95732b49 JA |
8185 | int assignoff; /* If assignment, offset of `=' */ |
8186 | ||
f73dda09 | 8187 | register unsigned char c; /* Current character. */ |
726f6388 | 8188 | int t_index; /* For calls to string_extract_xxx. */ |
726f6388 | 8189 | |
bb70624e | 8190 | char twochars[2]; |
b72432fd | 8191 | |
7117c2d2 JA |
8192 | DECLARE_MBSTATE; |
8193 | ||
f73dda09 | 8194 | istring = (char *)xmalloc (istring_size = DEFAULT_INITIAL_ARRAY_SIZE); |
ccc6cda3 | 8195 | istring[istring_index = 0] = '\0'; |
cce855bc | 8196 | quoted_dollar_at = had_quoted_null = has_dollar_at = 0; |
ac50fbac | 8197 | split_on_spaces = 0; |
ccc6cda3 JA |
8198 | quoted_state = UNQUOTED; |
8199 | ||
8200 | string = word->word; | |
8201 | if (string == 0) | |
8202 | goto finished_with_string; | |
95732b49 JA |
8203 | /* Don't need the string length for the SADD... and COPY_ macros unless |
8204 | multibyte characters are possible. */ | |
8205 | string_size = (MB_CUR_MAX > 1) ? strlen (string) : 1; | |
726f6388 JA |
8206 | |
8207 | if (contains_dollar_at) | |
8208 | *contains_dollar_at = 0; | |
8209 | ||
95732b49 JA |
8210 | assignoff = -1; |
8211 | ||
726f6388 JA |
8212 | /* Begin the expansion. */ |
8213 | ||
ccc6cda3 | 8214 | for (sindex = 0; ;) |
726f6388 JA |
8215 | { |
8216 | c = string[sindex]; | |
8217 | ||
ac50fbac | 8218 | /* Case on top-level character. */ |
726f6388 JA |
8219 | switch (c) |
8220 | { | |
8221 | case '\0': | |
8222 | goto finished_with_string; | |
8223 | ||
8224 | case CTLESC: | |
7117c2d2 JA |
8225 | sindex++; |
8226 | #if HANDLE_MULTIBYTE | |
8227 | if (MB_CUR_MAX > 1 && string[sindex]) | |
8228 | { | |
b80f6443 | 8229 | SADD_MBQCHAR_BODY(temp, string, sindex, string_size); |
7117c2d2 JA |
8230 | } |
8231 | else | |
8232 | #endif | |
8233 | { | |
8234 | temp = (char *)xmalloc (3); | |
8235 | temp[0] = CTLESC; | |
8236 | temp[1] = c = string[sindex]; | |
8237 | temp[2] = '\0'; | |
8238 | } | |
726f6388 | 8239 | |
cce855bc | 8240 | dollar_add_string: |
726f6388 JA |
8241 | if (string[sindex]) |
8242 | sindex++; | |
8243 | ||
cce855bc JA |
8244 | add_string: |
8245 | if (temp) | |
8246 | { | |
8247 | istring = sub_append_string (temp, istring, &istring_index, &istring_size); | |
8248 | temp = (char *)0; | |
8249 | } | |
8250 | ||
8251 | break; | |
726f6388 JA |
8252 | |
8253 | #if defined (PROCESS_SUBSTITUTION) | |
8254 | /* Process substitution. */ | |
8255 | case '<': | |
8256 | case '>': | |
8257 | { | |
0628567a | 8258 | if (string[++sindex] != LPAREN || (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) || (word->flags & (W_DQUOTE|W_NOPROCSUB)) || posixly_correct) |
726f6388 | 8259 | { |
bb70624e | 8260 | sindex--; /* add_character: label increments sindex */ |
726f6388 JA |
8261 | goto add_character; |
8262 | } | |
8263 | else | |
cce855bc | 8264 | t_index = sindex + 1; /* skip past both '<' and LPAREN */ |
726f6388 | 8265 | |
85b94814 | 8266 | temp1 = extract_process_subst (string, (c == '<') ? "<(" : ">(", &t_index, 0); /*))*/ |
ccc6cda3 | 8267 | sindex = t_index; |
726f6388 JA |
8268 | |
8269 | /* If the process substitution specification is `<()', we want to | |
8270 | open the pipe for writing in the child and produce output; if | |
8271 | it is `>()', we want to open the pipe for reading in the child | |
8272 | and consume input. */ | |
ccc6cda3 | 8273 | temp = temp1 ? process_substitute (temp1, (c == '>')) : (char *)0; |
726f6388 JA |
8274 | |
8275 | FREE (temp1); | |
8276 | ||
8277 | goto dollar_add_string; | |
8278 | } | |
8279 | #endif /* PROCESS_SUBSTITUTION */ | |
8280 | ||
95732b49 JA |
8281 | case '=': |
8282 | /* Posix.2 section 3.6.1 says that tildes following `=' in words | |
8283 | which are not assignment statements are not expanded. If the | |
8284 | shell isn't in posix mode, though, we perform tilde expansion | |
8285 | on `likely candidate' unquoted assignment statements (flags | |
8286 | include W_ASSIGNMENT but not W_QUOTED). A likely candidate | |
8287 | contains an unquoted :~ or =~. Something to think about: we | |
8288 | now have a flag that says to perform tilde expansion on arguments | |
8289 | to `assignment builtins' like declare and export that look like | |
8290 | assignment statements. We now do tilde expansion on such words | |
8291 | even in POSIX mode. */ | |
8292 | if (word->flags & (W_ASSIGNRHS|W_NOTILDE)) | |
17345e5a | 8293 | { |
0001803f | 8294 | if (isexp == 0 && (word->flags & (W_NOSPLIT|W_NOSPLIT2)) == 0 && isifs (c)) |
17345e5a JA |
8295 | goto add_ifs_character; |
8296 | else | |
8297 | goto add_character; | |
8298 | } | |
95732b49 JA |
8299 | /* If we're not in posix mode or forcing assignment-statement tilde |
8300 | expansion, note where the `=' appears in the word and prepare to | |
8301 | do tilde expansion following the first `='. */ | |
8302 | if ((word->flags & W_ASSIGNMENT) && | |
8303 | (posixly_correct == 0 || (word->flags & W_TILDEEXP)) && | |
8304 | assignoff == -1 && sindex > 0) | |
8305 | assignoff = sindex; | |
8306 | if (sindex == assignoff && string[sindex+1] == '~') /* XXX */ | |
8307 | word->flags |= W_ITILDE; | |
8308 | #if 0 | |
8309 | else if ((word->flags & W_ASSIGNMENT) && | |
8310 | (posixly_correct == 0 || (word->flags & W_TILDEEXP)) && | |
8311 | string[sindex+1] == '~') | |
8312 | word->flags |= W_ITILDE; | |
8313 | #endif | |
0001803f | 8314 | if (isexp == 0 && (word->flags & (W_NOSPLIT|W_NOSPLIT2)) == 0 && isifs (c)) |
17345e5a JA |
8315 | goto add_ifs_character; |
8316 | else | |
8317 | goto add_character; | |
95732b49 JA |
8318 | |
8319 | case ':': | |
8320 | if (word->flags & W_NOTILDE) | |
17345e5a | 8321 | { |
0001803f | 8322 | if (isexp == 0 && (word->flags & (W_NOSPLIT|W_NOSPLIT2)) == 0 && isifs (c)) |
17345e5a JA |
8323 | goto add_ifs_character; |
8324 | else | |
8325 | goto add_character; | |
8326 | } | |
95732b49 JA |
8327 | |
8328 | if ((word->flags & (W_ASSIGNMENT|W_ASSIGNRHS|W_TILDEEXP)) && | |
8329 | string[sindex+1] == '~') | |
8330 | word->flags |= W_ITILDE; | |
17345e5a | 8331 | |
0001803f | 8332 | if (isexp == 0 && (word->flags & (W_NOSPLIT|W_NOSPLIT2)) == 0 && isifs (c)) |
17345e5a JA |
8333 | goto add_ifs_character; |
8334 | else | |
8335 | goto add_character; | |
95732b49 JA |
8336 | |
8337 | case '~': | |
8338 | /* If the word isn't supposed to be tilde expanded, or we're not | |
8339 | at the start of a word or after an unquoted : or = in an | |
8340 | assignment statement, we don't do tilde expansion. */ | |
8341 | if ((word->flags & (W_NOTILDE|W_DQUOTE)) || | |
8342 | (sindex > 0 && ((word->flags & W_ITILDE) == 0)) || | |
8343 | (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))) | |
8344 | { | |
8345 | word->flags &= ~W_ITILDE; | |
0001803f | 8346 | if (isexp == 0 && (word->flags & (W_NOSPLIT|W_NOSPLIT2)) == 0 && isifs (c) && (quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) == 0) |
17345e5a JA |
8347 | goto add_ifs_character; |
8348 | else | |
8349 | goto add_character; | |
95732b49 JA |
8350 | } |
8351 | ||
8352 | if (word->flags & W_ASSIGNRHS) | |
8353 | tflag = 2; | |
8354 | else if (word->flags & (W_ASSIGNMENT|W_TILDEEXP)) | |
8355 | tflag = 1; | |
8356 | else | |
8357 | tflag = 0; | |
8358 | ||
8359 | temp = bash_tilde_find_word (string + sindex, tflag, &t_index); | |
8360 | ||
8361 | word->flags &= ~W_ITILDE; | |
8362 | ||
8363 | if (temp && *temp && t_index > 0) | |
8364 | { | |
8365 | temp1 = bash_tilde_expand (temp, tflag); | |
0628567a JA |
8366 | if (temp1 && *temp1 == '~' && STREQ (temp, temp1)) |
8367 | { | |
8368 | FREE (temp); | |
8369 | FREE (temp1); | |
8370 | goto add_character; /* tilde expansion failed */ | |
8371 | } | |
95732b49 JA |
8372 | free (temp); |
8373 | temp = temp1; | |
8374 | sindex += t_index; | |
3185942a | 8375 | goto add_quoted_string; /* XXX was add_string */ |
95732b49 JA |
8376 | } |
8377 | else | |
8378 | { | |
8379 | FREE (temp); | |
8380 | goto add_character; | |
8381 | } | |
8382 | ||
726f6388 | 8383 | case '$': |
726f6388 JA |
8384 | if (expanded_something) |
8385 | *expanded_something = 1; | |
8386 | ||
0b913689 | 8387 | temp_has_dollar_at = 0; |
0001803f CR |
8388 | pflags = (word->flags & W_NOCOMSUB) ? PF_NOCOMSUB : 0; |
8389 | if (word->flags & W_NOSPLIT2) | |
8390 | pflags |= PF_NOSPLIT2; | |
ac50fbac CR |
8391 | if (word->flags & W_ASSIGNRHS) |
8392 | pflags |= PF_ASSIGNRHS; | |
95732b49 | 8393 | tword = param_expand (string, &sindex, quoted, expanded_something, |
0b913689 | 8394 | &temp_has_dollar_at, "ed_dollar_at, |
0001803f | 8395 | &had_quoted_null, pflags); |
0b913689 | 8396 | has_dollar_at += temp_has_dollar_at; |
ac50fbac | 8397 | split_on_spaces += (tword->flags & W_SPLITSPACE); |
726f6388 | 8398 | |
95732b49 | 8399 | if (tword == &expand_wdesc_error || tword == &expand_wdesc_fatal) |
726f6388 | 8400 | { |
cce855bc JA |
8401 | free (string); |
8402 | free (istring); | |
95732b49 JA |
8403 | return ((tword == &expand_wdesc_error) ? &expand_word_error |
8404 | : &expand_word_fatal); | |
cce855bc JA |
8405 | } |
8406 | if (contains_dollar_at && has_dollar_at) | |
8407 | *contains_dollar_at = 1; | |
95732b49 JA |
8408 | |
8409 | if (tword && (tword->flags & W_HASQUOTEDNULL)) | |
8410 | had_quoted_null = 1; | |
8411 | ||
ac50fbac | 8412 | temp = tword ? tword->word : (char *)NULL; |
95732b49 JA |
8413 | dispose_word_desc (tword); |
8414 | ||
a601c749 CR |
8415 | /* Kill quoted nulls; we will add them back at the end of |
8416 | expand_word_internal if nothing else in the string */ | |
8417 | if (had_quoted_null && temp && QUOTED_NULL (temp)) | |
8418 | { | |
8419 | FREE (temp); | |
8420 | temp = (char *)NULL; | |
8421 | } | |
8422 | ||
cce855bc JA |
8423 | goto add_string; |
8424 | break; | |
726f6388 | 8425 | |
cce855bc JA |
8426 | case '`': /* Backquoted command substitution. */ |
8427 | { | |
b80f6443 | 8428 | t_index = sindex++; |
726f6388 | 8429 | |
3185942a | 8430 | temp = string_extract (string, &sindex, "`", SX_REQMATCH); |
95732b49 JA |
8431 | /* The test of sindex against t_index is to allow bare instances of |
8432 | ` to pass through, for backwards compatibility. */ | |
8433 | if (temp == &extract_string_error || temp == &extract_string_fatal) | |
8434 | { | |
8435 | if (sindex - 1 == t_index) | |
8436 | { | |
8437 | sindex = t_index; | |
8438 | goto add_character; | |
8439 | } | |
ac50fbac | 8440 | last_command_exit_value = EXECUTION_FAILURE; |
3185942a | 8441 | report_error (_("bad substitution: no closing \"`\" in %s") , string+t_index); |
95732b49 JA |
8442 | free (string); |
8443 | free (istring); | |
8444 | return ((temp == &extract_string_error) ? &expand_word_error | |
8445 | : &expand_word_fatal); | |
8446 | } | |
8447 | ||
cce855bc JA |
8448 | if (expanded_something) |
8449 | *expanded_something = 1; | |
726f6388 | 8450 | |
b80f6443 JA |
8451 | if (word->flags & W_NOCOMSUB) |
8452 | /* sindex + 1 because string[sindex] == '`' */ | |
8453 | temp1 = substring (string, t_index, sindex + 1); | |
8454 | else | |
8455 | { | |
8456 | de_backslash (temp); | |
3185942a JA |
8457 | tword = command_substitute (temp, quoted); |
8458 | temp1 = tword ? tword->word : (char *)NULL; | |
8459 | if (tword) | |
8460 | dispose_word_desc (tword); | |
b80f6443 | 8461 | } |
cce855bc JA |
8462 | FREE (temp); |
8463 | temp = temp1; | |
8464 | goto dollar_add_string; | |
8465 | } | |
ccc6cda3 | 8466 | |
cce855bc JA |
8467 | case '\\': |
8468 | if (string[sindex + 1] == '\n') | |
8469 | { | |
8470 | sindex += 2; | |
8471 | continue; | |
8472 | } | |
726f6388 | 8473 | |
cce855bc | 8474 | c = string[++sindex]; |
726f6388 | 8475 | |
cce855bc | 8476 | if (quoted & Q_HERE_DOCUMENT) |
28ef6c31 | 8477 | tflag = CBSHDOC; |
cce855bc | 8478 | else if (quoted & Q_DOUBLE_QUOTES) |
28ef6c31 | 8479 | tflag = CBSDQUOTE; |
cce855bc | 8480 | else |
28ef6c31 JA |
8481 | tflag = 0; |
8482 | ||
495aee44 CR |
8483 | /* From Posix discussion on austin-group list: Backslash escaping |
8484 | a } in ${...} is removed. Issue 0000221 */ | |
8485 | if ((quoted & Q_DOLBRACE) && c == RBRACE) | |
8486 | { | |
ac50fbac CR |
8487 | SCOPY_CHAR_I (twochars, CTLESC, c, string, sindex, string_size); |
8488 | } | |
8489 | /* This is the fix for " $@\ " */ | |
8490 | else if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && ((sh_syntaxtab[c] & tflag) == 0) && isexp == 0 && isifs (c)) | |
8491 | { | |
8492 | RESIZE_MALLOCED_BUFFER (istring, istring_index, 2, istring_size, | |
8493 | DEFAULT_ARRAY_SIZE); | |
8494 | istring[istring_index++] = CTLESC; | |
8495 | istring[istring_index++] = '\\'; | |
8496 | istring[istring_index] = '\0'; | |
8497 | ||
495aee44 CR |
8498 | SCOPY_CHAR_I (twochars, CTLESC, c, string, sindex, string_size); |
8499 | } | |
8500 | else if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) && ((sh_syntaxtab[c] & tflag) == 0)) | |
cce855bc | 8501 | { |
7117c2d2 | 8502 | SCOPY_CHAR_I (twochars, '\\', c, string, sindex, string_size); |
bb70624e JA |
8503 | } |
8504 | else if (c == 0) | |
8505 | { | |
8506 | c = CTLNUL; | |
8507 | sindex--; /* add_character: label increments sindex */ | |
8508 | goto add_character; | |
cce855bc JA |
8509 | } |
8510 | else | |
bb70624e | 8511 | { |
7117c2d2 | 8512 | SCOPY_CHAR_I (twochars, CTLESC, c, string, sindex, string_size); |
bb70624e | 8513 | } |
726f6388 | 8514 | |
bb70624e JA |
8515 | sindex++; |
8516 | add_twochars: | |
8517 | /* BEFORE jumping here, we need to increment sindex if appropriate */ | |
8518 | RESIZE_MALLOCED_BUFFER (istring, istring_index, 2, istring_size, | |
8519 | DEFAULT_ARRAY_SIZE); | |
8520 | istring[istring_index++] = twochars[0]; | |
8521 | istring[istring_index++] = twochars[1]; | |
8522 | istring[istring_index] = '\0'; | |
8523 | ||
8524 | break; | |
726f6388 | 8525 | |
cce855bc | 8526 | case '"': |
95732b49 | 8527 | if ((quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))) |
cce855bc | 8528 | goto add_character; |
ccc6cda3 JA |
8529 | |
8530 | t_index = ++sindex; | |
8531 | temp = string_extract_double_quoted (string, &sindex, 0); | |
8532 | ||
8533 | /* If the quotes surrounded the entire string, then the | |
8534 | whole word was quoted. */ | |
8535 | quoted_state = (t_index == 1 && string[sindex] == '\0') | |
8536 | ? WHOLLY_QUOTED | |
7117c2d2 | 8537 | : PARTIALLY_QUOTED; |
ccc6cda3 JA |
8538 | |
8539 | if (temp && *temp) | |
726f6388 | 8540 | { |
95732b49 JA |
8541 | tword = alloc_word_desc (); |
8542 | tword->word = temp; | |
8543 | ||
ccc6cda3 JA |
8544 | temp = (char *)NULL; |
8545 | ||
0b913689 | 8546 | temp_has_dollar_at = 0; /* XXX */ |
95732b49 | 8547 | /* Need to get W_HASQUOTEDNULL flag through this function. */ |
0b913689 CR |
8548 | list = expand_word_internal (tword, Q_DOUBLE_QUOTES, 0, &temp_has_dollar_at, (int *)NULL); |
8549 | has_dollar_at += temp_has_dollar_at; | |
726f6388 | 8550 | |
ccc6cda3 JA |
8551 | if (list == &expand_word_error || list == &expand_word_fatal) |
8552 | { | |
8553 | free (istring); | |
8554 | free (string); | |
8555 | /* expand_word_internal has already freed temp_word->word | |
8556 | for us because of the way it prints error messages. */ | |
8557 | tword->word = (char *)NULL; | |
8558 | dispose_word (tword); | |
8559 | return list; | |
8560 | } | |
726f6388 | 8561 | |
ccc6cda3 | 8562 | dispose_word (tword); |
726f6388 | 8563 | |
ccc6cda3 JA |
8564 | /* "$@" (a double-quoted dollar-at) expands into nothing, |
8565 | not even a NULL word, when there are no positional | |
8566 | parameters. */ | |
cce855bc | 8567 | if (list == 0 && has_dollar_at) |
726f6388 | 8568 | { |
ccc6cda3 JA |
8569 | quoted_dollar_at++; |
8570 | break; | |
8571 | } | |
8572 | ||
8573 | /* If we get "$@", we know we have expanded something, so we | |
8574 | need to remember it for the final split on $IFS. This is | |
8575 | a special case; it's the only case where a quoted string | |
8576 | can expand into more than one word. It's going to come back | |
8577 | from the above call to expand_word_internal as a list with | |
8578 | a single word, in which all characters are quoted and | |
8579 | separated by blanks. What we want to do is to turn it back | |
8580 | into a list for the next piece of code. */ | |
8581 | if (list) | |
8582 | dequote_list (list); | |
8583 | ||
95732b49 | 8584 | if (list && list->word && (list->word->flags & W_HASQUOTEDNULL)) |
ac50fbac | 8585 | had_quoted_null = 1; /* XXX */ |
95732b49 | 8586 | |
cce855bc | 8587 | if (has_dollar_at) |
ccc6cda3 JA |
8588 | { |
8589 | quoted_dollar_at++; | |
8590 | if (contains_dollar_at) | |
8591 | *contains_dollar_at = 1; | |
8592 | if (expanded_something) | |
8593 | *expanded_something = 1; | |
8594 | } | |
8595 | } | |
8596 | else | |
8597 | { | |
8598 | /* What we have is "". This is a minor optimization. */ | |
f73dda09 | 8599 | FREE (temp); |
ccc6cda3 JA |
8600 | list = (WORD_LIST *)NULL; |
8601 | } | |
8602 | ||
8603 | /* The code above *might* return a list (consider the case of "$@", | |
8604 | where it returns "$1", "$2", etc.). We can't throw away the | |
8605 | rest of the list, and we have to make sure each word gets added | |
8606 | as quoted. We test on tresult->next: if it is non-NULL, we | |
8607 | quote the whole list, save it to a string with string_list, and | |
8608 | add that string. We don't need to quote the results of this | |
8609 | (and it would be wrong, since that would quote the separators | |
8610 | as well), so we go directly to add_string. */ | |
8611 | if (list) | |
8612 | { | |
8613 | if (list->next) | |
8614 | { | |
bc4cd23c JA |
8615 | /* Testing quoted_dollar_at makes sure that "$@" is |
8616 | split correctly when $IFS does not contain a space. */ | |
8617 | temp = quoted_dollar_at | |
8618 | ? string_list_dollar_at (list, Q_DOUBLE_QUOTES) | |
8619 | : string_list (quote_list (list)); | |
ccc6cda3 | 8620 | dispose_words (list); |
726f6388 JA |
8621 | goto add_string; |
8622 | } | |
8623 | else | |
8624 | { | |
ccc6cda3 | 8625 | temp = savestring (list->word->word); |
95732b49 | 8626 | tflag = list->word->flags; |
ccc6cda3 | 8627 | dispose_words (list); |
95732b49 | 8628 | |
cce855bc JA |
8629 | /* If the string is not a quoted null string, we want |
8630 | to remove any embedded unquoted CTLNUL characters. | |
8631 | We do not want to turn quoted null strings back into | |
8632 | the empty string, though. We do this because we | |
8633 | want to remove any quoted nulls from expansions that | |
8634 | contain other characters. For example, if we have | |
8635 | x"$*"y or "x$*y" and there are no positional parameters, | |
7117c2d2 | 8636 | the $* should expand into nothing. */ |
95732b49 JA |
8637 | /* We use the W_HASQUOTEDNULL flag to differentiate the |
8638 | cases: a quoted null character as above and when | |
8639 | CTLNUL is contained in the (non-null) expansion | |
8640 | of some variable. We use the had_quoted_null flag to | |
8641 | pass the value through this function to its caller. */ | |
8642 | if ((tflag & W_HASQUOTEDNULL) && QUOTED_NULL (temp) == 0) | |
cce855bc | 8643 | remove_quoted_nulls (temp); /* XXX */ |
726f6388 JA |
8644 | } |
8645 | } | |
ccc6cda3 JA |
8646 | else |
8647 | temp = (char *)NULL; | |
726f6388 | 8648 | |
ccc6cda3 | 8649 | /* We do not want to add quoted nulls to strings that are only |
ac50fbac CR |
8650 | partially quoted; we can throw them away. The exception to |
8651 | this is when we are going to be performing word splitting, | |
8652 | since we have to preserve a null argument if the next character | |
8653 | will cause word splitting. */ | |
495aee44 | 8654 | if (temp == 0 && quoted_state == PARTIALLY_QUOTED && (word->flags & (W_NOSPLIT|W_NOSPLIT2))) |
cce855bc | 8655 | continue; |
726f6388 | 8656 | |
ccc6cda3 | 8657 | add_quoted_string: |
726f6388 | 8658 | |
ccc6cda3 JA |
8659 | if (temp) |
8660 | { | |
8661 | temp1 = temp; | |
8662 | temp = quote_string (temp); | |
8663 | free (temp1); | |
bb70624e | 8664 | goto add_string; |
ccc6cda3 JA |
8665 | } |
8666 | else | |
8667 | { | |
8668 | /* Add NULL arg. */ | |
bb70624e JA |
8669 | c = CTLNUL; |
8670 | sindex--; /* add_character: label increments sindex */ | |
8671 | goto add_character; | |
ccc6cda3 | 8672 | } |
bb70624e | 8673 | |
ccc6cda3 | 8674 | /* break; */ |
726f6388 | 8675 | |
ccc6cda3 | 8676 | case '\'': |
95732b49 | 8677 | if ((quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT))) |
ccc6cda3 | 8678 | goto add_character; |
726f6388 | 8679 | |
ccc6cda3 JA |
8680 | t_index = ++sindex; |
8681 | temp = string_extract_single_quoted (string, &sindex); | |
726f6388 | 8682 | |
ccc6cda3 JA |
8683 | /* If the entire STRING was surrounded by single quotes, |
8684 | then the string is wholly quoted. */ | |
8685 | quoted_state = (t_index == 1 && string[sindex] == '\0') | |
8686 | ? WHOLLY_QUOTED | |
7117c2d2 | 8687 | : PARTIALLY_QUOTED; |
726f6388 | 8688 | |
ccc6cda3 JA |
8689 | /* If all we had was '', it is a null expansion. */ |
8690 | if (*temp == '\0') | |
8691 | { | |
8692 | free (temp); | |
8693 | temp = (char *)NULL; | |
8694 | } | |
8695 | else | |
7117c2d2 | 8696 | remove_quoted_escapes (temp); /* ??? */ |
726f6388 | 8697 | |
ccc6cda3 JA |
8698 | /* We do not want to add quoted nulls to strings that are only |
8699 | partially quoted; such nulls are discarded. */ | |
8700 | if (temp == 0 && (quoted_state == PARTIALLY_QUOTED)) | |
8701 | continue; | |
726f6388 | 8702 | |
bb70624e JA |
8703 | /* If we have a quoted null expansion, add a quoted NULL to istring. */ |
8704 | if (temp == 0) | |
8705 | { | |
8706 | c = CTLNUL; | |
8707 | sindex--; /* add_character: label increments sindex */ | |
8708 | goto add_character; | |
8709 | } | |
8710 | else | |
8711 | goto add_quoted_string; | |
8712 | ||
ccc6cda3 | 8713 | /* break; */ |
726f6388 JA |
8714 | |
8715 | default: | |
726f6388 | 8716 | /* This is the fix for " $@ " */ |
17345e5a | 8717 | add_ifs_character: |
7117c2d2 | 8718 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) || (isexp == 0 && isifs (c))) |
726f6388 | 8719 | { |
bb70624e JA |
8720 | if (string[sindex]) /* from old goto dollar_add_string */ |
8721 | sindex++; | |
8722 | if (c == 0) | |
8723 | { | |
8724 | c = CTLNUL; | |
8725 | goto add_character; | |
8726 | } | |
8727 | else | |
8728 | { | |
7117c2d2 | 8729 | #if HANDLE_MULTIBYTE |
b80f6443 JA |
8730 | if (MB_CUR_MAX > 1) |
8731 | sindex--; | |
8732 | ||
7117c2d2 JA |
8733 | if (MB_CUR_MAX > 1) |
8734 | { | |
b80f6443 | 8735 | SADD_MBQCHAR_BODY(temp, string, sindex, string_size); |
7117c2d2 JA |
8736 | } |
8737 | else | |
8738 | #endif | |
8739 | { | |
8740 | twochars[0] = CTLESC; | |
8741 | twochars[1] = c; | |
8742 | goto add_twochars; | |
8743 | } | |
bb70624e | 8744 | } |
726f6388 JA |
8745 | } |
8746 | ||
7117c2d2 JA |
8747 | SADD_MBCHAR (temp, string, sindex, string_size); |
8748 | ||
726f6388 | 8749 | add_character: |
ccc6cda3 JA |
8750 | RESIZE_MALLOCED_BUFFER (istring, istring_index, 1, istring_size, |
8751 | DEFAULT_ARRAY_SIZE); | |
726f6388 JA |
8752 | istring[istring_index++] = c; |
8753 | istring[istring_index] = '\0'; | |
8754 | ||
8755 | /* Next character. */ | |
8756 | sindex++; | |
8757 | } | |
8758 | } | |
8759 | ||
8760 | finished_with_string: | |
726f6388 JA |
8761 | /* OK, we're ready to return. If we have a quoted string, and |
8762 | quoted_dollar_at is not set, we do no splitting at all; otherwise | |
8763 | we split on ' '. The routines that call this will handle what to | |
8764 | do if nothing has been expanded. */ | |
ccc6cda3 JA |
8765 | |
8766 | /* Partially and wholly quoted strings which expand to the empty | |
8767 | string are retained as an empty arguments. Unquoted strings | |
8768 | which expand to the empty string are discarded. The single | |
8769 | exception is the case of expanding "$@" when there are no | |
8770 | positional parameters. In that case, we discard the expansion. */ | |
8771 | ||
8772 | /* Because of how the code that handles "" and '' in partially | |
8773 | quoted strings works, we need to make ISTRING into a QUOTED_NULL | |
8774 | if we saw quoting characters, but the expansion was empty. | |
8775 | "" and '' are tossed away before we get to this point when | |
8776 | processing partially quoted strings. This makes "" and $xxx"" | |
8777 | equivalent when xxx is unset. We also look to see whether we | |
8778 | saw a quoted null from a ${} expansion and add one back if we | |
8779 | need to. */ | |
8780 | ||
8781 | /* If we expand to nothing and there were no single or double quotes | |
8782 | in the word, we throw it away. Otherwise, we return a NULL word. | |
8783 | The single exception is for $@ surrounded by double quotes when | |
8784 | there are no positional parameters. In that case, we also throw | |
8785 | the word away. */ | |
8786 | ||
8787 | if (*istring == '\0') | |
8788 | { | |
8789 | if (quoted_dollar_at == 0 && (had_quoted_null || quoted_state == PARTIALLY_QUOTED)) | |
726f6388 | 8790 | { |
726f6388 JA |
8791 | istring[0] = CTLNUL; |
8792 | istring[1] = '\0'; | |
ccc6cda3 | 8793 | tword = make_bare_word (istring); |
95732b49 | 8794 | tword->flags |= W_HASQUOTEDNULL; /* XXX */ |
ccc6cda3 JA |
8795 | list = make_word_list (tword, (WORD_LIST *)NULL); |
8796 | if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) | |
8797 | tword->flags |= W_QUOTED; | |
726f6388 | 8798 | } |
ccc6cda3 JA |
8799 | /* According to sh, ksh, and Posix.2, if a word expands into nothing |
8800 | and a double-quoted "$@" appears anywhere in it, then the entire | |
8801 | word is removed. */ | |
8802 | else if (quoted_state == UNQUOTED || quoted_dollar_at) | |
8803 | list = (WORD_LIST *)NULL; | |
8804 | #if 0 | |
8805 | else | |
726f6388 | 8806 | { |
ccc6cda3 | 8807 | tword = make_bare_word (istring); |
ccc6cda3 JA |
8808 | if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) |
8809 | tword->flags |= W_QUOTED; | |
95732b49 | 8810 | list = make_word_list (tword, (WORD_LIST *)NULL); |
726f6388 | 8811 | } |
f73dda09 JA |
8812 | #else |
8813 | else | |
8814 | list = (WORD_LIST *)NULL; | |
ccc6cda3 JA |
8815 | #endif |
8816 | } | |
8817 | else if (word->flags & W_NOSPLIT) | |
8818 | { | |
8819 | tword = make_bare_word (istring); | |
ccc6cda3 JA |
8820 | if (word->flags & W_ASSIGNMENT) |
8821 | tword->flags |= W_ASSIGNMENT; /* XXX */ | |
95732b49 JA |
8822 | if (word->flags & W_COMPASSIGN) |
8823 | tword->flags |= W_COMPASSIGN; /* XXX */ | |
b72432fd JA |
8824 | if (word->flags & W_NOGLOB) |
8825 | tword->flags |= W_NOGLOB; /* XXX */ | |
ac50fbac CR |
8826 | if (word->flags & W_NOBRACE) |
8827 | tword->flags |= W_NOBRACE; /* XXX */ | |
95732b49 JA |
8828 | if (word->flags & W_NOEXPAND) |
8829 | tword->flags |= W_NOEXPAND; /* XXX */ | |
ccc6cda3 | 8830 | if (quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) |
28ef6c31 | 8831 | tword->flags |= W_QUOTED; |
a601c749 | 8832 | if (had_quoted_null && QUOTED_NULL (istring)) |
95732b49 JA |
8833 | tword->flags |= W_HASQUOTEDNULL; |
8834 | list = make_word_list (tword, (WORD_LIST *)NULL); | |
ccc6cda3 JA |
8835 | } |
8836 | else | |
8837 | { | |
8838 | char *ifs_chars; | |
3b34f6e6 | 8839 | char *tstring; |
ccc6cda3 | 8840 | |
7117c2d2 | 8841 | ifs_chars = (quoted_dollar_at || has_dollar_at) ? ifs_value : (char *)NULL; |
726f6388 | 8842 | |
cce855bc JA |
8843 | /* If we have $@, we need to split the results no matter what. If |
8844 | IFS is unset or NULL, string_list_dollar_at has separated the | |
8845 | positional parameters with a space, so we split on space (we have | |
8846 | set ifs_chars to " \t\n" above if ifs is unset). If IFS is set, | |
8847 | string_list_dollar_at has separated the positional parameters | |
ac50fbac CR |
8848 | with the first character of $IFS, so we split on $IFS. If |
8849 | SPLIT_ON_SPACES is set, we expanded $* (unquoted) with IFS either | |
8850 | unset or null, and we want to make sure that we split on spaces | |
8851 | regardless of what else has happened to IFS since the expansion. */ | |
8852 | if (split_on_spaces) | |
8853 | list = list_string (istring, " ", 1); /* XXX quoted == 1? */ | |
3b34f6e6 CR |
8854 | /* If we have $@ (has_dollar_at != 0) and we are in a context where we |
8855 | don't want to split the result (W_NOSPLIT2), and we are not quoted, | |
8856 | we have already separated the arguments with the first character of | |
8857 | $IFS. In this case, we want to return a list with a single word | |
8858 | with the separator possibly replaced with a space (it's what other | |
8859 | shells seem to do). | |
8860 | quoted_dollar_at is internal to this function and is set if we are | |
8861 | passed an argument that is unquoted (quoted == 0) but we encounter a | |
8862 | double-quoted $@ while expanding it. */ | |
8863 | else if (has_dollar_at && quoted_dollar_at == 0 && ifs_chars && quoted == 0 && (word->flags & W_NOSPLIT2)) | |
8864 | { | |
8865 | /* Only split and rejoin if we have to */ | |
8866 | if (*ifs_chars && *ifs_chars != ' ') | |
8867 | { | |
8868 | list = list_string (istring, *ifs_chars ? ifs_chars : " ", 1); | |
8869 | tstring = string_list (list); | |
8870 | } | |
8871 | else | |
8872 | tstring = istring; | |
8873 | tword = make_bare_word (tstring); | |
8874 | if (tstring != istring) | |
8875 | free (tstring); | |
8876 | goto set_word_flags; | |
8877 | } | |
ac50fbac | 8878 | else if (has_dollar_at && ifs_chars) |
cce855bc | 8879 | list = list_string (istring, *ifs_chars ? ifs_chars : " ", 1); |
ccc6cda3 JA |
8880 | else |
8881 | { | |
8882 | tword = make_bare_word (istring); | |
3b34f6e6 | 8883 | set_word_flags: |
ccc6cda3 JA |
8884 | if ((quoted & (Q_DOUBLE_QUOTES|Q_HERE_DOCUMENT)) || (quoted_state == WHOLLY_QUOTED)) |
8885 | tword->flags |= W_QUOTED; | |
8886 | if (word->flags & W_ASSIGNMENT) | |
8887 | tword->flags |= W_ASSIGNMENT; | |
95732b49 JA |
8888 | if (word->flags & W_COMPASSIGN) |
8889 | tword->flags |= W_COMPASSIGN; | |
b72432fd JA |
8890 | if (word->flags & W_NOGLOB) |
8891 | tword->flags |= W_NOGLOB; | |
ac50fbac CR |
8892 | if (word->flags & W_NOBRACE) |
8893 | tword->flags |= W_NOBRACE; | |
95732b49 JA |
8894 | if (word->flags & W_NOEXPAND) |
8895 | tword->flags |= W_NOEXPAND; | |
a601c749 | 8896 | if (had_quoted_null && QUOTED_NULL (istring)) |
95732b49 JA |
8897 | tword->flags |= W_HASQUOTEDNULL; /* XXX */ |
8898 | list = make_word_list (tword, (WORD_LIST *)NULL); | |
726f6388 | 8899 | } |
726f6388 | 8900 | } |
726f6388 | 8901 | |
ccc6cda3 JA |
8902 | free (istring); |
8903 | return (list); | |
726f6388 JA |
8904 | } |
8905 | ||
8906 | /* **************************************************************** */ | |
8907 | /* */ | |
8908 | /* Functions for Quote Removal */ | |
8909 | /* */ | |
8910 | /* **************************************************************** */ | |
8911 | ||
8912 | /* Perform quote removal on STRING. If QUOTED > 0, assume we are obeying the | |
7117c2d2 | 8913 | backslash quoting rules for within double quotes or a here document. */ |
726f6388 JA |
8914 | char * |
8915 | string_quote_removal (string, quoted) | |
8916 | char *string; | |
8917 | int quoted; | |
8918 | { | |
7117c2d2 JA |
8919 | size_t slen; |
8920 | char *r, *result_string, *temp, *send; | |
f73dda09 JA |
8921 | int sindex, tindex, dquote; |
8922 | unsigned char c; | |
7117c2d2 | 8923 | DECLARE_MBSTATE; |
726f6388 JA |
8924 | |
8925 | /* The result can be no longer than the original string. */ | |
7117c2d2 JA |
8926 | slen = strlen (string); |
8927 | send = string + slen; | |
8928 | ||
8929 | r = result_string = (char *)xmalloc (slen + 1); | |
726f6388 | 8930 | |
ccc6cda3 | 8931 | for (dquote = sindex = 0; c = string[sindex];) |
726f6388 JA |
8932 | { |
8933 | switch (c) | |
8934 | { | |
8935 | case '\\': | |
8936 | c = string[++sindex]; | |
3185942a JA |
8937 | if (c == 0) |
8938 | { | |
8939 | *r++ = '\\'; | |
8940 | break; | |
8941 | } | |
28ef6c31 | 8942 | if (((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) || dquote) && (sh_syntaxtab[c] & CBSDQUOTE) == 0) |
726f6388 | 8943 | *r++ = '\\'; |
ccc6cda3 | 8944 | /* FALLTHROUGH */ |
726f6388 JA |
8945 | |
8946 | default: | |
7117c2d2 | 8947 | SCOPY_CHAR_M (r, string, send, sindex); |
726f6388 JA |
8948 | break; |
8949 | ||
8950 | case '\'': | |
ccc6cda3 | 8951 | if ((quoted & (Q_HERE_DOCUMENT|Q_DOUBLE_QUOTES)) || dquote) |
726f6388 JA |
8952 | { |
8953 | *r++ = c; | |
8954 | sindex++; | |
ccc6cda3 | 8955 | break; |
726f6388 | 8956 | } |
ccc6cda3 JA |
8957 | tindex = sindex + 1; |
8958 | temp = string_extract_single_quoted (string, &tindex); | |
8959 | if (temp) | |
726f6388 | 8960 | { |
ccc6cda3 JA |
8961 | strcpy (r, temp); |
8962 | r += strlen (r); | |
8963 | free (temp); | |
726f6388 | 8964 | } |
ccc6cda3 | 8965 | sindex = tindex; |
726f6388 JA |
8966 | break; |
8967 | ||
8968 | case '"': | |
8969 | dquote = 1 - dquote; | |
8970 | sindex++; | |
8971 | break; | |
8972 | } | |
8973 | } | |
8974 | *r = '\0'; | |
8975 | return (result_string); | |
8976 | } | |
8977 | ||
ccc6cda3 JA |
8978 | #if 0 |
8979 | /* UNUSED */ | |
726f6388 JA |
8980 | /* Perform quote removal on word WORD. This allocates and returns a new |
8981 | WORD_DESC *. */ | |
8982 | WORD_DESC * | |
8983 | word_quote_removal (word, quoted) | |
8984 | WORD_DESC *word; | |
8985 | int quoted; | |
8986 | { | |
8987 | WORD_DESC *w; | |
8988 | char *t; | |
8989 | ||
8990 | t = string_quote_removal (word->word, quoted); | |
95732b49 JA |
8991 | w = alloc_word_desc (); |
8992 | w->word = t ? t : savestring (""); | |
726f6388 JA |
8993 | return (w); |
8994 | } | |
8995 | ||
8996 | /* Perform quote removal on all words in LIST. If QUOTED is non-zero, | |
8997 | the members of the list are treated as if they are surrounded by | |
8998 | double quotes. Return a new list, or NULL if LIST is NULL. */ | |
8999 | WORD_LIST * | |
9000 | word_list_quote_removal (list, quoted) | |
9001 | WORD_LIST *list; | |
9002 | int quoted; | |
9003 | { | |
95732b49 | 9004 | WORD_LIST *result, *t, *tresult, *e; |
726f6388 | 9005 | |
ccc6cda3 | 9006 | for (t = list, result = (WORD_LIST *)NULL; t; t = t->next) |
726f6388 | 9007 | { |
7117c2d2 | 9008 | tresult = make_word_list (word_quote_removal (t->word, quoted), (WORD_LIST *)NULL); |
95732b49 | 9009 | #if 0 |
726f6388 | 9010 | result = (WORD_LIST *) list_append (result, tresult); |
95732b49 JA |
9011 | #else |
9012 | if (result == 0) | |
9013 | result = e = tresult; | |
9014 | else | |
9015 | { | |
9016 | e->next = tresult; | |
9017 | while (e->next) | |
9018 | e = e->next; | |
9019 | } | |
9020 | #endif | |
726f6388 JA |
9021 | } |
9022 | return (result); | |
9023 | } | |
ccc6cda3 | 9024 | #endif |
726f6388 | 9025 | |
726f6388 JA |
9026 | /******************************************* |
9027 | * * | |
9028 | * Functions to perform word splitting * | |
9029 | * * | |
9030 | *******************************************/ | |
9031 | ||
7117c2d2 JA |
9032 | void |
9033 | setifs (v) | |
9034 | SHELL_VAR *v; | |
b72432fd | 9035 | { |
7117c2d2 JA |
9036 | char *t; |
9037 | unsigned char uc; | |
9038 | ||
9039 | ifs_var = v; | |
95732b49 | 9040 | ifs_value = (v && value_cell (v)) ? value_cell (v) : " \t\n"; |
b72432fd | 9041 | |
ac50fbac CR |
9042 | ifs_is_set = ifs_var != 0; |
9043 | ifs_is_null = ifs_is_set && (*ifs_value == 0); | |
9044 | ||
95732b49 JA |
9045 | /* Should really merge ifs_cmap with sh_syntaxtab. XXX - doesn't yet |
9046 | handle multibyte chars in IFS */ | |
7117c2d2 JA |
9047 | memset (ifs_cmap, '\0', sizeof (ifs_cmap)); |
9048 | for (t = ifs_value ; t && *t; t++) | |
9049 | { | |
9050 | uc = *t; | |
9051 | ifs_cmap[uc] = 1; | |
9052 | } | |
9053 | ||
95732b49 JA |
9054 | #if defined (HANDLE_MULTIBYTE) |
9055 | if (ifs_value == 0) | |
9056 | { | |
9057 | ifs_firstc[0] = '\0'; | |
9058 | ifs_firstc_len = 1; | |
9059 | } | |
9060 | else | |
9061 | { | |
9062 | size_t ifs_len; | |
9063 | ifs_len = strnlen (ifs_value, MB_CUR_MAX); | |
9064 | ifs_firstc_len = MBLEN (ifs_value, ifs_len); | |
9065 | if (ifs_firstc_len == 1 || ifs_firstc_len == 0 || MB_INVALIDCH (ifs_firstc_len)) | |
9066 | { | |
9067 | ifs_firstc[0] = ifs_value[0]; | |
9068 | ifs_firstc[1] = '\0'; | |
9069 | ifs_firstc_len = 1; | |
9070 | } | |
9071 | else | |
9072 | memcpy (ifs_firstc, ifs_value, ifs_firstc_len); | |
9073 | } | |
9074 | #else | |
7117c2d2 | 9075 | ifs_firstc = ifs_value ? *ifs_value : 0; |
95732b49 | 9076 | #endif |
7117c2d2 JA |
9077 | } |
9078 | ||
9079 | char * | |
9080 | getifs () | |
9081 | { | |
9082 | return ifs_value; | |
b72432fd JA |
9083 | } |
9084 | ||
726f6388 JA |
9085 | /* This splits a single word into a WORD LIST on $IFS, but only if the word |
9086 | is not quoted. list_string () performs quote removal for us, even if we | |
9087 | don't do any splitting. */ | |
9088 | WORD_LIST * | |
7117c2d2 | 9089 | word_split (w, ifs_chars) |
726f6388 | 9090 | WORD_DESC *w; |
7117c2d2 | 9091 | char *ifs_chars; |
726f6388 JA |
9092 | { |
9093 | WORD_LIST *result; | |
9094 | ||
9095 | if (w) | |
9096 | { | |
7117c2d2 | 9097 | char *xifs; |
726f6388 | 9098 | |
7117c2d2 JA |
9099 | xifs = ((w->flags & W_QUOTED) || ifs_chars == 0) ? "" : ifs_chars; |
9100 | result = list_string (w->word, xifs, w->flags & W_QUOTED); | |
726f6388 JA |
9101 | } |
9102 | else | |
9103 | result = (WORD_LIST *)NULL; | |
ccc6cda3 | 9104 | |
726f6388 JA |
9105 | return (result); |
9106 | } | |
9107 | ||
9108 | /* Perform word splitting on LIST and return the RESULT. It is possible | |
9109 | to return (WORD_LIST *)NULL. */ | |
9110 | static WORD_LIST * | |
9111 | word_list_split (list) | |
9112 | WORD_LIST *list; | |
9113 | { | |
95732b49 | 9114 | WORD_LIST *result, *t, *tresult, *e; |
726f6388 | 9115 | |
ccc6cda3 | 9116 | for (t = list, result = (WORD_LIST *)NULL; t; t = t->next) |
726f6388 | 9117 | { |
7117c2d2 | 9118 | tresult = word_split (t->word, ifs_value); |
95732b49 JA |
9119 | if (result == 0) |
9120 | result = e = tresult; | |
9121 | else | |
9122 | { | |
9123 | e->next = tresult; | |
9124 | while (e->next) | |
9125 | e = e->next; | |
9126 | } | |
726f6388 JA |
9127 | } |
9128 | return (result); | |
9129 | } | |
9130 | ||
9131 | /************************************************** | |
9132 | * * | |
cce855bc | 9133 | * Functions to expand an entire WORD_LIST * |
726f6388 JA |
9134 | * * |
9135 | **************************************************/ | |
9136 | ||
b80f6443 JA |
9137 | /* Do any word-expansion-specific cleanup and jump to top_level */ |
9138 | static void | |
9139 | exp_jump_to_top_level (v) | |
9140 | int v; | |
9141 | { | |
3185942a JA |
9142 | set_pipestatus_from_exit (last_command_exit_value); |
9143 | ||
b80f6443 JA |
9144 | /* Cleanup code goes here. */ |
9145 | expand_no_split_dollar_star = 0; /* XXX */ | |
9146 | expanding_redir = 0; | |
3185942a | 9147 | assigning_in_environment = 0; |
b80f6443 | 9148 | |
f1be666c JA |
9149 | if (parse_and_execute_level == 0) |
9150 | top_level_cleanup (); /* from sig.c */ | |
9151 | ||
b80f6443 JA |
9152 | jump_to_top_level (v); |
9153 | } | |
9154 | ||
cce855bc JA |
9155 | /* Put NLIST (which is a WORD_LIST * of only one element) at the front of |
9156 | ELIST, and set ELIST to the new list. */ | |
9157 | #define PREPEND_LIST(nlist, elist) \ | |
9158 | do { nlist->next = elist; elist = nlist; } while (0) | |
9159 | ||
726f6388 JA |
9160 | /* Separate out any initial variable assignments from TLIST. If set -k has |
9161 | been executed, remove all assignment statements from TLIST. Initial | |
9162 | variable assignments and other environment assignments are placed | |
bb70624e | 9163 | on SUBST_ASSIGN_VARLIST. */ |
726f6388 JA |
9164 | static WORD_LIST * |
9165 | separate_out_assignments (tlist) | |
9166 | WORD_LIST *tlist; | |
9167 | { | |
9168 | register WORD_LIST *vp, *lp; | |
9169 | ||
0001803f | 9170 | if (tlist == 0) |
726f6388 JA |
9171 | return ((WORD_LIST *)NULL); |
9172 | ||
bb70624e JA |
9173 | if (subst_assign_varlist) |
9174 | dispose_words (subst_assign_varlist); /* Clean up after previous error */ | |
b72432fd | 9175 | |
bb70624e | 9176 | subst_assign_varlist = (WORD_LIST *)NULL; |
726f6388 JA |
9177 | vp = lp = tlist; |
9178 | ||
9179 | /* Separate out variable assignments at the start of the command. | |
9180 | Loop invariant: vp->next == lp | |
9181 | Loop postcondition: | |
7117c2d2 JA |
9182 | lp = list of words left after assignment statements skipped |
9183 | tlist = original list of words | |
726f6388 | 9184 | */ |
ccc6cda3 | 9185 | while (lp && (lp->word->flags & W_ASSIGNMENT)) |
726f6388 JA |
9186 | { |
9187 | vp = lp; | |
9188 | lp = lp->next; | |
9189 | } | |
9190 | ||
bb70624e JA |
9191 | /* If lp != tlist, we have some initial assignment statements. |
9192 | We make SUBST_ASSIGN_VARLIST point to the list of assignment | |
9193 | words and TLIST point to the remaining words. */ | |
726f6388 JA |
9194 | if (lp != tlist) |
9195 | { | |
bb70624e | 9196 | subst_assign_varlist = tlist; |
726f6388 JA |
9197 | /* ASSERT(vp->next == lp); */ |
9198 | vp->next = (WORD_LIST *)NULL; /* terminate variable list */ | |
9199 | tlist = lp; /* remainder of word list */ | |
9200 | } | |
9201 | ||
9202 | /* vp == end of variable list */ | |
9203 | /* tlist == remainder of original word list without variable assignments */ | |
9204 | if (!tlist) | |
9205 | /* All the words in tlist were assignment statements */ | |
9206 | return ((WORD_LIST *)NULL); | |
9207 | ||
9208 | /* ASSERT(tlist != NULL); */ | |
ccc6cda3 | 9209 | /* ASSERT((tlist->word->flags & W_ASSIGNMENT) == 0); */ |
726f6388 JA |
9210 | |
9211 | /* If the -k option is in effect, we need to go through the remaining | |
bb70624e JA |
9212 | words, separate out the assignment words, and place them on |
9213 | SUBST_ASSIGN_VARLIST. */ | |
726f6388 JA |
9214 | if (place_keywords_in_env) |
9215 | { | |
9216 | WORD_LIST *tp; /* tp == running pointer into tlist */ | |
9217 | ||
9218 | tp = tlist; | |
9219 | lp = tlist->next; | |
9220 | ||
9221 | /* Loop Invariant: tp->next == lp */ | |
9222 | /* Loop postcondition: tlist == word list without assignment statements */ | |
9223 | while (lp) | |
9224 | { | |
ccc6cda3 | 9225 | if (lp->word->flags & W_ASSIGNMENT) |
726f6388 JA |
9226 | { |
9227 | /* Found an assignment statement, add this word to end of | |
bb70624e JA |
9228 | subst_assign_varlist (vp). */ |
9229 | if (!subst_assign_varlist) | |
9230 | subst_assign_varlist = vp = lp; | |
726f6388 JA |
9231 | else |
9232 | { | |
9233 | vp->next = lp; | |
9234 | vp = lp; | |
9235 | } | |
9236 | ||
9237 | /* Remove the word pointed to by LP from TLIST. */ | |
9238 | tp->next = lp->next; | |
9239 | /* ASSERT(vp == lp); */ | |
9240 | lp->next = (WORD_LIST *)NULL; | |
9241 | lp = tp->next; | |
9242 | } | |
9243 | else | |
9244 | { | |
9245 | tp = lp; | |
9246 | lp = lp->next; | |
9247 | } | |
9248 | } | |
9249 | } | |
9250 | return (tlist); | |
9251 | } | |
9252 | ||
cce855bc JA |
9253 | #define WEXP_VARASSIGN 0x001 |
9254 | #define WEXP_BRACEEXP 0x002 | |
9255 | #define WEXP_TILDEEXP 0x004 | |
9256 | #define WEXP_PARAMEXP 0x008 | |
9257 | #define WEXP_PATHEXP 0x010 | |
9258 | ||
9259 | /* All of the expansions, including variable assignments at the start of | |
9260 | the list. */ | |
9261 | #define WEXP_ALL (WEXP_VARASSIGN|WEXP_BRACEEXP|WEXP_TILDEEXP|WEXP_PARAMEXP|WEXP_PATHEXP) | |
9262 | ||
9263 | /* All of the expansions except variable assignments at the start of | |
9264 | the list. */ | |
9265 | #define WEXP_NOVARS (WEXP_BRACEEXP|WEXP_TILDEEXP|WEXP_PARAMEXP|WEXP_PATHEXP) | |
9266 | ||
9267 | /* All of the `shell expansions': brace expansion, tilde expansion, parameter | |
9268 | expansion, command substitution, arithmetic expansion, word splitting, and | |
9269 | quote removal. */ | |
9270 | #define WEXP_SHELLEXP (WEXP_BRACEEXP|WEXP_TILDEEXP|WEXP_PARAMEXP) | |
9271 | ||
726f6388 JA |
9272 | /* Take the list of words in LIST and do the various substitutions. Return |
9273 | a new list of words which is the expanded list, and without things like | |
9274 | variable assignments. */ | |
9275 | ||
9276 | WORD_LIST * | |
9277 | expand_words (list) | |
9278 | WORD_LIST *list; | |
9279 | { | |
cce855bc | 9280 | return (expand_word_list_internal (list, WEXP_ALL)); |
726f6388 JA |
9281 | } |
9282 | ||
9283 | /* Same as expand_words (), but doesn't hack variable or environment | |
9284 | variables. */ | |
9285 | WORD_LIST * | |
9286 | expand_words_no_vars (list) | |
9287 | WORD_LIST *list; | |
9288 | { | |
cce855bc | 9289 | return (expand_word_list_internal (list, WEXP_NOVARS)); |
726f6388 JA |
9290 | } |
9291 | ||
cce855bc JA |
9292 | WORD_LIST * |
9293 | expand_words_shellexp (list) | |
726f6388 | 9294 | WORD_LIST *list; |
726f6388 | 9295 | { |
cce855bc JA |
9296 | return (expand_word_list_internal (list, WEXP_SHELLEXP)); |
9297 | } | |
726f6388 | 9298 | |
cce855bc JA |
9299 | static WORD_LIST * |
9300 | glob_expand_word_list (tlist, eflags) | |
9301 | WORD_LIST *tlist; | |
9302 | int eflags; | |
9303 | { | |
9304 | char **glob_array, *temp_string; | |
9305 | register int glob_index; | |
9306 | WORD_LIST *glob_list, *output_list, *disposables, *next; | |
9307 | WORD_DESC *tword; | |
726f6388 | 9308 | |
cce855bc JA |
9309 | output_list = disposables = (WORD_LIST *)NULL; |
9310 | glob_array = (char **)NULL; | |
9311 | while (tlist) | |
9312 | { | |
9313 | /* For each word, either globbing is attempted or the word is | |
9314 | added to orig_list. If globbing succeeds, the results are | |
9315 | added to orig_list and the word (tlist) is added to the list | |
9316 | of disposable words. If globbing fails and failed glob | |
9317 | expansions are left unchanged (the shell default), the | |
9318 | original word is added to orig_list. If globbing fails and | |
9319 | failed glob expansions are removed, the original word is | |
9320 | added to the list of disposable words. orig_list ends up | |
7117c2d2 | 9321 | in reverse order and requires a call to REVERSE_LIST to |
cce855bc JA |
9322 | be set right. After all words are examined, the disposable |
9323 | words are freed. */ | |
9324 | next = tlist->next; | |
726f6388 | 9325 | |
cce855bc | 9326 | /* If the word isn't an assignment and contains an unquoted |
28ef6c31 | 9327 | pattern matching character, then glob it. */ |
b72432fd | 9328 | if ((tlist->word->flags & W_NOGLOB) == 0 && |
cce855bc | 9329 | unquoted_glob_pattern_p (tlist->word->word)) |
726f6388 | 9330 | { |
cce855bc JA |
9331 | glob_array = shell_glob_filename (tlist->word->word); |
9332 | ||
9333 | /* Handle error cases. | |
9334 | I don't think we should report errors like "No such file | |
9335 | or directory". However, I would like to report errors | |
9336 | like "Read failed". */ | |
9337 | ||
b80f6443 | 9338 | if (glob_array == 0 || GLOB_FAILED (glob_array)) |
726f6388 | 9339 | { |
bb70624e | 9340 | glob_array = (char **)xmalloc (sizeof (char *)); |
cce855bc JA |
9341 | glob_array[0] = (char *)NULL; |
9342 | } | |
9343 | ||
9344 | /* Dequote the current word in case we have to use it. */ | |
9345 | if (glob_array[0] == NULL) | |
9346 | { | |
9347 | temp_string = dequote_string (tlist->word->word); | |
9348 | free (tlist->word->word); | |
9349 | tlist->word->word = temp_string; | |
9350 | } | |
9351 | ||
9352 | /* Make the array into a word list. */ | |
9353 | glob_list = (WORD_LIST *)NULL; | |
9354 | for (glob_index = 0; glob_array[glob_index]; glob_index++) | |
9355 | { | |
9356 | tword = make_bare_word (glob_array[glob_index]); | |
cce855bc JA |
9357 | glob_list = make_word_list (tword, glob_list); |
9358 | } | |
9359 | ||
9360 | if (glob_list) | |
9361 | { | |
9362 | output_list = (WORD_LIST *)list_append (glob_list, output_list); | |
9363 | PREPEND_LIST (tlist, disposables); | |
9364 | } | |
b80f6443 JA |
9365 | else if (fail_glob_expansion != 0) |
9366 | { | |
ac50fbac | 9367 | last_command_exit_value = EXECUTION_FAILURE; |
b80f6443 | 9368 | report_error (_("no match: %s"), tlist->word->word); |
f1be666c | 9369 | exp_jump_to_top_level (DISCARD); |
b80f6443 | 9370 | } |
cce855bc JA |
9371 | else if (allow_null_glob_expansion == 0) |
9372 | { | |
9373 | /* Failed glob expressions are left unchanged. */ | |
9374 | PREPEND_LIST (tlist, output_list); | |
9375 | } | |
9376 | else | |
9377 | { | |
9378 | /* Failed glob expressions are removed. */ | |
9379 | PREPEND_LIST (tlist, disposables); | |
726f6388 | 9380 | } |
726f6388 | 9381 | } |
cce855bc JA |
9382 | else |
9383 | { | |
9384 | /* Dequote the string. */ | |
9385 | temp_string = dequote_string (tlist->word->word); | |
9386 | free (tlist->word->word); | |
9387 | tlist->word->word = temp_string; | |
9388 | PREPEND_LIST (tlist, output_list); | |
9389 | } | |
9390 | ||
7117c2d2 | 9391 | strvec_dispose (glob_array); |
cce855bc JA |
9392 | glob_array = (char **)NULL; |
9393 | ||
9394 | tlist = next; | |
726f6388 JA |
9395 | } |
9396 | ||
cce855bc JA |
9397 | if (disposables) |
9398 | dispose_words (disposables); | |
9399 | ||
9400 | if (output_list) | |
9401 | output_list = REVERSE_LIST (output_list, WORD_LIST *); | |
9402 | ||
9403 | return (output_list); | |
9404 | } | |
726f6388 JA |
9405 | |
9406 | #if defined (BRACE_EXPANSION) | |
cce855bc JA |
9407 | static WORD_LIST * |
9408 | brace_expand_word_list (tlist, eflags) | |
9409 | WORD_LIST *tlist; | |
9410 | int eflags; | |
9411 | { | |
9412 | register char **expansions; | |
9413 | char *temp_string; | |
9414 | WORD_LIST *disposables, *output_list, *next; | |
9415 | WORD_DESC *w; | |
9416 | int eindex; | |
9417 | ||
9418 | for (disposables = output_list = (WORD_LIST *)NULL; tlist; tlist = next) | |
726f6388 | 9419 | { |
cce855bc | 9420 | next = tlist->next; |
726f6388 | 9421 | |
ac50fbac CR |
9422 | if (tlist->word->flags & W_NOBRACE) |
9423 | { | |
9424 | /*itrace("brace_expand_word_list: %s: W_NOBRACE", tlist->word->word);*/ | |
9425 | PREPEND_LIST (tlist, output_list); | |
9426 | continue; | |
9427 | } | |
9428 | ||
0001803f CR |
9429 | if ((tlist->word->flags & (W_COMPASSIGN|W_ASSIGNARG)) == (W_COMPASSIGN|W_ASSIGNARG)) |
9430 | { | |
9431 | /*itrace("brace_expand_word_list: %s: W_COMPASSIGN|W_ASSIGNARG", tlist->word->word);*/ | |
9432 | PREPEND_LIST (tlist, output_list); | |
9433 | continue; | |
9434 | } | |
ac50fbac | 9435 | |
cce855bc JA |
9436 | /* Only do brace expansion if the word has a brace character. If |
9437 | not, just add the word list element to BRACES and continue. In | |
9438 | the common case, at least when running shell scripts, this will | |
0001803f | 9439 | degenerate to a bunch of calls to `mbschr', and then what is |
cce855bc | 9440 | basically a reversal of TLIST into BRACES, which is corrected |
7117c2d2 | 9441 | by a call to REVERSE_LIST () on BRACES when the end of TLIST |
cce855bc | 9442 | is reached. */ |
0001803f | 9443 | if (mbschr (tlist->word->word, LBRACE)) |
726f6388 | 9444 | { |
cce855bc | 9445 | expansions = brace_expand (tlist->word->word); |
726f6388 | 9446 | |
cce855bc | 9447 | for (eindex = 0; temp_string = expansions[eindex]; eindex++) |
726f6388 | 9448 | { |
ac50fbac CR |
9449 | w = alloc_word_desc (); |
9450 | w->word = temp_string; | |
9451 | ||
cce855bc JA |
9452 | /* If brace expansion didn't change the word, preserve |
9453 | the flags. We may want to preserve the flags | |
9454 | unconditionally someday -- XXX */ | |
9455 | if (STREQ (temp_string, tlist->word->word)) | |
9456 | w->flags = tlist->word->flags; | |
ac50fbac CR |
9457 | else |
9458 | w = make_word_flags (w, temp_string); | |
9459 | ||
cce855bc | 9460 | output_list = make_word_list (w, output_list); |
726f6388 | 9461 | } |
cce855bc | 9462 | free (expansions); |
726f6388 | 9463 | |
cce855bc JA |
9464 | /* Add TLIST to the list of words to be freed after brace |
9465 | expansion has been performed. */ | |
9466 | PREPEND_LIST (tlist, disposables); | |
9467 | } | |
9468 | else | |
9469 | PREPEND_LIST (tlist, output_list); | |
726f6388 | 9470 | } |
cce855bc JA |
9471 | |
9472 | if (disposables) | |
9473 | dispose_words (disposables); | |
9474 | ||
9475 | if (output_list) | |
9476 | output_list = REVERSE_LIST (output_list, WORD_LIST *); | |
9477 | ||
9478 | return (output_list); | |
9479 | } | |
9480 | #endif | |
9481 | ||
3185942a JA |
9482 | #if defined (ARRAY_VARS) |
9483 | /* Take WORD, a compound associative array assignment, and internally run | |
9484 | 'declare -A w', where W is the variable name portion of WORD. */ | |
9485 | static int | |
9486 | make_internal_declare (word, option) | |
9487 | char *word; | |
9488 | char *option; | |
9489 | { | |
9490 | int t; | |
9491 | WORD_LIST *wl; | |
9492 | WORD_DESC *w; | |
9493 | ||
9494 | w = make_word (word); | |
9495 | ||
9496 | t = assignment (w->word, 0); | |
9497 | w->word[t] = '\0'; | |
9498 | ||
9499 | wl = make_word_list (w, (WORD_LIST *)NULL); | |
9500 | wl = make_word_list (make_word (option), wl); | |
9501 | ||
9502 | return (declare_builtin (wl)); | |
9503 | } | |
9504 | #endif | |
9505 | ||
cce855bc JA |
9506 | static WORD_LIST * |
9507 | shell_expand_word_list (tlist, eflags) | |
9508 | WORD_LIST *tlist; | |
9509 | int eflags; | |
9510 | { | |
9511 | WORD_LIST *expanded, *orig_list, *new_list, *next, *temp_list; | |
9512 | int expanded_something, has_dollar_at; | |
9513 | char *temp_string; | |
726f6388 | 9514 | |
726f6388 | 9515 | /* We do tilde expansion all the time. This is what 1003.2 says. */ |
cce855bc JA |
9516 | new_list = (WORD_LIST *)NULL; |
9517 | for (orig_list = tlist; tlist; tlist = next) | |
726f6388 | 9518 | { |
ccc6cda3 | 9519 | temp_string = tlist->word->word; |
726f6388 JA |
9520 | |
9521 | next = tlist->next; | |
9522 | ||
95732b49 JA |
9523 | #if defined (ARRAY_VARS) |
9524 | /* If this is a compound array assignment to a builtin that accepts | |
9525 | such assignments (e.g., `declare'), take the assignment and perform | |
9526 | it separately, handling the semantics of declarations inside shell | |
9527 | functions. This avoids the double-evaluation of such arguments, | |
9528 | because `declare' does some evaluation of compound assignments on | |
9529 | its own. */ | |
9530 | if ((tlist->word->flags & (W_COMPASSIGN|W_ASSIGNARG)) == (W_COMPASSIGN|W_ASSIGNARG)) | |
9531 | { | |
9532 | int t; | |
ac50fbac CR |
9533 | char opts[8], opti; |
9534 | ||
9535 | opti = 0; | |
9536 | if (tlist->word->flags & (W_ASSIGNASSOC|W_ASSNGLOBAL|W_ASSIGNARRAY)) | |
9537 | opts[opti++] = '-'; | |
9538 | ||
9539 | if ((tlist->word->flags & (W_ASSIGNASSOC|W_ASSNGLOBAL)) == (W_ASSIGNASSOC|W_ASSNGLOBAL)) | |
9540 | { | |
9541 | opts[opti++] = 'g'; | |
9542 | opts[opti++] = 'A'; | |
9543 | } | |
9544 | else if (tlist->word->flags & W_ASSIGNASSOC) | |
9545 | opts[opti++] = 'A'; | |
9546 | else if ((tlist->word->flags & (W_ASSIGNARRAY|W_ASSNGLOBAL)) == (W_ASSIGNARRAY|W_ASSNGLOBAL)) | |
9547 | { | |
9548 | opts[opti++] = 'g'; | |
9549 | opts[opti++] = 'a'; | |
9550 | } | |
9551 | else if (tlist->word->flags & W_ASSIGNARRAY) | |
9552 | opts[opti++] = 'a'; | |
9553 | else if (tlist->word->flags & W_ASSNGLOBAL) | |
9554 | opts[opti++] = 'g'; | |
95732b49 | 9555 | |
ac50fbac CR |
9556 | #if 0 |
9557 | /* If we have special handling note the integer attribute */ | |
9558 | if (opti > 0 && (tlist->word->flags & W_ASSIGNINT)) | |
9559 | opts[opti++] = 'i'; | |
9560 | #endif | |
9561 | ||
9562 | opts[opti] = '\0'; | |
9563 | if (opti > 0) | |
9564 | make_internal_declare (tlist->word->word, opts); | |
3185942a | 9565 | |
495aee44 | 9566 | t = do_word_assignment (tlist->word, 0); |
95732b49 JA |
9567 | if (t == 0) |
9568 | { | |
9569 | last_command_exit_value = EXECUTION_FAILURE; | |
9570 | exp_jump_to_top_level (DISCARD); | |
9571 | } | |
9572 | ||
9573 | /* Now transform the word as ksh93 appears to do and go on */ | |
9574 | t = assignment (tlist->word->word, 0); | |
9575 | tlist->word->word[t] = '\0'; | |
ac50fbac | 9576 | tlist->word->flags &= ~(W_ASSIGNMENT|W_NOSPLIT|W_COMPASSIGN|W_ASSIGNARG|W_ASSIGNASSOC|W_ASSIGNARRAY); |
726f6388 | 9577 | } |
95732b49 | 9578 | #endif |
726f6388 | 9579 | |
ccc6cda3 | 9580 | expanded_something = 0; |
726f6388 | 9581 | expanded = expand_word_internal |
b72432fd | 9582 | (tlist->word, 0, 0, &has_dollar_at, &expanded_something); |
726f6388 JA |
9583 | |
9584 | if (expanded == &expand_word_error || expanded == &expand_word_fatal) | |
9585 | { | |
9586 | /* By convention, each time this error is returned, | |
9587 | tlist->word->word has already been freed. */ | |
9588 | tlist->word->word = (char *)NULL; | |
ccc6cda3 | 9589 | |
726f6388 JA |
9590 | /* Dispose our copy of the original list. */ |
9591 | dispose_words (orig_list); | |
d166f048 | 9592 | /* Dispose the new list we're building. */ |
726f6388 JA |
9593 | dispose_words (new_list); |
9594 | ||
28ef6c31 | 9595 | last_command_exit_value = EXECUTION_FAILURE; |
726f6388 | 9596 | if (expanded == &expand_word_error) |
b80f6443 | 9597 | exp_jump_to_top_level (DISCARD); |
726f6388 | 9598 | else |
b80f6443 | 9599 | exp_jump_to_top_level (FORCE_EOF); |
726f6388 JA |
9600 | } |
9601 | ||
ccc6cda3 JA |
9602 | /* Don't split words marked W_NOSPLIT. */ |
9603 | if (expanded_something && (tlist->word->flags & W_NOSPLIT) == 0) | |
726f6388 | 9604 | { |
ccc6cda3 | 9605 | temp_list = word_list_split (expanded); |
726f6388 JA |
9606 | dispose_words (expanded); |
9607 | } | |
9608 | else | |
9609 | { | |
9610 | /* If no parameter expansion, command substitution, process | |
9611 | substitution, or arithmetic substitution took place, then | |
9612 | do not do word splitting. We still have to remove quoted | |
9613 | null characters from the result. */ | |
9614 | word_list_remove_quoted_nulls (expanded); | |
ccc6cda3 | 9615 | temp_list = expanded; |
726f6388 JA |
9616 | } |
9617 | ||
ccc6cda3 JA |
9618 | expanded = REVERSE_LIST (temp_list, WORD_LIST *); |
9619 | new_list = (WORD_LIST *)list_append (expanded, new_list); | |
726f6388 JA |
9620 | } |
9621 | ||
cce855bc JA |
9622 | if (orig_list) |
9623 | dispose_words (orig_list); | |
726f6388 | 9624 | |
726f6388 | 9625 | if (new_list) |
cce855bc | 9626 | new_list = REVERSE_LIST (new_list, WORD_LIST *); |
726f6388 | 9627 | |
cce855bc JA |
9628 | return (new_list); |
9629 | } | |
726f6388 | 9630 | |
cce855bc JA |
9631 | /* The workhorse for expand_words () and expand_words_no_vars (). |
9632 | First arg is LIST, a WORD_LIST of words. | |
b72432fd JA |
9633 | Second arg EFLAGS is a flags word controlling which expansions are |
9634 | performed. | |
726f6388 | 9635 | |
cce855bc JA |
9636 | This does all of the substitutions: brace expansion, tilde expansion, |
9637 | parameter expansion, command substitution, arithmetic expansion, | |
9638 | process substitution, word splitting, and pathname expansion, according | |
9639 | to the bits set in EFLAGS. Words with the W_QUOTED or W_NOSPLIT bits | |
9640 | set, or for which no expansion is done, do not undergo word splitting. | |
ac50fbac CR |
9641 | Words with the W_NOGLOB bit set do not undergo pathname expansion; words |
9642 | with W_NOBRACE set do not undergo brace expansion (see | |
9643 | brace_expand_word_list above). */ | |
cce855bc JA |
9644 | static WORD_LIST * |
9645 | expand_word_list_internal (list, eflags) | |
9646 | WORD_LIST *list; | |
9647 | int eflags; | |
9648 | { | |
9649 | WORD_LIST *new_list, *temp_list; | |
9650 | int tint; | |
726f6388 | 9651 | |
ac50fbac | 9652 | tempenv_assign_error = 0; |
cce855bc JA |
9653 | if (list == 0) |
9654 | return ((WORD_LIST *)NULL); | |
726f6388 | 9655 | |
bb70624e | 9656 | garglist = new_list = copy_word_list (list); |
cce855bc JA |
9657 | if (eflags & WEXP_VARASSIGN) |
9658 | { | |
bb70624e | 9659 | garglist = new_list = separate_out_assignments (new_list); |
cce855bc JA |
9660 | if (new_list == 0) |
9661 | { | |
bb70624e | 9662 | if (subst_assign_varlist) |
cce855bc JA |
9663 | { |
9664 | /* All the words were variable assignments, so they are placed | |
9665 | into the shell's environment. */ | |
bb70624e | 9666 | for (temp_list = subst_assign_varlist; temp_list; temp_list = temp_list->next) |
cce855bc JA |
9667 | { |
9668 | this_command_name = (char *)NULL; /* no arithmetic errors */ | |
495aee44 | 9669 | tint = do_word_assignment (temp_list->word, 0); |
cce855bc JA |
9670 | /* Variable assignment errors in non-interactive shells |
9671 | running in Posix.2 mode cause the shell to exit. */ | |
28ef6c31 | 9672 | if (tint == 0) |
ccc6cda3 | 9673 | { |
cce855bc | 9674 | last_command_exit_value = EXECUTION_FAILURE; |
28ef6c31 | 9675 | if (interactive_shell == 0 && posixly_correct) |
b80f6443 | 9676 | exp_jump_to_top_level (FORCE_EOF); |
28ef6c31 | 9677 | else |
b80f6443 | 9678 | exp_jump_to_top_level (DISCARD); |
ccc6cda3 | 9679 | } |
726f6388 | 9680 | } |
bb70624e JA |
9681 | dispose_words (subst_assign_varlist); |
9682 | subst_assign_varlist = (WORD_LIST *)NULL; | |
cce855bc JA |
9683 | } |
9684 | return ((WORD_LIST *)NULL); | |
9685 | } | |
9686 | } | |
726f6388 | 9687 | |
cce855bc JA |
9688 | /* Begin expanding the words that remain. The expansions take place on |
9689 | things that aren't really variable assignments. */ | |
726f6388 | 9690 | |
cce855bc JA |
9691 | #if defined (BRACE_EXPANSION) |
9692 | /* Do brace expansion on this word if there are any brace characters | |
9693 | in the string. */ | |
9694 | if ((eflags & WEXP_BRACEEXP) && brace_expansion && new_list) | |
9695 | new_list = brace_expand_word_list (new_list, eflags); | |
9696 | #endif /* BRACE_EXPANSION */ | |
726f6388 | 9697 | |
cce855bc JA |
9698 | /* Perform the `normal' shell expansions: tilde expansion, parameter and |
9699 | variable substitution, command substitution, arithmetic expansion, | |
9700 | and word splitting. */ | |
9701 | new_list = shell_expand_word_list (new_list, eflags); | |
726f6388 | 9702 | |
cce855bc JA |
9703 | /* Okay, we're almost done. Now let's just do some filename |
9704 | globbing. */ | |
9705 | if (new_list) | |
9706 | { | |
9707 | if ((eflags & WEXP_PATHEXP) && disallow_filename_globbing == 0) | |
9708 | /* Glob expand the word list unless globbing has been disabled. */ | |
9709 | new_list = glob_expand_word_list (new_list, eflags); | |
726f6388 | 9710 | else |
cce855bc JA |
9711 | /* Dequote the words, because we're not performing globbing. */ |
9712 | new_list = dequote_list (new_list); | |
726f6388 JA |
9713 | } |
9714 | ||
bb70624e | 9715 | if ((eflags & WEXP_VARASSIGN) && subst_assign_varlist) |
726f6388 | 9716 | { |
95732b49 | 9717 | sh_wassign_func_t *assign_func; |
495aee44 | 9718 | int is_special_builtin, is_builtin_or_func; |
726f6388 JA |
9719 | |
9720 | /* If the remainder of the words expand to nothing, Posix.2 requires | |
9721 | that the variable and environment assignments affect the shell's | |
9722 | environment. */ | |
95732b49 | 9723 | assign_func = new_list ? assign_in_env : do_word_assignment; |
b80f6443 | 9724 | tempenv_assign_error = 0; |
726f6388 | 9725 | |
495aee44 CR |
9726 | is_builtin_or_func = (new_list && new_list->word && (find_shell_builtin (new_list->word->word) || find_function (new_list->word->word))); |
9727 | /* Posix says that special builtins exit if a variable assignment error | |
9728 | occurs in an assignment preceding it. */ | |
9729 | is_special_builtin = (posixly_correct && new_list && new_list->word && find_special_builtin (new_list->word->word)); | |
9730 | ||
bb70624e | 9731 | for (temp_list = subst_assign_varlist; temp_list; temp_list = temp_list->next) |
726f6388 | 9732 | { |
ccc6cda3 | 9733 | this_command_name = (char *)NULL; |
3185942a | 9734 | assigning_in_environment = (assign_func == assign_in_env); |
495aee44 | 9735 | tint = (*assign_func) (temp_list->word, is_builtin_or_func); |
3185942a | 9736 | assigning_in_environment = 0; |
ccc6cda3 JA |
9737 | /* Variable assignment errors in non-interactive shells running |
9738 | in Posix.2 mode cause the shell to exit. */ | |
b80f6443 | 9739 | if (tint == 0) |
ccc6cda3 | 9740 | { |
95732b49 | 9741 | if (assign_func == do_word_assignment) |
b80f6443 JA |
9742 | { |
9743 | last_command_exit_value = EXECUTION_FAILURE; | |
495aee44 | 9744 | if (interactive_shell == 0 && posixly_correct && is_special_builtin) |
b80f6443 JA |
9745 | exp_jump_to_top_level (FORCE_EOF); |
9746 | else | |
9747 | exp_jump_to_top_level (DISCARD); | |
9748 | } | |
28ef6c31 | 9749 | else |
b80f6443 | 9750 | tempenv_assign_error++; |
ccc6cda3 | 9751 | } |
726f6388 | 9752 | } |
726f6388 | 9753 | |
bb70624e JA |
9754 | dispose_words (subst_assign_varlist); |
9755 | subst_assign_varlist = (WORD_LIST *)NULL; | |
726f6388 JA |
9756 | } |
9757 | ||
cce855bc | 9758 | return (new_list); |
ccc6cda3 | 9759 | } |