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Commit | Line | Data |
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3185942a | 1 | /* parse.y - Yacc grammar for bash. */ |
726f6388 | 2 | |
ac50fbac | 3 | /* Copyright (C) 1989-2012 Free Software Foundation, Inc. |
726f6388 JA |
4 | |
5 | This file is part of GNU Bash, the Bourne Again SHell. | |
6 | ||
3185942a JA |
7 | Bash is free software: you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation, either version 3 of the License, or | |
10 | (at your option) any later version. | |
726f6388 | 11 | |
3185942a JA |
12 | Bash is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
726f6388 | 16 | |
3185942a JA |
17 | You should have received a copy of the GNU General Public License |
18 | along with Bash. If not, see <http://www.gnu.org/licenses/>. | |
19 | */ | |
726f6388 JA |
20 | |
21 | %{ | |
ccc6cda3 JA |
22 | #include "config.h" |
23 | ||
726f6388 | 24 | #include "bashtypes.h" |
726f6388 | 25 | #include "bashansi.h" |
ccc6cda3 | 26 | |
28ef6c31 JA |
27 | #include "filecntl.h" |
28 | ||
ccc6cda3 JA |
29 | #if defined (HAVE_UNISTD_H) |
30 | # include <unistd.h> | |
31 | #endif | |
32 | ||
33 | #if defined (HAVE_LOCALE_H) | |
34 | # include <locale.h> | |
35 | #endif | |
36 | ||
37 | #include <stdio.h> | |
f73dda09 | 38 | #include "chartypes.h" |
ccc6cda3 JA |
39 | #include <signal.h> |
40 | ||
41 | #include "memalloc.h" | |
42 | ||
b80f6443 JA |
43 | #include "bashintl.h" |
44 | ||
7117c2d2 JA |
45 | #define NEED_STRFTIME_DECL /* used in externs.h */ |
46 | ||
726f6388 | 47 | #include "shell.h" |
ac50fbac | 48 | #include "typemax.h" /* SIZE_MAX if needed */ |
ccc6cda3 | 49 | #include "trap.h" |
726f6388 | 50 | #include "flags.h" |
ccc6cda3 JA |
51 | #include "parser.h" |
52 | #include "mailcheck.h" | |
f73dda09 | 53 | #include "test.h" |
95732b49 | 54 | #include "builtins.h" |
ccc6cda3 JA |
55 | #include "builtins/common.h" |
56 | #include "builtins/builtext.h" | |
726f6388 | 57 | |
7117c2d2 JA |
58 | #include "shmbutil.h" |
59 | ||
726f6388 | 60 | #if defined (READLINE) |
ccc6cda3 | 61 | # include "bashline.h" |
726f6388 JA |
62 | # include <readline/readline.h> |
63 | #endif /* READLINE */ | |
64 | ||
65 | #if defined (HISTORY) | |
66 | # include "bashhist.h" | |
67 | # include <readline/history.h> | |
68 | #endif /* HISTORY */ | |
69 | ||
70 | #if defined (JOB_CONTROL) | |
71 | # include "jobs.h" | |
72 | #endif /* JOB_CONTROL */ | |
73 | ||
74 | #if defined (ALIAS) | |
75 | # include "alias.h" | |
b80f6443 JA |
76 | #else |
77 | typedef void *alias_t; | |
726f6388 JA |
78 | #endif /* ALIAS */ |
79 | ||
80 | #if defined (PROMPT_STRING_DECODE) | |
cce855bc JA |
81 | # ifndef _MINIX |
82 | # include <sys/param.h> | |
83 | # endif | |
84 | # include <time.h> | |
7117c2d2 JA |
85 | # if defined (TM_IN_SYS_TIME) |
86 | # include <sys/types.h> | |
87 | # include <sys/time.h> | |
88 | # endif /* TM_IN_SYS_TIME */ | |
cce855bc | 89 | # include "maxpath.h" |
726f6388 JA |
90 | #endif /* PROMPT_STRING_DECODE */ |
91 | ||
ccc6cda3 JA |
92 | #define RE_READ_TOKEN -99 |
93 | #define NO_EXPANSION -100 | |
94 | ||
7117c2d2 JA |
95 | #ifdef DEBUG |
96 | # define YYDEBUG 1 | |
97 | #else | |
98 | # define YYDEBUG 0 | |
99 | #endif | |
100 | ||
101 | #if defined (HANDLE_MULTIBYTE) | |
102 | # define last_shell_getc_is_singlebyte \ | |
103 | ((shell_input_line_index > 1) \ | |
104 | ? shell_input_line_property[shell_input_line_index - 1] \ | |
105 | : 1) | |
106 | # define MBTEST(x) ((x) && last_shell_getc_is_singlebyte) | |
107 | #else | |
108 | # define last_shell_getc_is_singlebyte 1 | |
109 | # define MBTEST(x) ((x)) | |
110 | #endif | |
ccc6cda3 | 111 | |
cce855bc | 112 | #if defined (EXTENDED_GLOB) |
cce855bc JA |
113 | extern int extended_glob; |
114 | #endif | |
115 | ||
726f6388 | 116 | extern int eof_encountered; |
ccc6cda3 | 117 | extern int no_line_editing, running_under_emacs; |
726f6388 | 118 | extern int current_command_number; |
3185942a | 119 | extern int sourcelevel, parse_and_execute_level; |
726f6388 JA |
120 | extern int posixly_correct; |
121 | extern int last_command_exit_value; | |
0001803f | 122 | extern pid_t last_command_subst_pid; |
726f6388 | 123 | extern char *shell_name, *current_host_name; |
ccc6cda3 JA |
124 | extern char *dist_version; |
125 | extern int patch_level; | |
cce855bc | 126 | extern int dump_translatable_strings, dump_po_strings; |
f73dda09 | 127 | extern sh_builtin_func_t *last_shell_builtin, *this_shell_builtin; |
726f6388 JA |
128 | #if defined (BUFFERED_INPUT) |
129 | extern int bash_input_fd_changed; | |
130 | #endif | |
131 | ||
bb70624e | 132 | extern int errno; |
726f6388 JA |
133 | /* **************************************************************** */ |
134 | /* */ | |
135 | /* "Forward" declarations */ | |
136 | /* */ | |
137 | /* **************************************************************** */ | |
138 | ||
f73dda09 JA |
139 | #ifdef DEBUG |
140 | static void debug_parser __P((int)); | |
141 | #endif | |
142 | ||
143 | static int yy_getc __P((void)); | |
144 | static int yy_ungetc __P((int)); | |
145 | ||
146 | #if defined (READLINE) | |
147 | static int yy_readline_get __P((void)); | |
148 | static int yy_readline_unget __P((int)); | |
149 | #endif | |
150 | ||
151 | static int yy_string_get __P((void)); | |
152 | static int yy_string_unget __P((int)); | |
3185942a | 153 | static void rewind_input_string __P((void)); |
f73dda09 JA |
154 | static int yy_stream_get __P((void)); |
155 | static int yy_stream_unget __P((int)); | |
156 | ||
157 | static int shell_getc __P((int)); | |
158 | static void shell_ungetc __P((int)); | |
159 | static void discard_until __P((int)); | |
160 | ||
161 | #if defined (ALIAS) || defined (DPAREN_ARITHMETIC) | |
162 | static void push_string __P((char *, int, alias_t *)); | |
163 | static void pop_string __P((void)); | |
164 | static void free_string_list __P((void)); | |
165 | #endif | |
166 | ||
167 | static char *read_a_line __P((int)); | |
168 | ||
f73dda09 JA |
169 | static int reserved_word_acceptable __P((int)); |
170 | static int yylex __P((void)); | |
90a39f32 CR |
171 | |
172 | static void push_heredoc __P((REDIRECT *)); | |
173 | static char *mk_alexpansion __P((char *)); | |
f73dda09 JA |
174 | static int alias_expand_token __P((char *)); |
175 | static int time_command_acceptable __P((void)); | |
176 | static int special_case_tokens __P((char *)); | |
177 | static int read_token __P((int)); | |
178 | static char *parse_matched_pair __P((int, int, int, int *, int)); | |
3185942a | 179 | static char *parse_comsub __P((int, int, int, int *, int)); |
7117c2d2 JA |
180 | #if defined (ARRAY_VARS) |
181 | static char *parse_compound_assignment __P((int *)); | |
182 | #endif | |
f73dda09 | 183 | #if defined (DPAREN_ARITHMETIC) || defined (ARITH_FOR_COMMAND) |
7117c2d2 | 184 | static int parse_dparen __P((int)); |
b80f6443 | 185 | static int parse_arith_cmd __P((char **, int)); |
f73dda09 | 186 | #endif |
cce855bc | 187 | #if defined (COND_COMMAND) |
7117c2d2 | 188 | static void cond_error __P((void)); |
f73dda09 JA |
189 | static COND_COM *cond_expr __P((void)); |
190 | static COND_COM *cond_or __P((void)); | |
191 | static COND_COM *cond_and __P((void)); | |
192 | static COND_COM *cond_term __P((void)); | |
193 | static int cond_skip_newlines __P((void)); | |
194 | static COMMAND *parse_cond_command __P((void)); | |
cce855bc | 195 | #endif |
7117c2d2 JA |
196 | #if defined (ARRAY_VARS) |
197 | static int token_is_assignment __P((char *, int)); | |
198 | static int token_is_ident __P((char *, int)); | |
199 | #endif | |
f73dda09 JA |
200 | static int read_token_word __P((int)); |
201 | static void discard_parser_constructs __P((int)); | |
726f6388 | 202 | |
7117c2d2 JA |
203 | static char *error_token_from_token __P((int)); |
204 | static char *error_token_from_text __P((void)); | |
205 | static void print_offending_line __P((void)); | |
f73dda09 | 206 | static void report_syntax_error __P((char *)); |
7117c2d2 | 207 | |
f73dda09 JA |
208 | static void handle_eof_input_unit __P((void)); |
209 | static void prompt_again __P((void)); | |
d166f048 | 210 | #if 0 |
f73dda09 | 211 | static void reset_readline_prompt __P((void)); |
d166f048 | 212 | #endif |
f73dda09 | 213 | static void print_prompt __P((void)); |
726f6388 | 214 | |
7117c2d2 JA |
215 | #if defined (HANDLE_MULTIBYTE) |
216 | static void set_line_mbstate __P((void)); | |
217 | static char *shell_input_line_property = NULL; | |
218 | #else | |
219 | # define set_line_mbstate() | |
220 | #endif | |
221 | ||
f73dda09 | 222 | extern int yyerror __P((const char *)); |
d166f048 | 223 | |
7117c2d2 JA |
224 | #ifdef DEBUG |
225 | extern int yydebug; | |
226 | #endif | |
227 | ||
ccc6cda3 JA |
228 | /* Default prompt strings */ |
229 | char *primary_prompt = PPROMPT; | |
230 | char *secondary_prompt = SPROMPT; | |
231 | ||
726f6388 JA |
232 | /* PROMPT_STRING_POINTER points to one of these, never to an actual string. */ |
233 | char *ps1_prompt, *ps2_prompt; | |
234 | ||
235 | /* Handle on the current prompt string. Indirectly points through | |
236 | ps1_ or ps2_prompt. */ | |
237 | char **prompt_string_pointer = (char **)NULL; | |
238 | char *current_prompt_string; | |
239 | ||
ccc6cda3 JA |
240 | /* Non-zero means we expand aliases in commands. */ |
241 | int expand_aliases = 0; | |
242 | ||
243 | /* If non-zero, the decoded prompt string undergoes parameter and | |
244 | variable substitution, command substitution, arithmetic substitution, | |
245 | string expansion, process substitution, and quote removal in | |
246 | decode_prompt_string. */ | |
247 | int promptvars = 1; | |
248 | ||
b80f6443 JA |
249 | /* If non-zero, $'...' and $"..." are expanded when they appear within |
250 | a ${...} expansion, even when the expansion appears within double | |
251 | quotes. */ | |
252 | int extended_quote = 1; | |
253 | ||
726f6388 | 254 | /* The number of lines read from input while creating the current command. */ |
ccc6cda3 | 255 | int current_command_line_count; |
726f6388 | 256 | |
495aee44 CR |
257 | /* The number of lines in a command saved while we run parse_and_execute */ |
258 | int saved_command_line_count; | |
259 | ||
3185942a JA |
260 | /* The token that currently denotes the end of parse. */ |
261 | int shell_eof_token; | |
262 | ||
263 | /* The token currently being read. */ | |
264 | int current_token; | |
265 | ||
0001803f CR |
266 | /* The current parser state. */ |
267 | int parser_state; | |
268 | ||
726f6388 JA |
269 | /* Variables to manage the task of reading here documents, because we need to |
270 | defer the reading until after a complete command has been collected. */ | |
90a39f32 CR |
271 | #define HEREDOC_MAX 16 |
272 | ||
273 | static REDIRECT *redir_stack[HEREDOC_MAX]; | |
ccc6cda3 | 274 | int need_here_doc; |
726f6388 JA |
275 | |
276 | /* Where shell input comes from. History expansion is performed on each | |
277 | line when the shell is interactive. */ | |
278 | static char *shell_input_line = (char *)NULL; | |
ac50fbac CR |
279 | static size_t shell_input_line_index; |
280 | static size_t shell_input_line_size; /* Amount allocated for shell_input_line. */ | |
281 | static size_t shell_input_line_len; /* strlen (shell_input_line) */ | |
726f6388 JA |
282 | |
283 | /* Either zero or EOF. */ | |
ccc6cda3 JA |
284 | static int shell_input_line_terminator; |
285 | ||
286 | /* The line number in a script on which a function definition starts. */ | |
287 | static int function_dstart; | |
288 | ||
289 | /* The line number in a script on which a function body starts. */ | |
290 | static int function_bstart; | |
726f6388 | 291 | |
bb70624e JA |
292 | /* The line number in a script at which an arithmetic for command starts. */ |
293 | static int arith_for_lineno; | |
294 | ||
0001803f CR |
295 | /* The decoded prompt string. Used if READLINE is not defined or if |
296 | editing is turned off. Analogous to current_readline_prompt. */ | |
297 | static char *current_decoded_prompt; | |
3185942a JA |
298 | |
299 | /* The last read token, or NULL. read_token () uses this for context | |
300 | checking. */ | |
301 | static int last_read_token; | |
302 | ||
303 | /* The token read prior to last_read_token. */ | |
304 | static int token_before_that; | |
305 | ||
306 | /* The token read prior to token_before_that. */ | |
307 | static int two_tokens_ago; | |
308 | ||
0001803f CR |
309 | static int global_extglob; |
310 | ||
b80f6443 JA |
311 | /* The line number in a script where the word in a `case WORD', `select WORD' |
312 | or `for WORD' begins. This is a nested command maximum, since the array | |
313 | index is decremented after a case, select, or for command is parsed. */ | |
314 | #define MAX_CASE_NEST 128 | |
90a39f32 | 315 | static int word_lineno[MAX_CASE_NEST+1]; |
b80f6443 JA |
316 | static int word_top = -1; |
317 | ||
318 | /* If non-zero, it is the token that we want read_token to return | |
319 | regardless of what text is (or isn't) present to be read. This | |
320 | is reset by read_token. If token_to_read == WORD or | |
321 | ASSIGNMENT_WORD, yylval.word should be set to word_desc_to_read. */ | |
322 | static int token_to_read; | |
323 | static WORD_DESC *word_desc_to_read; | |
324 | ||
0001803f | 325 | static REDIRECTEE source; |
726f6388 JA |
326 | static REDIRECTEE redir; |
327 | %} | |
328 | ||
329 | %union { | |
330 | WORD_DESC *word; /* the word that we read. */ | |
331 | int number; /* the number that we read. */ | |
332 | WORD_LIST *word_list; | |
333 | COMMAND *command; | |
334 | REDIRECT *redirect; | |
335 | ELEMENT element; | |
336 | PATTERN_LIST *pattern; | |
337 | } | |
338 | ||
339 | /* Reserved words. Members of the first group are only recognized | |
340 | in the case that they are preceded by a list_terminator. Members | |
cce855bc JA |
341 | of the second group are for [[...]] commands. Members of the |
342 | third group are recognized only under special circumstances. */ | |
3185942a | 343 | %token IF THEN ELSE ELIF FI CASE ESAC FOR SELECT WHILE UNTIL DO DONE FUNCTION COPROC |
cce855bc | 344 | %token COND_START COND_END COND_ERROR |
495aee44 | 345 | %token IN BANG TIME TIMEOPT TIMEIGN |
726f6388 JA |
346 | |
347 | /* More general tokens. yylex () knows how to make these. */ | |
0001803f | 348 | %token <word> WORD ASSIGNMENT_WORD REDIR_WORD |
726f6388 | 349 | %token <number> NUMBER |
bb70624e | 350 | %token <word_list> ARITH_CMD ARITH_FOR_EXPRS |
cce855bc | 351 | %token <command> COND_CMD |
7117c2d2 | 352 | %token AND_AND OR_OR GREATER_GREATER LESS_LESS LESS_AND LESS_LESS_LESS |
3185942a JA |
353 | %token GREATER_AND SEMI_SEMI SEMI_AND SEMI_SEMI_AND |
354 | %token LESS_LESS_MINUS AND_GREATER AND_GREATER_GREATER LESS_GREATER | |
355 | %token GREATER_BAR BAR_AND | |
726f6388 JA |
356 | |
357 | /* The types that the various syntactical units return. */ | |
358 | ||
ccc6cda3 JA |
359 | %type <command> inputunit command pipeline pipeline_command |
360 | %type <command> list list0 list1 compound_list simple_list simple_list1 | |
361 | %type <command> simple_command shell_command | |
362 | %type <command> for_command select_command case_command group_command | |
cce855bc JA |
363 | %type <command> arith_command |
364 | %type <command> cond_command | |
bb70624e | 365 | %type <command> arith_for_command |
3185942a | 366 | %type <command> coproc |
28ef6c31 | 367 | %type <command> function_def function_body if_command elif_clause subshell |
ccc6cda3 | 368 | %type <redirect> redirection redirection_list |
726f6388 | 369 | %type <element> simple_command_element |
ccc6cda3 JA |
370 | %type <word_list> word_list pattern |
371 | %type <pattern> pattern_list case_clause_sequence case_clause | |
372 | %type <number> timespec | |
b80f6443 | 373 | %type <number> list_terminator |
726f6388 JA |
374 | |
375 | %start inputunit | |
376 | ||
377 | %left '&' ';' '\n' yacc_EOF | |
378 | %left AND_AND OR_OR | |
3185942a | 379 | %right '|' BAR_AND |
726f6388 JA |
380 | %% |
381 | ||
7117c2d2 | 382 | inputunit: simple_list simple_list_terminator |
726f6388 JA |
383 | { |
384 | /* Case of regular command. Discard the error | |
385 | safety net,and return the command just parsed. */ | |
386 | global_command = $1; | |
387 | eof_encountered = 0; | |
7117c2d2 | 388 | /* discard_parser_constructs (0); */ |
3185942a JA |
389 | if (parser_state & PST_CMDSUBST) |
390 | parser_state |= PST_EOFTOKEN; | |
726f6388 JA |
391 | YYACCEPT; |
392 | } | |
393 | | '\n' | |
394 | { | |
395 | /* Case of regular command, but not a very | |
396 | interesting one. Return a NULL command. */ | |
397 | global_command = (COMMAND *)NULL; | |
3185942a JA |
398 | if (parser_state & PST_CMDSUBST) |
399 | parser_state |= PST_EOFTOKEN; | |
726f6388 JA |
400 | YYACCEPT; |
401 | } | |
ccc6cda3 | 402 | | error '\n' |
726f6388 JA |
403 | { |
404 | /* Error during parsing. Return NULL command. */ | |
405 | global_command = (COMMAND *)NULL; | |
406 | eof_encountered = 0; | |
7117c2d2 | 407 | /* discard_parser_constructs (1); */ |
3185942a | 408 | if (interactive && parse_and_execute_level == 0) |
726f6388 JA |
409 | { |
410 | YYACCEPT; | |
411 | } | |
412 | else | |
413 | { | |
414 | YYABORT; | |
415 | } | |
416 | } | |
417 | | yacc_EOF | |
418 | { | |
ccc6cda3 | 419 | /* Case of EOF seen by itself. Do ignoreeof or |
726f6388 JA |
420 | not. */ |
421 | global_command = (COMMAND *)NULL; | |
422 | handle_eof_input_unit (); | |
423 | YYACCEPT; | |
424 | } | |
425 | ; | |
426 | ||
ccc6cda3 JA |
427 | word_list: WORD |
428 | { $$ = make_word_list ($1, (WORD_LIST *)NULL); } | |
429 | | word_list WORD | |
726f6388 JA |
430 | { $$ = make_word_list ($2, $1); } |
431 | ; | |
432 | ||
433 | redirection: '>' WORD | |
434 | { | |
0001803f | 435 | source.dest = 1; |
726f6388 | 436 | redir.filename = $2; |
0001803f | 437 | $$ = make_redirection (source, r_output_direction, redir, 0); |
726f6388 JA |
438 | } |
439 | | '<' WORD | |
440 | { | |
0001803f | 441 | source.dest = 0; |
726f6388 | 442 | redir.filename = $2; |
0001803f | 443 | $$ = make_redirection (source, r_input_direction, redir, 0); |
726f6388 JA |
444 | } |
445 | | NUMBER '>' WORD | |
446 | { | |
0001803f | 447 | source.dest = $1; |
726f6388 | 448 | redir.filename = $3; |
0001803f | 449 | $$ = make_redirection (source, r_output_direction, redir, 0); |
726f6388 JA |
450 | } |
451 | | NUMBER '<' WORD | |
452 | { | |
0001803f CR |
453 | source.dest = $1; |
454 | redir.filename = $3; | |
455 | $$ = make_redirection (source, r_input_direction, redir, 0); | |
456 | } | |
457 | | REDIR_WORD '>' WORD | |
458 | { | |
459 | source.filename = $1; | |
726f6388 | 460 | redir.filename = $3; |
0001803f CR |
461 | $$ = make_redirection (source, r_output_direction, redir, REDIR_VARASSIGN); |
462 | } | |
463 | | REDIR_WORD '<' WORD | |
464 | { | |
465 | source.filename = $1; | |
466 | redir.filename = $3; | |
467 | $$ = make_redirection (source, r_input_direction, redir, REDIR_VARASSIGN); | |
726f6388 JA |
468 | } |
469 | | GREATER_GREATER WORD | |
470 | { | |
0001803f | 471 | source.dest = 1; |
726f6388 | 472 | redir.filename = $2; |
0001803f | 473 | $$ = make_redirection (source, r_appending_to, redir, 0); |
726f6388 JA |
474 | } |
475 | | NUMBER GREATER_GREATER WORD | |
476 | { | |
0001803f CR |
477 | source.dest = $1; |
478 | redir.filename = $3; | |
479 | $$ = make_redirection (source, r_appending_to, redir, 0); | |
480 | } | |
481 | | REDIR_WORD GREATER_GREATER WORD | |
482 | { | |
483 | source.filename = $1; | |
484 | redir.filename = $3; | |
485 | $$ = make_redirection (source, r_appending_to, redir, REDIR_VARASSIGN); | |
486 | } | |
487 | | GREATER_BAR WORD | |
488 | { | |
489 | source.dest = 1; | |
490 | redir.filename = $2; | |
491 | $$ = make_redirection (source, r_output_force, redir, 0); | |
492 | } | |
493 | | NUMBER GREATER_BAR WORD | |
494 | { | |
495 | source.dest = $1; | |
496 | redir.filename = $3; | |
497 | $$ = make_redirection (source, r_output_force, redir, 0); | |
498 | } | |
499 | | REDIR_WORD GREATER_BAR WORD | |
500 | { | |
501 | source.filename = $1; | |
502 | redir.filename = $3; | |
503 | $$ = make_redirection (source, r_output_force, redir, REDIR_VARASSIGN); | |
504 | } | |
505 | | LESS_GREATER WORD | |
506 | { | |
507 | source.dest = 0; | |
508 | redir.filename = $2; | |
509 | $$ = make_redirection (source, r_input_output, redir, 0); | |
510 | } | |
511 | | NUMBER LESS_GREATER WORD | |
512 | { | |
513 | source.dest = $1; | |
726f6388 | 514 | redir.filename = $3; |
0001803f CR |
515 | $$ = make_redirection (source, r_input_output, redir, 0); |
516 | } | |
517 | | REDIR_WORD LESS_GREATER WORD | |
518 | { | |
519 | source.filename = $1; | |
520 | redir.filename = $3; | |
521 | $$ = make_redirection (source, r_input_output, redir, REDIR_VARASSIGN); | |
726f6388 JA |
522 | } |
523 | | LESS_LESS WORD | |
524 | { | |
0001803f | 525 | source.dest = 0; |
726f6388 | 526 | redir.filename = $2; |
0001803f | 527 | $$ = make_redirection (source, r_reading_until, redir, 0); |
90a39f32 | 528 | push_heredoc ($$); |
726f6388 JA |
529 | } |
530 | | NUMBER LESS_LESS WORD | |
531 | { | |
0001803f CR |
532 | source.dest = $1; |
533 | redir.filename = $3; | |
534 | $$ = make_redirection (source, r_reading_until, redir, 0); | |
90a39f32 | 535 | push_heredoc ($$); |
0001803f CR |
536 | } |
537 | | REDIR_WORD LESS_LESS WORD | |
538 | { | |
539 | source.filename = $1; | |
726f6388 | 540 | redir.filename = $3; |
0001803f | 541 | $$ = make_redirection (source, r_reading_until, redir, REDIR_VARASSIGN); |
90a39f32 | 542 | push_heredoc ($$); |
0001803f CR |
543 | } |
544 | | LESS_LESS_MINUS WORD | |
545 | { | |
546 | source.dest = 0; | |
547 | redir.filename = $2; | |
548 | $$ = make_redirection (source, r_deblank_reading_until, redir, 0); | |
90a39f32 | 549 | push_heredoc ($$); |
0001803f CR |
550 | } |
551 | | NUMBER LESS_LESS_MINUS WORD | |
552 | { | |
553 | source.dest = $1; | |
554 | redir.filename = $3; | |
555 | $$ = make_redirection (source, r_deblank_reading_until, redir, 0); | |
90a39f32 | 556 | push_heredoc ($$); |
0001803f CR |
557 | } |
558 | | REDIR_WORD LESS_LESS_MINUS WORD | |
559 | { | |
560 | source.filename = $1; | |
561 | redir.filename = $3; | |
562 | $$ = make_redirection (source, r_deblank_reading_until, redir, REDIR_VARASSIGN); | |
90a39f32 | 563 | push_heredoc ($$); |
726f6388 | 564 | } |
7117c2d2 JA |
565 | | LESS_LESS_LESS WORD |
566 | { | |
0001803f | 567 | source.dest = 0; |
7117c2d2 | 568 | redir.filename = $2; |
0001803f | 569 | $$ = make_redirection (source, r_reading_string, redir, 0); |
7117c2d2 JA |
570 | } |
571 | | NUMBER LESS_LESS_LESS WORD | |
572 | { | |
0001803f | 573 | source.dest = $1; |
7117c2d2 | 574 | redir.filename = $3; |
0001803f CR |
575 | $$ = make_redirection (source, r_reading_string, redir, 0); |
576 | } | |
577 | | REDIR_WORD LESS_LESS_LESS WORD | |
578 | { | |
579 | source.filename = $1; | |
580 | redir.filename = $3; | |
581 | $$ = make_redirection (source, r_reading_string, redir, REDIR_VARASSIGN); | |
7117c2d2 | 582 | } |
726f6388 JA |
583 | | LESS_AND NUMBER |
584 | { | |
0001803f | 585 | source.dest = 0; |
726f6388 | 586 | redir.dest = $2; |
0001803f | 587 | $$ = make_redirection (source, r_duplicating_input, redir, 0); |
726f6388 JA |
588 | } |
589 | | NUMBER LESS_AND NUMBER | |
590 | { | |
0001803f CR |
591 | source.dest = $1; |
592 | redir.dest = $3; | |
593 | $$ = make_redirection (source, r_duplicating_input, redir, 0); | |
594 | } | |
595 | | REDIR_WORD LESS_AND NUMBER | |
596 | { | |
597 | source.filename = $1; | |
726f6388 | 598 | redir.dest = $3; |
0001803f | 599 | $$ = make_redirection (source, r_duplicating_input, redir, REDIR_VARASSIGN); |
726f6388 JA |
600 | } |
601 | | GREATER_AND NUMBER | |
602 | { | |
0001803f | 603 | source.dest = 1; |
726f6388 | 604 | redir.dest = $2; |
0001803f | 605 | $$ = make_redirection (source, r_duplicating_output, redir, 0); |
726f6388 JA |
606 | } |
607 | | NUMBER GREATER_AND NUMBER | |
608 | { | |
0001803f | 609 | source.dest = $1; |
726f6388 | 610 | redir.dest = $3; |
0001803f CR |
611 | $$ = make_redirection (source, r_duplicating_output, redir, 0); |
612 | } | |
613 | | REDIR_WORD GREATER_AND NUMBER | |
614 | { | |
615 | source.filename = $1; | |
616 | redir.dest = $3; | |
617 | $$ = make_redirection (source, r_duplicating_output, redir, REDIR_VARASSIGN); | |
726f6388 JA |
618 | } |
619 | | LESS_AND WORD | |
620 | { | |
0001803f | 621 | source.dest = 0; |
726f6388 | 622 | redir.filename = $2; |
0001803f | 623 | $$ = make_redirection (source, r_duplicating_input_word, redir, 0); |
726f6388 JA |
624 | } |
625 | | NUMBER LESS_AND WORD | |
626 | { | |
0001803f CR |
627 | source.dest = $1; |
628 | redir.filename = $3; | |
629 | $$ = make_redirection (source, r_duplicating_input_word, redir, 0); | |
630 | } | |
631 | | REDIR_WORD LESS_AND WORD | |
632 | { | |
633 | source.filename = $1; | |
726f6388 | 634 | redir.filename = $3; |
0001803f | 635 | $$ = make_redirection (source, r_duplicating_input_word, redir, REDIR_VARASSIGN); |
726f6388 JA |
636 | } |
637 | | GREATER_AND WORD | |
638 | { | |
0001803f | 639 | source.dest = 1; |
726f6388 | 640 | redir.filename = $2; |
0001803f | 641 | $$ = make_redirection (source, r_duplicating_output_word, redir, 0); |
726f6388 JA |
642 | } |
643 | | NUMBER GREATER_AND WORD | |
644 | { | |
0001803f | 645 | source.dest = $1; |
726f6388 | 646 | redir.filename = $3; |
0001803f | 647 | $$ = make_redirection (source, r_duplicating_output_word, redir, 0); |
726f6388 | 648 | } |
0001803f | 649 | | REDIR_WORD GREATER_AND WORD |
726f6388 | 650 | { |
0001803f | 651 | source.filename = $1; |
726f6388 | 652 | redir.filename = $3; |
0001803f | 653 | $$ = make_redirection (source, r_duplicating_output_word, redir, REDIR_VARASSIGN); |
726f6388 JA |
654 | } |
655 | | GREATER_AND '-' | |
656 | { | |
0001803f | 657 | source.dest = 1; |
f73dda09 | 658 | redir.dest = 0; |
0001803f | 659 | $$ = make_redirection (source, r_close_this, redir, 0); |
726f6388 JA |
660 | } |
661 | | NUMBER GREATER_AND '-' | |
662 | { | |
0001803f | 663 | source.dest = $1; |
f73dda09 | 664 | redir.dest = 0; |
0001803f | 665 | $$ = make_redirection (source, r_close_this, redir, 0); |
726f6388 | 666 | } |
0001803f | 667 | | REDIR_WORD GREATER_AND '-' |
726f6388 | 668 | { |
0001803f | 669 | source.filename = $1; |
f73dda09 | 670 | redir.dest = 0; |
0001803f | 671 | $$ = make_redirection (source, r_close_this, redir, REDIR_VARASSIGN); |
726f6388 | 672 | } |
0001803f | 673 | | LESS_AND '-' |
726f6388 | 674 | { |
0001803f | 675 | source.dest = 0; |
f73dda09 | 676 | redir.dest = 0; |
0001803f | 677 | $$ = make_redirection (source, r_close_this, redir, 0); |
726f6388 | 678 | } |
0001803f | 679 | | NUMBER LESS_AND '-' |
3185942a | 680 | { |
0001803f CR |
681 | source.dest = $1; |
682 | redir.dest = 0; | |
683 | $$ = make_redirection (source, r_close_this, redir, 0); | |
3185942a | 684 | } |
0001803f | 685 | | REDIR_WORD LESS_AND '-' |
726f6388 | 686 | { |
0001803f CR |
687 | source.filename = $1; |
688 | redir.dest = 0; | |
689 | $$ = make_redirection (source, r_close_this, redir, REDIR_VARASSIGN); | |
726f6388 | 690 | } |
0001803f | 691 | | AND_GREATER WORD |
726f6388 | 692 | { |
0001803f | 693 | source.dest = 1; |
726f6388 | 694 | redir.filename = $2; |
0001803f | 695 | $$ = make_redirection (source, r_err_and_out, redir, 0); |
ccc6cda3 | 696 | } |
0001803f | 697 | | AND_GREATER_GREATER WORD |
726f6388 | 698 | { |
0001803f | 699 | source.dest = 1; |
726f6388 | 700 | redir.filename = $2; |
0001803f | 701 | $$ = make_redirection (source, r_append_err_and_out, redir, 0); |
726f6388 JA |
702 | } |
703 | ; | |
704 | ||
705 | simple_command_element: WORD | |
706 | { $$.word = $1; $$.redirect = 0; } | |
707 | | ASSIGNMENT_WORD | |
708 | { $$.word = $1; $$.redirect = 0; } | |
709 | | redirection | |
710 | { $$.redirect = $1; $$.word = 0; } | |
711 | ; | |
712 | ||
ccc6cda3 | 713 | redirection_list: redirection |
726f6388 JA |
714 | { |
715 | $$ = $1; | |
716 | } | |
ccc6cda3 JA |
717 | | redirection_list redirection |
718 | { | |
719 | register REDIRECT *t; | |
726f6388 | 720 | |
ccc6cda3 JA |
721 | for (t = $1; t->next; t = t->next) |
722 | ; | |
723 | t->next = $2; | |
726f6388 JA |
724 | $$ = $1; |
725 | } | |
726 | ; | |
727 | ||
728 | simple_command: simple_command_element | |
729 | { $$ = make_simple_command ($1, (COMMAND *)NULL); } | |
730 | | simple_command simple_command_element | |
731 | { $$ = make_simple_command ($2, $1); } | |
732 | ; | |
733 | ||
734 | command: simple_command | |
735 | { $$ = clean_simple_command ($1); } | |
736 | | shell_command | |
737 | { $$ = $1; } | |
ccc6cda3 | 738 | | shell_command redirection_list |
726f6388 | 739 | { |
ccc6cda3 JA |
740 | COMMAND *tc; |
741 | ||
742 | tc = $1; | |
ccc6cda3 | 743 | if (tc->redirects) |
726f6388 JA |
744 | { |
745 | register REDIRECT *t; | |
ccc6cda3 | 746 | for (t = tc->redirects; t->next; t = t->next) |
726f6388 JA |
747 | ; |
748 | t->next = $2; | |
749 | } | |
750 | else | |
ccc6cda3 | 751 | tc->redirects = $2; |
726f6388 JA |
752 | $$ = $1; |
753 | } | |
28ef6c31 JA |
754 | | function_def |
755 | { $$ = $1; } | |
3185942a JA |
756 | | coproc |
757 | { $$ = $1; } | |
726f6388 JA |
758 | ; |
759 | ||
ccc6cda3 JA |
760 | shell_command: for_command |
761 | { $$ = $1; } | |
762 | | case_command | |
763 | { $$ = $1; } | |
764 | | WHILE compound_list DO compound_list DONE | |
726f6388 | 765 | { $$ = make_while_command ($2, $4); } |
ccc6cda3 | 766 | | UNTIL compound_list DO compound_list DONE |
726f6388 JA |
767 | { $$ = make_until_command ($2, $4); } |
768 | | select_command | |
769 | { $$ = $1; } | |
770 | | if_command | |
771 | { $$ = $1; } | |
772 | | subshell | |
773 | { $$ = $1; } | |
774 | | group_command | |
775 | { $$ = $1; } | |
cce855bc JA |
776 | | arith_command |
777 | { $$ = $1; } | |
778 | | cond_command | |
779 | { $$ = $1; } | |
bb70624e JA |
780 | | arith_for_command |
781 | { $$ = $1; } | |
726f6388 JA |
782 | ; |
783 | ||
d166f048 | 784 | for_command: FOR WORD newline_list DO compound_list DONE |
b80f6443 JA |
785 | { |
786 | $$ = make_for_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $5, word_lineno[word_top]); | |
787 | if (word_top > 0) word_top--; | |
788 | } | |
d166f048 | 789 | | FOR WORD newline_list '{' compound_list '}' |
b80f6443 JA |
790 | { |
791 | $$ = make_for_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $5, word_lineno[word_top]); | |
792 | if (word_top > 0) word_top--; | |
793 | } | |
d166f048 | 794 | | FOR WORD ';' newline_list DO compound_list DONE |
b80f6443 JA |
795 | { |
796 | $$ = make_for_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $6, word_lineno[word_top]); | |
797 | if (word_top > 0) word_top--; | |
798 | } | |
d166f048 | 799 | | FOR WORD ';' newline_list '{' compound_list '}' |
b80f6443 JA |
800 | { |
801 | $$ = make_for_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $6, word_lineno[word_top]); | |
802 | if (word_top > 0) word_top--; | |
803 | } | |
d166f048 | 804 | | FOR WORD newline_list IN word_list list_terminator newline_list DO compound_list DONE |
b80f6443 JA |
805 | { |
806 | $$ = make_for_command ($2, REVERSE_LIST ($5, WORD_LIST *), $9, word_lineno[word_top]); | |
807 | if (word_top > 0) word_top--; | |
808 | } | |
d166f048 | 809 | | FOR WORD newline_list IN word_list list_terminator newline_list '{' compound_list '}' |
b80f6443 JA |
810 | { |
811 | $$ = make_for_command ($2, REVERSE_LIST ($5, WORD_LIST *), $9, word_lineno[word_top]); | |
812 | if (word_top > 0) word_top--; | |
813 | } | |
f73dda09 | 814 | | FOR WORD newline_list IN list_terminator newline_list DO compound_list DONE |
b80f6443 JA |
815 | { |
816 | $$ = make_for_command ($2, (WORD_LIST *)NULL, $8, word_lineno[word_top]); | |
817 | if (word_top > 0) word_top--; | |
818 | } | |
f73dda09 | 819 | | FOR WORD newline_list IN list_terminator newline_list '{' compound_list '}' |
b80f6443 JA |
820 | { |
821 | $$ = make_for_command ($2, (WORD_LIST *)NULL, $8, word_lineno[word_top]); | |
822 | if (word_top > 0) word_top--; | |
823 | } | |
ccc6cda3 JA |
824 | ; |
825 | ||
bb70624e | 826 | arith_for_command: FOR ARITH_FOR_EXPRS list_terminator newline_list DO compound_list DONE |
b80f6443 JA |
827 | { |
828 | $$ = make_arith_for_command ($2, $6, arith_for_lineno); | |
829 | if (word_top > 0) word_top--; | |
830 | } | |
bb70624e | 831 | | FOR ARITH_FOR_EXPRS list_terminator newline_list '{' compound_list '}' |
b80f6443 JA |
832 | { |
833 | $$ = make_arith_for_command ($2, $6, arith_for_lineno); | |
834 | if (word_top > 0) word_top--; | |
835 | } | |
28ef6c31 | 836 | | FOR ARITH_FOR_EXPRS DO compound_list DONE |
b80f6443 JA |
837 | { |
838 | $$ = make_arith_for_command ($2, $4, arith_for_lineno); | |
839 | if (word_top > 0) word_top--; | |
840 | } | |
28ef6c31 | 841 | | FOR ARITH_FOR_EXPRS '{' compound_list '}' |
b80f6443 JA |
842 | { |
843 | $$ = make_arith_for_command ($2, $4, arith_for_lineno); | |
844 | if (word_top > 0) word_top--; | |
845 | } | |
bb70624e | 846 | ; |
28ef6c31 | 847 | |
ccc6cda3 | 848 | select_command: SELECT WORD newline_list DO list DONE |
726f6388 | 849 | { |
b80f6443 JA |
850 | $$ = make_select_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $5, word_lineno[word_top]); |
851 | if (word_top > 0) word_top--; | |
726f6388 | 852 | } |
ccc6cda3 | 853 | | SELECT WORD newline_list '{' list '}' |
726f6388 | 854 | { |
b80f6443 JA |
855 | $$ = make_select_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $5, word_lineno[word_top]); |
856 | if (word_top > 0) word_top--; | |
726f6388 | 857 | } |
ccc6cda3 | 858 | | SELECT WORD ';' newline_list DO list DONE |
726f6388 | 859 | { |
b80f6443 JA |
860 | $$ = make_select_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $6, word_lineno[word_top]); |
861 | if (word_top > 0) word_top--; | |
726f6388 | 862 | } |
ccc6cda3 | 863 | | SELECT WORD ';' newline_list '{' list '}' |
726f6388 | 864 | { |
b80f6443 JA |
865 | $$ = make_select_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $6, word_lineno[word_top]); |
866 | if (word_top > 0) word_top--; | |
726f6388 | 867 | } |
ccc6cda3 | 868 | | SELECT WORD newline_list IN word_list list_terminator newline_list DO list DONE |
726f6388 | 869 | { |
b80f6443 JA |
870 | $$ = make_select_command ($2, REVERSE_LIST ($5, WORD_LIST *), $9, word_lineno[word_top]); |
871 | if (word_top > 0) word_top--; | |
726f6388 | 872 | } |
ccc6cda3 | 873 | | SELECT WORD newline_list IN word_list list_terminator newline_list '{' list '}' |
726f6388 | 874 | { |
b80f6443 JA |
875 | $$ = make_select_command ($2, REVERSE_LIST ($5, WORD_LIST *), $9, word_lineno[word_top]); |
876 | if (word_top > 0) word_top--; | |
726f6388 JA |
877 | } |
878 | ; | |
879 | ||
ccc6cda3 | 880 | case_command: CASE WORD newline_list IN newline_list ESAC |
b80f6443 JA |
881 | { |
882 | $$ = make_case_command ($2, (PATTERN_LIST *)NULL, word_lineno[word_top]); | |
883 | if (word_top > 0) word_top--; | |
884 | } | |
ccc6cda3 | 885 | | CASE WORD newline_list IN case_clause_sequence newline_list ESAC |
b80f6443 JA |
886 | { |
887 | $$ = make_case_command ($2, $5, word_lineno[word_top]); | |
888 | if (word_top > 0) word_top--; | |
889 | } | |
ccc6cda3 | 890 | | CASE WORD newline_list IN case_clause ESAC |
b80f6443 JA |
891 | { |
892 | $$ = make_case_command ($2, $5, word_lineno[word_top]); | |
893 | if (word_top > 0) word_top--; | |
894 | } | |
ccc6cda3 | 895 | ; |
726f6388 | 896 | |
28ef6c31 | 897 | function_def: WORD '(' ')' newline_list function_body |
ccc6cda3 | 898 | { $$ = make_function_def ($1, $5, function_dstart, function_bstart); } |
726f6388 | 899 | |
28ef6c31 | 900 | | FUNCTION WORD '(' ')' newline_list function_body |
ccc6cda3 | 901 | { $$ = make_function_def ($2, $6, function_dstart, function_bstart); } |
726f6388 | 902 | |
28ef6c31 | 903 | | FUNCTION WORD newline_list function_body |
ccc6cda3 | 904 | { $$ = make_function_def ($2, $4, function_dstart, function_bstart); } |
726f6388 JA |
905 | ; |
906 | ||
28ef6c31 JA |
907 | function_body: shell_command |
908 | { $$ = $1; } | |
909 | | shell_command redirection_list | |
910 | { | |
911 | COMMAND *tc; | |
912 | ||
913 | tc = $1; | |
914 | /* According to Posix.2 3.9.5, redirections | |
915 | specified after the body of a function should | |
916 | be attached to the function and performed when | |
917 | the function is executed, not as part of the | |
918 | function definition command. */ | |
919 | /* XXX - I don't think it matters, but we might | |
920 | want to change this in the future to avoid | |
921 | problems differentiating between a function | |
922 | definition with a redirection and a function | |
923 | definition containing a single command with a | |
924 | redirection. The two are semantically equivalent, | |
925 | though -- the only difference is in how the | |
926 | command printing code displays the redirections. */ | |
927 | if (tc->redirects) | |
928 | { | |
929 | register REDIRECT *t; | |
930 | for (t = tc->redirects; t->next; t = t->next) | |
931 | ; | |
932 | t->next = $2; | |
933 | } | |
934 | else | |
935 | tc->redirects = $2; | |
936 | $$ = $1; | |
937 | } | |
938 | ; | |
939 | ||
ccc6cda3 | 940 | subshell: '(' compound_list ')' |
bb70624e JA |
941 | { |
942 | $$ = make_subshell_command ($2); | |
943 | $$->flags |= CMD_WANT_SUBSHELL; | |
944 | } | |
726f6388 | 945 | ; |
ccc6cda3 | 946 | |
3185942a JA |
947 | coproc: COPROC shell_command |
948 | { | |
949 | $$ = make_coproc_command ("COPROC", $2); | |
950 | $$->flags |= CMD_WANT_SUBSHELL|CMD_COPROC_SUBSHELL; | |
951 | } | |
952 | | COPROC shell_command redirection_list | |
953 | { | |
954 | COMMAND *tc; | |
955 | ||
956 | tc = $2; | |
957 | if (tc->redirects) | |
958 | { | |
959 | register REDIRECT *t; | |
960 | for (t = tc->redirects; t->next; t = t->next) | |
961 | ; | |
962 | t->next = $3; | |
963 | } | |
964 | else | |
965 | tc->redirects = $3; | |
966 | $$ = make_coproc_command ("COPROC", $2); | |
967 | $$->flags |= CMD_WANT_SUBSHELL|CMD_COPROC_SUBSHELL; | |
968 | } | |
969 | | COPROC WORD shell_command | |
970 | { | |
971 | $$ = make_coproc_command ($2->word, $3); | |
972 | $$->flags |= CMD_WANT_SUBSHELL|CMD_COPROC_SUBSHELL; | |
973 | } | |
974 | | COPROC WORD shell_command redirection_list | |
975 | { | |
976 | COMMAND *tc; | |
977 | ||
978 | tc = $3; | |
979 | if (tc->redirects) | |
980 | { | |
981 | register REDIRECT *t; | |
982 | for (t = tc->redirects; t->next; t = t->next) | |
983 | ; | |
984 | t->next = $4; | |
985 | } | |
986 | else | |
987 | tc->redirects = $4; | |
988 | $$ = make_coproc_command ($2->word, $3); | |
989 | $$->flags |= CMD_WANT_SUBSHELL|CMD_COPROC_SUBSHELL; | |
990 | } | |
991 | | COPROC simple_command | |
992 | { | |
993 | $$ = make_coproc_command ("COPROC", clean_simple_command ($2)); | |
994 | $$->flags |= CMD_WANT_SUBSHELL|CMD_COPROC_SUBSHELL; | |
995 | } | |
996 | ; | |
997 | ||
ccc6cda3 | 998 | if_command: IF compound_list THEN compound_list FI |
726f6388 | 999 | { $$ = make_if_command ($2, $4, (COMMAND *)NULL); } |
ccc6cda3 | 1000 | | IF compound_list THEN compound_list ELSE compound_list FI |
726f6388 | 1001 | { $$ = make_if_command ($2, $4, $6); } |
ccc6cda3 | 1002 | | IF compound_list THEN compound_list elif_clause FI |
726f6388 JA |
1003 | { $$ = make_if_command ($2, $4, $5); } |
1004 | ; | |
1005 | ||
1006 | ||
28ef6c31 | 1007 | group_command: '{' compound_list '}' |
726f6388 JA |
1008 | { $$ = make_group_command ($2); } |
1009 | ; | |
1010 | ||
cce855bc JA |
1011 | arith_command: ARITH_CMD |
1012 | { $$ = make_arith_command ($1); } | |
1013 | ; | |
1014 | ||
1015 | cond_command: COND_START COND_CMD COND_END | |
1016 | { $$ = $2; } | |
1017 | ; | |
1018 | ||
ccc6cda3 | 1019 | elif_clause: ELIF compound_list THEN compound_list |
726f6388 | 1020 | { $$ = make_if_command ($2, $4, (COMMAND *)NULL); } |
ccc6cda3 | 1021 | | ELIF compound_list THEN compound_list ELSE compound_list |
726f6388 | 1022 | { $$ = make_if_command ($2, $4, $6); } |
ccc6cda3 | 1023 | | ELIF compound_list THEN compound_list elif_clause |
726f6388 JA |
1024 | { $$ = make_if_command ($2, $4, $5); } |
1025 | ; | |
1026 | ||
ccc6cda3 JA |
1027 | case_clause: pattern_list |
1028 | | case_clause_sequence pattern_list | |
726f6388 JA |
1029 | { $2->next = $1; $$ = $2; } |
1030 | ; | |
1031 | ||
ccc6cda3 | 1032 | pattern_list: newline_list pattern ')' compound_list |
726f6388 | 1033 | { $$ = make_pattern_list ($2, $4); } |
ccc6cda3 | 1034 | | newline_list pattern ')' newline_list |
726f6388 | 1035 | { $$ = make_pattern_list ($2, (COMMAND *)NULL); } |
ccc6cda3 | 1036 | | newline_list '(' pattern ')' compound_list |
726f6388 | 1037 | { $$ = make_pattern_list ($3, $5); } |
ccc6cda3 | 1038 | | newline_list '(' pattern ')' newline_list |
726f6388 JA |
1039 | { $$ = make_pattern_list ($3, (COMMAND *)NULL); } |
1040 | ; | |
1041 | ||
ccc6cda3 | 1042 | case_clause_sequence: pattern_list SEMI_SEMI |
3185942a | 1043 | { $$ = $1; } |
ccc6cda3 | 1044 | | case_clause_sequence pattern_list SEMI_SEMI |
726f6388 | 1045 | { $2->next = $1; $$ = $2; } |
3185942a JA |
1046 | | pattern_list SEMI_AND |
1047 | { $1->flags |= CASEPAT_FALLTHROUGH; $$ = $1; } | |
1048 | | case_clause_sequence pattern_list SEMI_AND | |
1049 | { $2->flags |= CASEPAT_FALLTHROUGH; $2->next = $1; $$ = $2; } | |
1050 | | pattern_list SEMI_SEMI_AND | |
1051 | { $1->flags |= CASEPAT_TESTNEXT; $$ = $1; } | |
1052 | | case_clause_sequence pattern_list SEMI_SEMI_AND | |
1053 | { $2->flags |= CASEPAT_TESTNEXT; $2->next = $1; $$ = $2; } | |
726f6388 JA |
1054 | ; |
1055 | ||
726f6388 JA |
1056 | pattern: WORD |
1057 | { $$ = make_word_list ($1, (WORD_LIST *)NULL); } | |
1058 | | pattern '|' WORD | |
1059 | { $$ = make_word_list ($3, $1); } | |
1060 | ; | |
1061 | ||
1062 | /* A list allows leading or trailing newlines and | |
1063 | newlines as operators (equivalent to semicolons). | |
1064 | It must end with a newline or semicolon. | |
1065 | Lists are used within commands such as if, for, while. */ | |
1066 | ||
ccc6cda3 | 1067 | list: newline_list list0 |
726f6388 JA |
1068 | { |
1069 | $$ = $2; | |
1070 | if (need_here_doc) | |
1071 | gather_here_documents (); | |
1072 | } | |
1073 | ; | |
1074 | ||
ccc6cda3 JA |
1075 | compound_list: list |
1076 | | newline_list list1 | |
1077 | { | |
1078 | $$ = $2; | |
1079 | } | |
1080 | ; | |
1081 | ||
1082 | list0: list1 '\n' newline_list | |
1083 | | list1 '&' newline_list | |
726f6388 JA |
1084 | { |
1085 | if ($1->type == cm_connection) | |
1086 | $$ = connect_async_list ($1, (COMMAND *)NULL, '&'); | |
1087 | else | |
1088 | $$ = command_connect ($1, (COMMAND *)NULL, '&'); | |
1089 | } | |
ccc6cda3 | 1090 | | list1 ';' newline_list |
726f6388 JA |
1091 | |
1092 | ; | |
1093 | ||
ccc6cda3 | 1094 | list1: list1 AND_AND newline_list list1 |
726f6388 | 1095 | { $$ = command_connect ($1, $4, AND_AND); } |
ccc6cda3 | 1096 | | list1 OR_OR newline_list list1 |
726f6388 | 1097 | { $$ = command_connect ($1, $4, OR_OR); } |
ccc6cda3 | 1098 | | list1 '&' newline_list list1 |
726f6388 JA |
1099 | { |
1100 | if ($1->type == cm_connection) | |
1101 | $$ = connect_async_list ($1, $4, '&'); | |
1102 | else | |
1103 | $$ = command_connect ($1, $4, '&'); | |
1104 | } | |
ccc6cda3 | 1105 | | list1 ';' newline_list list1 |
726f6388 | 1106 | { $$ = command_connect ($1, $4, ';'); } |
ccc6cda3 | 1107 | | list1 '\n' newline_list list1 |
726f6388 | 1108 | { $$ = command_connect ($1, $4, ';'); } |
ccc6cda3 | 1109 | | pipeline_command |
726f6388 | 1110 | { $$ = $1; } |
726f6388 JA |
1111 | ; |
1112 | ||
7117c2d2 JA |
1113 | simple_list_terminator: '\n' |
1114 | | yacc_EOF | |
1115 | ; | |
1116 | ||
726f6388 | 1117 | list_terminator:'\n' |
b80f6443 | 1118 | { $$ = '\n'; } |
726f6388 | 1119 | | ';' |
b80f6443 | 1120 | { $$ = ';'; } |
726f6388 | 1121 | | yacc_EOF |
b80f6443 | 1122 | { $$ = yacc_EOF; } |
726f6388 JA |
1123 | ; |
1124 | ||
ccc6cda3 JA |
1125 | newline_list: |
1126 | | newline_list '\n' | |
726f6388 JA |
1127 | ; |
1128 | ||
1129 | /* A simple_list is a list that contains no significant newlines | |
1130 | and no leading or trailing newlines. Newlines are allowed | |
1131 | only following operators, where they are not significant. | |
1132 | ||
1133 | This is what an inputunit consists of. */ | |
1134 | ||
1135 | simple_list: simple_list1 | |
1136 | { | |
1137 | $$ = $1; | |
1138 | if (need_here_doc) | |
1139 | gather_here_documents (); | |
3185942a JA |
1140 | if ((parser_state & PST_CMDSUBST) && current_token == shell_eof_token) |
1141 | { | |
1142 | global_command = $1; | |
1143 | eof_encountered = 0; | |
1144 | rewind_input_string (); | |
1145 | YYACCEPT; | |
1146 | } | |
726f6388 JA |
1147 | } |
1148 | | simple_list1 '&' | |
1149 | { | |
1150 | if ($1->type == cm_connection) | |
1151 | $$ = connect_async_list ($1, (COMMAND *)NULL, '&'); | |
1152 | else | |
1153 | $$ = command_connect ($1, (COMMAND *)NULL, '&'); | |
1154 | if (need_here_doc) | |
1155 | gather_here_documents (); | |
3185942a JA |
1156 | if ((parser_state & PST_CMDSUBST) && current_token == shell_eof_token) |
1157 | { | |
1158 | global_command = $1; | |
1159 | eof_encountered = 0; | |
1160 | rewind_input_string (); | |
1161 | YYACCEPT; | |
1162 | } | |
726f6388 JA |
1163 | } |
1164 | | simple_list1 ';' | |
1165 | { | |
1166 | $$ = $1; | |
1167 | if (need_here_doc) | |
1168 | gather_here_documents (); | |
3185942a JA |
1169 | if ((parser_state & PST_CMDSUBST) && current_token == shell_eof_token) |
1170 | { | |
1171 | global_command = $1; | |
1172 | eof_encountered = 0; | |
1173 | rewind_input_string (); | |
1174 | YYACCEPT; | |
1175 | } | |
726f6388 JA |
1176 | } |
1177 | ; | |
1178 | ||
ccc6cda3 | 1179 | simple_list1: simple_list1 AND_AND newline_list simple_list1 |
726f6388 | 1180 | { $$ = command_connect ($1, $4, AND_AND); } |
ccc6cda3 | 1181 | | simple_list1 OR_OR newline_list simple_list1 |
726f6388 JA |
1182 | { $$ = command_connect ($1, $4, OR_OR); } |
1183 | | simple_list1 '&' simple_list1 | |
1184 | { | |
1185 | if ($1->type == cm_connection) | |
1186 | $$ = connect_async_list ($1, $3, '&'); | |
1187 | else | |
1188 | $$ = command_connect ($1, $3, '&'); | |
1189 | } | |
1190 | | simple_list1 ';' simple_list1 | |
1191 | { $$ = command_connect ($1, $3, ';'); } | |
ccc6cda3 JA |
1192 | |
1193 | | pipeline_command | |
1194 | { $$ = $1; } | |
1195 | ; | |
1196 | ||
1197 | pipeline_command: pipeline | |
495aee44 CR |
1198 | { $$ = $1; } |
1199 | | BANG pipeline_command | |
726f6388 | 1200 | { |
95732b49 | 1201 | if ($2) |
495aee44 | 1202 | $2->flags ^= CMD_INVERT_RETURN; /* toggle */ |
726f6388 JA |
1203 | $$ = $2; |
1204 | } | |
495aee44 | 1205 | | timespec pipeline_command |
ccc6cda3 | 1206 | { |
95732b49 JA |
1207 | if ($2) |
1208 | $2->flags |= $1; | |
ccc6cda3 JA |
1209 | $$ = $2; |
1210 | } | |
b80f6443 JA |
1211 | | timespec list_terminator |
1212 | { | |
1213 | ELEMENT x; | |
1214 | ||
1215 | /* Boy, this is unclean. `time' by itself can | |
1216 | time a null command. We cheat and push a | |
1217 | newline back if the list_terminator was a newline | |
1218 | to avoid the double-newline problem (one to | |
1219 | terminate this, one to terminate the command) */ | |
1220 | x.word = 0; | |
1221 | x.redirect = 0; | |
1222 | $$ = make_simple_command (x, (COMMAND *)NULL); | |
1223 | $$->flags |= $1; | |
1224 | /* XXX - let's cheat and push a newline back */ | |
1225 | if ($2 == '\n') | |
1226 | token_to_read = '\n'; | |
1227 | } | |
495aee44 CR |
1228 | | BANG list_terminator |
1229 | { | |
1230 | ELEMENT x; | |
1231 | ||
1232 | /* This is just as unclean. Posix says that `!' | |
1233 | by itself should be equivalent to `false'. | |
1234 | We cheat and push a | |
1235 | newline back if the list_terminator was a newline | |
1236 | to avoid the double-newline problem (one to | |
1237 | terminate this, one to terminate the command) */ | |
1238 | x.word = 0; | |
1239 | x.redirect = 0; | |
1240 | $$ = make_simple_command (x, (COMMAND *)NULL); | |
1241 | $$->flags |= CMD_INVERT_RETURN; | |
1242 | /* XXX - let's cheat and push a newline back */ | |
1243 | if ($2 == '\n') | |
1244 | token_to_read = '\n'; | |
1245 | } | |
726f6388 JA |
1246 | ; |
1247 | ||
3185942a | 1248 | pipeline: pipeline '|' newline_list pipeline |
726f6388 | 1249 | { $$ = command_connect ($1, $4, '|'); } |
3185942a JA |
1250 | | pipeline BAR_AND newline_list pipeline |
1251 | { | |
1252 | /* Make cmd1 |& cmd2 equivalent to cmd1 2>&1 | cmd2 */ | |
1253 | COMMAND *tc; | |
0001803f | 1254 | REDIRECTEE rd, sd; |
3185942a JA |
1255 | REDIRECT *r; |
1256 | ||
89a92869 | 1257 | tc = $1->type == cm_simple ? (COMMAND *)$1->value.Simple : $1; |
0001803f | 1258 | sd.dest = 2; |
3185942a | 1259 | rd.dest = 1; |
0001803f | 1260 | r = make_redirection (sd, r_duplicating_output, rd, 0); |
3185942a JA |
1261 | if (tc->redirects) |
1262 | { | |
1263 | register REDIRECT *t; | |
1264 | for (t = tc->redirects; t->next; t = t->next) | |
1265 | ; | |
1266 | t->next = r; | |
1267 | } | |
1268 | else | |
1269 | tc->redirects = r; | |
1270 | ||
1271 | $$ = command_connect ($1, $4, '|'); | |
1272 | } | |
726f6388 JA |
1273 | | command |
1274 | { $$ = $1; } | |
1275 | ; | |
ccc6cda3 JA |
1276 | |
1277 | timespec: TIME | |
1278 | { $$ = CMD_TIME_PIPELINE; } | |
1279 | | TIME TIMEOPT | |
1280 | { $$ = CMD_TIME_PIPELINE|CMD_TIME_POSIX; } | |
495aee44 CR |
1281 | | TIME TIMEOPT TIMEIGN |
1282 | { $$ = CMD_TIME_PIPELINE|CMD_TIME_POSIX; } | |
ccc6cda3 | 1283 | ; |
726f6388 JA |
1284 | %% |
1285 | ||
1286 | /* Initial size to allocate for tokens, and the | |
1287 | amount to grow them by. */ | |
d166f048 | 1288 | #define TOKEN_DEFAULT_INITIAL_SIZE 496 |
726f6388 JA |
1289 | #define TOKEN_DEFAULT_GROW_SIZE 512 |
1290 | ||
b80f6443 JA |
1291 | /* Should we call prompt_again? */ |
1292 | #define SHOULD_PROMPT() \ | |
1293 | (interactive && (bash_input.type == st_stdin || bash_input.type == st_stream)) | |
1294 | ||
1295 | #if defined (ALIAS) | |
1296 | # define expanding_alias() (pushed_string_list && pushed_string_list->expander) | |
1297 | #else | |
1298 | # define expanding_alias() 0 | |
1299 | #endif | |
1300 | ||
726f6388 JA |
1301 | /* Global var is non-zero when end of file has been reached. */ |
1302 | int EOF_Reached = 0; | |
1303 | ||
f73dda09 JA |
1304 | #ifdef DEBUG |
1305 | static void | |
ccc6cda3 JA |
1306 | debug_parser (i) |
1307 | int i; | |
1308 | { | |
1309 | #if YYDEBUG != 0 | |
1310 | yydebug = i; | |
1311 | #endif | |
1312 | } | |
f73dda09 | 1313 | #endif |
ccc6cda3 | 1314 | |
726f6388 JA |
1315 | /* yy_getc () returns the next available character from input or EOF. |
1316 | yy_ungetc (c) makes `c' the next character to read. | |
1317 | init_yy_io (get, unget, type, location) makes the function GET the | |
1318 | installed function for getting the next character, makes UNGET the | |
1319 | installed function for un-getting a character, sets the type of stream | |
1320 | (either string or file) from TYPE, and makes LOCATION point to where | |
1321 | the input is coming from. */ | |
1322 | ||
1323 | /* Unconditionally returns end-of-file. */ | |
ccc6cda3 | 1324 | int |
726f6388 JA |
1325 | return_EOF () |
1326 | { | |
1327 | return (EOF); | |
1328 | } | |
1329 | ||
1330 | /* Variable containing the current get and unget functions. | |
1331 | See ./input.h for a clearer description. */ | |
1332 | BASH_INPUT bash_input; | |
1333 | ||
ccc6cda3 JA |
1334 | /* Set all of the fields in BASH_INPUT to NULL. Free bash_input.name if it |
1335 | is non-null, avoiding a memory leak. */ | |
726f6388 JA |
1336 | void |
1337 | initialize_bash_input () | |
1338 | { | |
ccc6cda3 JA |
1339 | bash_input.type = st_none; |
1340 | FREE (bash_input.name); | |
726f6388 JA |
1341 | bash_input.name = (char *)NULL; |
1342 | bash_input.location.file = (FILE *)NULL; | |
1343 | bash_input.location.string = (char *)NULL; | |
f73dda09 JA |
1344 | bash_input.getter = (sh_cget_func_t *)NULL; |
1345 | bash_input.ungetter = (sh_cunget_func_t *)NULL; | |
726f6388 JA |
1346 | } |
1347 | ||
1348 | /* Set the contents of the current bash input stream from | |
1349 | GET, UNGET, TYPE, NAME, and LOCATION. */ | |
1350 | void | |
1351 | init_yy_io (get, unget, type, name, location) | |
f73dda09 JA |
1352 | sh_cget_func_t *get; |
1353 | sh_cunget_func_t *unget; | |
d166f048 | 1354 | enum stream_type type; |
f73dda09 | 1355 | const char *name; |
726f6388 JA |
1356 | INPUT_STREAM location; |
1357 | { | |
1358 | bash_input.type = type; | |
1359 | FREE (bash_input.name); | |
ccc6cda3 | 1360 | bash_input.name = name ? savestring (name) : (char *)NULL; |
726f6388 | 1361 | |
ccc6cda3 | 1362 | /* XXX */ |
726f6388 JA |
1363 | #if defined (CRAY) |
1364 | memcpy((char *)&bash_input.location.string, (char *)&location.string, sizeof(location)); | |
1365 | #else | |
1366 | bash_input.location = location; | |
1367 | #endif | |
1368 | bash_input.getter = get; | |
1369 | bash_input.ungetter = unget; | |
1370 | } | |
1371 | ||
7117c2d2 JA |
1372 | char * |
1373 | yy_input_name () | |
1374 | { | |
1375 | return (bash_input.name ? bash_input.name : "stdin"); | |
1376 | } | |
1377 | ||
726f6388 | 1378 | /* Call this to get the next character of input. */ |
f73dda09 | 1379 | static int |
726f6388 JA |
1380 | yy_getc () |
1381 | { | |
1382 | return (*(bash_input.getter)) (); | |
1383 | } | |
1384 | ||
1385 | /* Call this to unget C. That is, to make C the next character | |
1386 | to be read. */ | |
f73dda09 | 1387 | static int |
726f6388 JA |
1388 | yy_ungetc (c) |
1389 | int c; | |
1390 | { | |
1391 | return (*(bash_input.ungetter)) (c); | |
1392 | } | |
1393 | ||
1394 | #if defined (BUFFERED_INPUT) | |
f73dda09 | 1395 | #ifdef INCLUDE_UNUSED |
726f6388 JA |
1396 | int |
1397 | input_file_descriptor () | |
1398 | { | |
1399 | switch (bash_input.type) | |
1400 | { | |
1401 | case st_stream: | |
1402 | return (fileno (bash_input.location.file)); | |
1403 | case st_bstream: | |
1404 | return (bash_input.location.buffered_fd); | |
ccc6cda3 | 1405 | case st_stdin: |
726f6388 JA |
1406 | default: |
1407 | return (fileno (stdin)); | |
1408 | } | |
1409 | } | |
f73dda09 | 1410 | #endif |
726f6388 JA |
1411 | #endif /* BUFFERED_INPUT */ |
1412 | ||
1413 | /* **************************************************************** */ | |
1414 | /* */ | |
1415 | /* Let input be read from readline (). */ | |
1416 | /* */ | |
1417 | /* **************************************************************** */ | |
1418 | ||
1419 | #if defined (READLINE) | |
1420 | char *current_readline_prompt = (char *)NULL; | |
1421 | char *current_readline_line = (char *)NULL; | |
1422 | int current_readline_line_index = 0; | |
1423 | ||
1424 | static int | |
1425 | yy_readline_get () | |
1426 | { | |
ccc6cda3 | 1427 | SigHandler *old_sigint; |
f73dda09 JA |
1428 | int line_len; |
1429 | unsigned char c; | |
ccc6cda3 | 1430 | |
726f6388 JA |
1431 | if (!current_readline_line) |
1432 | { | |
726f6388 JA |
1433 | if (!bash_readline_initialized) |
1434 | initialize_readline (); | |
1435 | ||
1436 | #if defined (JOB_CONTROL) | |
1437 | if (job_control) | |
28ef6c31 | 1438 | give_terminal_to (shell_pgrp, 0); |
726f6388 JA |
1439 | #endif /* JOB_CONTROL */ |
1440 | ||
495aee44 | 1441 | old_sigint = (SigHandler *)IMPOSSIBLE_TRAP_HANDLER; |
726f6388 JA |
1442 | if (signal_is_ignored (SIGINT) == 0) |
1443 | { | |
ac50fbac | 1444 | /* interrupt_immediately++; */ |
495aee44 | 1445 | old_sigint = (SigHandler *)set_signal_handler (SIGINT, sigint_sighandler); |
726f6388 JA |
1446 | } |
1447 | ||
ccc6cda3 JA |
1448 | current_readline_line = readline (current_readline_prompt ? |
1449 | current_readline_prompt : ""); | |
726f6388 | 1450 | |
ac50fbac | 1451 | CHECK_TERMSIG; |
495aee44 | 1452 | if (signal_is_ignored (SIGINT) == 0) |
726f6388 | 1453 | { |
ac50fbac | 1454 | /* interrupt_immediately--; */ |
495aee44 CR |
1455 | if (old_sigint != IMPOSSIBLE_TRAP_HANDLER) |
1456 | set_signal_handler (SIGINT, old_sigint); | |
726f6388 JA |
1457 | } |
1458 | ||
ccc6cda3 JA |
1459 | #if 0 |
1460 | /* Reset the prompt to the decoded value of prompt_string_pointer. */ | |
726f6388 | 1461 | reset_readline_prompt (); |
ccc6cda3 | 1462 | #endif |
726f6388 | 1463 | |
ccc6cda3 | 1464 | if (current_readline_line == 0) |
726f6388 JA |
1465 | return (EOF); |
1466 | ||
ccc6cda3 | 1467 | current_readline_line_index = 0; |
726f6388 | 1468 | line_len = strlen (current_readline_line); |
ccc6cda3 | 1469 | |
f73dda09 | 1470 | current_readline_line = (char *)xrealloc (current_readline_line, 2 + line_len); |
726f6388 JA |
1471 | current_readline_line[line_len++] = '\n'; |
1472 | current_readline_line[line_len] = '\0'; | |
1473 | } | |
1474 | ||
ccc6cda3 | 1475 | if (current_readline_line[current_readline_line_index] == 0) |
726f6388 JA |
1476 | { |
1477 | free (current_readline_line); | |
1478 | current_readline_line = (char *)NULL; | |
1479 | return (yy_readline_get ()); | |
1480 | } | |
1481 | else | |
1482 | { | |
f73dda09 | 1483 | c = current_readline_line[current_readline_line_index++]; |
726f6388 JA |
1484 | return (c); |
1485 | } | |
1486 | } | |
1487 | ||
1488 | static int | |
1489 | yy_readline_unget (c) | |
ccc6cda3 | 1490 | int c; |
726f6388 JA |
1491 | { |
1492 | if (current_readline_line_index && current_readline_line) | |
1493 | current_readline_line[--current_readline_line_index] = c; | |
1494 | return (c); | |
1495 | } | |
1496 | ||
ccc6cda3 | 1497 | void |
726f6388 JA |
1498 | with_input_from_stdin () |
1499 | { | |
1500 | INPUT_STREAM location; | |
1501 | ||
1502 | if (bash_input.type != st_stdin && stream_on_stack (st_stdin) == 0) | |
1503 | { | |
1504 | location.string = current_readline_line; | |
1505 | init_yy_io (yy_readline_get, yy_readline_unget, | |
1506 | st_stdin, "readline stdin", location); | |
1507 | } | |
1508 | } | |
1509 | ||
1510 | #else /* !READLINE */ | |
1511 | ||
1512 | void | |
1513 | with_input_from_stdin () | |
1514 | { | |
1515 | with_input_from_stream (stdin, "stdin"); | |
1516 | } | |
1517 | #endif /* !READLINE */ | |
1518 | ||
1519 | /* **************************************************************** */ | |
1520 | /* */ | |
1521 | /* Let input come from STRING. STRING is zero terminated. */ | |
1522 | /* */ | |
1523 | /* **************************************************************** */ | |
1524 | ||
1525 | static int | |
1526 | yy_string_get () | |
1527 | { | |
ccc6cda3 | 1528 | register char *string; |
f73dda09 | 1529 | register unsigned char c; |
726f6388 JA |
1530 | |
1531 | string = bash_input.location.string; | |
726f6388 JA |
1532 | |
1533 | /* If the string doesn't exist, or is empty, EOF found. */ | |
1534 | if (string && *string) | |
1535 | { | |
f73dda09 | 1536 | c = *string++; |
726f6388 | 1537 | bash_input.location.string = string; |
f73dda09 | 1538 | return (c); |
726f6388 | 1539 | } |
f73dda09 JA |
1540 | else |
1541 | return (EOF); | |
726f6388 JA |
1542 | } |
1543 | ||
1544 | static int | |
1545 | yy_string_unget (c) | |
1546 | int c; | |
1547 | { | |
1548 | *(--bash_input.location.string) = c; | |
1549 | return (c); | |
1550 | } | |
1551 | ||
1552 | void | |
1553 | with_input_from_string (string, name) | |
f73dda09 JA |
1554 | char *string; |
1555 | const char *name; | |
726f6388 JA |
1556 | { |
1557 | INPUT_STREAM location; | |
1558 | ||
1559 | location.string = string; | |
726f6388 JA |
1560 | init_yy_io (yy_string_get, yy_string_unget, st_string, name, location); |
1561 | } | |
1562 | ||
3185942a JA |
1563 | /* Count the number of characters we've consumed from bash_input.location.string |
1564 | and read into shell_input_line, but have not returned from shell_getc. | |
1565 | That is the true input location. Rewind bash_input.location.string by | |
1566 | that number of characters, so it points to the last character actually | |
1567 | consumed by the parser. */ | |
1568 | static void | |
1569 | rewind_input_string () | |
1570 | { | |
1571 | int xchars; | |
1572 | ||
1573 | /* number of unconsumed characters in the input -- XXX need to take newlines | |
1574 | into account, e.g., $(...\n) */ | |
1575 | xchars = shell_input_line_len - shell_input_line_index; | |
1576 | if (bash_input.location.string[-1] == '\n') | |
1577 | xchars++; | |
1578 | ||
1579 | /* XXX - how to reflect bash_input.location.string back to string passed to | |
1580 | parse_and_execute or xparse_dolparen? xparse_dolparen needs to know how | |
1581 | far into the string we parsed. parse_and_execute knows where bash_input. | |
1582 | location.string is, and how far from orig_string that is -- that's the | |
1583 | number of characters the command consumed. */ | |
1584 | ||
1585 | /* bash_input.location.string - xchars should be where we parsed to */ | |
1586 | /* need to do more validation on xchars value for sanity -- test cases. */ | |
1587 | bash_input.location.string -= xchars; | |
1588 | } | |
1589 | ||
726f6388 JA |
1590 | /* **************************************************************** */ |
1591 | /* */ | |
1592 | /* Let input come from STREAM. */ | |
1593 | /* */ | |
1594 | /* **************************************************************** */ | |
1595 | ||
bb70624e JA |
1596 | /* These two functions used to test the value of the HAVE_RESTARTABLE_SYSCALLS |
1597 | define, and just use getc/ungetc if it was defined, but since bash | |
1598 | installs its signal handlers without the SA_RESTART flag, some signals | |
1599 | (like SIGCHLD, SIGWINCH, etc.) received during a read(2) will not cause | |
1600 | the read to be restarted. We need to restart it ourselves. */ | |
1601 | ||
726f6388 JA |
1602 | static int |
1603 | yy_stream_get () | |
1604 | { | |
bb70624e | 1605 | int result; |
726f6388 | 1606 | |
bb70624e | 1607 | result = EOF; |
726f6388 | 1608 | if (bash_input.location.file) |
95732b49 | 1609 | { |
ac50fbac | 1610 | #if 0 |
95732b49 | 1611 | if (interactive) |
ac50fbac CR |
1612 | interrupt_immediately++; |
1613 | #endif | |
1614 | ||
1615 | /* XXX - don't need terminate_immediately; getc_with_restart checks | |
1616 | for terminating signals itself if read returns < 0 */ | |
95732b49 | 1617 | result = getc_with_restart (bash_input.location.file); |
ac50fbac CR |
1618 | |
1619 | #if 0 | |
95732b49 | 1620 | if (interactive) |
ac50fbac CR |
1621 | interrupt_immediately--; |
1622 | #endif | |
95732b49 | 1623 | } |
726f6388 JA |
1624 | return (result); |
1625 | } | |
1626 | ||
1627 | static int | |
1628 | yy_stream_unget (c) | |
1629 | int c; | |
1630 | { | |
726f6388 | 1631 | return (ungetc_with_restart (c, bash_input.location.file)); |
726f6388 JA |
1632 | } |
1633 | ||
1634 | void | |
1635 | with_input_from_stream (stream, name) | |
1636 | FILE *stream; | |
f73dda09 | 1637 | const char *name; |
726f6388 JA |
1638 | { |
1639 | INPUT_STREAM location; | |
1640 | ||
1641 | location.file = stream; | |
1642 | init_yy_io (yy_stream_get, yy_stream_unget, st_stream, name, location); | |
1643 | } | |
1644 | ||
1645 | typedef struct stream_saver { | |
1646 | struct stream_saver *next; | |
1647 | BASH_INPUT bash_input; | |
1648 | int line; | |
1649 | #if defined (BUFFERED_INPUT) | |
1650 | BUFFERED_STREAM *bstream; | |
1651 | #endif /* BUFFERED_INPUT */ | |
1652 | } STREAM_SAVER; | |
1653 | ||
1654 | /* The globally known line number. */ | |
1655 | int line_number = 0; | |
1656 | ||
495aee44 CR |
1657 | /* The line number offset set by assigning to LINENO. Not currently used. */ |
1658 | int line_number_base = 0; | |
1659 | ||
cce855bc JA |
1660 | #if defined (COND_COMMAND) |
1661 | static int cond_lineno; | |
1662 | static int cond_token; | |
1663 | #endif | |
1664 | ||
726f6388 JA |
1665 | STREAM_SAVER *stream_list = (STREAM_SAVER *)NULL; |
1666 | ||
ccc6cda3 JA |
1667 | void |
1668 | push_stream (reset_lineno) | |
1669 | int reset_lineno; | |
726f6388 JA |
1670 | { |
1671 | STREAM_SAVER *saver = (STREAM_SAVER *)xmalloc (sizeof (STREAM_SAVER)); | |
1672 | ||
1673 | xbcopy ((char *)&bash_input, (char *)&(saver->bash_input), sizeof (BASH_INPUT)); | |
1674 | ||
1675 | #if defined (BUFFERED_INPUT) | |
1676 | saver->bstream = (BUFFERED_STREAM *)NULL; | |
1677 | /* If we have a buffered stream, clear out buffers[fd]. */ | |
1678 | if (bash_input.type == st_bstream && bash_input.location.buffered_fd >= 0) | |
cce855bc JA |
1679 | saver->bstream = set_buffered_stream (bash_input.location.buffered_fd, |
1680 | (BUFFERED_STREAM *)NULL); | |
726f6388 JA |
1681 | #endif /* BUFFERED_INPUT */ |
1682 | ||
1683 | saver->line = line_number; | |
1684 | bash_input.name = (char *)NULL; | |
1685 | saver->next = stream_list; | |
1686 | stream_list = saver; | |
ccc6cda3 JA |
1687 | EOF_Reached = 0; |
1688 | if (reset_lineno) | |
1689 | line_number = 0; | |
726f6388 JA |
1690 | } |
1691 | ||
ccc6cda3 | 1692 | void |
726f6388 JA |
1693 | pop_stream () |
1694 | { | |
726f6388 JA |
1695 | if (!stream_list) |
1696 | EOF_Reached = 1; | |
1697 | else | |
1698 | { | |
1699 | STREAM_SAVER *saver = stream_list; | |
1700 | ||
1701 | EOF_Reached = 0; | |
1702 | stream_list = stream_list->next; | |
1703 | ||
1704 | init_yy_io (saver->bash_input.getter, | |
1705 | saver->bash_input.ungetter, | |
1706 | saver->bash_input.type, | |
1707 | saver->bash_input.name, | |
1708 | saver->bash_input.location); | |
1709 | ||
1710 | #if defined (BUFFERED_INPUT) | |
1711 | /* If we have a buffered stream, restore buffers[fd]. */ | |
1712 | /* If the input file descriptor was changed while this was on the | |
1713 | save stack, update the buffered fd to the new file descriptor and | |
1714 | re-establish the buffer <-> bash_input fd correspondence. */ | |
1715 | if (bash_input.type == st_bstream && bash_input.location.buffered_fd >= 0) | |
28ef6c31 JA |
1716 | { |
1717 | if (bash_input_fd_changed) | |
726f6388 JA |
1718 | { |
1719 | bash_input_fd_changed = 0; | |
1720 | if (default_buffered_input >= 0) | |
1721 | { | |
1722 | bash_input.location.buffered_fd = default_buffered_input; | |
1723 | saver->bstream->b_fd = default_buffered_input; | |
28ef6c31 | 1724 | SET_CLOSE_ON_EXEC (default_buffered_input); |
726f6388 JA |
1725 | } |
1726 | } | |
28ef6c31 | 1727 | /* XXX could free buffered stream returned as result here. */ |
cce855bc | 1728 | set_buffered_stream (bash_input.location.buffered_fd, saver->bstream); |
28ef6c31 | 1729 | } |
726f6388 JA |
1730 | #endif /* BUFFERED_INPUT */ |
1731 | ||
1732 | line_number = saver->line; | |
1733 | ||
1734 | FREE (saver->bash_input.name); | |
1735 | free (saver); | |
1736 | } | |
1737 | } | |
1738 | ||
1739 | /* Return 1 if a stream of type TYPE is saved on the stack. */ | |
1740 | int | |
1741 | stream_on_stack (type) | |
ccc6cda3 | 1742 | enum stream_type type; |
726f6388 JA |
1743 | { |
1744 | register STREAM_SAVER *s; | |
ccc6cda3 | 1745 | |
726f6388 JA |
1746 | for (s = stream_list; s; s = s->next) |
1747 | if (s->bash_input.type == type) | |
1748 | return 1; | |
1749 | return 0; | |
1750 | } | |
1751 | ||
bb70624e JA |
1752 | /* Save the current token state and return it in a malloced array. */ |
1753 | int * | |
1754 | save_token_state () | |
1755 | { | |
1756 | int *ret; | |
1757 | ||
89a92869 | 1758 | ret = (int *)xmalloc (4 * sizeof (int)); |
bb70624e JA |
1759 | ret[0] = last_read_token; |
1760 | ret[1] = token_before_that; | |
1761 | ret[2] = two_tokens_ago; | |
89a92869 | 1762 | ret[3] = current_token; |
bb70624e JA |
1763 | return ret; |
1764 | } | |
1765 | ||
1766 | void | |
1767 | restore_token_state (ts) | |
1768 | int *ts; | |
1769 | { | |
1770 | if (ts == 0) | |
1771 | return; | |
1772 | last_read_token = ts[0]; | |
1773 | token_before_that = ts[1]; | |
1774 | two_tokens_ago = ts[2]; | |
89a92869 | 1775 | current_token = ts[3]; |
bb70624e JA |
1776 | } |
1777 | ||
726f6388 JA |
1778 | /* |
1779 | * This is used to inhibit alias expansion and reserved word recognition | |
ccc6cda3 JA |
1780 | * inside case statement pattern lists. A `case statement pattern list' is: |
1781 | * | |
726f6388 JA |
1782 | * everything between the `in' in a `case word in' and the next ')' |
1783 | * or `esac' | |
1784 | * everything between a `;;' and the next `)' or `esac' | |
1785 | */ | |
726f6388 | 1786 | |
cce855bc JA |
1787 | #if defined (ALIAS) || defined (DPAREN_ARITHMETIC) |
1788 | ||
ccc6cda3 JA |
1789 | #define END_OF_ALIAS 0 |
1790 | ||
726f6388 JA |
1791 | /* |
1792 | * Pseudo-global variables used in implementing token-wise alias expansion. | |
1793 | */ | |
1794 | ||
726f6388 | 1795 | /* |
ccc6cda3 | 1796 | * Pushing and popping strings. This works together with shell_getc to |
726f6388 JA |
1797 | * implement alias expansion on a per-token basis. |
1798 | */ | |
1799 | ||
ac50fbac CR |
1800 | #define PSH_ALIAS 0x01 |
1801 | #define PSH_DPAREN 0x02 | |
1802 | #define PSH_SOURCE 0x04 | |
1803 | ||
726f6388 JA |
1804 | typedef struct string_saver { |
1805 | struct string_saver *next; | |
1806 | int expand_alias; /* Value to set expand_alias to when string is popped. */ | |
1807 | char *saved_line; | |
cce855bc | 1808 | #if defined (ALIAS) |
ccc6cda3 | 1809 | alias_t *expander; /* alias that caused this line to be pushed. */ |
cce855bc | 1810 | #endif |
ac50fbac CR |
1811 | size_t saved_line_size, saved_line_index; |
1812 | int saved_line_terminator; | |
1813 | int flags; | |
726f6388 JA |
1814 | } STRING_SAVER; |
1815 | ||
1816 | STRING_SAVER *pushed_string_list = (STRING_SAVER *)NULL; | |
1817 | ||
726f6388 JA |
1818 | /* |
1819 | * Push the current shell_input_line onto a stack of such lines and make S | |
1820 | * the current input. Used when expanding aliases. EXPAND is used to set | |
1821 | * the value of expand_next_token when the string is popped, so that the | |
1822 | * word after the alias in the original line is handled correctly when the | |
1823 | * alias expands to multiple words. TOKEN is the token that was expanded | |
1824 | * into S; it is saved and used to prevent infinite recursive expansion. | |
1825 | */ | |
1826 | static void | |
ccc6cda3 | 1827 | push_string (s, expand, ap) |
726f6388 JA |
1828 | char *s; |
1829 | int expand; | |
ccc6cda3 | 1830 | alias_t *ap; |
726f6388 | 1831 | { |
f73dda09 | 1832 | STRING_SAVER *temp = (STRING_SAVER *)xmalloc (sizeof (STRING_SAVER)); |
726f6388 JA |
1833 | |
1834 | temp->expand_alias = expand; | |
1835 | temp->saved_line = shell_input_line; | |
1836 | temp->saved_line_size = shell_input_line_size; | |
1837 | temp->saved_line_index = shell_input_line_index; | |
1838 | temp->saved_line_terminator = shell_input_line_terminator; | |
ac50fbac | 1839 | temp->flags = 0; |
cce855bc | 1840 | #if defined (ALIAS) |
ccc6cda3 | 1841 | temp->expander = ap; |
ac50fbac CR |
1842 | if (ap) |
1843 | temp->flags = PSH_ALIAS; | |
cce855bc | 1844 | #endif |
726f6388 JA |
1845 | temp->next = pushed_string_list; |
1846 | pushed_string_list = temp; | |
1847 | ||
cce855bc | 1848 | #if defined (ALIAS) |
d166f048 JA |
1849 | if (ap) |
1850 | ap->flags |= AL_BEINGEXPANDED; | |
cce855bc | 1851 | #endif |
726f6388 JA |
1852 | |
1853 | shell_input_line = s; | |
ac50fbac | 1854 | shell_input_line_size = STRLEN (s); |
726f6388 JA |
1855 | shell_input_line_index = 0; |
1856 | shell_input_line_terminator = '\0'; | |
b80f6443 JA |
1857 | #if 0 |
1858 | parser_state &= ~PST_ALEXPNEXT; /* XXX */ | |
1859 | #endif | |
7117c2d2 JA |
1860 | |
1861 | set_line_mbstate (); | |
726f6388 JA |
1862 | } |
1863 | ||
1864 | /* | |
1865 | * Make the top of the pushed_string stack be the current shell input. | |
1866 | * Only called when there is something on the stack. Called from shell_getc | |
1867 | * when it thinks it has consumed the string generated by an alias expansion | |
1868 | * and needs to return to the original input line. | |
1869 | */ | |
1870 | static void | |
1871 | pop_string () | |
1872 | { | |
1873 | STRING_SAVER *t; | |
1874 | ||
1875 | FREE (shell_input_line); | |
1876 | shell_input_line = pushed_string_list->saved_line; | |
1877 | shell_input_line_index = pushed_string_list->saved_line_index; | |
1878 | shell_input_line_size = pushed_string_list->saved_line_size; | |
1879 | shell_input_line_terminator = pushed_string_list->saved_line_terminator; | |
ccc6cda3 JA |
1880 | |
1881 | if (pushed_string_list->expand_alias) | |
1882 | parser_state |= PST_ALEXPNEXT; | |
1883 | else | |
1884 | parser_state &= ~PST_ALEXPNEXT; | |
726f6388 JA |
1885 | |
1886 | t = pushed_string_list; | |
1887 | pushed_string_list = pushed_string_list->next; | |
ccc6cda3 | 1888 | |
cce855bc | 1889 | #if defined (ALIAS) |
d166f048 JA |
1890 | if (t->expander) |
1891 | t->expander->flags &= ~AL_BEINGEXPANDED; | |
cce855bc | 1892 | #endif |
ccc6cda3 JA |
1893 | |
1894 | free ((char *)t); | |
7117c2d2 JA |
1895 | |
1896 | set_line_mbstate (); | |
726f6388 JA |
1897 | } |
1898 | ||
1899 | static void | |
1900 | free_string_list () | |
1901 | { | |
ccc6cda3 | 1902 | register STRING_SAVER *t, *t1; |
726f6388 | 1903 | |
ccc6cda3 | 1904 | for (t = pushed_string_list; t; ) |
726f6388 JA |
1905 | { |
1906 | t1 = t->next; | |
1907 | FREE (t->saved_line); | |
cce855bc JA |
1908 | #if defined (ALIAS) |
1909 | if (t->expander) | |
1910 | t->expander->flags &= ~AL_BEINGEXPANDED; | |
1911 | #endif | |
726f6388 JA |
1912 | free ((char *)t); |
1913 | t = t1; | |
1914 | } | |
1915 | pushed_string_list = (STRING_SAVER *)NULL; | |
1916 | } | |
1917 | ||
cce855bc | 1918 | #endif /* ALIAS || DPAREN_ARITHMETIC */ |
ccc6cda3 | 1919 | |
b80f6443 JA |
1920 | void |
1921 | free_pushed_string_input () | |
1922 | { | |
1923 | #if defined (ALIAS) || defined (DPAREN_ARITHMETIC) | |
1924 | free_string_list (); | |
1925 | #endif | |
1926 | } | |
1927 | ||
ac50fbac CR |
1928 | int |
1929 | parser_expanding_alias () | |
1930 | { | |
1931 | return (expanding_alias ()); | |
1932 | } | |
1933 | ||
1934 | void | |
1935 | parser_save_alias () | |
1936 | { | |
1937 | #if defined (ALIAS) || defined (DPAREN_ARITHMETIC) | |
1938 | push_string ((char *)NULL, 0, (alias_t *)NULL); | |
1939 | pushed_string_list->flags = PSH_SOURCE; /* XXX - for now */ | |
1940 | #else | |
1941 | ; | |
1942 | #endif | |
1943 | } | |
1944 | ||
1945 | void | |
1946 | parser_restore_alias () | |
1947 | { | |
1948 | #if defined (ALIAS) || defined (DPAREN_ARITHMETIC) | |
1949 | if (pushed_string_list) | |
1950 | pop_string (); | |
1951 | #else | |
1952 | ; | |
1953 | #endif | |
1954 | } | |
1955 | ||
726f6388 JA |
1956 | /* Return a line of text, taken from wherever yylex () reads input. |
1957 | If there is no more input, then we return NULL. If REMOVE_QUOTED_NEWLINE | |
1958 | is non-zero, we remove unquoted \<newline> pairs. This is used by | |
1959 | read_secondary_line to read here documents. */ | |
1960 | static char * | |
1961 | read_a_line (remove_quoted_newline) | |
1962 | int remove_quoted_newline; | |
1963 | { | |
1964 | static char *line_buffer = (char *)NULL; | |
1965 | static int buffer_size = 0; | |
0001803f | 1966 | int indx, c, peekc, pass_next; |
726f6388 | 1967 | |
ccc6cda3 | 1968 | #if defined (READLINE) |
b80f6443 | 1969 | if (no_line_editing && SHOULD_PROMPT ()) |
ccc6cda3 | 1970 | #else |
b80f6443 | 1971 | if (SHOULD_PROMPT ()) |
ccc6cda3 JA |
1972 | #endif |
1973 | print_prompt (); | |
1974 | ||
0001803f | 1975 | pass_next = indx = 0; |
726f6388 JA |
1976 | while (1) |
1977 | { | |
726f6388 JA |
1978 | /* Allow immediate exit if interrupted during input. */ |
1979 | QUIT; | |
1980 | ||
95732b49 JA |
1981 | c = yy_getc (); |
1982 | ||
28ef6c31 | 1983 | /* Ignore null bytes in input. */ |
726f6388 | 1984 | if (c == 0) |
28ef6c31 JA |
1985 | { |
1986 | #if 0 | |
1987 | internal_warning ("read_a_line: ignored null byte in input"); | |
1988 | #endif | |
1989 | continue; | |
1990 | } | |
726f6388 JA |
1991 | |
1992 | /* If there is no more input, then we return NULL. */ | |
1993 | if (c == EOF) | |
1994 | { | |
ccc6cda3 JA |
1995 | if (interactive && bash_input.type == st_stream) |
1996 | clearerr (stdin); | |
726f6388 JA |
1997 | if (indx == 0) |
1998 | return ((char *)NULL); | |
1999 | c = '\n'; | |
2000 | } | |
2001 | ||
2002 | /* `+2' in case the final character in the buffer is a newline. */ | |
ccc6cda3 | 2003 | RESIZE_MALLOCED_BUFFER (line_buffer, indx, 2, buffer_size, 128); |
726f6388 JA |
2004 | |
2005 | /* IF REMOVE_QUOTED_NEWLINES is non-zero, we are reading a | |
2006 | here document with an unquoted delimiter. In this case, | |
2007 | the line will be expanded as if it were in double quotes. | |
2008 | We allow a backslash to escape the next character, but we | |
2009 | need to treat the backslash specially only if a backslash | |
2010 | quoting a backslash-newline pair appears in the line. */ | |
2011 | if (pass_next) | |
28ef6c31 | 2012 | { |
726f6388 JA |
2013 | line_buffer[indx++] = c; |
2014 | pass_next = 0; | |
28ef6c31 | 2015 | } |
726f6388 JA |
2016 | else if (c == '\\' && remove_quoted_newline) |
2017 | { | |
495aee44 | 2018 | QUIT; |
726f6388 JA |
2019 | peekc = yy_getc (); |
2020 | if (peekc == '\n') | |
b80f6443 JA |
2021 | { |
2022 | line_number++; | |
2023 | continue; /* Make the unquoted \<newline> pair disappear. */ | |
2024 | } | |
726f6388 JA |
2025 | else |
2026 | { | |
2027 | yy_ungetc (peekc); | |
2028 | pass_next = 1; | |
2029 | line_buffer[indx++] = c; /* Preserve the backslash. */ | |
2030 | } | |
2031 | } | |
2032 | else | |
2033 | line_buffer[indx++] = c; | |
2034 | ||
2035 | if (c == '\n') | |
2036 | { | |
2037 | line_buffer[indx] = '\0'; | |
2038 | return (line_buffer); | |
2039 | } | |
2040 | } | |
2041 | } | |
2042 | ||
2043 | /* Return a line as in read_a_line (), but insure that the prompt is | |
2044 | the secondary prompt. This is used to read the lines of a here | |
2045 | document. REMOVE_QUOTED_NEWLINE is non-zero if we should remove | |
2046 | newlines quoted with backslashes while reading the line. It is | |
2047 | non-zero unless the delimiter of the here document was quoted. */ | |
2048 | char * | |
2049 | read_secondary_line (remove_quoted_newline) | |
2050 | int remove_quoted_newline; | |
2051 | { | |
3185942a JA |
2052 | char *ret; |
2053 | int n, c; | |
2054 | ||
726f6388 | 2055 | prompt_string_pointer = &ps2_prompt; |
b80f6443 JA |
2056 | if (SHOULD_PROMPT()) |
2057 | prompt_again (); | |
3185942a JA |
2058 | ret = read_a_line (remove_quoted_newline); |
2059 | #if defined (HISTORY) | |
89a92869 | 2060 | if (ret && remember_on_history && (parser_state & PST_HEREDOC)) |
3185942a JA |
2061 | { |
2062 | /* To make adding the the here-document body right, we need to rely | |
2063 | on history_delimiting_chars() returning \n for the first line of | |
2064 | the here-document body and the null string for the second and | |
2065 | subsequent lines, so we avoid double newlines. | |
2066 | current_command_line_count == 2 for the first line of the body. */ | |
2067 | ||
2068 | current_command_line_count++; | |
2069 | maybe_add_history (ret); | |
2070 | } | |
2071 | #endif /* HISTORY */ | |
2072 | return ret; | |
726f6388 JA |
2073 | } |
2074 | ||
726f6388 JA |
2075 | /* **************************************************************** */ |
2076 | /* */ | |
2077 | /* YYLEX () */ | |
2078 | /* */ | |
2079 | /* **************************************************************** */ | |
2080 | ||
2081 | /* Reserved words. These are only recognized as the first word of a | |
2082 | command. */ | |
2083 | STRING_INT_ALIST word_token_alist[] = { | |
2084 | { "if", IF }, | |
2085 | { "then", THEN }, | |
2086 | { "else", ELSE }, | |
2087 | { "elif", ELIF }, | |
2088 | { "fi", FI }, | |
2089 | { "case", CASE }, | |
2090 | { "esac", ESAC }, | |
2091 | { "for", FOR }, | |
2092 | #if defined (SELECT_COMMAND) | |
2093 | { "select", SELECT }, | |
2094 | #endif | |
2095 | { "while", WHILE }, | |
2096 | { "until", UNTIL }, | |
2097 | { "do", DO }, | |
2098 | { "done", DONE }, | |
2099 | { "in", IN }, | |
2100 | { "function", FUNCTION }, | |
ccc6cda3 JA |
2101 | #if defined (COMMAND_TIMING) |
2102 | { "time", TIME }, | |
2103 | #endif | |
726f6388 JA |
2104 | { "{", '{' }, |
2105 | { "}", '}' }, | |
2106 | { "!", BANG }, | |
cce855bc JA |
2107 | #if defined (COND_COMMAND) |
2108 | { "[[", COND_START }, | |
2109 | { "]]", COND_END }, | |
3185942a JA |
2110 | #endif |
2111 | #if defined (COPROCESS_SUPPORT) | |
2112 | { "coproc", COPROC }, | |
cce855bc | 2113 | #endif |
726f6388 JA |
2114 | { (char *)NULL, 0} |
2115 | }; | |
2116 | ||
7117c2d2 JA |
2117 | /* other tokens that can be returned by read_token() */ |
2118 | STRING_INT_ALIST other_token_alist[] = { | |
2119 | /* Multiple-character tokens with special values */ | |
495aee44 | 2120 | { "--", TIMEIGN }, |
7117c2d2 JA |
2121 | { "-p", TIMEOPT }, |
2122 | { "&&", AND_AND }, | |
2123 | { "||", OR_OR }, | |
2124 | { ">>", GREATER_GREATER }, | |
2125 | { "<<", LESS_LESS }, | |
2126 | { "<&", LESS_AND }, | |
2127 | { ">&", GREATER_AND }, | |
2128 | { ";;", SEMI_SEMI }, | |
3185942a JA |
2129 | { ";&", SEMI_AND }, |
2130 | { ";;&", SEMI_SEMI_AND }, | |
7117c2d2 JA |
2131 | { "<<-", LESS_LESS_MINUS }, |
2132 | { "<<<", LESS_LESS_LESS }, | |
2133 | { "&>", AND_GREATER }, | |
3185942a | 2134 | { "&>>", AND_GREATER_GREATER }, |
7117c2d2 JA |
2135 | { "<>", LESS_GREATER }, |
2136 | { ">|", GREATER_BAR }, | |
3185942a | 2137 | { "|&", BAR_AND }, |
7117c2d2 JA |
2138 | { "EOF", yacc_EOF }, |
2139 | /* Tokens whose value is the character itself */ | |
2140 | { ">", '>' }, | |
2141 | { "<", '<' }, | |
2142 | { "-", '-' }, | |
2143 | { "{", '{' }, | |
2144 | { "}", '}' }, | |
2145 | { ";", ';' }, | |
2146 | { "(", '(' }, | |
2147 | { ")", ')' }, | |
2148 | { "|", '|' }, | |
2149 | { "&", '&' }, | |
2150 | { "newline", '\n' }, | |
2151 | { (char *)NULL, 0} | |
2152 | }; | |
2153 | ||
2154 | /* others not listed here: | |
2155 | WORD look at yylval.word | |
2156 | ASSIGNMENT_WORD look at yylval.word | |
2157 | NUMBER look at yylval.number | |
2158 | ARITH_CMD look at yylval.word_list | |
2159 | ARITH_FOR_EXPRS look at yylval.word_list | |
2160 | COND_CMD look at yylval.command | |
2161 | */ | |
b72432fd | 2162 | |
ccc6cda3 JA |
2163 | /* These are used by read_token_word, but appear up here so that shell_getc |
2164 | can use them to decide when to add otherwise blank lines to the history. */ | |
2165 | ||
2166 | /* The primary delimiter stack. */ | |
2167 | struct dstack dstack = { (char *)NULL, 0, 0 }; | |
2168 | ||
2169 | /* A temporary delimiter stack to be used when decoding prompt strings. | |
2170 | This is needed because command substitutions in prompt strings (e.g., PS2) | |
2171 | can screw up the parser's quoting state. */ | |
2172 | static struct dstack temp_dstack = { (char *)NULL, 0, 0 }; | |
2173 | ||
2174 | /* Macro for accessing the top delimiter on the stack. Returns the | |
2175 | delimiter or zero if none. */ | |
2176 | #define current_delimiter(ds) \ | |
2177 | (ds.delimiter_depth ? ds.delimiters[ds.delimiter_depth - 1] : 0) | |
2178 | ||
2179 | #define push_delimiter(ds, character) \ | |
2180 | do \ | |
2181 | { \ | |
2182 | if (ds.delimiter_depth + 2 > ds.delimiter_space) \ | |
f73dda09 | 2183 | ds.delimiters = (char *)xrealloc \ |
ccc6cda3 JA |
2184 | (ds.delimiters, (ds.delimiter_space += 10) * sizeof (char)); \ |
2185 | ds.delimiters[ds.delimiter_depth] = character; \ | |
2186 | ds.delimiter_depth++; \ | |
2187 | } \ | |
2188 | while (0) | |
2189 | ||
2190 | #define pop_delimiter(ds) ds.delimiter_depth-- | |
2191 | ||
726f6388 JA |
2192 | /* Return the next shell input character. This always reads characters |
2193 | from shell_input_line; when that line is exhausted, it is time to | |
2194 | read the next line. This is called by read_token when the shell is | |
2195 | processing normal command input. */ | |
ccc6cda3 | 2196 | |
28ef6c31 JA |
2197 | /* This implements one-character lookahead/lookbehind across physical input |
2198 | lines, to avoid something being lost because it's pushed back with | |
2199 | shell_ungetc when we're at the start of a line. */ | |
2200 | static int eol_ungetc_lookahead = 0; | |
2201 | ||
726f6388 JA |
2202 | static int |
2203 | shell_getc (remove_quoted_newline) | |
2204 | int remove_quoted_newline; | |
2205 | { | |
ccc6cda3 | 2206 | register int i; |
ac50fbac | 2207 | int c, truncating; |
f73dda09 | 2208 | unsigned char uc; |
726f6388 JA |
2209 | |
2210 | QUIT; | |
2211 | ||
95732b49 JA |
2212 | if (sigwinch_received) |
2213 | { | |
2214 | sigwinch_received = 0; | |
2215 | get_new_window_size (0, (int *)0, (int *)0); | |
2216 | } | |
2217 | ||
28ef6c31 JA |
2218 | if (eol_ungetc_lookahead) |
2219 | { | |
2220 | c = eol_ungetc_lookahead; | |
2221 | eol_ungetc_lookahead = 0; | |
2222 | return (c); | |
2223 | } | |
2224 | ||
cce855bc | 2225 | #if defined (ALIAS) || defined (DPAREN_ARITHMETIC) |
726f6388 JA |
2226 | /* If shell_input_line[shell_input_line_index] == 0, but there is |
2227 | something on the pushed list of strings, then we don't want to go | |
2228 | off and get another line. We let the code down below handle it. */ | |
2229 | ||
2230 | if (!shell_input_line || ((!shell_input_line[shell_input_line_index]) && | |
2231 | (pushed_string_list == (STRING_SAVER *)NULL))) | |
cce855bc | 2232 | #else /* !ALIAS && !DPAREN_ARITHMETIC */ |
726f6388 | 2233 | if (!shell_input_line || !shell_input_line[shell_input_line_index]) |
cce855bc | 2234 | #endif /* !ALIAS && !DPAREN_ARITHMETIC */ |
726f6388 | 2235 | { |
726f6388 JA |
2236 | line_number++; |
2237 | ||
ac50fbac CR |
2238 | /* Let's not let one really really long line blow up memory allocation */ |
2239 | if (shell_input_line && shell_input_line_size >= 32768) | |
2240 | { | |
2241 | free (shell_input_line); | |
2242 | shell_input_line = 0; | |
2243 | shell_input_line_size = 0; | |
2244 | } | |
2245 | ||
726f6388 JA |
2246 | restart_read: |
2247 | ||
2248 | /* Allow immediate exit if interrupted during input. */ | |
2249 | QUIT; | |
2250 | ||
ac50fbac | 2251 | i = truncating = 0; |
726f6388 JA |
2252 | shell_input_line_terminator = 0; |
2253 | ||
b80f6443 JA |
2254 | /* If the shell is interatctive, but not currently printing a prompt |
2255 | (interactive_shell && interactive == 0), we don't want to print | |
2256 | notifies or cleanup the jobs -- we want to defer it until we do | |
2257 | print the next prompt. */ | |
2258 | if (interactive_shell == 0 || SHOULD_PROMPT()) | |
2259 | { | |
726f6388 JA |
2260 | #if defined (JOB_CONTROL) |
2261 | /* This can cause a problem when reading a command as the result | |
2262 | of a trap, when the trap is called from flush_child. This call | |
2263 | had better not cause jobs to disappear from the job table in | |
2264 | that case, or we will have big trouble. */ | |
b80f6443 | 2265 | notify_and_cleanup (); |
726f6388 | 2266 | #else /* !JOB_CONTROL */ |
b80f6443 | 2267 | cleanup_dead_jobs (); |
726f6388 | 2268 | #endif /* !JOB_CONTROL */ |
b80f6443 | 2269 | } |
726f6388 JA |
2270 | |
2271 | #if defined (READLINE) | |
b80f6443 | 2272 | if (no_line_editing && SHOULD_PROMPT()) |
726f6388 | 2273 | #else |
b80f6443 | 2274 | if (SHOULD_PROMPT()) |
726f6388 JA |
2275 | #endif |
2276 | print_prompt (); | |
2277 | ||
2278 | if (bash_input.type == st_stream) | |
2279 | clearerr (stdin); | |
2280 | ||
28ef6c31 | 2281 | while (1) |
726f6388 | 2282 | { |
28ef6c31 JA |
2283 | c = yy_getc (); |
2284 | ||
726f6388 JA |
2285 | /* Allow immediate exit if interrupted during input. */ |
2286 | QUIT; | |
2287 | ||
28ef6c31 JA |
2288 | if (c == '\0') |
2289 | { | |
2290 | #if 0 | |
2291 | internal_warning ("shell_getc: ignored null byte in input"); | |
2292 | #endif | |
2293 | continue; | |
2294 | } | |
2295 | ||
ac50fbac CR |
2296 | /* Theoretical overflow */ |
2297 | /* If we can't put 256 bytes more into the buffer, allocate | |
2298 | everything we can and fill it as full as we can. */ | |
2299 | /* XXX - we ignore rest of line using `truncating' flag */ | |
2300 | if (shell_input_line_size > (SIZE_MAX - 256)) | |
2301 | { | |
2302 | size_t n; | |
2303 | ||
2304 | n = SIZE_MAX - i; /* how much more can we put into the buffer? */ | |
2305 | if (n <= 2) /* we have to save 1 for the newline added below */ | |
2306 | { | |
2307 | if (truncating == 0) | |
2308 | internal_warning("shell_getc: shell_input_line_size (%zu) exceeds SIZE_MAX (%llu): line truncated", shell_input_line_size, SIZE_MAX); | |
2309 | shell_input_line[i] = '\0'; | |
2310 | truncating = 1; | |
2311 | } | |
2312 | if (shell_input_line_size < SIZE_MAX) | |
2313 | { | |
2314 | shell_input_line_size = SIZE_MAX; | |
2315 | shell_input_line = xrealloc (shell_input_line, shell_input_line_size); | |
2316 | } | |
2317 | } | |
2318 | else | |
2319 | RESIZE_MALLOCED_BUFFER (shell_input_line, i, 2, shell_input_line_size, 256); | |
726f6388 JA |
2320 | |
2321 | if (c == EOF) | |
2322 | { | |
2323 | if (bash_input.type == st_stream) | |
2324 | clearerr (stdin); | |
2325 | ||
ccc6cda3 | 2326 | if (i == 0) |
726f6388 JA |
2327 | shell_input_line_terminator = EOF; |
2328 | ||
2329 | shell_input_line[i] = '\0'; | |
2330 | break; | |
2331 | } | |
2332 | ||
ac50fbac CR |
2333 | if (truncating == 0 || c == '\n') |
2334 | shell_input_line[i++] = c; | |
726f6388 JA |
2335 | |
2336 | if (c == '\n') | |
2337 | { | |
2338 | shell_input_line[--i] = '\0'; | |
2339 | current_command_line_count++; | |
2340 | break; | |
2341 | } | |
2342 | } | |
28ef6c31 | 2343 | |
726f6388 JA |
2344 | shell_input_line_index = 0; |
2345 | shell_input_line_len = i; /* == strlen (shell_input_line) */ | |
2346 | ||
7117c2d2 JA |
2347 | set_line_mbstate (); |
2348 | ||
726f6388 | 2349 | #if defined (HISTORY) |
ccc6cda3 | 2350 | if (remember_on_history && shell_input_line && shell_input_line[0]) |
726f6388 JA |
2351 | { |
2352 | char *expansions; | |
ccc6cda3 JA |
2353 | # if defined (BANG_HISTORY) |
2354 | int old_hist; | |
2355 | ||
2356 | /* If the current delimiter is a single quote, we should not be | |
2357 | performing history expansion, even if we're on a different | |
2358 | line from the original single quote. */ | |
2359 | old_hist = history_expansion_inhibited; | |
2360 | if (current_delimiter (dstack) == '\'') | |
2361 | history_expansion_inhibited = 1; | |
2362 | # endif | |
726f6388 | 2363 | expansions = pre_process_line (shell_input_line, 1, 1); |
ccc6cda3 JA |
2364 | # if defined (BANG_HISTORY) |
2365 | history_expansion_inhibited = old_hist; | |
2366 | # endif | |
d166f048 JA |
2367 | if (expansions != shell_input_line) |
2368 | { | |
2369 | free (shell_input_line); | |
2370 | shell_input_line = expansions; | |
2371 | shell_input_line_len = shell_input_line ? | |
2372 | strlen (shell_input_line) : 0; | |
495aee44 | 2373 | if (shell_input_line_len == 0) |
d166f048 JA |
2374 | current_command_line_count--; |
2375 | ||
2376 | /* We have to force the xrealloc below because we don't know | |
28ef6c31 | 2377 | the true allocated size of shell_input_line anymore. */ |
d166f048 | 2378 | shell_input_line_size = shell_input_line_len; |
7117c2d2 JA |
2379 | |
2380 | set_line_mbstate (); | |
d166f048 | 2381 | } |
726f6388 | 2382 | } |
28ef6c31 JA |
2383 | /* Try to do something intelligent with blank lines encountered while |
2384 | entering multi-line commands. XXX - this is grotesque */ | |
ccc6cda3 JA |
2385 | else if (remember_on_history && shell_input_line && |
2386 | shell_input_line[0] == '\0' && | |
28ef6c31 | 2387 | current_command_line_count > 1) |
ccc6cda3 | 2388 | { |
28ef6c31 JA |
2389 | if (current_delimiter (dstack)) |
2390 | /* We know shell_input_line[0] == 0 and we're reading some sort of | |
2391 | quoted string. This means we've got a line consisting of only | |
2392 | a newline in a quoted string. We want to make sure this line | |
2393 | gets added to the history. */ | |
2394 | maybe_add_history (shell_input_line); | |
2395 | else | |
2396 | { | |
2397 | char *hdcs; | |
495aee44 | 2398 | hdcs = history_delimiting_chars (shell_input_line); |
28ef6c31 JA |
2399 | if (hdcs && hdcs[0] == ';') |
2400 | maybe_add_history (shell_input_line); | |
2401 | } | |
ccc6cda3 JA |
2402 | } |
2403 | ||
726f6388 JA |
2404 | #endif /* HISTORY */ |
2405 | ||
2406 | if (shell_input_line) | |
2407 | { | |
2408 | /* Lines that signify the end of the shell's input should not be | |
ac50fbac CR |
2409 | echoed. We should not echo lines while parsing command |
2410 | substitutions with recursive calls into the parsing engine; those | |
2411 | should only be echoed once when we read the word. That is the | |
2412 | reason for the test against shell_eof_token, which is set to a | |
2413 | right paren when parsing the contents of command substitutions. */ | |
726f6388 | 2414 | if (echo_input_at_read && (shell_input_line[0] || |
ac50fbac CR |
2415 | shell_input_line_terminator != EOF) && |
2416 | shell_eof_token == 0) | |
726f6388 JA |
2417 | fprintf (stderr, "%s\n", shell_input_line); |
2418 | } | |
2419 | else | |
2420 | { | |
2421 | shell_input_line_size = 0; | |
2422 | prompt_string_pointer = ¤t_prompt_string; | |
b80f6443 JA |
2423 | if (SHOULD_PROMPT ()) |
2424 | prompt_again (); | |
726f6388 JA |
2425 | goto restart_read; |
2426 | } | |
2427 | ||
2428 | /* Add the newline to the end of this string, iff the string does | |
2429 | not already end in an EOF character. */ | |
2430 | if (shell_input_line_terminator != EOF) | |
2431 | { | |
6ebbb24a | 2432 | if (shell_input_line_size < SIZE_MAX-3 && (shell_input_line_len+3 > shell_input_line_size)) |
f73dda09 | 2433 | shell_input_line = (char *)xrealloc (shell_input_line, |
726f6388 JA |
2434 | 1 + (shell_input_line_size += 2)); |
2435 | ||
ccc6cda3 JA |
2436 | shell_input_line[shell_input_line_len] = '\n'; |
2437 | shell_input_line[shell_input_line_len + 1] = '\0'; | |
7117c2d2 JA |
2438 | |
2439 | set_line_mbstate (); | |
726f6388 JA |
2440 | } |
2441 | } | |
ccc6cda3 | 2442 | |
495aee44 | 2443 | next_alias_char: |
f73dda09 | 2444 | uc = shell_input_line[shell_input_line_index]; |
726f6388 | 2445 | |
f73dda09 | 2446 | if (uc) |
726f6388 JA |
2447 | shell_input_line_index++; |
2448 | ||
cce855bc | 2449 | #if defined (ALIAS) || defined (DPAREN_ARITHMETIC) |
f73dda09 | 2450 | /* If UC is NULL, we have reached the end of the current input string. If |
726f6388 JA |
2451 | pushed_string_list is non-empty, it's time to pop to the previous string |
2452 | because we have fully consumed the result of the last alias expansion. | |
2453 | Do it transparently; just return the next character of the string popped | |
2454 | to. */ | |
ac50fbac CR |
2455 | /* If pushed_string_list != 0 but pushed_string_list->expander == 0 (not |
2456 | currently tested) and the flags value is not PSH_SOURCE, we are not | |
2457 | parsing an alias, we have just saved one (push_string, when called by | |
2458 | the parse_dparen code) In this case, just go on as well. The PSH_SOURCE | |
2459 | case is handled below. */ | |
0001803f | 2460 | pop_alias: |
ac50fbac | 2461 | if (uc == 0 && pushed_string_list && pushed_string_list->flags != PSH_SOURCE) |
726f6388 | 2462 | { |
b80f6443 JA |
2463 | pop_string (); |
2464 | uc = shell_input_line[shell_input_line_index]; | |
2465 | if (uc) | |
2466 | shell_input_line_index++; | |
726f6388 | 2467 | } |
cce855bc | 2468 | #endif /* ALIAS || DPAREN_ARITHMETIC */ |
726f6388 | 2469 | |
95732b49 JA |
2470 | if MBTEST(uc == '\\' && remove_quoted_newline && shell_input_line[shell_input_line_index] == '\n') |
2471 | { | |
2472 | if (SHOULD_PROMPT ()) | |
2473 | prompt_again (); | |
2474 | line_number++; | |
495aee44 CR |
2475 | /* What do we do here if we're expanding an alias whose definition |
2476 | includes an escaped newline? If that's the last character in the | |
2477 | alias expansion, we just pop the pushed string list (recall that | |
2478 | we inhibit the appending of a space in mk_alexpansion() if newline | |
2479 | is the last character). If it's not the last character, we need | |
2480 | to consume the quoted newline and move to the next character in | |
2481 | the expansion. */ | |
509a4430 | 2482 | #if defined (ALIAS) |
0001803f CR |
2483 | if (expanding_alias () && shell_input_line[shell_input_line_index+1] == '\0') |
2484 | { | |
2485 | uc = 0; | |
2486 | goto pop_alias; | |
2487 | } | |
495aee44 CR |
2488 | else if (expanding_alias () && shell_input_line[shell_input_line_index+1] != '\0') |
2489 | { | |
2490 | shell_input_line_index++; /* skip newline */ | |
2491 | goto next_alias_char; /* and get next character */ | |
2492 | } | |
509a4430 CR |
2493 | else |
2494 | #endif | |
495aee44 | 2495 | goto restart_read; |
95732b49 JA |
2496 | } |
2497 | ||
495aee44 | 2498 | if (uc == 0 && shell_input_line_terminator == EOF) |
ccc6cda3 | 2499 | return ((shell_input_line_index != 0) ? '\n' : EOF); |
726f6388 | 2500 | |
ac50fbac CR |
2501 | #if defined (ALIAS) || defined (DPAREN_ARITHMETIC) |
2502 | /* We already know that we are not parsing an alias expansion because of the | |
2503 | check for expanding_alias() above. This knows how parse_and_execute | |
2504 | handles switching to st_string input while an alias is being expanded, | |
2505 | hence the check for pushed_string_list without pushed_string_list->expander | |
2506 | and the check for PSH_SOURCE as pushed_string_list->flags. | |
2507 | parse_and_execute and parse_string both change the input type to st_string | |
2508 | and place the string to be parsed and executed into location.string, so | |
2509 | we should not stop reading that until the pointer is '\0'. | |
2510 | The check for shell_input_line_terminator may be superfluous. | |
2511 | ||
2512 | This solves the problem of `.' inside a multi-line alias with embedded | |
2513 | newlines executing things out of order. */ | |
2514 | if (uc == 0 && bash_input.type == st_string && *bash_input.location.string && | |
2515 | pushed_string_list && pushed_string_list->flags == PSH_SOURCE && | |
2516 | shell_input_line_terminator == 0) | |
2517 | { | |
2518 | shell_input_line_index = 0; | |
2519 | goto restart_read; | |
2520 | } | |
2521 | #endif | |
2522 | ||
f73dda09 | 2523 | return (uc); |
726f6388 JA |
2524 | } |
2525 | ||
7117c2d2 JA |
2526 | /* Put C back into the input for the shell. This might need changes for |
2527 | HANDLE_MULTIBYTE around EOLs. Since we (currently) never push back a | |
2528 | character different than we read, shell_input_line_property doesn't need | |
2529 | to change when manipulating shell_input_line. The define for | |
2530 | last_shell_getc_is_singlebyte should take care of it, though. */ | |
726f6388 JA |
2531 | static void |
2532 | shell_ungetc (c) | |
2533 | int c; | |
2534 | { | |
2535 | if (shell_input_line && shell_input_line_index) | |
2536 | shell_input_line[--shell_input_line_index] = c; | |
28ef6c31 JA |
2537 | else |
2538 | eol_ungetc_lookahead = c; | |
726f6388 JA |
2539 | } |
2540 | ||
f73dda09 JA |
2541 | #ifdef INCLUDE_UNUSED |
2542 | /* Back the input pointer up by one, effectively `ungetting' a character. */ | |
ccc6cda3 JA |
2543 | static void |
2544 | shell_ungetchar () | |
2545 | { | |
2546 | if (shell_input_line && shell_input_line_index) | |
2547 | shell_input_line_index--; | |
2548 | } | |
f73dda09 | 2549 | #endif |
ccc6cda3 JA |
2550 | |
2551 | /* Discard input until CHARACTER is seen, then push that character back | |
2552 | onto the input stream. */ | |
726f6388 JA |
2553 | static void |
2554 | discard_until (character) | |
2555 | int character; | |
2556 | { | |
2557 | int c; | |
2558 | ||
2559 | while ((c = shell_getc (0)) != EOF && c != character) | |
2560 | ; | |
2561 | ||
2562 | if (c != EOF) | |
2563 | shell_ungetc (c); | |
2564 | } | |
726f6388 JA |
2565 | |
2566 | void | |
0628567a JA |
2567 | execute_variable_command (command, vname) |
2568 | char *command, *vname; | |
726f6388 | 2569 | { |
726f6388 | 2570 | char *last_lastarg; |
b80f6443 | 2571 | sh_parser_state_t ps; |
726f6388 | 2572 | |
b80f6443 | 2573 | save_parser_state (&ps); |
726f6388 JA |
2574 | last_lastarg = get_string_value ("_"); |
2575 | if (last_lastarg) | |
2576 | last_lastarg = savestring (last_lastarg); | |
2577 | ||
0628567a | 2578 | parse_and_execute (savestring (command), vname, SEVAL_NONINT|SEVAL_NOHIST); |
726f6388 | 2579 | |
b80f6443 | 2580 | restore_parser_state (&ps); |
95732b49 | 2581 | bind_variable ("_", last_lastarg, 0); |
726f6388 JA |
2582 | FREE (last_lastarg); |
2583 | ||
ccc6cda3 | 2584 | if (token_to_read == '\n') /* reset_parser was called */ |
726f6388 JA |
2585 | token_to_read = 0; |
2586 | } | |
2587 | ||
ccc6cda3 JA |
2588 | /* Place to remember the token. We try to keep the buffer |
2589 | at a reasonable size, but it can grow. */ | |
2590 | static char *token = (char *)NULL; | |
2591 | ||
2592 | /* Current size of the token buffer. */ | |
2593 | static int token_buffer_size; | |
2594 | ||
726f6388 JA |
2595 | /* Command to read_token () explaining what we want it to do. */ |
2596 | #define READ 0 | |
2597 | #define RESET 1 | |
2598 | #define prompt_is_ps1 \ | |
2599 | (!prompt_string_pointer || prompt_string_pointer == &ps1_prompt) | |
2600 | ||
2601 | /* Function for yyparse to call. yylex keeps track of | |
2602 | the last two tokens read, and calls read_token. */ | |
ccc6cda3 | 2603 | static int |
726f6388 JA |
2604 | yylex () |
2605 | { | |
ccc6cda3 | 2606 | if (interactive && (current_token == 0 || current_token == '\n')) |
726f6388 JA |
2607 | { |
2608 | /* Before we print a prompt, we might have to check mailboxes. | |
2609 | We do this only if it is time to do so. Notice that only here | |
2610 | is the mail alarm reset; nothing takes place in check_mail () | |
2611 | except the checking of mail. Please don't change this. */ | |
b4a8651a | 2612 | if (prompt_is_ps1 && parse_and_execute_level == 0 && time_to_check_mail ()) |
726f6388 JA |
2613 | { |
2614 | check_mail (); | |
2615 | reset_mail_timer (); | |
2616 | } | |
2617 | ||
2618 | /* Avoid printing a prompt if we're not going to read anything, e.g. | |
2619 | after resetting the parser with read_token (RESET). */ | |
b80f6443 | 2620 | if (token_to_read == 0 && SHOULD_PROMPT ()) |
726f6388 JA |
2621 | prompt_again (); |
2622 | } | |
2623 | ||
ccc6cda3 | 2624 | two_tokens_ago = token_before_that; |
726f6388 JA |
2625 | token_before_that = last_read_token; |
2626 | last_read_token = current_token; | |
2627 | current_token = read_token (READ); | |
3185942a JA |
2628 | |
2629 | if ((parser_state & PST_EOFTOKEN) && current_token == shell_eof_token) | |
2630 | { | |
2631 | current_token = yacc_EOF; | |
2632 | if (bash_input.type == st_string) | |
2633 | rewind_input_string (); | |
2634 | } | |
2635 | parser_state &= ~PST_EOFTOKEN; | |
2636 | ||
726f6388 JA |
2637 | return (current_token); |
2638 | } | |
2639 | ||
726f6388 JA |
2640 | /* When non-zero, we have read the required tokens |
2641 | which allow ESAC to be the next one read. */ | |
ccc6cda3 | 2642 | static int esacs_needed_count; |
726f6388 | 2643 | |
90a39f32 CR |
2644 | static void |
2645 | push_heredoc (r) | |
2646 | REDIRECT *r; | |
2647 | { | |
2648 | if (need_here_doc >= HEREDOC_MAX) | |
2649 | { | |
2650 | last_command_exit_value = EX_BADUSAGE; | |
2651 | need_here_doc = 0; | |
2652 | report_syntax_error (_("maximum here-document count exceeded")); | |
2653 | reset_parser (); | |
2654 | exit_shell (last_command_exit_value); | |
2655 | } | |
2656 | redir_stack[need_here_doc++] = r; | |
2657 | } | |
2658 | ||
726f6388 JA |
2659 | void |
2660 | gather_here_documents () | |
2661 | { | |
3185942a JA |
2662 | int r; |
2663 | ||
2664 | r = 0; | |
daefb2c5 | 2665 | while (need_here_doc > 0) |
726f6388 | 2666 | { |
3185942a JA |
2667 | parser_state |= PST_HEREDOC; |
2668 | make_here_document (redir_stack[r++], line_number); | |
2669 | parser_state &= ~PST_HEREDOC; | |
726f6388 JA |
2670 | need_here_doc--; |
2671 | } | |
2672 | } | |
2673 | ||
726f6388 JA |
2674 | /* When non-zero, an open-brace used to create a group is awaiting a close |
2675 | brace partner. */ | |
ccc6cda3 | 2676 | static int open_brace_count; |
726f6388 JA |
2677 | |
2678 | #define command_token_position(token) \ | |
0001803f | 2679 | (((token) == ASSIGNMENT_WORD) || (parser_state&PST_REDIRLIST) || \ |
3185942a | 2680 | ((token) != SEMI_SEMI && (token) != SEMI_AND && (token) != SEMI_SEMI_AND && reserved_word_acceptable(token))) |
726f6388 | 2681 | |
b80f6443 JA |
2682 | #define assignment_acceptable(token) \ |
2683 | (command_token_position(token) && ((parser_state & PST_CASEPAT) == 0)) | |
726f6388 JA |
2684 | |
2685 | /* Check to see if TOKEN is a reserved word and return the token | |
2686 | value if it is. */ | |
2687 | #define CHECK_FOR_RESERVED_WORD(tok) \ | |
2688 | do { \ | |
2689 | if (!dollar_present && !quoted && \ | |
2690 | reserved_word_acceptable (last_read_token)) \ | |
2691 | { \ | |
2692 | int i; \ | |
2693 | for (i = 0; word_token_alist[i].word != (char *)NULL; i++) \ | |
2694 | if (STREQ (tok, word_token_alist[i].word)) \ | |
2695 | { \ | |
ccc6cda3 | 2696 | if ((parser_state & PST_CASEPAT) && (word_token_alist[i].token != ESAC)) \ |
726f6388 | 2697 | break; \ |
b80f6443 | 2698 | if (word_token_alist[i].token == TIME && time_command_acceptable () == 0) \ |
cce855bc | 2699 | break; \ |
726f6388 | 2700 | if (word_token_alist[i].token == ESAC) \ |
ccc6cda3 JA |
2701 | parser_state &= ~(PST_CASEPAT|PST_CASESTMT); \ |
2702 | else if (word_token_alist[i].token == CASE) \ | |
2703 | parser_state |= PST_CASESTMT; \ | |
cce855bc JA |
2704 | else if (word_token_alist[i].token == COND_END) \ |
2705 | parser_state &= ~(PST_CONDCMD|PST_CONDEXPR); \ | |
2706 | else if (word_token_alist[i].token == COND_START) \ | |
2707 | parser_state |= PST_CONDCMD; \ | |
ccc6cda3 JA |
2708 | else if (word_token_alist[i].token == '{') \ |
2709 | open_brace_count++; \ | |
2710 | else if (word_token_alist[i].token == '}' && open_brace_count) \ | |
2711 | open_brace_count--; \ | |
726f6388 JA |
2712 | return (word_token_alist[i].token); \ |
2713 | } \ | |
2714 | } \ | |
2715 | } while (0) | |
2716 | ||
ccc6cda3 JA |
2717 | #if defined (ALIAS) |
2718 | ||
2719 | /* OK, we have a token. Let's try to alias expand it, if (and only if) | |
2720 | it's eligible. | |
2721 | ||
7117c2d2 | 2722 | It is eligible for expansion if EXPAND_ALIASES is set, and |
ccc6cda3 JA |
2723 | the token is unquoted and the last token read was a command |
2724 | separator (or expand_next_token is set), and we are currently | |
2725 | processing an alias (pushed_string_list is non-empty) and this | |
2726 | token is not the same as the current or any previously | |
2727 | processed alias. | |
2728 | ||
2729 | Special cases that disqualify: | |
2730 | In a pattern list in a case statement (parser_state & PST_CASEPAT). */ | |
b80f6443 JA |
2731 | |
2732 | static char * | |
2733 | mk_alexpansion (s) | |
2734 | char *s; | |
2735 | { | |
2736 | int l; | |
2737 | char *r; | |
2738 | ||
2739 | l = strlen (s); | |
2740 | r = xmalloc (l + 2); | |
2741 | strcpy (r, s); | |
495aee44 CR |
2742 | /* If the last character in the alias is a newline, don't add a trailing |
2743 | space to the expansion. Works with shell_getc above. */ | |
2744 | if (r[l - 1] != ' ' && r[l - 1] != '\n') | |
b80f6443 JA |
2745 | r[l++] = ' '; |
2746 | r[l] = '\0'; | |
2747 | return r; | |
2748 | } | |
2749 | ||
ccc6cda3 | 2750 | static int |
f73dda09 JA |
2751 | alias_expand_token (tokstr) |
2752 | char *tokstr; | |
726f6388 | 2753 | { |
ccc6cda3 JA |
2754 | char *expanded; |
2755 | alias_t *ap; | |
726f6388 | 2756 | |
ccc6cda3 JA |
2757 | if (((parser_state & PST_ALEXPNEXT) || command_token_position (last_read_token)) && |
2758 | (parser_state & PST_CASEPAT) == 0) | |
726f6388 | 2759 | { |
f73dda09 | 2760 | ap = find_alias (tokstr); |
ccc6cda3 JA |
2761 | |
2762 | /* Currently expanding this token. */ | |
2763 | if (ap && (ap->flags & AL_BEINGEXPANDED)) | |
2764 | return (NO_EXPANSION); | |
2765 | ||
b80f6443 JA |
2766 | /* mk_alexpansion puts an extra space on the end of the alias expansion, |
2767 | so the lookahead by the parser works right. If this gets changed, | |
2768 | make sure the code in shell_getc that deals with reaching the end of | |
2769 | an expanded alias is changed with it. */ | |
2770 | expanded = ap ? mk_alexpansion (ap->value) : (char *)NULL; | |
2771 | ||
ccc6cda3 JA |
2772 | if (expanded) |
2773 | { | |
2774 | push_string (expanded, ap->flags & AL_EXPANDNEXT, ap); | |
2775 | return (RE_READ_TOKEN); | |
2776 | } | |
2777 | else | |
2778 | /* This is an eligible token that does not have an expansion. */ | |
2779 | return (NO_EXPANSION); | |
726f6388 | 2780 | } |
ccc6cda3 JA |
2781 | return (NO_EXPANSION); |
2782 | } | |
2783 | #endif /* ALIAS */ | |
726f6388 | 2784 | |
cce855bc JA |
2785 | static int |
2786 | time_command_acceptable () | |
2787 | { | |
2788 | #if defined (COMMAND_TIMING) | |
495aee44 CR |
2789 | int i; |
2790 | ||
2791 | if (posixly_correct && shell_compatibility_level > 41) | |
2792 | { | |
2793 | /* Quick check of the rest of the line to find the next token. If it | |
2794 | begins with a `-', Posix says to not return `time' as the token. | |
2795 | This was interp 267. */ | |
2796 | i = shell_input_line_index; | |
2797 | while (i < shell_input_line_len && (shell_input_line[i] == ' ' || shell_input_line[i] == '\t')) | |
2798 | i++; | |
2799 | if (shell_input_line[i] == '-') | |
2800 | return 0; | |
2801 | } | |
2802 | ||
cce855bc JA |
2803 | switch (last_read_token) |
2804 | { | |
2805 | case 0: | |
2806 | case ';': | |
2807 | case '\n': | |
2808 | case AND_AND: | |
2809 | case OR_OR: | |
2810 | case '&': | |
b72432fd JA |
2811 | case DO: |
2812 | case THEN: | |
2813 | case ELSE: | |
28ef6c31 JA |
2814 | case '{': /* } */ |
2815 | case '(': /* ) */ | |
495aee44 CR |
2816 | case BANG: /* ! time pipeline */ |
2817 | case TIME: /* time time pipeline */ | |
2818 | case TIMEOPT: /* time -p time pipeline */ | |
2819 | case TIMEIGN: /* time -p -- ... */ | |
cce855bc JA |
2820 | return 1; |
2821 | default: | |
2822 | return 0; | |
2823 | } | |
2824 | #else | |
2825 | return 0; | |
2826 | #endif /* COMMAND_TIMING */ | |
2827 | } | |
2828 | ||
ccc6cda3 JA |
2829 | /* Handle special cases of token recognition: |
2830 | IN is recognized if the last token was WORD and the token | |
2831 | before that was FOR or CASE or SELECT. | |
2832 | ||
2833 | DO is recognized if the last token was WORD and the token | |
2834 | before that was FOR or SELECT. | |
2835 | ||
2836 | ESAC is recognized if the last token caused `esacs_needed_count' | |
2837 | to be set | |
2838 | ||
2839 | `{' is recognized if the last token as WORD and the token | |
28ef6c31 JA |
2840 | before that was FUNCTION, or if we just parsed an arithmetic |
2841 | `for' command. | |
ccc6cda3 | 2842 | |
28ef6c31 | 2843 | `}' is recognized if there is an unclosed `{' present. |
cce855bc JA |
2844 | |
2845 | `-p' is returned as TIMEOPT if the last read token was TIME. | |
495aee44 | 2846 | `--' is returned as TIMEIGN if the last read token was TIMEOPT. |
cce855bc JA |
2847 | |
2848 | ']]' is returned as COND_END if the parser is currently parsing | |
2849 | a conditional expression ((parser_state & PST_CONDEXPR) != 0) | |
2850 | ||
2851 | `time' is returned as TIME if and only if it is immediately | |
2852 | preceded by one of `;', `\n', `||', `&&', or `&'. | |
ccc6cda3 JA |
2853 | */ |
2854 | ||
2855 | static int | |
f73dda09 JA |
2856 | special_case_tokens (tokstr) |
2857 | char *tokstr; | |
ccc6cda3 JA |
2858 | { |
2859 | if ((last_read_token == WORD) && | |
2860 | #if defined (SELECT_COMMAND) | |
2861 | ((token_before_that == FOR) || (token_before_that == CASE) || (token_before_that == SELECT)) && | |
2862 | #else | |
2863 | ((token_before_that == FOR) || (token_before_that == CASE)) && | |
2864 | #endif | |
f73dda09 | 2865 | (tokstr[0] == 'i' && tokstr[1] == 'n' && tokstr[2] == 0)) |
726f6388 | 2866 | { |
ccc6cda3 JA |
2867 | if (token_before_that == CASE) |
2868 | { | |
2869 | parser_state |= PST_CASEPAT; | |
2870 | esacs_needed_count++; | |
2871 | } | |
2872 | return (IN); | |
2873 | } | |
726f6388 | 2874 | |
ccc6cda3 JA |
2875 | if (last_read_token == WORD && |
2876 | #if defined (SELECT_COMMAND) | |
2877 | (token_before_that == FOR || token_before_that == SELECT) && | |
2878 | #else | |
2879 | (token_before_that == FOR) && | |
2880 | #endif | |
f73dda09 | 2881 | (tokstr[0] == 'd' && tokstr[1] == 'o' && tokstr[2] == '\0')) |
ccc6cda3 JA |
2882 | return (DO); |
2883 | ||
2884 | /* Ditto for ESAC in the CASE case. | |
2885 | Specifically, this handles "case word in esac", which is a legal | |
2886 | construct, certainly because someone will pass an empty arg to the | |
2887 | case construct, and we don't want it to barf. Of course, we should | |
2888 | insist that the case construct has at least one pattern in it, but | |
2889 | the designers disagree. */ | |
2890 | if (esacs_needed_count) | |
2891 | { | |
2892 | esacs_needed_count--; | |
f73dda09 | 2893 | if (STREQ (tokstr, "esac")) |
726f6388 | 2894 | { |
ccc6cda3 JA |
2895 | parser_state &= ~PST_CASEPAT; |
2896 | return (ESAC); | |
726f6388 | 2897 | } |
ccc6cda3 | 2898 | } |
726f6388 | 2899 | |
ccc6cda3 JA |
2900 | /* The start of a shell function definition. */ |
2901 | if (parser_state & PST_ALLOWOPNBRC) | |
2902 | { | |
2903 | parser_state &= ~PST_ALLOWOPNBRC; | |
f73dda09 | 2904 | if (tokstr[0] == '{' && tokstr[1] == '\0') /* } */ |
726f6388 | 2905 | { |
ccc6cda3 JA |
2906 | open_brace_count++; |
2907 | function_bstart = line_number; | |
2908 | return ('{'); /* } */ | |
726f6388 | 2909 | } |
ccc6cda3 JA |
2910 | } |
2911 | ||
28ef6c31 JA |
2912 | /* We allow a `do' after a for ((...)) without an intervening |
2913 | list_terminator */ | |
f73dda09 | 2914 | if (last_read_token == ARITH_FOR_EXPRS && tokstr[0] == 'd' && tokstr[1] == 'o' && !tokstr[2]) |
28ef6c31 | 2915 | return (DO); |
f73dda09 | 2916 | if (last_read_token == ARITH_FOR_EXPRS && tokstr[0] == '{' && tokstr[1] == '\0') /* } */ |
28ef6c31 JA |
2917 | { |
2918 | open_brace_count++; | |
2919 | return ('{'); /* } */ | |
2920 | } | |
2921 | ||
f73dda09 | 2922 | if (open_brace_count && reserved_word_acceptable (last_read_token) && tokstr[0] == '}' && !tokstr[1]) |
ccc6cda3 JA |
2923 | { |
2924 | open_brace_count--; /* { */ | |
2925 | return ('}'); | |
2926 | } | |
2927 | ||
cce855bc | 2928 | #if defined (COMMAND_TIMING) |
ccc6cda3 | 2929 | /* Handle -p after `time'. */ |
f73dda09 | 2930 | if (last_read_token == TIME && tokstr[0] == '-' && tokstr[1] == 'p' && !tokstr[2]) |
ccc6cda3 | 2931 | return (TIMEOPT); |
495aee44 CR |
2932 | /* Handle -- after `time -p'. */ |
2933 | if (last_read_token == TIMEOPT && tokstr[0] == '-' && tokstr[1] == '-' && !tokstr[2]) | |
2934 | return (TIMEIGN); | |
b80f6443 | 2935 | #endif |
cce855bc JA |
2936 | |
2937 | #if defined (COND_COMMAND) /* [[ */ | |
f73dda09 | 2938 | if ((parser_state & PST_CONDEXPR) && tokstr[0] == ']' && tokstr[1] == ']' && tokstr[2] == '\0') |
cce855bc JA |
2939 | return (COND_END); |
2940 | #endif | |
726f6388 | 2941 | |
ccc6cda3 JA |
2942 | return (-1); |
2943 | } | |
2944 | ||
2945 | /* Called from shell.c when Control-C is typed at top level. Or | |
2946 | by the error rule at top level. */ | |
2947 | void | |
2948 | reset_parser () | |
2949 | { | |
2950 | dstack.delimiter_depth = 0; /* No delimiters found so far. */ | |
2951 | open_brace_count = 0; | |
2952 | ||
0001803f CR |
2953 | #if defined (EXTENDED_GLOB) |
2954 | /* Reset to global value of extended glob */ | |
2955 | if (parser_state & PST_EXTPAT) | |
2956 | extended_glob = global_extglob; | |
2957 | #endif | |
2958 | ||
ccc6cda3 JA |
2959 | parser_state = 0; |
2960 | ||
cce855bc | 2961 | #if defined (ALIAS) || defined (DPAREN_ARITHMETIC) |
ccc6cda3 | 2962 | if (pushed_string_list) |
cce855bc JA |
2963 | free_string_list (); |
2964 | #endif /* ALIAS || DPAREN_ARITHMETIC */ | |
726f6388 | 2965 | |
ccc6cda3 JA |
2966 | if (shell_input_line) |
2967 | { | |
2968 | free (shell_input_line); | |
2969 | shell_input_line = (char *)NULL; | |
2970 | shell_input_line_size = shell_input_line_index = 0; | |
2971 | } | |
2972 | ||
2973 | FREE (word_desc_to_read); | |
2974 | word_desc_to_read = (WORD_DESC *)NULL; | |
2975 | ||
836a17be CR |
2976 | eol_ungetc_lookahead = 0; |
2977 | ||
89a92869 | 2978 | current_token = '\n'; /* XXX */ |
ccc6cda3 JA |
2979 | last_read_token = '\n'; |
2980 | token_to_read = '\n'; | |
2981 | } | |
2982 | ||
2983 | /* Read the next token. Command can be READ (normal operation) or | |
2984 | RESET (to normalize state). */ | |
2985 | static int | |
2986 | read_token (command) | |
2987 | int command; | |
2988 | { | |
2989 | int character; /* Current character. */ | |
2990 | int peek_char; /* Temporary look-ahead character. */ | |
2991 | int result; /* The thing to return. */ | |
2992 | ||
2993 | if (command == RESET) | |
2994 | { | |
2995 | reset_parser (); | |
726f6388 JA |
2996 | return ('\n'); |
2997 | } | |
2998 | ||
2999 | if (token_to_read) | |
3000 | { | |
ccc6cda3 JA |
3001 | result = token_to_read; |
3002 | if (token_to_read == WORD || token_to_read == ASSIGNMENT_WORD) | |
d166f048 JA |
3003 | { |
3004 | yylval.word = word_desc_to_read; | |
3005 | word_desc_to_read = (WORD_DESC *)NULL; | |
3006 | } | |
726f6388 | 3007 | token_to_read = 0; |
ccc6cda3 | 3008 | return (result); |
726f6388 JA |
3009 | } |
3010 | ||
cce855bc JA |
3011 | #if defined (COND_COMMAND) |
3012 | if ((parser_state & (PST_CONDCMD|PST_CONDEXPR)) == PST_CONDCMD) | |
3013 | { | |
3014 | cond_lineno = line_number; | |
3015 | parser_state |= PST_CONDEXPR; | |
3016 | yylval.command = parse_cond_command (); | |
3017 | if (cond_token != COND_END) | |
3018 | { | |
7117c2d2 | 3019 | cond_error (); |
cce855bc JA |
3020 | return (-1); |
3021 | } | |
3022 | token_to_read = COND_END; | |
3023 | parser_state &= ~(PST_CONDEXPR|PST_CONDCMD); | |
3024 | return (COND_CMD); | |
3025 | } | |
3026 | #endif | |
3027 | ||
726f6388 | 3028 | #if defined (ALIAS) |
726f6388 JA |
3029 | /* This is a place to jump back to once we have successfully expanded a |
3030 | token with an alias and pushed the string with push_string () */ | |
3031 | re_read_token: | |
726f6388 JA |
3032 | #endif /* ALIAS */ |
3033 | ||
3034 | /* Read a single word from input. Start by skipping blanks. */ | |
0628567a | 3035 | while ((character = shell_getc (1)) != EOF && shellblank (character)) |
ccc6cda3 | 3036 | ; |
726f6388 JA |
3037 | |
3038 | if (character == EOF) | |
3039 | { | |
3040 | EOF_Reached = 1; | |
3041 | return (yacc_EOF); | |
3042 | } | |
3043 | ||
7117c2d2 | 3044 | if MBTEST(character == '#' && (!interactive || interactive_comments)) |
726f6388 JA |
3045 | { |
3046 | /* A comment. Discard until EOL or EOF, and then return a newline. */ | |
3047 | discard_until ('\n'); | |
3048 | shell_getc (0); | |
ccc6cda3 | 3049 | character = '\n'; /* this will take the next if statement and return. */ |
726f6388 JA |
3050 | } |
3051 | ||
3052 | if (character == '\n') | |
3053 | { | |
3054 | /* If we're about to return an unquoted newline, we can go and collect | |
3055 | the text of any pending here document. */ | |
3056 | if (need_here_doc) | |
3057 | gather_here_documents (); | |
3058 | ||
3059 | #if defined (ALIAS) | |
ccc6cda3 | 3060 | parser_state &= ~PST_ALEXPNEXT; |
726f6388 JA |
3061 | #endif /* ALIAS */ |
3062 | ||
95732b49 JA |
3063 | parser_state &= ~PST_ASSIGNOK; |
3064 | ||
726f6388 JA |
3065 | return (character); |
3066 | } | |
3067 | ||
f1be666c JA |
3068 | if (parser_state & PST_REGEXP) |
3069 | goto tokword; | |
3070 | ||
ccc6cda3 | 3071 | /* Shell meta-characters. */ |
7117c2d2 | 3072 | if MBTEST(shellmeta (character) && ((parser_state & PST_DBLPAREN) == 0)) |
726f6388 JA |
3073 | { |
3074 | #if defined (ALIAS) | |
3075 | /* Turn off alias tokenization iff this character sequence would | |
3076 | not leave us ready to read a command. */ | |
3077 | if (character == '<' || character == '>') | |
ccc6cda3 | 3078 | parser_state &= ~PST_ALEXPNEXT; |
726f6388 JA |
3079 | #endif /* ALIAS */ |
3080 | ||
95732b49 JA |
3081 | parser_state &= ~PST_ASSIGNOK; |
3082 | ||
ccc6cda3 JA |
3083 | peek_char = shell_getc (1); |
3084 | if (character == peek_char) | |
726f6388 JA |
3085 | { |
3086 | switch (character) | |
3087 | { | |
ccc6cda3 | 3088 | case '<': |
726f6388 JA |
3089 | /* If '<' then we could be at "<<" or at "<<-". We have to |
3090 | look ahead one more character. */ | |
726f6388 | 3091 | peek_char = shell_getc (1); |
3185942a | 3092 | if MBTEST(peek_char == '-') |
726f6388 | 3093 | return (LESS_LESS_MINUS); |
3185942a | 3094 | else if MBTEST(peek_char == '<') |
7117c2d2 | 3095 | return (LESS_LESS_LESS); |
726f6388 JA |
3096 | else |
3097 | { | |
3098 | shell_ungetc (peek_char); | |
3099 | return (LESS_LESS); | |
3100 | } | |
3101 | ||
3102 | case '>': | |
3103 | return (GREATER_GREATER); | |
3104 | ||
3105 | case ';': | |
ccc6cda3 | 3106 | parser_state |= PST_CASEPAT; |
726f6388 | 3107 | #if defined (ALIAS) |
ccc6cda3 | 3108 | parser_state &= ~PST_ALEXPNEXT; |
726f6388 | 3109 | #endif /* ALIAS */ |
95732b49 | 3110 | |
3185942a JA |
3111 | peek_char = shell_getc (1); |
3112 | if MBTEST(peek_char == '&') | |
3113 | return (SEMI_SEMI_AND); | |
3114 | else | |
3115 | { | |
3116 | shell_ungetc (peek_char); | |
3117 | return (SEMI_SEMI); | |
3118 | } | |
726f6388 JA |
3119 | |
3120 | case '&': | |
3121 | return (AND_AND); | |
3122 | ||
3123 | case '|': | |
3124 | return (OR_OR); | |
ccc6cda3 | 3125 | |
bb70624e | 3126 | #if defined (DPAREN_ARITHMETIC) || defined (ARITH_FOR_COMMAND) |
ccc6cda3 | 3127 | case '(': /* ) */ |
7117c2d2 JA |
3128 | result = parse_dparen (character); |
3129 | if (result == -2) | |
3130 | break; | |
3131 | else | |
3132 | return result; | |
ccc6cda3 | 3133 | #endif |
726f6388 | 3134 | } |
726f6388 | 3135 | } |
7117c2d2 | 3136 | else if MBTEST(character == '<' && peek_char == '&') |
ccc6cda3 | 3137 | return (LESS_AND); |
7117c2d2 | 3138 | else if MBTEST(character == '>' && peek_char == '&') |
ccc6cda3 | 3139 | return (GREATER_AND); |
7117c2d2 | 3140 | else if MBTEST(character == '<' && peek_char == '>') |
ccc6cda3 | 3141 | return (LESS_GREATER); |
7117c2d2 | 3142 | else if MBTEST(character == '>' && peek_char == '|') |
ccc6cda3 | 3143 | return (GREATER_BAR); |
3185942a JA |
3144 | else if MBTEST(character == '&' && peek_char == '>') |
3145 | { | |
3146 | peek_char = shell_getc (1); | |
3147 | if MBTEST(peek_char == '>') | |
3148 | return (AND_GREATER_GREATER); | |
3149 | else | |
3150 | { | |
3151 | shell_ungetc (peek_char); | |
3152 | return (AND_GREATER); | |
3153 | } | |
3154 | } | |
3155 | else if MBTEST(character == '|' && peek_char == '&') | |
3156 | return (BAR_AND); | |
3157 | else if MBTEST(character == ';' && peek_char == '&') | |
3158 | { | |
3159 | parser_state |= PST_CASEPAT; | |
3160 | #if defined (ALIAS) | |
3161 | parser_state &= ~PST_ALEXPNEXT; | |
3162 | #endif /* ALIAS */ | |
3163 | return (SEMI_AND); | |
3164 | } | |
ccc6cda3 | 3165 | |
726f6388 JA |
3166 | shell_ungetc (peek_char); |
3167 | ||
3168 | /* If we look like we are reading the start of a function | |
3169 | definition, then let the reader know about it so that | |
3170 | we will do the right thing with `{'. */ | |
7117c2d2 | 3171 | if MBTEST(character == ')' && last_read_token == '(' && token_before_that == WORD) |
726f6388 | 3172 | { |
ccc6cda3 | 3173 | parser_state |= PST_ALLOWOPNBRC; |
726f6388 | 3174 | #if defined (ALIAS) |
ccc6cda3 | 3175 | parser_state &= ~PST_ALEXPNEXT; |
726f6388 | 3176 | #endif /* ALIAS */ |
ccc6cda3 | 3177 | function_dstart = line_number; |
726f6388 JA |
3178 | } |
3179 | ||
ccc6cda3 JA |
3180 | /* case pattern lists may be preceded by an optional left paren. If |
3181 | we're not trying to parse a case pattern list, the left paren | |
3182 | indicates a subshell. */ | |
7117c2d2 | 3183 | if MBTEST(character == '(' && (parser_state & PST_CASEPAT) == 0) /* ) */ |
ccc6cda3 JA |
3184 | parser_state |= PST_SUBSHELL; |
3185 | /*(*/ | |
7117c2d2 | 3186 | else if MBTEST((parser_state & PST_CASEPAT) && character == ')') |
28ef6c31 | 3187 | parser_state &= ~PST_CASEPAT; |
ccc6cda3 | 3188 | /*(*/ |
7117c2d2 | 3189 | else if MBTEST((parser_state & PST_SUBSHELL) && character == ')') |
ccc6cda3 | 3190 | parser_state &= ~PST_SUBSHELL; |
726f6388 JA |
3191 | |
3192 | #if defined (PROCESS_SUBSTITUTION) | |
3193 | /* Check for the constructs which introduce process substitution. | |
3194 | Shells running in `posix mode' don't do process substitution. */ | |
7117c2d2 | 3195 | if MBTEST(posixly_correct || ((character != '>' && character != '<') || peek_char != '(')) /*)*/ |
726f6388 JA |
3196 | #endif /* PROCESS_SUBSTITUTION */ |
3197 | return (character); | |
3198 | } | |
3199 | ||
7117c2d2 JA |
3200 | /* Hack <&- (close stdin) case. Also <&N- (dup and close). */ |
3201 | if MBTEST(character == '-' && (last_read_token == LESS_AND || last_read_token == GREATER_AND)) | |
ccc6cda3 JA |
3202 | return (character); |
3203 | ||
f1be666c | 3204 | tokword: |
726f6388 JA |
3205 | /* Okay, if we got this far, we have to read a word. Read one, |
3206 | and then check it against the known ones. */ | |
ccc6cda3 JA |
3207 | result = read_token_word (character); |
3208 | #if defined (ALIAS) | |
3209 | if (result == RE_READ_TOKEN) | |
3210 | goto re_read_token; | |
3211 | #endif | |
3212 | return result; | |
3213 | } | |
726f6388 | 3214 | |
7117c2d2 JA |
3215 | /* |
3216 | * Match a $(...) or other grouping construct. This has to handle embedded | |
3217 | * quoted strings ('', ``, "") and nested constructs. It also must handle | |
95732b49 JA |
3218 | * reprompting the user, if necessary, after reading a newline, and returning |
3219 | * correct error values if it reads EOF. | |
7117c2d2 | 3220 | */ |
495aee44 CR |
3221 | #define P_FIRSTCLOSE 0x0001 |
3222 | #define P_ALLOWESC 0x0002 | |
3223 | #define P_DQUOTE 0x0004 | |
3224 | #define P_COMMAND 0x0008 /* parsing a command, so look for comments */ | |
3225 | #define P_BACKQUOTE 0x0010 /* parsing a backquoted command substitution */ | |
3226 | #define P_ARRAYSUB 0x0020 /* parsing a [...] array subscript for assignment */ | |
3227 | #define P_DOLBRACE 0x0040 /* parsing a ${...} construct */ | |
b72432fd | 3228 | |
3185942a JA |
3229 | /* Lexical state while parsing a grouping construct or $(...). */ |
3230 | #define LEX_WASDOL 0x001 | |
3231 | #define LEX_CKCOMMENT 0x002 | |
3232 | #define LEX_INCOMMENT 0x004 | |
3233 | #define LEX_PASSNEXT 0x008 | |
3234 | #define LEX_RESWDOK 0x010 | |
3235 | #define LEX_CKCASE 0x020 | |
3236 | #define LEX_INCASE 0x040 | |
3237 | #define LEX_INHEREDOC 0x080 | |
3238 | #define LEX_HEREDELIM 0x100 /* reading here-doc delimiter */ | |
3239 | #define LEX_STRIPDOC 0x200 /* <<- strip tabs from here doc delim */ | |
89a92869 | 3240 | #define LEX_INWORD 0x400 |
3185942a JA |
3241 | |
3242 | #define COMSUB_META(ch) ((ch) == ';' || (ch) == '&' || (ch) == '|') | |
3243 | ||
3244 | #define CHECK_NESTRET_ERROR() \ | |
3245 | do { \ | |
3246 | if (nestret == &matched_pair_error) \ | |
3247 | { \ | |
3248 | free (ret); \ | |
3249 | return &matched_pair_error; \ | |
3250 | } \ | |
3251 | } while (0) | |
3252 | ||
3253 | #define APPEND_NESTRET() \ | |
3254 | do { \ | |
3255 | if (nestlen) \ | |
3256 | { \ | |
3257 | RESIZE_MALLOCED_BUFFER (ret, retind, nestlen, retsize, 64); \ | |
3258 | strcpy (ret + retind, nestret); \ | |
3259 | retind += nestlen; \ | |
3260 | } \ | |
3261 | } while (0) | |
3262 | ||
ccc6cda3 | 3263 | static char matched_pair_error; |
3185942a | 3264 | |
ccc6cda3 JA |
3265 | static char * |
3266 | parse_matched_pair (qc, open, close, lenp, flags) | |
3267 | int qc; /* `"' if this construct is within double quotes */ | |
3268 | int open, close; | |
3269 | int *lenp, flags; | |
3270 | { | |
3185942a JA |
3271 | int count, ch, tflags; |
3272 | int nestlen, ttranslen, start_lineno; | |
28ef6c31 | 3273 | char *ret, *nestret, *ttrans; |
b80f6443 | 3274 | int retind, retsize, rflags; |
495aee44 CR |
3275 | int dolbrace_state; |
3276 | ||
3277 | dolbrace_state = (flags & P_DOLBRACE) ? DOLBRACE_PARAM : 0; | |
726f6388 | 3278 | |
0001803f | 3279 | /*itrace("parse_matched_pair[%d]: open = %c close = %c flags = %d", line_number, open, close, flags);*/ |
ccc6cda3 | 3280 | count = 1; |
3185942a JA |
3281 | tflags = 0; |
3282 | ||
3283 | if ((flags & P_COMMAND) && qc != '`' && qc != '\'' && qc != '"' && (flags & P_DQUOTE) == 0) | |
3284 | tflags |= LEX_CKCOMMENT; | |
726f6388 | 3285 | |
b80f6443 JA |
3286 | /* RFLAGS is the set of flags we want to pass to recursive calls. */ |
3287 | rflags = (qc == '"') ? P_DQUOTE : (flags & P_DQUOTE); | |
3288 | ||
f73dda09 | 3289 | ret = (char *)xmalloc (retsize = 64); |
ccc6cda3 | 3290 | retind = 0; |
726f6388 | 3291 | |
ccc6cda3 JA |
3292 | start_lineno = line_number; |
3293 | while (count) | |
3294 | { | |
495aee44 | 3295 | ch = shell_getc (qc != '\'' && (tflags & (LEX_PASSNEXT)) == 0); |
0628567a | 3296 | |
ccc6cda3 JA |
3297 | if (ch == EOF) |
3298 | { | |
3299 | free (ret); | |
b80f6443 | 3300 | parser_error (start_lineno, _("unexpected EOF while looking for matching `%c'"), close); |
ccc6cda3 JA |
3301 | EOF_Reached = 1; /* XXX */ |
3302 | return (&matched_pair_error); | |
3303 | } | |
726f6388 | 3304 | |
ccc6cda3 | 3305 | /* Possible reprompting. */ |
b80f6443 | 3306 | if (ch == '\n' && SHOULD_PROMPT ()) |
ccc6cda3 | 3307 | prompt_again (); |
726f6388 | 3308 | |
3185942a JA |
3309 | /* Don't bother counting parens or doing anything else if in a comment |
3310 | or part of a case statement */ | |
3311 | if (tflags & LEX_INCOMMENT) | |
95732b49 JA |
3312 | { |
3313 | /* Add this character. */ | |
3314 | RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64); | |
3315 | ret[retind++] = ch; | |
3316 | ||
3317 | if (ch == '\n') | |
3185942a | 3318 | tflags &= ~LEX_INCOMMENT; |
95732b49 JA |
3319 | |
3320 | continue; | |
3321 | } | |
3185942a | 3322 | |
0628567a JA |
3323 | /* Not exactly right yet, should handle shell metacharacters, too. If |
3324 | any changes are made to this test, make analogous changes to subst.c: | |
3325 | extract_delimited_string(). */ | |
3185942a JA |
3326 | else if MBTEST((tflags & LEX_CKCOMMENT) && (tflags & LEX_INCOMMENT) == 0 && ch == '#' && (retind == 0 || ret[retind-1] == '\n' || shellblank (ret[retind - 1]))) |
3327 | tflags |= LEX_INCOMMENT; | |
0628567a | 3328 | |
3185942a | 3329 | if (tflags & LEX_PASSNEXT) /* last char was backslash */ |
ccc6cda3 | 3330 | { |
3185942a | 3331 | tflags &= ~LEX_PASSNEXT; |
ccc6cda3 JA |
3332 | if (qc != '\'' && ch == '\n') /* double-quoted \<newline> disappears. */ |
3333 | { | |
3185942a JA |
3334 | if (retind > 0) |
3335 | retind--; /* swallow previously-added backslash */ | |
ccc6cda3 JA |
3336 | continue; |
3337 | } | |
726f6388 | 3338 | |
ccc6cda3 | 3339 | RESIZE_MALLOCED_BUFFER (ret, retind, 2, retsize, 64); |
ac50fbac | 3340 | if MBTEST(ch == CTLESC) |
ccc6cda3 JA |
3341 | ret[retind++] = CTLESC; |
3342 | ret[retind++] = ch; | |
3343 | continue; | |
3344 | } | |
3185942a JA |
3345 | /* If we're reparsing the input (e.g., from parse_string_to_word_list), |
3346 | we've already prepended CTLESC to single-quoted results of $'...'. | |
3347 | We may want to do this for other CTLESC-quoted characters in | |
3348 | reparse, too. */ | |
3349 | else if MBTEST((parser_state & PST_REPARSE) && open == '\'' && (ch == CTLESC || ch == CTLNUL)) | |
3350 | { | |
3351 | RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64); | |
3352 | ret[retind++] = ch; | |
3353 | continue; | |
3354 | } | |
7117c2d2 | 3355 | else if MBTEST(ch == CTLESC || ch == CTLNUL) /* special shell escapes */ |
ccc6cda3 JA |
3356 | { |
3357 | RESIZE_MALLOCED_BUFFER (ret, retind, 2, retsize, 64); | |
3358 | ret[retind++] = CTLESC; | |
3359 | ret[retind++] = ch; | |
3360 | continue; | |
3361 | } | |
7117c2d2 | 3362 | else if MBTEST(ch == close) /* ending delimiter */ |
ccc6cda3 | 3363 | count--; |
bb70624e | 3364 | /* handle nested ${...} specially. */ |
3185942a | 3365 | else if MBTEST(open != close && (tflags & LEX_WASDOL) && open == '{' && ch == open) /* } */ |
28ef6c31 | 3366 | count++; |
7117c2d2 | 3367 | else if MBTEST(((flags & P_FIRSTCLOSE) == 0) && ch == open) /* nested begin */ |
ccc6cda3 | 3368 | count++; |
726f6388 | 3369 | |
ccc6cda3 JA |
3370 | /* Add this character. */ |
3371 | RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64); | |
3372 | ret[retind++] = ch; | |
726f6388 | 3373 | |
3185942a JA |
3374 | /* If we just read the ending character, don't bother continuing. */ |
3375 | if (count == 0) | |
3376 | break; | |
3377 | ||
ccc6cda3 | 3378 | if (open == '\'') /* '' inside grouping construct */ |
bb70624e | 3379 | { |
7117c2d2 | 3380 | if MBTEST((flags & P_ALLOWESC) && ch == '\\') |
3185942a | 3381 | tflags |= LEX_PASSNEXT; |
bb70624e JA |
3382 | continue; |
3383 | } | |
726f6388 | 3384 | |
7117c2d2 | 3385 | if MBTEST(ch == '\\') /* backslashes */ |
3185942a JA |
3386 | tflags |= LEX_PASSNEXT; |
3387 | ||
495aee44 CR |
3388 | /* Based on which dolstate is currently in (param, op, or word), |
3389 | decide what the op is. We're really only concerned if it's % or | |
3390 | #, so we can turn on a flag that says whether or not we should | |
3391 | treat single quotes as special when inside a double-quoted | |
3392 | ${...}. This logic must agree with subst.c:extract_dollar_brace_string | |
3393 | since they share the same defines. */ | |
ac50fbac | 3394 | /* FLAG POSIX INTERP 221 */ |
495aee44 CR |
3395 | if (flags & P_DOLBRACE) |
3396 | { | |
3397 | /* ${param%[%]word} */ | |
3398 | if MBTEST(dolbrace_state == DOLBRACE_PARAM && ch == '%' && retind > 1) | |
3399 | dolbrace_state = DOLBRACE_QUOTE; | |
3400 | /* ${param#[#]word} */ | |
3401 | else if MBTEST(dolbrace_state == DOLBRACE_PARAM && ch == '#' && retind > 1) | |
3402 | dolbrace_state = DOLBRACE_QUOTE; | |
3403 | /* ${param/[/]pat/rep} */ | |
3404 | else if MBTEST(dolbrace_state == DOLBRACE_PARAM && ch == '/' && retind > 1) | |
ac50fbac | 3405 | dolbrace_state = DOLBRACE_QUOTE2; /* XXX */ |
495aee44 CR |
3406 | /* ${param^[^]pat} */ |
3407 | else if MBTEST(dolbrace_state == DOLBRACE_PARAM && ch == '^' && retind > 1) | |
3408 | dolbrace_state = DOLBRACE_QUOTE; | |
3409 | /* ${param,[,]pat} */ | |
3410 | else if MBTEST(dolbrace_state == DOLBRACE_PARAM && ch == ',' && retind > 1) | |
3411 | dolbrace_state = DOLBRACE_QUOTE; | |
3412 | else if MBTEST(dolbrace_state == DOLBRACE_PARAM && strchr ("#%^,~:-=?+/", ch) != 0) | |
3413 | dolbrace_state = DOLBRACE_OP; | |
3414 | else if MBTEST(dolbrace_state == DOLBRACE_OP && strchr ("#%^,~:-=?+/", ch) == 0) | |
3415 | dolbrace_state = DOLBRACE_WORD; | |
3416 | } | |
3417 | ||
3185942a | 3418 | /* The big hammer. Single quotes aren't special in double quotes. The |
495aee44 | 3419 | problem is that Posix used to say the single quotes are semi-special: |
3185942a JA |
3420 | within a double-quoted ${...} construct "an even number of |
3421 | unescaped double-quotes or single-quotes, if any, shall occur." */ | |
495aee44 | 3422 | /* This was changed in Austin Group Interp 221 */ |
bc63a081 | 3423 | if MBTEST(posixly_correct && shell_compatibility_level > 41 && dolbrace_state != DOLBRACE_QUOTE && dolbrace_state != DOLBRACE_QUOTE2 && (flags & P_DQUOTE) && (flags & P_DOLBRACE) && ch == '\'') |
3185942a | 3424 | continue; |
726f6388 | 3425 | |
3185942a JA |
3426 | /* Could also check open == '`' if we want to parse grouping constructs |
3427 | inside old-style command substitution. */ | |
ccc6cda3 JA |
3428 | if (open != close) /* a grouping construct */ |
3429 | { | |
7117c2d2 | 3430 | if MBTEST(shellquote (ch)) |
ccc6cda3 JA |
3431 | { |
3432 | /* '', ``, or "" inside $(...) or other grouping construct. */ | |
3433 | push_delimiter (dstack, ch); | |
3185942a | 3434 | if MBTEST((tflags & LEX_WASDOL) && ch == '\'') /* $'...' inside group */ |
b80f6443 | 3435 | nestret = parse_matched_pair (ch, ch, ch, &nestlen, P_ALLOWESC|rflags); |
28ef6c31 | 3436 | else |
b80f6443 | 3437 | nestret = parse_matched_pair (ch, ch, ch, &nestlen, rflags); |
ccc6cda3 | 3438 | pop_delimiter (dstack); |
3185942a JA |
3439 | CHECK_NESTRET_ERROR (); |
3440 | ||
3441 | if MBTEST((tflags & LEX_WASDOL) && ch == '\'' && (extended_quote || (rflags & P_DQUOTE) == 0)) | |
28ef6c31 JA |
3442 | { |
3443 | /* Translate $'...' here. */ | |
3444 | ttrans = ansiexpand (nestret, 0, nestlen - 1, &ttranslen); | |
f73dda09 | 3445 | xfree (nestret); |
95732b49 | 3446 | |
ac50fbac CR |
3447 | /* If we're parsing a double-quoted brace expansion and we are |
3448 | not in a place where single quotes are treated specially, | |
3449 | make sure we single-quote the results of the ansi | |
3450 | expansion because quote removal should remove them later */ | |
3451 | /* FLAG POSIX INTERP 221 */ | |
3452 | if ((shell_compatibility_level > 42) && (rflags & P_DQUOTE) && (dolbrace_state == DOLBRACE_QUOTE2) && (flags & P_DOLBRACE)) | |
3453 | { | |
3454 | nestret = sh_single_quote (ttrans); | |
3455 | free (ttrans); | |
3456 | nestlen = strlen (nestret); | |
3457 | } | |
3458 | else if ((rflags & P_DQUOTE) == 0) | |
95732b49 JA |
3459 | { |
3460 | nestret = sh_single_quote (ttrans); | |
3461 | free (ttrans); | |
3462 | nestlen = strlen (nestret); | |
3463 | } | |
3464 | else | |
3465 | { | |
3466 | nestret = ttrans; | |
3467 | nestlen = ttranslen; | |
3468 | } | |
28ef6c31 JA |
3469 | retind -= 2; /* back up before the $' */ |
3470 | } | |
3185942a | 3471 | else if MBTEST((tflags & LEX_WASDOL) && ch == '"' && (extended_quote || (rflags & P_DQUOTE) == 0)) |
28ef6c31 JA |
3472 | { |
3473 | /* Locale expand $"..." here. */ | |
3474 | ttrans = localeexpand (nestret, 0, nestlen - 1, start_lineno, &ttranslen); | |
f73dda09 | 3475 | xfree (nestret); |
95732b49 JA |
3476 | |
3477 | nestret = sh_mkdoublequoted (ttrans, ttranslen, 0); | |
28ef6c31 | 3478 | free (ttrans); |
95732b49 | 3479 | nestlen = ttranslen + 2; |
28ef6c31 JA |
3480 | retind -= 2; /* back up before the $" */ |
3481 | } | |
7117c2d2 | 3482 | |
3185942a | 3483 | APPEND_NESTRET (); |
ccc6cda3 JA |
3484 | FREE (nestret); |
3485 | } | |
89a92869 CR |
3486 | else if ((flags & P_ARRAYSUB) && (tflags & LEX_WASDOL) && (ch == '(' || ch == '{' || ch == '[')) /* ) } ] */ |
3487 | goto parse_dollar_word; | |
ccc6cda3 JA |
3488 | } |
3489 | /* Parse an old-style command substitution within double quotes as a | |
3490 | single word. */ | |
3491 | /* XXX - sh and ksh93 don't do this - XXX */ | |
7117c2d2 | 3492 | else if MBTEST(open == '"' && ch == '`') |
ccc6cda3 | 3493 | { |
b80f6443 | 3494 | nestret = parse_matched_pair (0, '`', '`', &nestlen, rflags); |
3185942a JA |
3495 | |
3496 | CHECK_NESTRET_ERROR (); | |
3497 | APPEND_NESTRET (); | |
3498 | ||
3499 | FREE (nestret); | |
3500 | } | |
3501 | else if MBTEST(open != '`' && (tflags & LEX_WASDOL) && (ch == '(' || ch == '{' || ch == '[')) /* ) } ] */ | |
3502 | /* check for $(), $[], or ${} inside quoted string. */ | |
3503 | { | |
89a92869 | 3504 | parse_dollar_word: |
3185942a JA |
3505 | if (open == ch) /* undo previous increment */ |
3506 | count--; | |
3507 | if (ch == '(') /* ) */ | |
3508 | nestret = parse_comsub (0, '(', ')', &nestlen, (rflags|P_COMMAND) & ~P_DQUOTE); | |
3509 | else if (ch == '{') /* } */ | |
495aee44 | 3510 | nestret = parse_matched_pair (0, '{', '}', &nestlen, P_FIRSTCLOSE|P_DOLBRACE|rflags); |
3185942a JA |
3511 | else if (ch == '[') /* ] */ |
3512 | nestret = parse_matched_pair (0, '[', ']', &nestlen, rflags); | |
3513 | ||
3514 | CHECK_NESTRET_ERROR (); | |
3515 | APPEND_NESTRET (); | |
3516 | ||
3517 | FREE (nestret); | |
3518 | } | |
3519 | if MBTEST(ch == '$') | |
3520 | tflags |= LEX_WASDOL; | |
3521 | else | |
3522 | tflags &= ~LEX_WASDOL; | |
3523 | } | |
3524 | ||
3525 | ret[retind] = '\0'; | |
3526 | if (lenp) | |
3527 | *lenp = retind; | |
0001803f | 3528 | /*itrace("parse_matched_pair[%d]: returning %s", line_number, ret);*/ |
3185942a JA |
3529 | return ret; |
3530 | } | |
3531 | ||
3532 | /* Parse a $(...) command substitution. This is messier than I'd like, and | |
3533 | reproduces a lot more of the token-reading code than I'd like. */ | |
3534 | static char * | |
3535 | parse_comsub (qc, open, close, lenp, flags) | |
3536 | int qc; /* `"' if this construct is within double quotes */ | |
3537 | int open, close; | |
3538 | int *lenp, flags; | |
3539 | { | |
89a92869 | 3540 | int count, ch, peekc, tflags, lex_rwlen, lex_wlen, lex_firstind; |
3185942a JA |
3541 | int nestlen, ttranslen, start_lineno; |
3542 | char *ret, *nestret, *ttrans, *heredelim; | |
3543 | int retind, retsize, rflags, hdlen; | |
3544 | ||
495aee44 CR |
3545 | /* Posix interp 217 says arithmetic expressions have precedence, so |
3546 | assume $(( introduces arithmetic expansion and parse accordingly. */ | |
3547 | peekc = shell_getc (0); | |
3548 | shell_ungetc (peekc); | |
3549 | if (peekc == '(') | |
3550 | return (parse_matched_pair (qc, open, close, lenp, 0)); | |
3551 | ||
3185942a JA |
3552 | /*itrace("parse_comsub: qc = `%c' open = %c close = %c", qc, open, close);*/ |
3553 | count = 1; | |
3554 | tflags = LEX_RESWDOK; | |
3555 | ||
3556 | if ((flags & P_COMMAND) && qc != '\'' && qc != '"' && (flags & P_DQUOTE) == 0) | |
3557 | tflags |= LEX_CKCASE; | |
3558 | if ((tflags & LEX_CKCASE) && (interactive == 0 || interactive_comments)) | |
3559 | tflags |= LEX_CKCOMMENT; | |
3560 | ||
3561 | /* RFLAGS is the set of flags we want to pass to recursive calls. */ | |
3562 | rflags = (flags & P_DQUOTE); | |
3563 | ||
3564 | ret = (char *)xmalloc (retsize = 64); | |
3565 | retind = 0; | |
3566 | ||
3567 | start_lineno = line_number; | |
89a92869 | 3568 | lex_rwlen = lex_wlen = 0; |
3185942a JA |
3569 | |
3570 | heredelim = 0; | |
3571 | lex_firstind = -1; | |
3572 | ||
3573 | while (count) | |
3574 | { | |
3575 | comsub_readchar: | |
495aee44 | 3576 | ch = shell_getc (qc != '\'' && (tflags & (LEX_INCOMMENT|LEX_PASSNEXT)) == 0); |
3185942a JA |
3577 | |
3578 | if (ch == EOF) | |
3579 | { | |
3580 | eof_error: | |
3581 | free (ret); | |
3582 | FREE (heredelim); | |
3583 | parser_error (start_lineno, _("unexpected EOF while looking for matching `%c'"), close); | |
3584 | EOF_Reached = 1; /* XXX */ | |
3585 | return (&matched_pair_error); | |
3586 | } | |
3587 | ||
3588 | /* If we hit the end of a line and are reading the contents of a here | |
3589 | document, and it's not the same line that the document starts on, | |
3590 | check for this line being the here doc delimiter. Otherwise, if | |
3591 | we're in a here document, mark the next character as the beginning | |
3592 | of a line. */ | |
3593 | if (ch == '\n') | |
3594 | { | |
3595 | if ((tflags & LEX_HEREDELIM) && heredelim) | |
ccc6cda3 | 3596 | { |
3185942a JA |
3597 | tflags &= ~LEX_HEREDELIM; |
3598 | tflags |= LEX_INHEREDOC; | |
3599 | lex_firstind = retind + 1; | |
ccc6cda3 | 3600 | } |
3185942a | 3601 | else if (tflags & LEX_INHEREDOC) |
ccc6cda3 | 3602 | { |
3185942a JA |
3603 | int tind; |
3604 | tind = lex_firstind; | |
3605 | while ((tflags & LEX_STRIPDOC) && ret[tind] == '\t') | |
3606 | tind++; | |
3607 | if (STREQN (ret + tind, heredelim, hdlen)) | |
3608 | { | |
3609 | tflags &= ~(LEX_STRIPDOC|LEX_INHEREDOC); | |
3610 | /*itrace("parse_comsub:%d: found here doc end `%s'", line_number, ret + tind);*/ | |
0001803f CR |
3611 | free (heredelim); |
3612 | heredelim = 0; | |
3185942a JA |
3613 | lex_firstind = -1; |
3614 | } | |
3615 | else | |
3616 | lex_firstind = retind + 1; | |
ccc6cda3 | 3617 | } |
ccc6cda3 | 3618 | } |
3185942a JA |
3619 | |
3620 | /* Possible reprompting. */ | |
3621 | if (ch == '\n' && SHOULD_PROMPT ()) | |
3622 | prompt_again (); | |
3623 | ||
0001803f CR |
3624 | /* XXX -- possibly allow here doc to be delimited by ending right |
3625 | paren. */ | |
3626 | if ((tflags & LEX_INHEREDOC) && ch == close && count == 1) | |
3627 | { | |
3628 | int tind; | |
3629 | /*itrace("parse_comsub: in here doc, ch == close, retind - firstind = %d hdlen = %d retind = %d", retind-lex_firstind, hdlen, retind);*/ | |
3630 | tind = lex_firstind; | |
3631 | while ((tflags & LEX_STRIPDOC) && ret[tind] == '\t') | |
3632 | tind++; | |
3633 | if (retind-tind == hdlen && STREQN (ret + tind, heredelim, hdlen)) | |
3634 | { | |
3635 | tflags &= ~(LEX_STRIPDOC|LEX_INHEREDOC); | |
3636 | /*itrace("parse_comsub:%d: found here doc end `%s'", line_number, ret + tind);*/ | |
3637 | free (heredelim); | |
3638 | heredelim = 0; | |
3639 | lex_firstind = -1; | |
3640 | } | |
3641 | } | |
3642 | ||
3185942a JA |
3643 | /* Don't bother counting parens or doing anything else if in a comment */ |
3644 | if (tflags & (LEX_INCOMMENT|LEX_INHEREDOC)) | |
3645 | { | |
3646 | /* Add this character. */ | |
3647 | RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64); | |
3648 | ret[retind++] = ch; | |
3649 | ||
3650 | if ((tflags & LEX_INCOMMENT) && ch == '\n') | |
ac50fbac | 3651 | { |
0001803f | 3652 | /*itrace("parse_comsub:%d: lex_incomment -> 0 ch = `%c'", line_number, ch);*/ |
ac50fbac CR |
3653 | tflags &= ~LEX_INCOMMENT; |
3654 | } | |
3185942a JA |
3655 | |
3656 | continue; | |
3657 | } | |
3658 | ||
89a92869 CR |
3659 | if (tflags & LEX_PASSNEXT) /* last char was backslash */ |
3660 | { | |
3661 | /*itrace("parse_comsub:%d: lex_passnext -> 0 ch = `%c' (%d)", line_number, ch, __LINE__);*/ | |
3662 | tflags &= ~LEX_PASSNEXT; | |
3663 | if (qc != '\'' && ch == '\n') /* double-quoted \<newline> disappears. */ | |
3664 | { | |
3665 | if (retind > 0) | |
3666 | retind--; /* swallow previously-added backslash */ | |
3667 | continue; | |
3668 | } | |
3669 | ||
3670 | RESIZE_MALLOCED_BUFFER (ret, retind, 2, retsize, 64); | |
ac50fbac | 3671 | if MBTEST(ch == CTLESC) |
89a92869 CR |
3672 | ret[retind++] = CTLESC; |
3673 | ret[retind++] = ch; | |
3674 | continue; | |
3675 | } | |
3676 | ||
3677 | /* If this is a shell break character, we are not in a word. If not, | |
3678 | we either start or continue a word. */ | |
3679 | if MBTEST(shellbreak (ch)) | |
3680 | { | |
3681 | tflags &= ~LEX_INWORD; | |
3682 | /*itrace("parse_comsub:%d: lex_inword -> 0 ch = `%c' (%d)", line_number, ch, __LINE__);*/ | |
3683 | } | |
3684 | else | |
3685 | { | |
3686 | if (tflags & LEX_INWORD) | |
3687 | { | |
3688 | lex_wlen++; | |
3689 | /*itrace("parse_comsub:%d: lex_inword == 1 ch = `%c' lex_wlen = %d (%d)", line_number, ch, lex_wlen, __LINE__);*/ | |
3690 | } | |
3691 | else | |
3692 | { | |
3693 | /*itrace("parse_comsub:%d: lex_inword -> 1 ch = `%c' (%d)", line_number, ch, __LINE__);*/ | |
3694 | tflags |= LEX_INWORD; | |
3695 | lex_wlen = 0; | |
3696 | } | |
3697 | } | |
3698 | ||
3185942a | 3699 | /* Skip whitespace */ |
495aee44 | 3700 | if MBTEST(shellblank (ch) && (tflags & LEX_HEREDELIM) == 0 && lex_rwlen == 0) |
3185942a JA |
3701 | { |
3702 | /* Add this character. */ | |
3703 | RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64); | |
3704 | ret[retind++] = ch; | |
3705 | continue; | |
3706 | } | |
3707 | ||
3708 | /* Either we are looking for the start of the here-doc delimiter | |
3709 | (lex_firstind == -1) or we are reading one (lex_firstind >= 0). | |
3710 | If this character is a shell break character and we are reading | |
3711 | the delimiter, save it and note that we are now reading a here | |
3712 | document. If we've found the start of the delimiter, note it by | |
3713 | setting lex_firstind. Backslashes can quote shell metacharacters | |
3714 | in here-doc delimiters. */ | |
3715 | if (tflags & LEX_HEREDELIM) | |
3716 | { | |
3717 | if (lex_firstind == -1 && shellbreak (ch) == 0) | |
3718 | lex_firstind = retind; | |
0001803f CR |
3719 | #if 0 |
3720 | else if (heredelim && (tflags & LEX_PASSNEXT) == 0 && ch == '\n') | |
3721 | { | |
3722 | tflags |= LEX_INHEREDOC; | |
3723 | tflags &= ~LEX_HEREDELIM; | |
3724 | lex_firstind = retind + 1; | |
3725 | } | |
3726 | #endif | |
3185942a JA |
3727 | else if (lex_firstind >= 0 && (tflags & LEX_PASSNEXT) == 0 && shellbreak (ch)) |
3728 | { | |
0001803f CR |
3729 | if (heredelim == 0) |
3730 | { | |
3731 | nestret = substring (ret, lex_firstind, retind); | |
3732 | heredelim = string_quote_removal (nestret, 0); | |
3733 | free (nestret); | |
3734 | hdlen = STRLEN(heredelim); | |
3185942a | 3735 | /*itrace("parse_comsub:%d: found here doc delimiter `%s' (%d)", line_number, heredelim, hdlen);*/ |
0001803f | 3736 | } |
3185942a JA |
3737 | if (ch == '\n') |
3738 | { | |
3739 | tflags |= LEX_INHEREDOC; | |
3740 | tflags &= ~LEX_HEREDELIM; | |
3741 | lex_firstind = retind + 1; | |
3742 | } | |
3743 | else | |
3744 | lex_firstind = -1; | |
3745 | } | |
3746 | } | |
3747 | ||
3748 | /* Meta-characters that can introduce a reserved word. Not perfect yet. */ | |
89a92869 | 3749 | if MBTEST((tflags & LEX_RESWDOK) == 0 && (tflags & LEX_CKCASE) && (tflags & LEX_INCOMMENT) == 0 && (shellmeta(ch) || ch == '\n')) |
95732b49 | 3750 | { |
3185942a JA |
3751 | /* Add this character. */ |
3752 | RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64); | |
3753 | ret[retind++] = ch; | |
3754 | peekc = shell_getc (1); | |
3755 | if (ch == peekc && (ch == '&' || ch == '|' || ch == ';')) /* two-character tokens */ | |
3756 | { | |
3757 | RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64); | |
3758 | ret[retind++] = peekc; | |
0001803f | 3759 | /*itrace("parse_comsub:%d: set lex_reswordok = 1, ch = `%c'", line_number, ch);*/ |
3185942a JA |
3760 | tflags |= LEX_RESWDOK; |
3761 | lex_rwlen = 0; | |
3762 | continue; | |
3763 | } | |
3764 | else if (ch == '\n' || COMSUB_META(ch)) | |
3765 | { | |
3766 | shell_ungetc (peekc); | |
3185942a | 3767 | /*itrace("parse_comsub:%d: set lex_reswordok = 1, ch = `%c'", line_number, ch);*/ |
0001803f | 3768 | tflags |= LEX_RESWDOK; |
3185942a JA |
3769 | lex_rwlen = 0; |
3770 | continue; | |
3771 | } | |
3772 | else if (ch == EOF) | |
3773 | goto eof_error; | |
3774 | else | |
3775 | { | |
3776 | /* `unget' the character we just added and fall through */ | |
3777 | retind--; | |
3778 | shell_ungetc (peekc); | |
3779 | } | |
95732b49 | 3780 | } |
3185942a JA |
3781 | |
3782 | /* If we can read a reserved word, try to read one. */ | |
3783 | if (tflags & LEX_RESWDOK) | |
3784 | { | |
3785 | if MBTEST(islower (ch)) | |
3786 | { | |
3787 | /* Add this character. */ | |
3788 | RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64); | |
3789 | ret[retind++] = ch; | |
3790 | lex_rwlen++; | |
3791 | continue; | |
3792 | } | |
3793 | else if MBTEST(lex_rwlen == 4 && shellbreak (ch)) | |
3794 | { | |
3795 | if (STREQN (ret + retind - 4, "case", 4)) | |
ac50fbac CR |
3796 | { |
3797 | tflags |= LEX_INCASE; | |
0001803f | 3798 | /*itrace("parse_comsub:%d: found `case', lex_incase -> 1 lex_reswdok -> 0", line_number);*/ |
ac50fbac | 3799 | } |
3185942a | 3800 | else if (STREQN (ret + retind - 4, "esac", 4)) |
ac50fbac CR |
3801 | { |
3802 | tflags &= ~LEX_INCASE; | |
0001803f | 3803 | /*itrace("parse_comsub:%d: found `esac', lex_incase -> 0 lex_reswdok -> 0", line_number);*/ |
ac50fbac | 3804 | } |
3185942a JA |
3805 | tflags &= ~LEX_RESWDOK; |
3806 | } | |
89a92869 CR |
3807 | else if MBTEST((tflags & LEX_CKCOMMENT) && ch == '#' && (lex_rwlen == 0 || ((tflags & LEX_INWORD) && lex_wlen == 0))) |
3808 | ; /* don't modify LEX_RESWDOK if we're starting a comment */ | |
ac50fbac CR |
3809 | /* Allow `do' followed by space, tab, or newline to preserve the |
3810 | RESWDOK flag, but reset the reserved word length counter so we | |
3811 | can read another one. */ | |
3812 | else if MBTEST(((tflags & LEX_INCASE) == 0) && | |
3813 | (isblank(ch) || ch == '\n') && | |
3814 | lex_rwlen == 2 && | |
3815 | STREQN (ret + retind - 2, "do", 2)) | |
3816 | { | |
3817 | /*itrace("parse_comsub:%d: lex_incase == 1 found `%c', found \"do\"", line_number, ch);*/ | |
3818 | lex_rwlen = 0; | |
3819 | } | |
89a92869 CR |
3820 | else if MBTEST((tflags & LEX_INCASE) && ch != '\n') |
3821 | /* If we can read a reserved word and we're in case, we're at the | |
3822 | point where we can read a new pattern list or an esac. We | |
3823 | handle the esac case above. If we read a newline, we want to | |
3824 | leave LEX_RESWDOK alone. If we read anything else, we want to | |
3825 | turn off LEX_RESWDOK, since we're going to read a pattern list. */ | |
ac50fbac CR |
3826 | { |
3827 | tflags &= ~LEX_RESWDOK; | |
89a92869 | 3828 | /*itrace("parse_comsub:%d: lex_incase == 1 found `%c', lex_reswordok -> 0", line_number, ch);*/ |
ac50fbac | 3829 | } |
89a92869 | 3830 | else if MBTEST(shellbreak (ch) == 0) |
ac50fbac CR |
3831 | { |
3832 | tflags &= ~LEX_RESWDOK; | |
3185942a | 3833 | /*itrace("parse_comsub:%d: found `%c', lex_reswordok -> 0", line_number, ch);*/ |
ac50fbac CR |
3834 | } |
3835 | #if 0 | |
3836 | /* If we find a space or tab but have read something and it's not | |
3837 | `do', turn off the reserved-word-ok flag */ | |
3838 | else if MBTEST(isblank (ch) && lex_rwlen > 0) | |
3839 | { | |
3840 | tflags &= ~LEX_RESWDOK; | |
3841 | /*itrace("parse_comsub:%d: found `%c', lex_reswordok -> 0", line_number, ch);*/ | |
3842 | } | |
3843 | #endif | |
3185942a JA |
3844 | } |
3845 | ||
0001803f | 3846 | /* Might be the start of a here-doc delimiter */ |
3185942a JA |
3847 | if MBTEST((tflags & LEX_INCOMMENT) == 0 && (tflags & LEX_CKCASE) && ch == '<') |
3848 | { | |
3849 | /* Add this character. */ | |
3850 | RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64); | |
3851 | ret[retind++] = ch; | |
3852 | peekc = shell_getc (1); | |
3853 | if (peekc == EOF) | |
3854 | goto eof_error; | |
3855 | if (peekc == ch) | |
3856 | { | |
3857 | RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64); | |
3858 | ret[retind++] = peekc; | |
3859 | peekc = shell_getc (1); | |
3860 | if (peekc == EOF) | |
3861 | goto eof_error; | |
3862 | if (peekc == '-') | |
3863 | { | |
3864 | RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64); | |
3865 | ret[retind++] = peekc; | |
3866 | tflags |= LEX_STRIPDOC; | |
3867 | } | |
3868 | else | |
3869 | shell_ungetc (peekc); | |
89a92869 CR |
3870 | if (peekc != '<') |
3871 | { | |
3872 | tflags |= LEX_HEREDELIM; | |
3873 | lex_firstind = -1; | |
3874 | } | |
3185942a JA |
3875 | continue; |
3876 | } | |
3877 | else | |
89a92869 | 3878 | ch = peekc; /* fall through and continue XXX */ |
3185942a | 3879 | } |
89a92869 | 3880 | else if MBTEST((tflags & LEX_CKCOMMENT) && (tflags & LEX_INCOMMENT) == 0 && ch == '#' && (((tflags & LEX_RESWDOK) && lex_rwlen == 0) || ((tflags & LEX_INWORD) && lex_wlen == 0))) |
ac50fbac | 3881 | { |
89a92869 | 3882 | /*itrace("parse_comsub:%d: lex_incomment -> 1 (%d)", line_number, __LINE__);*/ |
ac50fbac CR |
3883 | tflags |= LEX_INCOMMENT; |
3884 | } | |
3185942a | 3885 | |
89a92869 | 3886 | if MBTEST(ch == CTLESC || ch == CTLNUL) /* special shell escapes */ |
3185942a JA |
3887 | { |
3888 | RESIZE_MALLOCED_BUFFER (ret, retind, 2, retsize, 64); | |
3889 | ret[retind++] = CTLESC; | |
3890 | ret[retind++] = ch; | |
3891 | continue; | |
3892 | } | |
3893 | #if 0 | |
3894 | else if MBTEST((tflags & LEX_INCASE) && ch == close && close == ')') | |
3895 | tflags &= ~LEX_INCASE; /* XXX */ | |
0628567a | 3896 | #endif |
3185942a | 3897 | else if MBTEST(ch == close && (tflags & LEX_INCASE) == 0) /* ending delimiter */ |
ac50fbac CR |
3898 | { |
3899 | count--; | |
3185942a | 3900 | /*itrace("parse_comsub:%d: found close: count = %d", line_number, count);*/ |
ac50fbac | 3901 | } |
3185942a | 3902 | else if MBTEST(((flags & P_FIRSTCLOSE) == 0) && (tflags & LEX_INCASE) == 0 && ch == open) /* nested begin */ |
ac50fbac CR |
3903 | { |
3904 | count++; | |
0001803f | 3905 | /*itrace("parse_comsub:%d: found open: count = %d", line_number, count);*/ |
ac50fbac | 3906 | } |
3185942a JA |
3907 | |
3908 | /* Add this character. */ | |
3909 | RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64); | |
3910 | ret[retind++] = ch; | |
3911 | ||
3912 | /* If we just read the ending character, don't bother continuing. */ | |
3913 | if (count == 0) | |
3914 | break; | |
3915 | ||
3916 | if MBTEST(ch == '\\') /* backslashes */ | |
3917 | tflags |= LEX_PASSNEXT; | |
3918 | ||
3919 | if MBTEST(shellquote (ch)) | |
3920 | { | |
3921 | /* '', ``, or "" inside $(...). */ | |
3922 | push_delimiter (dstack, ch); | |
3923 | if MBTEST((tflags & LEX_WASDOL) && ch == '\'') /* $'...' inside group */ | |
3924 | nestret = parse_matched_pair (ch, ch, ch, &nestlen, P_ALLOWESC|rflags); | |
3925 | else | |
3926 | nestret = parse_matched_pair (ch, ch, ch, &nestlen, rflags); | |
3927 | pop_delimiter (dstack); | |
3928 | CHECK_NESTRET_ERROR (); | |
3929 | ||
3930 | if MBTEST((tflags & LEX_WASDOL) && ch == '\'' && (extended_quote || (rflags & P_DQUOTE) == 0)) | |
3931 | { | |
3932 | /* Translate $'...' here. */ | |
3933 | ttrans = ansiexpand (nestret, 0, nestlen - 1, &ttranslen); | |
3934 | xfree (nestret); | |
3935 | ||
3936 | if ((rflags & P_DQUOTE) == 0) | |
3937 | { | |
3938 | nestret = sh_single_quote (ttrans); | |
3939 | free (ttrans); | |
3940 | nestlen = strlen (nestret); | |
3941 | } | |
3942 | else | |
3943 | { | |
3944 | nestret = ttrans; | |
3945 | nestlen = ttranslen; | |
3946 | } | |
3947 | retind -= 2; /* back up before the $' */ | |
3948 | } | |
3949 | else if MBTEST((tflags & LEX_WASDOL) && ch == '"' && (extended_quote || (rflags & P_DQUOTE) == 0)) | |
3950 | { | |
3951 | /* Locale expand $"..." here. */ | |
3952 | ttrans = localeexpand (nestret, 0, nestlen - 1, start_lineno, &ttranslen); | |
3953 | xfree (nestret); | |
3954 | ||
3955 | nestret = sh_mkdoublequoted (ttrans, ttranslen, 0); | |
3956 | free (ttrans); | |
3957 | nestlen = ttranslen + 2; | |
3958 | retind -= 2; /* back up before the $" */ | |
3959 | } | |
3960 | ||
3961 | APPEND_NESTRET (); | |
3962 | FREE (nestret); | |
3963 | } | |
3964 | else if MBTEST((tflags & LEX_WASDOL) && (ch == '(' || ch == '{' || ch == '[')) /* ) } ] */ | |
3965 | /* check for $(), $[], or ${} inside command substitution. */ | |
ccc6cda3 | 3966 | { |
3185942a | 3967 | if ((tflags & LEX_INCASE) == 0 && open == ch) /* undo previous increment */ |
ccc6cda3 JA |
3968 | count--; |
3969 | if (ch == '(') /* ) */ | |
3185942a | 3970 | nestret = parse_comsub (0, '(', ')', &nestlen, (rflags|P_COMMAND) & ~P_DQUOTE); |
ccc6cda3 | 3971 | else if (ch == '{') /* } */ |
495aee44 | 3972 | nestret = parse_matched_pair (0, '{', '}', &nestlen, P_FIRSTCLOSE|P_DOLBRACE|rflags); |
ccc6cda3 | 3973 | else if (ch == '[') /* ] */ |
b80f6443 | 3974 | nestret = parse_matched_pair (0, '[', ']', &nestlen, rflags); |
95732b49 | 3975 | |
3185942a JA |
3976 | CHECK_NESTRET_ERROR (); |
3977 | APPEND_NESTRET (); | |
3978 | ||
3979 | FREE (nestret); | |
ccc6cda3 | 3980 | } |
3185942a JA |
3981 | if MBTEST(ch == '$') |
3982 | tflags |= LEX_WASDOL; | |
3983 | else | |
3984 | tflags &= ~LEX_WASDOL; | |
ccc6cda3 | 3985 | } |
726f6388 | 3986 | |
3185942a | 3987 | FREE (heredelim); |
ccc6cda3 JA |
3988 | ret[retind] = '\0'; |
3989 | if (lenp) | |
3990 | *lenp = retind; | |
3185942a JA |
3991 | /*itrace("parse_comsub:%d: returning `%s'", line_number, ret);*/ |
3992 | return ret; | |
3993 | } | |
3994 | ||
495aee44 | 3995 | /* Recursively call the parser to parse a $(...) command substitution. */ |
3185942a JA |
3996 | char * |
3997 | xparse_dolparen (base, string, indp, flags) | |
3998 | char *base; | |
3999 | char *string; | |
4000 | int *indp; | |
4001 | int flags; | |
4002 | { | |
4003 | sh_parser_state_t ps; | |
b4839c27 | 4004 | sh_input_line_state_t ls; |
ac50fbac | 4005 | int orig_ind, nc, sflags, orig_eof_token; |
3185942a JA |
4006 | char *ret, *s, *ep, *ostring; |
4007 | ||
4008 | /*yydebug = 1;*/ | |
4009 | orig_ind = *indp; | |
4010 | ostring = string; | |
4011 | ||
b4839c27 | 4012 | /*itrace("xparse_dolparen: size = %d shell_input_line = `%s'", shell_input_line_size, shell_input_line);*/ |
3185942a JA |
4013 | sflags = SEVAL_NONINT|SEVAL_NOHIST|SEVAL_NOFREE; |
4014 | if (flags & SX_NOLONGJMP) | |
4015 | sflags |= SEVAL_NOLONGJMP; | |
4016 | save_parser_state (&ps); | |
b4839c27 | 4017 | save_input_line_state (&ls); |
ac50fbac | 4018 | orig_eof_token = shell_eof_token; |
3185942a JA |
4019 | |
4020 | /*(*/ | |
4021 | parser_state |= PST_CMDSUBST|PST_EOFTOKEN; /* allow instant ')' */ /*(*/ | |
4022 | shell_eof_token = ')'; | |
4023 | parse_string (string, "command substitution", sflags, &ep); | |
4024 | ||
ac50fbac | 4025 | shell_eof_token = orig_eof_token; |
3185942a JA |
4026 | restore_parser_state (&ps); |
4027 | reset_parser (); | |
b4839c27 CR |
4028 | /* reset_parser clears shell_input_line and associated variables */ |
4029 | restore_input_line_state (&ls); | |
3185942a JA |
4030 | if (interactive) |
4031 | token_to_read = 0; | |
4032 | ||
4033 | /* Need to find how many characters parse_and_execute consumed, update | |
4034 | *indp, if flags != 0, copy the portion of the string parsed into RET | |
4035 | and return it. If flags & 1 (EX_NOALLOC) we can return NULL. */ | |
4036 | ||
4037 | /*(*/ | |
4038 | if (ep[-1] != ')') | |
4039 | { | |
4040 | #if DEBUG | |
4041 | if (ep[-1] != '\n') | |
4042 | itrace("xparse_dolparen:%d: ep[-1] != RPAREN (%d), ep = `%s'", line_number, ep[-1], ep); | |
4043 | #endif | |
4044 | while (ep > ostring && ep[-1] == '\n') ep--; | |
4045 | } | |
4046 | ||
4047 | nc = ep - ostring; | |
4048 | *indp = ep - base - 1; | |
4049 | ||
4050 | /*(*/ | |
4051 | #if DEBUG | |
4052 | if (base[*indp] != ')') | |
4053 | itrace("xparse_dolparen:%d: base[%d] != RPAREN (%d), base = `%s'", line_number, *indp, base[*indp], base); | |
4054 | #endif | |
4055 | ||
4056 | if (flags & SX_NOALLOC) | |
4057 | return (char *)NULL; | |
4058 | ||
4059 | if (nc == 0) | |
4060 | { | |
4061 | ret = xmalloc (1); | |
4062 | ret[0] = '\0'; | |
4063 | } | |
4064 | else | |
4065 | ret = substring (ostring, 0, nc - 1); | |
4066 | ||
ccc6cda3 JA |
4067 | return ret; |
4068 | } | |
726f6388 | 4069 | |
bb70624e | 4070 | #if defined (DPAREN_ARITHMETIC) || defined (ARITH_FOR_COMMAND) |
7117c2d2 JA |
4071 | /* Parse a double-paren construct. It can be either an arithmetic |
4072 | command, an arithmetic `for' command, or a nested subshell. Returns | |
4073 | the parsed token, -1 on error, or -2 if we didn't do anything and | |
4074 | should just go on. */ | |
4075 | static int | |
4076 | parse_dparen (c) | |
4077 | int c; | |
4078 | { | |
0628567a JA |
4079 | int cmdtyp, sline; |
4080 | char *wval; | |
7117c2d2 JA |
4081 | WORD_DESC *wd; |
4082 | ||
4083 | #if defined (ARITH_FOR_COMMAND) | |
4084 | if (last_read_token == FOR) | |
4085 | { | |
4086 | arith_for_lineno = line_number; | |
b80f6443 | 4087 | cmdtyp = parse_arith_cmd (&wval, 0); |
7117c2d2 JA |
4088 | if (cmdtyp == 1) |
4089 | { | |
95732b49 JA |
4090 | wd = alloc_word_desc (); |
4091 | wd->word = wval; | |
7117c2d2 | 4092 | yylval.word_list = make_word_list (wd, (WORD_LIST *)NULL); |
7117c2d2 JA |
4093 | return (ARITH_FOR_EXPRS); |
4094 | } | |
4095 | else | |
4096 | return -1; /* ERROR */ | |
4097 | } | |
4098 | #endif | |
4099 | ||
4100 | #if defined (DPAREN_ARITHMETIC) | |
4101 | if (reserved_word_acceptable (last_read_token)) | |
4102 | { | |
4103 | sline = line_number; | |
95732b49 | 4104 | |
b80f6443 | 4105 | cmdtyp = parse_arith_cmd (&wval, 0); |
7117c2d2 JA |
4106 | if (cmdtyp == 1) /* arithmetic command */ |
4107 | { | |
95732b49 JA |
4108 | wd = alloc_word_desc (); |
4109 | wd->word = wval; | |
4110 | wd->flags = W_QUOTED|W_NOSPLIT|W_NOGLOB|W_DQUOTE; | |
7117c2d2 | 4111 | yylval.word_list = make_word_list (wd, (WORD_LIST *)NULL); |
7117c2d2 JA |
4112 | return (ARITH_CMD); |
4113 | } | |
4114 | else if (cmdtyp == 0) /* nested subshell */ | |
4115 | { | |
4116 | push_string (wval, 0, (alias_t *)NULL); | |
ac50fbac | 4117 | pushed_string_list->flags = PSH_DPAREN; |
7117c2d2 JA |
4118 | if ((parser_state & PST_CASEPAT) == 0) |
4119 | parser_state |= PST_SUBSHELL; | |
4120 | return (c); | |
4121 | } | |
4122 | else /* ERROR */ | |
4123 | return -1; | |
4124 | } | |
4125 | #endif | |
4126 | ||
4127 | return -2; /* XXX */ | |
4128 | } | |
4129 | ||
d166f048 JA |
4130 | /* We've seen a `(('. Look for the matching `))'. If we get it, return 1. |
4131 | If not, assume it's a nested subshell for backwards compatibility and | |
4132 | return 0. In any case, put the characters we've consumed into a locally- | |
4133 | allocated buffer and make *ep point to that buffer. Return -1 on an | |
4134 | error, for example EOF. */ | |
4135 | static int | |
b80f6443 | 4136 | parse_arith_cmd (ep, adddq) |
d166f048 | 4137 | char **ep; |
b80f6443 | 4138 | int adddq; |
d166f048 JA |
4139 | { |
4140 | int exp_lineno, rval, c; | |
f73dda09 | 4141 | char *ttok, *tokstr; |
d166f048 JA |
4142 | int ttoklen; |
4143 | ||
4144 | exp_lineno = line_number; | |
4145 | ttok = parse_matched_pair (0, '(', ')', &ttoklen, 0); | |
4146 | rval = 1; | |
4147 | if (ttok == &matched_pair_error) | |
4148 | return -1; | |
4149 | /* Check that the next character is the closing right paren. If | |
4150 | not, this is a syntax error. ( */ | |
7117c2d2 JA |
4151 | c = shell_getc (0); |
4152 | if MBTEST(c != ')') | |
d166f048 JA |
4153 | rval = 0; |
4154 | ||
f73dda09 | 4155 | tokstr = (char *)xmalloc (ttoklen + 4); |
d166f048 | 4156 | |
b80f6443 JA |
4157 | /* if ADDDQ != 0 then (( ... )) -> "..." */ |
4158 | if (rval == 1 && adddq) /* arith cmd, add double quotes */ | |
d166f048 | 4159 | { |
b80f6443 JA |
4160 | tokstr[0] = '"'; |
4161 | strncpy (tokstr + 1, ttok, ttoklen - 1); | |
f73dda09 JA |
4162 | tokstr[ttoklen] = '"'; |
4163 | tokstr[ttoklen+1] = '\0'; | |
d166f048 | 4164 | } |
b80f6443 | 4165 | else if (rval == 1) /* arith cmd, don't add double quotes */ |
d166f048 | 4166 | { |
b80f6443 JA |
4167 | strncpy (tokstr, ttok, ttoklen - 1); |
4168 | tokstr[ttoklen-1] = '\0'; | |
4169 | } | |
4170 | else /* nested subshell */ | |
4171 | { | |
4172 | tokstr[0] = '('; | |
4173 | strncpy (tokstr + 1, ttok, ttoklen - 1); | |
f73dda09 JA |
4174 | tokstr[ttoklen] = ')'; |
4175 | tokstr[ttoklen+1] = c; | |
4176 | tokstr[ttoklen+2] = '\0'; | |
d166f048 | 4177 | } |
b80f6443 | 4178 | |
f73dda09 | 4179 | *ep = tokstr; |
d166f048 JA |
4180 | FREE (ttok); |
4181 | return rval; | |
4182 | } | |
bb70624e | 4183 | #endif /* DPAREN_ARITHMETIC || ARITH_FOR_COMMAND */ |
d166f048 | 4184 | |
cce855bc | 4185 | #if defined (COND_COMMAND) |
7117c2d2 JA |
4186 | static void |
4187 | cond_error () | |
4188 | { | |
4189 | char *etext; | |
4190 | ||
4191 | if (EOF_Reached && cond_token != COND_ERROR) /* [[ */ | |
b80f6443 | 4192 | parser_error (cond_lineno, _("unexpected EOF while looking for `]]'")); |
7117c2d2 JA |
4193 | else if (cond_token != COND_ERROR) |
4194 | { | |
4195 | if (etext = error_token_from_token (cond_token)) | |
4196 | { | |
b80f6443 | 4197 | parser_error (cond_lineno, _("syntax error in conditional expression: unexpected token `%s'"), etext); |
7117c2d2 JA |
4198 | free (etext); |
4199 | } | |
4200 | else | |
b80f6443 | 4201 | parser_error (cond_lineno, _("syntax error in conditional expression")); |
7117c2d2 JA |
4202 | } |
4203 | } | |
4204 | ||
cce855bc JA |
4205 | static COND_COM * |
4206 | cond_expr () | |
4207 | { | |
4208 | return (cond_or ()); | |
4209 | } | |
4210 | ||
4211 | static COND_COM * | |
4212 | cond_or () | |
4213 | { | |
4214 | COND_COM *l, *r; | |
4215 | ||
4216 | l = cond_and (); | |
4217 | if (cond_token == OR_OR) | |
4218 | { | |
4219 | r = cond_or (); | |
4220 | l = make_cond_node (COND_OR, (WORD_DESC *)NULL, l, r); | |
4221 | } | |
4222 | return l; | |
4223 | } | |
4224 | ||
4225 | static COND_COM * | |
4226 | cond_and () | |
4227 | { | |
4228 | COND_COM *l, *r; | |
4229 | ||
4230 | l = cond_term (); | |
4231 | if (cond_token == AND_AND) | |
4232 | { | |
4233 | r = cond_and (); | |
4234 | l = make_cond_node (COND_AND, (WORD_DESC *)NULL, l, r); | |
4235 | } | |
4236 | return l; | |
4237 | } | |
4238 | ||
4239 | static int | |
4240 | cond_skip_newlines () | |
4241 | { | |
4242 | while ((cond_token = read_token (READ)) == '\n') | |
4243 | { | |
b80f6443 | 4244 | if (SHOULD_PROMPT ()) |
cce855bc JA |
4245 | prompt_again (); |
4246 | } | |
4247 | return (cond_token); | |
4248 | } | |
4249 | ||
4250 | #define COND_RETURN_ERROR() \ | |
4251 | do { cond_token = COND_ERROR; return ((COND_COM *)NULL); } while (0) | |
4252 | ||
4253 | static COND_COM * | |
4254 | cond_term () | |
4255 | { | |
4256 | WORD_DESC *op; | |
4257 | COND_COM *term, *tleft, *tright; | |
4258 | int tok, lineno; | |
7117c2d2 | 4259 | char *etext; |
cce855bc JA |
4260 | |
4261 | /* Read a token. It can be a left paren, a `!', a unary operator, or a | |
4262 | word that should be the first argument of a binary operator. Start by | |
4263 | skipping newlines, since this is a compound command. */ | |
4264 | tok = cond_skip_newlines (); | |
4265 | lineno = line_number; | |
4266 | if (tok == COND_END) | |
4267 | { | |
4268 | COND_RETURN_ERROR (); | |
4269 | } | |
4270 | else if (tok == '(') | |
4271 | { | |
4272 | term = cond_expr (); | |
4273 | if (cond_token != ')') | |
4274 | { | |
4275 | if (term) | |
4276 | dispose_cond_node (term); /* ( */ | |
7117c2d2 JA |
4277 | if (etext = error_token_from_token (cond_token)) |
4278 | { | |
b80f6443 | 4279 | parser_error (lineno, _("unexpected token `%s', expected `)'"), etext); |
7117c2d2 JA |
4280 | free (etext); |
4281 | } | |
4282 | else | |
b80f6443 | 4283 | parser_error (lineno, _("expected `)'")); |
cce855bc JA |
4284 | COND_RETURN_ERROR (); |
4285 | } | |
4286 | term = make_cond_node (COND_EXPR, (WORD_DESC *)NULL, term, (COND_COM *)NULL); | |
4287 | (void)cond_skip_newlines (); | |
4288 | } | |
4289 | else if (tok == BANG || (tok == WORD && (yylval.word->word[0] == '!' && yylval.word->word[1] == '\0'))) | |
4290 | { | |
4291 | if (tok == WORD) | |
4292 | dispose_word (yylval.word); /* not needed */ | |
4293 | term = cond_term (); | |
4294 | if (term) | |
4295 | term->flags |= CMD_INVERT_RETURN; | |
4296 | } | |
3185942a | 4297 | else if (tok == WORD && yylval.word->word[0] == '-' && yylval.word->word[2] == 0 && test_unop (yylval.word->word)) |
cce855bc JA |
4298 | { |
4299 | op = yylval.word; | |
4300 | tok = read_token (READ); | |
4301 | if (tok == WORD) | |
4302 | { | |
4303 | tleft = make_cond_node (COND_TERM, yylval.word, (COND_COM *)NULL, (COND_COM *)NULL); | |
4304 | term = make_cond_node (COND_UNARY, op, tleft, (COND_COM *)NULL); | |
4305 | } | |
4306 | else | |
4307 | { | |
4308 | dispose_word (op); | |
7117c2d2 JA |
4309 | if (etext = error_token_from_token (tok)) |
4310 | { | |
b80f6443 | 4311 | parser_error (line_number, _("unexpected argument `%s' to conditional unary operator"), etext); |
7117c2d2 JA |
4312 | free (etext); |
4313 | } | |
4314 | else | |
b80f6443 | 4315 | parser_error (line_number, _("unexpected argument to conditional unary operator")); |
cce855bc JA |
4316 | COND_RETURN_ERROR (); |
4317 | } | |
4318 | ||
4319 | (void)cond_skip_newlines (); | |
4320 | } | |
bb70624e | 4321 | else if (tok == WORD) /* left argument to binary operator */ |
cce855bc JA |
4322 | { |
4323 | /* lhs */ | |
4324 | tleft = make_cond_node (COND_TERM, yylval.word, (COND_COM *)NULL, (COND_COM *)NULL); | |
4325 | ||
4326 | /* binop */ | |
4327 | tok = read_token (READ); | |
4328 | if (tok == WORD && test_binop (yylval.word->word)) | |
0001803f CR |
4329 | { |
4330 | op = yylval.word; | |
4331 | if (op->word[0] == '=' && (op->word[1] == '\0' || (op->word[1] == '=' && op->word[2] == '\0'))) | |
4332 | parser_state |= PST_EXTPAT; | |
4333 | else if (op->word[0] == '!' && op->word[1] == '=' && op->word[2] == '\0') | |
4334 | parser_state |= PST_EXTPAT; | |
4335 | } | |
b80f6443 | 4336 | #if defined (COND_REGEXP) |
f1be666c JA |
4337 | else if (tok == WORD && STREQ (yylval.word->word, "=~")) |
4338 | { | |
4339 | op = yylval.word; | |
4340 | parser_state |= PST_REGEXP; | |
4341 | } | |
b80f6443 | 4342 | #endif |
cce855bc | 4343 | else if (tok == '<' || tok == '>') |
28ef6c31 JA |
4344 | op = make_word_from_token (tok); /* ( */ |
4345 | /* There should be a check before blindly accepting the `)' that we have | |
4346 | seen the opening `('. */ | |
4347 | else if (tok == COND_END || tok == AND_AND || tok == OR_OR || tok == ')') | |
cce855bc JA |
4348 | { |
4349 | /* Special case. [[ x ]] is equivalent to [[ -n x ]], just like | |
4350 | the test command. Similarly for [[ x && expr ]] or | |
28ef6c31 | 4351 | [[ x || expr ]] or [[ (x) ]]. */ |
cce855bc JA |
4352 | op = make_word ("-n"); |
4353 | term = make_cond_node (COND_UNARY, op, tleft, (COND_COM *)NULL); | |
4354 | cond_token = tok; | |
4355 | return (term); | |
4356 | } | |
4357 | else | |
4358 | { | |
7117c2d2 JA |
4359 | if (etext = error_token_from_token (tok)) |
4360 | { | |
b80f6443 | 4361 | parser_error (line_number, _("unexpected token `%s', conditional binary operator expected"), etext); |
7117c2d2 JA |
4362 | free (etext); |
4363 | } | |
4364 | else | |
b80f6443 | 4365 | parser_error (line_number, _("conditional binary operator expected")); |
cce855bc JA |
4366 | dispose_cond_node (tleft); |
4367 | COND_RETURN_ERROR (); | |
4368 | } | |
4369 | ||
4370 | /* rhs */ | |
0001803f CR |
4371 | if (parser_state & PST_EXTPAT) |
4372 | extended_glob = 1; | |
cce855bc | 4373 | tok = read_token (READ); |
0001803f CR |
4374 | if (parser_state & PST_EXTPAT) |
4375 | extended_glob = global_extglob; | |
4376 | parser_state &= ~(PST_REGEXP|PST_EXTPAT); | |
4377 | ||
cce855bc JA |
4378 | if (tok == WORD) |
4379 | { | |
4380 | tright = make_cond_node (COND_TERM, yylval.word, (COND_COM *)NULL, (COND_COM *)NULL); | |
4381 | term = make_cond_node (COND_BINARY, op, tleft, tright); | |
4382 | } | |
4383 | else | |
4384 | { | |
7117c2d2 JA |
4385 | if (etext = error_token_from_token (tok)) |
4386 | { | |
b80f6443 | 4387 | parser_error (line_number, _("unexpected argument `%s' to conditional binary operator"), etext); |
7117c2d2 JA |
4388 | free (etext); |
4389 | } | |
4390 | else | |
b80f6443 | 4391 | parser_error (line_number, _("unexpected argument to conditional binary operator")); |
cce855bc JA |
4392 | dispose_cond_node (tleft); |
4393 | dispose_word (op); | |
4394 | COND_RETURN_ERROR (); | |
4395 | } | |
4396 | ||
4397 | (void)cond_skip_newlines (); | |
4398 | } | |
bb70624e JA |
4399 | else |
4400 | { | |
4401 | if (tok < 256) | |
b80f6443 | 4402 | parser_error (line_number, _("unexpected token `%c' in conditional command"), tok); |
7117c2d2 JA |
4403 | else if (etext = error_token_from_token (tok)) |
4404 | { | |
b80f6443 | 4405 | parser_error (line_number, _("unexpected token `%s' in conditional command"), etext); |
7117c2d2 JA |
4406 | free (etext); |
4407 | } | |
bb70624e | 4408 | else |
b80f6443 | 4409 | parser_error (line_number, _("unexpected token %d in conditional command"), tok); |
bb70624e JA |
4410 | COND_RETURN_ERROR (); |
4411 | } | |
cce855bc JA |
4412 | return (term); |
4413 | } | |
4414 | ||
4415 | /* This is kind of bogus -- we slip a mini recursive-descent parser in | |
4416 | here to handle the conditional statement syntax. */ | |
4417 | static COMMAND * | |
4418 | parse_cond_command () | |
4419 | { | |
4420 | COND_COM *cexp; | |
4421 | ||
0001803f | 4422 | global_extglob = extended_glob; |
cce855bc JA |
4423 | cexp = cond_expr (); |
4424 | return (make_cond_command (cexp)); | |
4425 | } | |
4426 | #endif | |
4427 | ||
7117c2d2 JA |
4428 | #if defined (ARRAY_VARS) |
4429 | /* When this is called, it's guaranteed that we don't care about anything | |
4430 | in t beyond i. We do save and restore the chars, though. */ | |
4431 | static int | |
4432 | token_is_assignment (t, i) | |
4433 | char *t; | |
4434 | int i; | |
4435 | { | |
4436 | unsigned char c, c1; | |
4437 | int r; | |
4438 | ||
4439 | c = t[i]; c1 = t[i+1]; | |
4440 | t[i] = '='; t[i+1] = '\0'; | |
b80f6443 | 4441 | r = assignment (t, (parser_state & PST_COMPASSIGN) != 0); |
7117c2d2 JA |
4442 | t[i] = c; t[i+1] = c1; |
4443 | return r; | |
4444 | } | |
4445 | ||
95732b49 | 4446 | /* XXX - possible changes here for `+=' */ |
7117c2d2 JA |
4447 | static int |
4448 | token_is_ident (t, i) | |
4449 | char *t; | |
4450 | int i; | |
4451 | { | |
4452 | unsigned char c; | |
4453 | int r; | |
4454 | ||
4455 | c = t[i]; | |
4456 | t[i] = '\0'; | |
4457 | r = legal_identifier (t); | |
4458 | t[i] = c; | |
4459 | return r; | |
4460 | } | |
4461 | #endif | |
4462 | ||
ccc6cda3 JA |
4463 | static int |
4464 | read_token_word (character) | |
4465 | int character; | |
4466 | { | |
4467 | /* The value for YYLVAL when a WORD is read. */ | |
4468 | WORD_DESC *the_word; | |
726f6388 | 4469 | |
ccc6cda3 JA |
4470 | /* Index into the token that we are building. */ |
4471 | int token_index; | |
726f6388 | 4472 | |
ccc6cda3 | 4473 | /* ALL_DIGITS becomes zero when we see a non-digit. */ |
f73dda09 | 4474 | int all_digit_token; |
726f6388 | 4475 | |
ccc6cda3 JA |
4476 | /* DOLLAR_PRESENT becomes non-zero if we see a `$'. */ |
4477 | int dollar_present; | |
726f6388 | 4478 | |
95732b49 JA |
4479 | /* COMPOUND_ASSIGNMENT becomes non-zero if we are parsing a compound |
4480 | assignment. */ | |
4481 | int compound_assignment; | |
4482 | ||
ccc6cda3 JA |
4483 | /* QUOTED becomes non-zero if we see one of ("), ('), (`), or (\). */ |
4484 | int quoted; | |
726f6388 | 4485 | |
ccc6cda3 JA |
4486 | /* Non-zero means to ignore the value of the next character, and just |
4487 | to add it no matter what. */ | |
4488 | int pass_next_character; | |
726f6388 | 4489 | |
ccc6cda3 JA |
4490 | /* The current delimiting character. */ |
4491 | int cd; | |
4492 | int result, peek_char; | |
4493 | char *ttok, *ttrans; | |
4494 | int ttoklen, ttranslen; | |
7117c2d2 | 4495 | intmax_t lvalue; |
726f6388 | 4496 | |
d166f048 | 4497 | if (token_buffer_size < TOKEN_DEFAULT_INITIAL_SIZE) |
f73dda09 | 4498 | token = (char *)xrealloc (token, token_buffer_size = TOKEN_DEFAULT_INITIAL_SIZE); |
726f6388 | 4499 | |
ccc6cda3 | 4500 | token_index = 0; |
f73dda09 | 4501 | all_digit_token = DIGIT (character); |
95732b49 | 4502 | dollar_present = quoted = pass_next_character = compound_assignment = 0; |
726f6388 | 4503 | |
ccc6cda3 JA |
4504 | for (;;) |
4505 | { | |
4506 | if (character == EOF) | |
4507 | goto got_token; | |
726f6388 | 4508 | |
ccc6cda3 JA |
4509 | if (pass_next_character) |
4510 | { | |
4511 | pass_next_character = 0; | |
f1be666c | 4512 | goto got_escaped_character; |
ccc6cda3 | 4513 | } |
726f6388 | 4514 | |
ccc6cda3 | 4515 | cd = current_delimiter (dstack); |
726f6388 | 4516 | |
ccc6cda3 JA |
4517 | /* Handle backslashes. Quote lots of things when not inside of |
4518 | double-quotes, quote some things inside of double-quotes. */ | |
7117c2d2 | 4519 | if MBTEST(character == '\\') |
ccc6cda3 JA |
4520 | { |
4521 | peek_char = shell_getc (0); | |
726f6388 | 4522 | |
ccc6cda3 JA |
4523 | /* Backslash-newline is ignored in all cases except |
4524 | when quoted with single quotes. */ | |
4525 | if (peek_char == '\n') | |
4526 | { | |
4527 | character = '\n'; | |
4528 | goto next_character; | |
4529 | } | |
4530 | else | |
4531 | { | |
4532 | shell_ungetc (peek_char); | |
726f6388 | 4533 | |
ccc6cda3 JA |
4534 | /* If the next character is to be quoted, note it now. */ |
4535 | if (cd == 0 || cd == '`' || | |
f73dda09 | 4536 | (cd == '"' && peek_char >= 0 && (sh_syntaxtab[peek_char] & CBSDQUOTE))) |
ccc6cda3 | 4537 | pass_next_character++; |
726f6388 | 4538 | |
ccc6cda3 JA |
4539 | quoted = 1; |
4540 | goto got_character; | |
4541 | } | |
4542 | } | |
726f6388 | 4543 | |
ccc6cda3 | 4544 | /* Parse a matched pair of quote characters. */ |
7117c2d2 | 4545 | if MBTEST(shellquote (character)) |
ccc6cda3 JA |
4546 | { |
4547 | push_delimiter (dstack, character); | |
95732b49 | 4548 | ttok = parse_matched_pair (character, character, character, &ttoklen, (character == '`') ? P_COMMAND : 0); |
ccc6cda3 JA |
4549 | pop_delimiter (dstack); |
4550 | if (ttok == &matched_pair_error) | |
4551 | return -1; /* Bail immediately. */ | |
4552 | RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 2, | |
4553 | token_buffer_size, TOKEN_DEFAULT_GROW_SIZE); | |
4554 | token[token_index++] = character; | |
4555 | strcpy (token + token_index, ttok); | |
4556 | token_index += ttoklen; | |
f73dda09 | 4557 | all_digit_token = 0; |
ccc6cda3 JA |
4558 | quoted = 1; |
4559 | dollar_present |= (character == '"' && strchr (ttok, '$') != 0); | |
4560 | FREE (ttok); | |
4561 | goto next_character; | |
4562 | } | |
726f6388 | 4563 | |
f1be666c JA |
4564 | #ifdef COND_REGEXP |
4565 | /* When parsing a regexp as a single word inside a conditional command, | |
4566 | we need to special-case characters special to both the shell and | |
4567 | regular expressions. Right now, that is only '(' and '|'. */ /*)*/ | |
4568 | if MBTEST((parser_state & PST_REGEXP) && (character == '(' || character == '|')) /*)*/ | |
3185942a JA |
4569 | { |
4570 | if (character == '|') | |
4571 | goto got_character; | |
f1be666c JA |
4572 | |
4573 | push_delimiter (dstack, character); | |
4574 | ttok = parse_matched_pair (cd, '(', ')', &ttoklen, 0); | |
4575 | pop_delimiter (dstack); | |
4576 | if (ttok == &matched_pair_error) | |
4577 | return -1; /* Bail immediately. */ | |
4578 | RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 2, | |
4579 | token_buffer_size, TOKEN_DEFAULT_GROW_SIZE); | |
4580 | token[token_index++] = character; | |
4581 | strcpy (token + token_index, ttok); | |
4582 | token_index += ttoklen; | |
4583 | FREE (ttok); | |
4584 | dollar_present = all_digit_token = 0; | |
4585 | goto next_character; | |
3185942a | 4586 | } |
f1be666c JA |
4587 | #endif /* COND_REGEXP */ |
4588 | ||
cce855bc JA |
4589 | #ifdef EXTENDED_GLOB |
4590 | /* Parse a ksh-style extended pattern matching specification. */ | |
f1be666c | 4591 | if MBTEST(extended_glob && PATTERN_CHAR (character)) |
cce855bc JA |
4592 | { |
4593 | peek_char = shell_getc (1); | |
7117c2d2 | 4594 | if MBTEST(peek_char == '(') /* ) */ |
cce855bc JA |
4595 | { |
4596 | push_delimiter (dstack, peek_char); | |
4597 | ttok = parse_matched_pair (cd, '(', ')', &ttoklen, 0); | |
4598 | pop_delimiter (dstack); | |
4599 | if (ttok == &matched_pair_error) | |
4600 | return -1; /* Bail immediately. */ | |
ac50fbac | 4601 | RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 3, |
cce855bc JA |
4602 | token_buffer_size, |
4603 | TOKEN_DEFAULT_GROW_SIZE); | |
4604 | token[token_index++] = character; | |
4605 | token[token_index++] = peek_char; | |
4606 | strcpy (token + token_index, ttok); | |
4607 | token_index += ttoklen; | |
4608 | FREE (ttok); | |
f73dda09 | 4609 | dollar_present = all_digit_token = 0; |
cce855bc JA |
4610 | goto next_character; |
4611 | } | |
4612 | else | |
4613 | shell_ungetc (peek_char); | |
4614 | } | |
4615 | #endif /* EXTENDED_GLOB */ | |
4616 | ||
ccc6cda3 JA |
4617 | /* If the delimiter character is not single quote, parse some of |
4618 | the shell expansions that must be read as a single word. */ | |
28ef6c31 | 4619 | if (shellexp (character)) |
ccc6cda3 JA |
4620 | { |
4621 | peek_char = shell_getc (1); | |
4622 | /* $(...), <(...), >(...), $((...)), ${...}, and $[...] constructs */ | |
ac50fbac | 4623 | if MBTEST(peek_char == '(' || |
ccc6cda3 JA |
4624 | ((peek_char == '{' || peek_char == '[') && character == '$')) /* ) ] } */ |
4625 | { | |
4626 | if (peek_char == '{') /* } */ | |
495aee44 | 4627 | ttok = parse_matched_pair (cd, '{', '}', &ttoklen, P_FIRSTCLOSE|P_DOLBRACE); |
ccc6cda3 | 4628 | else if (peek_char == '(') /* ) */ |
d166f048 JA |
4629 | { |
4630 | /* XXX - push and pop the `(' as a delimiter for use by | |
4631 | the command-oriented-history code. This way newlines | |
4632 | appearing in the $(...) string get added to the | |
4633 | history literally rather than causing a possibly- | |
bb70624e | 4634 | incorrect `;' to be added. ) */ |
d166f048 | 4635 | push_delimiter (dstack, peek_char); |
3185942a | 4636 | ttok = parse_comsub (cd, '(', ')', &ttoklen, P_COMMAND); |
d166f048 JA |
4637 | pop_delimiter (dstack); |
4638 | } | |
ccc6cda3 JA |
4639 | else |
4640 | ttok = parse_matched_pair (cd, '[', ']', &ttoklen, 0); | |
4641 | if (ttok == &matched_pair_error) | |
4642 | return -1; /* Bail immediately. */ | |
ac50fbac | 4643 | RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 3, |
ccc6cda3 JA |
4644 | token_buffer_size, |
4645 | TOKEN_DEFAULT_GROW_SIZE); | |
4646 | token[token_index++] = character; | |
4647 | token[token_index++] = peek_char; | |
4648 | strcpy (token + token_index, ttok); | |
4649 | token_index += ttoklen; | |
4650 | FREE (ttok); | |
4651 | dollar_present = 1; | |
f73dda09 | 4652 | all_digit_token = 0; |
ccc6cda3 JA |
4653 | goto next_character; |
4654 | } | |
4655 | /* This handles $'...' and $"..." new-style quoted strings. */ | |
7117c2d2 | 4656 | else if MBTEST(character == '$' && (peek_char == '\'' || peek_char == '"')) |
ccc6cda3 | 4657 | { |
cce855bc JA |
4658 | int first_line; |
4659 | ||
4660 | first_line = line_number; | |
bb70624e JA |
4661 | push_delimiter (dstack, peek_char); |
4662 | ttok = parse_matched_pair (peek_char, peek_char, peek_char, | |
4663 | &ttoklen, | |
4664 | (peek_char == '\'') ? P_ALLOWESC : 0); | |
4665 | pop_delimiter (dstack); | |
ccc6cda3 JA |
4666 | if (ttok == &matched_pair_error) |
4667 | return -1; | |
4668 | if (peek_char == '\'') | |
bb70624e JA |
4669 | { |
4670 | ttrans = ansiexpand (ttok, 0, ttoklen - 1, &ttranslen); | |
4671 | free (ttok); | |
95732b49 | 4672 | |
bb70624e JA |
4673 | /* Insert the single quotes and correctly quote any |
4674 | embedded single quotes (allowed because P_ALLOWESC was | |
4675 | passed to parse_matched_pair). */ | |
28ef6c31 | 4676 | ttok = sh_single_quote (ttrans); |
bb70624e | 4677 | free (ttrans); |
95732b49 | 4678 | ttranslen = strlen (ttok); |
bb70624e | 4679 | ttrans = ttok; |
bb70624e | 4680 | } |
ccc6cda3 | 4681 | else |
bb70624e | 4682 | { |
0628567a | 4683 | /* Try to locale-expand the converted string. */ |
bb70624e JA |
4684 | ttrans = localeexpand (ttok, 0, ttoklen - 1, first_line, &ttranslen); |
4685 | free (ttok); | |
4686 | ||
4687 | /* Add the double quotes back */ | |
95732b49 | 4688 | ttok = sh_mkdoublequoted (ttrans, ttranslen, 0); |
bb70624e | 4689 | free (ttrans); |
95732b49 | 4690 | ttranslen += 2; |
bb70624e JA |
4691 | ttrans = ttok; |
4692 | } | |
4693 | ||
ac50fbac | 4694 | RESIZE_MALLOCED_BUFFER (token, token_index, ttranslen + 1, |
ccc6cda3 JA |
4695 | token_buffer_size, |
4696 | TOKEN_DEFAULT_GROW_SIZE); | |
ccc6cda3 JA |
4697 | strcpy (token + token_index, ttrans); |
4698 | token_index += ttranslen; | |
ccc6cda3 JA |
4699 | FREE (ttrans); |
4700 | quoted = 1; | |
f73dda09 | 4701 | all_digit_token = 0; |
ccc6cda3 JA |
4702 | goto next_character; |
4703 | } | |
b72432fd JA |
4704 | /* This could eventually be extended to recognize all of the |
4705 | shell's single-character parameter expansions, and set flags.*/ | |
7117c2d2 | 4706 | else if MBTEST(character == '$' && peek_char == '$') |
b72432fd | 4707 | { |
b72432fd JA |
4708 | RESIZE_MALLOCED_BUFFER (token, token_index, 3, |
4709 | token_buffer_size, | |
4710 | TOKEN_DEFAULT_GROW_SIZE); | |
ac50fbac CR |
4711 | token[token_index++] = '$'; |
4712 | token[token_index++] = peek_char; | |
b72432fd | 4713 | dollar_present = 1; |
f73dda09 | 4714 | all_digit_token = 0; |
b72432fd JA |
4715 | goto next_character; |
4716 | } | |
ccc6cda3 JA |
4717 | else |
4718 | shell_ungetc (peek_char); | |
4719 | } | |
726f6388 | 4720 | |
ccc6cda3 | 4721 | #if defined (ARRAY_VARS) |
3185942a JA |
4722 | /* Identify possible array subscript assignment; match [...]. If |
4723 | parser_state&PST_COMPASSIGN, we need to parse [sub]=words treating | |
4724 | `sub' as if it were enclosed in double quotes. */ | |
4725 | else if MBTEST(character == '[' && /* ] */ | |
4726 | ((token_index > 0 && assignment_acceptable (last_read_token) && token_is_ident (token, token_index)) || | |
4727 | (token_index == 0 && (parser_state&PST_COMPASSIGN)))) | |
7117c2d2 | 4728 | { |
89a92869 | 4729 | ttok = parse_matched_pair (cd, '[', ']', &ttoklen, P_ARRAYSUB); |
7117c2d2 JA |
4730 | if (ttok == &matched_pair_error) |
4731 | return -1; /* Bail immediately. */ | |
4732 | RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 2, | |
4733 | token_buffer_size, | |
4734 | TOKEN_DEFAULT_GROW_SIZE); | |
4735 | token[token_index++] = character; | |
4736 | strcpy (token + token_index, ttok); | |
4737 | token_index += ttoklen; | |
4738 | FREE (ttok); | |
4739 | all_digit_token = 0; | |
4740 | goto next_character; | |
4741 | } | |
ccc6cda3 | 4742 | /* Identify possible compound array variable assignment. */ |
95732b49 | 4743 | else if MBTEST(character == '=' && token_index > 0 && (assignment_acceptable (last_read_token) || (parser_state & PST_ASSIGNOK)) && token_is_assignment (token, token_index)) |
ccc6cda3 JA |
4744 | { |
4745 | peek_char = shell_getc (1); | |
7117c2d2 | 4746 | if MBTEST(peek_char == '(') /* ) */ |
ccc6cda3 | 4747 | { |
7117c2d2 JA |
4748 | ttok = parse_compound_assignment (&ttoklen); |
4749 | ||
4750 | RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 4, | |
ccc6cda3 JA |
4751 | token_buffer_size, |
4752 | TOKEN_DEFAULT_GROW_SIZE); | |
7117c2d2 JA |
4753 | |
4754 | token[token_index++] = '='; | |
4755 | token[token_index++] = '('; | |
4756 | if (ttok) | |
4757 | { | |
4758 | strcpy (token + token_index, ttok); | |
4759 | token_index += ttoklen; | |
4760 | } | |
4761 | token[token_index++] = ')'; | |
ccc6cda3 | 4762 | FREE (ttok); |
f73dda09 | 4763 | all_digit_token = 0; |
95732b49 | 4764 | compound_assignment = 1; |
0628567a | 4765 | #if 1 |
ccc6cda3 | 4766 | goto next_character; |
95732b49 JA |
4767 | #else |
4768 | goto got_token; /* ksh93 seems to do this */ | |
4769 | #endif | |
ccc6cda3 JA |
4770 | } |
4771 | else | |
4772 | shell_ungetc (peek_char); | |
4773 | } | |
4774 | #endif | |
726f6388 | 4775 | |
ccc6cda3 JA |
4776 | /* When not parsing a multi-character word construct, shell meta- |
4777 | characters break words. */ | |
7117c2d2 | 4778 | if MBTEST(shellbreak (character)) |
ccc6cda3 JA |
4779 | { |
4780 | shell_ungetc (character); | |
4781 | goto got_token; | |
4782 | } | |
726f6388 | 4783 | |
ac50fbac | 4784 | got_character: |
726f6388 | 4785 | |
ccc6cda3 | 4786 | if (character == CTLESC || character == CTLNUL) |
ac50fbac CR |
4787 | { |
4788 | RESIZE_MALLOCED_BUFFER (token, token_index, 2, token_buffer_size, | |
4789 | TOKEN_DEFAULT_GROW_SIZE); | |
4790 | token[token_index++] = CTLESC; | |
4791 | } | |
4792 | else | |
4793 | got_escaped_character: | |
4794 | RESIZE_MALLOCED_BUFFER (token, token_index, 1, token_buffer_size, | |
4795 | TOKEN_DEFAULT_GROW_SIZE); | |
726f6388 | 4796 | |
ac50fbac | 4797 | token[token_index++] = character; |
f1be666c JA |
4798 | |
4799 | all_digit_token &= DIGIT (character); | |
4800 | dollar_present |= character == '$'; | |
4801 | ||
ccc6cda3 | 4802 | next_character: |
b80f6443 | 4803 | if (character == '\n' && SHOULD_PROMPT ()) |
ccc6cda3 | 4804 | prompt_again (); |
726f6388 | 4805 | |
ccc6cda3 JA |
4806 | /* We want to remove quoted newlines (that is, a \<newline> pair) |
4807 | unless we are within single quotes or pass_next_character is | |
4808 | set (the shell equivalent of literal-next). */ | |
4809 | cd = current_delimiter (dstack); | |
4810 | character = shell_getc (cd != '\'' && pass_next_character == 0); | |
4811 | } /* end for (;;) */ | |
726f6388 | 4812 | |
ccc6cda3 | 4813 | got_token: |
726f6388 | 4814 | |
ac50fbac | 4815 | /* Calls to RESIZE_MALLOCED_BUFFER ensure there is sufficient room. */ |
ccc6cda3 | 4816 | token[token_index] = '\0'; |
726f6388 | 4817 | |
ccc6cda3 JA |
4818 | /* Check to see what thing we should return. If the last_read_token |
4819 | is a `<', or a `&', or the character which ended this token is | |
4820 | a '>' or '<', then, and ONLY then, is this input token a NUMBER. | |
4821 | Otherwise, it is just a word, and should be returned as such. */ | |
ac50fbac CR |
4822 | if MBTEST(all_digit_token && (character == '<' || character == '>' || |
4823 | last_read_token == LESS_AND || | |
ccc6cda3 | 4824 | last_read_token == GREATER_AND)) |
726f6388 | 4825 | { |
f73dda09 | 4826 | if (legal_number (token, &lvalue) && (int)lvalue == lvalue) |
ac50fbac CR |
4827 | { |
4828 | yylval.number = lvalue; | |
4829 | return (NUMBER); | |
4830 | } | |
726f6388 JA |
4831 | } |
4832 | ||
ccc6cda3 | 4833 | /* Check for special case tokens. */ |
7117c2d2 | 4834 | result = (last_shell_getc_is_singlebyte) ? special_case_tokens (token) : -1; |
ccc6cda3 JA |
4835 | if (result >= 0) |
4836 | return result; | |
726f6388 JA |
4837 | |
4838 | #if defined (ALIAS) | |
ccc6cda3 JA |
4839 | /* Posix.2 does not allow reserved words to be aliased, so check for all |
4840 | of them, including special cases, before expanding the current token | |
4841 | as an alias. */ | |
7117c2d2 | 4842 | if MBTEST(posixly_correct) |
ccc6cda3 JA |
4843 | CHECK_FOR_RESERVED_WORD (token); |
4844 | ||
4845 | /* Aliases are expanded iff EXPAND_ALIASES is non-zero, and quoting | |
4846 | inhibits alias expansion. */ | |
4847 | if (expand_aliases && quoted == 0) | |
4848 | { | |
4849 | result = alias_expand_token (token); | |
4850 | if (result == RE_READ_TOKEN) | |
4851 | return (RE_READ_TOKEN); | |
4852 | else if (result == NO_EXPANSION) | |
4853 | parser_state &= ~PST_ALEXPNEXT; | |
4854 | } | |
726f6388 | 4855 | |
ccc6cda3 JA |
4856 | /* If not in Posix.2 mode, check for reserved words after alias |
4857 | expansion. */ | |
7117c2d2 | 4858 | if MBTEST(posixly_correct == 0) |
ccc6cda3 JA |
4859 | #endif |
4860 | CHECK_FOR_RESERVED_WORD (token); | |
4861 | ||
4862 | the_word = (WORD_DESC *)xmalloc (sizeof (WORD_DESC)); | |
f73dda09 | 4863 | the_word->word = (char *)xmalloc (1 + token_index); |
ccc6cda3 JA |
4864 | the_word->flags = 0; |
4865 | strcpy (the_word->word, token); | |
4866 | if (dollar_present) | |
4867 | the_word->flags |= W_HASDOLLAR; | |
4868 | if (quoted) | |
0628567a JA |
4869 | the_word->flags |= W_QUOTED; /*(*/ |
4870 | if (compound_assignment && token[token_index-1] == ')') | |
95732b49 | 4871 | the_word->flags |= W_COMPASSIGN; |
ccc6cda3 JA |
4872 | /* A word is an assignment if it appears at the beginning of a |
4873 | simple command, or after another assignment word. This is | |
4874 | context-dependent, so it cannot be handled in the grammar. */ | |
b80f6443 | 4875 | if (assignment (token, (parser_state & PST_COMPASSIGN) != 0)) |
ccc6cda3 JA |
4876 | { |
4877 | the_word->flags |= W_ASSIGNMENT; | |
4878 | /* Don't perform word splitting on assignment statements. */ | |
b80f6443 | 4879 | if (assignment_acceptable (last_read_token) || (parser_state & PST_COMPASSIGN) != 0) |
ac50fbac CR |
4880 | { |
4881 | the_word->flags |= W_NOSPLIT; | |
4882 | if (parser_state & PST_COMPASSIGN) | |
4883 | the_word->flags |= W_NOGLOB; /* XXX - W_NOBRACE? */ | |
4884 | } | |
ccc6cda3 | 4885 | } |
726f6388 | 4886 | |
95732b49 JA |
4887 | if (command_token_position (last_read_token)) |
4888 | { | |
4889 | struct builtin *b; | |
4890 | b = builtin_address_internal (token, 0); | |
4891 | if (b && (b->flags & ASSIGNMENT_BUILTIN)) | |
0628567a JA |
4892 | parser_state |= PST_ASSIGNOK; |
4893 | else if (STREQ (token, "eval") || STREQ (token, "let")) | |
4894 | parser_state |= PST_ASSIGNOK; | |
95732b49 JA |
4895 | } |
4896 | ||
ccc6cda3 | 4897 | yylval.word = the_word; |
726f6388 | 4898 | |
0001803f CR |
4899 | if (token[0] == '{' && token[token_index-1] == '}' && |
4900 | (character == '<' || character == '>')) | |
4901 | { | |
4902 | /* can use token; already copied to the_word */ | |
4903 | token[token_index-1] = '\0'; | |
ac50fbac CR |
4904 | #if defined (ARRAY_VARS) |
4905 | if (legal_identifier (token+1) || valid_array_reference (token+1)) | |
4906 | #else | |
0001803f | 4907 | if (legal_identifier (token+1)) |
ac50fbac | 4908 | #endif |
0001803f CR |
4909 | { |
4910 | strcpy (the_word->word, token+1); | |
4911 | /*itrace("read_token_word: returning REDIR_WORD for %s", the_word->word);*/ | |
4912 | return (REDIR_WORD); | |
4913 | } | |
4914 | } | |
4915 | ||
ccc6cda3 JA |
4916 | result = ((the_word->flags & (W_ASSIGNMENT|W_NOSPLIT)) == (W_ASSIGNMENT|W_NOSPLIT)) |
4917 | ? ASSIGNMENT_WORD : WORD; | |
726f6388 | 4918 | |
b80f6443 | 4919 | switch (last_read_token) |
ccc6cda3 | 4920 | { |
b80f6443 | 4921 | case FUNCTION: |
ccc6cda3 JA |
4922 | parser_state |= PST_ALLOWOPNBRC; |
4923 | function_dstart = line_number; | |
b80f6443 JA |
4924 | break; |
4925 | case CASE: | |
4926 | case SELECT: | |
4927 | case FOR: | |
4928 | if (word_top < MAX_CASE_NEST) | |
4929 | word_top++; | |
4930 | word_lineno[word_top] = line_number; | |
4931 | break; | |
ccc6cda3 | 4932 | } |
726f6388 | 4933 | |
ccc6cda3 JA |
4934 | return (result); |
4935 | } | |
726f6388 | 4936 | |
f73dda09 | 4937 | /* Return 1 if TOKSYM is a token that after being read would allow |
726f6388 JA |
4938 | a reserved word to be seen, else 0. */ |
4939 | static int | |
f73dda09 JA |
4940 | reserved_word_acceptable (toksym) |
4941 | int toksym; | |
726f6388 | 4942 | { |
7117c2d2 JA |
4943 | switch (toksym) |
4944 | { | |
4945 | case '\n': | |
4946 | case ';': | |
4947 | case '(': | |
4948 | case ')': | |
4949 | case '|': | |
4950 | case '&': | |
4951 | case '{': | |
4952 | case '}': /* XXX */ | |
4953 | case AND_AND: | |
4954 | case BANG: | |
89a92869 | 4955 | case BAR_AND: |
7117c2d2 JA |
4956 | case DO: |
4957 | case DONE: | |
4958 | case ELIF: | |
4959 | case ELSE: | |
4960 | case ESAC: | |
4961 | case FI: | |
4962 | case IF: | |
4963 | case OR_OR: | |
4964 | case SEMI_SEMI: | |
3185942a JA |
4965 | case SEMI_AND: |
4966 | case SEMI_SEMI_AND: | |
7117c2d2 JA |
4967 | case THEN: |
4968 | case TIME: | |
4969 | case TIMEOPT: | |
495aee44 | 4970 | case TIMEIGN: |
3185942a | 4971 | case COPROC: |
7117c2d2 JA |
4972 | case UNTIL: |
4973 | case WHILE: | |
4974 | case 0: | |
4975 | return 1; | |
4976 | default: | |
3185942a JA |
4977 | #if defined (COPROCESS_SUPPORT) |
4978 | if (last_read_token == WORD && token_before_that == COPROC) | |
4979 | return 1; | |
4980 | #endif | |
495aee44 CR |
4981 | if (last_read_token == WORD && token_before_that == FUNCTION) |
4982 | return 1; | |
7117c2d2 JA |
4983 | return 0; |
4984 | } | |
726f6388 | 4985 | } |
7117c2d2 | 4986 | |
726f6388 JA |
4987 | /* Return the index of TOKEN in the alist of reserved words, or -1 if |
4988 | TOKEN is not a shell reserved word. */ | |
4989 | int | |
f73dda09 JA |
4990 | find_reserved_word (tokstr) |
4991 | char *tokstr; | |
726f6388 JA |
4992 | { |
4993 | int i; | |
ccc6cda3 | 4994 | for (i = 0; word_token_alist[i].word; i++) |
f73dda09 | 4995 | if (STREQ (tokstr, word_token_alist[i].word)) |
726f6388 JA |
4996 | return i; |
4997 | return -1; | |
4998 | } | |
4999 | ||
ac50fbac CR |
5000 | /* An interface to let the rest of the shell (primarily the completion |
5001 | system) know what the parser is expecting. */ | |
5002 | int | |
5003 | parser_in_command_position () | |
5004 | { | |
5005 | return (command_token_position (last_read_token)); | |
5006 | } | |
5007 | ||
ccc6cda3 | 5008 | #if 0 |
726f6388 JA |
5009 | #if defined (READLINE) |
5010 | /* Called after each time readline is called. This insures that whatever | |
5011 | the new prompt string is gets propagated to readline's local prompt | |
5012 | variable. */ | |
5013 | static void | |
5014 | reset_readline_prompt () | |
5015 | { | |
ccc6cda3 JA |
5016 | char *temp_prompt; |
5017 | ||
726f6388 JA |
5018 | if (prompt_string_pointer) |
5019 | { | |
ccc6cda3 | 5020 | temp_prompt = (*prompt_string_pointer) |
726f6388 JA |
5021 | ? decode_prompt_string (*prompt_string_pointer) |
5022 | : (char *)NULL; | |
5023 | ||
5024 | if (temp_prompt == 0) | |
5025 | { | |
f73dda09 | 5026 | temp_prompt = (char *)xmalloc (1); |
726f6388 JA |
5027 | temp_prompt[0] = '\0'; |
5028 | } | |
5029 | ||
5030 | FREE (current_readline_prompt); | |
726f6388 JA |
5031 | current_readline_prompt = temp_prompt; |
5032 | } | |
5033 | } | |
5034 | #endif /* READLINE */ | |
ccc6cda3 | 5035 | #endif /* 0 */ |
726f6388 JA |
5036 | |
5037 | #if defined (HISTORY) | |
5038 | /* A list of tokens which can be followed by newlines, but not by | |
5039 | semi-colons. When concatenating multiple lines of history, the | |
5040 | newline separator for such tokens is replaced with a space. */ | |
3185942a | 5041 | static const int no_semi_successors[] = { |
726f6388 | 5042 | '\n', '{', '(', ')', ';', '&', '|', |
3185942a JA |
5043 | CASE, DO, ELSE, IF, SEMI_SEMI, SEMI_AND, SEMI_SEMI_AND, THEN, UNTIL, |
5044 | WHILE, AND_AND, OR_OR, IN, | |
726f6388 JA |
5045 | 0 |
5046 | }; | |
5047 | ||
5048 | /* If we are not within a delimited expression, try to be smart | |
5049 | about which separators can be semi-colons and which must be | |
ccc6cda3 | 5050 | newlines. Returns the string that should be added into the |
495aee44 CR |
5051 | history entry. LINE is the line we're about to add; it helps |
5052 | make some more intelligent decisions in certain cases. */ | |
726f6388 | 5053 | char * |
495aee44 CR |
5054 | history_delimiting_chars (line) |
5055 | const char *line; | |
726f6388 | 5056 | { |
495aee44 | 5057 | static int last_was_heredoc = 0; /* was the last entry the start of a here document? */ |
ccc6cda3 JA |
5058 | register int i; |
5059 | ||
495aee44 CR |
5060 | if ((parser_state & PST_HEREDOC) == 0) |
5061 | last_was_heredoc = 0; | |
5062 | ||
ccc6cda3 JA |
5063 | if (dstack.delimiter_depth != 0) |
5064 | return ("\n"); | |
3185942a JA |
5065 | |
5066 | /* We look for current_command_line_count == 2 because we are looking to | |
5067 | add the first line of the body of the here document (the second line | |
495aee44 CR |
5068 | of the command). We also keep LAST_WAS_HEREDOC as a private sentinel |
5069 | variable to note when we think we added the first line of a here doc | |
5070 | (the one with a "<<" somewhere in it) */ | |
3185942a | 5071 | if (parser_state & PST_HEREDOC) |
495aee44 CR |
5072 | { |
5073 | if (last_was_heredoc) | |
5074 | { | |
5075 | last_was_heredoc = 0; | |
5076 | return "\n"; | |
5077 | } | |
5078 | return (current_command_line_count == 2 ? "\n" : ""); | |
5079 | } | |
3185942a | 5080 | |
801b47cb CR |
5081 | if (parser_state & PST_COMPASSIGN) |
5082 | return (" "); | |
5083 | ||
ccc6cda3 JA |
5084 | /* First, handle some special cases. */ |
5085 | /*(*/ | |
5086 | /* If we just read `()', assume it's a function definition, and don't | |
5087 | add a semicolon. If the token before the `)' was not `(', and we're | |
5088 | not in the midst of parsing a case statement, assume it's a | |
5089 | parenthesized command and add the semicolon. */ | |
5090 | /*)(*/ | |
5091 | if (token_before_that == ')') | |
726f6388 | 5092 | { |
ccc6cda3 JA |
5093 | if (two_tokens_ago == '(') /*)*/ /* function def */ |
5094 | return " "; | |
5095 | /* This does not work for subshells inside case statement | |
5096 | command lists. It's a suboptimal solution. */ | |
5097 | else if (parser_state & PST_CASESTMT) /* case statement pattern */ | |
28ef6c31 | 5098 | return " "; |
ccc6cda3 | 5099 | else |
28ef6c31 | 5100 | return "; "; /* (...) subshell */ |
ccc6cda3 | 5101 | } |
cce855bc JA |
5102 | else if (token_before_that == WORD && two_tokens_ago == FUNCTION) |
5103 | return " "; /* function def using `function name' without `()' */ | |
726f6388 | 5104 | |
495aee44 CR |
5105 | /* If we're not in a here document, but we think we're about to parse one, |
5106 | and we would otherwise return a `;', return a newline to delimit the | |
5107 | line with the here-doc delimiter */ | |
5108 | else if ((parser_state & PST_HEREDOC) == 0 && current_command_line_count > 1 && last_read_token == '\n' && strstr (line, "<<")) | |
5109 | { | |
5110 | last_was_heredoc = 1; | |
5111 | return "\n"; | |
5112 | } | |
5113 | ||
bb70624e JA |
5114 | else if (token_before_that == WORD && two_tokens_ago == FOR) |
5115 | { | |
5116 | /* Tricky. `for i\nin ...' should not have a semicolon, but | |
5117 | `for i\ndo ...' should. We do what we can. */ | |
3185942a | 5118 | for (i = shell_input_line_index; whitespace (shell_input_line[i]); i++) |
28ef6c31 | 5119 | ; |
bb70624e JA |
5120 | if (shell_input_line[i] && shell_input_line[i] == 'i' && shell_input_line[i+1] == 'n') |
5121 | return " "; | |
5122 | return ";"; | |
5123 | } | |
95732b49 JA |
5124 | else if (two_tokens_ago == CASE && token_before_that == WORD && (parser_state & PST_CASESTMT)) |
5125 | return " "; | |
bb70624e | 5126 | |
ccc6cda3 JA |
5127 | for (i = 0; no_semi_successors[i]; i++) |
5128 | { | |
5129 | if (token_before_that == no_semi_successors[i]) | |
5130 | return (" "); | |
726f6388 | 5131 | } |
ccc6cda3 JA |
5132 | |
5133 | return ("; "); | |
726f6388 JA |
5134 | } |
5135 | #endif /* HISTORY */ | |
5136 | ||
5137 | /* Issue a prompt, or prepare to issue a prompt when the next character | |
5138 | is read. */ | |
5139 | static void | |
5140 | prompt_again () | |
5141 | { | |
5142 | char *temp_prompt; | |
5143 | ||
0001803f | 5144 | if (interactive == 0 || expanding_alias ()) /* XXX */ |
726f6388 JA |
5145 | return; |
5146 | ||
5147 | ps1_prompt = get_string_value ("PS1"); | |
5148 | ps2_prompt = get_string_value ("PS2"); | |
5149 | ||
5150 | if (!prompt_string_pointer) | |
5151 | prompt_string_pointer = &ps1_prompt; | |
5152 | ||
ccc6cda3 | 5153 | temp_prompt = *prompt_string_pointer |
726f6388 JA |
5154 | ? decode_prompt_string (*prompt_string_pointer) |
5155 | : (char *)NULL; | |
5156 | ||
5157 | if (temp_prompt == 0) | |
5158 | { | |
f73dda09 | 5159 | temp_prompt = (char *)xmalloc (1); |
726f6388 JA |
5160 | temp_prompt[0] = '\0'; |
5161 | } | |
5162 | ||
5163 | current_prompt_string = *prompt_string_pointer; | |
5164 | prompt_string_pointer = &ps2_prompt; | |
5165 | ||
5166 | #if defined (READLINE) | |
5167 | if (!no_line_editing) | |
5168 | { | |
5169 | FREE (current_readline_prompt); | |
5170 | current_readline_prompt = temp_prompt; | |
5171 | } | |
5172 | else | |
5173 | #endif /* READLINE */ | |
5174 | { | |
5175 | FREE (current_decoded_prompt); | |
5176 | current_decoded_prompt = temp_prompt; | |
5177 | } | |
5178 | } | |
5179 | ||
bb70624e JA |
5180 | int |
5181 | get_current_prompt_level () | |
5182 | { | |
5183 | return ((current_prompt_string && current_prompt_string == ps2_prompt) ? 2 : 1); | |
5184 | } | |
5185 | ||
5186 | void | |
5187 | set_current_prompt_level (x) | |
5188 | int x; | |
5189 | { | |
5190 | prompt_string_pointer = (x == 2) ? &ps2_prompt : &ps1_prompt; | |
5191 | current_prompt_string = *prompt_string_pointer; | |
5192 | } | |
5193 | ||
726f6388 JA |
5194 | static void |
5195 | print_prompt () | |
5196 | { | |
5197 | fprintf (stderr, "%s", current_decoded_prompt); | |
5198 | fflush (stderr); | |
5199 | } | |
5200 | ||
5201 | /* Return a string which will be printed as a prompt. The string | |
5202 | may contain special characters which are decoded as follows: | |
ccc6cda3 JA |
5203 | |
5204 | \a bell (ascii 07) | |
ccc6cda3 | 5205 | \d the date in Day Mon Date format |
7117c2d2 | 5206 | \e escape (ascii 033) |
ccc6cda3 JA |
5207 | \h the hostname up to the first `.' |
5208 | \H the hostname | |
bb70624e JA |
5209 | \j the number of active jobs |
5210 | \l the basename of the shell's tty device name | |
726f6388 | 5211 | \n CRLF |
7117c2d2 | 5212 | \r CR |
726f6388 | 5213 | \s the name of the shell |
ccc6cda3 JA |
5214 | \t the time in 24-hour hh:mm:ss format |
5215 | \T the time in 12-hour hh:mm:ss format | |
7117c2d2 JA |
5216 | \@ the time in 12-hour hh:mm am/pm format |
5217 | \A the time in 24-hour hh:mm format | |
5218 | \D{fmt} the result of passing FMT to strftime(3) | |
5219 | \u your username | |
ccc6cda3 JA |
5220 | \v the version of bash (e.g., 2.00) |
5221 | \V the release of bash, version + patchlevel (e.g., 2.00.0) | |
726f6388 | 5222 | \w the current working directory |
ccc6cda3 | 5223 | \W the last element of $PWD |
726f6388 | 5224 | \! the history number of this command |
7117c2d2 | 5225 | \# the command number of this command |
726f6388 | 5226 | \$ a $ or a # if you are root |
ccc6cda3 | 5227 | \nnn character code nnn in octal |
726f6388 | 5228 | \\ a backslash |
ccc6cda3 JA |
5229 | \[ begin a sequence of non-printing chars |
5230 | \] end a sequence of non-printing chars | |
726f6388 | 5231 | */ |
d166f048 | 5232 | #define PROMPT_GROWTH 48 |
726f6388 JA |
5233 | char * |
5234 | decode_prompt_string (string) | |
5235 | char *string; | |
5236 | { | |
726f6388 | 5237 | WORD_LIST *list; |
ccc6cda3 JA |
5238 | char *result, *t; |
5239 | struct dstack save_dstack; | |
0001803f | 5240 | int last_exit_value, last_comsub_pid; |
726f6388 | 5241 | #if defined (PROMPT_STRING_DECODE) |
ccc6cda3 | 5242 | int result_size, result_index; |
0628567a | 5243 | int c, n, i; |
ccc6cda3 | 5244 | char *temp, octal_string[4]; |
7117c2d2 | 5245 | struct tm *tm; |
ccc6cda3 | 5246 | time_t the_time; |
7117c2d2 JA |
5247 | char timebuf[128]; |
5248 | char *timefmt; | |
726f6388 | 5249 | |
f73dda09 | 5250 | result = (char *)xmalloc (result_size = PROMPT_GROWTH); |
ccc6cda3 JA |
5251 | result[result_index = 0] = 0; |
5252 | temp = (char *)NULL; | |
726f6388 JA |
5253 | |
5254 | while (c = *string++) | |
5255 | { | |
5256 | if (posixly_correct && c == '!') | |
5257 | { | |
5258 | if (*string == '!') | |
5259 | { | |
5260 | temp = savestring ("!"); | |
5261 | goto add_string; | |
5262 | } | |
5263 | else | |
5264 | { | |
5265 | #if !defined (HISTORY) | |
5266 | temp = savestring ("1"); | |
5267 | #else /* HISTORY */ | |
5268 | temp = itos (history_number ()); | |
5269 | #endif /* HISTORY */ | |
5270 | string--; /* add_string increments string again. */ | |
5271 | goto add_string; | |
5272 | } | |
ccc6cda3 | 5273 | } |
726f6388 JA |
5274 | if (c == '\\') |
5275 | { | |
5276 | c = *string; | |
5277 | ||
5278 | switch (c) | |
5279 | { | |
5280 | case '0': | |
5281 | case '1': | |
5282 | case '2': | |
5283 | case '3': | |
5284 | case '4': | |
5285 | case '5': | |
5286 | case '6': | |
5287 | case '7': | |
ccc6cda3 JA |
5288 | strncpy (octal_string, string, 3); |
5289 | octal_string[3] = '\0'; | |
726f6388 | 5290 | |
ccc6cda3 | 5291 | n = read_octal (octal_string); |
f73dda09 | 5292 | temp = (char *)xmalloc (3); |
726f6388 | 5293 | |
ccc6cda3 JA |
5294 | if (n == CTLESC || n == CTLNUL) |
5295 | { | |
ccc6cda3 JA |
5296 | temp[0] = CTLESC; |
5297 | temp[1] = n; | |
5298 | temp[2] = '\0'; | |
5299 | } | |
5300 | else if (n == -1) | |
5301 | { | |
5302 | temp[0] = '\\'; | |
5303 | temp[1] = '\0'; | |
5304 | } | |
5305 | else | |
5306 | { | |
ccc6cda3 JA |
5307 | temp[0] = n; |
5308 | temp[1] = '\0'; | |
5309 | } | |
726f6388 | 5310 | |
28ef6c31 JA |
5311 | for (c = 0; n != -1 && c < 3 && ISOCTAL (*string); c++) |
5312 | string++; | |
5313 | ||
7117c2d2 | 5314 | c = 0; /* tested at add_string: */ |
ccc6cda3 | 5315 | goto add_string; |
726f6388 | 5316 | |
726f6388 | 5317 | case 'd': |
7117c2d2 | 5318 | case 't': |
ccc6cda3 JA |
5319 | case 'T': |
5320 | case '@': | |
f73dda09 | 5321 | case 'A': |
726f6388 | 5322 | /* Make the current time/date into a string. */ |
7117c2d2 | 5323 | (void) time (&the_time); |
2bbe8058 CR |
5324 | #if defined (HAVE_TZSET) |
5325 | sv_tz ("TZ"); /* XXX -- just make sure */ | |
5326 | #endif | |
7117c2d2 JA |
5327 | tm = localtime (&the_time); |
5328 | ||
5329 | if (c == 'd') | |
5330 | n = strftime (timebuf, sizeof (timebuf), "%a %b %d", tm); | |
5331 | else if (c == 't') | |
5332 | n = strftime (timebuf, sizeof (timebuf), "%H:%M:%S", tm); | |
5333 | else if (c == 'T') | |
5334 | n = strftime (timebuf, sizeof (timebuf), "%I:%M:%S", tm); | |
5335 | else if (c == '@') | |
5336 | n = strftime (timebuf, sizeof (timebuf), "%I:%M %p", tm); | |
5337 | else if (c == 'A') | |
5338 | n = strftime (timebuf, sizeof (timebuf), "%H:%M", tm); | |
5339 | ||
b80f6443 JA |
5340 | if (n == 0) |
5341 | timebuf[0] = '\0'; | |
5342 | else | |
5343 | timebuf[sizeof(timebuf) - 1] = '\0'; | |
5344 | ||
7117c2d2 JA |
5345 | temp = savestring (timebuf); |
5346 | goto add_string; | |
726f6388 | 5347 | |
7117c2d2 JA |
5348 | case 'D': /* strftime format */ |
5349 | if (string[1] != '{') /* } */ | |
5350 | goto not_escape; | |
726f6388 | 5351 | |
7117c2d2 JA |
5352 | (void) time (&the_time); |
5353 | tm = localtime (&the_time); | |
5354 | string += 2; /* skip { */ | |
5355 | timefmt = xmalloc (strlen (string) + 3); | |
5356 | for (t = timefmt; *string && *string != '}'; ) | |
5357 | *t++ = *string++; | |
5358 | *t = '\0'; | |
5359 | c = *string; /* tested at add_string */ | |
5360 | if (timefmt[0] == '\0') | |
ccc6cda3 | 5361 | { |
7117c2d2 JA |
5362 | timefmt[0] = '%'; |
5363 | timefmt[1] = 'X'; /* locale-specific current time */ | |
5364 | timefmt[2] = '\0'; | |
ccc6cda3 | 5365 | } |
7117c2d2 JA |
5366 | n = strftime (timebuf, sizeof (timebuf), timefmt, tm); |
5367 | free (timefmt); | |
5368 | ||
b80f6443 JA |
5369 | if (n == 0) |
5370 | timebuf[0] = '\0'; | |
5371 | else | |
5372 | timebuf[sizeof(timebuf) - 1] = '\0'; | |
5373 | ||
7117c2d2 JA |
5374 | if (promptvars || posixly_correct) |
5375 | /* Make sure that expand_prompt_string is called with a | |
5376 | second argument of Q_DOUBLE_QUOTES if we use this | |
5377 | function here. */ | |
5378 | temp = sh_backslash_quote_for_double_quotes (timebuf); | |
5379 | else | |
5380 | temp = savestring (timebuf); | |
ccc6cda3 | 5381 | goto add_string; |
7117c2d2 | 5382 | |
726f6388 | 5383 | case 'n': |
f73dda09 | 5384 | temp = (char *)xmalloc (3); |
ccc6cda3 JA |
5385 | temp[0] = no_line_editing ? '\n' : '\r'; |
5386 | temp[1] = no_line_editing ? '\0' : '\n'; | |
5387 | temp[2] = '\0'; | |
726f6388 JA |
5388 | goto add_string; |
5389 | ||
5390 | case 's': | |
ccc6cda3 JA |
5391 | temp = base_pathname (shell_name); |
5392 | temp = savestring (temp); | |
5393 | goto add_string; | |
5394 | ||
5395 | case 'v': | |
5396 | case 'V': | |
7117c2d2 | 5397 | temp = (char *)xmalloc (16); |
ccc6cda3 JA |
5398 | if (c == 'v') |
5399 | strcpy (temp, dist_version); | |
5400 | else | |
5401 | sprintf (temp, "%s.%d", dist_version, patch_level); | |
5402 | goto add_string; | |
5403 | ||
726f6388 JA |
5404 | case 'w': |
5405 | case 'W': | |
5406 | { | |
ccc6cda3 | 5407 | /* Use the value of PWD because it is much more efficient. */ |
0628567a | 5408 | char t_string[PATH_MAX]; |
e8ce775d | 5409 | int tlen; |
726f6388 JA |
5410 | |
5411 | temp = get_string_value ("PWD"); | |
5412 | ||
ccc6cda3 JA |
5413 | if (temp == 0) |
5414 | { | |
5415 | if (getcwd (t_string, sizeof(t_string)) == 0) | |
5416 | { | |
28ef6c31 | 5417 | t_string[0] = '.'; |
e8ce775d | 5418 | tlen = 1; |
ccc6cda3 | 5419 | } |
e8ce775d JA |
5420 | else |
5421 | tlen = strlen (t_string); | |
ccc6cda3 | 5422 | } |
726f6388 | 5423 | else |
e8ce775d JA |
5424 | { |
5425 | tlen = sizeof (t_string) - 1; | |
5426 | strncpy (t_string, temp, tlen); | |
5427 | } | |
5428 | t_string[tlen] = '\0'; | |
726f6388 | 5429 | |
0001803f CR |
5430 | #if defined (MACOSX) |
5431 | /* Convert from "fs" format to "input" format */ | |
5432 | temp = fnx_fromfs (t_string, strlen (t_string)); | |
5433 | if (temp != t_string) | |
5434 | strcpy (t_string, temp); | |
5435 | #endif | |
5436 | ||
28ef6c31 JA |
5437 | #define ROOT_PATH(x) ((x)[0] == '/' && (x)[1] == 0) |
5438 | #define DOUBLE_SLASH_ROOT(x) ((x)[0] == '/' && (x)[1] == '/' && (x)[2] == 0) | |
b80f6443 | 5439 | /* Abbreviate \W as ~ if $PWD == $HOME */ |
95732b49 | 5440 | if (c == 'W' && (((t = get_string_value ("HOME")) == 0) || STREQ (t, t_string) == 0)) |
726f6388 | 5441 | { |
28ef6c31 JA |
5442 | if (ROOT_PATH (t_string) == 0 && DOUBLE_SLASH_ROOT (t_string) == 0) |
5443 | { | |
5444 | t = strrchr (t_string, '/'); | |
5445 | if (t) | |
495aee44 | 5446 | memmove (t_string, t + 1, strlen (t)); /* strlen(t) to copy NULL */ |
28ef6c31 | 5447 | } |
726f6388 | 5448 | } |
28ef6c31 JA |
5449 | #undef ROOT_PATH |
5450 | #undef DOUBLE_SLASH_ROOT | |
726f6388 | 5451 | else |
ac50fbac CR |
5452 | { |
5453 | /* polite_directory_format is guaranteed to return a string | |
5454 | no longer than PATH_MAX - 1 characters. */ | |
5455 | temp = polite_directory_format (t_string); | |
5456 | if (temp != t_string) | |
5457 | strcpy (t_string, temp); | |
5458 | } | |
ccc6cda3 | 5459 | |
3185942a | 5460 | temp = trim_pathname (t_string, PATH_MAX - 1); |
ccc6cda3 JA |
5461 | /* If we're going to be expanding the prompt string later, |
5462 | quote the directory name. */ | |
5463 | if (promptvars || posixly_correct) | |
bb70624e | 5464 | /* Make sure that expand_prompt_string is called with a |
7117c2d2 | 5465 | second argument of Q_DOUBLE_QUOTES if we use this |
bb70624e | 5466 | function here. */ |
28ef6c31 | 5467 | temp = sh_backslash_quote_for_double_quotes (t_string); |
ccc6cda3 JA |
5468 | else |
5469 | temp = savestring (t_string); | |
5470 | ||
726f6388 JA |
5471 | goto add_string; |
5472 | } | |
ccc6cda3 | 5473 | |
726f6388 | 5474 | case 'u': |
bb70624e JA |
5475 | if (current_user.user_name == 0) |
5476 | get_current_user_info (); | |
ccc6cda3 JA |
5477 | temp = savestring (current_user.user_name); |
5478 | goto add_string; | |
726f6388 JA |
5479 | |
5480 | case 'h': | |
ccc6cda3 JA |
5481 | case 'H': |
5482 | temp = savestring (current_host_name); | |
5483 | if (c == 'h' && (t = (char *)strchr (temp, '.'))) | |
5484 | *t = '\0'; | |
5485 | goto add_string; | |
726f6388 JA |
5486 | |
5487 | case '#': | |
ccc6cda3 JA |
5488 | temp = itos (current_command_number); |
5489 | goto add_string; | |
726f6388 JA |
5490 | |
5491 | case '!': | |
726f6388 | 5492 | #if !defined (HISTORY) |
ccc6cda3 | 5493 | temp = savestring ("1"); |
726f6388 | 5494 | #else /* HISTORY */ |
ccc6cda3 | 5495 | temp = itos (history_number ()); |
726f6388 | 5496 | #endif /* HISTORY */ |
ccc6cda3 | 5497 | goto add_string; |
726f6388 JA |
5498 | |
5499 | case '$': | |
f73dda09 | 5500 | t = temp = (char *)xmalloc (3); |
b72432fd JA |
5501 | if ((promptvars || posixly_correct) && (current_user.euid != 0)) |
5502 | *t++ = '\\'; | |
5503 | *t++ = current_user.euid == 0 ? '#' : '$'; | |
5504 | *t = '\0'; | |
726f6388 JA |
5505 | goto add_string; |
5506 | ||
bb70624e JA |
5507 | case 'j': |
5508 | temp = itos (count_all_jobs ()); | |
5509 | goto add_string; | |
5510 | ||
5511 | case 'l': | |
5512 | #if defined (HAVE_TTYNAME) | |
5513 | temp = (char *)ttyname (fileno (stdin)); | |
5514 | t = temp ? base_pathname (temp) : "tty"; | |
5515 | temp = savestring (t); | |
5516 | #else | |
5517 | temp = savestring ("tty"); | |
5518 | #endif /* !HAVE_TTYNAME */ | |
5519 | goto add_string; | |
5520 | ||
726f6388 JA |
5521 | #if defined (READLINE) |
5522 | case '[': | |
5523 | case ']': | |
b80f6443 JA |
5524 | if (no_line_editing) |
5525 | { | |
5526 | string++; | |
5527 | break; | |
5528 | } | |
f73dda09 | 5529 | temp = (char *)xmalloc (3); |
0628567a JA |
5530 | n = (c == '[') ? RL_PROMPT_START_IGNORE : RL_PROMPT_END_IGNORE; |
5531 | i = 0; | |
5532 | if (n == CTLESC || n == CTLNUL) | |
5533 | temp[i++] = CTLESC; | |
5534 | temp[i++] = n; | |
5535 | temp[i] = '\0'; | |
726f6388 | 5536 | goto add_string; |
ccc6cda3 | 5537 | #endif /* READLINE */ |
726f6388 JA |
5538 | |
5539 | case '\\': | |
ccc6cda3 JA |
5540 | case 'a': |
5541 | case 'e': | |
7117c2d2 | 5542 | case 'r': |
f73dda09 | 5543 | temp = (char *)xmalloc (2); |
7117c2d2 JA |
5544 | if (c == 'a') |
5545 | temp[0] = '\07'; | |
5546 | else if (c == 'e') | |
5547 | temp[0] = '\033'; | |
5548 | else if (c == 'r') | |
5549 | temp[0] = '\r'; | |
5550 | else /* (c == '\\') */ | |
5551 | temp[0] = c; | |
ccc6cda3 | 5552 | temp[1] = '\0'; |
726f6388 JA |
5553 | goto add_string; |
5554 | ||
5555 | default: | |
7117c2d2 | 5556 | not_escape: |
f73dda09 | 5557 | temp = (char *)xmalloc (3); |
ccc6cda3 | 5558 | temp[0] = '\\'; |
726f6388 | 5559 | temp[1] = c; |
ccc6cda3 | 5560 | temp[2] = '\0'; |
726f6388 JA |
5561 | |
5562 | add_string: | |
5563 | if (c) | |
5564 | string++; | |
5565 | result = | |
5566 | sub_append_string (temp, result, &result_index, &result_size); | |
ccc6cda3 | 5567 | temp = (char *)NULL; /* Freed in sub_append_string (). */ |
726f6388 JA |
5568 | result[result_index] = '\0'; |
5569 | break; | |
5570 | } | |
5571 | } | |
5572 | else | |
5573 | { | |
ccc6cda3 | 5574 | RESIZE_MALLOCED_BUFFER (result, result_index, 3, result_size, PROMPT_GROWTH); |
726f6388 JA |
5575 | result[result_index++] = c; |
5576 | result[result_index] = '\0'; | |
5577 | } | |
5578 | } | |
5579 | #else /* !PROMPT_STRING_DECODE */ | |
5580 | result = savestring (string); | |
5581 | #endif /* !PROMPT_STRING_DECODE */ | |
5582 | ||
ccc6cda3 JA |
5583 | /* Save the delimiter stack and point `dstack' to temp space so any |
5584 | command substitutions in the prompt string won't result in screwing | |
5585 | up the parser's quoting state. */ | |
5586 | save_dstack = dstack; | |
5587 | dstack = temp_dstack; | |
5588 | dstack.delimiter_depth = 0; | |
5589 | ||
726f6388 JA |
5590 | /* Perform variable and parameter expansion and command substitution on |
5591 | the prompt string. */ | |
ccc6cda3 JA |
5592 | if (promptvars || posixly_correct) |
5593 | { | |
f73dda09 | 5594 | last_exit_value = last_command_exit_value; |
0001803f | 5595 | last_comsub_pid = last_command_subst_pid; |
f1be666c | 5596 | list = expand_prompt_string (result, Q_DOUBLE_QUOTES, 0); |
ccc6cda3 JA |
5597 | free (result); |
5598 | result = string_list (list); | |
5599 | dispose_words (list); | |
f73dda09 | 5600 | last_command_exit_value = last_exit_value; |
0001803f | 5601 | last_command_subst_pid = last_comsub_pid; |
ccc6cda3 JA |
5602 | } |
5603 | else | |
5604 | { | |
5605 | t = dequote_string (result); | |
5606 | free (result); | |
5607 | result = t; | |
5608 | } | |
5609 | ||
5610 | dstack = save_dstack; | |
726f6388 JA |
5611 | |
5612 | return (result); | |
5613 | } | |
5614 | ||
7117c2d2 JA |
5615 | /************************************************ |
5616 | * * | |
5617 | * ERROR HANDLING * | |
5618 | * * | |
5619 | ************************************************/ | |
5620 | ||
726f6388 JA |
5621 | /* Report a syntax error, and restart the parser. Call here for fatal |
5622 | errors. */ | |
ccc6cda3 | 5623 | int |
f73dda09 JA |
5624 | yyerror (msg) |
5625 | const char *msg; | |
726f6388 JA |
5626 | { |
5627 | report_syntax_error ((char *)NULL); | |
5628 | reset_parser (); | |
ccc6cda3 | 5629 | return (0); |
726f6388 JA |
5630 | } |
5631 | ||
7117c2d2 | 5632 | static char * |
0628567a JA |
5633 | error_token_from_token (tok) |
5634 | int tok; | |
7117c2d2 JA |
5635 | { |
5636 | char *t; | |
5637 | ||
0628567a | 5638 | if (t = find_token_in_alist (tok, word_token_alist, 0)) |
7117c2d2 JA |
5639 | return t; |
5640 | ||
0628567a | 5641 | if (t = find_token_in_alist (tok, other_token_alist, 0)) |
7117c2d2 JA |
5642 | return t; |
5643 | ||
5644 | t = (char *)NULL; | |
5645 | /* This stuff is dicy and needs closer inspection */ | |
5646 | switch (current_token) | |
5647 | { | |
5648 | case WORD: | |
5649 | case ASSIGNMENT_WORD: | |
5650 | if (yylval.word) | |
5651 | t = savestring (yylval.word->word); | |
5652 | break; | |
5653 | case NUMBER: | |
5654 | t = itos (yylval.number); | |
5655 | break; | |
5656 | case ARITH_CMD: | |
5657 | if (yylval.word_list) | |
5658 | t = string_list (yylval.word_list); | |
5659 | break; | |
5660 | case ARITH_FOR_EXPRS: | |
5661 | if (yylval.word_list) | |
5662 | t = string_list_internal (yylval.word_list, " ; "); | |
5663 | break; | |
5664 | case COND_CMD: | |
5665 | t = (char *)NULL; /* punt */ | |
5666 | break; | |
5667 | } | |
5668 | ||
5669 | return t; | |
5670 | } | |
5671 | ||
5672 | static char * | |
5673 | error_token_from_text () | |
5674 | { | |
5675 | char *msg, *t; | |
5676 | int token_end, i; | |
5677 | ||
5678 | t = shell_input_line; | |
5679 | i = shell_input_line_index; | |
5680 | token_end = 0; | |
5681 | msg = (char *)NULL; | |
5682 | ||
5683 | if (i && t[i] == '\0') | |
5684 | i--; | |
5685 | ||
5686 | while (i && (whitespace (t[i]) || t[i] == '\n')) | |
5687 | i--; | |
5688 | ||
5689 | if (i) | |
5690 | token_end = i + 1; | |
5691 | ||
5692 | while (i && (member (t[i], " \n\t;|&") == 0)) | |
5693 | i--; | |
5694 | ||
5695 | while (i != token_end && (whitespace (t[i]) || t[i] == '\n')) | |
5696 | i++; | |
5697 | ||
5698 | /* Return our idea of the offending token. */ | |
5699 | if (token_end || (i == 0 && token_end == 0)) | |
5700 | { | |
5701 | if (token_end) | |
5702 | msg = substring (t, i, token_end); | |
5703 | else /* one-character token */ | |
5704 | { | |
5705 | msg = (char *)xmalloc (2); | |
5706 | msg[0] = t[i]; | |
5707 | msg[1] = '\0'; | |
5708 | } | |
5709 | } | |
5710 | ||
5711 | return (msg); | |
5712 | } | |
5713 | ||
5714 | static void | |
5715 | print_offending_line () | |
5716 | { | |
5717 | char *msg; | |
5718 | int token_end; | |
5719 | ||
5720 | msg = savestring (shell_input_line); | |
5721 | token_end = strlen (msg); | |
5722 | while (token_end && msg[token_end - 1] == '\n') | |
5723 | msg[--token_end] = '\0'; | |
5724 | ||
5725 | parser_error (line_number, "`%s'", msg); | |
5726 | free (msg); | |
5727 | } | |
5728 | ||
726f6388 JA |
5729 | /* Report a syntax error with line numbers, etc. |
5730 | Call here for recoverable errors. If you have a message to print, | |
5731 | then place it in MESSAGE, otherwise pass NULL and this will figure | |
5732 | out an appropriate message for you. */ | |
5733 | static void | |
5734 | report_syntax_error (message) | |
5735 | char *message; | |
5736 | { | |
495aee44 | 5737 | char *msg, *p; |
ccc6cda3 | 5738 | |
726f6388 JA |
5739 | if (message) |
5740 | { | |
ccc6cda3 JA |
5741 | parser_error (line_number, "%s", message); |
5742 | if (interactive && EOF_Reached) | |
5743 | EOF_Reached = 0; | |
0001803f | 5744 | last_command_exit_value = parse_and_execute_level ? EX_BADSYNTAX : EX_BADUSAGE; |
726f6388 JA |
5745 | return; |
5746 | } | |
5747 | ||
ccc6cda3 | 5748 | /* If the line of input we're reading is not null, try to find the |
7117c2d2 JA |
5749 | objectionable token. First, try to figure out what token the |
5750 | parser's complaining about by looking at current_token. */ | |
5751 | if (current_token != 0 && EOF_Reached == 0 && (msg = error_token_from_token (current_token))) | |
726f6388 | 5752 | { |
495aee44 CR |
5753 | if (ansic_shouldquote (msg)) |
5754 | { | |
5755 | p = ansic_quote (msg, 0, NULL); | |
5756 | free (msg); | |
5757 | msg = p; | |
5758 | } | |
b80f6443 | 5759 | parser_error (line_number, _("syntax error near unexpected token `%s'"), msg); |
7117c2d2 | 5760 | free (msg); |
726f6388 | 5761 | |
7117c2d2 JA |
5762 | if (interactive == 0) |
5763 | print_offending_line (); | |
726f6388 | 5764 | |
0001803f | 5765 | last_command_exit_value = parse_and_execute_level ? EX_BADSYNTAX : EX_BADUSAGE; |
7117c2d2 JA |
5766 | return; |
5767 | } | |
726f6388 | 5768 | |
7117c2d2 JA |
5769 | /* If looking at the current token doesn't prove fruitful, try to find the |
5770 | offending token by analyzing the text of the input line near the current | |
5771 | input line index and report what we find. */ | |
5772 | if (shell_input_line && *shell_input_line) | |
5773 | { | |
5774 | msg = error_token_from_text (); | |
5775 | if (msg) | |
726f6388 | 5776 | { |
b80f6443 | 5777 | parser_error (line_number, _("syntax error near `%s'"), msg); |
7117c2d2 | 5778 | free (msg); |
726f6388 JA |
5779 | } |
5780 | ||
ccc6cda3 JA |
5781 | /* If not interactive, print the line containing the error. */ |
5782 | if (interactive == 0) | |
7117c2d2 | 5783 | print_offending_line (); |
726f6388 JA |
5784 | } |
5785 | else | |
5786 | { | |
b80f6443 | 5787 | msg = EOF_Reached ? _("syntax error: unexpected end of file") : _("syntax error"); |
ccc6cda3 JA |
5788 | parser_error (line_number, "%s", msg); |
5789 | /* When the shell is interactive, this file uses EOF_Reached | |
5790 | only for error reporting. Other mechanisms are used to | |
5791 | decide whether or not to exit. */ | |
5792 | if (interactive && EOF_Reached) | |
5793 | EOF_Reached = 0; | |
726f6388 | 5794 | } |
7117c2d2 | 5795 | |
0001803f | 5796 | last_command_exit_value = parse_and_execute_level ? EX_BADSYNTAX : EX_BADUSAGE; |
726f6388 JA |
5797 | } |
5798 | ||
5799 | /* ??? Needed function. ??? We have to be able to discard the constructs | |
5800 | created during parsing. In the case of error, we want to return | |
5801 | allocated objects to the memory pool. In the case of no error, we want | |
5802 | to throw away the information about where the allocated objects live. | |
7117c2d2 | 5803 | (dispose_command () will actually free the command.) */ |
ccc6cda3 | 5804 | static void |
726f6388 JA |
5805 | discard_parser_constructs (error_p) |
5806 | int error_p; | |
5807 | { | |
5808 | } | |
ccc6cda3 | 5809 | |
7117c2d2 JA |
5810 | /************************************************ |
5811 | * * | |
5812 | * EOF HANDLING * | |
5813 | * * | |
5814 | ************************************************/ | |
5815 | ||
726f6388 JA |
5816 | /* Do that silly `type "bye" to exit' stuff. You know, "ignoreeof". */ |
5817 | ||
5818 | /* A flag denoting whether or not ignoreeof is set. */ | |
5819 | int ignoreeof = 0; | |
5820 | ||
5821 | /* The number of times that we have encountered an EOF character without | |
5822 | another character intervening. When this gets above the limit, the | |
5823 | shell terminates. */ | |
5824 | int eof_encountered = 0; | |
5825 | ||
5826 | /* The limit for eof_encountered. */ | |
5827 | int eof_encountered_limit = 10; | |
5828 | ||
5829 | /* If we have EOF as the only input unit, this user wants to leave | |
5830 | the shell. If the shell is not interactive, then just leave. | |
5831 | Otherwise, if ignoreeof is set, and we haven't done this the | |
5832 | required number of times in a row, print a message. */ | |
5833 | static void | |
5834 | handle_eof_input_unit () | |
5835 | { | |
5836 | if (interactive) | |
5837 | { | |
5838 | /* shell.c may use this to decide whether or not to write out the | |
5839 | history, among other things. We use it only for error reporting | |
5840 | in this file. */ | |
5841 | if (EOF_Reached) | |
5842 | EOF_Reached = 0; | |
5843 | ||
5844 | /* If the user wants to "ignore" eof, then let her do so, kind of. */ | |
5845 | if (ignoreeof) | |
5846 | { | |
5847 | if (eof_encountered < eof_encountered_limit) | |
5848 | { | |
b80f6443 | 5849 | fprintf (stderr, _("Use \"%s\" to leave the shell.\n"), |
726f6388 JA |
5850 | login_shell ? "logout" : "exit"); |
5851 | eof_encountered++; | |
7117c2d2 JA |
5852 | /* Reset the parsing state. */ |
5853 | last_read_token = current_token = '\n'; | |
726f6388 JA |
5854 | /* Reset the prompt string to be $PS1. */ |
5855 | prompt_string_pointer = (char **)NULL; | |
5856 | prompt_again (); | |
726f6388 | 5857 | return; |
ccc6cda3 | 5858 | } |
726f6388 JA |
5859 | } |
5860 | ||
5861 | /* In this case EOF should exit the shell. Do it now. */ | |
5862 | reset_parser (); | |
5863 | exit_builtin ((WORD_LIST *)NULL); | |
5864 | } | |
5865 | else | |
5866 | { | |
5867 | /* We don't write history files, etc., for non-interactive shells. */ | |
5868 | EOF_Reached = 1; | |
5869 | } | |
5870 | } | |
bb70624e | 5871 | |
7117c2d2 JA |
5872 | /************************************************ |
5873 | * * | |
5874 | * STRING PARSING FUNCTIONS * | |
5875 | * * | |
5876 | ************************************************/ | |
5877 | ||
5878 | /* It's very important that these two functions treat the characters | |
5879 | between ( and ) identically. */ | |
5880 | ||
bb70624e JA |
5881 | static WORD_LIST parse_string_error; |
5882 | ||
5883 | /* Take a string and run it through the shell parser, returning the | |
5884 | resultant word list. Used by compound array assignment. */ | |
5885 | WORD_LIST * | |
b80f6443 | 5886 | parse_string_to_word_list (s, flags, whom) |
f73dda09 | 5887 | char *s; |
b80f6443 | 5888 | int flags; |
f73dda09 | 5889 | const char *whom; |
bb70624e JA |
5890 | { |
5891 | WORD_LIST *wl; | |
7117c2d2 | 5892 | int tok, orig_current_token, orig_line_number, orig_input_terminator; |
28ef6c31 | 5893 | int orig_line_count; |
7117c2d2 | 5894 | int old_echo_input, old_expand_aliases; |
bb70624e JA |
5895 | #if defined (HISTORY) |
5896 | int old_remember_on_history, old_history_expansion_inhibited; | |
5897 | #endif | |
5898 | ||
5899 | #if defined (HISTORY) | |
5900 | old_remember_on_history = remember_on_history; | |
5901 | # if defined (BANG_HISTORY) | |
5902 | old_history_expansion_inhibited = history_expansion_inhibited; | |
5903 | # endif | |
5904 | bash_history_disable (); | |
5905 | #endif | |
5906 | ||
5907 | orig_line_number = line_number; | |
28ef6c31 | 5908 | orig_line_count = current_command_line_count; |
bb70624e | 5909 | orig_input_terminator = shell_input_line_terminator; |
7117c2d2 JA |
5910 | old_echo_input = echo_input_at_read; |
5911 | old_expand_aliases = expand_aliases; | |
bb70624e JA |
5912 | |
5913 | push_stream (1); | |
7117c2d2 | 5914 | last_read_token = WORD; /* WORD to allow reserved words here */ |
28ef6c31 | 5915 | current_command_line_count = 0; |
7117c2d2 | 5916 | echo_input_at_read = expand_aliases = 0; |
bb70624e JA |
5917 | |
5918 | with_input_from_string (s, whom); | |
5919 | wl = (WORD_LIST *)NULL; | |
b80f6443 JA |
5920 | |
5921 | if (flags & 1) | |
3185942a | 5922 | parser_state |= PST_COMPASSIGN|PST_REPARSE; |
b80f6443 | 5923 | |
bb70624e JA |
5924 | while ((tok = read_token (READ)) != yacc_EOF) |
5925 | { | |
5926 | if (tok == '\n' && *bash_input.location.string == '\0') | |
5927 | break; | |
28ef6c31 JA |
5928 | if (tok == '\n') /* Allow newlines in compound assignments */ |
5929 | continue; | |
bb70624e JA |
5930 | if (tok != WORD && tok != ASSIGNMENT_WORD) |
5931 | { | |
5932 | line_number = orig_line_number + line_number - 1; | |
7117c2d2 JA |
5933 | orig_current_token = current_token; |
5934 | current_token = tok; | |
95732b49 | 5935 | yyerror (NULL); /* does the right thing */ |
7117c2d2 | 5936 | current_token = orig_current_token; |
bb70624e JA |
5937 | if (wl) |
5938 | dispose_words (wl); | |
5939 | wl = &parse_string_error; | |
5940 | break; | |
5941 | } | |
5942 | wl = make_word_list (yylval.word, wl); | |
5943 | } | |
5944 | ||
5945 | last_read_token = '\n'; | |
5946 | pop_stream (); | |
5947 | ||
5948 | #if defined (HISTORY) | |
5949 | remember_on_history = old_remember_on_history; | |
5950 | # if defined (BANG_HISTORY) | |
5951 | history_expansion_inhibited = old_history_expansion_inhibited; | |
5952 | # endif /* BANG_HISTORY */ | |
5953 | #endif /* HISTORY */ | |
5954 | ||
7117c2d2 JA |
5955 | echo_input_at_read = old_echo_input; |
5956 | expand_aliases = old_expand_aliases; | |
5957 | ||
28ef6c31 | 5958 | current_command_line_count = orig_line_count; |
bb70624e JA |
5959 | shell_input_line_terminator = orig_input_terminator; |
5960 | ||
b80f6443 | 5961 | if (flags & 1) |
3185942a | 5962 | parser_state &= ~(PST_COMPASSIGN|PST_REPARSE); |
b80f6443 | 5963 | |
bb70624e JA |
5964 | if (wl == &parse_string_error) |
5965 | { | |
5966 | last_command_exit_value = EXECUTION_FAILURE; | |
5967 | if (interactive_shell == 0 && posixly_correct) | |
5968 | jump_to_top_level (FORCE_EOF); | |
5969 | else | |
5970 | jump_to_top_level (DISCARD); | |
5971 | } | |
5972 | ||
5973 | return (REVERSE_LIST (wl, WORD_LIST *)); | |
5974 | } | |
7117c2d2 JA |
5975 | |
5976 | static char * | |
5977 | parse_compound_assignment (retlenp) | |
5978 | int *retlenp; | |
5979 | { | |
5980 | WORD_LIST *wl, *rl; | |
0628567a | 5981 | int tok, orig_line_number, orig_token_size, orig_last_token, assignok; |
7117c2d2 JA |
5982 | char *saved_token, *ret; |
5983 | ||
5984 | saved_token = token; | |
5985 | orig_token_size = token_buffer_size; | |
5986 | orig_line_number = line_number; | |
0628567a | 5987 | orig_last_token = last_read_token; |
7117c2d2 JA |
5988 | |
5989 | last_read_token = WORD; /* WORD to allow reserved words here */ | |
5990 | ||
5991 | token = (char *)NULL; | |
5992 | token_buffer_size = 0; | |
5993 | ||
0628567a JA |
5994 | assignok = parser_state&PST_ASSIGNOK; /* XXX */ |
5995 | ||
7117c2d2 | 5996 | wl = (WORD_LIST *)NULL; /* ( */ |
b80f6443 JA |
5997 | parser_state |= PST_COMPASSIGN; |
5998 | ||
7117c2d2 JA |
5999 | while ((tok = read_token (READ)) != ')') |
6000 | { | |
6001 | if (tok == '\n') /* Allow newlines in compound assignments */ | |
b80f6443 JA |
6002 | { |
6003 | if (SHOULD_PROMPT ()) | |
6004 | prompt_again (); | |
6005 | continue; | |
6006 | } | |
7117c2d2 JA |
6007 | if (tok != WORD && tok != ASSIGNMENT_WORD) |
6008 | { | |
6009 | current_token = tok; /* for error reporting */ | |
6010 | if (tok == yacc_EOF) /* ( */ | |
b80f6443 | 6011 | parser_error (orig_line_number, _("unexpected EOF while looking for matching `)'")); |
7117c2d2 | 6012 | else |
95732b49 | 6013 | yyerror(NULL); /* does the right thing */ |
7117c2d2 JA |
6014 | if (wl) |
6015 | dispose_words (wl); | |
6016 | wl = &parse_string_error; | |
6017 | break; | |
6018 | } | |
6019 | wl = make_word_list (yylval.word, wl); | |
6020 | } | |
6021 | ||
6022 | FREE (token); | |
6023 | token = saved_token; | |
6024 | token_buffer_size = orig_token_size; | |
6025 | ||
b80f6443 JA |
6026 | parser_state &= ~PST_COMPASSIGN; |
6027 | ||
7117c2d2 JA |
6028 | if (wl == &parse_string_error) |
6029 | { | |
6030 | last_command_exit_value = EXECUTION_FAILURE; | |
6031 | last_read_token = '\n'; /* XXX */ | |
6032 | if (interactive_shell == 0 && posixly_correct) | |
6033 | jump_to_top_level (FORCE_EOF); | |
6034 | else | |
6035 | jump_to_top_level (DISCARD); | |
6036 | } | |
6037 | ||
0628567a JA |
6038 | last_read_token = orig_last_token; /* XXX - was WORD? */ |
6039 | ||
7117c2d2 JA |
6040 | if (wl) |
6041 | { | |
6042 | rl = REVERSE_LIST (wl, WORD_LIST *); | |
6043 | ret = string_list (rl); | |
6044 | dispose_words (rl); | |
6045 | } | |
6046 | else | |
6047 | ret = (char *)NULL; | |
6048 | ||
6049 | if (retlenp) | |
6050 | *retlenp = (ret && *ret) ? strlen (ret) : 0; | |
0628567a JA |
6051 | |
6052 | if (assignok) | |
6053 | parser_state |= PST_ASSIGNOK; | |
6054 | ||
7117c2d2 JA |
6055 | return ret; |
6056 | } | |
6057 | ||
b80f6443 JA |
6058 | /************************************************ |
6059 | * * | |
6060 | * SAVING AND RESTORING PARTIAL PARSE STATE * | |
6061 | * * | |
6062 | ************************************************/ | |
6063 | ||
6064 | sh_parser_state_t * | |
6065 | save_parser_state (ps) | |
6066 | sh_parser_state_t *ps; | |
6067 | { | |
b80f6443 | 6068 | if (ps == 0) |
95732b49 | 6069 | ps = (sh_parser_state_t *)xmalloc (sizeof (sh_parser_state_t)); |
b80f6443 JA |
6070 | if (ps == 0) |
6071 | return ((sh_parser_state_t *)NULL); | |
6072 | ||
6073 | ps->parser_state = parser_state; | |
6074 | ps->token_state = save_token_state (); | |
6075 | ||
6076 | ps->input_line_terminator = shell_input_line_terminator; | |
6077 | ps->eof_encountered = eof_encountered; | |
6078 | ||
495aee44 CR |
6079 | ps->prompt_string_pointer = prompt_string_pointer; |
6080 | ||
b80f6443 JA |
6081 | ps->current_command_line_count = current_command_line_count; |
6082 | ||
6083 | #if defined (HISTORY) | |
6084 | ps->remember_on_history = remember_on_history; | |
6085 | # if defined (BANG_HISTORY) | |
6086 | ps->history_expansion_inhibited = history_expansion_inhibited; | |
6087 | # endif | |
6088 | #endif | |
6089 | ||
6090 | ps->last_command_exit_value = last_command_exit_value; | |
6091 | #if defined (ARRAY_VARS) | |
495aee44 | 6092 | ps->pipestatus = save_pipestatus_array (); |
b80f6443 JA |
6093 | #endif |
6094 | ||
6095 | ps->last_shell_builtin = last_shell_builtin; | |
6096 | ps->this_shell_builtin = this_shell_builtin; | |
6097 | ||
6098 | ps->expand_aliases = expand_aliases; | |
6099 | ps->echo_input_at_read = echo_input_at_read; | |
daefb2c5 | 6100 | ps->need_here_doc = need_here_doc; |
b80f6443 | 6101 | |
b4839c27 CR |
6102 | ps->token = token; |
6103 | ps->token_buffer_size = token_buffer_size; | |
6104 | /* Force reallocation on next call to read_token_word */ | |
6105 | token = 0; | |
6106 | token_buffer_size = 0; | |
6107 | ||
b80f6443 JA |
6108 | return (ps); |
6109 | } | |
6110 | ||
6111 | void | |
6112 | restore_parser_state (ps) | |
6113 | sh_parser_state_t *ps; | |
6114 | { | |
b80f6443 JA |
6115 | if (ps == 0) |
6116 | return; | |
6117 | ||
6118 | parser_state = ps->parser_state; | |
6119 | if (ps->token_state) | |
6120 | { | |
6121 | restore_token_state (ps->token_state); | |
6122 | free (ps->token_state); | |
6123 | } | |
6124 | ||
6125 | shell_input_line_terminator = ps->input_line_terminator; | |
6126 | eof_encountered = ps->eof_encountered; | |
6127 | ||
495aee44 CR |
6128 | prompt_string_pointer = ps->prompt_string_pointer; |
6129 | ||
b80f6443 JA |
6130 | current_command_line_count = ps->current_command_line_count; |
6131 | ||
6132 | #if defined (HISTORY) | |
6133 | remember_on_history = ps->remember_on_history; | |
6134 | # if defined (BANG_HISTORY) | |
6135 | history_expansion_inhibited = ps->history_expansion_inhibited; | |
6136 | # endif | |
6137 | #endif | |
6138 | ||
6139 | last_command_exit_value = ps->last_command_exit_value; | |
6140 | #if defined (ARRAY_VARS) | |
495aee44 | 6141 | restore_pipestatus_array (ps->pipestatus); |
b80f6443 JA |
6142 | #endif |
6143 | ||
6144 | last_shell_builtin = ps->last_shell_builtin; | |
6145 | this_shell_builtin = ps->this_shell_builtin; | |
6146 | ||
6147 | expand_aliases = ps->expand_aliases; | |
6148 | echo_input_at_read = ps->echo_input_at_read; | |
daefb2c5 | 6149 | need_here_doc = ps->need_here_doc; |
b4839c27 CR |
6150 | |
6151 | FREE (token); | |
6152 | token = ps->token; | |
6153 | token_buffer_size = ps->token_buffer_size; | |
6154 | } | |
6155 | ||
6156 | sh_input_line_state_t * | |
6157 | save_input_line_state (ls) | |
6158 | sh_input_line_state_t *ls; | |
6159 | { | |
6160 | if (ls == 0) | |
6161 | ls = (sh_input_line_state_t *)xmalloc (sizeof (sh_input_line_state_t)); | |
6162 | if (ls == 0) | |
6163 | return ((sh_input_line_state_t *)NULL); | |
6164 | ||
6165 | ls->input_line = shell_input_line; | |
6166 | ls->input_line_size = shell_input_line_size; | |
6167 | ls->input_line_len = shell_input_line_len; | |
6168 | ls->input_line_index = shell_input_line_index; | |
6169 | ||
6170 | /* force reallocation */ | |
6171 | shell_input_line = 0; | |
6172 | shell_input_line_size = shell_input_line_len = shell_input_line_index = 0; | |
ac50fbac CR |
6173 | |
6174 | return ls; | |
b4839c27 CR |
6175 | } |
6176 | ||
6177 | void | |
6178 | restore_input_line_state (ls) | |
6179 | sh_input_line_state_t *ls; | |
6180 | { | |
6181 | FREE (shell_input_line); | |
6182 | shell_input_line = ls->input_line; | |
6183 | shell_input_line_size = ls->input_line_size; | |
6184 | shell_input_line_len = ls->input_line_len; | |
6185 | shell_input_line_index = ls->input_line_index; | |
6186 | ||
6187 | set_line_mbstate (); | |
b80f6443 JA |
6188 | } |
6189 | ||
7117c2d2 JA |
6190 | /************************************************ |
6191 | * * | |
6192 | * MULTIBYTE CHARACTER HANDLING * | |
6193 | * * | |
6194 | ************************************************/ | |
6195 | ||
6196 | #if defined (HANDLE_MULTIBYTE) | |
6197 | static void | |
6198 | set_line_mbstate () | |
6199 | { | |
ac50fbac CR |
6200 | int c; |
6201 | size_t i, previ, len; | |
7117c2d2 JA |
6202 | mbstate_t mbs, prevs; |
6203 | size_t mbclen; | |
6204 | ||
6205 | if (shell_input_line == NULL) | |
6206 | return; | |
6207 | len = strlen (shell_input_line); /* XXX - shell_input_line_len ? */ | |
6208 | FREE (shell_input_line_property); | |
6209 | shell_input_line_property = (char *)xmalloc (len + 1); | |
6210 | ||
6211 | memset (&prevs, '\0', sizeof (mbstate_t)); | |
6212 | for (i = previ = 0; i < len; i++) | |
6213 | { | |
6214 | mbs = prevs; | |
6215 | ||
b80f6443 JA |
6216 | c = shell_input_line[i]; |
6217 | if (c == EOF) | |
7117c2d2 | 6218 | { |
ac50fbac | 6219 | size_t j; |
7117c2d2 JA |
6220 | for (j = i; j < len; j++) |
6221 | shell_input_line_property[j] = 1; | |
6222 | break; | |
6223 | } | |
6224 | ||
6225 | mbclen = mbrlen (shell_input_line + previ, i - previ + 1, &mbs); | |
6226 | if (mbclen == 1 || mbclen == (size_t)-1) | |
6227 | { | |
6228 | mbclen = 1; | |
6229 | previ = i + 1; | |
6230 | } | |
6231 | else if (mbclen == (size_t)-2) | |
6232 | mbclen = 0; | |
6233 | else if (mbclen > 1) | |
6234 | { | |
6235 | mbclen = 0; | |
6236 | previ = i + 1; | |
6237 | prevs = mbs; | |
6238 | } | |
6239 | else | |
6240 | { | |
b80f6443 | 6241 | /* XXX - what to do if mbrlen returns 0? (null wide character) */ |
ac50fbac | 6242 | size_t j; |
b80f6443 JA |
6243 | for (j = i; j < len; j++) |
6244 | shell_input_line_property[j] = 1; | |
6245 | break; | |
7117c2d2 JA |
6246 | } |
6247 | ||
6248 | shell_input_line_property[i] = mbclen; | |
6249 | } | |
6250 | } | |
6251 | #endif /* HANDLE_MULTIBYTE */ |