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Commit | Line | Data |
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3185942a | 1 | /* parse.y - Yacc grammar for bash. */ |
726f6388 | 2 | |
d233b485 | 3 | /* Copyright (C) 1989-2017 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" |
d233b485 | 48 | #include "execute_cmd.h" |
ac50fbac | 49 | #include "typemax.h" /* SIZE_MAX if needed */ |
ccc6cda3 | 50 | #include "trap.h" |
726f6388 | 51 | #include "flags.h" |
ccc6cda3 JA |
52 | #include "parser.h" |
53 | #include "mailcheck.h" | |
f73dda09 | 54 | #include "test.h" |
95732b49 | 55 | #include "builtins.h" |
ccc6cda3 JA |
56 | #include "builtins/common.h" |
57 | #include "builtins/builtext.h" | |
726f6388 | 58 | |
7117c2d2 JA |
59 | #include "shmbutil.h" |
60 | ||
726f6388 | 61 | #if defined (READLINE) |
ccc6cda3 | 62 | # include "bashline.h" |
726f6388 JA |
63 | # include <readline/readline.h> |
64 | #endif /* READLINE */ | |
65 | ||
66 | #if defined (HISTORY) | |
67 | # include "bashhist.h" | |
68 | # include <readline/history.h> | |
69 | #endif /* HISTORY */ | |
70 | ||
71 | #if defined (JOB_CONTROL) | |
72 | # include "jobs.h" | |
a0c0a00f CR |
73 | #else |
74 | extern int cleanup_dead_jobs __P((void)); | |
726f6388 JA |
75 | #endif /* JOB_CONTROL */ |
76 | ||
77 | #if defined (ALIAS) | |
78 | # include "alias.h" | |
b80f6443 JA |
79 | #else |
80 | typedef void *alias_t; | |
726f6388 JA |
81 | #endif /* ALIAS */ |
82 | ||
83 | #if defined (PROMPT_STRING_DECODE) | |
cce855bc JA |
84 | # ifndef _MINIX |
85 | # include <sys/param.h> | |
86 | # endif | |
87 | # include <time.h> | |
7117c2d2 JA |
88 | # if defined (TM_IN_SYS_TIME) |
89 | # include <sys/types.h> | |
90 | # include <sys/time.h> | |
91 | # endif /* TM_IN_SYS_TIME */ | |
cce855bc | 92 | # include "maxpath.h" |
726f6388 JA |
93 | #endif /* PROMPT_STRING_DECODE */ |
94 | ||
ccc6cda3 JA |
95 | #define RE_READ_TOKEN -99 |
96 | #define NO_EXPANSION -100 | |
97 | ||
d233b485 CR |
98 | #define END_ALIAS -2 |
99 | ||
7117c2d2 JA |
100 | #ifdef DEBUG |
101 | # define YYDEBUG 1 | |
102 | #else | |
103 | # define YYDEBUG 0 | |
104 | #endif | |
105 | ||
106 | #if defined (HANDLE_MULTIBYTE) | |
107 | # define last_shell_getc_is_singlebyte \ | |
108 | ((shell_input_line_index > 1) \ | |
109 | ? shell_input_line_property[shell_input_line_index - 1] \ | |
110 | : 1) | |
111 | # define MBTEST(x) ((x) && last_shell_getc_is_singlebyte) | |
112 | #else | |
113 | # define last_shell_getc_is_singlebyte 1 | |
114 | # define MBTEST(x) ((x)) | |
115 | #endif | |
ccc6cda3 | 116 | |
cce855bc | 117 | #if defined (EXTENDED_GLOB) |
cce855bc JA |
118 | extern int extended_glob; |
119 | #endif | |
120 | ||
cce855bc | 121 | extern int dump_translatable_strings, dump_po_strings; |
726f6388 | 122 | |
d233b485 | 123 | #if !defined (errno) |
bb70624e | 124 | extern int errno; |
d233b485 CR |
125 | #endif |
126 | ||
726f6388 JA |
127 | /* **************************************************************** */ |
128 | /* */ | |
129 | /* "Forward" declarations */ | |
130 | /* */ | |
131 | /* **************************************************************** */ | |
132 | ||
f73dda09 JA |
133 | #ifdef DEBUG |
134 | static void debug_parser __P((int)); | |
135 | #endif | |
136 | ||
137 | static int yy_getc __P((void)); | |
138 | static int yy_ungetc __P((int)); | |
139 | ||
140 | #if defined (READLINE) | |
141 | static int yy_readline_get __P((void)); | |
142 | static int yy_readline_unget __P((int)); | |
143 | #endif | |
144 | ||
145 | static int yy_string_get __P((void)); | |
146 | static int yy_string_unget __P((int)); | |
3185942a | 147 | static void rewind_input_string __P((void)); |
f73dda09 JA |
148 | static int yy_stream_get __P((void)); |
149 | static int yy_stream_unget __P((int)); | |
150 | ||
151 | static int shell_getc __P((int)); | |
152 | static void shell_ungetc __P((int)); | |
153 | static void discard_until __P((int)); | |
154 | ||
155 | #if defined (ALIAS) || defined (DPAREN_ARITHMETIC) | |
156 | static void push_string __P((char *, int, alias_t *)); | |
157 | static void pop_string __P((void)); | |
158 | static void free_string_list __P((void)); | |
159 | #endif | |
160 | ||
161 | static char *read_a_line __P((int)); | |
162 | ||
f73dda09 JA |
163 | static int reserved_word_acceptable __P((int)); |
164 | static int yylex __P((void)); | |
90a39f32 CR |
165 | |
166 | static void push_heredoc __P((REDIRECT *)); | |
167 | static char *mk_alexpansion __P((char *)); | |
f73dda09 JA |
168 | static int alias_expand_token __P((char *)); |
169 | static int time_command_acceptable __P((void)); | |
170 | static int special_case_tokens __P((char *)); | |
171 | static int read_token __P((int)); | |
172 | static char *parse_matched_pair __P((int, int, int, int *, int)); | |
3185942a | 173 | static char *parse_comsub __P((int, int, int, int *, int)); |
7117c2d2 JA |
174 | #if defined (ARRAY_VARS) |
175 | static char *parse_compound_assignment __P((int *)); | |
176 | #endif | |
f73dda09 | 177 | #if defined (DPAREN_ARITHMETIC) || defined (ARITH_FOR_COMMAND) |
7117c2d2 | 178 | static int parse_dparen __P((int)); |
b80f6443 | 179 | static int parse_arith_cmd __P((char **, int)); |
f73dda09 | 180 | #endif |
cce855bc | 181 | #if defined (COND_COMMAND) |
7117c2d2 | 182 | static void cond_error __P((void)); |
f73dda09 JA |
183 | static COND_COM *cond_expr __P((void)); |
184 | static COND_COM *cond_or __P((void)); | |
185 | static COND_COM *cond_and __P((void)); | |
186 | static COND_COM *cond_term __P((void)); | |
187 | static int cond_skip_newlines __P((void)); | |
188 | static COMMAND *parse_cond_command __P((void)); | |
cce855bc | 189 | #endif |
7117c2d2 JA |
190 | #if defined (ARRAY_VARS) |
191 | static int token_is_assignment __P((char *, int)); | |
192 | static int token_is_ident __P((char *, int)); | |
193 | #endif | |
f73dda09 JA |
194 | static int read_token_word __P((int)); |
195 | static void discard_parser_constructs __P((int)); | |
726f6388 | 196 | |
7117c2d2 JA |
197 | static char *error_token_from_token __P((int)); |
198 | static char *error_token_from_text __P((void)); | |
199 | static void print_offending_line __P((void)); | |
f73dda09 | 200 | static void report_syntax_error __P((char *)); |
7117c2d2 | 201 | |
f73dda09 JA |
202 | static void handle_eof_input_unit __P((void)); |
203 | static void prompt_again __P((void)); | |
d166f048 | 204 | #if 0 |
f73dda09 | 205 | static void reset_readline_prompt __P((void)); |
d166f048 | 206 | #endif |
f73dda09 | 207 | static void print_prompt __P((void)); |
726f6388 | 208 | |
7117c2d2 JA |
209 | #if defined (HANDLE_MULTIBYTE) |
210 | static void set_line_mbstate __P((void)); | |
211 | static char *shell_input_line_property = NULL; | |
d233b485 | 212 | static size_t shell_input_line_propsize = 0; |
7117c2d2 JA |
213 | #else |
214 | # define set_line_mbstate() | |
215 | #endif | |
216 | ||
f73dda09 | 217 | extern int yyerror __P((const char *)); |
d166f048 | 218 | |
7117c2d2 JA |
219 | #ifdef DEBUG |
220 | extern int yydebug; | |
221 | #endif | |
222 | ||
ccc6cda3 JA |
223 | /* Default prompt strings */ |
224 | char *primary_prompt = PPROMPT; | |
225 | char *secondary_prompt = SPROMPT; | |
226 | ||
726f6388 JA |
227 | /* PROMPT_STRING_POINTER points to one of these, never to an actual string. */ |
228 | char *ps1_prompt, *ps2_prompt; | |
229 | ||
a0c0a00f CR |
230 | /* Displayed after reading a command but before executing it in an interactive shell */ |
231 | char *ps0_prompt; | |
232 | ||
726f6388 JA |
233 | /* Handle on the current prompt string. Indirectly points through |
234 | ps1_ or ps2_prompt. */ | |
235 | char **prompt_string_pointer = (char **)NULL; | |
236 | char *current_prompt_string; | |
237 | ||
ccc6cda3 JA |
238 | /* Non-zero means we expand aliases in commands. */ |
239 | int expand_aliases = 0; | |
240 | ||
241 | /* If non-zero, the decoded prompt string undergoes parameter and | |
242 | variable substitution, command substitution, arithmetic substitution, | |
243 | string expansion, process substitution, and quote removal in | |
244 | decode_prompt_string. */ | |
245 | int promptvars = 1; | |
246 | ||
b80f6443 JA |
247 | /* If non-zero, $'...' and $"..." are expanded when they appear within |
248 | a ${...} expansion, even when the expansion appears within double | |
249 | quotes. */ | |
250 | int extended_quote = 1; | |
251 | ||
726f6388 | 252 | /* The number of lines read from input while creating the current command. */ |
ccc6cda3 | 253 | int current_command_line_count; |
726f6388 | 254 | |
495aee44 CR |
255 | /* The number of lines in a command saved while we run parse_and_execute */ |
256 | int saved_command_line_count; | |
257 | ||
3185942a JA |
258 | /* The token that currently denotes the end of parse. */ |
259 | int shell_eof_token; | |
260 | ||
261 | /* The token currently being read. */ | |
262 | int current_token; | |
263 | ||
0001803f CR |
264 | /* The current parser state. */ |
265 | int parser_state; | |
266 | ||
726f6388 JA |
267 | /* Variables to manage the task of reading here documents, because we need to |
268 | defer the reading until after a complete command has been collected. */ | |
90a39f32 | 269 | static REDIRECT *redir_stack[HEREDOC_MAX]; |
ccc6cda3 | 270 | int need_here_doc; |
726f6388 JA |
271 | |
272 | /* Where shell input comes from. History expansion is performed on each | |
273 | line when the shell is interactive. */ | |
274 | static char *shell_input_line = (char *)NULL; | |
ac50fbac CR |
275 | static size_t shell_input_line_index; |
276 | static size_t shell_input_line_size; /* Amount allocated for shell_input_line. */ | |
277 | static size_t shell_input_line_len; /* strlen (shell_input_line) */ | |
726f6388 JA |
278 | |
279 | /* Either zero or EOF. */ | |
ccc6cda3 JA |
280 | static int shell_input_line_terminator; |
281 | ||
282 | /* The line number in a script on which a function definition starts. */ | |
283 | static int function_dstart; | |
284 | ||
285 | /* The line number in a script on which a function body starts. */ | |
286 | static int function_bstart; | |
726f6388 | 287 | |
bb70624e JA |
288 | /* The line number in a script at which an arithmetic for command starts. */ |
289 | static int arith_for_lineno; | |
290 | ||
0001803f CR |
291 | /* The decoded prompt string. Used if READLINE is not defined or if |
292 | editing is turned off. Analogous to current_readline_prompt. */ | |
293 | static char *current_decoded_prompt; | |
3185942a JA |
294 | |
295 | /* The last read token, or NULL. read_token () uses this for context | |
296 | checking. */ | |
297 | static int last_read_token; | |
298 | ||
299 | /* The token read prior to last_read_token. */ | |
300 | static int token_before_that; | |
301 | ||
302 | /* The token read prior to token_before_that. */ | |
303 | static int two_tokens_ago; | |
304 | ||
0001803f CR |
305 | static int global_extglob; |
306 | ||
b80f6443 JA |
307 | /* The line number in a script where the word in a `case WORD', `select WORD' |
308 | or `for WORD' begins. This is a nested command maximum, since the array | |
309 | index is decremented after a case, select, or for command is parsed. */ | |
310 | #define MAX_CASE_NEST 128 | |
90a39f32 | 311 | static int word_lineno[MAX_CASE_NEST+1]; |
b80f6443 JA |
312 | static int word_top = -1; |
313 | ||
314 | /* If non-zero, it is the token that we want read_token to return | |
315 | regardless of what text is (or isn't) present to be read. This | |
316 | is reset by read_token. If token_to_read == WORD or | |
317 | ASSIGNMENT_WORD, yylval.word should be set to word_desc_to_read. */ | |
318 | static int token_to_read; | |
319 | static WORD_DESC *word_desc_to_read; | |
320 | ||
0001803f | 321 | static REDIRECTEE source; |
726f6388 | 322 | static REDIRECTEE redir; |
d233b485 CR |
323 | |
324 | static FILE *yyoutstream; | |
325 | static FILE *yyerrstream; | |
726f6388 JA |
326 | %} |
327 | ||
328 | %union { | |
329 | WORD_DESC *word; /* the word that we read. */ | |
330 | int number; /* the number that we read. */ | |
331 | WORD_LIST *word_list; | |
332 | COMMAND *command; | |
333 | REDIRECT *redirect; | |
334 | ELEMENT element; | |
335 | PATTERN_LIST *pattern; | |
336 | } | |
337 | ||
338 | /* Reserved words. Members of the first group are only recognized | |
339 | in the case that they are preceded by a list_terminator. Members | |
cce855bc JA |
340 | of the second group are for [[...]] commands. Members of the |
341 | third group are recognized only under special circumstances. */ | |
3185942a | 342 | %token IF THEN ELSE ELIF FI CASE ESAC FOR SELECT WHILE UNTIL DO DONE FUNCTION COPROC |
cce855bc | 343 | %token COND_START COND_END COND_ERROR |
495aee44 | 344 | %token IN BANG TIME TIMEOPT TIMEIGN |
726f6388 JA |
345 | |
346 | /* More general tokens. yylex () knows how to make these. */ | |
0001803f | 347 | %token <word> WORD ASSIGNMENT_WORD REDIR_WORD |
726f6388 | 348 | %token <number> NUMBER |
bb70624e | 349 | %token <word_list> ARITH_CMD ARITH_FOR_EXPRS |
cce855bc | 350 | %token <command> COND_CMD |
7117c2d2 | 351 | %token AND_AND OR_OR GREATER_GREATER LESS_LESS LESS_AND LESS_LESS_LESS |
3185942a JA |
352 | %token GREATER_AND SEMI_SEMI SEMI_AND SEMI_SEMI_AND |
353 | %token LESS_LESS_MINUS AND_GREATER AND_GREATER_GREATER LESS_GREATER | |
354 | %token GREATER_BAR BAR_AND | |
726f6388 JA |
355 | |
356 | /* The types that the various syntactical units return. */ | |
357 | ||
ccc6cda3 JA |
358 | %type <command> inputunit command pipeline pipeline_command |
359 | %type <command> list list0 list1 compound_list simple_list simple_list1 | |
360 | %type <command> simple_command shell_command | |
361 | %type <command> for_command select_command case_command group_command | |
cce855bc JA |
362 | %type <command> arith_command |
363 | %type <command> cond_command | |
bb70624e | 364 | %type <command> arith_for_command |
3185942a | 365 | %type <command> coproc |
28ef6c31 | 366 | %type <command> function_def function_body if_command elif_clause subshell |
ccc6cda3 | 367 | %type <redirect> redirection redirection_list |
726f6388 | 368 | %type <element> simple_command_element |
ccc6cda3 JA |
369 | %type <word_list> word_list pattern |
370 | %type <pattern> pattern_list case_clause_sequence case_clause | |
371 | %type <number> timespec | |
b80f6443 | 372 | %type <number> list_terminator |
726f6388 JA |
373 | |
374 | %start inputunit | |
375 | ||
376 | %left '&' ';' '\n' yacc_EOF | |
377 | %left AND_AND OR_OR | |
3185942a | 378 | %right '|' BAR_AND |
726f6388 JA |
379 | %% |
380 | ||
7117c2d2 | 381 | inputunit: simple_list simple_list_terminator |
726f6388 JA |
382 | { |
383 | /* Case of regular command. Discard the error | |
384 | safety net,and return the command just parsed. */ | |
385 | global_command = $1; | |
386 | eof_encountered = 0; | |
7117c2d2 | 387 | /* discard_parser_constructs (0); */ |
3185942a JA |
388 | if (parser_state & PST_CMDSUBST) |
389 | parser_state |= PST_EOFTOKEN; | |
726f6388 JA |
390 | YYACCEPT; |
391 | } | |
392 | | '\n' | |
393 | { | |
394 | /* Case of regular command, but not a very | |
395 | interesting one. Return a NULL command. */ | |
396 | global_command = (COMMAND *)NULL; | |
3185942a JA |
397 | if (parser_state & PST_CMDSUBST) |
398 | parser_state |= PST_EOFTOKEN; | |
726f6388 JA |
399 | YYACCEPT; |
400 | } | |
ccc6cda3 | 401 | | error '\n' |
726f6388 JA |
402 | { |
403 | /* Error during parsing. Return NULL command. */ | |
404 | global_command = (COMMAND *)NULL; | |
405 | eof_encountered = 0; | |
7117c2d2 | 406 | /* discard_parser_constructs (1); */ |
3185942a | 407 | if (interactive && parse_and_execute_level == 0) |
726f6388 JA |
408 | { |
409 | YYACCEPT; | |
410 | } | |
411 | else | |
412 | { | |
413 | YYABORT; | |
414 | } | |
415 | } | |
d233b485 CR |
416 | | error yacc_EOF |
417 | { | |
418 | /* EOF after an error. Do ignoreeof or not. Really | |
419 | only interesting in non-interactive shells */ | |
420 | global_command = (COMMAND *)NULL; | |
421 | if (last_command_exit_value == 0) | |
422 | last_command_exit_value = EX_BADUSAGE; /* force error return */ | |
423 | handle_eof_input_unit (); | |
424 | if (interactive && parse_and_execute_level == 0) | |
425 | { | |
426 | YYACCEPT; | |
427 | } | |
428 | else | |
429 | { | |
430 | YYABORT; | |
431 | } | |
432 | } | |
726f6388 JA |
433 | | yacc_EOF |
434 | { | |
ccc6cda3 | 435 | /* Case of EOF seen by itself. Do ignoreeof or |
726f6388 JA |
436 | not. */ |
437 | global_command = (COMMAND *)NULL; | |
438 | handle_eof_input_unit (); | |
439 | YYACCEPT; | |
440 | } | |
441 | ; | |
442 | ||
ccc6cda3 JA |
443 | word_list: WORD |
444 | { $$ = make_word_list ($1, (WORD_LIST *)NULL); } | |
445 | | word_list WORD | |
726f6388 JA |
446 | { $$ = make_word_list ($2, $1); } |
447 | ; | |
448 | ||
449 | redirection: '>' WORD | |
450 | { | |
0001803f | 451 | source.dest = 1; |
726f6388 | 452 | redir.filename = $2; |
0001803f | 453 | $$ = make_redirection (source, r_output_direction, redir, 0); |
726f6388 JA |
454 | } |
455 | | '<' WORD | |
456 | { | |
0001803f | 457 | source.dest = 0; |
726f6388 | 458 | redir.filename = $2; |
0001803f | 459 | $$ = make_redirection (source, r_input_direction, redir, 0); |
726f6388 JA |
460 | } |
461 | | NUMBER '>' WORD | |
462 | { | |
0001803f | 463 | source.dest = $1; |
726f6388 | 464 | redir.filename = $3; |
0001803f | 465 | $$ = make_redirection (source, r_output_direction, redir, 0); |
726f6388 JA |
466 | } |
467 | | NUMBER '<' WORD | |
468 | { | |
0001803f CR |
469 | source.dest = $1; |
470 | redir.filename = $3; | |
471 | $$ = make_redirection (source, r_input_direction, redir, 0); | |
472 | } | |
473 | | REDIR_WORD '>' WORD | |
474 | { | |
475 | source.filename = $1; | |
726f6388 | 476 | redir.filename = $3; |
0001803f CR |
477 | $$ = make_redirection (source, r_output_direction, redir, REDIR_VARASSIGN); |
478 | } | |
479 | | REDIR_WORD '<' WORD | |
480 | { | |
481 | source.filename = $1; | |
482 | redir.filename = $3; | |
483 | $$ = make_redirection (source, r_input_direction, redir, REDIR_VARASSIGN); | |
726f6388 JA |
484 | } |
485 | | GREATER_GREATER WORD | |
486 | { | |
0001803f | 487 | source.dest = 1; |
726f6388 | 488 | redir.filename = $2; |
0001803f | 489 | $$ = make_redirection (source, r_appending_to, redir, 0); |
726f6388 JA |
490 | } |
491 | | NUMBER GREATER_GREATER WORD | |
492 | { | |
0001803f CR |
493 | source.dest = $1; |
494 | redir.filename = $3; | |
495 | $$ = make_redirection (source, r_appending_to, redir, 0); | |
496 | } | |
497 | | REDIR_WORD GREATER_GREATER WORD | |
498 | { | |
499 | source.filename = $1; | |
500 | redir.filename = $3; | |
501 | $$ = make_redirection (source, r_appending_to, redir, REDIR_VARASSIGN); | |
502 | } | |
503 | | GREATER_BAR WORD | |
504 | { | |
505 | source.dest = 1; | |
506 | redir.filename = $2; | |
507 | $$ = make_redirection (source, r_output_force, redir, 0); | |
508 | } | |
509 | | NUMBER GREATER_BAR WORD | |
510 | { | |
511 | source.dest = $1; | |
512 | redir.filename = $3; | |
513 | $$ = make_redirection (source, r_output_force, redir, 0); | |
514 | } | |
515 | | REDIR_WORD GREATER_BAR WORD | |
516 | { | |
517 | source.filename = $1; | |
518 | redir.filename = $3; | |
519 | $$ = make_redirection (source, r_output_force, redir, REDIR_VARASSIGN); | |
520 | } | |
521 | | LESS_GREATER WORD | |
522 | { | |
523 | source.dest = 0; | |
524 | redir.filename = $2; | |
525 | $$ = make_redirection (source, r_input_output, redir, 0); | |
526 | } | |
527 | | NUMBER LESS_GREATER WORD | |
528 | { | |
529 | source.dest = $1; | |
726f6388 | 530 | redir.filename = $3; |
0001803f CR |
531 | $$ = make_redirection (source, r_input_output, redir, 0); |
532 | } | |
533 | | REDIR_WORD LESS_GREATER WORD | |
534 | { | |
535 | source.filename = $1; | |
536 | redir.filename = $3; | |
537 | $$ = make_redirection (source, r_input_output, redir, REDIR_VARASSIGN); | |
726f6388 JA |
538 | } |
539 | | LESS_LESS WORD | |
540 | { | |
0001803f | 541 | source.dest = 0; |
726f6388 | 542 | redir.filename = $2; |
0001803f | 543 | $$ = make_redirection (source, r_reading_until, redir, 0); |
90a39f32 | 544 | push_heredoc ($$); |
726f6388 JA |
545 | } |
546 | | NUMBER LESS_LESS WORD | |
547 | { | |
0001803f CR |
548 | source.dest = $1; |
549 | redir.filename = $3; | |
550 | $$ = make_redirection (source, r_reading_until, redir, 0); | |
90a39f32 | 551 | push_heredoc ($$); |
0001803f CR |
552 | } |
553 | | REDIR_WORD LESS_LESS WORD | |
554 | { | |
555 | source.filename = $1; | |
726f6388 | 556 | redir.filename = $3; |
0001803f | 557 | $$ = make_redirection (source, r_reading_until, redir, REDIR_VARASSIGN); |
90a39f32 | 558 | push_heredoc ($$); |
0001803f CR |
559 | } |
560 | | LESS_LESS_MINUS WORD | |
561 | { | |
562 | source.dest = 0; | |
563 | redir.filename = $2; | |
564 | $$ = make_redirection (source, r_deblank_reading_until, redir, 0); | |
90a39f32 | 565 | push_heredoc ($$); |
0001803f CR |
566 | } |
567 | | NUMBER LESS_LESS_MINUS WORD | |
568 | { | |
569 | source.dest = $1; | |
570 | redir.filename = $3; | |
571 | $$ = make_redirection (source, r_deblank_reading_until, redir, 0); | |
90a39f32 | 572 | push_heredoc ($$); |
0001803f CR |
573 | } |
574 | | REDIR_WORD LESS_LESS_MINUS WORD | |
575 | { | |
576 | source.filename = $1; | |
577 | redir.filename = $3; | |
578 | $$ = make_redirection (source, r_deblank_reading_until, redir, REDIR_VARASSIGN); | |
90a39f32 | 579 | push_heredoc ($$); |
726f6388 | 580 | } |
7117c2d2 JA |
581 | | LESS_LESS_LESS WORD |
582 | { | |
0001803f | 583 | source.dest = 0; |
7117c2d2 | 584 | redir.filename = $2; |
0001803f | 585 | $$ = make_redirection (source, r_reading_string, redir, 0); |
7117c2d2 JA |
586 | } |
587 | | NUMBER LESS_LESS_LESS WORD | |
588 | { | |
0001803f | 589 | source.dest = $1; |
7117c2d2 | 590 | redir.filename = $3; |
0001803f CR |
591 | $$ = make_redirection (source, r_reading_string, redir, 0); |
592 | } | |
593 | | REDIR_WORD LESS_LESS_LESS WORD | |
594 | { | |
595 | source.filename = $1; | |
596 | redir.filename = $3; | |
597 | $$ = make_redirection (source, r_reading_string, redir, REDIR_VARASSIGN); | |
7117c2d2 | 598 | } |
726f6388 JA |
599 | | LESS_AND NUMBER |
600 | { | |
0001803f | 601 | source.dest = 0; |
726f6388 | 602 | redir.dest = $2; |
0001803f | 603 | $$ = make_redirection (source, r_duplicating_input, redir, 0); |
726f6388 JA |
604 | } |
605 | | NUMBER LESS_AND NUMBER | |
606 | { | |
0001803f CR |
607 | source.dest = $1; |
608 | redir.dest = $3; | |
609 | $$ = make_redirection (source, r_duplicating_input, redir, 0); | |
610 | } | |
611 | | REDIR_WORD LESS_AND NUMBER | |
612 | { | |
613 | source.filename = $1; | |
726f6388 | 614 | redir.dest = $3; |
0001803f | 615 | $$ = make_redirection (source, r_duplicating_input, redir, REDIR_VARASSIGN); |
726f6388 JA |
616 | } |
617 | | GREATER_AND NUMBER | |
618 | { | |
0001803f | 619 | source.dest = 1; |
726f6388 | 620 | redir.dest = $2; |
0001803f | 621 | $$ = make_redirection (source, r_duplicating_output, redir, 0); |
726f6388 JA |
622 | } |
623 | | NUMBER GREATER_AND NUMBER | |
624 | { | |
0001803f | 625 | source.dest = $1; |
726f6388 | 626 | redir.dest = $3; |
0001803f CR |
627 | $$ = make_redirection (source, r_duplicating_output, redir, 0); |
628 | } | |
629 | | REDIR_WORD GREATER_AND NUMBER | |
630 | { | |
631 | source.filename = $1; | |
632 | redir.dest = $3; | |
633 | $$ = make_redirection (source, r_duplicating_output, redir, REDIR_VARASSIGN); | |
726f6388 JA |
634 | } |
635 | | LESS_AND WORD | |
636 | { | |
0001803f | 637 | source.dest = 0; |
726f6388 | 638 | redir.filename = $2; |
0001803f | 639 | $$ = make_redirection (source, r_duplicating_input_word, redir, 0); |
726f6388 JA |
640 | } |
641 | | NUMBER LESS_AND WORD | |
642 | { | |
0001803f CR |
643 | source.dest = $1; |
644 | redir.filename = $3; | |
645 | $$ = make_redirection (source, r_duplicating_input_word, redir, 0); | |
646 | } | |
647 | | REDIR_WORD LESS_AND WORD | |
648 | { | |
649 | source.filename = $1; | |
726f6388 | 650 | redir.filename = $3; |
0001803f | 651 | $$ = make_redirection (source, r_duplicating_input_word, redir, REDIR_VARASSIGN); |
726f6388 JA |
652 | } |
653 | | GREATER_AND WORD | |
654 | { | |
0001803f | 655 | source.dest = 1; |
726f6388 | 656 | redir.filename = $2; |
0001803f | 657 | $$ = make_redirection (source, r_duplicating_output_word, redir, 0); |
726f6388 JA |
658 | } |
659 | | NUMBER GREATER_AND WORD | |
660 | { | |
0001803f | 661 | source.dest = $1; |
726f6388 | 662 | redir.filename = $3; |
0001803f | 663 | $$ = make_redirection (source, r_duplicating_output_word, redir, 0); |
726f6388 | 664 | } |
0001803f | 665 | | REDIR_WORD GREATER_AND WORD |
726f6388 | 666 | { |
0001803f | 667 | source.filename = $1; |
726f6388 | 668 | redir.filename = $3; |
0001803f | 669 | $$ = make_redirection (source, r_duplicating_output_word, redir, REDIR_VARASSIGN); |
726f6388 JA |
670 | } |
671 | | GREATER_AND '-' | |
672 | { | |
0001803f | 673 | source.dest = 1; |
f73dda09 | 674 | redir.dest = 0; |
0001803f | 675 | $$ = make_redirection (source, r_close_this, redir, 0); |
726f6388 JA |
676 | } |
677 | | NUMBER GREATER_AND '-' | |
678 | { | |
0001803f | 679 | source.dest = $1; |
f73dda09 | 680 | redir.dest = 0; |
0001803f | 681 | $$ = make_redirection (source, r_close_this, redir, 0); |
726f6388 | 682 | } |
0001803f | 683 | | REDIR_WORD GREATER_AND '-' |
726f6388 | 684 | { |
0001803f | 685 | source.filename = $1; |
f73dda09 | 686 | redir.dest = 0; |
0001803f | 687 | $$ = make_redirection (source, r_close_this, redir, REDIR_VARASSIGN); |
726f6388 | 688 | } |
0001803f | 689 | | LESS_AND '-' |
726f6388 | 690 | { |
0001803f | 691 | source.dest = 0; |
f73dda09 | 692 | redir.dest = 0; |
0001803f | 693 | $$ = make_redirection (source, r_close_this, redir, 0); |
726f6388 | 694 | } |
0001803f | 695 | | NUMBER LESS_AND '-' |
3185942a | 696 | { |
0001803f CR |
697 | source.dest = $1; |
698 | redir.dest = 0; | |
699 | $$ = make_redirection (source, r_close_this, redir, 0); | |
3185942a | 700 | } |
0001803f | 701 | | REDIR_WORD LESS_AND '-' |
726f6388 | 702 | { |
0001803f CR |
703 | source.filename = $1; |
704 | redir.dest = 0; | |
705 | $$ = make_redirection (source, r_close_this, redir, REDIR_VARASSIGN); | |
726f6388 | 706 | } |
0001803f | 707 | | AND_GREATER WORD |
726f6388 | 708 | { |
0001803f | 709 | source.dest = 1; |
726f6388 | 710 | redir.filename = $2; |
0001803f | 711 | $$ = make_redirection (source, r_err_and_out, redir, 0); |
ccc6cda3 | 712 | } |
0001803f | 713 | | AND_GREATER_GREATER WORD |
726f6388 | 714 | { |
0001803f | 715 | source.dest = 1; |
726f6388 | 716 | redir.filename = $2; |
0001803f | 717 | $$ = make_redirection (source, r_append_err_and_out, redir, 0); |
726f6388 JA |
718 | } |
719 | ; | |
720 | ||
721 | simple_command_element: WORD | |
722 | { $$.word = $1; $$.redirect = 0; } | |
723 | | ASSIGNMENT_WORD | |
724 | { $$.word = $1; $$.redirect = 0; } | |
725 | | redirection | |
726 | { $$.redirect = $1; $$.word = 0; } | |
727 | ; | |
728 | ||
ccc6cda3 | 729 | redirection_list: redirection |
726f6388 JA |
730 | { |
731 | $$ = $1; | |
732 | } | |
ccc6cda3 JA |
733 | | redirection_list redirection |
734 | { | |
735 | register REDIRECT *t; | |
726f6388 | 736 | |
ccc6cda3 JA |
737 | for (t = $1; t->next; t = t->next) |
738 | ; | |
739 | t->next = $2; | |
726f6388 JA |
740 | $$ = $1; |
741 | } | |
742 | ; | |
743 | ||
744 | simple_command: simple_command_element | |
745 | { $$ = make_simple_command ($1, (COMMAND *)NULL); } | |
746 | | simple_command simple_command_element | |
747 | { $$ = make_simple_command ($2, $1); } | |
748 | ; | |
749 | ||
750 | command: simple_command | |
751 | { $$ = clean_simple_command ($1); } | |
752 | | shell_command | |
753 | { $$ = $1; } | |
ccc6cda3 | 754 | | shell_command redirection_list |
726f6388 | 755 | { |
ccc6cda3 JA |
756 | COMMAND *tc; |
757 | ||
758 | tc = $1; | |
d233b485 | 759 | if (tc && tc->redirects) |
726f6388 JA |
760 | { |
761 | register REDIRECT *t; | |
ccc6cda3 | 762 | for (t = tc->redirects; t->next; t = t->next) |
726f6388 JA |
763 | ; |
764 | t->next = $2; | |
765 | } | |
d233b485 | 766 | else if (tc) |
ccc6cda3 | 767 | tc->redirects = $2; |
726f6388 JA |
768 | $$ = $1; |
769 | } | |
28ef6c31 JA |
770 | | function_def |
771 | { $$ = $1; } | |
3185942a JA |
772 | | coproc |
773 | { $$ = $1; } | |
726f6388 JA |
774 | ; |
775 | ||
ccc6cda3 JA |
776 | shell_command: for_command |
777 | { $$ = $1; } | |
778 | | case_command | |
779 | { $$ = $1; } | |
780 | | WHILE compound_list DO compound_list DONE | |
726f6388 | 781 | { $$ = make_while_command ($2, $4); } |
ccc6cda3 | 782 | | UNTIL compound_list DO compound_list DONE |
726f6388 JA |
783 | { $$ = make_until_command ($2, $4); } |
784 | | select_command | |
785 | { $$ = $1; } | |
786 | | if_command | |
787 | { $$ = $1; } | |
788 | | subshell | |
789 | { $$ = $1; } | |
790 | | group_command | |
791 | { $$ = $1; } | |
cce855bc JA |
792 | | arith_command |
793 | { $$ = $1; } | |
794 | | cond_command | |
795 | { $$ = $1; } | |
bb70624e JA |
796 | | arith_for_command |
797 | { $$ = $1; } | |
726f6388 JA |
798 | ; |
799 | ||
d166f048 | 800 | for_command: FOR WORD newline_list DO compound_list DONE |
b80f6443 JA |
801 | { |
802 | $$ = make_for_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $5, word_lineno[word_top]); | |
803 | if (word_top > 0) word_top--; | |
804 | } | |
d166f048 | 805 | | FOR WORD newline_list '{' compound_list '}' |
b80f6443 JA |
806 | { |
807 | $$ = make_for_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $5, word_lineno[word_top]); | |
808 | if (word_top > 0) word_top--; | |
809 | } | |
d166f048 | 810 | | FOR WORD ';' newline_list DO compound_list DONE |
b80f6443 JA |
811 | { |
812 | $$ = make_for_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $6, word_lineno[word_top]); | |
813 | if (word_top > 0) word_top--; | |
814 | } | |
d166f048 | 815 | | FOR WORD ';' newline_list '{' compound_list '}' |
b80f6443 JA |
816 | { |
817 | $$ = make_for_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $6, word_lineno[word_top]); | |
818 | if (word_top > 0) word_top--; | |
819 | } | |
d166f048 | 820 | | FOR WORD newline_list IN word_list list_terminator newline_list DO compound_list DONE |
b80f6443 JA |
821 | { |
822 | $$ = make_for_command ($2, REVERSE_LIST ($5, WORD_LIST *), $9, word_lineno[word_top]); | |
823 | if (word_top > 0) word_top--; | |
824 | } | |
d166f048 | 825 | | FOR WORD newline_list IN word_list list_terminator newline_list '{' compound_list '}' |
b80f6443 JA |
826 | { |
827 | $$ = make_for_command ($2, REVERSE_LIST ($5, WORD_LIST *), $9, word_lineno[word_top]); | |
828 | if (word_top > 0) word_top--; | |
829 | } | |
f73dda09 | 830 | | FOR WORD newline_list IN list_terminator newline_list DO compound_list DONE |
b80f6443 JA |
831 | { |
832 | $$ = make_for_command ($2, (WORD_LIST *)NULL, $8, word_lineno[word_top]); | |
833 | if (word_top > 0) word_top--; | |
834 | } | |
f73dda09 | 835 | | FOR WORD newline_list IN list_terminator newline_list '{' compound_list '}' |
b80f6443 JA |
836 | { |
837 | $$ = make_for_command ($2, (WORD_LIST *)NULL, $8, word_lineno[word_top]); | |
838 | if (word_top > 0) word_top--; | |
839 | } | |
ccc6cda3 JA |
840 | ; |
841 | ||
bb70624e | 842 | arith_for_command: FOR ARITH_FOR_EXPRS list_terminator newline_list DO compound_list DONE |
b80f6443 JA |
843 | { |
844 | $$ = make_arith_for_command ($2, $6, arith_for_lineno); | |
d233b485 | 845 | if ($$ == 0) YYERROR; |
b80f6443 JA |
846 | if (word_top > 0) word_top--; |
847 | } | |
bb70624e | 848 | | FOR ARITH_FOR_EXPRS list_terminator newline_list '{' compound_list '}' |
b80f6443 JA |
849 | { |
850 | $$ = make_arith_for_command ($2, $6, arith_for_lineno); | |
d233b485 | 851 | if ($$ == 0) YYERROR; |
b80f6443 JA |
852 | if (word_top > 0) word_top--; |
853 | } | |
28ef6c31 | 854 | | FOR ARITH_FOR_EXPRS DO compound_list DONE |
b80f6443 JA |
855 | { |
856 | $$ = make_arith_for_command ($2, $4, arith_for_lineno); | |
d233b485 | 857 | if ($$ == 0) YYERROR; |
b80f6443 JA |
858 | if (word_top > 0) word_top--; |
859 | } | |
28ef6c31 | 860 | | FOR ARITH_FOR_EXPRS '{' compound_list '}' |
b80f6443 JA |
861 | { |
862 | $$ = make_arith_for_command ($2, $4, arith_for_lineno); | |
d233b485 | 863 | if ($$ == 0) YYERROR; |
b80f6443 JA |
864 | if (word_top > 0) word_top--; |
865 | } | |
bb70624e | 866 | ; |
28ef6c31 | 867 | |
ccc6cda3 | 868 | select_command: SELECT WORD newline_list DO list DONE |
726f6388 | 869 | { |
b80f6443 JA |
870 | $$ = make_select_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $5, word_lineno[word_top]); |
871 | if (word_top > 0) word_top--; | |
726f6388 | 872 | } |
ccc6cda3 | 873 | | SELECT WORD newline_list '{' list '}' |
726f6388 | 874 | { |
b80f6443 JA |
875 | $$ = make_select_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $5, word_lineno[word_top]); |
876 | if (word_top > 0) word_top--; | |
726f6388 | 877 | } |
ccc6cda3 | 878 | | SELECT WORD ';' newline_list DO list DONE |
726f6388 | 879 | { |
b80f6443 JA |
880 | $$ = make_select_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $6, word_lineno[word_top]); |
881 | if (word_top > 0) word_top--; | |
726f6388 | 882 | } |
ccc6cda3 | 883 | | SELECT WORD ';' newline_list '{' list '}' |
726f6388 | 884 | { |
b80f6443 JA |
885 | $$ = make_select_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $6, word_lineno[word_top]); |
886 | if (word_top > 0) word_top--; | |
726f6388 | 887 | } |
ccc6cda3 | 888 | | SELECT WORD newline_list IN word_list list_terminator newline_list DO list DONE |
726f6388 | 889 | { |
b80f6443 JA |
890 | $$ = make_select_command ($2, REVERSE_LIST ($5, WORD_LIST *), $9, word_lineno[word_top]); |
891 | if (word_top > 0) word_top--; | |
726f6388 | 892 | } |
ccc6cda3 | 893 | | SELECT WORD newline_list IN word_list list_terminator newline_list '{' list '}' |
726f6388 | 894 | { |
b80f6443 JA |
895 | $$ = make_select_command ($2, REVERSE_LIST ($5, WORD_LIST *), $9, word_lineno[word_top]); |
896 | if (word_top > 0) word_top--; | |
726f6388 | 897 | } |
d233b485 CR |
898 | | SELECT WORD newline_list IN list_terminator newline_list DO compound_list DONE |
899 | { | |
900 | $$ = make_select_command ($2, (WORD_LIST *)NULL, $8, word_lineno[word_top]); | |
901 | if (word_top > 0) word_top--; | |
902 | } | |
903 | | SELECT WORD newline_list IN list_terminator newline_list '{' compound_list '}' | |
904 | { | |
905 | $$ = make_select_command ($2, (WORD_LIST *)NULL, $8, word_lineno[word_top]); | |
906 | if (word_top > 0) word_top--; | |
907 | } | |
726f6388 JA |
908 | ; |
909 | ||
ccc6cda3 | 910 | case_command: CASE WORD newline_list IN newline_list ESAC |
b80f6443 JA |
911 | { |
912 | $$ = make_case_command ($2, (PATTERN_LIST *)NULL, word_lineno[word_top]); | |
913 | if (word_top > 0) word_top--; | |
914 | } | |
ccc6cda3 | 915 | | CASE WORD newline_list IN case_clause_sequence newline_list ESAC |
b80f6443 JA |
916 | { |
917 | $$ = make_case_command ($2, $5, word_lineno[word_top]); | |
918 | if (word_top > 0) word_top--; | |
919 | } | |
ccc6cda3 | 920 | | CASE WORD newline_list IN case_clause ESAC |
b80f6443 JA |
921 | { |
922 | $$ = make_case_command ($2, $5, word_lineno[word_top]); | |
923 | if (word_top > 0) word_top--; | |
924 | } | |
ccc6cda3 | 925 | ; |
726f6388 | 926 | |
28ef6c31 | 927 | function_def: WORD '(' ')' newline_list function_body |
ccc6cda3 | 928 | { $$ = make_function_def ($1, $5, function_dstart, function_bstart); } |
726f6388 | 929 | |
28ef6c31 | 930 | | FUNCTION WORD '(' ')' newline_list function_body |
ccc6cda3 | 931 | { $$ = make_function_def ($2, $6, function_dstart, function_bstart); } |
726f6388 | 932 | |
28ef6c31 | 933 | | FUNCTION WORD newline_list function_body |
ccc6cda3 | 934 | { $$ = make_function_def ($2, $4, function_dstart, function_bstart); } |
726f6388 JA |
935 | ; |
936 | ||
28ef6c31 JA |
937 | function_body: shell_command |
938 | { $$ = $1; } | |
939 | | shell_command redirection_list | |
940 | { | |
941 | COMMAND *tc; | |
942 | ||
943 | tc = $1; | |
944 | /* According to Posix.2 3.9.5, redirections | |
945 | specified after the body of a function should | |
946 | be attached to the function and performed when | |
947 | the function is executed, not as part of the | |
948 | function definition command. */ | |
949 | /* XXX - I don't think it matters, but we might | |
950 | want to change this in the future to avoid | |
951 | problems differentiating between a function | |
952 | definition with a redirection and a function | |
953 | definition containing a single command with a | |
954 | redirection. The two are semantically equivalent, | |
955 | though -- the only difference is in how the | |
956 | command printing code displays the redirections. */ | |
d233b485 | 957 | if (tc && tc->redirects) |
28ef6c31 JA |
958 | { |
959 | register REDIRECT *t; | |
960 | for (t = tc->redirects; t->next; t = t->next) | |
961 | ; | |
962 | t->next = $2; | |
963 | } | |
d233b485 | 964 | else if (tc) |
28ef6c31 JA |
965 | tc->redirects = $2; |
966 | $$ = $1; | |
967 | } | |
968 | ; | |
969 | ||
ccc6cda3 | 970 | subshell: '(' compound_list ')' |
bb70624e JA |
971 | { |
972 | $$ = make_subshell_command ($2); | |
973 | $$->flags |= CMD_WANT_SUBSHELL; | |
974 | } | |
726f6388 | 975 | ; |
ccc6cda3 | 976 | |
3185942a JA |
977 | coproc: COPROC shell_command |
978 | { | |
979 | $$ = make_coproc_command ("COPROC", $2); | |
980 | $$->flags |= CMD_WANT_SUBSHELL|CMD_COPROC_SUBSHELL; | |
981 | } | |
982 | | COPROC shell_command redirection_list | |
983 | { | |
984 | COMMAND *tc; | |
985 | ||
986 | tc = $2; | |
d233b485 | 987 | if (tc && tc->redirects) |
3185942a JA |
988 | { |
989 | register REDIRECT *t; | |
990 | for (t = tc->redirects; t->next; t = t->next) | |
991 | ; | |
992 | t->next = $3; | |
993 | } | |
d233b485 | 994 | else if (tc) |
3185942a JA |
995 | tc->redirects = $3; |
996 | $$ = make_coproc_command ("COPROC", $2); | |
997 | $$->flags |= CMD_WANT_SUBSHELL|CMD_COPROC_SUBSHELL; | |
998 | } | |
999 | | COPROC WORD shell_command | |
1000 | { | |
1001 | $$ = make_coproc_command ($2->word, $3); | |
1002 | $$->flags |= CMD_WANT_SUBSHELL|CMD_COPROC_SUBSHELL; | |
1003 | } | |
1004 | | COPROC WORD shell_command redirection_list | |
1005 | { | |
1006 | COMMAND *tc; | |
1007 | ||
1008 | tc = $3; | |
d233b485 | 1009 | if (tc && tc->redirects) |
3185942a JA |
1010 | { |
1011 | register REDIRECT *t; | |
1012 | for (t = tc->redirects; t->next; t = t->next) | |
1013 | ; | |
1014 | t->next = $4; | |
1015 | } | |
d233b485 | 1016 | else if (tc) |
3185942a JA |
1017 | tc->redirects = $4; |
1018 | $$ = make_coproc_command ($2->word, $3); | |
1019 | $$->flags |= CMD_WANT_SUBSHELL|CMD_COPROC_SUBSHELL; | |
1020 | } | |
1021 | | COPROC simple_command | |
1022 | { | |
1023 | $$ = make_coproc_command ("COPROC", clean_simple_command ($2)); | |
1024 | $$->flags |= CMD_WANT_SUBSHELL|CMD_COPROC_SUBSHELL; | |
1025 | } | |
1026 | ; | |
1027 | ||
ccc6cda3 | 1028 | if_command: IF compound_list THEN compound_list FI |
726f6388 | 1029 | { $$ = make_if_command ($2, $4, (COMMAND *)NULL); } |
ccc6cda3 | 1030 | | IF compound_list THEN compound_list ELSE compound_list FI |
726f6388 | 1031 | { $$ = make_if_command ($2, $4, $6); } |
ccc6cda3 | 1032 | | IF compound_list THEN compound_list elif_clause FI |
726f6388 JA |
1033 | { $$ = make_if_command ($2, $4, $5); } |
1034 | ; | |
1035 | ||
1036 | ||
28ef6c31 | 1037 | group_command: '{' compound_list '}' |
726f6388 JA |
1038 | { $$ = make_group_command ($2); } |
1039 | ; | |
1040 | ||
cce855bc JA |
1041 | arith_command: ARITH_CMD |
1042 | { $$ = make_arith_command ($1); } | |
1043 | ; | |
1044 | ||
1045 | cond_command: COND_START COND_CMD COND_END | |
1046 | { $$ = $2; } | |
1047 | ; | |
1048 | ||
ccc6cda3 | 1049 | elif_clause: ELIF compound_list THEN compound_list |
726f6388 | 1050 | { $$ = make_if_command ($2, $4, (COMMAND *)NULL); } |
ccc6cda3 | 1051 | | ELIF compound_list THEN compound_list ELSE compound_list |
726f6388 | 1052 | { $$ = make_if_command ($2, $4, $6); } |
ccc6cda3 | 1053 | | ELIF compound_list THEN compound_list elif_clause |
726f6388 JA |
1054 | { $$ = make_if_command ($2, $4, $5); } |
1055 | ; | |
1056 | ||
ccc6cda3 JA |
1057 | case_clause: pattern_list |
1058 | | case_clause_sequence pattern_list | |
726f6388 JA |
1059 | { $2->next = $1; $$ = $2; } |
1060 | ; | |
1061 | ||
ccc6cda3 | 1062 | pattern_list: newline_list pattern ')' compound_list |
726f6388 | 1063 | { $$ = make_pattern_list ($2, $4); } |
ccc6cda3 | 1064 | | newline_list pattern ')' newline_list |
726f6388 | 1065 | { $$ = make_pattern_list ($2, (COMMAND *)NULL); } |
ccc6cda3 | 1066 | | newline_list '(' pattern ')' compound_list |
726f6388 | 1067 | { $$ = make_pattern_list ($3, $5); } |
ccc6cda3 | 1068 | | newline_list '(' pattern ')' newline_list |
726f6388 JA |
1069 | { $$ = make_pattern_list ($3, (COMMAND *)NULL); } |
1070 | ; | |
1071 | ||
ccc6cda3 | 1072 | case_clause_sequence: pattern_list SEMI_SEMI |
3185942a | 1073 | { $$ = $1; } |
ccc6cda3 | 1074 | | case_clause_sequence pattern_list SEMI_SEMI |
726f6388 | 1075 | { $2->next = $1; $$ = $2; } |
3185942a JA |
1076 | | pattern_list SEMI_AND |
1077 | { $1->flags |= CASEPAT_FALLTHROUGH; $$ = $1; } | |
1078 | | case_clause_sequence pattern_list SEMI_AND | |
1079 | { $2->flags |= CASEPAT_FALLTHROUGH; $2->next = $1; $$ = $2; } | |
1080 | | pattern_list SEMI_SEMI_AND | |
1081 | { $1->flags |= CASEPAT_TESTNEXT; $$ = $1; } | |
1082 | | case_clause_sequence pattern_list SEMI_SEMI_AND | |
1083 | { $2->flags |= CASEPAT_TESTNEXT; $2->next = $1; $$ = $2; } | |
726f6388 JA |
1084 | ; |
1085 | ||
726f6388 JA |
1086 | pattern: WORD |
1087 | { $$ = make_word_list ($1, (WORD_LIST *)NULL); } | |
1088 | | pattern '|' WORD | |
1089 | { $$ = make_word_list ($3, $1); } | |
1090 | ; | |
1091 | ||
1092 | /* A list allows leading or trailing newlines and | |
1093 | newlines as operators (equivalent to semicolons). | |
1094 | It must end with a newline or semicolon. | |
1095 | Lists are used within commands such as if, for, while. */ | |
1096 | ||
ccc6cda3 | 1097 | list: newline_list list0 |
726f6388 JA |
1098 | { |
1099 | $$ = $2; | |
1100 | if (need_here_doc) | |
1101 | gather_here_documents (); | |
1102 | } | |
1103 | ; | |
1104 | ||
ccc6cda3 JA |
1105 | compound_list: list |
1106 | | newline_list list1 | |
1107 | { | |
1108 | $$ = $2; | |
1109 | } | |
1110 | ; | |
1111 | ||
1112 | list0: list1 '\n' newline_list | |
1113 | | list1 '&' newline_list | |
726f6388 JA |
1114 | { |
1115 | if ($1->type == cm_connection) | |
1116 | $$ = connect_async_list ($1, (COMMAND *)NULL, '&'); | |
1117 | else | |
1118 | $$ = command_connect ($1, (COMMAND *)NULL, '&'); | |
1119 | } | |
ccc6cda3 | 1120 | | list1 ';' newline_list |
726f6388 JA |
1121 | |
1122 | ; | |
1123 | ||
ccc6cda3 | 1124 | list1: list1 AND_AND newline_list list1 |
726f6388 | 1125 | { $$ = command_connect ($1, $4, AND_AND); } |
ccc6cda3 | 1126 | | list1 OR_OR newline_list list1 |
726f6388 | 1127 | { $$ = command_connect ($1, $4, OR_OR); } |
ccc6cda3 | 1128 | | list1 '&' newline_list list1 |
726f6388 JA |
1129 | { |
1130 | if ($1->type == cm_connection) | |
1131 | $$ = connect_async_list ($1, $4, '&'); | |
1132 | else | |
1133 | $$ = command_connect ($1, $4, '&'); | |
1134 | } | |
ccc6cda3 | 1135 | | list1 ';' newline_list list1 |
726f6388 | 1136 | { $$ = command_connect ($1, $4, ';'); } |
ccc6cda3 | 1137 | | list1 '\n' newline_list list1 |
726f6388 | 1138 | { $$ = command_connect ($1, $4, ';'); } |
ccc6cda3 | 1139 | | pipeline_command |
726f6388 | 1140 | { $$ = $1; } |
726f6388 JA |
1141 | ; |
1142 | ||
7117c2d2 JA |
1143 | simple_list_terminator: '\n' |
1144 | | yacc_EOF | |
1145 | ; | |
1146 | ||
726f6388 | 1147 | list_terminator:'\n' |
b80f6443 | 1148 | { $$ = '\n'; } |
726f6388 | 1149 | | ';' |
b80f6443 | 1150 | { $$ = ';'; } |
726f6388 | 1151 | | yacc_EOF |
b80f6443 | 1152 | { $$ = yacc_EOF; } |
726f6388 JA |
1153 | ; |
1154 | ||
ccc6cda3 JA |
1155 | newline_list: |
1156 | | newline_list '\n' | |
726f6388 JA |
1157 | ; |
1158 | ||
1159 | /* A simple_list is a list that contains no significant newlines | |
1160 | and no leading or trailing newlines. Newlines are allowed | |
1161 | only following operators, where they are not significant. | |
1162 | ||
1163 | This is what an inputunit consists of. */ | |
1164 | ||
1165 | simple_list: simple_list1 | |
1166 | { | |
1167 | $$ = $1; | |
1168 | if (need_here_doc) | |
1169 | gather_here_documents (); | |
3185942a JA |
1170 | if ((parser_state & PST_CMDSUBST) && current_token == shell_eof_token) |
1171 | { | |
1172 | global_command = $1; | |
1173 | eof_encountered = 0; | |
1174 | rewind_input_string (); | |
1175 | YYACCEPT; | |
1176 | } | |
726f6388 JA |
1177 | } |
1178 | | simple_list1 '&' | |
1179 | { | |
1180 | if ($1->type == cm_connection) | |
1181 | $$ = connect_async_list ($1, (COMMAND *)NULL, '&'); | |
1182 | else | |
1183 | $$ = command_connect ($1, (COMMAND *)NULL, '&'); | |
1184 | if (need_here_doc) | |
1185 | gather_here_documents (); | |
3185942a JA |
1186 | if ((parser_state & PST_CMDSUBST) && current_token == shell_eof_token) |
1187 | { | |
1188 | global_command = $1; | |
1189 | eof_encountered = 0; | |
1190 | rewind_input_string (); | |
1191 | YYACCEPT; | |
1192 | } | |
726f6388 JA |
1193 | } |
1194 | | simple_list1 ';' | |
1195 | { | |
1196 | $$ = $1; | |
1197 | if (need_here_doc) | |
1198 | gather_here_documents (); | |
3185942a JA |
1199 | if ((parser_state & PST_CMDSUBST) && current_token == shell_eof_token) |
1200 | { | |
1201 | global_command = $1; | |
1202 | eof_encountered = 0; | |
1203 | rewind_input_string (); | |
1204 | YYACCEPT; | |
1205 | } | |
726f6388 JA |
1206 | } |
1207 | ; | |
1208 | ||
ccc6cda3 | 1209 | simple_list1: simple_list1 AND_AND newline_list simple_list1 |
726f6388 | 1210 | { $$ = command_connect ($1, $4, AND_AND); } |
ccc6cda3 | 1211 | | simple_list1 OR_OR newline_list simple_list1 |
726f6388 JA |
1212 | { $$ = command_connect ($1, $4, OR_OR); } |
1213 | | simple_list1 '&' simple_list1 | |
1214 | { | |
1215 | if ($1->type == cm_connection) | |
1216 | $$ = connect_async_list ($1, $3, '&'); | |
1217 | else | |
1218 | $$ = command_connect ($1, $3, '&'); | |
1219 | } | |
1220 | | simple_list1 ';' simple_list1 | |
1221 | { $$ = command_connect ($1, $3, ';'); } | |
ccc6cda3 JA |
1222 | |
1223 | | pipeline_command | |
1224 | { $$ = $1; } | |
1225 | ; | |
1226 | ||
1227 | pipeline_command: pipeline | |
495aee44 CR |
1228 | { $$ = $1; } |
1229 | | BANG pipeline_command | |
726f6388 | 1230 | { |
95732b49 | 1231 | if ($2) |
495aee44 | 1232 | $2->flags ^= CMD_INVERT_RETURN; /* toggle */ |
726f6388 JA |
1233 | $$ = $2; |
1234 | } | |
495aee44 | 1235 | | timespec pipeline_command |
ccc6cda3 | 1236 | { |
95732b49 JA |
1237 | if ($2) |
1238 | $2->flags |= $1; | |
ccc6cda3 JA |
1239 | $$ = $2; |
1240 | } | |
b80f6443 JA |
1241 | | timespec list_terminator |
1242 | { | |
1243 | ELEMENT x; | |
1244 | ||
1245 | /* Boy, this is unclean. `time' by itself can | |
1246 | time a null command. We cheat and push a | |
1247 | newline back if the list_terminator was a newline | |
1248 | to avoid the double-newline problem (one to | |
1249 | terminate this, one to terminate the command) */ | |
1250 | x.word = 0; | |
1251 | x.redirect = 0; | |
1252 | $$ = make_simple_command (x, (COMMAND *)NULL); | |
1253 | $$->flags |= $1; | |
1254 | /* XXX - let's cheat and push a newline back */ | |
1255 | if ($2 == '\n') | |
1256 | token_to_read = '\n'; | |
a0c0a00f CR |
1257 | else if ($2 == ';') |
1258 | token_to_read = ';'; | |
d233b485 | 1259 | parser_state &= ~PST_REDIRLIST; /* make_simple_command sets this */ |
b80f6443 | 1260 | } |
495aee44 CR |
1261 | | BANG list_terminator |
1262 | { | |
1263 | ELEMENT x; | |
1264 | ||
1265 | /* This is just as unclean. Posix says that `!' | |
1266 | by itself should be equivalent to `false'. | |
1267 | We cheat and push a | |
1268 | newline back if the list_terminator was a newline | |
1269 | to avoid the double-newline problem (one to | |
1270 | terminate this, one to terminate the command) */ | |
1271 | x.word = 0; | |
1272 | x.redirect = 0; | |
1273 | $$ = make_simple_command (x, (COMMAND *)NULL); | |
1274 | $$->flags |= CMD_INVERT_RETURN; | |
1275 | /* XXX - let's cheat and push a newline back */ | |
1276 | if ($2 == '\n') | |
1277 | token_to_read = '\n'; | |
a0c0a00f CR |
1278 | if ($2 == ';') |
1279 | token_to_read = ';'; | |
d233b485 | 1280 | parser_state &= ~PST_REDIRLIST; /* make_simple_command sets this */ |
495aee44 | 1281 | } |
726f6388 JA |
1282 | ; |
1283 | ||
3185942a | 1284 | pipeline: pipeline '|' newline_list pipeline |
726f6388 | 1285 | { $$ = command_connect ($1, $4, '|'); } |
3185942a JA |
1286 | | pipeline BAR_AND newline_list pipeline |
1287 | { | |
1288 | /* Make cmd1 |& cmd2 equivalent to cmd1 2>&1 | cmd2 */ | |
1289 | COMMAND *tc; | |
0001803f | 1290 | REDIRECTEE rd, sd; |
3185942a JA |
1291 | REDIRECT *r; |
1292 | ||
89a92869 | 1293 | tc = $1->type == cm_simple ? (COMMAND *)$1->value.Simple : $1; |
0001803f | 1294 | sd.dest = 2; |
3185942a | 1295 | rd.dest = 1; |
0001803f | 1296 | r = make_redirection (sd, r_duplicating_output, rd, 0); |
3185942a JA |
1297 | if (tc->redirects) |
1298 | { | |
1299 | register REDIRECT *t; | |
1300 | for (t = tc->redirects; t->next; t = t->next) | |
1301 | ; | |
1302 | t->next = r; | |
1303 | } | |
1304 | else | |
1305 | tc->redirects = r; | |
1306 | ||
1307 | $$ = command_connect ($1, $4, '|'); | |
1308 | } | |
726f6388 JA |
1309 | | command |
1310 | { $$ = $1; } | |
1311 | ; | |
ccc6cda3 JA |
1312 | |
1313 | timespec: TIME | |
1314 | { $$ = CMD_TIME_PIPELINE; } | |
1315 | | TIME TIMEOPT | |
1316 | { $$ = CMD_TIME_PIPELINE|CMD_TIME_POSIX; } | |
495aee44 CR |
1317 | | TIME TIMEOPT TIMEIGN |
1318 | { $$ = CMD_TIME_PIPELINE|CMD_TIME_POSIX; } | |
ccc6cda3 | 1319 | ; |
726f6388 JA |
1320 | %% |
1321 | ||
1322 | /* Initial size to allocate for tokens, and the | |
1323 | amount to grow them by. */ | |
d166f048 | 1324 | #define TOKEN_DEFAULT_INITIAL_SIZE 496 |
726f6388 JA |
1325 | #define TOKEN_DEFAULT_GROW_SIZE 512 |
1326 | ||
b80f6443 JA |
1327 | /* Should we call prompt_again? */ |
1328 | #define SHOULD_PROMPT() \ | |
1329 | (interactive && (bash_input.type == st_stdin || bash_input.type == st_stream)) | |
1330 | ||
1331 | #if defined (ALIAS) | |
1332 | # define expanding_alias() (pushed_string_list && pushed_string_list->expander) | |
1333 | #else | |
1334 | # define expanding_alias() 0 | |
1335 | #endif | |
1336 | ||
726f6388 JA |
1337 | /* Global var is non-zero when end of file has been reached. */ |
1338 | int EOF_Reached = 0; | |
1339 | ||
f73dda09 JA |
1340 | #ifdef DEBUG |
1341 | static void | |
ccc6cda3 JA |
1342 | debug_parser (i) |
1343 | int i; | |
1344 | { | |
1345 | #if YYDEBUG != 0 | |
1346 | yydebug = i; | |
d233b485 CR |
1347 | yyoutstream = stdout; |
1348 | yyerrstream = stderr; | |
ccc6cda3 JA |
1349 | #endif |
1350 | } | |
f73dda09 | 1351 | #endif |
ccc6cda3 | 1352 | |
726f6388 JA |
1353 | /* yy_getc () returns the next available character from input or EOF. |
1354 | yy_ungetc (c) makes `c' the next character to read. | |
1355 | init_yy_io (get, unget, type, location) makes the function GET the | |
1356 | installed function for getting the next character, makes UNGET the | |
1357 | installed function for un-getting a character, sets the type of stream | |
1358 | (either string or file) from TYPE, and makes LOCATION point to where | |
1359 | the input is coming from. */ | |
1360 | ||
1361 | /* Unconditionally returns end-of-file. */ | |
ccc6cda3 | 1362 | int |
726f6388 JA |
1363 | return_EOF () |
1364 | { | |
1365 | return (EOF); | |
1366 | } | |
1367 | ||
1368 | /* Variable containing the current get and unget functions. | |
1369 | See ./input.h for a clearer description. */ | |
1370 | BASH_INPUT bash_input; | |
1371 | ||
ccc6cda3 JA |
1372 | /* Set all of the fields in BASH_INPUT to NULL. Free bash_input.name if it |
1373 | is non-null, avoiding a memory leak. */ | |
726f6388 JA |
1374 | void |
1375 | initialize_bash_input () | |
1376 | { | |
ccc6cda3 JA |
1377 | bash_input.type = st_none; |
1378 | FREE (bash_input.name); | |
726f6388 JA |
1379 | bash_input.name = (char *)NULL; |
1380 | bash_input.location.file = (FILE *)NULL; | |
1381 | bash_input.location.string = (char *)NULL; | |
f73dda09 JA |
1382 | bash_input.getter = (sh_cget_func_t *)NULL; |
1383 | bash_input.ungetter = (sh_cunget_func_t *)NULL; | |
726f6388 JA |
1384 | } |
1385 | ||
1386 | /* Set the contents of the current bash input stream from | |
1387 | GET, UNGET, TYPE, NAME, and LOCATION. */ | |
1388 | void | |
1389 | init_yy_io (get, unget, type, name, location) | |
f73dda09 JA |
1390 | sh_cget_func_t *get; |
1391 | sh_cunget_func_t *unget; | |
d166f048 | 1392 | enum stream_type type; |
f73dda09 | 1393 | const char *name; |
726f6388 JA |
1394 | INPUT_STREAM location; |
1395 | { | |
1396 | bash_input.type = type; | |
1397 | FREE (bash_input.name); | |
ccc6cda3 | 1398 | bash_input.name = name ? savestring (name) : (char *)NULL; |
726f6388 | 1399 | |
ccc6cda3 | 1400 | /* XXX */ |
726f6388 JA |
1401 | #if defined (CRAY) |
1402 | memcpy((char *)&bash_input.location.string, (char *)&location.string, sizeof(location)); | |
1403 | #else | |
1404 | bash_input.location = location; | |
1405 | #endif | |
1406 | bash_input.getter = get; | |
1407 | bash_input.ungetter = unget; | |
1408 | } | |
1409 | ||
7117c2d2 JA |
1410 | char * |
1411 | yy_input_name () | |
1412 | { | |
1413 | return (bash_input.name ? bash_input.name : "stdin"); | |
1414 | } | |
1415 | ||
726f6388 | 1416 | /* Call this to get the next character of input. */ |
f73dda09 | 1417 | static int |
726f6388 JA |
1418 | yy_getc () |
1419 | { | |
1420 | return (*(bash_input.getter)) (); | |
1421 | } | |
1422 | ||
1423 | /* Call this to unget C. That is, to make C the next character | |
1424 | to be read. */ | |
f73dda09 | 1425 | static int |
726f6388 JA |
1426 | yy_ungetc (c) |
1427 | int c; | |
1428 | { | |
1429 | return (*(bash_input.ungetter)) (c); | |
1430 | } | |
1431 | ||
1432 | #if defined (BUFFERED_INPUT) | |
f73dda09 | 1433 | #ifdef INCLUDE_UNUSED |
726f6388 JA |
1434 | int |
1435 | input_file_descriptor () | |
1436 | { | |
1437 | switch (bash_input.type) | |
1438 | { | |
1439 | case st_stream: | |
1440 | return (fileno (bash_input.location.file)); | |
1441 | case st_bstream: | |
1442 | return (bash_input.location.buffered_fd); | |
ccc6cda3 | 1443 | case st_stdin: |
726f6388 JA |
1444 | default: |
1445 | return (fileno (stdin)); | |
1446 | } | |
1447 | } | |
f73dda09 | 1448 | #endif |
726f6388 JA |
1449 | #endif /* BUFFERED_INPUT */ |
1450 | ||
1451 | /* **************************************************************** */ | |
1452 | /* */ | |
1453 | /* Let input be read from readline (). */ | |
1454 | /* */ | |
1455 | /* **************************************************************** */ | |
1456 | ||
1457 | #if defined (READLINE) | |
1458 | char *current_readline_prompt = (char *)NULL; | |
1459 | char *current_readline_line = (char *)NULL; | |
1460 | int current_readline_line_index = 0; | |
1461 | ||
1462 | static int | |
1463 | yy_readline_get () | |
1464 | { | |
ccc6cda3 | 1465 | SigHandler *old_sigint; |
f73dda09 JA |
1466 | int line_len; |
1467 | unsigned char c; | |
ccc6cda3 | 1468 | |
a0c0a00f | 1469 | if (current_readline_line == 0) |
726f6388 | 1470 | { |
a0c0a00f | 1471 | if (bash_readline_initialized == 0) |
726f6388 JA |
1472 | initialize_readline (); |
1473 | ||
1474 | #if defined (JOB_CONTROL) | |
1475 | if (job_control) | |
28ef6c31 | 1476 | give_terminal_to (shell_pgrp, 0); |
726f6388 JA |
1477 | #endif /* JOB_CONTROL */ |
1478 | ||
a0c0a00f | 1479 | old_sigint = IMPOSSIBLE_TRAP_HANDLER; |
726f6388 JA |
1480 | if (signal_is_ignored (SIGINT) == 0) |
1481 | { | |
ac50fbac | 1482 | /* interrupt_immediately++; */ |
495aee44 | 1483 | old_sigint = (SigHandler *)set_signal_handler (SIGINT, sigint_sighandler); |
726f6388 JA |
1484 | } |
1485 | ||
d233b485 | 1486 | sh_unset_nodelay_mode (fileno (rl_instream)); /* just in case */ |
ccc6cda3 JA |
1487 | current_readline_line = readline (current_readline_prompt ? |
1488 | current_readline_prompt : ""); | |
726f6388 | 1489 | |
ac50fbac | 1490 | CHECK_TERMSIG; |
495aee44 | 1491 | if (signal_is_ignored (SIGINT) == 0) |
726f6388 | 1492 | { |
ac50fbac | 1493 | /* interrupt_immediately--; */ |
495aee44 CR |
1494 | if (old_sigint != IMPOSSIBLE_TRAP_HANDLER) |
1495 | set_signal_handler (SIGINT, old_sigint); | |
726f6388 JA |
1496 | } |
1497 | ||
ccc6cda3 JA |
1498 | #if 0 |
1499 | /* Reset the prompt to the decoded value of prompt_string_pointer. */ | |
726f6388 | 1500 | reset_readline_prompt (); |
ccc6cda3 | 1501 | #endif |
726f6388 | 1502 | |
ccc6cda3 | 1503 | if (current_readline_line == 0) |
726f6388 JA |
1504 | return (EOF); |
1505 | ||
ccc6cda3 | 1506 | current_readline_line_index = 0; |
726f6388 | 1507 | line_len = strlen (current_readline_line); |
ccc6cda3 | 1508 | |
f73dda09 | 1509 | current_readline_line = (char *)xrealloc (current_readline_line, 2 + line_len); |
726f6388 JA |
1510 | current_readline_line[line_len++] = '\n'; |
1511 | current_readline_line[line_len] = '\0'; | |
1512 | } | |
1513 | ||
ccc6cda3 | 1514 | if (current_readline_line[current_readline_line_index] == 0) |
726f6388 JA |
1515 | { |
1516 | free (current_readline_line); | |
1517 | current_readline_line = (char *)NULL; | |
1518 | return (yy_readline_get ()); | |
1519 | } | |
1520 | else | |
1521 | { | |
f73dda09 | 1522 | c = current_readline_line[current_readline_line_index++]; |
726f6388 JA |
1523 | return (c); |
1524 | } | |
1525 | } | |
1526 | ||
1527 | static int | |
1528 | yy_readline_unget (c) | |
ccc6cda3 | 1529 | int c; |
726f6388 JA |
1530 | { |
1531 | if (current_readline_line_index && current_readline_line) | |
1532 | current_readline_line[--current_readline_line_index] = c; | |
1533 | return (c); | |
1534 | } | |
1535 | ||
ccc6cda3 | 1536 | void |
726f6388 JA |
1537 | with_input_from_stdin () |
1538 | { | |
1539 | INPUT_STREAM location; | |
1540 | ||
1541 | if (bash_input.type != st_stdin && stream_on_stack (st_stdin) == 0) | |
1542 | { | |
1543 | location.string = current_readline_line; | |
1544 | init_yy_io (yy_readline_get, yy_readline_unget, | |
1545 | st_stdin, "readline stdin", location); | |
1546 | } | |
1547 | } | |
1548 | ||
1549 | #else /* !READLINE */ | |
1550 | ||
1551 | void | |
1552 | with_input_from_stdin () | |
1553 | { | |
1554 | with_input_from_stream (stdin, "stdin"); | |
1555 | } | |
1556 | #endif /* !READLINE */ | |
1557 | ||
1558 | /* **************************************************************** */ | |
1559 | /* */ | |
1560 | /* Let input come from STRING. STRING is zero terminated. */ | |
1561 | /* */ | |
1562 | /* **************************************************************** */ | |
1563 | ||
1564 | static int | |
1565 | yy_string_get () | |
1566 | { | |
ccc6cda3 | 1567 | register char *string; |
f73dda09 | 1568 | register unsigned char c; |
726f6388 JA |
1569 | |
1570 | string = bash_input.location.string; | |
726f6388 JA |
1571 | |
1572 | /* If the string doesn't exist, or is empty, EOF found. */ | |
1573 | if (string && *string) | |
1574 | { | |
f73dda09 | 1575 | c = *string++; |
726f6388 | 1576 | bash_input.location.string = string; |
f73dda09 | 1577 | return (c); |
726f6388 | 1578 | } |
f73dda09 JA |
1579 | else |
1580 | return (EOF); | |
726f6388 JA |
1581 | } |
1582 | ||
1583 | static int | |
1584 | yy_string_unget (c) | |
1585 | int c; | |
1586 | { | |
1587 | *(--bash_input.location.string) = c; | |
1588 | return (c); | |
1589 | } | |
1590 | ||
1591 | void | |
1592 | with_input_from_string (string, name) | |
f73dda09 JA |
1593 | char *string; |
1594 | const char *name; | |
726f6388 JA |
1595 | { |
1596 | INPUT_STREAM location; | |
1597 | ||
1598 | location.string = string; | |
726f6388 JA |
1599 | init_yy_io (yy_string_get, yy_string_unget, st_string, name, location); |
1600 | } | |
1601 | ||
3185942a JA |
1602 | /* Count the number of characters we've consumed from bash_input.location.string |
1603 | and read into shell_input_line, but have not returned from shell_getc. | |
1604 | That is the true input location. Rewind bash_input.location.string by | |
1605 | that number of characters, so it points to the last character actually | |
1606 | consumed by the parser. */ | |
1607 | static void | |
1608 | rewind_input_string () | |
1609 | { | |
1610 | int xchars; | |
1611 | ||
1612 | /* number of unconsumed characters in the input -- XXX need to take newlines | |
1613 | into account, e.g., $(...\n) */ | |
1614 | xchars = shell_input_line_len - shell_input_line_index; | |
1615 | if (bash_input.location.string[-1] == '\n') | |
1616 | xchars++; | |
1617 | ||
1618 | /* XXX - how to reflect bash_input.location.string back to string passed to | |
1619 | parse_and_execute or xparse_dolparen? xparse_dolparen needs to know how | |
1620 | far into the string we parsed. parse_and_execute knows where bash_input. | |
1621 | location.string is, and how far from orig_string that is -- that's the | |
1622 | number of characters the command consumed. */ | |
1623 | ||
1624 | /* bash_input.location.string - xchars should be where we parsed to */ | |
1625 | /* need to do more validation on xchars value for sanity -- test cases. */ | |
1626 | bash_input.location.string -= xchars; | |
1627 | } | |
1628 | ||
726f6388 JA |
1629 | /* **************************************************************** */ |
1630 | /* */ | |
1631 | /* Let input come from STREAM. */ | |
1632 | /* */ | |
1633 | /* **************************************************************** */ | |
1634 | ||
bb70624e JA |
1635 | /* These two functions used to test the value of the HAVE_RESTARTABLE_SYSCALLS |
1636 | define, and just use getc/ungetc if it was defined, but since bash | |
1637 | installs its signal handlers without the SA_RESTART flag, some signals | |
1638 | (like SIGCHLD, SIGWINCH, etc.) received during a read(2) will not cause | |
1639 | the read to be restarted. We need to restart it ourselves. */ | |
1640 | ||
726f6388 JA |
1641 | static int |
1642 | yy_stream_get () | |
1643 | { | |
bb70624e | 1644 | int result; |
726f6388 | 1645 | |
bb70624e | 1646 | result = EOF; |
726f6388 | 1647 | if (bash_input.location.file) |
95732b49 | 1648 | { |
ac50fbac CR |
1649 | /* XXX - don't need terminate_immediately; getc_with_restart checks |
1650 | for terminating signals itself if read returns < 0 */ | |
95732b49 | 1651 | result = getc_with_restart (bash_input.location.file); |
95732b49 | 1652 | } |
726f6388 JA |
1653 | return (result); |
1654 | } | |
1655 | ||
1656 | static int | |
1657 | yy_stream_unget (c) | |
1658 | int c; | |
1659 | { | |
726f6388 | 1660 | return (ungetc_with_restart (c, bash_input.location.file)); |
726f6388 JA |
1661 | } |
1662 | ||
1663 | void | |
1664 | with_input_from_stream (stream, name) | |
1665 | FILE *stream; | |
f73dda09 | 1666 | const char *name; |
726f6388 JA |
1667 | { |
1668 | INPUT_STREAM location; | |
1669 | ||
1670 | location.file = stream; | |
1671 | init_yy_io (yy_stream_get, yy_stream_unget, st_stream, name, location); | |
1672 | } | |
1673 | ||
1674 | typedef struct stream_saver { | |
1675 | struct stream_saver *next; | |
1676 | BASH_INPUT bash_input; | |
1677 | int line; | |
1678 | #if defined (BUFFERED_INPUT) | |
1679 | BUFFERED_STREAM *bstream; | |
1680 | #endif /* BUFFERED_INPUT */ | |
1681 | } STREAM_SAVER; | |
1682 | ||
1683 | /* The globally known line number. */ | |
1684 | int line_number = 0; | |
1685 | ||
495aee44 CR |
1686 | /* The line number offset set by assigning to LINENO. Not currently used. */ |
1687 | int line_number_base = 0; | |
1688 | ||
cce855bc JA |
1689 | #if defined (COND_COMMAND) |
1690 | static int cond_lineno; | |
1691 | static int cond_token; | |
1692 | #endif | |
1693 | ||
726f6388 JA |
1694 | STREAM_SAVER *stream_list = (STREAM_SAVER *)NULL; |
1695 | ||
ccc6cda3 JA |
1696 | void |
1697 | push_stream (reset_lineno) | |
1698 | int reset_lineno; | |
726f6388 JA |
1699 | { |
1700 | STREAM_SAVER *saver = (STREAM_SAVER *)xmalloc (sizeof (STREAM_SAVER)); | |
1701 | ||
1702 | xbcopy ((char *)&bash_input, (char *)&(saver->bash_input), sizeof (BASH_INPUT)); | |
1703 | ||
1704 | #if defined (BUFFERED_INPUT) | |
1705 | saver->bstream = (BUFFERED_STREAM *)NULL; | |
1706 | /* If we have a buffered stream, clear out buffers[fd]. */ | |
1707 | if (bash_input.type == st_bstream && bash_input.location.buffered_fd >= 0) | |
cce855bc JA |
1708 | saver->bstream = set_buffered_stream (bash_input.location.buffered_fd, |
1709 | (BUFFERED_STREAM *)NULL); | |
726f6388 JA |
1710 | #endif /* BUFFERED_INPUT */ |
1711 | ||
1712 | saver->line = line_number; | |
1713 | bash_input.name = (char *)NULL; | |
1714 | saver->next = stream_list; | |
1715 | stream_list = saver; | |
ccc6cda3 JA |
1716 | EOF_Reached = 0; |
1717 | if (reset_lineno) | |
1718 | line_number = 0; | |
726f6388 JA |
1719 | } |
1720 | ||
ccc6cda3 | 1721 | void |
726f6388 JA |
1722 | pop_stream () |
1723 | { | |
726f6388 JA |
1724 | if (!stream_list) |
1725 | EOF_Reached = 1; | |
1726 | else | |
1727 | { | |
1728 | STREAM_SAVER *saver = stream_list; | |
1729 | ||
1730 | EOF_Reached = 0; | |
1731 | stream_list = stream_list->next; | |
1732 | ||
1733 | init_yy_io (saver->bash_input.getter, | |
1734 | saver->bash_input.ungetter, | |
1735 | saver->bash_input.type, | |
1736 | saver->bash_input.name, | |
1737 | saver->bash_input.location); | |
1738 | ||
1739 | #if defined (BUFFERED_INPUT) | |
1740 | /* If we have a buffered stream, restore buffers[fd]. */ | |
1741 | /* If the input file descriptor was changed while this was on the | |
1742 | save stack, update the buffered fd to the new file descriptor and | |
1743 | re-establish the buffer <-> bash_input fd correspondence. */ | |
1744 | if (bash_input.type == st_bstream && bash_input.location.buffered_fd >= 0) | |
28ef6c31 JA |
1745 | { |
1746 | if (bash_input_fd_changed) | |
726f6388 JA |
1747 | { |
1748 | bash_input_fd_changed = 0; | |
1749 | if (default_buffered_input >= 0) | |
1750 | { | |
1751 | bash_input.location.buffered_fd = default_buffered_input; | |
1752 | saver->bstream->b_fd = default_buffered_input; | |
28ef6c31 | 1753 | SET_CLOSE_ON_EXEC (default_buffered_input); |
726f6388 JA |
1754 | } |
1755 | } | |
28ef6c31 | 1756 | /* XXX could free buffered stream returned as result here. */ |
cce855bc | 1757 | set_buffered_stream (bash_input.location.buffered_fd, saver->bstream); |
28ef6c31 | 1758 | } |
726f6388 JA |
1759 | #endif /* BUFFERED_INPUT */ |
1760 | ||
1761 | line_number = saver->line; | |
1762 | ||
1763 | FREE (saver->bash_input.name); | |
1764 | free (saver); | |
1765 | } | |
1766 | } | |
1767 | ||
1768 | /* Return 1 if a stream of type TYPE is saved on the stack. */ | |
1769 | int | |
1770 | stream_on_stack (type) | |
ccc6cda3 | 1771 | enum stream_type type; |
726f6388 JA |
1772 | { |
1773 | register STREAM_SAVER *s; | |
ccc6cda3 | 1774 | |
726f6388 JA |
1775 | for (s = stream_list; s; s = s->next) |
1776 | if (s->bash_input.type == type) | |
1777 | return 1; | |
1778 | return 0; | |
1779 | } | |
1780 | ||
bb70624e JA |
1781 | /* Save the current token state and return it in a malloced array. */ |
1782 | int * | |
1783 | save_token_state () | |
1784 | { | |
1785 | int *ret; | |
1786 | ||
89a92869 | 1787 | ret = (int *)xmalloc (4 * sizeof (int)); |
bb70624e JA |
1788 | ret[0] = last_read_token; |
1789 | ret[1] = token_before_that; | |
1790 | ret[2] = two_tokens_ago; | |
89a92869 | 1791 | ret[3] = current_token; |
bb70624e JA |
1792 | return ret; |
1793 | } | |
1794 | ||
1795 | void | |
1796 | restore_token_state (ts) | |
1797 | int *ts; | |
1798 | { | |
1799 | if (ts == 0) | |
1800 | return; | |
1801 | last_read_token = ts[0]; | |
1802 | token_before_that = ts[1]; | |
1803 | two_tokens_ago = ts[2]; | |
89a92869 | 1804 | current_token = ts[3]; |
bb70624e JA |
1805 | } |
1806 | ||
726f6388 JA |
1807 | /* |
1808 | * This is used to inhibit alias expansion and reserved word recognition | |
ccc6cda3 JA |
1809 | * inside case statement pattern lists. A `case statement pattern list' is: |
1810 | * | |
726f6388 JA |
1811 | * everything between the `in' in a `case word in' and the next ')' |
1812 | * or `esac' | |
1813 | * everything between a `;;' and the next `)' or `esac' | |
1814 | */ | |
726f6388 | 1815 | |
cce855bc JA |
1816 | #if defined (ALIAS) || defined (DPAREN_ARITHMETIC) |
1817 | ||
ccc6cda3 JA |
1818 | #define END_OF_ALIAS 0 |
1819 | ||
726f6388 JA |
1820 | /* |
1821 | * Pseudo-global variables used in implementing token-wise alias expansion. | |
1822 | */ | |
1823 | ||
726f6388 | 1824 | /* |
ccc6cda3 | 1825 | * Pushing and popping strings. This works together with shell_getc to |
726f6388 JA |
1826 | * implement alias expansion on a per-token basis. |
1827 | */ | |
1828 | ||
ac50fbac CR |
1829 | #define PSH_ALIAS 0x01 |
1830 | #define PSH_DPAREN 0x02 | |
1831 | #define PSH_SOURCE 0x04 | |
1832 | ||
726f6388 JA |
1833 | typedef struct string_saver { |
1834 | struct string_saver *next; | |
1835 | int expand_alias; /* Value to set expand_alias to when string is popped. */ | |
1836 | char *saved_line; | |
cce855bc | 1837 | #if defined (ALIAS) |
ccc6cda3 | 1838 | alias_t *expander; /* alias that caused this line to be pushed. */ |
cce855bc | 1839 | #endif |
ac50fbac CR |
1840 | size_t saved_line_size, saved_line_index; |
1841 | int saved_line_terminator; | |
1842 | int flags; | |
726f6388 JA |
1843 | } STRING_SAVER; |
1844 | ||
1845 | STRING_SAVER *pushed_string_list = (STRING_SAVER *)NULL; | |
1846 | ||
726f6388 JA |
1847 | /* |
1848 | * Push the current shell_input_line onto a stack of such lines and make S | |
1849 | * the current input. Used when expanding aliases. EXPAND is used to set | |
1850 | * the value of expand_next_token when the string is popped, so that the | |
1851 | * word after the alias in the original line is handled correctly when the | |
1852 | * alias expands to multiple words. TOKEN is the token that was expanded | |
1853 | * into S; it is saved and used to prevent infinite recursive expansion. | |
1854 | */ | |
1855 | static void | |
ccc6cda3 | 1856 | push_string (s, expand, ap) |
726f6388 JA |
1857 | char *s; |
1858 | int expand; | |
ccc6cda3 | 1859 | alias_t *ap; |
726f6388 | 1860 | { |
f73dda09 | 1861 | STRING_SAVER *temp = (STRING_SAVER *)xmalloc (sizeof (STRING_SAVER)); |
726f6388 JA |
1862 | |
1863 | temp->expand_alias = expand; | |
1864 | temp->saved_line = shell_input_line; | |
1865 | temp->saved_line_size = shell_input_line_size; | |
1866 | temp->saved_line_index = shell_input_line_index; | |
1867 | temp->saved_line_terminator = shell_input_line_terminator; | |
ac50fbac | 1868 | temp->flags = 0; |
cce855bc | 1869 | #if defined (ALIAS) |
ccc6cda3 | 1870 | temp->expander = ap; |
ac50fbac CR |
1871 | if (ap) |
1872 | temp->flags = PSH_ALIAS; | |
cce855bc | 1873 | #endif |
726f6388 JA |
1874 | temp->next = pushed_string_list; |
1875 | pushed_string_list = temp; | |
1876 | ||
cce855bc | 1877 | #if defined (ALIAS) |
d166f048 JA |
1878 | if (ap) |
1879 | ap->flags |= AL_BEINGEXPANDED; | |
cce855bc | 1880 | #endif |
726f6388 JA |
1881 | |
1882 | shell_input_line = s; | |
ac50fbac | 1883 | shell_input_line_size = STRLEN (s); |
726f6388 JA |
1884 | shell_input_line_index = 0; |
1885 | shell_input_line_terminator = '\0'; | |
b80f6443 JA |
1886 | #if 0 |
1887 | parser_state &= ~PST_ALEXPNEXT; /* XXX */ | |
1888 | #endif | |
7117c2d2 JA |
1889 | |
1890 | set_line_mbstate (); | |
726f6388 JA |
1891 | } |
1892 | ||
1893 | /* | |
1894 | * Make the top of the pushed_string stack be the current shell input. | |
1895 | * Only called when there is something on the stack. Called from shell_getc | |
1896 | * when it thinks it has consumed the string generated by an alias expansion | |
1897 | * and needs to return to the original input line. | |
1898 | */ | |
1899 | static void | |
1900 | pop_string () | |
1901 | { | |
1902 | STRING_SAVER *t; | |
1903 | ||
1904 | FREE (shell_input_line); | |
1905 | shell_input_line = pushed_string_list->saved_line; | |
1906 | shell_input_line_index = pushed_string_list->saved_line_index; | |
1907 | shell_input_line_size = pushed_string_list->saved_line_size; | |
1908 | shell_input_line_terminator = pushed_string_list->saved_line_terminator; | |
ccc6cda3 JA |
1909 | |
1910 | if (pushed_string_list->expand_alias) | |
1911 | parser_state |= PST_ALEXPNEXT; | |
1912 | else | |
1913 | parser_state &= ~PST_ALEXPNEXT; | |
726f6388 JA |
1914 | |
1915 | t = pushed_string_list; | |
1916 | pushed_string_list = pushed_string_list->next; | |
ccc6cda3 | 1917 | |
cce855bc | 1918 | #if defined (ALIAS) |
d166f048 JA |
1919 | if (t->expander) |
1920 | t->expander->flags &= ~AL_BEINGEXPANDED; | |
cce855bc | 1921 | #endif |
ccc6cda3 JA |
1922 | |
1923 | free ((char *)t); | |
7117c2d2 JA |
1924 | |
1925 | set_line_mbstate (); | |
726f6388 JA |
1926 | } |
1927 | ||
1928 | static void | |
1929 | free_string_list () | |
1930 | { | |
ccc6cda3 | 1931 | register STRING_SAVER *t, *t1; |
726f6388 | 1932 | |
ccc6cda3 | 1933 | for (t = pushed_string_list; t; ) |
726f6388 JA |
1934 | { |
1935 | t1 = t->next; | |
1936 | FREE (t->saved_line); | |
cce855bc JA |
1937 | #if defined (ALIAS) |
1938 | if (t->expander) | |
1939 | t->expander->flags &= ~AL_BEINGEXPANDED; | |
1940 | #endif | |
726f6388 JA |
1941 | free ((char *)t); |
1942 | t = t1; | |
1943 | } | |
1944 | pushed_string_list = (STRING_SAVER *)NULL; | |
1945 | } | |
1946 | ||
cce855bc | 1947 | #endif /* ALIAS || DPAREN_ARITHMETIC */ |
ccc6cda3 | 1948 | |
b80f6443 JA |
1949 | void |
1950 | free_pushed_string_input () | |
1951 | { | |
1952 | #if defined (ALIAS) || defined (DPAREN_ARITHMETIC) | |
1953 | free_string_list (); | |
1954 | #endif | |
1955 | } | |
1956 | ||
ac50fbac CR |
1957 | int |
1958 | parser_expanding_alias () | |
1959 | { | |
1960 | return (expanding_alias ()); | |
1961 | } | |
1962 | ||
1963 | void | |
1964 | parser_save_alias () | |
1965 | { | |
1966 | #if defined (ALIAS) || defined (DPAREN_ARITHMETIC) | |
1967 | push_string ((char *)NULL, 0, (alias_t *)NULL); | |
1968 | pushed_string_list->flags = PSH_SOURCE; /* XXX - for now */ | |
1969 | #else | |
1970 | ; | |
1971 | #endif | |
1972 | } | |
1973 | ||
1974 | void | |
1975 | parser_restore_alias () | |
1976 | { | |
1977 | #if defined (ALIAS) || defined (DPAREN_ARITHMETIC) | |
1978 | if (pushed_string_list) | |
1979 | pop_string (); | |
1980 | #else | |
1981 | ; | |
1982 | #endif | |
1983 | } | |
1984 | ||
d233b485 CR |
1985 | #if defined (ALIAS) |
1986 | /* Before freeing AP, make sure that there aren't any cases of pointer | |
1987 | aliasing that could cause us to reference freed memory later on. */ | |
1988 | void | |
1989 | clear_string_list_expander (ap) | |
1990 | alias_t *ap; | |
1991 | { | |
1992 | register STRING_SAVER *t; | |
1993 | ||
1994 | for (t = pushed_string_list; t; t = t->next) | |
1995 | { | |
1996 | if (t->expander && t->expander == ap) | |
1997 | t->expander = 0; | |
1998 | } | |
1999 | } | |
2000 | #endif | |
2001 | ||
a0c0a00f CR |
2002 | void |
2003 | clear_shell_input_line () | |
2004 | { | |
2005 | if (shell_input_line) | |
2006 | shell_input_line[shell_input_line_index = 0] = '\0'; | |
2007 | } | |
2008 | ||
726f6388 JA |
2009 | /* Return a line of text, taken from wherever yylex () reads input. |
2010 | If there is no more input, then we return NULL. If REMOVE_QUOTED_NEWLINE | |
2011 | is non-zero, we remove unquoted \<newline> pairs. This is used by | |
2012 | read_secondary_line to read here documents. */ | |
2013 | static char * | |
2014 | read_a_line (remove_quoted_newline) | |
2015 | int remove_quoted_newline; | |
2016 | { | |
2017 | static char *line_buffer = (char *)NULL; | |
2018 | static int buffer_size = 0; | |
0001803f | 2019 | int indx, c, peekc, pass_next; |
726f6388 | 2020 | |
ccc6cda3 | 2021 | #if defined (READLINE) |
b80f6443 | 2022 | if (no_line_editing && SHOULD_PROMPT ()) |
ccc6cda3 | 2023 | #else |
b80f6443 | 2024 | if (SHOULD_PROMPT ()) |
ccc6cda3 JA |
2025 | #endif |
2026 | print_prompt (); | |
2027 | ||
0001803f | 2028 | pass_next = indx = 0; |
726f6388 JA |
2029 | while (1) |
2030 | { | |
726f6388 JA |
2031 | /* Allow immediate exit if interrupted during input. */ |
2032 | QUIT; | |
2033 | ||
95732b49 JA |
2034 | c = yy_getc (); |
2035 | ||
28ef6c31 | 2036 | /* Ignore null bytes in input. */ |
726f6388 | 2037 | if (c == 0) |
28ef6c31 JA |
2038 | { |
2039 | #if 0 | |
2040 | internal_warning ("read_a_line: ignored null byte in input"); | |
2041 | #endif | |
2042 | continue; | |
2043 | } | |
726f6388 JA |
2044 | |
2045 | /* If there is no more input, then we return NULL. */ | |
2046 | if (c == EOF) | |
2047 | { | |
ccc6cda3 JA |
2048 | if (interactive && bash_input.type == st_stream) |
2049 | clearerr (stdin); | |
726f6388 JA |
2050 | if (indx == 0) |
2051 | return ((char *)NULL); | |
2052 | c = '\n'; | |
2053 | } | |
2054 | ||
d233b485 CR |
2055 | /* `+2' in case the final character in the buffer is a newline or we |
2056 | have to handle CTLESC or CTLNUL. */ | |
ccc6cda3 | 2057 | RESIZE_MALLOCED_BUFFER (line_buffer, indx, 2, buffer_size, 128); |
726f6388 JA |
2058 | |
2059 | /* IF REMOVE_QUOTED_NEWLINES is non-zero, we are reading a | |
2060 | here document with an unquoted delimiter. In this case, | |
2061 | the line will be expanded as if it were in double quotes. | |
2062 | We allow a backslash to escape the next character, but we | |
2063 | need to treat the backslash specially only if a backslash | |
2064 | quoting a backslash-newline pair appears in the line. */ | |
2065 | if (pass_next) | |
28ef6c31 | 2066 | { |
726f6388 JA |
2067 | line_buffer[indx++] = c; |
2068 | pass_next = 0; | |
28ef6c31 | 2069 | } |
726f6388 JA |
2070 | else if (c == '\\' && remove_quoted_newline) |
2071 | { | |
495aee44 | 2072 | QUIT; |
726f6388 JA |
2073 | peekc = yy_getc (); |
2074 | if (peekc == '\n') | |
b80f6443 JA |
2075 | { |
2076 | line_number++; | |
2077 | continue; /* Make the unquoted \<newline> pair disappear. */ | |
2078 | } | |
726f6388 JA |
2079 | else |
2080 | { | |
2081 | yy_ungetc (peekc); | |
2082 | pass_next = 1; | |
2083 | line_buffer[indx++] = c; /* Preserve the backslash. */ | |
2084 | } | |
2085 | } | |
2086 | else | |
d233b485 CR |
2087 | { |
2088 | /* remove_quoted_newline is non-zero if the here-document delimiter | |
2089 | is unquoted. In this case, we will be expanding the lines and | |
2090 | need to make sure CTLESC and CTLNUL in the input are quoted. */ | |
2091 | if (remove_quoted_newline && (c == CTLESC || c == CTLNUL)) | |
2092 | line_buffer[indx++] = CTLESC; | |
2093 | line_buffer[indx++] = c; | |
2094 | } | |
726f6388 JA |
2095 | |
2096 | if (c == '\n') | |
2097 | { | |
2098 | line_buffer[indx] = '\0'; | |
2099 | return (line_buffer); | |
2100 | } | |
2101 | } | |
2102 | } | |
2103 | ||
2104 | /* Return a line as in read_a_line (), but insure that the prompt is | |
2105 | the secondary prompt. This is used to read the lines of a here | |
2106 | document. REMOVE_QUOTED_NEWLINE is non-zero if we should remove | |
2107 | newlines quoted with backslashes while reading the line. It is | |
2108 | non-zero unless the delimiter of the here document was quoted. */ | |
2109 | char * | |
2110 | read_secondary_line (remove_quoted_newline) | |
2111 | int remove_quoted_newline; | |
2112 | { | |
3185942a JA |
2113 | char *ret; |
2114 | int n, c; | |
2115 | ||
726f6388 | 2116 | prompt_string_pointer = &ps2_prompt; |
b80f6443 JA |
2117 | if (SHOULD_PROMPT()) |
2118 | prompt_again (); | |
3185942a JA |
2119 | ret = read_a_line (remove_quoted_newline); |
2120 | #if defined (HISTORY) | |
89a92869 | 2121 | if (ret && remember_on_history && (parser_state & PST_HEREDOC)) |
3185942a | 2122 | { |
a0c0a00f CR |
2123 | /* To make adding the here-document body right, we need to rely on |
2124 | history_delimiting_chars() returning \n for the first line of the | |
2125 | here-document body and the null string for the second and subsequent | |
2126 | lines, so we avoid double newlines. | |
3185942a JA |
2127 | current_command_line_count == 2 for the first line of the body. */ |
2128 | ||
2129 | current_command_line_count++; | |
2130 | maybe_add_history (ret); | |
2131 | } | |
2132 | #endif /* HISTORY */ | |
2133 | return ret; | |
726f6388 JA |
2134 | } |
2135 | ||
726f6388 JA |
2136 | /* **************************************************************** */ |
2137 | /* */ | |
2138 | /* YYLEX () */ | |
2139 | /* */ | |
2140 | /* **************************************************************** */ | |
2141 | ||
2142 | /* Reserved words. These are only recognized as the first word of a | |
2143 | command. */ | |
2144 | STRING_INT_ALIST word_token_alist[] = { | |
2145 | { "if", IF }, | |
2146 | { "then", THEN }, | |
2147 | { "else", ELSE }, | |
2148 | { "elif", ELIF }, | |
2149 | { "fi", FI }, | |
2150 | { "case", CASE }, | |
2151 | { "esac", ESAC }, | |
2152 | { "for", FOR }, | |
2153 | #if defined (SELECT_COMMAND) | |
2154 | { "select", SELECT }, | |
2155 | #endif | |
2156 | { "while", WHILE }, | |
2157 | { "until", UNTIL }, | |
2158 | { "do", DO }, | |
2159 | { "done", DONE }, | |
2160 | { "in", IN }, | |
2161 | { "function", FUNCTION }, | |
ccc6cda3 JA |
2162 | #if defined (COMMAND_TIMING) |
2163 | { "time", TIME }, | |
2164 | #endif | |
726f6388 JA |
2165 | { "{", '{' }, |
2166 | { "}", '}' }, | |
2167 | { "!", BANG }, | |
cce855bc JA |
2168 | #if defined (COND_COMMAND) |
2169 | { "[[", COND_START }, | |
2170 | { "]]", COND_END }, | |
3185942a JA |
2171 | #endif |
2172 | #if defined (COPROCESS_SUPPORT) | |
2173 | { "coproc", COPROC }, | |
cce855bc | 2174 | #endif |
726f6388 JA |
2175 | { (char *)NULL, 0} |
2176 | }; | |
2177 | ||
7117c2d2 JA |
2178 | /* other tokens that can be returned by read_token() */ |
2179 | STRING_INT_ALIST other_token_alist[] = { | |
2180 | /* Multiple-character tokens with special values */ | |
495aee44 | 2181 | { "--", TIMEIGN }, |
7117c2d2 JA |
2182 | { "-p", TIMEOPT }, |
2183 | { "&&", AND_AND }, | |
2184 | { "||", OR_OR }, | |
2185 | { ">>", GREATER_GREATER }, | |
2186 | { "<<", LESS_LESS }, | |
2187 | { "<&", LESS_AND }, | |
2188 | { ">&", GREATER_AND }, | |
2189 | { ";;", SEMI_SEMI }, | |
3185942a JA |
2190 | { ";&", SEMI_AND }, |
2191 | { ";;&", SEMI_SEMI_AND }, | |
7117c2d2 JA |
2192 | { "<<-", LESS_LESS_MINUS }, |
2193 | { "<<<", LESS_LESS_LESS }, | |
2194 | { "&>", AND_GREATER }, | |
3185942a | 2195 | { "&>>", AND_GREATER_GREATER }, |
7117c2d2 JA |
2196 | { "<>", LESS_GREATER }, |
2197 | { ">|", GREATER_BAR }, | |
3185942a | 2198 | { "|&", BAR_AND }, |
7117c2d2 JA |
2199 | { "EOF", yacc_EOF }, |
2200 | /* Tokens whose value is the character itself */ | |
2201 | { ">", '>' }, | |
2202 | { "<", '<' }, | |
2203 | { "-", '-' }, | |
2204 | { "{", '{' }, | |
2205 | { "}", '}' }, | |
2206 | { ";", ';' }, | |
2207 | { "(", '(' }, | |
2208 | { ")", ')' }, | |
2209 | { "|", '|' }, | |
2210 | { "&", '&' }, | |
2211 | { "newline", '\n' }, | |
2212 | { (char *)NULL, 0} | |
2213 | }; | |
2214 | ||
2215 | /* others not listed here: | |
2216 | WORD look at yylval.word | |
2217 | ASSIGNMENT_WORD look at yylval.word | |
2218 | NUMBER look at yylval.number | |
2219 | ARITH_CMD look at yylval.word_list | |
2220 | ARITH_FOR_EXPRS look at yylval.word_list | |
2221 | COND_CMD look at yylval.command | |
2222 | */ | |
b72432fd | 2223 | |
ccc6cda3 JA |
2224 | /* These are used by read_token_word, but appear up here so that shell_getc |
2225 | can use them to decide when to add otherwise blank lines to the history. */ | |
2226 | ||
2227 | /* The primary delimiter stack. */ | |
2228 | struct dstack dstack = { (char *)NULL, 0, 0 }; | |
2229 | ||
2230 | /* A temporary delimiter stack to be used when decoding prompt strings. | |
2231 | This is needed because command substitutions in prompt strings (e.g., PS2) | |
2232 | can screw up the parser's quoting state. */ | |
2233 | static struct dstack temp_dstack = { (char *)NULL, 0, 0 }; | |
2234 | ||
2235 | /* Macro for accessing the top delimiter on the stack. Returns the | |
2236 | delimiter or zero if none. */ | |
2237 | #define current_delimiter(ds) \ | |
2238 | (ds.delimiter_depth ? ds.delimiters[ds.delimiter_depth - 1] : 0) | |
2239 | ||
2240 | #define push_delimiter(ds, character) \ | |
2241 | do \ | |
2242 | { \ | |
2243 | if (ds.delimiter_depth + 2 > ds.delimiter_space) \ | |
f73dda09 | 2244 | ds.delimiters = (char *)xrealloc \ |
ccc6cda3 JA |
2245 | (ds.delimiters, (ds.delimiter_space += 10) * sizeof (char)); \ |
2246 | ds.delimiters[ds.delimiter_depth] = character; \ | |
2247 | ds.delimiter_depth++; \ | |
2248 | } \ | |
2249 | while (0) | |
2250 | ||
2251 | #define pop_delimiter(ds) ds.delimiter_depth-- | |
2252 | ||
726f6388 JA |
2253 | /* Return the next shell input character. This always reads characters |
2254 | from shell_input_line; when that line is exhausted, it is time to | |
2255 | read the next line. This is called by read_token when the shell is | |
2256 | processing normal command input. */ | |
ccc6cda3 | 2257 | |
28ef6c31 JA |
2258 | /* This implements one-character lookahead/lookbehind across physical input |
2259 | lines, to avoid something being lost because it's pushed back with | |
2260 | shell_ungetc when we're at the start of a line. */ | |
2261 | static int eol_ungetc_lookahead = 0; | |
2262 | ||
726f6388 JA |
2263 | static int |
2264 | shell_getc (remove_quoted_newline) | |
2265 | int remove_quoted_newline; | |
2266 | { | |
ccc6cda3 | 2267 | register int i; |
a0c0a00f | 2268 | int c, truncating, last_was_backslash; |
f73dda09 | 2269 | unsigned char uc; |
726f6388 JA |
2270 | |
2271 | QUIT; | |
2272 | ||
a0c0a00f | 2273 | last_was_backslash = 0; |
95732b49 JA |
2274 | if (sigwinch_received) |
2275 | { | |
2276 | sigwinch_received = 0; | |
2277 | get_new_window_size (0, (int *)0, (int *)0); | |
2278 | } | |
2279 | ||
28ef6c31 JA |
2280 | if (eol_ungetc_lookahead) |
2281 | { | |
2282 | c = eol_ungetc_lookahead; | |
2283 | eol_ungetc_lookahead = 0; | |
2284 | return (c); | |
2285 | } | |
2286 | ||
cce855bc | 2287 | #if defined (ALIAS) || defined (DPAREN_ARITHMETIC) |
726f6388 JA |
2288 | /* If shell_input_line[shell_input_line_index] == 0, but there is |
2289 | something on the pushed list of strings, then we don't want to go | |
2290 | off and get another line. We let the code down below handle it. */ | |
2291 | ||
2292 | if (!shell_input_line || ((!shell_input_line[shell_input_line_index]) && | |
2293 | (pushed_string_list == (STRING_SAVER *)NULL))) | |
cce855bc | 2294 | #else /* !ALIAS && !DPAREN_ARITHMETIC */ |
726f6388 | 2295 | if (!shell_input_line || !shell_input_line[shell_input_line_index]) |
cce855bc | 2296 | #endif /* !ALIAS && !DPAREN_ARITHMETIC */ |
726f6388 | 2297 | { |
726f6388 JA |
2298 | line_number++; |
2299 | ||
ac50fbac CR |
2300 | /* Let's not let one really really long line blow up memory allocation */ |
2301 | if (shell_input_line && shell_input_line_size >= 32768) | |
2302 | { | |
2303 | free (shell_input_line); | |
2304 | shell_input_line = 0; | |
2305 | shell_input_line_size = 0; | |
2306 | } | |
2307 | ||
726f6388 JA |
2308 | restart_read: |
2309 | ||
2310 | /* Allow immediate exit if interrupted during input. */ | |
2311 | QUIT; | |
2312 | ||
ac50fbac | 2313 | i = truncating = 0; |
726f6388 JA |
2314 | shell_input_line_terminator = 0; |
2315 | ||
b80f6443 JA |
2316 | /* If the shell is interatctive, but not currently printing a prompt |
2317 | (interactive_shell && interactive == 0), we don't want to print | |
2318 | notifies or cleanup the jobs -- we want to defer it until we do | |
2319 | print the next prompt. */ | |
2320 | if (interactive_shell == 0 || SHOULD_PROMPT()) | |
2321 | { | |
726f6388 JA |
2322 | #if defined (JOB_CONTROL) |
2323 | /* This can cause a problem when reading a command as the result | |
2324 | of a trap, when the trap is called from flush_child. This call | |
2325 | had better not cause jobs to disappear from the job table in | |
2326 | that case, or we will have big trouble. */ | |
b80f6443 | 2327 | notify_and_cleanup (); |
726f6388 | 2328 | #else /* !JOB_CONTROL */ |
b80f6443 | 2329 | cleanup_dead_jobs (); |
726f6388 | 2330 | #endif /* !JOB_CONTROL */ |
b80f6443 | 2331 | } |
726f6388 JA |
2332 | |
2333 | #if defined (READLINE) | |
b80f6443 | 2334 | if (no_line_editing && SHOULD_PROMPT()) |
726f6388 | 2335 | #else |
b80f6443 | 2336 | if (SHOULD_PROMPT()) |
726f6388 JA |
2337 | #endif |
2338 | print_prompt (); | |
2339 | ||
2340 | if (bash_input.type == st_stream) | |
2341 | clearerr (stdin); | |
2342 | ||
28ef6c31 | 2343 | while (1) |
726f6388 | 2344 | { |
28ef6c31 JA |
2345 | c = yy_getc (); |
2346 | ||
726f6388 JA |
2347 | /* Allow immediate exit if interrupted during input. */ |
2348 | QUIT; | |
2349 | ||
28ef6c31 JA |
2350 | if (c == '\0') |
2351 | { | |
2352 | #if 0 | |
2353 | internal_warning ("shell_getc: ignored null byte in input"); | |
2354 | #endif | |
d233b485 CR |
2355 | /* If we get EOS while parsing a string, treat it as EOF so we |
2356 | don't just keep looping. Happens very rarely */ | |
2357 | if (bash_input.type == st_string) | |
2358 | { | |
2359 | if (i == 0) | |
2360 | shell_input_line_terminator = EOF; | |
2361 | shell_input_line[i] = '\0'; | |
2362 | c = EOF; | |
2363 | break; | |
2364 | } | |
28ef6c31 JA |
2365 | continue; |
2366 | } | |
2367 | ||
ac50fbac CR |
2368 | /* Theoretical overflow */ |
2369 | /* If we can't put 256 bytes more into the buffer, allocate | |
2370 | everything we can and fill it as full as we can. */ | |
2371 | /* XXX - we ignore rest of line using `truncating' flag */ | |
2372 | if (shell_input_line_size > (SIZE_MAX - 256)) | |
2373 | { | |
2374 | size_t n; | |
2375 | ||
2376 | n = SIZE_MAX - i; /* how much more can we put into the buffer? */ | |
2377 | if (n <= 2) /* we have to save 1 for the newline added below */ | |
2378 | { | |
2379 | if (truncating == 0) | |
a0c0a00f | 2380 | internal_warning(_("shell_getc: shell_input_line_size (%zu) exceeds SIZE_MAX (%lu): line truncated"), shell_input_line_size, (unsigned long)SIZE_MAX); |
ac50fbac CR |
2381 | shell_input_line[i] = '\0'; |
2382 | truncating = 1; | |
2383 | } | |
2384 | if (shell_input_line_size < SIZE_MAX) | |
2385 | { | |
2386 | shell_input_line_size = SIZE_MAX; | |
2387 | shell_input_line = xrealloc (shell_input_line, shell_input_line_size); | |
2388 | } | |
2389 | } | |
2390 | else | |
2391 | RESIZE_MALLOCED_BUFFER (shell_input_line, i, 2, shell_input_line_size, 256); | |
726f6388 JA |
2392 | |
2393 | if (c == EOF) | |
2394 | { | |
2395 | if (bash_input.type == st_stream) | |
2396 | clearerr (stdin); | |
2397 | ||
ccc6cda3 | 2398 | if (i == 0) |
726f6388 JA |
2399 | shell_input_line_terminator = EOF; |
2400 | ||
2401 | shell_input_line[i] = '\0'; | |
2402 | break; | |
2403 | } | |
2404 | ||
ac50fbac CR |
2405 | if (truncating == 0 || c == '\n') |
2406 | shell_input_line[i++] = c; | |
726f6388 JA |
2407 | |
2408 | if (c == '\n') | |
2409 | { | |
2410 | shell_input_line[--i] = '\0'; | |
2411 | current_command_line_count++; | |
2412 | break; | |
2413 | } | |
a0c0a00f CR |
2414 | |
2415 | last_was_backslash = last_was_backslash == 0 && c == '\\'; | |
726f6388 | 2416 | } |
28ef6c31 | 2417 | |
726f6388 JA |
2418 | shell_input_line_index = 0; |
2419 | shell_input_line_len = i; /* == strlen (shell_input_line) */ | |
2420 | ||
7117c2d2 JA |
2421 | set_line_mbstate (); |
2422 | ||
726f6388 | 2423 | #if defined (HISTORY) |
ccc6cda3 | 2424 | if (remember_on_history && shell_input_line && shell_input_line[0]) |
726f6388 JA |
2425 | { |
2426 | char *expansions; | |
ccc6cda3 | 2427 | # if defined (BANG_HISTORY) |
ccc6cda3 JA |
2428 | /* If the current delimiter is a single quote, we should not be |
2429 | performing history expansion, even if we're on a different | |
2430 | line from the original single quote. */ | |
ccc6cda3 | 2431 | if (current_delimiter (dstack) == '\'') |
d233b485 CR |
2432 | history_quoting_state = '\''; |
2433 | else if (current_delimiter (dstack) == '"') | |
2434 | history_quoting_state = '"'; | |
2435 | else | |
2436 | history_quoting_state = 0; | |
ccc6cda3 | 2437 | # endif |
a0c0a00f CR |
2438 | /* Calling with a third argument of 1 allows remember_on_history to |
2439 | determine whether or not the line is saved to the history list */ | |
726f6388 | 2440 | expansions = pre_process_line (shell_input_line, 1, 1); |
ccc6cda3 | 2441 | # if defined (BANG_HISTORY) |
d233b485 | 2442 | history_quoting_state = 0; |
ccc6cda3 | 2443 | # endif |
d166f048 JA |
2444 | if (expansions != shell_input_line) |
2445 | { | |
2446 | free (shell_input_line); | |
2447 | shell_input_line = expansions; | |
2448 | shell_input_line_len = shell_input_line ? | |
2449 | strlen (shell_input_line) : 0; | |
495aee44 | 2450 | if (shell_input_line_len == 0) |
d166f048 JA |
2451 | current_command_line_count--; |
2452 | ||
2453 | /* We have to force the xrealloc below because we don't know | |
28ef6c31 | 2454 | the true allocated size of shell_input_line anymore. */ |
d166f048 | 2455 | shell_input_line_size = shell_input_line_len; |
7117c2d2 JA |
2456 | |
2457 | set_line_mbstate (); | |
d166f048 | 2458 | } |
726f6388 | 2459 | } |
28ef6c31 JA |
2460 | /* Try to do something intelligent with blank lines encountered while |
2461 | entering multi-line commands. XXX - this is grotesque */ | |
ccc6cda3 JA |
2462 | else if (remember_on_history && shell_input_line && |
2463 | shell_input_line[0] == '\0' && | |
28ef6c31 | 2464 | current_command_line_count > 1) |
ccc6cda3 | 2465 | { |
28ef6c31 JA |
2466 | if (current_delimiter (dstack)) |
2467 | /* We know shell_input_line[0] == 0 and we're reading some sort of | |
2468 | quoted string. This means we've got a line consisting of only | |
2469 | a newline in a quoted string. We want to make sure this line | |
2470 | gets added to the history. */ | |
2471 | maybe_add_history (shell_input_line); | |
2472 | else | |
2473 | { | |
2474 | char *hdcs; | |
495aee44 | 2475 | hdcs = history_delimiting_chars (shell_input_line); |
28ef6c31 JA |
2476 | if (hdcs && hdcs[0] == ';') |
2477 | maybe_add_history (shell_input_line); | |
2478 | } | |
ccc6cda3 JA |
2479 | } |
2480 | ||
726f6388 JA |
2481 | #endif /* HISTORY */ |
2482 | ||
2483 | if (shell_input_line) | |
2484 | { | |
2485 | /* Lines that signify the end of the shell's input should not be | |
ac50fbac CR |
2486 | echoed. We should not echo lines while parsing command |
2487 | substitutions with recursive calls into the parsing engine; those | |
2488 | should only be echoed once when we read the word. That is the | |
2489 | reason for the test against shell_eof_token, which is set to a | |
2490 | right paren when parsing the contents of command substitutions. */ | |
726f6388 | 2491 | if (echo_input_at_read && (shell_input_line[0] || |
ac50fbac CR |
2492 | shell_input_line_terminator != EOF) && |
2493 | shell_eof_token == 0) | |
726f6388 JA |
2494 | fprintf (stderr, "%s\n", shell_input_line); |
2495 | } | |
2496 | else | |
2497 | { | |
2498 | shell_input_line_size = 0; | |
2499 | prompt_string_pointer = ¤t_prompt_string; | |
b80f6443 JA |
2500 | if (SHOULD_PROMPT ()) |
2501 | prompt_again (); | |
726f6388 JA |
2502 | goto restart_read; |
2503 | } | |
2504 | ||
2505 | /* Add the newline to the end of this string, iff the string does | |
2506 | not already end in an EOF character. */ | |
2507 | if (shell_input_line_terminator != EOF) | |
2508 | { | |
6ebbb24a | 2509 | if (shell_input_line_size < SIZE_MAX-3 && (shell_input_line_len+3 > shell_input_line_size)) |
f73dda09 | 2510 | shell_input_line = (char *)xrealloc (shell_input_line, |
726f6388 JA |
2511 | 1 + (shell_input_line_size += 2)); |
2512 | ||
a0c0a00f CR |
2513 | /* Don't add a newline to a string that ends with a backslash if we're |
2514 | going to be removing quoted newlines, since that will eat the | |
2515 | backslash. Add another backslash instead (will be removed by | |
2516 | word expansion). */ | |
2517 | if (bash_input.type == st_string && expanding_alias() == 0 && last_was_backslash && c == EOF && remove_quoted_newline) | |
2518 | shell_input_line[shell_input_line_len] = '\\'; | |
2519 | else | |
2520 | shell_input_line[shell_input_line_len] = '\n'; | |
ccc6cda3 | 2521 | shell_input_line[shell_input_line_len + 1] = '\0'; |
7117c2d2 JA |
2522 | |
2523 | set_line_mbstate (); | |
726f6388 JA |
2524 | } |
2525 | } | |
ccc6cda3 | 2526 | |
495aee44 | 2527 | next_alias_char: |
f73dda09 | 2528 | uc = shell_input_line[shell_input_line_index]; |
726f6388 | 2529 | |
f73dda09 | 2530 | if (uc) |
726f6388 JA |
2531 | shell_input_line_index++; |
2532 | ||
cce855bc | 2533 | #if defined (ALIAS) || defined (DPAREN_ARITHMETIC) |
f73dda09 | 2534 | /* If UC is NULL, we have reached the end of the current input string. If |
726f6388 JA |
2535 | pushed_string_list is non-empty, it's time to pop to the previous string |
2536 | because we have fully consumed the result of the last alias expansion. | |
2537 | Do it transparently; just return the next character of the string popped | |
2538 | to. */ | |
ac50fbac CR |
2539 | /* If pushed_string_list != 0 but pushed_string_list->expander == 0 (not |
2540 | currently tested) and the flags value is not PSH_SOURCE, we are not | |
2541 | parsing an alias, we have just saved one (push_string, when called by | |
2542 | the parse_dparen code) In this case, just go on as well. The PSH_SOURCE | |
2543 | case is handled below. */ | |
d233b485 CR |
2544 | |
2545 | /* If we're at the end of an alias expansion add a space to make sure that | |
2546 | the alias remains marked as being in use while we expand its last word. | |
2547 | This makes sure that pop_string doesn't mark the alias as not in use | |
2548 | before the string resulting from the alias expansion is tokenized and | |
2549 | checked for alias expansion, preventing recursion. At this point, the | |
2550 | last character in shell_input_line is the last character of the alias | |
2551 | expansion. We test that last character to determine whether or not to | |
2552 | return the space that will delimit the token and postpone the pop_string. | |
2553 | This set of conditions duplicates what used to be in mk_alexpansion () | |
2554 | below, with the addition that we don't add a space if we're currently | |
2555 | reading a quoted string or in a shell comment. */ | |
2556 | #ifndef OLD_ALIAS_HACK | |
2557 | if (uc == 0 && pushed_string_list && pushed_string_list->flags != PSH_SOURCE && | |
2558 | pushed_string_list->flags != PSH_DPAREN && | |
2559 | (parser_state & PST_COMMENT) == 0 && | |
ddf3f643 | 2560 | (parser_state & PST_ENDALIAS) == 0 && /* only once */ |
d233b485 | 2561 | shell_input_line_index > 0 && |
ddf3f643 | 2562 | shellblank (shell_input_line[shell_input_line_index-1]) == 0 && |
d233b485 CR |
2563 | shell_input_line[shell_input_line_index-1] != '\n' && |
2564 | shellmeta (shell_input_line[shell_input_line_index-1]) == 0 && | |
2565 | (current_delimiter (dstack) != '\'' && current_delimiter (dstack) != '"')) | |
2566 | { | |
ddf3f643 | 2567 | parser_state |= PST_ENDALIAS; |
d233b485 CR |
2568 | return ' '; /* END_ALIAS */ |
2569 | } | |
2570 | #endif | |
2571 | ||
0001803f | 2572 | pop_alias: |
d233b485 | 2573 | /* This case works for PSH_DPAREN as well */ |
ac50fbac | 2574 | if (uc == 0 && pushed_string_list && pushed_string_list->flags != PSH_SOURCE) |
726f6388 | 2575 | { |
ddf3f643 | 2576 | parser_state &= ~PST_ENDALIAS; |
b80f6443 JA |
2577 | pop_string (); |
2578 | uc = shell_input_line[shell_input_line_index]; | |
2579 | if (uc) | |
2580 | shell_input_line_index++; | |
726f6388 | 2581 | } |
cce855bc | 2582 | #endif /* ALIAS || DPAREN_ARITHMETIC */ |
726f6388 | 2583 | |
95732b49 JA |
2584 | if MBTEST(uc == '\\' && remove_quoted_newline && shell_input_line[shell_input_line_index] == '\n') |
2585 | { | |
2586 | if (SHOULD_PROMPT ()) | |
2587 | prompt_again (); | |
2588 | line_number++; | |
495aee44 CR |
2589 | /* What do we do here if we're expanding an alias whose definition |
2590 | includes an escaped newline? If that's the last character in the | |
2591 | alias expansion, we just pop the pushed string list (recall that | |
d233b485 CR |
2592 | we inhibit the appending of a space if newline is the last |
2593 | character). If it's not the last character, we need to consume the | |
2594 | quoted newline and move to the next character in the expansion. */ | |
509a4430 | 2595 | #if defined (ALIAS) |
0001803f CR |
2596 | if (expanding_alias () && shell_input_line[shell_input_line_index+1] == '\0') |
2597 | { | |
2598 | uc = 0; | |
2599 | goto pop_alias; | |
2600 | } | |
495aee44 CR |
2601 | else if (expanding_alias () && shell_input_line[shell_input_line_index+1] != '\0') |
2602 | { | |
2603 | shell_input_line_index++; /* skip newline */ | |
2604 | goto next_alias_char; /* and get next character */ | |
2605 | } | |
509a4430 CR |
2606 | else |
2607 | #endif | |
495aee44 | 2608 | goto restart_read; |
95732b49 JA |
2609 | } |
2610 | ||
495aee44 | 2611 | if (uc == 0 && shell_input_line_terminator == EOF) |
ccc6cda3 | 2612 | return ((shell_input_line_index != 0) ? '\n' : EOF); |
726f6388 | 2613 | |
ac50fbac CR |
2614 | #if defined (ALIAS) || defined (DPAREN_ARITHMETIC) |
2615 | /* We already know that we are not parsing an alias expansion because of the | |
2616 | check for expanding_alias() above. This knows how parse_and_execute | |
2617 | handles switching to st_string input while an alias is being expanded, | |
2618 | hence the check for pushed_string_list without pushed_string_list->expander | |
2619 | and the check for PSH_SOURCE as pushed_string_list->flags. | |
2620 | parse_and_execute and parse_string both change the input type to st_string | |
2621 | and place the string to be parsed and executed into location.string, so | |
2622 | we should not stop reading that until the pointer is '\0'. | |
2623 | The check for shell_input_line_terminator may be superfluous. | |
2624 | ||
2625 | This solves the problem of `.' inside a multi-line alias with embedded | |
2626 | newlines executing things out of order. */ | |
2627 | if (uc == 0 && bash_input.type == st_string && *bash_input.location.string && | |
2628 | pushed_string_list && pushed_string_list->flags == PSH_SOURCE && | |
2629 | shell_input_line_terminator == 0) | |
2630 | { | |
2631 | shell_input_line_index = 0; | |
2632 | goto restart_read; | |
2633 | } | |
2634 | #endif | |
2635 | ||
f73dda09 | 2636 | return (uc); |
726f6388 JA |
2637 | } |
2638 | ||
7117c2d2 JA |
2639 | /* Put C back into the input for the shell. This might need changes for |
2640 | HANDLE_MULTIBYTE around EOLs. Since we (currently) never push back a | |
2641 | character different than we read, shell_input_line_property doesn't need | |
2642 | to change when manipulating shell_input_line. The define for | |
2643 | last_shell_getc_is_singlebyte should take care of it, though. */ | |
726f6388 JA |
2644 | static void |
2645 | shell_ungetc (c) | |
2646 | int c; | |
2647 | { | |
2648 | if (shell_input_line && shell_input_line_index) | |
2649 | shell_input_line[--shell_input_line_index] = c; | |
28ef6c31 JA |
2650 | else |
2651 | eol_ungetc_lookahead = c; | |
726f6388 JA |
2652 | } |
2653 | ||
ca6a2ba4 CR |
2654 | char * |
2655 | parser_remaining_input () | |
2656 | { | |
2657 | if (shell_input_line == 0) | |
2658 | return 0; | |
d233b485 | 2659 | if ((int)shell_input_line_index < 0 || shell_input_line_index >= shell_input_line_len) |
a0c0a00f | 2660 | return ""; /* XXX */ |
ca6a2ba4 CR |
2661 | return (shell_input_line + shell_input_line_index); |
2662 | } | |
2663 | ||
f73dda09 JA |
2664 | #ifdef INCLUDE_UNUSED |
2665 | /* Back the input pointer up by one, effectively `ungetting' a character. */ | |
ccc6cda3 JA |
2666 | static void |
2667 | shell_ungetchar () | |
2668 | { | |
2669 | if (shell_input_line && shell_input_line_index) | |
2670 | shell_input_line_index--; | |
2671 | } | |
f73dda09 | 2672 | #endif |
ccc6cda3 JA |
2673 | |
2674 | /* Discard input until CHARACTER is seen, then push that character back | |
2675 | onto the input stream. */ | |
726f6388 JA |
2676 | static void |
2677 | discard_until (character) | |
2678 | int character; | |
2679 | { | |
2680 | int c; | |
2681 | ||
2682 | while ((c = shell_getc (0)) != EOF && c != character) | |
2683 | ; | |
2684 | ||
2685 | if (c != EOF) | |
2686 | shell_ungetc (c); | |
2687 | } | |
726f6388 JA |
2688 | |
2689 | void | |
0628567a JA |
2690 | execute_variable_command (command, vname) |
2691 | char *command, *vname; | |
726f6388 | 2692 | { |
726f6388 | 2693 | char *last_lastarg; |
b80f6443 | 2694 | sh_parser_state_t ps; |
726f6388 | 2695 | |
b80f6443 | 2696 | save_parser_state (&ps); |
726f6388 JA |
2697 | last_lastarg = get_string_value ("_"); |
2698 | if (last_lastarg) | |
2699 | last_lastarg = savestring (last_lastarg); | |
2700 | ||
0628567a | 2701 | parse_and_execute (savestring (command), vname, SEVAL_NONINT|SEVAL_NOHIST); |
726f6388 | 2702 | |
b80f6443 | 2703 | restore_parser_state (&ps); |
95732b49 | 2704 | bind_variable ("_", last_lastarg, 0); |
726f6388 JA |
2705 | FREE (last_lastarg); |
2706 | ||
ccc6cda3 | 2707 | if (token_to_read == '\n') /* reset_parser was called */ |
726f6388 JA |
2708 | token_to_read = 0; |
2709 | } | |
2710 | ||
a0c0a00f CR |
2711 | void |
2712 | push_token (x) | |
2713 | int x; | |
2714 | { | |
2715 | two_tokens_ago = token_before_that; | |
2716 | token_before_that = last_read_token; | |
2717 | last_read_token = current_token; | |
2718 | ||
2719 | current_token = x; | |
2720 | } | |
2721 | ||
ccc6cda3 JA |
2722 | /* Place to remember the token. We try to keep the buffer |
2723 | at a reasonable size, but it can grow. */ | |
2724 | static char *token = (char *)NULL; | |
2725 | ||
2726 | /* Current size of the token buffer. */ | |
2727 | static int token_buffer_size; | |
2728 | ||
726f6388 JA |
2729 | /* Command to read_token () explaining what we want it to do. */ |
2730 | #define READ 0 | |
2731 | #define RESET 1 | |
2732 | #define prompt_is_ps1 \ | |
2733 | (!prompt_string_pointer || prompt_string_pointer == &ps1_prompt) | |
2734 | ||
2735 | /* Function for yyparse to call. yylex keeps track of | |
2736 | the last two tokens read, and calls read_token. */ | |
ccc6cda3 | 2737 | static int |
726f6388 JA |
2738 | yylex () |
2739 | { | |
ccc6cda3 | 2740 | if (interactive && (current_token == 0 || current_token == '\n')) |
726f6388 JA |
2741 | { |
2742 | /* Before we print a prompt, we might have to check mailboxes. | |
2743 | We do this only if it is time to do so. Notice that only here | |
2744 | is the mail alarm reset; nothing takes place in check_mail () | |
2745 | except the checking of mail. Please don't change this. */ | |
b4a8651a | 2746 | if (prompt_is_ps1 && parse_and_execute_level == 0 && time_to_check_mail ()) |
726f6388 JA |
2747 | { |
2748 | check_mail (); | |
2749 | reset_mail_timer (); | |
2750 | } | |
2751 | ||
2752 | /* Avoid printing a prompt if we're not going to read anything, e.g. | |
2753 | after resetting the parser with read_token (RESET). */ | |
b80f6443 | 2754 | if (token_to_read == 0 && SHOULD_PROMPT ()) |
726f6388 JA |
2755 | prompt_again (); |
2756 | } | |
2757 | ||
ccc6cda3 | 2758 | two_tokens_ago = token_before_that; |
726f6388 JA |
2759 | token_before_that = last_read_token; |
2760 | last_read_token = current_token; | |
2761 | current_token = read_token (READ); | |
3185942a JA |
2762 | |
2763 | if ((parser_state & PST_EOFTOKEN) && current_token == shell_eof_token) | |
2764 | { | |
2765 | current_token = yacc_EOF; | |
2766 | if (bash_input.type == st_string) | |
2767 | rewind_input_string (); | |
2768 | } | |
d233b485 | 2769 | parser_state &= ~PST_EOFTOKEN; /* ??? */ |
3185942a | 2770 | |
726f6388 JA |
2771 | return (current_token); |
2772 | } | |
2773 | ||
726f6388 JA |
2774 | /* When non-zero, we have read the required tokens |
2775 | which allow ESAC to be the next one read. */ | |
ccc6cda3 | 2776 | static int esacs_needed_count; |
726f6388 | 2777 | |
d233b485 CR |
2778 | /* When non-zero, we can read IN as an acceptable token, regardless of how |
2779 | many newlines we read. */ | |
2780 | static int expecting_in_token; | |
2781 | ||
90a39f32 CR |
2782 | static void |
2783 | push_heredoc (r) | |
2784 | REDIRECT *r; | |
2785 | { | |
2786 | if (need_here_doc >= HEREDOC_MAX) | |
2787 | { | |
2788 | last_command_exit_value = EX_BADUSAGE; | |
2789 | need_here_doc = 0; | |
2790 | report_syntax_error (_("maximum here-document count exceeded")); | |
2791 | reset_parser (); | |
2792 | exit_shell (last_command_exit_value); | |
2793 | } | |
2794 | redir_stack[need_here_doc++] = r; | |
2795 | } | |
2796 | ||
726f6388 JA |
2797 | void |
2798 | gather_here_documents () | |
2799 | { | |
3185942a JA |
2800 | int r; |
2801 | ||
2802 | r = 0; | |
a0c0a00f | 2803 | here_doc_first_line = 1; |
daefb2c5 | 2804 | while (need_here_doc > 0) |
726f6388 | 2805 | { |
3185942a JA |
2806 | parser_state |= PST_HEREDOC; |
2807 | make_here_document (redir_stack[r++], line_number); | |
2808 | parser_state &= ~PST_HEREDOC; | |
726f6388 | 2809 | need_here_doc--; |
a0c0a00f | 2810 | redir_stack[r - 1] = 0; /* XXX */ |
726f6388 | 2811 | } |
a0c0a00f | 2812 | here_doc_first_line = 0; /* just in case */ |
726f6388 JA |
2813 | } |
2814 | ||
726f6388 JA |
2815 | /* When non-zero, an open-brace used to create a group is awaiting a close |
2816 | brace partner. */ | |
ccc6cda3 | 2817 | static int open_brace_count; |
726f6388 | 2818 | |
a0c0a00f CR |
2819 | /* In the following three macros, `token' is always last_read_token */ |
2820 | ||
2821 | /* Are we in the middle of parsing a redirection where we are about to read | |
2822 | a word? This is used to make sure alias expansion doesn't happen in the | |
2823 | middle of a redirection, even though we're parsing a simple command. */ | |
2824 | #define parsing_redirection(token) \ | |
2825 | (token == '<' || token == '>' || \ | |
2826 | token == GREATER_GREATER || token == GREATER_BAR || \ | |
2827 | token == LESS_GREATER || token == LESS_LESS_MINUS || \ | |
2828 | token == LESS_LESS || token == LESS_LESS_LESS || \ | |
2829 | token == LESS_AND || token == GREATER_AND || token == AND_GREATER) | |
2830 | ||
2831 | /* Is `token' one that will allow a WORD to be read in a command position? | |
2832 | We can read a simple command name on which we should attempt alias expansion | |
2833 | or we can read an assignment statement. */ | |
726f6388 | 2834 | #define command_token_position(token) \ |
a0c0a00f CR |
2835 | (((token) == ASSIGNMENT_WORD) || \ |
2836 | ((parser_state&PST_REDIRLIST) && parsing_redirection(token) == 0) || \ | |
3185942a | 2837 | ((token) != SEMI_SEMI && (token) != SEMI_AND && (token) != SEMI_SEMI_AND && reserved_word_acceptable(token))) |
726f6388 | 2838 | |
a0c0a00f | 2839 | /* Are we in a position where we can read an assignment statement? */ |
b80f6443 JA |
2840 | #define assignment_acceptable(token) \ |
2841 | (command_token_position(token) && ((parser_state & PST_CASEPAT) == 0)) | |
726f6388 JA |
2842 | |
2843 | /* Check to see if TOKEN is a reserved word and return the token | |
2844 | value if it is. */ | |
2845 | #define CHECK_FOR_RESERVED_WORD(tok) \ | |
2846 | do { \ | |
2847 | if (!dollar_present && !quoted && \ | |
2848 | reserved_word_acceptable (last_read_token)) \ | |
2849 | { \ | |
2850 | int i; \ | |
2851 | for (i = 0; word_token_alist[i].word != (char *)NULL; i++) \ | |
2852 | if (STREQ (tok, word_token_alist[i].word)) \ | |
2853 | { \ | |
ccc6cda3 | 2854 | if ((parser_state & PST_CASEPAT) && (word_token_alist[i].token != ESAC)) \ |
726f6388 | 2855 | break; \ |
b80f6443 | 2856 | if (word_token_alist[i].token == TIME && time_command_acceptable () == 0) \ |
cce855bc | 2857 | break; \ |
a0c0a00f CR |
2858 | if ((parser_state & PST_CASEPAT) && last_read_token == '|' && word_token_alist[i].token == ESAC) \ |
2859 | break; /* Posix grammar rule 4 */ \ | |
726f6388 | 2860 | if (word_token_alist[i].token == ESAC) \ |
ccc6cda3 JA |
2861 | parser_state &= ~(PST_CASEPAT|PST_CASESTMT); \ |
2862 | else if (word_token_alist[i].token == CASE) \ | |
2863 | parser_state |= PST_CASESTMT; \ | |
cce855bc JA |
2864 | else if (word_token_alist[i].token == COND_END) \ |
2865 | parser_state &= ~(PST_CONDCMD|PST_CONDEXPR); \ | |
2866 | else if (word_token_alist[i].token == COND_START) \ | |
2867 | parser_state |= PST_CONDCMD; \ | |
ccc6cda3 JA |
2868 | else if (word_token_alist[i].token == '{') \ |
2869 | open_brace_count++; \ | |
2870 | else if (word_token_alist[i].token == '}' && open_brace_count) \ | |
2871 | open_brace_count--; \ | |
726f6388 JA |
2872 | return (word_token_alist[i].token); \ |
2873 | } \ | |
2874 | } \ | |
2875 | } while (0) | |
2876 | ||
ccc6cda3 JA |
2877 | #if defined (ALIAS) |
2878 | ||
2879 | /* OK, we have a token. Let's try to alias expand it, if (and only if) | |
2880 | it's eligible. | |
2881 | ||
7117c2d2 | 2882 | It is eligible for expansion if EXPAND_ALIASES is set, and |
ccc6cda3 JA |
2883 | the token is unquoted and the last token read was a command |
2884 | separator (or expand_next_token is set), and we are currently | |
2885 | processing an alias (pushed_string_list is non-empty) and this | |
2886 | token is not the same as the current or any previously | |
2887 | processed alias. | |
2888 | ||
2889 | Special cases that disqualify: | |
2890 | In a pattern list in a case statement (parser_state & PST_CASEPAT). */ | |
b80f6443 JA |
2891 | |
2892 | static char * | |
2893 | mk_alexpansion (s) | |
2894 | char *s; | |
2895 | { | |
2896 | int l; | |
2897 | char *r; | |
2898 | ||
2899 | l = strlen (s); | |
2900 | r = xmalloc (l + 2); | |
2901 | strcpy (r, s); | |
d233b485 | 2902 | #ifdef OLD_ALIAS_HACK |
495aee44 CR |
2903 | /* If the last character in the alias is a newline, don't add a trailing |
2904 | space to the expansion. Works with shell_getc above. */ | |
d233b485 CR |
2905 | /* Need to do something about the case where the alias expansion contains |
2906 | an unmatched quoted string, since appending this space affects the | |
2907 | subsequent output. */ | |
2908 | if (l > 0 && r[l - 1] != ' ' && r[l - 1] != '\n' && shellmeta(r[l - 1]) == 0) | |
b80f6443 | 2909 | r[l++] = ' '; |
d233b485 | 2910 | #endif |
b80f6443 JA |
2911 | r[l] = '\0'; |
2912 | return r; | |
2913 | } | |
2914 | ||
ccc6cda3 | 2915 | static int |
f73dda09 JA |
2916 | alias_expand_token (tokstr) |
2917 | char *tokstr; | |
726f6388 | 2918 | { |
ccc6cda3 JA |
2919 | char *expanded; |
2920 | alias_t *ap; | |
726f6388 | 2921 | |
ccc6cda3 JA |
2922 | if (((parser_state & PST_ALEXPNEXT) || command_token_position (last_read_token)) && |
2923 | (parser_state & PST_CASEPAT) == 0) | |
726f6388 | 2924 | { |
f73dda09 | 2925 | ap = find_alias (tokstr); |
ccc6cda3 JA |
2926 | |
2927 | /* Currently expanding this token. */ | |
2928 | if (ap && (ap->flags & AL_BEINGEXPANDED)) | |
2929 | return (NO_EXPANSION); | |
2930 | ||
d233b485 | 2931 | #ifdef OLD_ALIAS_HACK |
b80f6443 | 2932 | /* mk_alexpansion puts an extra space on the end of the alias expansion, |
d233b485 CR |
2933 | so the lookahead by the parser works right (the alias needs to remain |
2934 | `in use' while parsing its last word to avoid alias recursion for | |
2935 | something like "alias echo=echo"). If this gets changed, make sure | |
2936 | the code in shell_getc that deals with reaching the end of an | |
2937 | expanded alias is changed with it. */ | |
2938 | #endif | |
b80f6443 JA |
2939 | expanded = ap ? mk_alexpansion (ap->value) : (char *)NULL; |
2940 | ||
ccc6cda3 JA |
2941 | if (expanded) |
2942 | { | |
2943 | push_string (expanded, ap->flags & AL_EXPANDNEXT, ap); | |
2944 | return (RE_READ_TOKEN); | |
2945 | } | |
2946 | else | |
2947 | /* This is an eligible token that does not have an expansion. */ | |
2948 | return (NO_EXPANSION); | |
726f6388 | 2949 | } |
ccc6cda3 JA |
2950 | return (NO_EXPANSION); |
2951 | } | |
2952 | #endif /* ALIAS */ | |
726f6388 | 2953 | |
cce855bc JA |
2954 | static int |
2955 | time_command_acceptable () | |
2956 | { | |
2957 | #if defined (COMMAND_TIMING) | |
495aee44 CR |
2958 | int i; |
2959 | ||
2960 | if (posixly_correct && shell_compatibility_level > 41) | |
2961 | { | |
2962 | /* Quick check of the rest of the line to find the next token. If it | |
2963 | begins with a `-', Posix says to not return `time' as the token. | |
2964 | This was interp 267. */ | |
2965 | i = shell_input_line_index; | |
2966 | while (i < shell_input_line_len && (shell_input_line[i] == ' ' || shell_input_line[i] == '\t')) | |
2967 | i++; | |
2968 | if (shell_input_line[i] == '-') | |
2969 | return 0; | |
2970 | } | |
2971 | ||
cce855bc JA |
2972 | switch (last_read_token) |
2973 | { | |
2974 | case 0: | |
2975 | case ';': | |
2976 | case '\n': | |
a0c0a00f CR |
2977 | if (token_before_that == '|') |
2978 | return (0); | |
2979 | /* FALLTHROUGH */ | |
cce855bc JA |
2980 | case AND_AND: |
2981 | case OR_OR: | |
2982 | case '&': | |
af61c549 | 2983 | case WHILE: |
b72432fd | 2984 | case DO: |
af61c549 CR |
2985 | case UNTIL: |
2986 | case IF: | |
b72432fd | 2987 | case THEN: |
af61c549 | 2988 | case ELIF: |
b72432fd | 2989 | case ELSE: |
28ef6c31 | 2990 | case '{': /* } */ |
af61c549 CR |
2991 | case '(': /* )( */ |
2992 | case ')': /* only valid in case statement */ | |
495aee44 CR |
2993 | case BANG: /* ! time pipeline */ |
2994 | case TIME: /* time time pipeline */ | |
2995 | case TIMEOPT: /* time -p time pipeline */ | |
2996 | case TIMEIGN: /* time -p -- ... */ | |
cce855bc JA |
2997 | return 1; |
2998 | default: | |
2999 | return 0; | |
3000 | } | |
3001 | #else | |
3002 | return 0; | |
3003 | #endif /* COMMAND_TIMING */ | |
3004 | } | |
3005 | ||
ccc6cda3 JA |
3006 | /* Handle special cases of token recognition: |
3007 | IN is recognized if the last token was WORD and the token | |
3008 | before that was FOR or CASE or SELECT. | |
3009 | ||
3010 | DO is recognized if the last token was WORD and the token | |
3011 | before that was FOR or SELECT. | |
3012 | ||
3013 | ESAC is recognized if the last token caused `esacs_needed_count' | |
3014 | to be set | |
3015 | ||
3016 | `{' is recognized if the last token as WORD and the token | |
28ef6c31 JA |
3017 | before that was FUNCTION, or if we just parsed an arithmetic |
3018 | `for' command. | |
ccc6cda3 | 3019 | |
28ef6c31 | 3020 | `}' is recognized if there is an unclosed `{' present. |
cce855bc JA |
3021 | |
3022 | `-p' is returned as TIMEOPT if the last read token was TIME. | |
495aee44 | 3023 | `--' is returned as TIMEIGN if the last read token was TIMEOPT. |
cce855bc JA |
3024 | |
3025 | ']]' is returned as COND_END if the parser is currently parsing | |
3026 | a conditional expression ((parser_state & PST_CONDEXPR) != 0) | |
3027 | ||
3028 | `time' is returned as TIME if and only if it is immediately | |
3029 | preceded by one of `;', `\n', `||', `&&', or `&'. | |
ccc6cda3 JA |
3030 | */ |
3031 | ||
3032 | static int | |
f73dda09 JA |
3033 | special_case_tokens (tokstr) |
3034 | char *tokstr; | |
ccc6cda3 | 3035 | { |
d233b485 | 3036 | /* Posix grammar rule 6 */ |
ccc6cda3 JA |
3037 | if ((last_read_token == WORD) && |
3038 | #if defined (SELECT_COMMAND) | |
3039 | ((token_before_that == FOR) || (token_before_that == CASE) || (token_before_that == SELECT)) && | |
3040 | #else | |
3041 | ((token_before_that == FOR) || (token_before_that == CASE)) && | |
3042 | #endif | |
f73dda09 | 3043 | (tokstr[0] == 'i' && tokstr[1] == 'n' && tokstr[2] == 0)) |
726f6388 | 3044 | { |
ccc6cda3 JA |
3045 | if (token_before_that == CASE) |
3046 | { | |
3047 | parser_state |= PST_CASEPAT; | |
3048 | esacs_needed_count++; | |
3049 | } | |
d233b485 CR |
3050 | if (expecting_in_token) |
3051 | expecting_in_token--; | |
3052 | return (IN); | |
3053 | } | |
3054 | ||
3055 | /* XXX - leaving above code intact for now, but it should eventually be | |
3056 | removed in favor of this clause. */ | |
3057 | /* Posix grammar rule 6 */ | |
3058 | if (expecting_in_token && (last_read_token == WORD || last_read_token == '\n') && | |
3059 | (tokstr[0] == 'i' && tokstr[1] == 'n' && tokstr[2] == 0)) | |
3060 | { | |
3061 | if (parser_state & PST_CASESTMT) | |
3062 | { | |
3063 | parser_state |= PST_CASEPAT; | |
3064 | esacs_needed_count++; | |
3065 | } | |
3066 | expecting_in_token--; | |
ccc6cda3 JA |
3067 | return (IN); |
3068 | } | |
d233b485 CR |
3069 | /* Posix grammar rule 6, third word in FOR: for i; do command-list; done */ |
3070 | else if (expecting_in_token && (last_read_token == '\n' || last_read_token == ';') && | |
3071 | (tokstr[0] == 'd' && tokstr[1] == 'o' && tokstr[2] == '\0')) | |
3072 | { | |
3073 | expecting_in_token--; | |
3074 | return (DO); | |
3075 | } | |
726f6388 | 3076 | |
d233b485 | 3077 | /* for i do; command-list; done */ |
ccc6cda3 JA |
3078 | if (last_read_token == WORD && |
3079 | #if defined (SELECT_COMMAND) | |
3080 | (token_before_that == FOR || token_before_that == SELECT) && | |
3081 | #else | |
3082 | (token_before_that == FOR) && | |
3083 | #endif | |
f73dda09 | 3084 | (tokstr[0] == 'd' && tokstr[1] == 'o' && tokstr[2] == '\0')) |
d233b485 CR |
3085 | { |
3086 | if (expecting_in_token) | |
3087 | expecting_in_token--; | |
3088 | return (DO); | |
3089 | } | |
ccc6cda3 JA |
3090 | |
3091 | /* Ditto for ESAC in the CASE case. | |
3092 | Specifically, this handles "case word in esac", which is a legal | |
3093 | construct, certainly because someone will pass an empty arg to the | |
3094 | case construct, and we don't want it to barf. Of course, we should | |
3095 | insist that the case construct has at least one pattern in it, but | |
3096 | the designers disagree. */ | |
3097 | if (esacs_needed_count) | |
3098 | { | |
d233b485 | 3099 | if (last_read_token == IN && STREQ (tokstr, "esac")) |
726f6388 | 3100 | { |
d233b485 | 3101 | esacs_needed_count--; |
ccc6cda3 JA |
3102 | parser_state &= ~PST_CASEPAT; |
3103 | return (ESAC); | |
726f6388 | 3104 | } |
ccc6cda3 | 3105 | } |
726f6388 | 3106 | |
ccc6cda3 JA |
3107 | /* The start of a shell function definition. */ |
3108 | if (parser_state & PST_ALLOWOPNBRC) | |
3109 | { | |
3110 | parser_state &= ~PST_ALLOWOPNBRC; | |
f73dda09 | 3111 | if (tokstr[0] == '{' && tokstr[1] == '\0') /* } */ |
726f6388 | 3112 | { |
ccc6cda3 JA |
3113 | open_brace_count++; |
3114 | function_bstart = line_number; | |
3115 | return ('{'); /* } */ | |
726f6388 | 3116 | } |
ccc6cda3 JA |
3117 | } |
3118 | ||
28ef6c31 JA |
3119 | /* We allow a `do' after a for ((...)) without an intervening |
3120 | list_terminator */ | |
f73dda09 | 3121 | if (last_read_token == ARITH_FOR_EXPRS && tokstr[0] == 'd' && tokstr[1] == 'o' && !tokstr[2]) |
28ef6c31 | 3122 | return (DO); |
f73dda09 | 3123 | if (last_read_token == ARITH_FOR_EXPRS && tokstr[0] == '{' && tokstr[1] == '\0') /* } */ |
28ef6c31 JA |
3124 | { |
3125 | open_brace_count++; | |
3126 | return ('{'); /* } */ | |
3127 | } | |
3128 | ||
f73dda09 | 3129 | if (open_brace_count && reserved_word_acceptable (last_read_token) && tokstr[0] == '}' && !tokstr[1]) |
ccc6cda3 JA |
3130 | { |
3131 | open_brace_count--; /* { */ | |
3132 | return ('}'); | |
3133 | } | |
3134 | ||
cce855bc | 3135 | #if defined (COMMAND_TIMING) |
ccc6cda3 | 3136 | /* Handle -p after `time'. */ |
f73dda09 | 3137 | if (last_read_token == TIME && tokstr[0] == '-' && tokstr[1] == 'p' && !tokstr[2]) |
ccc6cda3 | 3138 | return (TIMEOPT); |
495aee44 CR |
3139 | /* Handle -- after `time -p'. */ |
3140 | if (last_read_token == TIMEOPT && tokstr[0] == '-' && tokstr[1] == '-' && !tokstr[2]) | |
3141 | return (TIMEIGN); | |
b80f6443 | 3142 | #endif |
cce855bc JA |
3143 | |
3144 | #if defined (COND_COMMAND) /* [[ */ | |
f73dda09 | 3145 | if ((parser_state & PST_CONDEXPR) && tokstr[0] == ']' && tokstr[1] == ']' && tokstr[2] == '\0') |
cce855bc JA |
3146 | return (COND_END); |
3147 | #endif | |
726f6388 | 3148 | |
ccc6cda3 JA |
3149 | return (-1); |
3150 | } | |
3151 | ||
3152 | /* Called from shell.c when Control-C is typed at top level. Or | |
3153 | by the error rule at top level. */ | |
3154 | void | |
3155 | reset_parser () | |
3156 | { | |
3157 | dstack.delimiter_depth = 0; /* No delimiters found so far. */ | |
3158 | open_brace_count = 0; | |
3159 | ||
0001803f CR |
3160 | #if defined (EXTENDED_GLOB) |
3161 | /* Reset to global value of extended glob */ | |
3162 | if (parser_state & PST_EXTPAT) | |
3163 | extended_glob = global_extglob; | |
3164 | #endif | |
3165 | ||
ccc6cda3 | 3166 | parser_state = 0; |
a0c0a00f | 3167 | here_doc_first_line = 0; |
ccc6cda3 | 3168 | |
cce855bc | 3169 | #if defined (ALIAS) || defined (DPAREN_ARITHMETIC) |
ccc6cda3 | 3170 | if (pushed_string_list) |
cce855bc JA |
3171 | free_string_list (); |
3172 | #endif /* ALIAS || DPAREN_ARITHMETIC */ | |
726f6388 | 3173 | |
a0c0a00f | 3174 | /* This is where we resynchronize to the next newline on error/reset */ |
ccc6cda3 JA |
3175 | if (shell_input_line) |
3176 | { | |
3177 | free (shell_input_line); | |
3178 | shell_input_line = (char *)NULL; | |
3179 | shell_input_line_size = shell_input_line_index = 0; | |
3180 | } | |
3181 | ||
3182 | FREE (word_desc_to_read); | |
3183 | word_desc_to_read = (WORD_DESC *)NULL; | |
3184 | ||
836a17be CR |
3185 | eol_ungetc_lookahead = 0; |
3186 | ||
89a92869 | 3187 | current_token = '\n'; /* XXX */ |
ccc6cda3 JA |
3188 | last_read_token = '\n'; |
3189 | token_to_read = '\n'; | |
3190 | } | |
3191 | ||
d233b485 CR |
3192 | void |
3193 | reset_readahead_token () | |
3194 | { | |
3195 | if (token_to_read == '\n') | |
3196 | token_to_read = 0; | |
3197 | } | |
3198 | ||
ccc6cda3 JA |
3199 | /* Read the next token. Command can be READ (normal operation) or |
3200 | RESET (to normalize state). */ | |
3201 | static int | |
3202 | read_token (command) | |
3203 | int command; | |
3204 | { | |
3205 | int character; /* Current character. */ | |
3206 | int peek_char; /* Temporary look-ahead character. */ | |
3207 | int result; /* The thing to return. */ | |
3208 | ||
3209 | if (command == RESET) | |
3210 | { | |
3211 | reset_parser (); | |
726f6388 JA |
3212 | return ('\n'); |
3213 | } | |
3214 | ||
3215 | if (token_to_read) | |
3216 | { | |
ccc6cda3 JA |
3217 | result = token_to_read; |
3218 | if (token_to_read == WORD || token_to_read == ASSIGNMENT_WORD) | |
d166f048 JA |
3219 | { |
3220 | yylval.word = word_desc_to_read; | |
3221 | word_desc_to_read = (WORD_DESC *)NULL; | |
3222 | } | |
726f6388 | 3223 | token_to_read = 0; |
ccc6cda3 | 3224 | return (result); |
726f6388 JA |
3225 | } |
3226 | ||
cce855bc JA |
3227 | #if defined (COND_COMMAND) |
3228 | if ((parser_state & (PST_CONDCMD|PST_CONDEXPR)) == PST_CONDCMD) | |
3229 | { | |
3230 | cond_lineno = line_number; | |
3231 | parser_state |= PST_CONDEXPR; | |
3232 | yylval.command = parse_cond_command (); | |
3233 | if (cond_token != COND_END) | |
3234 | { | |
7117c2d2 | 3235 | cond_error (); |
cce855bc JA |
3236 | return (-1); |
3237 | } | |
3238 | token_to_read = COND_END; | |
3239 | parser_state &= ~(PST_CONDEXPR|PST_CONDCMD); | |
3240 | return (COND_CMD); | |
3241 | } | |
3242 | #endif | |
3243 | ||
726f6388 | 3244 | #if defined (ALIAS) |
726f6388 JA |
3245 | /* This is a place to jump back to once we have successfully expanded a |
3246 | token with an alias and pushed the string with push_string () */ | |
3247 | re_read_token: | |
726f6388 JA |
3248 | #endif /* ALIAS */ |
3249 | ||
3250 | /* Read a single word from input. Start by skipping blanks. */ | |
0628567a | 3251 | while ((character = shell_getc (1)) != EOF && shellblank (character)) |
ccc6cda3 | 3252 | ; |
726f6388 JA |
3253 | |
3254 | if (character == EOF) | |
3255 | { | |
3256 | EOF_Reached = 1; | |
3257 | return (yacc_EOF); | |
3258 | } | |
3259 | ||
d233b485 CR |
3260 | /* If we hit the end of the string and we're not expanding an alias (e.g., |
3261 | we are eval'ing a string that is an incomplete command), return EOF */ | |
3262 | if (character == '\0' && bash_input.type == st_string && expanding_alias() == 0) | |
3263 | { | |
3264 | #if defined (DEBUG) | |
3265 | itrace("shell_getc: bash_input.location.string = `%s'", bash_input.location.string); | |
3266 | #endif | |
3267 | EOF_Reached = 1; | |
3268 | return (yacc_EOF); | |
3269 | } | |
3270 | ||
7117c2d2 | 3271 | if MBTEST(character == '#' && (!interactive || interactive_comments)) |
726f6388 JA |
3272 | { |
3273 | /* A comment. Discard until EOL or EOF, and then return a newline. */ | |
d233b485 | 3274 | parser_state |= PST_COMMENT; |
726f6388 JA |
3275 | discard_until ('\n'); |
3276 | shell_getc (0); | |
d233b485 | 3277 | parser_state &= ~PST_COMMENT; |
ccc6cda3 | 3278 | character = '\n'; /* this will take the next if statement and return. */ |
726f6388 JA |
3279 | } |
3280 | ||
3281 | if (character == '\n') | |
3282 | { | |
3283 | /* If we're about to return an unquoted newline, we can go and collect | |
3284 | the text of any pending here document. */ | |
3285 | if (need_here_doc) | |
3286 | gather_here_documents (); | |
3287 | ||
3288 | #if defined (ALIAS) | |
ccc6cda3 | 3289 | parser_state &= ~PST_ALEXPNEXT; |
726f6388 JA |
3290 | #endif /* ALIAS */ |
3291 | ||
95732b49 JA |
3292 | parser_state &= ~PST_ASSIGNOK; |
3293 | ||
726f6388 JA |
3294 | return (character); |
3295 | } | |
3296 | ||
f1be666c JA |
3297 | if (parser_state & PST_REGEXP) |
3298 | goto tokword; | |
3299 | ||
ccc6cda3 | 3300 | /* Shell meta-characters. */ |
7117c2d2 | 3301 | if MBTEST(shellmeta (character) && ((parser_state & PST_DBLPAREN) == 0)) |
726f6388 JA |
3302 | { |
3303 | #if defined (ALIAS) | |
3304 | /* Turn off alias tokenization iff this character sequence would | |
3305 | not leave us ready to read a command. */ | |
3306 | if (character == '<' || character == '>') | |
ccc6cda3 | 3307 | parser_state &= ~PST_ALEXPNEXT; |
726f6388 JA |
3308 | #endif /* ALIAS */ |
3309 | ||
95732b49 JA |
3310 | parser_state &= ~PST_ASSIGNOK; |
3311 | ||
a0c0a00f CR |
3312 | /* If we are parsing a command substitution and we have read a character |
3313 | that marks the end of it, don't bother to skip over quoted newlines | |
3314 | when we read the next token. We're just interested in a character | |
3315 | that will turn this into a two-character token, so we let the higher | |
3316 | layers deal with quoted newlines following the command substitution. */ | |
3317 | if ((parser_state & PST_CMDSUBST) && character == shell_eof_token) | |
3318 | peek_char = shell_getc (0); | |
3319 | else | |
3320 | peek_char = shell_getc (1); | |
3321 | ||
ccc6cda3 | 3322 | if (character == peek_char) |
726f6388 JA |
3323 | { |
3324 | switch (character) | |
3325 | { | |
ccc6cda3 | 3326 | case '<': |
726f6388 JA |
3327 | /* If '<' then we could be at "<<" or at "<<-". We have to |
3328 | look ahead one more character. */ | |
726f6388 | 3329 | peek_char = shell_getc (1); |
3185942a | 3330 | if MBTEST(peek_char == '-') |
726f6388 | 3331 | return (LESS_LESS_MINUS); |
3185942a | 3332 | else if MBTEST(peek_char == '<') |
7117c2d2 | 3333 | return (LESS_LESS_LESS); |
726f6388 JA |
3334 | else |
3335 | { | |
3336 | shell_ungetc (peek_char); | |
3337 | return (LESS_LESS); | |
3338 | } | |
3339 | ||
3340 | case '>': | |
3341 | return (GREATER_GREATER); | |
3342 | ||
3343 | case ';': | |
ccc6cda3 | 3344 | parser_state |= PST_CASEPAT; |
726f6388 | 3345 | #if defined (ALIAS) |
ccc6cda3 | 3346 | parser_state &= ~PST_ALEXPNEXT; |
726f6388 | 3347 | #endif /* ALIAS */ |
95732b49 | 3348 | |
3185942a JA |
3349 | peek_char = shell_getc (1); |
3350 | if MBTEST(peek_char == '&') | |
3351 | return (SEMI_SEMI_AND); | |
3352 | else | |
3353 | { | |
3354 | shell_ungetc (peek_char); | |
3355 | return (SEMI_SEMI); | |
3356 | } | |
726f6388 JA |
3357 | |
3358 | case '&': | |
3359 | return (AND_AND); | |
3360 | ||
3361 | case '|': | |
3362 | return (OR_OR); | |
ccc6cda3 | 3363 | |
bb70624e | 3364 | #if defined (DPAREN_ARITHMETIC) || defined (ARITH_FOR_COMMAND) |
ccc6cda3 | 3365 | case '(': /* ) */ |
7117c2d2 JA |
3366 | result = parse_dparen (character); |
3367 | if (result == -2) | |
3368 | break; | |
3369 | else | |
3370 | return result; | |
ccc6cda3 | 3371 | #endif |
726f6388 | 3372 | } |
726f6388 | 3373 | } |
7117c2d2 | 3374 | else if MBTEST(character == '<' && peek_char == '&') |
ccc6cda3 | 3375 | return (LESS_AND); |
7117c2d2 | 3376 | else if MBTEST(character == '>' && peek_char == '&') |
ccc6cda3 | 3377 | return (GREATER_AND); |
7117c2d2 | 3378 | else if MBTEST(character == '<' && peek_char == '>') |
ccc6cda3 | 3379 | return (LESS_GREATER); |
7117c2d2 | 3380 | else if MBTEST(character == '>' && peek_char == '|') |
ccc6cda3 | 3381 | return (GREATER_BAR); |
3185942a JA |
3382 | else if MBTEST(character == '&' && peek_char == '>') |
3383 | { | |
3384 | peek_char = shell_getc (1); | |
3385 | if MBTEST(peek_char == '>') | |
3386 | return (AND_GREATER_GREATER); | |
3387 | else | |
3388 | { | |
3389 | shell_ungetc (peek_char); | |
3390 | return (AND_GREATER); | |
3391 | } | |
3392 | } | |
3393 | else if MBTEST(character == '|' && peek_char == '&') | |
3394 | return (BAR_AND); | |
3395 | else if MBTEST(character == ';' && peek_char == '&') | |
3396 | { | |
3397 | parser_state |= PST_CASEPAT; | |
3398 | #if defined (ALIAS) | |
3399 | parser_state &= ~PST_ALEXPNEXT; | |
3400 | #endif /* ALIAS */ | |
3401 | return (SEMI_AND); | |
3402 | } | |
ccc6cda3 | 3403 | |
726f6388 JA |
3404 | shell_ungetc (peek_char); |
3405 | ||
3406 | /* If we look like we are reading the start of a function | |
3407 | definition, then let the reader know about it so that | |
3408 | we will do the right thing with `{'. */ | |
7117c2d2 | 3409 | if MBTEST(character == ')' && last_read_token == '(' && token_before_that == WORD) |
726f6388 | 3410 | { |
ccc6cda3 | 3411 | parser_state |= PST_ALLOWOPNBRC; |
726f6388 | 3412 | #if defined (ALIAS) |
ccc6cda3 | 3413 | parser_state &= ~PST_ALEXPNEXT; |
726f6388 | 3414 | #endif /* ALIAS */ |
ccc6cda3 | 3415 | function_dstart = line_number; |
726f6388 JA |
3416 | } |
3417 | ||
ccc6cda3 JA |
3418 | /* case pattern lists may be preceded by an optional left paren. If |
3419 | we're not trying to parse a case pattern list, the left paren | |
3420 | indicates a subshell. */ | |
7117c2d2 | 3421 | if MBTEST(character == '(' && (parser_state & PST_CASEPAT) == 0) /* ) */ |
ccc6cda3 JA |
3422 | parser_state |= PST_SUBSHELL; |
3423 | /*(*/ | |
7117c2d2 | 3424 | else if MBTEST((parser_state & PST_CASEPAT) && character == ')') |
28ef6c31 | 3425 | parser_state &= ~PST_CASEPAT; |
ccc6cda3 | 3426 | /*(*/ |
7117c2d2 | 3427 | else if MBTEST((parser_state & PST_SUBSHELL) && character == ')') |
ccc6cda3 | 3428 | parser_state &= ~PST_SUBSHELL; |
726f6388 JA |
3429 | |
3430 | #if defined (PROCESS_SUBSTITUTION) | |
3431 | /* Check for the constructs which introduce process substitution. | |
3432 | Shells running in `posix mode' don't do process substitution. */ | |
7117c2d2 | 3433 | if MBTEST(posixly_correct || ((character != '>' && character != '<') || peek_char != '(')) /*)*/ |
726f6388 JA |
3434 | #endif /* PROCESS_SUBSTITUTION */ |
3435 | return (character); | |
3436 | } | |
3437 | ||
7117c2d2 JA |
3438 | /* Hack <&- (close stdin) case. Also <&N- (dup and close). */ |
3439 | if MBTEST(character == '-' && (last_read_token == LESS_AND || last_read_token == GREATER_AND)) | |
ccc6cda3 JA |
3440 | return (character); |
3441 | ||
f1be666c | 3442 | tokword: |
726f6388 JA |
3443 | /* Okay, if we got this far, we have to read a word. Read one, |
3444 | and then check it against the known ones. */ | |
ccc6cda3 JA |
3445 | result = read_token_word (character); |
3446 | #if defined (ALIAS) | |
3447 | if (result == RE_READ_TOKEN) | |
3448 | goto re_read_token; | |
3449 | #endif | |
3450 | return result; | |
3451 | } | |
726f6388 | 3452 | |
7117c2d2 JA |
3453 | /* |
3454 | * Match a $(...) or other grouping construct. This has to handle embedded | |
3455 | * quoted strings ('', ``, "") and nested constructs. It also must handle | |
95732b49 JA |
3456 | * reprompting the user, if necessary, after reading a newline, and returning |
3457 | * correct error values if it reads EOF. | |
7117c2d2 | 3458 | */ |
495aee44 CR |
3459 | #define P_FIRSTCLOSE 0x0001 |
3460 | #define P_ALLOWESC 0x0002 | |
3461 | #define P_DQUOTE 0x0004 | |
3462 | #define P_COMMAND 0x0008 /* parsing a command, so look for comments */ | |
3463 | #define P_BACKQUOTE 0x0010 /* parsing a backquoted command substitution */ | |
3464 | #define P_ARRAYSUB 0x0020 /* parsing a [...] array subscript for assignment */ | |
3465 | #define P_DOLBRACE 0x0040 /* parsing a ${...} construct */ | |
b72432fd | 3466 | |
3185942a | 3467 | /* Lexical state while parsing a grouping construct or $(...). */ |
d233b485 CR |
3468 | #define LEX_WASDOL 0x0001 |
3469 | #define LEX_CKCOMMENT 0x0002 | |
3470 | #define LEX_INCOMMENT 0x0004 | |
3471 | #define LEX_PASSNEXT 0x0008 | |
3472 | #define LEX_RESWDOK 0x0010 | |
3473 | #define LEX_CKCASE 0x0020 | |
3474 | #define LEX_INCASE 0x0040 | |
3475 | #define LEX_INHEREDOC 0x0080 | |
3476 | #define LEX_HEREDELIM 0x0100 /* reading here-doc delimiter */ | |
3477 | #define LEX_STRIPDOC 0x0200 /* <<- strip tabs from here doc delim */ | |
3478 | #define LEX_QUOTEDDOC 0x0400 /* here doc with quoted delim */ | |
3479 | #define LEX_INWORD 0x0800 | |
3480 | #define LEX_GTLT 0x1000 | |
3185942a JA |
3481 | |
3482 | #define COMSUB_META(ch) ((ch) == ';' || (ch) == '&' || (ch) == '|') | |
3483 | ||
3484 | #define CHECK_NESTRET_ERROR() \ | |
3485 | do { \ | |
3486 | if (nestret == &matched_pair_error) \ | |
3487 | { \ | |
3488 | free (ret); \ | |
3489 | return &matched_pair_error; \ | |
3490 | } \ | |
3491 | } while (0) | |
3492 | ||
3493 | #define APPEND_NESTRET() \ | |
3494 | do { \ | |
3495 | if (nestlen) \ | |
3496 | { \ | |
3497 | RESIZE_MALLOCED_BUFFER (ret, retind, nestlen, retsize, 64); \ | |
3498 | strcpy (ret + retind, nestret); \ | |
3499 | retind += nestlen; \ | |
3500 | } \ | |
3501 | } while (0) | |
3502 | ||
ccc6cda3 | 3503 | static char matched_pair_error; |
3185942a | 3504 | |
ccc6cda3 JA |
3505 | static char * |
3506 | parse_matched_pair (qc, open, close, lenp, flags) | |
3507 | int qc; /* `"' if this construct is within double quotes */ | |
3508 | int open, close; | |
3509 | int *lenp, flags; | |
3510 | { | |
d233b485 | 3511 | int count, ch, prevch, tflags; |
3185942a | 3512 | int nestlen, ttranslen, start_lineno; |
28ef6c31 | 3513 | char *ret, *nestret, *ttrans; |
b80f6443 | 3514 | int retind, retsize, rflags; |
495aee44 CR |
3515 | int dolbrace_state; |
3516 | ||
3517 | dolbrace_state = (flags & P_DOLBRACE) ? DOLBRACE_PARAM : 0; | |
726f6388 | 3518 | |
0001803f | 3519 | /*itrace("parse_matched_pair[%d]: open = %c close = %c flags = %d", line_number, open, close, flags);*/ |
ccc6cda3 | 3520 | count = 1; |
3185942a JA |
3521 | tflags = 0; |
3522 | ||
3523 | if ((flags & P_COMMAND) && qc != '`' && qc != '\'' && qc != '"' && (flags & P_DQUOTE) == 0) | |
3524 | tflags |= LEX_CKCOMMENT; | |
726f6388 | 3525 | |
b80f6443 JA |
3526 | /* RFLAGS is the set of flags we want to pass to recursive calls. */ |
3527 | rflags = (qc == '"') ? P_DQUOTE : (flags & P_DQUOTE); | |
3528 | ||
f73dda09 | 3529 | ret = (char *)xmalloc (retsize = 64); |
ccc6cda3 | 3530 | retind = 0; |
726f6388 | 3531 | |
ccc6cda3 | 3532 | start_lineno = line_number; |
d233b485 | 3533 | ch = EOF; /* just in case */ |
ccc6cda3 JA |
3534 | while (count) |
3535 | { | |
d233b485 | 3536 | prevch = ch; |
495aee44 | 3537 | ch = shell_getc (qc != '\'' && (tflags & (LEX_PASSNEXT)) == 0); |
0628567a | 3538 | |
ccc6cda3 JA |
3539 | if (ch == EOF) |
3540 | { | |
3541 | free (ret); | |
b80f6443 | 3542 | parser_error (start_lineno, _("unexpected EOF while looking for matching `%c'"), close); |
ccc6cda3 JA |
3543 | EOF_Reached = 1; /* XXX */ |
3544 | return (&matched_pair_error); | |
3545 | } | |
726f6388 | 3546 | |
ccc6cda3 | 3547 | /* Possible reprompting. */ |
b80f6443 | 3548 | if (ch == '\n' && SHOULD_PROMPT ()) |
ccc6cda3 | 3549 | prompt_again (); |
726f6388 | 3550 | |
3185942a JA |
3551 | /* Don't bother counting parens or doing anything else if in a comment |
3552 | or part of a case statement */ | |
3553 | if (tflags & LEX_INCOMMENT) | |
95732b49 JA |
3554 | { |
3555 | /* Add this character. */ | |
3556 | RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64); | |
3557 | ret[retind++] = ch; | |
3558 | ||
3559 | if (ch == '\n') | |
3185942a | 3560 | tflags &= ~LEX_INCOMMENT; |
95732b49 JA |
3561 | |
3562 | continue; | |
3563 | } | |
3185942a | 3564 | |
0628567a JA |
3565 | /* Not exactly right yet, should handle shell metacharacters, too. If |
3566 | any changes are made to this test, make analogous changes to subst.c: | |
3567 | extract_delimited_string(). */ | |
3185942a JA |
3568 | else if MBTEST((tflags & LEX_CKCOMMENT) && (tflags & LEX_INCOMMENT) == 0 && ch == '#' && (retind == 0 || ret[retind-1] == '\n' || shellblank (ret[retind - 1]))) |
3569 | tflags |= LEX_INCOMMENT; | |
0628567a | 3570 | |
3185942a | 3571 | if (tflags & LEX_PASSNEXT) /* last char was backslash */ |
ccc6cda3 | 3572 | { |
3185942a | 3573 | tflags &= ~LEX_PASSNEXT; |
ccc6cda3 JA |
3574 | if (qc != '\'' && ch == '\n') /* double-quoted \<newline> disappears. */ |
3575 | { | |
3185942a JA |
3576 | if (retind > 0) |
3577 | retind--; /* swallow previously-added backslash */ | |
ccc6cda3 JA |
3578 | continue; |
3579 | } | |
726f6388 | 3580 | |
ccc6cda3 | 3581 | RESIZE_MALLOCED_BUFFER (ret, retind, 2, retsize, 64); |
ac50fbac | 3582 | if MBTEST(ch == CTLESC) |
ccc6cda3 JA |
3583 | ret[retind++] = CTLESC; |
3584 | ret[retind++] = ch; | |
3585 | continue; | |
3586 | } | |
3185942a JA |
3587 | /* If we're reparsing the input (e.g., from parse_string_to_word_list), |
3588 | we've already prepended CTLESC to single-quoted results of $'...'. | |
3589 | We may want to do this for other CTLESC-quoted characters in | |
3590 | reparse, too. */ | |
3591 | else if MBTEST((parser_state & PST_REPARSE) && open == '\'' && (ch == CTLESC || ch == CTLNUL)) | |
3592 | { | |
3593 | RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64); | |
3594 | ret[retind++] = ch; | |
3595 | continue; | |
3596 | } | |
7117c2d2 | 3597 | else if MBTEST(ch == CTLESC || ch == CTLNUL) /* special shell escapes */ |
ccc6cda3 JA |
3598 | { |
3599 | RESIZE_MALLOCED_BUFFER (ret, retind, 2, retsize, 64); | |
3600 | ret[retind++] = CTLESC; | |
3601 | ret[retind++] = ch; | |
3602 | continue; | |
3603 | } | |
7117c2d2 | 3604 | else if MBTEST(ch == close) /* ending delimiter */ |
ccc6cda3 | 3605 | count--; |
bb70624e | 3606 | /* handle nested ${...} specially. */ |
3185942a | 3607 | else if MBTEST(open != close && (tflags & LEX_WASDOL) && open == '{' && ch == open) /* } */ |
28ef6c31 | 3608 | count++; |
7117c2d2 | 3609 | else if MBTEST(((flags & P_FIRSTCLOSE) == 0) && ch == open) /* nested begin */ |
ccc6cda3 | 3610 | count++; |
726f6388 | 3611 | |
ccc6cda3 JA |
3612 | /* Add this character. */ |
3613 | RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64); | |
3614 | ret[retind++] = ch; | |
726f6388 | 3615 | |
3185942a JA |
3616 | /* If we just read the ending character, don't bother continuing. */ |
3617 | if (count == 0) | |
3618 | break; | |
3619 | ||
ccc6cda3 | 3620 | if (open == '\'') /* '' inside grouping construct */ |
bb70624e | 3621 | { |
7117c2d2 | 3622 | if MBTEST((flags & P_ALLOWESC) && ch == '\\') |
3185942a | 3623 | tflags |= LEX_PASSNEXT; |
bb70624e JA |
3624 | continue; |
3625 | } | |
726f6388 | 3626 | |
7117c2d2 | 3627 | if MBTEST(ch == '\\') /* backslashes */ |
3185942a JA |
3628 | tflags |= LEX_PASSNEXT; |
3629 | ||
495aee44 CR |
3630 | /* Based on which dolstate is currently in (param, op, or word), |
3631 | decide what the op is. We're really only concerned if it's % or | |
3632 | #, so we can turn on a flag that says whether or not we should | |
3633 | treat single quotes as special when inside a double-quoted | |
3634 | ${...}. This logic must agree with subst.c:extract_dollar_brace_string | |
3635 | since they share the same defines. */ | |
ac50fbac | 3636 | /* FLAG POSIX INTERP 221 */ |
495aee44 CR |
3637 | if (flags & P_DOLBRACE) |
3638 | { | |
3639 | /* ${param%[%]word} */ | |
3640 | if MBTEST(dolbrace_state == DOLBRACE_PARAM && ch == '%' && retind > 1) | |
3641 | dolbrace_state = DOLBRACE_QUOTE; | |
3642 | /* ${param#[#]word} */ | |
3643 | else if MBTEST(dolbrace_state == DOLBRACE_PARAM && ch == '#' && retind > 1) | |
3644 | dolbrace_state = DOLBRACE_QUOTE; | |
3645 | /* ${param/[/]pat/rep} */ | |
3646 | else if MBTEST(dolbrace_state == DOLBRACE_PARAM && ch == '/' && retind > 1) | |
ac50fbac | 3647 | dolbrace_state = DOLBRACE_QUOTE2; /* XXX */ |
495aee44 CR |
3648 | /* ${param^[^]pat} */ |
3649 | else if MBTEST(dolbrace_state == DOLBRACE_PARAM && ch == '^' && retind > 1) | |
3650 | dolbrace_state = DOLBRACE_QUOTE; | |
3651 | /* ${param,[,]pat} */ | |
3652 | else if MBTEST(dolbrace_state == DOLBRACE_PARAM && ch == ',' && retind > 1) | |
3653 | dolbrace_state = DOLBRACE_QUOTE; | |
3654 | else if MBTEST(dolbrace_state == DOLBRACE_PARAM && strchr ("#%^,~:-=?+/", ch) != 0) | |
3655 | dolbrace_state = DOLBRACE_OP; | |
3656 | else if MBTEST(dolbrace_state == DOLBRACE_OP && strchr ("#%^,~:-=?+/", ch) == 0) | |
3657 | dolbrace_state = DOLBRACE_WORD; | |
3658 | } | |
3659 | ||
3185942a | 3660 | /* The big hammer. Single quotes aren't special in double quotes. The |
495aee44 | 3661 | problem is that Posix used to say the single quotes are semi-special: |
3185942a JA |
3662 | within a double-quoted ${...} construct "an even number of |
3663 | unescaped double-quotes or single-quotes, if any, shall occur." */ | |
495aee44 | 3664 | /* This was changed in Austin Group Interp 221 */ |
bc63a081 | 3665 | if MBTEST(posixly_correct && shell_compatibility_level > 41 && dolbrace_state != DOLBRACE_QUOTE && dolbrace_state != DOLBRACE_QUOTE2 && (flags & P_DQUOTE) && (flags & P_DOLBRACE) && ch == '\'') |
3185942a | 3666 | continue; |
726f6388 | 3667 | |
3185942a JA |
3668 | /* Could also check open == '`' if we want to parse grouping constructs |
3669 | inside old-style command substitution. */ | |
ccc6cda3 JA |
3670 | if (open != close) /* a grouping construct */ |
3671 | { | |
7117c2d2 | 3672 | if MBTEST(shellquote (ch)) |
ccc6cda3 JA |
3673 | { |
3674 | /* '', ``, or "" inside $(...) or other grouping construct. */ | |
3675 | push_delimiter (dstack, ch); | |
3185942a | 3676 | if MBTEST((tflags & LEX_WASDOL) && ch == '\'') /* $'...' inside group */ |
b80f6443 | 3677 | nestret = parse_matched_pair (ch, ch, ch, &nestlen, P_ALLOWESC|rflags); |
28ef6c31 | 3678 | else |
b80f6443 | 3679 | nestret = parse_matched_pair (ch, ch, ch, &nestlen, rflags); |
ccc6cda3 | 3680 | pop_delimiter (dstack); |
3185942a JA |
3681 | CHECK_NESTRET_ERROR (); |
3682 | ||
3683 | if MBTEST((tflags & LEX_WASDOL) && ch == '\'' && (extended_quote || (rflags & P_DQUOTE) == 0)) | |
28ef6c31 JA |
3684 | { |
3685 | /* Translate $'...' here. */ | |
3686 | ttrans = ansiexpand (nestret, 0, nestlen - 1, &ttranslen); | |
d233b485 | 3687 | free (nestret); |
95732b49 | 3688 | |
ac50fbac CR |
3689 | /* If we're parsing a double-quoted brace expansion and we are |
3690 | not in a place where single quotes are treated specially, | |
3691 | make sure we single-quote the results of the ansi | |
3692 | expansion because quote removal should remove them later */ | |
3693 | /* FLAG POSIX INTERP 221 */ | |
3694 | if ((shell_compatibility_level > 42) && (rflags & P_DQUOTE) && (dolbrace_state == DOLBRACE_QUOTE2) && (flags & P_DOLBRACE)) | |
3695 | { | |
3696 | nestret = sh_single_quote (ttrans); | |
3697 | free (ttrans); | |
3698 | nestlen = strlen (nestret); | |
3699 | } | |
3700 | else if ((rflags & P_DQUOTE) == 0) | |
95732b49 JA |
3701 | { |
3702 | nestret = sh_single_quote (ttrans); | |
3703 | free (ttrans); | |
3704 | nestlen = strlen (nestret); | |
3705 | } | |
3706 | else | |
3707 | { | |
3708 | nestret = ttrans; | |
3709 | nestlen = ttranslen; | |
3710 | } | |
28ef6c31 JA |
3711 | retind -= 2; /* back up before the $' */ |
3712 | } | |
3185942a | 3713 | else if MBTEST((tflags & LEX_WASDOL) && ch == '"' && (extended_quote || (rflags & P_DQUOTE) == 0)) |
28ef6c31 JA |
3714 | { |
3715 | /* Locale expand $"..." here. */ | |
3716 | ttrans = localeexpand (nestret, 0, nestlen - 1, start_lineno, &ttranslen); | |
d233b485 | 3717 | free (nestret); |
95732b49 JA |
3718 | |
3719 | nestret = sh_mkdoublequoted (ttrans, ttranslen, 0); | |
28ef6c31 | 3720 | free (ttrans); |
95732b49 | 3721 | nestlen = ttranslen + 2; |
28ef6c31 JA |
3722 | retind -= 2; /* back up before the $" */ |
3723 | } | |
7117c2d2 | 3724 | |
3185942a | 3725 | APPEND_NESTRET (); |
ccc6cda3 JA |
3726 | FREE (nestret); |
3727 | } | |
a0c0a00f | 3728 | else if ((flags & (P_ARRAYSUB|P_DOLBRACE)) && (tflags & LEX_WASDOL) && (ch == '(' || ch == '{' || ch == '[')) /* ) } ] */ |
89a92869 | 3729 | goto parse_dollar_word; |
d233b485 CR |
3730 | #if defined (PROCESS_SUBSTITUTION) |
3731 | /* XXX - technically this should only be recognized at the start of | |
3732 | a word */ | |
3733 | else if ((flags & (P_ARRAYSUB|P_DOLBRACE)) && (tflags & LEX_GTLT) && (ch == '(')) /* ) */ | |
3734 | goto parse_dollar_word; | |
3735 | #endif | |
ccc6cda3 JA |
3736 | } |
3737 | /* Parse an old-style command substitution within double quotes as a | |
3738 | single word. */ | |
3739 | /* XXX - sh and ksh93 don't do this - XXX */ | |
7117c2d2 | 3740 | else if MBTEST(open == '"' && ch == '`') |
ccc6cda3 | 3741 | { |
b80f6443 | 3742 | nestret = parse_matched_pair (0, '`', '`', &nestlen, rflags); |
3185942a JA |
3743 | |
3744 | CHECK_NESTRET_ERROR (); | |
3745 | APPEND_NESTRET (); | |
3746 | ||
3747 | FREE (nestret); | |
3748 | } | |
3749 | else if MBTEST(open != '`' && (tflags & LEX_WASDOL) && (ch == '(' || ch == '{' || ch == '[')) /* ) } ] */ | |
3750 | /* check for $(), $[], or ${} inside quoted string. */ | |
3751 | { | |
89a92869 | 3752 | parse_dollar_word: |
3185942a JA |
3753 | if (open == ch) /* undo previous increment */ |
3754 | count--; | |
3755 | if (ch == '(') /* ) */ | |
3756 | nestret = parse_comsub (0, '(', ')', &nestlen, (rflags|P_COMMAND) & ~P_DQUOTE); | |
3757 | else if (ch == '{') /* } */ | |
495aee44 | 3758 | nestret = parse_matched_pair (0, '{', '}', &nestlen, P_FIRSTCLOSE|P_DOLBRACE|rflags); |
3185942a JA |
3759 | else if (ch == '[') /* ] */ |
3760 | nestret = parse_matched_pair (0, '[', ']', &nestlen, rflags); | |
3761 | ||
3762 | CHECK_NESTRET_ERROR (); | |
3763 | APPEND_NESTRET (); | |
3764 | ||
3765 | FREE (nestret); | |
3766 | } | |
d233b485 CR |
3767 | #if defined (PROCESS_SUBSTITUTION) |
3768 | if MBTEST((ch == '<' || ch == '>') && (tflags & LEX_GTLT) == 0) | |
3769 | tflags |= LEX_GTLT; | |
3770 | else | |
3771 | tflags &= ~LEX_GTLT; | |
3772 | #endif | |
3773 | if MBTEST(ch == '$' && (tflags & LEX_WASDOL) == 0) | |
3185942a JA |
3774 | tflags |= LEX_WASDOL; |
3775 | else | |
3776 | tflags &= ~LEX_WASDOL; | |
3777 | } | |
3778 | ||
3779 | ret[retind] = '\0'; | |
3780 | if (lenp) | |
3781 | *lenp = retind; | |
0001803f | 3782 | /*itrace("parse_matched_pair[%d]: returning %s", line_number, ret);*/ |
3185942a JA |
3783 | return ret; |
3784 | } | |
3785 | ||
a0c0a00f CR |
3786 | #if defined (DEBUG) |
3787 | static void | |
3788 | dump_tflags (flags) | |
3789 | int flags; | |
3790 | { | |
3791 | int f; | |
3792 | ||
3793 | f = flags; | |
3794 | fprintf (stderr, "%d -> ", f); | |
3795 | if (f & LEX_WASDOL) | |
3796 | { | |
3797 | f &= ~LEX_WASDOL; | |
3798 | fprintf (stderr, "LEX_WASDOL%s", f ? "|" : ""); | |
3799 | } | |
3800 | if (f & LEX_CKCOMMENT) | |
3801 | { | |
3802 | f &= ~LEX_CKCOMMENT; | |
3803 | fprintf (stderr, "LEX_CKCOMMENT%s", f ? "|" : ""); | |
3804 | } | |
3805 | if (f & LEX_INCOMMENT) | |
3806 | { | |
3807 | f &= ~LEX_INCOMMENT; | |
3808 | fprintf (stderr, "LEX_INCOMMENT%s", f ? "|" : ""); | |
3809 | } | |
3810 | if (f & LEX_PASSNEXT) | |
3811 | { | |
3812 | f &= ~LEX_PASSNEXT; | |
3813 | fprintf (stderr, "LEX_PASSNEXT%s", f ? "|" : ""); | |
3814 | } | |
3815 | if (f & LEX_RESWDOK) | |
3816 | { | |
3817 | f &= ~LEX_RESWDOK; | |
3818 | fprintf (stderr, "LEX_RESWDOK%s", f ? "|" : ""); | |
3819 | } | |
3820 | if (f & LEX_CKCASE) | |
3821 | { | |
3822 | f &= ~LEX_CKCASE; | |
3823 | fprintf (stderr, "LEX_CKCASE%s", f ? "|" : ""); | |
3824 | } | |
3825 | if (f & LEX_INCASE) | |
3826 | { | |
3827 | f &= ~LEX_INCASE; | |
3828 | fprintf (stderr, "LEX_INCASE%s", f ? "|" : ""); | |
3829 | } | |
3830 | if (f & LEX_INHEREDOC) | |
3831 | { | |
3832 | f &= ~LEX_INHEREDOC; | |
3833 | fprintf (stderr, "LEX_INHEREDOC%s", f ? "|" : ""); | |
3834 | } | |
3835 | if (f & LEX_HEREDELIM) | |
3836 | { | |
3837 | f &= ~LEX_HEREDELIM; | |
3838 | fprintf (stderr, "LEX_HEREDELIM%s", f ? "|" : ""); | |
3839 | } | |
3840 | if (f & LEX_STRIPDOC) | |
3841 | { | |
3842 | f &= ~LEX_STRIPDOC; | |
3843 | fprintf (stderr, "LEX_WASDOL%s", f ? "|" : ""); | |
3844 | } | |
3845 | if (f & LEX_QUOTEDDOC) | |
3846 | { | |
3847 | f &= ~LEX_QUOTEDDOC; | |
3848 | fprintf (stderr, "LEX_QUOTEDDOC%s", f ? "|" : ""); | |
3849 | } | |
3850 | if (f & LEX_INWORD) | |
3851 | { | |
3852 | f &= ~LEX_INWORD; | |
3853 | fprintf (stderr, "LEX_INWORD%s", f ? "|" : ""); | |
3854 | } | |
3855 | ||
3856 | fprintf (stderr, "\n"); | |
3857 | fflush (stderr); | |
3858 | } | |
3859 | #endif | |
3860 | ||
3185942a JA |
3861 | /* Parse a $(...) command substitution. This is messier than I'd like, and |
3862 | reproduces a lot more of the token-reading code than I'd like. */ | |
3863 | static char * | |
3864 | parse_comsub (qc, open, close, lenp, flags) | |
3865 | int qc; /* `"' if this construct is within double quotes */ | |
3866 | int open, close; | |
3867 | int *lenp, flags; | |
3868 | { | |
89a92869 | 3869 | int count, ch, peekc, tflags, lex_rwlen, lex_wlen, lex_firstind; |
3185942a JA |
3870 | int nestlen, ttranslen, start_lineno; |
3871 | char *ret, *nestret, *ttrans, *heredelim; | |
3872 | int retind, retsize, rflags, hdlen; | |
3873 | ||
495aee44 CR |
3874 | /* Posix interp 217 says arithmetic expressions have precedence, so |
3875 | assume $(( introduces arithmetic expansion and parse accordingly. */ | |
3876 | peekc = shell_getc (0); | |
3877 | shell_ungetc (peekc); | |
3878 | if (peekc == '(') | |
3879 | return (parse_matched_pair (qc, open, close, lenp, 0)); | |
3880 | ||
3185942a JA |
3881 | /*itrace("parse_comsub: qc = `%c' open = %c close = %c", qc, open, close);*/ |
3882 | count = 1; | |
3883 | tflags = LEX_RESWDOK; | |
3884 | ||
3885 | if ((flags & P_COMMAND) && qc != '\'' && qc != '"' && (flags & P_DQUOTE) == 0) | |
3886 | tflags |= LEX_CKCASE; | |
3887 | if ((tflags & LEX_CKCASE) && (interactive == 0 || interactive_comments)) | |
3888 | tflags |= LEX_CKCOMMENT; | |
3889 | ||
3890 | /* RFLAGS is the set of flags we want to pass to recursive calls. */ | |
3891 | rflags = (flags & P_DQUOTE); | |
3892 | ||
3893 | ret = (char *)xmalloc (retsize = 64); | |
3894 | retind = 0; | |
3895 | ||
3896 | start_lineno = line_number; | |
89a92869 | 3897 | lex_rwlen = lex_wlen = 0; |
3185942a JA |
3898 | |
3899 | heredelim = 0; | |
3900 | lex_firstind = -1; | |
3901 | ||
3902 | while (count) | |
3903 | { | |
3904 | comsub_readchar: | |
d233b485 | 3905 | ch = shell_getc (qc != '\'' && (tflags & (LEX_INCOMMENT|LEX_PASSNEXT|LEX_QUOTEDDOC)) == 0); |
3185942a JA |
3906 | |
3907 | if (ch == EOF) | |
3908 | { | |
3909 | eof_error: | |
3910 | free (ret); | |
3911 | FREE (heredelim); | |
3912 | parser_error (start_lineno, _("unexpected EOF while looking for matching `%c'"), close); | |
3913 | EOF_Reached = 1; /* XXX */ | |
3914 | return (&matched_pair_error); | |
3915 | } | |
3916 | ||
3917 | /* If we hit the end of a line and are reading the contents of a here | |
3918 | document, and it's not the same line that the document starts on, | |
3919 | check for this line being the here doc delimiter. Otherwise, if | |
3920 | we're in a here document, mark the next character as the beginning | |
3921 | of a line. */ | |
3922 | if (ch == '\n') | |
3923 | { | |
3924 | if ((tflags & LEX_HEREDELIM) && heredelim) | |
ccc6cda3 | 3925 | { |
3185942a JA |
3926 | tflags &= ~LEX_HEREDELIM; |
3927 | tflags |= LEX_INHEREDOC; | |
3928 | lex_firstind = retind + 1; | |
ccc6cda3 | 3929 | } |
3185942a | 3930 | else if (tflags & LEX_INHEREDOC) |
ccc6cda3 | 3931 | { |
3185942a JA |
3932 | int tind; |
3933 | tind = lex_firstind; | |
3934 | while ((tflags & LEX_STRIPDOC) && ret[tind] == '\t') | |
3935 | tind++; | |
d233b485 | 3936 | if (retind-tind == hdlen && STREQN (ret + tind, heredelim, hdlen)) |
3185942a | 3937 | { |
a0c0a00f | 3938 | tflags &= ~(LEX_STRIPDOC|LEX_INHEREDOC|LEX_QUOTEDDOC); |
3185942a | 3939 | /*itrace("parse_comsub:%d: found here doc end `%s'", line_number, ret + tind);*/ |
0001803f CR |
3940 | free (heredelim); |
3941 | heredelim = 0; | |
3185942a JA |
3942 | lex_firstind = -1; |
3943 | } | |
3944 | else | |
3945 | lex_firstind = retind + 1; | |
ccc6cda3 | 3946 | } |
ccc6cda3 | 3947 | } |
3185942a JA |
3948 | |
3949 | /* Possible reprompting. */ | |
3950 | if (ch == '\n' && SHOULD_PROMPT ()) | |
3951 | prompt_again (); | |
3952 | ||
0001803f CR |
3953 | /* XXX -- possibly allow here doc to be delimited by ending right |
3954 | paren. */ | |
3955 | if ((tflags & LEX_INHEREDOC) && ch == close && count == 1) | |
3956 | { | |
3957 | int tind; | |
a0c0a00f | 3958 | /*itrace("parse_comsub:%d: in here doc, ch == close, retind - firstind = %d hdlen = %d retind = %d", line_number, retind-lex_firstind, hdlen, retind);*/ |
0001803f CR |
3959 | tind = lex_firstind; |
3960 | while ((tflags & LEX_STRIPDOC) && ret[tind] == '\t') | |
3961 | tind++; | |
3962 | if (retind-tind == hdlen && STREQN (ret + tind, heredelim, hdlen)) | |
3963 | { | |
a0c0a00f CR |
3964 | tflags &= ~(LEX_STRIPDOC|LEX_INHEREDOC|LEX_QUOTEDDOC); |
3965 | /*itrace("parse_comsub:%d: found here doc end `%*s'", line_number, hdlen, ret + tind);*/ | |
0001803f CR |
3966 | free (heredelim); |
3967 | heredelim = 0; | |
3968 | lex_firstind = -1; | |
3969 | } | |
3970 | } | |
3971 | ||
a0c0a00f CR |
3972 | /* Don't bother counting parens or doing anything else if in a comment or |
3973 | here document (not exactly right for here-docs -- if we want to allow | |
3974 | recursive calls to parse_comsub to have their own here documents, | |
3975 | change the LEX_INHEREDOC to LEX_QUOTEDDOC here and uncomment the next | |
3976 | clause below. Note that to make this work completely, we need to make | |
3977 | additional changes to allow xparse_dolparen to work right when the | |
3978 | command substitution is parsed, because read_secondary_line doesn't know | |
3979 | to recursively parse through command substitutions embedded in here- | |
3980 | documents */ | |
3185942a JA |
3981 | if (tflags & (LEX_INCOMMENT|LEX_INHEREDOC)) |
3982 | { | |
3983 | /* Add this character. */ | |
3984 | RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64); | |
3985 | ret[retind++] = ch; | |
3986 | ||
3987 | if ((tflags & LEX_INCOMMENT) && ch == '\n') | |
ac50fbac | 3988 | { |
0001803f | 3989 | /*itrace("parse_comsub:%d: lex_incomment -> 0 ch = `%c'", line_number, ch);*/ |
ac50fbac CR |
3990 | tflags &= ~LEX_INCOMMENT; |
3991 | } | |
3185942a JA |
3992 | |
3993 | continue; | |
3994 | } | |
a0c0a00f CR |
3995 | #if 0 |
3996 | /* If we're going to recursively parse a command substitution inside a | |
3997 | here-document, make sure we call parse_comsub recursively below. See | |
3998 | above for additional caveats. */ | |
3999 | if ((tflags & LEX_INHEREDOC) && ((tflags & LEX_WASDOL) == 0 || ch != '(')) /*)*/ | |
4000 | { | |
4001 | /* Add this character. */ | |
4002 | RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64); | |
4003 | ret[retind++] = ch; | |
4004 | if MBTEST(ch == '$') | |
4005 | tflags |= LEX_WASDOL; | |
4006 | else | |
4007 | tflags &= ~LEX_WASDOL; | |
4008 | } | |
4009 | #endif | |
3185942a | 4010 | |
89a92869 CR |
4011 | if (tflags & LEX_PASSNEXT) /* last char was backslash */ |
4012 | { | |
4013 | /*itrace("parse_comsub:%d: lex_passnext -> 0 ch = `%c' (%d)", line_number, ch, __LINE__);*/ | |
4014 | tflags &= ~LEX_PASSNEXT; | |
4015 | if (qc != '\'' && ch == '\n') /* double-quoted \<newline> disappears. */ | |
4016 | { | |
4017 | if (retind > 0) | |
4018 | retind--; /* swallow previously-added backslash */ | |
4019 | continue; | |
4020 | } | |
4021 | ||
4022 | RESIZE_MALLOCED_BUFFER (ret, retind, 2, retsize, 64); | |
ac50fbac | 4023 | if MBTEST(ch == CTLESC) |
89a92869 CR |
4024 | ret[retind++] = CTLESC; |
4025 | ret[retind++] = ch; | |
4026 | continue; | |
4027 | } | |
4028 | ||
4029 | /* If this is a shell break character, we are not in a word. If not, | |
4030 | we either start or continue a word. */ | |
4031 | if MBTEST(shellbreak (ch)) | |
4032 | { | |
4033 | tflags &= ~LEX_INWORD; | |
4034 | /*itrace("parse_comsub:%d: lex_inword -> 0 ch = `%c' (%d)", line_number, ch, __LINE__);*/ | |
4035 | } | |
4036 | else | |
4037 | { | |
4038 | if (tflags & LEX_INWORD) | |
4039 | { | |
4040 | lex_wlen++; | |
4041 | /*itrace("parse_comsub:%d: lex_inword == 1 ch = `%c' lex_wlen = %d (%d)", line_number, ch, lex_wlen, __LINE__);*/ | |
4042 | } | |
4043 | else | |
4044 | { | |
4045 | /*itrace("parse_comsub:%d: lex_inword -> 1 ch = `%c' (%d)", line_number, ch, __LINE__);*/ | |
4046 | tflags |= LEX_INWORD; | |
4047 | lex_wlen = 0; | |
ae339e9c CR |
4048 | if (tflags & LEX_RESWDOK) |
4049 | lex_rwlen = 0; | |
89a92869 CR |
4050 | } |
4051 | } | |
4052 | ||
3185942a | 4053 | /* Skip whitespace */ |
495aee44 | 4054 | if MBTEST(shellblank (ch) && (tflags & LEX_HEREDELIM) == 0 && lex_rwlen == 0) |
3185942a JA |
4055 | { |
4056 | /* Add this character. */ | |
4057 | RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64); | |
4058 | ret[retind++] = ch; | |
4059 | continue; | |
4060 | } | |
4061 | ||
4062 | /* Either we are looking for the start of the here-doc delimiter | |
4063 | (lex_firstind == -1) or we are reading one (lex_firstind >= 0). | |
4064 | If this character is a shell break character and we are reading | |
4065 | the delimiter, save it and note that we are now reading a here | |
4066 | document. If we've found the start of the delimiter, note it by | |
4067 | setting lex_firstind. Backslashes can quote shell metacharacters | |
4068 | in here-doc delimiters. */ | |
4069 | if (tflags & LEX_HEREDELIM) | |
4070 | { | |
4071 | if (lex_firstind == -1 && shellbreak (ch) == 0) | |
4072 | lex_firstind = retind; | |
0001803f CR |
4073 | #if 0 |
4074 | else if (heredelim && (tflags & LEX_PASSNEXT) == 0 && ch == '\n') | |
4075 | { | |
4076 | tflags |= LEX_INHEREDOC; | |
4077 | tflags &= ~LEX_HEREDELIM; | |
4078 | lex_firstind = retind + 1; | |
4079 | } | |
4080 | #endif | |
3185942a JA |
4081 | else if (lex_firstind >= 0 && (tflags & LEX_PASSNEXT) == 0 && shellbreak (ch)) |
4082 | { | |
0001803f CR |
4083 | if (heredelim == 0) |
4084 | { | |
4085 | nestret = substring (ret, lex_firstind, retind); | |
4086 | heredelim = string_quote_removal (nestret, 0); | |
0001803f | 4087 | hdlen = STRLEN(heredelim); |
3185942a | 4088 | /*itrace("parse_comsub:%d: found here doc delimiter `%s' (%d)", line_number, heredelim, hdlen);*/ |
a0c0a00f CR |
4089 | if (STREQ (heredelim, nestret) == 0) |
4090 | tflags |= LEX_QUOTEDDOC; | |
4091 | free (nestret); | |
0001803f | 4092 | } |
3185942a JA |
4093 | if (ch == '\n') |
4094 | { | |
4095 | tflags |= LEX_INHEREDOC; | |
4096 | tflags &= ~LEX_HEREDELIM; | |
4097 | lex_firstind = retind + 1; | |
4098 | } | |
4099 | else | |
4100 | lex_firstind = -1; | |
4101 | } | |
4102 | } | |
4103 | ||
4104 | /* Meta-characters that can introduce a reserved word. Not perfect yet. */ | |
89a92869 | 4105 | if MBTEST((tflags & LEX_RESWDOK) == 0 && (tflags & LEX_CKCASE) && (tflags & LEX_INCOMMENT) == 0 && (shellmeta(ch) || ch == '\n')) |
95732b49 | 4106 | { |
3185942a JA |
4107 | /* Add this character. */ |
4108 | RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64); | |
4109 | ret[retind++] = ch; | |
4110 | peekc = shell_getc (1); | |
4111 | if (ch == peekc && (ch == '&' || ch == '|' || ch == ';')) /* two-character tokens */ | |
4112 | { | |
4113 | RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64); | |
4114 | ret[retind++] = peekc; | |
0001803f | 4115 | /*itrace("parse_comsub:%d: set lex_reswordok = 1, ch = `%c'", line_number, ch);*/ |
3185942a JA |
4116 | tflags |= LEX_RESWDOK; |
4117 | lex_rwlen = 0; | |
4118 | continue; | |
4119 | } | |
4120 | else if (ch == '\n' || COMSUB_META(ch)) | |
4121 | { | |
4122 | shell_ungetc (peekc); | |
3185942a | 4123 | /*itrace("parse_comsub:%d: set lex_reswordok = 1, ch = `%c'", line_number, ch);*/ |
0001803f | 4124 | tflags |= LEX_RESWDOK; |
3185942a JA |
4125 | lex_rwlen = 0; |
4126 | continue; | |
4127 | } | |
4128 | else if (ch == EOF) | |
4129 | goto eof_error; | |
4130 | else | |
4131 | { | |
4132 | /* `unget' the character we just added and fall through */ | |
4133 | retind--; | |
4134 | shell_ungetc (peekc); | |
4135 | } | |
95732b49 | 4136 | } |
3185942a JA |
4137 | |
4138 | /* If we can read a reserved word, try to read one. */ | |
4139 | if (tflags & LEX_RESWDOK) | |
4140 | { | |
a0c0a00f | 4141 | if MBTEST(islower ((unsigned char)ch)) |
3185942a JA |
4142 | { |
4143 | /* Add this character. */ | |
4144 | RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64); | |
4145 | ret[retind++] = ch; | |
4146 | lex_rwlen++; | |
4147 | continue; | |
4148 | } | |
4149 | else if MBTEST(lex_rwlen == 4 && shellbreak (ch)) | |
4150 | { | |
4151 | if (STREQN (ret + retind - 4, "case", 4)) | |
ac50fbac CR |
4152 | { |
4153 | tflags |= LEX_INCASE; | |
a0c0a00f | 4154 | tflags &= ~LEX_RESWDOK; |
0001803f | 4155 | /*itrace("parse_comsub:%d: found `case', lex_incase -> 1 lex_reswdok -> 0", line_number);*/ |
ac50fbac | 4156 | } |
3185942a | 4157 | else if (STREQN (ret + retind - 4, "esac", 4)) |
ac50fbac CR |
4158 | { |
4159 | tflags &= ~LEX_INCASE; | |
a0c0a00f CR |
4160 | /*itrace("parse_comsub:%d: found `esac', lex_incase -> 0 lex_reswdok -> 1", line_number);*/ |
4161 | tflags |= LEX_RESWDOK; | |
4162 | lex_rwlen = 0; | |
4163 | } | |
4164 | else if (STREQN (ret + retind - 4, "done", 4) || | |
4165 | STREQN (ret + retind - 4, "then", 4) || | |
4166 | STREQN (ret + retind - 4, "else", 4) || | |
4167 | STREQN (ret + retind - 4, "elif", 4) || | |
4168 | STREQN (ret + retind - 4, "time", 4)) | |
4169 | { | |
4170 | /* these are four-character reserved words that can be | |
4171 | followed by a reserved word; anything else turns off | |
4172 | the reserved-word-ok flag */ | |
4173 | /*itrace("parse_comsub:%d: found `%.4s', lex_reswdok -> 1", line_number, ret+retind-4);*/ | |
4174 | tflags |= LEX_RESWDOK; | |
4175 | lex_rwlen = 0; | |
4176 | } | |
d233b485 | 4177 | else if (shellmeta (ch) == 0) |
a0c0a00f CR |
4178 | { |
4179 | tflags &= ~LEX_RESWDOK; | |
4180 | /*itrace("parse_comsub:%d: found `%.4s', lex_reswdok -> 0", line_number, ret+retind-4);*/ | |
ac50fbac | 4181 | } |
d233b485 CR |
4182 | else /* can't be in a reserved word any more */ |
4183 | lex_rwlen = 0; | |
3185942a | 4184 | } |
89a92869 CR |
4185 | else if MBTEST((tflags & LEX_CKCOMMENT) && ch == '#' && (lex_rwlen == 0 || ((tflags & LEX_INWORD) && lex_wlen == 0))) |
4186 | ; /* don't modify LEX_RESWDOK if we're starting a comment */ | |
ac50fbac CR |
4187 | /* Allow `do' followed by space, tab, or newline to preserve the |
4188 | RESWDOK flag, but reset the reserved word length counter so we | |
4189 | can read another one. */ | |
4190 | else if MBTEST(((tflags & LEX_INCASE) == 0) && | |
a0c0a00f | 4191 | (isblank((unsigned char)ch) || ch == '\n') && |
ac50fbac CR |
4192 | lex_rwlen == 2 && |
4193 | STREQN (ret + retind - 2, "do", 2)) | |
4194 | { | |
a0c0a00f | 4195 | /*itrace("parse_comsub:%d: lex_incase == 0 found `%c', found \"do\"", line_number, ch);*/ |
ac50fbac CR |
4196 | lex_rwlen = 0; |
4197 | } | |
89a92869 CR |
4198 | else if MBTEST((tflags & LEX_INCASE) && ch != '\n') |
4199 | /* If we can read a reserved word and we're in case, we're at the | |
4200 | point where we can read a new pattern list or an esac. We | |
4201 | handle the esac case above. If we read a newline, we want to | |
4202 | leave LEX_RESWDOK alone. If we read anything else, we want to | |
4203 | turn off LEX_RESWDOK, since we're going to read a pattern list. */ | |
ac50fbac CR |
4204 | { |
4205 | tflags &= ~LEX_RESWDOK; | |
89a92869 | 4206 | /*itrace("parse_comsub:%d: lex_incase == 1 found `%c', lex_reswordok -> 0", line_number, ch);*/ |
ac50fbac | 4207 | } |
89a92869 | 4208 | else if MBTEST(shellbreak (ch) == 0) |
ac50fbac CR |
4209 | { |
4210 | tflags &= ~LEX_RESWDOK; | |
3185942a | 4211 | /*itrace("parse_comsub:%d: found `%c', lex_reswordok -> 0", line_number, ch);*/ |
ac50fbac CR |
4212 | } |
4213 | #if 0 | |
4214 | /* If we find a space or tab but have read something and it's not | |
4215 | `do', turn off the reserved-word-ok flag */ | |
a0c0a00f | 4216 | else if MBTEST(isblank ((unsigned char)ch) && lex_rwlen > 0) |
ac50fbac CR |
4217 | { |
4218 | tflags &= ~LEX_RESWDOK; | |
4219 | /*itrace("parse_comsub:%d: found `%c', lex_reswordok -> 0", line_number, ch);*/ | |
4220 | } | |
4221 | #endif | |
3185942a JA |
4222 | } |
4223 | ||
0001803f | 4224 | /* Might be the start of a here-doc delimiter */ |
3185942a JA |
4225 | if MBTEST((tflags & LEX_INCOMMENT) == 0 && (tflags & LEX_CKCASE) && ch == '<') |
4226 | { | |
4227 | /* Add this character. */ | |
4228 | RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64); | |
4229 | ret[retind++] = ch; | |
4230 | peekc = shell_getc (1); | |
4231 | if (peekc == EOF) | |
4232 | goto eof_error; | |
4233 | if (peekc == ch) | |
4234 | { | |
4235 | RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64); | |
4236 | ret[retind++] = peekc; | |
4237 | peekc = shell_getc (1); | |
4238 | if (peekc == EOF) | |
4239 | goto eof_error; | |
4240 | if (peekc == '-') | |
4241 | { | |
4242 | RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64); | |
4243 | ret[retind++] = peekc; | |
4244 | tflags |= LEX_STRIPDOC; | |
4245 | } | |
4246 | else | |
4247 | shell_ungetc (peekc); | |
89a92869 CR |
4248 | if (peekc != '<') |
4249 | { | |
4250 | tflags |= LEX_HEREDELIM; | |
4251 | lex_firstind = -1; | |
4252 | } | |
3185942a JA |
4253 | continue; |
4254 | } | |
4255 | else | |
d233b485 CR |
4256 | { |
4257 | shell_ungetc (peekc); /* not a here-doc, start over */ | |
4258 | continue; | |
4259 | } | |
3185942a | 4260 | } |
89a92869 | 4261 | else if MBTEST((tflags & LEX_CKCOMMENT) && (tflags & LEX_INCOMMENT) == 0 && ch == '#' && (((tflags & LEX_RESWDOK) && lex_rwlen == 0) || ((tflags & LEX_INWORD) && lex_wlen == 0))) |
ac50fbac | 4262 | { |
89a92869 | 4263 | /*itrace("parse_comsub:%d: lex_incomment -> 1 (%d)", line_number, __LINE__);*/ |
ac50fbac CR |
4264 | tflags |= LEX_INCOMMENT; |
4265 | } | |
3185942a | 4266 | |
89a92869 | 4267 | if MBTEST(ch == CTLESC || ch == CTLNUL) /* special shell escapes */ |
3185942a JA |
4268 | { |
4269 | RESIZE_MALLOCED_BUFFER (ret, retind, 2, retsize, 64); | |
4270 | ret[retind++] = CTLESC; | |
4271 | ret[retind++] = ch; | |
4272 | continue; | |
4273 | } | |
4274 | #if 0 | |
4275 | else if MBTEST((tflags & LEX_INCASE) && ch == close && close == ')') | |
4276 | tflags &= ~LEX_INCASE; /* XXX */ | |
0628567a | 4277 | #endif |
3185942a | 4278 | else if MBTEST(ch == close && (tflags & LEX_INCASE) == 0) /* ending delimiter */ |
ac50fbac CR |
4279 | { |
4280 | count--; | |
3185942a | 4281 | /*itrace("parse_comsub:%d: found close: count = %d", line_number, count);*/ |
ac50fbac | 4282 | } |
3185942a | 4283 | else if MBTEST(((flags & P_FIRSTCLOSE) == 0) && (tflags & LEX_INCASE) == 0 && ch == open) /* nested begin */ |
ac50fbac CR |
4284 | { |
4285 | count++; | |
0001803f | 4286 | /*itrace("parse_comsub:%d: found open: count = %d", line_number, count);*/ |
ac50fbac | 4287 | } |
3185942a JA |
4288 | |
4289 | /* Add this character. */ | |
4290 | RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64); | |
4291 | ret[retind++] = ch; | |
4292 | ||
4293 | /* If we just read the ending character, don't bother continuing. */ | |
4294 | if (count == 0) | |
4295 | break; | |
4296 | ||
4297 | if MBTEST(ch == '\\') /* backslashes */ | |
4298 | tflags |= LEX_PASSNEXT; | |
4299 | ||
4300 | if MBTEST(shellquote (ch)) | |
4301 | { | |
4302 | /* '', ``, or "" inside $(...). */ | |
4303 | push_delimiter (dstack, ch); | |
4304 | if MBTEST((tflags & LEX_WASDOL) && ch == '\'') /* $'...' inside group */ | |
4305 | nestret = parse_matched_pair (ch, ch, ch, &nestlen, P_ALLOWESC|rflags); | |
4306 | else | |
4307 | nestret = parse_matched_pair (ch, ch, ch, &nestlen, rflags); | |
4308 | pop_delimiter (dstack); | |
4309 | CHECK_NESTRET_ERROR (); | |
4310 | ||
4311 | if MBTEST((tflags & LEX_WASDOL) && ch == '\'' && (extended_quote || (rflags & P_DQUOTE) == 0)) | |
4312 | { | |
4313 | /* Translate $'...' here. */ | |
4314 | ttrans = ansiexpand (nestret, 0, nestlen - 1, &ttranslen); | |
d233b485 | 4315 | free (nestret); |
3185942a JA |
4316 | |
4317 | if ((rflags & P_DQUOTE) == 0) | |
4318 | { | |
4319 | nestret = sh_single_quote (ttrans); | |
4320 | free (ttrans); | |
4321 | nestlen = strlen (nestret); | |
4322 | } | |
4323 | else | |
4324 | { | |
4325 | nestret = ttrans; | |
4326 | nestlen = ttranslen; | |
4327 | } | |
4328 | retind -= 2; /* back up before the $' */ | |
4329 | } | |
4330 | else if MBTEST((tflags & LEX_WASDOL) && ch == '"' && (extended_quote || (rflags & P_DQUOTE) == 0)) | |
4331 | { | |
4332 | /* Locale expand $"..." here. */ | |
4333 | ttrans = localeexpand (nestret, 0, nestlen - 1, start_lineno, &ttranslen); | |
d233b485 | 4334 | free (nestret); |
3185942a JA |
4335 | |
4336 | nestret = sh_mkdoublequoted (ttrans, ttranslen, 0); | |
4337 | free (ttrans); | |
4338 | nestlen = ttranslen + 2; | |
4339 | retind -= 2; /* back up before the $" */ | |
4340 | } | |
4341 | ||
4342 | APPEND_NESTRET (); | |
4343 | FREE (nestret); | |
4344 | } | |
4345 | else if MBTEST((tflags & LEX_WASDOL) && (ch == '(' || ch == '{' || ch == '[')) /* ) } ] */ | |
4346 | /* check for $(), $[], or ${} inside command substitution. */ | |
ccc6cda3 | 4347 | { |
3185942a | 4348 | if ((tflags & LEX_INCASE) == 0 && open == ch) /* undo previous increment */ |
ccc6cda3 JA |
4349 | count--; |
4350 | if (ch == '(') /* ) */ | |
3185942a | 4351 | nestret = parse_comsub (0, '(', ')', &nestlen, (rflags|P_COMMAND) & ~P_DQUOTE); |
ccc6cda3 | 4352 | else if (ch == '{') /* } */ |
495aee44 | 4353 | nestret = parse_matched_pair (0, '{', '}', &nestlen, P_FIRSTCLOSE|P_DOLBRACE|rflags); |
ccc6cda3 | 4354 | else if (ch == '[') /* ] */ |
b80f6443 | 4355 | nestret = parse_matched_pair (0, '[', ']', &nestlen, rflags); |
95732b49 | 4356 | |
3185942a JA |
4357 | CHECK_NESTRET_ERROR (); |
4358 | APPEND_NESTRET (); | |
4359 | ||
4360 | FREE (nestret); | |
ccc6cda3 | 4361 | } |
d233b485 | 4362 | if MBTEST(ch == '$' && (tflags & LEX_WASDOL) == 0) |
3185942a JA |
4363 | tflags |= LEX_WASDOL; |
4364 | else | |
4365 | tflags &= ~LEX_WASDOL; | |
ccc6cda3 | 4366 | } |
726f6388 | 4367 | |
3185942a | 4368 | FREE (heredelim); |
ccc6cda3 JA |
4369 | ret[retind] = '\0'; |
4370 | if (lenp) | |
4371 | *lenp = retind; | |
3185942a JA |
4372 | /*itrace("parse_comsub:%d: returning `%s'", line_number, ret);*/ |
4373 | return ret; | |
4374 | } | |
4375 | ||
495aee44 | 4376 | /* Recursively call the parser to parse a $(...) command substitution. */ |
3185942a JA |
4377 | char * |
4378 | xparse_dolparen (base, string, indp, flags) | |
4379 | char *base; | |
4380 | char *string; | |
4381 | int *indp; | |
4382 | int flags; | |
4383 | { | |
4384 | sh_parser_state_t ps; | |
b4839c27 | 4385 | sh_input_line_state_t ls; |
ac50fbac | 4386 | int orig_ind, nc, sflags, orig_eof_token; |
d233b485 CR |
4387 | char *ret, *ep, *ostring; |
4388 | #if defined (ALIAS) || defined (DPAREN_ARITHMETIC) | |
4389 | STRING_SAVER *saved_pushed_strings; | |
4390 | #endif | |
3185942a | 4391 | |
d233b485 | 4392 | /*debug_parser(1);*/ |
3185942a JA |
4393 | orig_ind = *indp; |
4394 | ostring = string; | |
4395 | ||
d233b485 CR |
4396 | if (*string == 0) |
4397 | { | |
4398 | if (flags & SX_NOALLOC) | |
4399 | return (char *)NULL; | |
4400 | ||
4401 | ret = xmalloc (1); | |
4402 | ret[0] = '\0'; | |
4403 | return ret; | |
4404 | } | |
4405 | ||
b4839c27 | 4406 | /*itrace("xparse_dolparen: size = %d shell_input_line = `%s'", shell_input_line_size, shell_input_line);*/ |
3185942a JA |
4407 | sflags = SEVAL_NONINT|SEVAL_NOHIST|SEVAL_NOFREE; |
4408 | if (flags & SX_NOLONGJMP) | |
4409 | sflags |= SEVAL_NOLONGJMP; | |
4410 | save_parser_state (&ps); | |
b4839c27 | 4411 | save_input_line_state (&ls); |
ac50fbac | 4412 | orig_eof_token = shell_eof_token; |
d233b485 CR |
4413 | #if defined (ALIAS) || defined (DPAREN_ARITHMETIC) |
4414 | saved_pushed_strings = pushed_string_list; /* separate parsing context */ | |
4415 | pushed_string_list = (STRING_SAVER *)NULL; | |
4416 | #endif | |
3185942a JA |
4417 | |
4418 | /*(*/ | |
4419 | parser_state |= PST_CMDSUBST|PST_EOFTOKEN; /* allow instant ')' */ /*(*/ | |
4420 | shell_eof_token = ')'; | |
a0c0a00f | 4421 | |
d233b485 CR |
4422 | /* Should we save and restore the bison/yacc lookahead token (yychar) here? |
4423 | Or only if it's not YYEMPTY? */ | |
4424 | ||
a0c0a00f | 4425 | nc = parse_string (string, "command substitution", sflags, &ep); |
3185942a | 4426 | |
d233b485 CR |
4427 | if (current_token == shell_eof_token) |
4428 | yyclearin; /* might want to clear lookahead token unconditionally */ | |
4429 | ||
ac50fbac | 4430 | shell_eof_token = orig_eof_token; |
3185942a JA |
4431 | restore_parser_state (&ps); |
4432 | reset_parser (); | |
b4839c27 CR |
4433 | /* reset_parser clears shell_input_line and associated variables */ |
4434 | restore_input_line_state (&ls); | |
ca6a2ba4 | 4435 | |
d233b485 CR |
4436 | #if defined (ALIAS) || defined (DPAREN_ARITHMETIC) |
4437 | pushed_string_list = saved_pushed_strings; | |
4438 | #endif | |
4439 | ||
ca6a2ba4 | 4440 | token_to_read = 0; |
3185942a | 4441 | |
a0c0a00f | 4442 | /* If parse_string returns < 0, we need to jump to top level with the |
d233b485 CR |
4443 | negative of the return value. We abandon the rest of this input line |
4444 | first */ | |
a0c0a00f | 4445 | if (nc < 0) |
d233b485 CR |
4446 | { |
4447 | clear_shell_input_line (); /* XXX */ | |
4448 | jump_to_top_level (-nc); /* XXX */ | |
4449 | } | |
a0c0a00f | 4450 | |
3185942a JA |
4451 | /* Need to find how many characters parse_and_execute consumed, update |
4452 | *indp, if flags != 0, copy the portion of the string parsed into RET | |
d233b485 | 4453 | and return it. If flags & 1 (SX_NOALLOC) we can return NULL. */ |
3185942a JA |
4454 | |
4455 | /*(*/ | |
4456 | if (ep[-1] != ')') | |
4457 | { | |
4458 | #if DEBUG | |
4459 | if (ep[-1] != '\n') | |
4460 | itrace("xparse_dolparen:%d: ep[-1] != RPAREN (%d), ep = `%s'", line_number, ep[-1], ep); | |
4461 | #endif | |
4462 | while (ep > ostring && ep[-1] == '\n') ep--; | |
4463 | } | |
4464 | ||
4465 | nc = ep - ostring; | |
4466 | *indp = ep - base - 1; | |
4467 | ||
4468 | /*(*/ | |
4469 | #if DEBUG | |
4470 | if (base[*indp] != ')') | |
4471 | itrace("xparse_dolparen:%d: base[%d] != RPAREN (%d), base = `%s'", line_number, *indp, base[*indp], base); | |
d233b485 CR |
4472 | if (*indp < orig_ind) |
4473 | itrace("xparse_dolparen:%d: *indp (%d) < orig_ind (%d), orig_string = `%s'", line_number, *indp, orig_ind, ostring); | |
3185942a JA |
4474 | #endif |
4475 | ||
4476 | if (flags & SX_NOALLOC) | |
4477 | return (char *)NULL; | |
4478 | ||
4479 | if (nc == 0) | |
4480 | { | |
4481 | ret = xmalloc (1); | |
4482 | ret[0] = '\0'; | |
4483 | } | |
4484 | else | |
4485 | ret = substring (ostring, 0, nc - 1); | |
4486 | ||
ccc6cda3 JA |
4487 | return ret; |
4488 | } | |
726f6388 | 4489 | |
bb70624e | 4490 | #if defined (DPAREN_ARITHMETIC) || defined (ARITH_FOR_COMMAND) |
7117c2d2 JA |
4491 | /* Parse a double-paren construct. It can be either an arithmetic |
4492 | command, an arithmetic `for' command, or a nested subshell. Returns | |
4493 | the parsed token, -1 on error, or -2 if we didn't do anything and | |
4494 | should just go on. */ | |
4495 | static int | |
4496 | parse_dparen (c) | |
4497 | int c; | |
4498 | { | |
0628567a JA |
4499 | int cmdtyp, sline; |
4500 | char *wval; | |
7117c2d2 JA |
4501 | WORD_DESC *wd; |
4502 | ||
4503 | #if defined (ARITH_FOR_COMMAND) | |
4504 | if (last_read_token == FOR) | |
4505 | { | |
4506 | arith_for_lineno = line_number; | |
b80f6443 | 4507 | cmdtyp = parse_arith_cmd (&wval, 0); |
7117c2d2 JA |
4508 | if (cmdtyp == 1) |
4509 | { | |
95732b49 JA |
4510 | wd = alloc_word_desc (); |
4511 | wd->word = wval; | |
7117c2d2 | 4512 | yylval.word_list = make_word_list (wd, (WORD_LIST *)NULL); |
7117c2d2 JA |
4513 | return (ARITH_FOR_EXPRS); |
4514 | } | |
4515 | else | |
4516 | return -1; /* ERROR */ | |
4517 | } | |
4518 | #endif | |
4519 | ||
4520 | #if defined (DPAREN_ARITHMETIC) | |
4521 | if (reserved_word_acceptable (last_read_token)) | |
4522 | { | |
4523 | sline = line_number; | |
95732b49 | 4524 | |
b80f6443 | 4525 | cmdtyp = parse_arith_cmd (&wval, 0); |
7117c2d2 JA |
4526 | if (cmdtyp == 1) /* arithmetic command */ |
4527 | { | |
95732b49 JA |
4528 | wd = alloc_word_desc (); |
4529 | wd->word = wval; | |
4530 | wd->flags = W_QUOTED|W_NOSPLIT|W_NOGLOB|W_DQUOTE; | |
7117c2d2 | 4531 | yylval.word_list = make_word_list (wd, (WORD_LIST *)NULL); |
7117c2d2 JA |
4532 | return (ARITH_CMD); |
4533 | } | |
4534 | else if (cmdtyp == 0) /* nested subshell */ | |
4535 | { | |
4536 | push_string (wval, 0, (alias_t *)NULL); | |
ac50fbac | 4537 | pushed_string_list->flags = PSH_DPAREN; |
7117c2d2 JA |
4538 | if ((parser_state & PST_CASEPAT) == 0) |
4539 | parser_state |= PST_SUBSHELL; | |
4540 | return (c); | |
4541 | } | |
4542 | else /* ERROR */ | |
4543 | return -1; | |
4544 | } | |
4545 | #endif | |
4546 | ||
4547 | return -2; /* XXX */ | |
4548 | } | |
4549 | ||
d166f048 JA |
4550 | /* We've seen a `(('. Look for the matching `))'. If we get it, return 1. |
4551 | If not, assume it's a nested subshell for backwards compatibility and | |
4552 | return 0. In any case, put the characters we've consumed into a locally- | |
4553 | allocated buffer and make *ep point to that buffer. Return -1 on an | |
4554 | error, for example EOF. */ | |
4555 | static int | |
b80f6443 | 4556 | parse_arith_cmd (ep, adddq) |
d166f048 | 4557 | char **ep; |
b80f6443 | 4558 | int adddq; |
d166f048 JA |
4559 | { |
4560 | int exp_lineno, rval, c; | |
f73dda09 | 4561 | char *ttok, *tokstr; |
d166f048 JA |
4562 | int ttoklen; |
4563 | ||
4564 | exp_lineno = line_number; | |
4565 | ttok = parse_matched_pair (0, '(', ')', &ttoklen, 0); | |
4566 | rval = 1; | |
4567 | if (ttok == &matched_pair_error) | |
4568 | return -1; | |
4569 | /* Check that the next character is the closing right paren. If | |
4570 | not, this is a syntax error. ( */ | |
7117c2d2 JA |
4571 | c = shell_getc (0); |
4572 | if MBTEST(c != ')') | |
d166f048 JA |
4573 | rval = 0; |
4574 | ||
f73dda09 | 4575 | tokstr = (char *)xmalloc (ttoklen + 4); |
d166f048 | 4576 | |
b80f6443 JA |
4577 | /* if ADDDQ != 0 then (( ... )) -> "..." */ |
4578 | if (rval == 1 && adddq) /* arith cmd, add double quotes */ | |
d166f048 | 4579 | { |
b80f6443 JA |
4580 | tokstr[0] = '"'; |
4581 | strncpy (tokstr + 1, ttok, ttoklen - 1); | |
f73dda09 JA |
4582 | tokstr[ttoklen] = '"'; |
4583 | tokstr[ttoklen+1] = '\0'; | |
d166f048 | 4584 | } |
b80f6443 | 4585 | else if (rval == 1) /* arith cmd, don't add double quotes */ |
d166f048 | 4586 | { |
b80f6443 JA |
4587 | strncpy (tokstr, ttok, ttoklen - 1); |
4588 | tokstr[ttoklen-1] = '\0'; | |
4589 | } | |
4590 | else /* nested subshell */ | |
4591 | { | |
4592 | tokstr[0] = '('; | |
4593 | strncpy (tokstr + 1, ttok, ttoklen - 1); | |
f73dda09 JA |
4594 | tokstr[ttoklen] = ')'; |
4595 | tokstr[ttoklen+1] = c; | |
4596 | tokstr[ttoklen+2] = '\0'; | |
d166f048 | 4597 | } |
b80f6443 | 4598 | |
f73dda09 | 4599 | *ep = tokstr; |
d166f048 JA |
4600 | FREE (ttok); |
4601 | return rval; | |
4602 | } | |
bb70624e | 4603 | #endif /* DPAREN_ARITHMETIC || ARITH_FOR_COMMAND */ |
d166f048 | 4604 | |
cce855bc | 4605 | #if defined (COND_COMMAND) |
7117c2d2 JA |
4606 | static void |
4607 | cond_error () | |
4608 | { | |
4609 | char *etext; | |
4610 | ||
4611 | if (EOF_Reached && cond_token != COND_ERROR) /* [[ */ | |
b80f6443 | 4612 | parser_error (cond_lineno, _("unexpected EOF while looking for `]]'")); |
7117c2d2 JA |
4613 | else if (cond_token != COND_ERROR) |
4614 | { | |
4615 | if (etext = error_token_from_token (cond_token)) | |
4616 | { | |
b80f6443 | 4617 | parser_error (cond_lineno, _("syntax error in conditional expression: unexpected token `%s'"), etext); |
7117c2d2 JA |
4618 | free (etext); |
4619 | } | |
4620 | else | |
b80f6443 | 4621 | parser_error (cond_lineno, _("syntax error in conditional expression")); |
7117c2d2 JA |
4622 | } |
4623 | } | |
4624 | ||
cce855bc JA |
4625 | static COND_COM * |
4626 | cond_expr () | |
4627 | { | |
4628 | return (cond_or ()); | |
4629 | } | |
4630 | ||
4631 | static COND_COM * | |
4632 | cond_or () | |
4633 | { | |
4634 | COND_COM *l, *r; | |
4635 | ||
4636 | l = cond_and (); | |
4637 | if (cond_token == OR_OR) | |
4638 | { | |
4639 | r = cond_or (); | |
4640 | l = make_cond_node (COND_OR, (WORD_DESC *)NULL, l, r); | |
4641 | } | |
4642 | return l; | |
4643 | } | |
4644 | ||
4645 | static COND_COM * | |
4646 | cond_and () | |
4647 | { | |
4648 | COND_COM *l, *r; | |
4649 | ||
4650 | l = cond_term (); | |
4651 | if (cond_token == AND_AND) | |
4652 | { | |
4653 | r = cond_and (); | |
4654 | l = make_cond_node (COND_AND, (WORD_DESC *)NULL, l, r); | |
4655 | } | |
4656 | return l; | |
4657 | } | |
4658 | ||
4659 | static int | |
4660 | cond_skip_newlines () | |
4661 | { | |
4662 | while ((cond_token = read_token (READ)) == '\n') | |
4663 | { | |
b80f6443 | 4664 | if (SHOULD_PROMPT ()) |
cce855bc JA |
4665 | prompt_again (); |
4666 | } | |
4667 | return (cond_token); | |
4668 | } | |
4669 | ||
4670 | #define COND_RETURN_ERROR() \ | |
4671 | do { cond_token = COND_ERROR; return ((COND_COM *)NULL); } while (0) | |
4672 | ||
4673 | static COND_COM * | |
4674 | cond_term () | |
4675 | { | |
4676 | WORD_DESC *op; | |
4677 | COND_COM *term, *tleft, *tright; | |
4678 | int tok, lineno; | |
7117c2d2 | 4679 | char *etext; |
cce855bc JA |
4680 | |
4681 | /* Read a token. It can be a left paren, a `!', a unary operator, or a | |
4682 | word that should be the first argument of a binary operator. Start by | |
4683 | skipping newlines, since this is a compound command. */ | |
4684 | tok = cond_skip_newlines (); | |
4685 | lineno = line_number; | |
4686 | if (tok == COND_END) | |
4687 | { | |
4688 | COND_RETURN_ERROR (); | |
4689 | } | |
4690 | else if (tok == '(') | |
4691 | { | |
4692 | term = cond_expr (); | |
4693 | if (cond_token != ')') | |
4694 | { | |
4695 | if (term) | |
4696 | dispose_cond_node (term); /* ( */ | |
7117c2d2 JA |
4697 | if (etext = error_token_from_token (cond_token)) |
4698 | { | |
b80f6443 | 4699 | parser_error (lineno, _("unexpected token `%s', expected `)'"), etext); |
7117c2d2 JA |
4700 | free (etext); |
4701 | } | |
4702 | else | |
b80f6443 | 4703 | parser_error (lineno, _("expected `)'")); |
cce855bc JA |
4704 | COND_RETURN_ERROR (); |
4705 | } | |
4706 | term = make_cond_node (COND_EXPR, (WORD_DESC *)NULL, term, (COND_COM *)NULL); | |
4707 | (void)cond_skip_newlines (); | |
4708 | } | |
4709 | else if (tok == BANG || (tok == WORD && (yylval.word->word[0] == '!' && yylval.word->word[1] == '\0'))) | |
4710 | { | |
4711 | if (tok == WORD) | |
4712 | dispose_word (yylval.word); /* not needed */ | |
4713 | term = cond_term (); | |
4714 | if (term) | |
4715 | term->flags |= CMD_INVERT_RETURN; | |
4716 | } | |
d233b485 | 4717 | else if (tok == WORD && yylval.word->word[0] == '-' && yylval.word->word[1] && yylval.word->word[2] == 0 && test_unop (yylval.word->word)) |
cce855bc JA |
4718 | { |
4719 | op = yylval.word; | |
4720 | tok = read_token (READ); | |
4721 | if (tok == WORD) | |
4722 | { | |
4723 | tleft = make_cond_node (COND_TERM, yylval.word, (COND_COM *)NULL, (COND_COM *)NULL); | |
4724 | term = make_cond_node (COND_UNARY, op, tleft, (COND_COM *)NULL); | |
4725 | } | |
4726 | else | |
4727 | { | |
4728 | dispose_word (op); | |
7117c2d2 JA |
4729 | if (etext = error_token_from_token (tok)) |
4730 | { | |
b80f6443 | 4731 | parser_error (line_number, _("unexpected argument `%s' to conditional unary operator"), etext); |
7117c2d2 JA |
4732 | free (etext); |
4733 | } | |
4734 | else | |
b80f6443 | 4735 | parser_error (line_number, _("unexpected argument to conditional unary operator")); |
cce855bc JA |
4736 | COND_RETURN_ERROR (); |
4737 | } | |
4738 | ||
4739 | (void)cond_skip_newlines (); | |
4740 | } | |
bb70624e | 4741 | else if (tok == WORD) /* left argument to binary operator */ |
cce855bc JA |
4742 | { |
4743 | /* lhs */ | |
4744 | tleft = make_cond_node (COND_TERM, yylval.word, (COND_COM *)NULL, (COND_COM *)NULL); | |
4745 | ||
4746 | /* binop */ | |
4747 | tok = read_token (READ); | |
4748 | if (tok == WORD && test_binop (yylval.word->word)) | |
0001803f CR |
4749 | { |
4750 | op = yylval.word; | |
4751 | if (op->word[0] == '=' && (op->word[1] == '\0' || (op->word[1] == '=' && op->word[2] == '\0'))) | |
4752 | parser_state |= PST_EXTPAT; | |
4753 | else if (op->word[0] == '!' && op->word[1] == '=' && op->word[2] == '\0') | |
4754 | parser_state |= PST_EXTPAT; | |
4755 | } | |
b80f6443 | 4756 | #if defined (COND_REGEXP) |
f1be666c JA |
4757 | else if (tok == WORD && STREQ (yylval.word->word, "=~")) |
4758 | { | |
4759 | op = yylval.word; | |
4760 | parser_state |= PST_REGEXP; | |
4761 | } | |
b80f6443 | 4762 | #endif |
cce855bc | 4763 | else if (tok == '<' || tok == '>') |
28ef6c31 JA |
4764 | op = make_word_from_token (tok); /* ( */ |
4765 | /* There should be a check before blindly accepting the `)' that we have | |
4766 | seen the opening `('. */ | |
4767 | else if (tok == COND_END || tok == AND_AND || tok == OR_OR || tok == ')') | |
cce855bc JA |
4768 | { |
4769 | /* Special case. [[ x ]] is equivalent to [[ -n x ]], just like | |
4770 | the test command. Similarly for [[ x && expr ]] or | |
28ef6c31 | 4771 | [[ x || expr ]] or [[ (x) ]]. */ |
cce855bc JA |
4772 | op = make_word ("-n"); |
4773 | term = make_cond_node (COND_UNARY, op, tleft, (COND_COM *)NULL); | |
4774 | cond_token = tok; | |
4775 | return (term); | |
4776 | } | |
4777 | else | |
4778 | { | |
7117c2d2 JA |
4779 | if (etext = error_token_from_token (tok)) |
4780 | { | |
b80f6443 | 4781 | parser_error (line_number, _("unexpected token `%s', conditional binary operator expected"), etext); |
7117c2d2 JA |
4782 | free (etext); |
4783 | } | |
4784 | else | |
b80f6443 | 4785 | parser_error (line_number, _("conditional binary operator expected")); |
cce855bc JA |
4786 | dispose_cond_node (tleft); |
4787 | COND_RETURN_ERROR (); | |
4788 | } | |
4789 | ||
4790 | /* rhs */ | |
0001803f CR |
4791 | if (parser_state & PST_EXTPAT) |
4792 | extended_glob = 1; | |
cce855bc | 4793 | tok = read_token (READ); |
0001803f CR |
4794 | if (parser_state & PST_EXTPAT) |
4795 | extended_glob = global_extglob; | |
4796 | parser_state &= ~(PST_REGEXP|PST_EXTPAT); | |
4797 | ||
cce855bc JA |
4798 | if (tok == WORD) |
4799 | { | |
4800 | tright = make_cond_node (COND_TERM, yylval.word, (COND_COM *)NULL, (COND_COM *)NULL); | |
4801 | term = make_cond_node (COND_BINARY, op, tleft, tright); | |
4802 | } | |
4803 | else | |
4804 | { | |
7117c2d2 JA |
4805 | if (etext = error_token_from_token (tok)) |
4806 | { | |
b80f6443 | 4807 | parser_error (line_number, _("unexpected argument `%s' to conditional binary operator"), etext); |
7117c2d2 JA |
4808 | free (etext); |
4809 | } | |
4810 | else | |
b80f6443 | 4811 | parser_error (line_number, _("unexpected argument to conditional binary operator")); |
cce855bc JA |
4812 | dispose_cond_node (tleft); |
4813 | dispose_word (op); | |
4814 | COND_RETURN_ERROR (); | |
4815 | } | |
4816 | ||
4817 | (void)cond_skip_newlines (); | |
4818 | } | |
bb70624e JA |
4819 | else |
4820 | { | |
4821 | if (tok < 256) | |
b80f6443 | 4822 | parser_error (line_number, _("unexpected token `%c' in conditional command"), tok); |
7117c2d2 JA |
4823 | else if (etext = error_token_from_token (tok)) |
4824 | { | |
b80f6443 | 4825 | parser_error (line_number, _("unexpected token `%s' in conditional command"), etext); |
7117c2d2 JA |
4826 | free (etext); |
4827 | } | |
bb70624e | 4828 | else |
b80f6443 | 4829 | parser_error (line_number, _("unexpected token %d in conditional command"), tok); |
bb70624e JA |
4830 | COND_RETURN_ERROR (); |
4831 | } | |
cce855bc JA |
4832 | return (term); |
4833 | } | |
4834 | ||
4835 | /* This is kind of bogus -- we slip a mini recursive-descent parser in | |
4836 | here to handle the conditional statement syntax. */ | |
4837 | static COMMAND * | |
4838 | parse_cond_command () | |
4839 | { | |
4840 | COND_COM *cexp; | |
4841 | ||
0001803f | 4842 | global_extglob = extended_glob; |
cce855bc JA |
4843 | cexp = cond_expr (); |
4844 | return (make_cond_command (cexp)); | |
4845 | } | |
4846 | #endif | |
4847 | ||
7117c2d2 JA |
4848 | #if defined (ARRAY_VARS) |
4849 | /* When this is called, it's guaranteed that we don't care about anything | |
d233b485 CR |
4850 | in t beyond i. We use a buffer with room for the characters we add just |
4851 | in case assignment() ends up doing something like parsing a command | |
4852 | substitution that will reallocate atoken. We don't want to write beyond | |
4853 | the end of an allocated buffer. */ | |
7117c2d2 JA |
4854 | static int |
4855 | token_is_assignment (t, i) | |
4856 | char *t; | |
4857 | int i; | |
4858 | { | |
7117c2d2 | 4859 | int r; |
d233b485 | 4860 | char *atoken; |
7117c2d2 | 4861 | |
d233b485 CR |
4862 | atoken = xmalloc (i + 3); |
4863 | memcpy (atoken, t, i); | |
4864 | atoken[i] = '='; | |
4865 | atoken[i+1] = '\0'; | |
4866 | ||
4867 | r = assignment (atoken, (parser_state & PST_COMPASSIGN) != 0); | |
4868 | ||
4869 | free (atoken); | |
4870 | ||
4871 | /* XXX - check that r == i to avoid returning false positive for | |
4872 | t containing `=' before t[i]. */ | |
4873 | return (r > 0 && r == i); | |
7117c2d2 JA |
4874 | } |
4875 | ||
95732b49 | 4876 | /* XXX - possible changes here for `+=' */ |
7117c2d2 JA |
4877 | static int |
4878 | token_is_ident (t, i) | |
4879 | char *t; | |
4880 | int i; | |
4881 | { | |
4882 | unsigned char c; | |
4883 | int r; | |
4884 | ||
4885 | c = t[i]; | |
4886 | t[i] = '\0'; | |
4887 | r = legal_identifier (t); | |
4888 | t[i] = c; | |
4889 | return r; | |
4890 | } | |
4891 | #endif | |
4892 | ||
ccc6cda3 JA |
4893 | static int |
4894 | read_token_word (character) | |
4895 | int character; | |
4896 | { | |
4897 | /* The value for YYLVAL when a WORD is read. */ | |
4898 | WORD_DESC *the_word; | |
726f6388 | 4899 | |
ccc6cda3 JA |
4900 | /* Index into the token that we are building. */ |
4901 | int token_index; | |
726f6388 | 4902 | |
ccc6cda3 | 4903 | /* ALL_DIGITS becomes zero when we see a non-digit. */ |
f73dda09 | 4904 | int all_digit_token; |
726f6388 | 4905 | |
ccc6cda3 JA |
4906 | /* DOLLAR_PRESENT becomes non-zero if we see a `$'. */ |
4907 | int dollar_present; | |
726f6388 | 4908 | |
95732b49 JA |
4909 | /* COMPOUND_ASSIGNMENT becomes non-zero if we are parsing a compound |
4910 | assignment. */ | |
4911 | int compound_assignment; | |
4912 | ||
ccc6cda3 JA |
4913 | /* QUOTED becomes non-zero if we see one of ("), ('), (`), or (\). */ |
4914 | int quoted; | |
726f6388 | 4915 | |
ccc6cda3 JA |
4916 | /* Non-zero means to ignore the value of the next character, and just |
4917 | to add it no matter what. */ | |
a0c0a00f | 4918 | int pass_next_character; |
726f6388 | 4919 | |
ccc6cda3 JA |
4920 | /* The current delimiting character. */ |
4921 | int cd; | |
4922 | int result, peek_char; | |
4923 | char *ttok, *ttrans; | |
4924 | int ttoklen, ttranslen; | |
7117c2d2 | 4925 | intmax_t lvalue; |
726f6388 | 4926 | |
d166f048 | 4927 | if (token_buffer_size < TOKEN_DEFAULT_INITIAL_SIZE) |
f73dda09 | 4928 | token = (char *)xrealloc (token, token_buffer_size = TOKEN_DEFAULT_INITIAL_SIZE); |
726f6388 | 4929 | |
ccc6cda3 | 4930 | token_index = 0; |
f73dda09 | 4931 | all_digit_token = DIGIT (character); |
95732b49 | 4932 | dollar_present = quoted = pass_next_character = compound_assignment = 0; |
726f6388 | 4933 | |
ccc6cda3 JA |
4934 | for (;;) |
4935 | { | |
4936 | if (character == EOF) | |
4937 | goto got_token; | |
726f6388 | 4938 | |
ccc6cda3 JA |
4939 | if (pass_next_character) |
4940 | { | |
4941 | pass_next_character = 0; | |
f1be666c | 4942 | goto got_escaped_character; |
ccc6cda3 | 4943 | } |
726f6388 | 4944 | |
ccc6cda3 | 4945 | cd = current_delimiter (dstack); |
726f6388 | 4946 | |
ccc6cda3 JA |
4947 | /* Handle backslashes. Quote lots of things when not inside of |
4948 | double-quotes, quote some things inside of double-quotes. */ | |
7117c2d2 | 4949 | if MBTEST(character == '\\') |
ccc6cda3 JA |
4950 | { |
4951 | peek_char = shell_getc (0); | |
726f6388 | 4952 | |
ccc6cda3 JA |
4953 | /* Backslash-newline is ignored in all cases except |
4954 | when quoted with single quotes. */ | |
4955 | if (peek_char == '\n') | |
4956 | { | |
4957 | character = '\n'; | |
4958 | goto next_character; | |
4959 | } | |
4960 | else | |
4961 | { | |
4962 | shell_ungetc (peek_char); | |
726f6388 | 4963 | |
ccc6cda3 JA |
4964 | /* If the next character is to be quoted, note it now. */ |
4965 | if (cd == 0 || cd == '`' || | |
f73dda09 | 4966 | (cd == '"' && peek_char >= 0 && (sh_syntaxtab[peek_char] & CBSDQUOTE))) |
ccc6cda3 | 4967 | pass_next_character++; |
726f6388 | 4968 | |
ccc6cda3 JA |
4969 | quoted = 1; |
4970 | goto got_character; | |
4971 | } | |
4972 | } | |
726f6388 | 4973 | |
ccc6cda3 | 4974 | /* Parse a matched pair of quote characters. */ |
7117c2d2 | 4975 | if MBTEST(shellquote (character)) |
ccc6cda3 JA |
4976 | { |
4977 | push_delimiter (dstack, character); | |
95732b49 | 4978 | ttok = parse_matched_pair (character, character, character, &ttoklen, (character == '`') ? P_COMMAND : 0); |
ccc6cda3 JA |
4979 | pop_delimiter (dstack); |
4980 | if (ttok == &matched_pair_error) | |
4981 | return -1; /* Bail immediately. */ | |
4982 | RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 2, | |
4983 | token_buffer_size, TOKEN_DEFAULT_GROW_SIZE); | |
4984 | token[token_index++] = character; | |
4985 | strcpy (token + token_index, ttok); | |
4986 | token_index += ttoklen; | |
f73dda09 | 4987 | all_digit_token = 0; |
d233b485 CR |
4988 | if (character != '`') |
4989 | quoted = 1; | |
ccc6cda3 JA |
4990 | dollar_present |= (character == '"' && strchr (ttok, '$') != 0); |
4991 | FREE (ttok); | |
4992 | goto next_character; | |
4993 | } | |
726f6388 | 4994 | |
f1be666c JA |
4995 | #ifdef COND_REGEXP |
4996 | /* When parsing a regexp as a single word inside a conditional command, | |
4997 | we need to special-case characters special to both the shell and | |
4998 | regular expressions. Right now, that is only '(' and '|'. */ /*)*/ | |
4999 | if MBTEST((parser_state & PST_REGEXP) && (character == '(' || character == '|')) /*)*/ | |
3185942a JA |
5000 | { |
5001 | if (character == '|') | |
5002 | goto got_character; | |
f1be666c JA |
5003 | |
5004 | push_delimiter (dstack, character); | |
5005 | ttok = parse_matched_pair (cd, '(', ')', &ttoklen, 0); | |
5006 | pop_delimiter (dstack); | |
5007 | if (ttok == &matched_pair_error) | |
5008 | return -1; /* Bail immediately. */ | |
5009 | RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 2, | |
5010 | token_buffer_size, TOKEN_DEFAULT_GROW_SIZE); | |
5011 | token[token_index++] = character; | |
5012 | strcpy (token + token_index, ttok); | |
5013 | token_index += ttoklen; | |
5014 | FREE (ttok); | |
5015 | dollar_present = all_digit_token = 0; | |
5016 | goto next_character; | |
3185942a | 5017 | } |
f1be666c JA |
5018 | #endif /* COND_REGEXP */ |
5019 | ||
cce855bc JA |
5020 | #ifdef EXTENDED_GLOB |
5021 | /* Parse a ksh-style extended pattern matching specification. */ | |
f1be666c | 5022 | if MBTEST(extended_glob && PATTERN_CHAR (character)) |
cce855bc JA |
5023 | { |
5024 | peek_char = shell_getc (1); | |
7117c2d2 | 5025 | if MBTEST(peek_char == '(') /* ) */ |
cce855bc JA |
5026 | { |
5027 | push_delimiter (dstack, peek_char); | |
5028 | ttok = parse_matched_pair (cd, '(', ')', &ttoklen, 0); | |
5029 | pop_delimiter (dstack); | |
5030 | if (ttok == &matched_pair_error) | |
5031 | return -1; /* Bail immediately. */ | |
ac50fbac | 5032 | RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 3, |
cce855bc JA |
5033 | token_buffer_size, |
5034 | TOKEN_DEFAULT_GROW_SIZE); | |
5035 | token[token_index++] = character; | |
5036 | token[token_index++] = peek_char; | |
5037 | strcpy (token + token_index, ttok); | |
5038 | token_index += ttoklen; | |
5039 | FREE (ttok); | |
f73dda09 | 5040 | dollar_present = all_digit_token = 0; |
cce855bc JA |
5041 | goto next_character; |
5042 | } | |
5043 | else | |
5044 | shell_ungetc (peek_char); | |
5045 | } | |
5046 | #endif /* EXTENDED_GLOB */ | |
5047 | ||
ccc6cda3 JA |
5048 | /* If the delimiter character is not single quote, parse some of |
5049 | the shell expansions that must be read as a single word. */ | |
28ef6c31 | 5050 | if (shellexp (character)) |
ccc6cda3 JA |
5051 | { |
5052 | peek_char = shell_getc (1); | |
5053 | /* $(...), <(...), >(...), $((...)), ${...}, and $[...] constructs */ | |
ac50fbac | 5054 | if MBTEST(peek_char == '(' || |
ccc6cda3 JA |
5055 | ((peek_char == '{' || peek_char == '[') && character == '$')) /* ) ] } */ |
5056 | { | |
5057 | if (peek_char == '{') /* } */ | |
495aee44 | 5058 | ttok = parse_matched_pair (cd, '{', '}', &ttoklen, P_FIRSTCLOSE|P_DOLBRACE); |
ccc6cda3 | 5059 | else if (peek_char == '(') /* ) */ |
d166f048 JA |
5060 | { |
5061 | /* XXX - push and pop the `(' as a delimiter for use by | |
5062 | the command-oriented-history code. This way newlines | |
5063 | appearing in the $(...) string get added to the | |
5064 | history literally rather than causing a possibly- | |
bb70624e | 5065 | incorrect `;' to be added. ) */ |
d166f048 | 5066 | push_delimiter (dstack, peek_char); |
3185942a | 5067 | ttok = parse_comsub (cd, '(', ')', &ttoklen, P_COMMAND); |
d166f048 JA |
5068 | pop_delimiter (dstack); |
5069 | } | |
ccc6cda3 JA |
5070 | else |
5071 | ttok = parse_matched_pair (cd, '[', ']', &ttoklen, 0); | |
5072 | if (ttok == &matched_pair_error) | |
5073 | return -1; /* Bail immediately. */ | |
ac50fbac | 5074 | RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 3, |
ccc6cda3 JA |
5075 | token_buffer_size, |
5076 | TOKEN_DEFAULT_GROW_SIZE); | |
5077 | token[token_index++] = character; | |
5078 | token[token_index++] = peek_char; | |
5079 | strcpy (token + token_index, ttok); | |
5080 | token_index += ttoklen; | |
5081 | FREE (ttok); | |
5082 | dollar_present = 1; | |
f73dda09 | 5083 | all_digit_token = 0; |
ccc6cda3 JA |
5084 | goto next_character; |
5085 | } | |
5086 | /* This handles $'...' and $"..." new-style quoted strings. */ | |
7117c2d2 | 5087 | else if MBTEST(character == '$' && (peek_char == '\'' || peek_char == '"')) |
ccc6cda3 | 5088 | { |
cce855bc JA |
5089 | int first_line; |
5090 | ||
5091 | first_line = line_number; | |
bb70624e JA |
5092 | push_delimiter (dstack, peek_char); |
5093 | ttok = parse_matched_pair (peek_char, peek_char, peek_char, | |
5094 | &ttoklen, | |
5095 | (peek_char == '\'') ? P_ALLOWESC : 0); | |
5096 | pop_delimiter (dstack); | |
ccc6cda3 JA |
5097 | if (ttok == &matched_pair_error) |
5098 | return -1; | |
5099 | if (peek_char == '\'') | |
bb70624e JA |
5100 | { |
5101 | ttrans = ansiexpand (ttok, 0, ttoklen - 1, &ttranslen); | |
5102 | free (ttok); | |
95732b49 | 5103 | |
bb70624e JA |
5104 | /* Insert the single quotes and correctly quote any |
5105 | embedded single quotes (allowed because P_ALLOWESC was | |
5106 | passed to parse_matched_pair). */ | |
28ef6c31 | 5107 | ttok = sh_single_quote (ttrans); |
bb70624e | 5108 | free (ttrans); |
95732b49 | 5109 | ttranslen = strlen (ttok); |
bb70624e | 5110 | ttrans = ttok; |
bb70624e | 5111 | } |
ccc6cda3 | 5112 | else |
bb70624e | 5113 | { |
0628567a | 5114 | /* Try to locale-expand the converted string. */ |
bb70624e JA |
5115 | ttrans = localeexpand (ttok, 0, ttoklen - 1, first_line, &ttranslen); |
5116 | free (ttok); | |
5117 | ||
5118 | /* Add the double quotes back */ | |
95732b49 | 5119 | ttok = sh_mkdoublequoted (ttrans, ttranslen, 0); |
bb70624e | 5120 | free (ttrans); |
95732b49 | 5121 | ttranslen += 2; |
bb70624e JA |
5122 | ttrans = ttok; |
5123 | } | |
5124 | ||
ac50fbac | 5125 | RESIZE_MALLOCED_BUFFER (token, token_index, ttranslen + 1, |
ccc6cda3 JA |
5126 | token_buffer_size, |
5127 | TOKEN_DEFAULT_GROW_SIZE); | |
ccc6cda3 JA |
5128 | strcpy (token + token_index, ttrans); |
5129 | token_index += ttranslen; | |
ccc6cda3 JA |
5130 | FREE (ttrans); |
5131 | quoted = 1; | |
f73dda09 | 5132 | all_digit_token = 0; |
ccc6cda3 JA |
5133 | goto next_character; |
5134 | } | |
b72432fd JA |
5135 | /* This could eventually be extended to recognize all of the |
5136 | shell's single-character parameter expansions, and set flags.*/ | |
7117c2d2 | 5137 | else if MBTEST(character == '$' && peek_char == '$') |
b72432fd | 5138 | { |
b72432fd JA |
5139 | RESIZE_MALLOCED_BUFFER (token, token_index, 3, |
5140 | token_buffer_size, | |
5141 | TOKEN_DEFAULT_GROW_SIZE); | |
ac50fbac CR |
5142 | token[token_index++] = '$'; |
5143 | token[token_index++] = peek_char; | |
b72432fd | 5144 | dollar_present = 1; |
f73dda09 | 5145 | all_digit_token = 0; |
b72432fd JA |
5146 | goto next_character; |
5147 | } | |
ccc6cda3 JA |
5148 | else |
5149 | shell_ungetc (peek_char); | |
5150 | } | |
726f6388 | 5151 | |
ccc6cda3 | 5152 | #if defined (ARRAY_VARS) |
3185942a JA |
5153 | /* Identify possible array subscript assignment; match [...]. If |
5154 | parser_state&PST_COMPASSIGN, we need to parse [sub]=words treating | |
5155 | `sub' as if it were enclosed in double quotes. */ | |
5156 | else if MBTEST(character == '[' && /* ] */ | |
5157 | ((token_index > 0 && assignment_acceptable (last_read_token) && token_is_ident (token, token_index)) || | |
5158 | (token_index == 0 && (parser_state&PST_COMPASSIGN)))) | |
7117c2d2 | 5159 | { |
89a92869 | 5160 | ttok = parse_matched_pair (cd, '[', ']', &ttoklen, P_ARRAYSUB); |
7117c2d2 JA |
5161 | if (ttok == &matched_pair_error) |
5162 | return -1; /* Bail immediately. */ | |
5163 | RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 2, | |
5164 | token_buffer_size, | |
5165 | TOKEN_DEFAULT_GROW_SIZE); | |
5166 | token[token_index++] = character; | |
5167 | strcpy (token + token_index, ttok); | |
5168 | token_index += ttoklen; | |
5169 | FREE (ttok); | |
5170 | all_digit_token = 0; | |
5171 | goto next_character; | |
5172 | } | |
ccc6cda3 | 5173 | /* Identify possible compound array variable assignment. */ |
95732b49 | 5174 | else if MBTEST(character == '=' && token_index > 0 && (assignment_acceptable (last_read_token) || (parser_state & PST_ASSIGNOK)) && token_is_assignment (token, token_index)) |
ccc6cda3 JA |
5175 | { |
5176 | peek_char = shell_getc (1); | |
7117c2d2 | 5177 | if MBTEST(peek_char == '(') /* ) */ |
ccc6cda3 | 5178 | { |
7117c2d2 JA |
5179 | ttok = parse_compound_assignment (&ttoklen); |
5180 | ||
5181 | RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 4, | |
ccc6cda3 JA |
5182 | token_buffer_size, |
5183 | TOKEN_DEFAULT_GROW_SIZE); | |
7117c2d2 JA |
5184 | |
5185 | token[token_index++] = '='; | |
5186 | token[token_index++] = '('; | |
5187 | if (ttok) | |
5188 | { | |
5189 | strcpy (token + token_index, ttok); | |
5190 | token_index += ttoklen; | |
5191 | } | |
5192 | token[token_index++] = ')'; | |
ccc6cda3 | 5193 | FREE (ttok); |
f73dda09 | 5194 | all_digit_token = 0; |
95732b49 | 5195 | compound_assignment = 1; |
0628567a | 5196 | #if 1 |
ccc6cda3 | 5197 | goto next_character; |
95732b49 JA |
5198 | #else |
5199 | goto got_token; /* ksh93 seems to do this */ | |
5200 | #endif | |
ccc6cda3 JA |
5201 | } |
5202 | else | |
5203 | shell_ungetc (peek_char); | |
5204 | } | |
5205 | #endif | |
726f6388 | 5206 | |
ccc6cda3 JA |
5207 | /* When not parsing a multi-character word construct, shell meta- |
5208 | characters break words. */ | |
7117c2d2 | 5209 | if MBTEST(shellbreak (character)) |
ccc6cda3 JA |
5210 | { |
5211 | shell_ungetc (character); | |
5212 | goto got_token; | |
5213 | } | |
726f6388 | 5214 | |
ac50fbac | 5215 | got_character: |
ccc6cda3 | 5216 | if (character == CTLESC || character == CTLNUL) |
ac50fbac CR |
5217 | { |
5218 | RESIZE_MALLOCED_BUFFER (token, token_index, 2, token_buffer_size, | |
5219 | TOKEN_DEFAULT_GROW_SIZE); | |
5220 | token[token_index++] = CTLESC; | |
5221 | } | |
5222 | else | |
5223 | got_escaped_character: | |
5224 | RESIZE_MALLOCED_BUFFER (token, token_index, 1, token_buffer_size, | |
5225 | TOKEN_DEFAULT_GROW_SIZE); | |
726f6388 | 5226 | |
ac50fbac | 5227 | token[token_index++] = character; |
f1be666c JA |
5228 | |
5229 | all_digit_token &= DIGIT (character); | |
5230 | dollar_present |= character == '$'; | |
5231 | ||
ccc6cda3 | 5232 | next_character: |
b80f6443 | 5233 | if (character == '\n' && SHOULD_PROMPT ()) |
ccc6cda3 | 5234 | prompt_again (); |
726f6388 | 5235 | |
ccc6cda3 JA |
5236 | /* We want to remove quoted newlines (that is, a \<newline> pair) |
5237 | unless we are within single quotes or pass_next_character is | |
5238 | set (the shell equivalent of literal-next). */ | |
5239 | cd = current_delimiter (dstack); | |
5240 | character = shell_getc (cd != '\'' && pass_next_character == 0); | |
5241 | } /* end for (;;) */ | |
726f6388 | 5242 | |
ccc6cda3 | 5243 | got_token: |
726f6388 | 5244 | |
ac50fbac | 5245 | /* Calls to RESIZE_MALLOCED_BUFFER ensure there is sufficient room. */ |
ccc6cda3 | 5246 | token[token_index] = '\0'; |
726f6388 | 5247 | |
ccc6cda3 JA |
5248 | /* Check to see what thing we should return. If the last_read_token |
5249 | is a `<', or a `&', or the character which ended this token is | |
5250 | a '>' or '<', then, and ONLY then, is this input token a NUMBER. | |
5251 | Otherwise, it is just a word, and should be returned as such. */ | |
ac50fbac CR |
5252 | if MBTEST(all_digit_token && (character == '<' || character == '>' || |
5253 | last_read_token == LESS_AND || | |
ccc6cda3 | 5254 | last_read_token == GREATER_AND)) |
726f6388 | 5255 | { |
f73dda09 | 5256 | if (legal_number (token, &lvalue) && (int)lvalue == lvalue) |
ac50fbac CR |
5257 | { |
5258 | yylval.number = lvalue; | |
5259 | return (NUMBER); | |
5260 | } | |
726f6388 JA |
5261 | } |
5262 | ||
ccc6cda3 | 5263 | /* Check for special case tokens. */ |
7117c2d2 | 5264 | result = (last_shell_getc_is_singlebyte) ? special_case_tokens (token) : -1; |
ccc6cda3 JA |
5265 | if (result >= 0) |
5266 | return result; | |
726f6388 JA |
5267 | |
5268 | #if defined (ALIAS) | |
ccc6cda3 JA |
5269 | /* Posix.2 does not allow reserved words to be aliased, so check for all |
5270 | of them, including special cases, before expanding the current token | |
5271 | as an alias. */ | |
7117c2d2 | 5272 | if MBTEST(posixly_correct) |
ccc6cda3 JA |
5273 | CHECK_FOR_RESERVED_WORD (token); |
5274 | ||
5275 | /* Aliases are expanded iff EXPAND_ALIASES is non-zero, and quoting | |
5276 | inhibits alias expansion. */ | |
5277 | if (expand_aliases && quoted == 0) | |
5278 | { | |
5279 | result = alias_expand_token (token); | |
5280 | if (result == RE_READ_TOKEN) | |
5281 | return (RE_READ_TOKEN); | |
5282 | else if (result == NO_EXPANSION) | |
5283 | parser_state &= ~PST_ALEXPNEXT; | |
5284 | } | |
726f6388 | 5285 | |
ccc6cda3 JA |
5286 | /* If not in Posix.2 mode, check for reserved words after alias |
5287 | expansion. */ | |
7117c2d2 | 5288 | if MBTEST(posixly_correct == 0) |
ccc6cda3 JA |
5289 | #endif |
5290 | CHECK_FOR_RESERVED_WORD (token); | |
5291 | ||
a0c0a00f | 5292 | the_word = alloc_word_desc (); |
f73dda09 | 5293 | the_word->word = (char *)xmalloc (1 + token_index); |
ccc6cda3 JA |
5294 | the_word->flags = 0; |
5295 | strcpy (the_word->word, token); | |
5296 | if (dollar_present) | |
5297 | the_word->flags |= W_HASDOLLAR; | |
5298 | if (quoted) | |
0628567a JA |
5299 | the_word->flags |= W_QUOTED; /*(*/ |
5300 | if (compound_assignment && token[token_index-1] == ')') | |
95732b49 | 5301 | the_word->flags |= W_COMPASSIGN; |
ccc6cda3 JA |
5302 | /* A word is an assignment if it appears at the beginning of a |
5303 | simple command, or after another assignment word. This is | |
5304 | context-dependent, so it cannot be handled in the grammar. */ | |
b80f6443 | 5305 | if (assignment (token, (parser_state & PST_COMPASSIGN) != 0)) |
ccc6cda3 JA |
5306 | { |
5307 | the_word->flags |= W_ASSIGNMENT; | |
5308 | /* Don't perform word splitting on assignment statements. */ | |
b80f6443 | 5309 | if (assignment_acceptable (last_read_token) || (parser_state & PST_COMPASSIGN) != 0) |
ac50fbac CR |
5310 | { |
5311 | the_word->flags |= W_NOSPLIT; | |
5312 | if (parser_state & PST_COMPASSIGN) | |
5313 | the_word->flags |= W_NOGLOB; /* XXX - W_NOBRACE? */ | |
5314 | } | |
ccc6cda3 | 5315 | } |
726f6388 | 5316 | |
95732b49 JA |
5317 | if (command_token_position (last_read_token)) |
5318 | { | |
5319 | struct builtin *b; | |
5320 | b = builtin_address_internal (token, 0); | |
5321 | if (b && (b->flags & ASSIGNMENT_BUILTIN)) | |
0628567a JA |
5322 | parser_state |= PST_ASSIGNOK; |
5323 | else if (STREQ (token, "eval") || STREQ (token, "let")) | |
5324 | parser_state |= PST_ASSIGNOK; | |
95732b49 JA |
5325 | } |
5326 | ||
ccc6cda3 | 5327 | yylval.word = the_word; |
726f6388 | 5328 | |
d233b485 | 5329 | /* should we check that quoted == 0 as well? */ |
0001803f CR |
5330 | if (token[0] == '{' && token[token_index-1] == '}' && |
5331 | (character == '<' || character == '>')) | |
5332 | { | |
5333 | /* can use token; already copied to the_word */ | |
5334 | token[token_index-1] = '\0'; | |
ac50fbac | 5335 | #if defined (ARRAY_VARS) |
a0c0a00f | 5336 | if (legal_identifier (token+1) || valid_array_reference (token+1, 0)) |
ac50fbac | 5337 | #else |
0001803f | 5338 | if (legal_identifier (token+1)) |
ac50fbac | 5339 | #endif |
0001803f CR |
5340 | { |
5341 | strcpy (the_word->word, token+1); | |
d233b485 CR |
5342 | /* itrace("read_token_word: returning REDIR_WORD for %s", the_word->word); */ |
5343 | yylval.word = the_word; /* accommodate recursive call */ | |
0001803f CR |
5344 | return (REDIR_WORD); |
5345 | } | |
d233b485 CR |
5346 | else |
5347 | /* valid_array_reference can call the parser recursively; need to | |
5348 | make sure that yylval.word doesn't change if we are going to | |
5349 | return WORD or ASSIGNMENT_WORD */ | |
5350 | yylval.word = the_word; | |
0001803f CR |
5351 | } |
5352 | ||
ccc6cda3 JA |
5353 | result = ((the_word->flags & (W_ASSIGNMENT|W_NOSPLIT)) == (W_ASSIGNMENT|W_NOSPLIT)) |
5354 | ? ASSIGNMENT_WORD : WORD; | |
726f6388 | 5355 | |
b80f6443 | 5356 | switch (last_read_token) |
ccc6cda3 | 5357 | { |
b80f6443 | 5358 | case FUNCTION: |
ccc6cda3 JA |
5359 | parser_state |= PST_ALLOWOPNBRC; |
5360 | function_dstart = line_number; | |
b80f6443 JA |
5361 | break; |
5362 | case CASE: | |
5363 | case SELECT: | |
5364 | case FOR: | |
5365 | if (word_top < MAX_CASE_NEST) | |
5366 | word_top++; | |
5367 | word_lineno[word_top] = line_number; | |
d233b485 | 5368 | expecting_in_token++; |
b80f6443 | 5369 | break; |
ccc6cda3 | 5370 | } |
726f6388 | 5371 | |
ccc6cda3 JA |
5372 | return (result); |
5373 | } | |
726f6388 | 5374 | |
f73dda09 | 5375 | /* Return 1 if TOKSYM is a token that after being read would allow |
726f6388 JA |
5376 | a reserved word to be seen, else 0. */ |
5377 | static int | |
f73dda09 JA |
5378 | reserved_word_acceptable (toksym) |
5379 | int toksym; | |
726f6388 | 5380 | { |
7117c2d2 JA |
5381 | switch (toksym) |
5382 | { | |
5383 | case '\n': | |
5384 | case ';': | |
5385 | case '(': | |
5386 | case ')': | |
5387 | case '|': | |
5388 | case '&': | |
5389 | case '{': | |
5390 | case '}': /* XXX */ | |
5391 | case AND_AND: | |
5392 | case BANG: | |
89a92869 | 5393 | case BAR_AND: |
7117c2d2 JA |
5394 | case DO: |
5395 | case DONE: | |
5396 | case ELIF: | |
5397 | case ELSE: | |
5398 | case ESAC: | |
5399 | case FI: | |
5400 | case IF: | |
5401 | case OR_OR: | |
5402 | case SEMI_SEMI: | |
3185942a JA |
5403 | case SEMI_AND: |
5404 | case SEMI_SEMI_AND: | |
7117c2d2 JA |
5405 | case THEN: |
5406 | case TIME: | |
5407 | case TIMEOPT: | |
495aee44 | 5408 | case TIMEIGN: |
3185942a | 5409 | case COPROC: |
7117c2d2 JA |
5410 | case UNTIL: |
5411 | case WHILE: | |
5412 | case 0: | |
5413 | return 1; | |
5414 | default: | |
3185942a JA |
5415 | #if defined (COPROCESS_SUPPORT) |
5416 | if (last_read_token == WORD && token_before_that == COPROC) | |
5417 | return 1; | |
5418 | #endif | |
495aee44 CR |
5419 | if (last_read_token == WORD && token_before_that == FUNCTION) |
5420 | return 1; | |
7117c2d2 JA |
5421 | return 0; |
5422 | } | |
726f6388 | 5423 | } |
7117c2d2 | 5424 | |
726f6388 JA |
5425 | /* Return the index of TOKEN in the alist of reserved words, or -1 if |
5426 | TOKEN is not a shell reserved word. */ | |
5427 | int | |
f73dda09 JA |
5428 | find_reserved_word (tokstr) |
5429 | char *tokstr; | |
726f6388 JA |
5430 | { |
5431 | int i; | |
ccc6cda3 | 5432 | for (i = 0; word_token_alist[i].word; i++) |
f73dda09 | 5433 | if (STREQ (tokstr, word_token_alist[i].word)) |
726f6388 JA |
5434 | return i; |
5435 | return -1; | |
5436 | } | |
5437 | ||
ac50fbac CR |
5438 | /* An interface to let the rest of the shell (primarily the completion |
5439 | system) know what the parser is expecting. */ | |
5440 | int | |
5441 | parser_in_command_position () | |
5442 | { | |
5443 | return (command_token_position (last_read_token)); | |
5444 | } | |
5445 | ||
ccc6cda3 | 5446 | #if 0 |
726f6388 JA |
5447 | #if defined (READLINE) |
5448 | /* Called after each time readline is called. This insures that whatever | |
5449 | the new prompt string is gets propagated to readline's local prompt | |
5450 | variable. */ | |
5451 | static void | |
5452 | reset_readline_prompt () | |
5453 | { | |
ccc6cda3 JA |
5454 | char *temp_prompt; |
5455 | ||
726f6388 JA |
5456 | if (prompt_string_pointer) |
5457 | { | |
ccc6cda3 | 5458 | temp_prompt = (*prompt_string_pointer) |
726f6388 JA |
5459 | ? decode_prompt_string (*prompt_string_pointer) |
5460 | : (char *)NULL; | |
5461 | ||
5462 | if (temp_prompt == 0) | |
5463 | { | |
f73dda09 | 5464 | temp_prompt = (char *)xmalloc (1); |
726f6388 JA |
5465 | temp_prompt[0] = '\0'; |
5466 | } | |
5467 | ||
5468 | FREE (current_readline_prompt); | |
726f6388 JA |
5469 | current_readline_prompt = temp_prompt; |
5470 | } | |
5471 | } | |
5472 | #endif /* READLINE */ | |
ccc6cda3 | 5473 | #endif /* 0 */ |
726f6388 JA |
5474 | |
5475 | #if defined (HISTORY) | |
5476 | /* A list of tokens which can be followed by newlines, but not by | |
5477 | semi-colons. When concatenating multiple lines of history, the | |
5478 | newline separator for such tokens is replaced with a space. */ | |
3185942a | 5479 | static const int no_semi_successors[] = { |
726f6388 | 5480 | '\n', '{', '(', ')', ';', '&', '|', |
3185942a JA |
5481 | CASE, DO, ELSE, IF, SEMI_SEMI, SEMI_AND, SEMI_SEMI_AND, THEN, UNTIL, |
5482 | WHILE, AND_AND, OR_OR, IN, | |
726f6388 JA |
5483 | 0 |
5484 | }; | |
5485 | ||
5486 | /* If we are not within a delimited expression, try to be smart | |
5487 | about which separators can be semi-colons and which must be | |
ccc6cda3 | 5488 | newlines. Returns the string that should be added into the |
495aee44 CR |
5489 | history entry. LINE is the line we're about to add; it helps |
5490 | make some more intelligent decisions in certain cases. */ | |
726f6388 | 5491 | char * |
495aee44 CR |
5492 | history_delimiting_chars (line) |
5493 | const char *line; | |
726f6388 | 5494 | { |
495aee44 | 5495 | static int last_was_heredoc = 0; /* was the last entry the start of a here document? */ |
ccc6cda3 JA |
5496 | register int i; |
5497 | ||
495aee44 CR |
5498 | if ((parser_state & PST_HEREDOC) == 0) |
5499 | last_was_heredoc = 0; | |
5500 | ||
ccc6cda3 JA |
5501 | if (dstack.delimiter_depth != 0) |
5502 | return ("\n"); | |
3185942a JA |
5503 | |
5504 | /* We look for current_command_line_count == 2 because we are looking to | |
5505 | add the first line of the body of the here document (the second line | |
495aee44 CR |
5506 | of the command). We also keep LAST_WAS_HEREDOC as a private sentinel |
5507 | variable to note when we think we added the first line of a here doc | |
5508 | (the one with a "<<" somewhere in it) */ | |
3185942a | 5509 | if (parser_state & PST_HEREDOC) |
495aee44 CR |
5510 | { |
5511 | if (last_was_heredoc) | |
5512 | { | |
5513 | last_was_heredoc = 0; | |
5514 | return "\n"; | |
5515 | } | |
a0c0a00f | 5516 | return (here_doc_first_line ? "\n" : ""); |
495aee44 | 5517 | } |
3185942a | 5518 | |
801b47cb CR |
5519 | if (parser_state & PST_COMPASSIGN) |
5520 | return (" "); | |
5521 | ||
ccc6cda3 JA |
5522 | /* First, handle some special cases. */ |
5523 | /*(*/ | |
5524 | /* If we just read `()', assume it's a function definition, and don't | |
5525 | add a semicolon. If the token before the `)' was not `(', and we're | |
5526 | not in the midst of parsing a case statement, assume it's a | |
5527 | parenthesized command and add the semicolon. */ | |
5528 | /*)(*/ | |
5529 | if (token_before_that == ')') | |
726f6388 | 5530 | { |
ccc6cda3 JA |
5531 | if (two_tokens_ago == '(') /*)*/ /* function def */ |
5532 | return " "; | |
5533 | /* This does not work for subshells inside case statement | |
5534 | command lists. It's a suboptimal solution. */ | |
5535 | else if (parser_state & PST_CASESTMT) /* case statement pattern */ | |
28ef6c31 | 5536 | return " "; |
a0c0a00f | 5537 | else |
28ef6c31 | 5538 | return "; "; /* (...) subshell */ |
ccc6cda3 | 5539 | } |
cce855bc JA |
5540 | else if (token_before_that == WORD && two_tokens_ago == FUNCTION) |
5541 | return " "; /* function def using `function name' without `()' */ | |
726f6388 | 5542 | |
495aee44 CR |
5543 | /* If we're not in a here document, but we think we're about to parse one, |
5544 | and we would otherwise return a `;', return a newline to delimit the | |
5545 | line with the here-doc delimiter */ | |
5546 | else if ((parser_state & PST_HEREDOC) == 0 && current_command_line_count > 1 && last_read_token == '\n' && strstr (line, "<<")) | |
5547 | { | |
5548 | last_was_heredoc = 1; | |
5549 | return "\n"; | |
5550 | } | |
a0c0a00f CR |
5551 | else if ((parser_state & PST_HEREDOC) == 0 && current_command_line_count > 1 && need_here_doc > 0) |
5552 | return "\n"; | |
bb70624e JA |
5553 | else if (token_before_that == WORD && two_tokens_ago == FOR) |
5554 | { | |
5555 | /* Tricky. `for i\nin ...' should not have a semicolon, but | |
5556 | `for i\ndo ...' should. We do what we can. */ | |
3185942a | 5557 | for (i = shell_input_line_index; whitespace (shell_input_line[i]); i++) |
28ef6c31 | 5558 | ; |
bb70624e JA |
5559 | if (shell_input_line[i] && shell_input_line[i] == 'i' && shell_input_line[i+1] == 'n') |
5560 | return " "; | |
5561 | return ";"; | |
5562 | } | |
95732b49 JA |
5563 | else if (two_tokens_ago == CASE && token_before_that == WORD && (parser_state & PST_CASESTMT)) |
5564 | return " "; | |
bb70624e | 5565 | |
ccc6cda3 JA |
5566 | for (i = 0; no_semi_successors[i]; i++) |
5567 | { | |
5568 | if (token_before_that == no_semi_successors[i]) | |
5569 | return (" "); | |
726f6388 | 5570 | } |
ccc6cda3 | 5571 | |
d233b485 CR |
5572 | if (line_isblank (line)) |
5573 | return (""); | |
5574 | ||
ccc6cda3 | 5575 | return ("; "); |
726f6388 JA |
5576 | } |
5577 | #endif /* HISTORY */ | |
5578 | ||
5579 | /* Issue a prompt, or prepare to issue a prompt when the next character | |
5580 | is read. */ | |
5581 | static void | |
5582 | prompt_again () | |
5583 | { | |
5584 | char *temp_prompt; | |
5585 | ||
0001803f | 5586 | if (interactive == 0 || expanding_alias ()) /* XXX */ |
726f6388 JA |
5587 | return; |
5588 | ||
5589 | ps1_prompt = get_string_value ("PS1"); | |
5590 | ps2_prompt = get_string_value ("PS2"); | |
5591 | ||
a0c0a00f CR |
5592 | ps0_prompt = get_string_value ("PS0"); |
5593 | ||
726f6388 JA |
5594 | if (!prompt_string_pointer) |
5595 | prompt_string_pointer = &ps1_prompt; | |
5596 | ||
ccc6cda3 | 5597 | temp_prompt = *prompt_string_pointer |
726f6388 JA |
5598 | ? decode_prompt_string (*prompt_string_pointer) |
5599 | : (char *)NULL; | |
5600 | ||
5601 | if (temp_prompt == 0) | |
5602 | { | |
f73dda09 | 5603 | temp_prompt = (char *)xmalloc (1); |
726f6388 JA |
5604 | temp_prompt[0] = '\0'; |
5605 | } | |
5606 | ||
5607 | current_prompt_string = *prompt_string_pointer; | |
5608 | prompt_string_pointer = &ps2_prompt; | |
5609 | ||
5610 | #if defined (READLINE) | |
5611 | if (!no_line_editing) | |
5612 | { | |
5613 | FREE (current_readline_prompt); | |
5614 | current_readline_prompt = temp_prompt; | |
5615 | } | |
5616 | else | |
5617 | #endif /* READLINE */ | |
5618 | { | |
5619 | FREE (current_decoded_prompt); | |
5620 | current_decoded_prompt = temp_prompt; | |
5621 | } | |
5622 | } | |
5623 | ||
bb70624e JA |
5624 | int |
5625 | get_current_prompt_level () | |
5626 | { | |
5627 | return ((current_prompt_string && current_prompt_string == ps2_prompt) ? 2 : 1); | |
5628 | } | |
5629 | ||
5630 | void | |
5631 | set_current_prompt_level (x) | |
5632 | int x; | |
5633 | { | |
5634 | prompt_string_pointer = (x == 2) ? &ps2_prompt : &ps1_prompt; | |
5635 | current_prompt_string = *prompt_string_pointer; | |
5636 | } | |
5637 | ||
726f6388 JA |
5638 | static void |
5639 | print_prompt () | |
5640 | { | |
5641 | fprintf (stderr, "%s", current_decoded_prompt); | |
5642 | fflush (stderr); | |
5643 | } | |
5644 | ||
d233b485 CR |
5645 | #if defined (HISTORY) |
5646 | /* The history library increments the history offset as soon as it stores | |
5647 | the first line of a potentially multi-line command, so we compensate | |
5648 | here by returning one fewer when appropriate. */ | |
5649 | static int | |
5650 | prompt_history_number (pmt) | |
5651 | char *pmt; | |
5652 | { | |
5653 | int ret; | |
5654 | ||
5655 | ret = history_number (); | |
5656 | if (ret == 1) | |
5657 | return ret; | |
5658 | ||
5659 | if (pmt == ps1_prompt) /* are we expanding $PS1? */ | |
5660 | return ret; | |
5661 | else if (pmt == ps2_prompt && command_oriented_history == 0) | |
5662 | return ret; /* not command oriented history */ | |
5663 | else if (pmt == ps2_prompt && command_oriented_history && current_command_first_line_saved) | |
5664 | return ret - 1; | |
5665 | else | |
5666 | return ret - 1; /* PS0, PS4, ${var@P}, PS2 other cases */ | |
5667 | } | |
5668 | #endif | |
5669 | ||
726f6388 JA |
5670 | /* Return a string which will be printed as a prompt. The string |
5671 | may contain special characters which are decoded as follows: | |
ccc6cda3 JA |
5672 | |
5673 | \a bell (ascii 07) | |
ccc6cda3 | 5674 | \d the date in Day Mon Date format |
7117c2d2 | 5675 | \e escape (ascii 033) |
ccc6cda3 JA |
5676 | \h the hostname up to the first `.' |
5677 | \H the hostname | |
bb70624e JA |
5678 | \j the number of active jobs |
5679 | \l the basename of the shell's tty device name | |
726f6388 | 5680 | \n CRLF |
7117c2d2 | 5681 | \r CR |
726f6388 | 5682 | \s the name of the shell |
ccc6cda3 JA |
5683 | \t the time in 24-hour hh:mm:ss format |
5684 | \T the time in 12-hour hh:mm:ss format | |
7117c2d2 JA |
5685 | \@ the time in 12-hour hh:mm am/pm format |
5686 | \A the time in 24-hour hh:mm format | |
5687 | \D{fmt} the result of passing FMT to strftime(3) | |
5688 | \u your username | |
ccc6cda3 JA |
5689 | \v the version of bash (e.g., 2.00) |
5690 | \V the release of bash, version + patchlevel (e.g., 2.00.0) | |
726f6388 | 5691 | \w the current working directory |
ccc6cda3 | 5692 | \W the last element of $PWD |
726f6388 | 5693 | \! the history number of this command |
7117c2d2 | 5694 | \# the command number of this command |
726f6388 | 5695 | \$ a $ or a # if you are root |
ccc6cda3 | 5696 | \nnn character code nnn in octal |
726f6388 | 5697 | \\ a backslash |
ccc6cda3 JA |
5698 | \[ begin a sequence of non-printing chars |
5699 | \] end a sequence of non-printing chars | |
726f6388 | 5700 | */ |
d166f048 | 5701 | #define PROMPT_GROWTH 48 |
726f6388 JA |
5702 | char * |
5703 | decode_prompt_string (string) | |
5704 | char *string; | |
5705 | { | |
726f6388 | 5706 | WORD_LIST *list; |
d233b485 | 5707 | char *result, *t, *orig_string; |
ccc6cda3 | 5708 | struct dstack save_dstack; |
0001803f | 5709 | int last_exit_value, last_comsub_pid; |
726f6388 | 5710 | #if defined (PROMPT_STRING_DECODE) |
a0c0a00f CR |
5711 | size_t result_size; |
5712 | int result_index; | |
0628567a | 5713 | int c, n, i; |
a0c0a00f | 5714 | char *temp, *t_host, octal_string[4]; |
7117c2d2 | 5715 | struct tm *tm; |
ccc6cda3 | 5716 | time_t the_time; |
7117c2d2 JA |
5717 | char timebuf[128]; |
5718 | char *timefmt; | |
726f6388 | 5719 | |
f73dda09 | 5720 | result = (char *)xmalloc (result_size = PROMPT_GROWTH); |
ccc6cda3 JA |
5721 | result[result_index = 0] = 0; |
5722 | temp = (char *)NULL; | |
d233b485 | 5723 | orig_string = string; |
726f6388 JA |
5724 | |
5725 | while (c = *string++) | |
5726 | { | |
5727 | if (posixly_correct && c == '!') | |
5728 | { | |
5729 | if (*string == '!') | |
5730 | { | |
5731 | temp = savestring ("!"); | |
5732 | goto add_string; | |
5733 | } | |
5734 | else | |
5735 | { | |
5736 | #if !defined (HISTORY) | |
5737 | temp = savestring ("1"); | |
5738 | #else /* HISTORY */ | |
d233b485 | 5739 | temp = itos (prompt_history_number (orig_string)); |
726f6388 JA |
5740 | #endif /* HISTORY */ |
5741 | string--; /* add_string increments string again. */ | |
5742 | goto add_string; | |
5743 | } | |
ccc6cda3 | 5744 | } |
726f6388 JA |
5745 | if (c == '\\') |
5746 | { | |
5747 | c = *string; | |
5748 | ||
5749 | switch (c) | |
5750 | { | |
5751 | case '0': | |
5752 | case '1': | |
5753 | case '2': | |
5754 | case '3': | |
5755 | case '4': | |
5756 | case '5': | |
5757 | case '6': | |
5758 | case '7': | |
ccc6cda3 JA |
5759 | strncpy (octal_string, string, 3); |
5760 | octal_string[3] = '\0'; | |
726f6388 | 5761 | |
ccc6cda3 | 5762 | n = read_octal (octal_string); |
f73dda09 | 5763 | temp = (char *)xmalloc (3); |
726f6388 | 5764 | |
ccc6cda3 JA |
5765 | if (n == CTLESC || n == CTLNUL) |
5766 | { | |
ccc6cda3 JA |
5767 | temp[0] = CTLESC; |
5768 | temp[1] = n; | |
5769 | temp[2] = '\0'; | |
5770 | } | |
5771 | else if (n == -1) | |
5772 | { | |
5773 | temp[0] = '\\'; | |
5774 | temp[1] = '\0'; | |
5775 | } | |
5776 | else | |
5777 | { | |
ccc6cda3 JA |
5778 | temp[0] = n; |
5779 | temp[1] = '\0'; | |
5780 | } | |
726f6388 | 5781 | |
28ef6c31 JA |
5782 | for (c = 0; n != -1 && c < 3 && ISOCTAL (*string); c++) |
5783 | string++; | |
5784 | ||
7117c2d2 | 5785 | c = 0; /* tested at add_string: */ |
ccc6cda3 | 5786 | goto add_string; |
726f6388 | 5787 | |
726f6388 | 5788 | case 'd': |
7117c2d2 | 5789 | case 't': |
ccc6cda3 JA |
5790 | case 'T': |
5791 | case '@': | |
f73dda09 | 5792 | case 'A': |
726f6388 | 5793 | /* Make the current time/date into a string. */ |
7117c2d2 | 5794 | (void) time (&the_time); |
2bbe8058 CR |
5795 | #if defined (HAVE_TZSET) |
5796 | sv_tz ("TZ"); /* XXX -- just make sure */ | |
5797 | #endif | |
7117c2d2 JA |
5798 | tm = localtime (&the_time); |
5799 | ||
5800 | if (c == 'd') | |
5801 | n = strftime (timebuf, sizeof (timebuf), "%a %b %d", tm); | |
5802 | else if (c == 't') | |
5803 | n = strftime (timebuf, sizeof (timebuf), "%H:%M:%S", tm); | |
5804 | else if (c == 'T') | |
5805 | n = strftime (timebuf, sizeof (timebuf), "%I:%M:%S", tm); | |
5806 | else if (c == '@') | |
5807 | n = strftime (timebuf, sizeof (timebuf), "%I:%M %p", tm); | |
5808 | else if (c == 'A') | |
5809 | n = strftime (timebuf, sizeof (timebuf), "%H:%M", tm); | |
5810 | ||
b80f6443 JA |
5811 | if (n == 0) |
5812 | timebuf[0] = '\0'; | |
5813 | else | |
5814 | timebuf[sizeof(timebuf) - 1] = '\0'; | |
5815 | ||
7117c2d2 JA |
5816 | temp = savestring (timebuf); |
5817 | goto add_string; | |
726f6388 | 5818 | |
7117c2d2 JA |
5819 | case 'D': /* strftime format */ |
5820 | if (string[1] != '{') /* } */ | |
5821 | goto not_escape; | |
726f6388 | 5822 | |
7117c2d2 JA |
5823 | (void) time (&the_time); |
5824 | tm = localtime (&the_time); | |
5825 | string += 2; /* skip { */ | |
5826 | timefmt = xmalloc (strlen (string) + 3); | |
5827 | for (t = timefmt; *string && *string != '}'; ) | |
5828 | *t++ = *string++; | |
5829 | *t = '\0'; | |
5830 | c = *string; /* tested at add_string */ | |
5831 | if (timefmt[0] == '\0') | |
ccc6cda3 | 5832 | { |
7117c2d2 JA |
5833 | timefmt[0] = '%'; |
5834 | timefmt[1] = 'X'; /* locale-specific current time */ | |
5835 | timefmt[2] = '\0'; | |
ccc6cda3 | 5836 | } |
7117c2d2 JA |
5837 | n = strftime (timebuf, sizeof (timebuf), timefmt, tm); |
5838 | free (timefmt); | |
5839 | ||
b80f6443 JA |
5840 | if (n == 0) |
5841 | timebuf[0] = '\0'; | |
5842 | else | |
5843 | timebuf[sizeof(timebuf) - 1] = '\0'; | |
5844 | ||
7117c2d2 JA |
5845 | if (promptvars || posixly_correct) |
5846 | /* Make sure that expand_prompt_string is called with a | |
5847 | second argument of Q_DOUBLE_QUOTES if we use this | |
5848 | function here. */ | |
5849 | temp = sh_backslash_quote_for_double_quotes (timebuf); | |
5850 | else | |
5851 | temp = savestring (timebuf); | |
ccc6cda3 | 5852 | goto add_string; |
7117c2d2 | 5853 | |
726f6388 | 5854 | case 'n': |
f73dda09 | 5855 | temp = (char *)xmalloc (3); |
ccc6cda3 JA |
5856 | temp[0] = no_line_editing ? '\n' : '\r'; |
5857 | temp[1] = no_line_editing ? '\0' : '\n'; | |
5858 | temp[2] = '\0'; | |
726f6388 JA |
5859 | goto add_string; |
5860 | ||
5861 | case 's': | |
ccc6cda3 | 5862 | temp = base_pathname (shell_name); |
a0c0a00f CR |
5863 | /* Try to quote anything the user can set in the file system */ |
5864 | if (promptvars || posixly_correct) | |
5865 | temp = sh_backslash_quote_for_double_quotes (temp); | |
5866 | else | |
5867 | temp = savestring (temp); | |
ccc6cda3 JA |
5868 | goto add_string; |
5869 | ||
5870 | case 'v': | |
5871 | case 'V': | |
7117c2d2 | 5872 | temp = (char *)xmalloc (16); |
ccc6cda3 JA |
5873 | if (c == 'v') |
5874 | strcpy (temp, dist_version); | |
5875 | else | |
5876 | sprintf (temp, "%s.%d", dist_version, patch_level); | |
5877 | goto add_string; | |
5878 | ||
726f6388 JA |
5879 | case 'w': |
5880 | case 'W': | |
5881 | { | |
ccc6cda3 | 5882 | /* Use the value of PWD because it is much more efficient. */ |
0628567a | 5883 | char t_string[PATH_MAX]; |
e8ce775d | 5884 | int tlen; |
726f6388 JA |
5885 | |
5886 | temp = get_string_value ("PWD"); | |
5887 | ||
ccc6cda3 JA |
5888 | if (temp == 0) |
5889 | { | |
5890 | if (getcwd (t_string, sizeof(t_string)) == 0) | |
5891 | { | |
28ef6c31 | 5892 | t_string[0] = '.'; |
e8ce775d | 5893 | tlen = 1; |
ccc6cda3 | 5894 | } |
e8ce775d JA |
5895 | else |
5896 | tlen = strlen (t_string); | |
ccc6cda3 | 5897 | } |
726f6388 | 5898 | else |
e8ce775d JA |
5899 | { |
5900 | tlen = sizeof (t_string) - 1; | |
5901 | strncpy (t_string, temp, tlen); | |
5902 | } | |
5903 | t_string[tlen] = '\0'; | |
726f6388 | 5904 | |
0001803f CR |
5905 | #if defined (MACOSX) |
5906 | /* Convert from "fs" format to "input" format */ | |
5907 | temp = fnx_fromfs (t_string, strlen (t_string)); | |
5908 | if (temp != t_string) | |
5909 | strcpy (t_string, temp); | |
5910 | #endif | |
5911 | ||
28ef6c31 JA |
5912 | #define ROOT_PATH(x) ((x)[0] == '/' && (x)[1] == 0) |
5913 | #define DOUBLE_SLASH_ROOT(x) ((x)[0] == '/' && (x)[1] == '/' && (x)[2] == 0) | |
b80f6443 | 5914 | /* Abbreviate \W as ~ if $PWD == $HOME */ |
95732b49 | 5915 | if (c == 'W' && (((t = get_string_value ("HOME")) == 0) || STREQ (t, t_string) == 0)) |
726f6388 | 5916 | { |
28ef6c31 JA |
5917 | if (ROOT_PATH (t_string) == 0 && DOUBLE_SLASH_ROOT (t_string) == 0) |
5918 | { | |
5919 | t = strrchr (t_string, '/'); | |
5920 | if (t) | |
495aee44 | 5921 | memmove (t_string, t + 1, strlen (t)); /* strlen(t) to copy NULL */ |
28ef6c31 | 5922 | } |
726f6388 | 5923 | } |
28ef6c31 JA |
5924 | #undef ROOT_PATH |
5925 | #undef DOUBLE_SLASH_ROOT | |
726f6388 | 5926 | else |
ac50fbac CR |
5927 | { |
5928 | /* polite_directory_format is guaranteed to return a string | |
5929 | no longer than PATH_MAX - 1 characters. */ | |
5930 | temp = polite_directory_format (t_string); | |
5931 | if (temp != t_string) | |
5932 | strcpy (t_string, temp); | |
5933 | } | |
ccc6cda3 | 5934 | |
3185942a | 5935 | temp = trim_pathname (t_string, PATH_MAX - 1); |
ccc6cda3 JA |
5936 | /* If we're going to be expanding the prompt string later, |
5937 | quote the directory name. */ | |
5938 | if (promptvars || posixly_correct) | |
bb70624e | 5939 | /* Make sure that expand_prompt_string is called with a |
7117c2d2 | 5940 | second argument of Q_DOUBLE_QUOTES if we use this |
bb70624e | 5941 | function here. */ |
28ef6c31 | 5942 | temp = sh_backslash_quote_for_double_quotes (t_string); |
ccc6cda3 JA |
5943 | else |
5944 | temp = savestring (t_string); | |
5945 | ||
726f6388 JA |
5946 | goto add_string; |
5947 | } | |
ccc6cda3 | 5948 | |
726f6388 | 5949 | case 'u': |
bb70624e JA |
5950 | if (current_user.user_name == 0) |
5951 | get_current_user_info (); | |
ccc6cda3 JA |
5952 | temp = savestring (current_user.user_name); |
5953 | goto add_string; | |
726f6388 JA |
5954 | |
5955 | case 'h': | |
ccc6cda3 | 5956 | case 'H': |
a0c0a00f CR |
5957 | t_host = savestring (current_host_name); |
5958 | if (c == 'h' && (t = (char *)strchr (t_host, '.'))) | |
ccc6cda3 | 5959 | *t = '\0'; |
a0c0a00f CR |
5960 | if (promptvars || posixly_correct) |
5961 | /* Make sure that expand_prompt_string is called with a | |
5962 | second argument of Q_DOUBLE_QUOTES if we use this | |
5963 | function here. */ | |
5964 | temp = sh_backslash_quote_for_double_quotes (t_host); | |
5965 | else | |
5966 | temp = savestring (t_host); | |
5967 | free (t_host); | |
ccc6cda3 | 5968 | goto add_string; |
726f6388 JA |
5969 | |
5970 | case '#': | |
d233b485 CR |
5971 | n = current_command_number; |
5972 | /* If we have already incremented current_command_number (PS4, | |
5973 | ${var@P}), compensate */ | |
5974 | if (orig_string != ps0_prompt && orig_string != ps1_prompt && orig_string != ps2_prompt) | |
5975 | n--; | |
5976 | temp = itos (n); | |
ccc6cda3 | 5977 | goto add_string; |
726f6388 JA |
5978 | |
5979 | case '!': | |
726f6388 | 5980 | #if !defined (HISTORY) |
ccc6cda3 | 5981 | temp = savestring ("1"); |
726f6388 | 5982 | #else /* HISTORY */ |
d233b485 | 5983 | temp = itos (prompt_history_number (orig_string)); |
726f6388 | 5984 | #endif /* HISTORY */ |
ccc6cda3 | 5985 | goto add_string; |
726f6388 JA |
5986 | |
5987 | case '$': | |
f73dda09 | 5988 | t = temp = (char *)xmalloc (3); |
b72432fd JA |
5989 | if ((promptvars || posixly_correct) && (current_user.euid != 0)) |
5990 | *t++ = '\\'; | |
5991 | *t++ = current_user.euid == 0 ? '#' : '$'; | |
5992 | *t = '\0'; | |
726f6388 JA |
5993 | goto add_string; |
5994 | ||
bb70624e JA |
5995 | case 'j': |
5996 | temp = itos (count_all_jobs ()); | |
5997 | goto add_string; | |
5998 | ||
5999 | case 'l': | |
6000 | #if defined (HAVE_TTYNAME) | |
6001 | temp = (char *)ttyname (fileno (stdin)); | |
6002 | t = temp ? base_pathname (temp) : "tty"; | |
6003 | temp = savestring (t); | |
6004 | #else | |
6005 | temp = savestring ("tty"); | |
6006 | #endif /* !HAVE_TTYNAME */ | |
6007 | goto add_string; | |
6008 | ||
726f6388 JA |
6009 | #if defined (READLINE) |
6010 | case '[': | |
6011 | case ']': | |
b80f6443 JA |
6012 | if (no_line_editing) |
6013 | { | |
6014 | string++; | |
6015 | break; | |
6016 | } | |
f73dda09 | 6017 | temp = (char *)xmalloc (3); |
0628567a JA |
6018 | n = (c == '[') ? RL_PROMPT_START_IGNORE : RL_PROMPT_END_IGNORE; |
6019 | i = 0; | |
6020 | if (n == CTLESC || n == CTLNUL) | |
6021 | temp[i++] = CTLESC; | |
6022 | temp[i++] = n; | |
6023 | temp[i] = '\0'; | |
726f6388 | 6024 | goto add_string; |
ccc6cda3 | 6025 | #endif /* READLINE */ |
726f6388 JA |
6026 | |
6027 | case '\\': | |
ccc6cda3 JA |
6028 | case 'a': |
6029 | case 'e': | |
7117c2d2 | 6030 | case 'r': |
f73dda09 | 6031 | temp = (char *)xmalloc (2); |
7117c2d2 JA |
6032 | if (c == 'a') |
6033 | temp[0] = '\07'; | |
6034 | else if (c == 'e') | |
6035 | temp[0] = '\033'; | |
6036 | else if (c == 'r') | |
6037 | temp[0] = '\r'; | |
6038 | else /* (c == '\\') */ | |
6039 | temp[0] = c; | |
ccc6cda3 | 6040 | temp[1] = '\0'; |
726f6388 JA |
6041 | goto add_string; |
6042 | ||
6043 | default: | |
7117c2d2 | 6044 | not_escape: |
f73dda09 | 6045 | temp = (char *)xmalloc (3); |
ccc6cda3 | 6046 | temp[0] = '\\'; |
726f6388 | 6047 | temp[1] = c; |
ccc6cda3 | 6048 | temp[2] = '\0'; |
726f6388 JA |
6049 | |
6050 | add_string: | |
6051 | if (c) | |
6052 | string++; | |
6053 | result = | |
6054 | sub_append_string (temp, result, &result_index, &result_size); | |
ccc6cda3 | 6055 | temp = (char *)NULL; /* Freed in sub_append_string (). */ |
726f6388 JA |
6056 | result[result_index] = '\0'; |
6057 | break; | |
6058 | } | |
6059 | } | |
6060 | else | |
6061 | { | |
ccc6cda3 | 6062 | RESIZE_MALLOCED_BUFFER (result, result_index, 3, result_size, PROMPT_GROWTH); |
a0c0a00f CR |
6063 | /* dequote_string should take care of removing this if we are not |
6064 | performing the rest of the word expansions. */ | |
6065 | if (c == CTLESC || c == CTLNUL) | |
6066 | result[result_index++] = CTLESC; | |
726f6388 JA |
6067 | result[result_index++] = c; |
6068 | result[result_index] = '\0'; | |
6069 | } | |
6070 | } | |
6071 | #else /* !PROMPT_STRING_DECODE */ | |
6072 | result = savestring (string); | |
6073 | #endif /* !PROMPT_STRING_DECODE */ | |
6074 | ||
ccc6cda3 JA |
6075 | /* Save the delimiter stack and point `dstack' to temp space so any |
6076 | command substitutions in the prompt string won't result in screwing | |
6077 | up the parser's quoting state. */ | |
6078 | save_dstack = dstack; | |
6079 | dstack = temp_dstack; | |
6080 | dstack.delimiter_depth = 0; | |
6081 | ||
726f6388 JA |
6082 | /* Perform variable and parameter expansion and command substitution on |
6083 | the prompt string. */ | |
ccc6cda3 JA |
6084 | if (promptvars || posixly_correct) |
6085 | { | |
f73dda09 | 6086 | last_exit_value = last_command_exit_value; |
0001803f | 6087 | last_comsub_pid = last_command_subst_pid; |
f1be666c | 6088 | list = expand_prompt_string (result, Q_DOUBLE_QUOTES, 0); |
ccc6cda3 JA |
6089 | free (result); |
6090 | result = string_list (list); | |
6091 | dispose_words (list); | |
f73dda09 | 6092 | last_command_exit_value = last_exit_value; |
0001803f | 6093 | last_command_subst_pid = last_comsub_pid; |
ccc6cda3 JA |
6094 | } |
6095 | else | |
6096 | { | |
6097 | t = dequote_string (result); | |
6098 | free (result); | |
6099 | result = t; | |
6100 | } | |
6101 | ||
6102 | dstack = save_dstack; | |
726f6388 JA |
6103 | |
6104 | return (result); | |
6105 | } | |
6106 | ||
7117c2d2 JA |
6107 | /************************************************ |
6108 | * * | |
6109 | * ERROR HANDLING * | |
6110 | * * | |
6111 | ************************************************/ | |
6112 | ||
726f6388 JA |
6113 | /* Report a syntax error, and restart the parser. Call here for fatal |
6114 | errors. */ | |
ccc6cda3 | 6115 | int |
f73dda09 JA |
6116 | yyerror (msg) |
6117 | const char *msg; | |
726f6388 JA |
6118 | { |
6119 | report_syntax_error ((char *)NULL); | |
6120 | reset_parser (); | |
ccc6cda3 | 6121 | return (0); |
726f6388 JA |
6122 | } |
6123 | ||
7117c2d2 | 6124 | static char * |
0628567a JA |
6125 | error_token_from_token (tok) |
6126 | int tok; | |
7117c2d2 JA |
6127 | { |
6128 | char *t; | |
6129 | ||
0628567a | 6130 | if (t = find_token_in_alist (tok, word_token_alist, 0)) |
7117c2d2 JA |
6131 | return t; |
6132 | ||
0628567a | 6133 | if (t = find_token_in_alist (tok, other_token_alist, 0)) |
7117c2d2 JA |
6134 | return t; |
6135 | ||
6136 | t = (char *)NULL; | |
6137 | /* This stuff is dicy and needs closer inspection */ | |
6138 | switch (current_token) | |
6139 | { | |
6140 | case WORD: | |
6141 | case ASSIGNMENT_WORD: | |
6142 | if (yylval.word) | |
6143 | t = savestring (yylval.word->word); | |
6144 | break; | |
6145 | case NUMBER: | |
6146 | t = itos (yylval.number); | |
6147 | break; | |
6148 | case ARITH_CMD: | |
6149 | if (yylval.word_list) | |
6150 | t = string_list (yylval.word_list); | |
6151 | break; | |
6152 | case ARITH_FOR_EXPRS: | |
6153 | if (yylval.word_list) | |
6154 | t = string_list_internal (yylval.word_list, " ; "); | |
6155 | break; | |
6156 | case COND_CMD: | |
6157 | t = (char *)NULL; /* punt */ | |
6158 | break; | |
6159 | } | |
6160 | ||
6161 | return t; | |
6162 | } | |
6163 | ||
6164 | static char * | |
6165 | error_token_from_text () | |
6166 | { | |
6167 | char *msg, *t; | |
6168 | int token_end, i; | |
6169 | ||
6170 | t = shell_input_line; | |
6171 | i = shell_input_line_index; | |
6172 | token_end = 0; | |
6173 | msg = (char *)NULL; | |
6174 | ||
6175 | if (i && t[i] == '\0') | |
6176 | i--; | |
6177 | ||
6178 | while (i && (whitespace (t[i]) || t[i] == '\n')) | |
6179 | i--; | |
6180 | ||
6181 | if (i) | |
6182 | token_end = i + 1; | |
6183 | ||
6184 | while (i && (member (t[i], " \n\t;|&") == 0)) | |
6185 | i--; | |
6186 | ||
6187 | while (i != token_end && (whitespace (t[i]) || t[i] == '\n')) | |
6188 | i++; | |
6189 | ||
6190 | /* Return our idea of the offending token. */ | |
6191 | if (token_end || (i == 0 && token_end == 0)) | |
6192 | { | |
6193 | if (token_end) | |
6194 | msg = substring (t, i, token_end); | |
6195 | else /* one-character token */ | |
6196 | { | |
6197 | msg = (char *)xmalloc (2); | |
6198 | msg[0] = t[i]; | |
6199 | msg[1] = '\0'; | |
6200 | } | |
6201 | } | |
6202 | ||
6203 | return (msg); | |
6204 | } | |
6205 | ||
6206 | static void | |
6207 | print_offending_line () | |
6208 | { | |
6209 | char *msg; | |
6210 | int token_end; | |
6211 | ||
6212 | msg = savestring (shell_input_line); | |
6213 | token_end = strlen (msg); | |
6214 | while (token_end && msg[token_end - 1] == '\n') | |
6215 | msg[--token_end] = '\0'; | |
6216 | ||
6217 | parser_error (line_number, "`%s'", msg); | |
6218 | free (msg); | |
6219 | } | |
6220 | ||
726f6388 JA |
6221 | /* Report a syntax error with line numbers, etc. |
6222 | Call here for recoverable errors. If you have a message to print, | |
6223 | then place it in MESSAGE, otherwise pass NULL and this will figure | |
6224 | out an appropriate message for you. */ | |
6225 | static void | |
6226 | report_syntax_error (message) | |
6227 | char *message; | |
6228 | { | |
495aee44 | 6229 | char *msg, *p; |
ccc6cda3 | 6230 | |
726f6388 JA |
6231 | if (message) |
6232 | { | |
ccc6cda3 JA |
6233 | parser_error (line_number, "%s", message); |
6234 | if (interactive && EOF_Reached) | |
6235 | EOF_Reached = 0; | |
0001803f | 6236 | last_command_exit_value = parse_and_execute_level ? EX_BADSYNTAX : EX_BADUSAGE; |
726f6388 JA |
6237 | return; |
6238 | } | |
6239 | ||
ccc6cda3 | 6240 | /* If the line of input we're reading is not null, try to find the |
7117c2d2 JA |
6241 | objectionable token. First, try to figure out what token the |
6242 | parser's complaining about by looking at current_token. */ | |
6243 | if (current_token != 0 && EOF_Reached == 0 && (msg = error_token_from_token (current_token))) | |
726f6388 | 6244 | { |
495aee44 CR |
6245 | if (ansic_shouldquote (msg)) |
6246 | { | |
6247 | p = ansic_quote (msg, 0, NULL); | |
6248 | free (msg); | |
6249 | msg = p; | |
6250 | } | |
b80f6443 | 6251 | parser_error (line_number, _("syntax error near unexpected token `%s'"), msg); |
7117c2d2 | 6252 | free (msg); |
726f6388 | 6253 | |
7117c2d2 JA |
6254 | if (interactive == 0) |
6255 | print_offending_line (); | |
726f6388 | 6256 | |
0001803f | 6257 | last_command_exit_value = parse_and_execute_level ? EX_BADSYNTAX : EX_BADUSAGE; |
7117c2d2 JA |
6258 | return; |
6259 | } | |
726f6388 | 6260 | |
7117c2d2 JA |
6261 | /* If looking at the current token doesn't prove fruitful, try to find the |
6262 | offending token by analyzing the text of the input line near the current | |
6263 | input line index and report what we find. */ | |
6264 | if (shell_input_line && *shell_input_line) | |
6265 | { | |
6266 | msg = error_token_from_text (); | |
6267 | if (msg) | |
726f6388 | 6268 | { |
b80f6443 | 6269 | parser_error (line_number, _("syntax error near `%s'"), msg); |
7117c2d2 | 6270 | free (msg); |
726f6388 JA |
6271 | } |
6272 | ||
ccc6cda3 JA |
6273 | /* If not interactive, print the line containing the error. */ |
6274 | if (interactive == 0) | |
7117c2d2 | 6275 | print_offending_line (); |
726f6388 JA |
6276 | } |
6277 | else | |
6278 | { | |
b80f6443 | 6279 | msg = EOF_Reached ? _("syntax error: unexpected end of file") : _("syntax error"); |
ccc6cda3 JA |
6280 | parser_error (line_number, "%s", msg); |
6281 | /* When the shell is interactive, this file uses EOF_Reached | |
6282 | only for error reporting. Other mechanisms are used to | |
6283 | decide whether or not to exit. */ | |
6284 | if (interactive && EOF_Reached) | |
6285 | EOF_Reached = 0; | |
726f6388 | 6286 | } |
7117c2d2 | 6287 | |
0001803f | 6288 | last_command_exit_value = parse_and_execute_level ? EX_BADSYNTAX : EX_BADUSAGE; |
726f6388 JA |
6289 | } |
6290 | ||
6291 | /* ??? Needed function. ??? We have to be able to discard the constructs | |
6292 | created during parsing. In the case of error, we want to return | |
6293 | allocated objects to the memory pool. In the case of no error, we want | |
6294 | to throw away the information about where the allocated objects live. | |
7117c2d2 | 6295 | (dispose_command () will actually free the command.) */ |
ccc6cda3 | 6296 | static void |
726f6388 JA |
6297 | discard_parser_constructs (error_p) |
6298 | int error_p; | |
6299 | { | |
6300 | } | |
ccc6cda3 | 6301 | |
7117c2d2 JA |
6302 | /************************************************ |
6303 | * * | |
6304 | * EOF HANDLING * | |
6305 | * * | |
6306 | ************************************************/ | |
6307 | ||
726f6388 JA |
6308 | /* Do that silly `type "bye" to exit' stuff. You know, "ignoreeof". */ |
6309 | ||
6310 | /* A flag denoting whether or not ignoreeof is set. */ | |
6311 | int ignoreeof = 0; | |
6312 | ||
6313 | /* The number of times that we have encountered an EOF character without | |
6314 | another character intervening. When this gets above the limit, the | |
6315 | shell terminates. */ | |
6316 | int eof_encountered = 0; | |
6317 | ||
6318 | /* The limit for eof_encountered. */ | |
6319 | int eof_encountered_limit = 10; | |
6320 | ||
6321 | /* If we have EOF as the only input unit, this user wants to leave | |
6322 | the shell. If the shell is not interactive, then just leave. | |
6323 | Otherwise, if ignoreeof is set, and we haven't done this the | |
6324 | required number of times in a row, print a message. */ | |
6325 | static void | |
6326 | handle_eof_input_unit () | |
6327 | { | |
6328 | if (interactive) | |
6329 | { | |
6330 | /* shell.c may use this to decide whether or not to write out the | |
6331 | history, among other things. We use it only for error reporting | |
6332 | in this file. */ | |
6333 | if (EOF_Reached) | |
6334 | EOF_Reached = 0; | |
6335 | ||
6336 | /* If the user wants to "ignore" eof, then let her do so, kind of. */ | |
6337 | if (ignoreeof) | |
6338 | { | |
6339 | if (eof_encountered < eof_encountered_limit) | |
6340 | { | |
b80f6443 | 6341 | fprintf (stderr, _("Use \"%s\" to leave the shell.\n"), |
726f6388 JA |
6342 | login_shell ? "logout" : "exit"); |
6343 | eof_encountered++; | |
7117c2d2 JA |
6344 | /* Reset the parsing state. */ |
6345 | last_read_token = current_token = '\n'; | |
726f6388 JA |
6346 | /* Reset the prompt string to be $PS1. */ |
6347 | prompt_string_pointer = (char **)NULL; | |
6348 | prompt_again (); | |
726f6388 | 6349 | return; |
ccc6cda3 | 6350 | } |
726f6388 JA |
6351 | } |
6352 | ||
6353 | /* In this case EOF should exit the shell. Do it now. */ | |
6354 | reset_parser (); | |
6355 | exit_builtin ((WORD_LIST *)NULL); | |
6356 | } | |
6357 | else | |
6358 | { | |
6359 | /* We don't write history files, etc., for non-interactive shells. */ | |
6360 | EOF_Reached = 1; | |
6361 | } | |
6362 | } | |
bb70624e | 6363 | |
7117c2d2 JA |
6364 | /************************************************ |
6365 | * * | |
6366 | * STRING PARSING FUNCTIONS * | |
6367 | * * | |
6368 | ************************************************/ | |
6369 | ||
6370 | /* It's very important that these two functions treat the characters | |
6371 | between ( and ) identically. */ | |
6372 | ||
bb70624e JA |
6373 | static WORD_LIST parse_string_error; |
6374 | ||
6375 | /* Take a string and run it through the shell parser, returning the | |
6376 | resultant word list. Used by compound array assignment. */ | |
6377 | WORD_LIST * | |
b80f6443 | 6378 | parse_string_to_word_list (s, flags, whom) |
f73dda09 | 6379 | char *s; |
b80f6443 | 6380 | int flags; |
f73dda09 | 6381 | const char *whom; |
bb70624e JA |
6382 | { |
6383 | WORD_LIST *wl; | |
7117c2d2 | 6384 | int tok, orig_current_token, orig_line_number, orig_input_terminator; |
28ef6c31 | 6385 | int orig_line_count; |
7117c2d2 | 6386 | int old_echo_input, old_expand_aliases; |
bb70624e JA |
6387 | #if defined (HISTORY) |
6388 | int old_remember_on_history, old_history_expansion_inhibited; | |
6389 | #endif | |
6390 | ||
6391 | #if defined (HISTORY) | |
6392 | old_remember_on_history = remember_on_history; | |
6393 | # if defined (BANG_HISTORY) | |
6394 | old_history_expansion_inhibited = history_expansion_inhibited; | |
6395 | # endif | |
6396 | bash_history_disable (); | |
6397 | #endif | |
6398 | ||
6399 | orig_line_number = line_number; | |
28ef6c31 | 6400 | orig_line_count = current_command_line_count; |
bb70624e | 6401 | orig_input_terminator = shell_input_line_terminator; |
7117c2d2 JA |
6402 | old_echo_input = echo_input_at_read; |
6403 | old_expand_aliases = expand_aliases; | |
bb70624e JA |
6404 | |
6405 | push_stream (1); | |
7117c2d2 | 6406 | last_read_token = WORD; /* WORD to allow reserved words here */ |
28ef6c31 | 6407 | current_command_line_count = 0; |
7117c2d2 | 6408 | echo_input_at_read = expand_aliases = 0; |
bb70624e JA |
6409 | |
6410 | with_input_from_string (s, whom); | |
6411 | wl = (WORD_LIST *)NULL; | |
b80f6443 JA |
6412 | |
6413 | if (flags & 1) | |
3185942a | 6414 | parser_state |= PST_COMPASSIGN|PST_REPARSE; |
b80f6443 | 6415 | |
bb70624e JA |
6416 | while ((tok = read_token (READ)) != yacc_EOF) |
6417 | { | |
6418 | if (tok == '\n' && *bash_input.location.string == '\0') | |
6419 | break; | |
28ef6c31 JA |
6420 | if (tok == '\n') /* Allow newlines in compound assignments */ |
6421 | continue; | |
bb70624e JA |
6422 | if (tok != WORD && tok != ASSIGNMENT_WORD) |
6423 | { | |
6424 | line_number = orig_line_number + line_number - 1; | |
7117c2d2 JA |
6425 | orig_current_token = current_token; |
6426 | current_token = tok; | |
95732b49 | 6427 | yyerror (NULL); /* does the right thing */ |
7117c2d2 | 6428 | current_token = orig_current_token; |
bb70624e JA |
6429 | if (wl) |
6430 | dispose_words (wl); | |
6431 | wl = &parse_string_error; | |
6432 | break; | |
6433 | } | |
6434 | wl = make_word_list (yylval.word, wl); | |
6435 | } | |
6436 | ||
6437 | last_read_token = '\n'; | |
6438 | pop_stream (); | |
6439 | ||
6440 | #if defined (HISTORY) | |
6441 | remember_on_history = old_remember_on_history; | |
6442 | # if defined (BANG_HISTORY) | |
6443 | history_expansion_inhibited = old_history_expansion_inhibited; | |
6444 | # endif /* BANG_HISTORY */ | |
6445 | #endif /* HISTORY */ | |
6446 | ||
7117c2d2 JA |
6447 | echo_input_at_read = old_echo_input; |
6448 | expand_aliases = old_expand_aliases; | |
6449 | ||
28ef6c31 | 6450 | current_command_line_count = orig_line_count; |
bb70624e JA |
6451 | shell_input_line_terminator = orig_input_terminator; |
6452 | ||
b80f6443 | 6453 | if (flags & 1) |
3185942a | 6454 | parser_state &= ~(PST_COMPASSIGN|PST_REPARSE); |
b80f6443 | 6455 | |
bb70624e JA |
6456 | if (wl == &parse_string_error) |
6457 | { | |
6458 | last_command_exit_value = EXECUTION_FAILURE; | |
6459 | if (interactive_shell == 0 && posixly_correct) | |
6460 | jump_to_top_level (FORCE_EOF); | |
6461 | else | |
6462 | jump_to_top_level (DISCARD); | |
6463 | } | |
6464 | ||
6465 | return (REVERSE_LIST (wl, WORD_LIST *)); | |
6466 | } | |
7117c2d2 JA |
6467 | |
6468 | static char * | |
6469 | parse_compound_assignment (retlenp) | |
6470 | int *retlenp; | |
6471 | { | |
6472 | WORD_LIST *wl, *rl; | |
0628567a | 6473 | int tok, orig_line_number, orig_token_size, orig_last_token, assignok; |
7117c2d2 JA |
6474 | char *saved_token, *ret; |
6475 | ||
6476 | saved_token = token; | |
6477 | orig_token_size = token_buffer_size; | |
6478 | orig_line_number = line_number; | |
0628567a | 6479 | orig_last_token = last_read_token; |
7117c2d2 JA |
6480 | |
6481 | last_read_token = WORD; /* WORD to allow reserved words here */ | |
6482 | ||
6483 | token = (char *)NULL; | |
6484 | token_buffer_size = 0; | |
6485 | ||
0628567a JA |
6486 | assignok = parser_state&PST_ASSIGNOK; /* XXX */ |
6487 | ||
7117c2d2 | 6488 | wl = (WORD_LIST *)NULL; /* ( */ |
b80f6443 JA |
6489 | parser_state |= PST_COMPASSIGN; |
6490 | ||
7117c2d2 JA |
6491 | while ((tok = read_token (READ)) != ')') |
6492 | { | |
6493 | if (tok == '\n') /* Allow newlines in compound assignments */ | |
b80f6443 JA |
6494 | { |
6495 | if (SHOULD_PROMPT ()) | |
6496 | prompt_again (); | |
6497 | continue; | |
6498 | } | |
7117c2d2 JA |
6499 | if (tok != WORD && tok != ASSIGNMENT_WORD) |
6500 | { | |
6501 | current_token = tok; /* for error reporting */ | |
6502 | if (tok == yacc_EOF) /* ( */ | |
b80f6443 | 6503 | parser_error (orig_line_number, _("unexpected EOF while looking for matching `)'")); |
7117c2d2 | 6504 | else |
95732b49 | 6505 | yyerror(NULL); /* does the right thing */ |
7117c2d2 JA |
6506 | if (wl) |
6507 | dispose_words (wl); | |
6508 | wl = &parse_string_error; | |
6509 | break; | |
6510 | } | |
6511 | wl = make_word_list (yylval.word, wl); | |
6512 | } | |
6513 | ||
6514 | FREE (token); | |
6515 | token = saved_token; | |
6516 | token_buffer_size = orig_token_size; | |
6517 | ||
b80f6443 JA |
6518 | parser_state &= ~PST_COMPASSIGN; |
6519 | ||
7117c2d2 JA |
6520 | if (wl == &parse_string_error) |
6521 | { | |
6522 | last_command_exit_value = EXECUTION_FAILURE; | |
6523 | last_read_token = '\n'; /* XXX */ | |
6524 | if (interactive_shell == 0 && posixly_correct) | |
6525 | jump_to_top_level (FORCE_EOF); | |
6526 | else | |
6527 | jump_to_top_level (DISCARD); | |
6528 | } | |
6529 | ||
0628567a JA |
6530 | last_read_token = orig_last_token; /* XXX - was WORD? */ |
6531 | ||
7117c2d2 JA |
6532 | if (wl) |
6533 | { | |
6534 | rl = REVERSE_LIST (wl, WORD_LIST *); | |
6535 | ret = string_list (rl); | |
6536 | dispose_words (rl); | |
6537 | } | |
6538 | else | |
6539 | ret = (char *)NULL; | |
6540 | ||
6541 | if (retlenp) | |
6542 | *retlenp = (ret && *ret) ? strlen (ret) : 0; | |
0628567a JA |
6543 | |
6544 | if (assignok) | |
6545 | parser_state |= PST_ASSIGNOK; | |
6546 | ||
7117c2d2 JA |
6547 | return ret; |
6548 | } | |
6549 | ||
b80f6443 JA |
6550 | /************************************************ |
6551 | * * | |
6552 | * SAVING AND RESTORING PARTIAL PARSE STATE * | |
6553 | * * | |
6554 | ************************************************/ | |
6555 | ||
6556 | sh_parser_state_t * | |
6557 | save_parser_state (ps) | |
6558 | sh_parser_state_t *ps; | |
6559 | { | |
b80f6443 | 6560 | if (ps == 0) |
95732b49 | 6561 | ps = (sh_parser_state_t *)xmalloc (sizeof (sh_parser_state_t)); |
b80f6443 JA |
6562 | if (ps == 0) |
6563 | return ((sh_parser_state_t *)NULL); | |
6564 | ||
6565 | ps->parser_state = parser_state; | |
6566 | ps->token_state = save_token_state (); | |
6567 | ||
6568 | ps->input_line_terminator = shell_input_line_terminator; | |
6569 | ps->eof_encountered = eof_encountered; | |
6570 | ||
495aee44 CR |
6571 | ps->prompt_string_pointer = prompt_string_pointer; |
6572 | ||
b80f6443 JA |
6573 | ps->current_command_line_count = current_command_line_count; |
6574 | ||
6575 | #if defined (HISTORY) | |
6576 | ps->remember_on_history = remember_on_history; | |
6577 | # if defined (BANG_HISTORY) | |
6578 | ps->history_expansion_inhibited = history_expansion_inhibited; | |
6579 | # endif | |
6580 | #endif | |
6581 | ||
6582 | ps->last_command_exit_value = last_command_exit_value; | |
6583 | #if defined (ARRAY_VARS) | |
495aee44 | 6584 | ps->pipestatus = save_pipestatus_array (); |
b80f6443 JA |
6585 | #endif |
6586 | ||
6587 | ps->last_shell_builtin = last_shell_builtin; | |
6588 | ps->this_shell_builtin = this_shell_builtin; | |
6589 | ||
6590 | ps->expand_aliases = expand_aliases; | |
6591 | ps->echo_input_at_read = echo_input_at_read; | |
daefb2c5 | 6592 | ps->need_here_doc = need_here_doc; |
a0c0a00f CR |
6593 | ps->here_doc_first_line = here_doc_first_line; |
6594 | ||
a0c0a00f CR |
6595 | if (need_here_doc == 0) |
6596 | ps->redir_stack[0] = 0; | |
6597 | else | |
6598 | memcpy (ps->redir_stack, redir_stack, sizeof (redir_stack[0]) * HEREDOC_MAX); | |
b80f6443 | 6599 | |
b4839c27 CR |
6600 | ps->token = token; |
6601 | ps->token_buffer_size = token_buffer_size; | |
6602 | /* Force reallocation on next call to read_token_word */ | |
6603 | token = 0; | |
6604 | token_buffer_size = 0; | |
6605 | ||
b80f6443 JA |
6606 | return (ps); |
6607 | } | |
6608 | ||
6609 | void | |
6610 | restore_parser_state (ps) | |
6611 | sh_parser_state_t *ps; | |
6612 | { | |
a0c0a00f CR |
6613 | int i; |
6614 | ||
b80f6443 JA |
6615 | if (ps == 0) |
6616 | return; | |
6617 | ||
6618 | parser_state = ps->parser_state; | |
6619 | if (ps->token_state) | |
6620 | { | |
6621 | restore_token_state (ps->token_state); | |
6622 | free (ps->token_state); | |
6623 | } | |
6624 | ||
6625 | shell_input_line_terminator = ps->input_line_terminator; | |
6626 | eof_encountered = ps->eof_encountered; | |
6627 | ||
495aee44 CR |
6628 | prompt_string_pointer = ps->prompt_string_pointer; |
6629 | ||
b80f6443 JA |
6630 | current_command_line_count = ps->current_command_line_count; |
6631 | ||
6632 | #if defined (HISTORY) | |
6633 | remember_on_history = ps->remember_on_history; | |
6634 | # if defined (BANG_HISTORY) | |
6635 | history_expansion_inhibited = ps->history_expansion_inhibited; | |
6636 | # endif | |
6637 | #endif | |
6638 | ||
6639 | last_command_exit_value = ps->last_command_exit_value; | |
6640 | #if defined (ARRAY_VARS) | |
495aee44 | 6641 | restore_pipestatus_array (ps->pipestatus); |
b80f6443 JA |
6642 | #endif |
6643 | ||
6644 | last_shell_builtin = ps->last_shell_builtin; | |
6645 | this_shell_builtin = ps->this_shell_builtin; | |
6646 | ||
6647 | expand_aliases = ps->expand_aliases; | |
6648 | echo_input_at_read = ps->echo_input_at_read; | |
daefb2c5 | 6649 | need_here_doc = ps->need_here_doc; |
a0c0a00f CR |
6650 | here_doc_first_line = ps->here_doc_first_line; |
6651 | ||
6652 | #if 0 | |
6653 | for (i = 0; i < HEREDOC_MAX; i++) | |
6654 | redir_stack[i] = ps->redir_stack[i]; | |
6655 | #else | |
6656 | if (need_here_doc == 0) | |
6657 | redir_stack[0] = 0; | |
6658 | else | |
6659 | memcpy (redir_stack, ps->redir_stack, sizeof (redir_stack[0]) * HEREDOC_MAX); | |
6660 | #endif | |
b4839c27 CR |
6661 | |
6662 | FREE (token); | |
6663 | token = ps->token; | |
6664 | token_buffer_size = ps->token_buffer_size; | |
6665 | } | |
6666 | ||
6667 | sh_input_line_state_t * | |
6668 | save_input_line_state (ls) | |
6669 | sh_input_line_state_t *ls; | |
6670 | { | |
6671 | if (ls == 0) | |
6672 | ls = (sh_input_line_state_t *)xmalloc (sizeof (sh_input_line_state_t)); | |
6673 | if (ls == 0) | |
6674 | return ((sh_input_line_state_t *)NULL); | |
6675 | ||
6676 | ls->input_line = shell_input_line; | |
6677 | ls->input_line_size = shell_input_line_size; | |
6678 | ls->input_line_len = shell_input_line_len; | |
6679 | ls->input_line_index = shell_input_line_index; | |
6680 | ||
6681 | /* force reallocation */ | |
6682 | shell_input_line = 0; | |
6683 | shell_input_line_size = shell_input_line_len = shell_input_line_index = 0; | |
ac50fbac CR |
6684 | |
6685 | return ls; | |
b4839c27 CR |
6686 | } |
6687 | ||
6688 | void | |
6689 | restore_input_line_state (ls) | |
6690 | sh_input_line_state_t *ls; | |
6691 | { | |
6692 | FREE (shell_input_line); | |
6693 | shell_input_line = ls->input_line; | |
6694 | shell_input_line_size = ls->input_line_size; | |
6695 | shell_input_line_len = ls->input_line_len; | |
6696 | shell_input_line_index = ls->input_line_index; | |
6697 | ||
6698 | set_line_mbstate (); | |
b80f6443 JA |
6699 | } |
6700 | ||
7117c2d2 JA |
6701 | /************************************************ |
6702 | * * | |
6703 | * MULTIBYTE CHARACTER HANDLING * | |
6704 | * * | |
6705 | ************************************************/ | |
6706 | ||
6707 | #if defined (HANDLE_MULTIBYTE) | |
d233b485 CR |
6708 | |
6709 | /* We don't let the property buffer get larger than this unless the line is */ | |
6710 | #define MAX_PROPSIZE 32768 | |
6711 | ||
7117c2d2 JA |
6712 | static void |
6713 | set_line_mbstate () | |
6714 | { | |
ac50fbac CR |
6715 | int c; |
6716 | size_t i, previ, len; | |
7117c2d2 JA |
6717 | mbstate_t mbs, prevs; |
6718 | size_t mbclen; | |
6719 | ||
6720 | if (shell_input_line == NULL) | |
6721 | return; | |
6722 | len = strlen (shell_input_line); /* XXX - shell_input_line_len ? */ | |
d233b485 CR |
6723 | if (len == 0) |
6724 | return; | |
6725 | if (shell_input_line_propsize >= MAX_PROPSIZE && len < MAX_PROPSIZE>>1) | |
6726 | { | |
6727 | free (shell_input_line_property); | |
6728 | shell_input_line_property = 0; | |
6729 | shell_input_line_propsize = 0; | |
6730 | } | |
6731 | if (len+1 > shell_input_line_propsize) | |
6732 | { | |
6733 | shell_input_line_propsize = len + 1; | |
6734 | shell_input_line_property = (char *)xrealloc (shell_input_line_property, shell_input_line_propsize); | |
6735 | } | |
7117c2d2 | 6736 | |
d233b485 CR |
6737 | /* XXX - use whether or not we are in a UTF-8 locale to avoid calls to |
6738 | mbrlen */ | |
7117c2d2 JA |
6739 | memset (&prevs, '\0', sizeof (mbstate_t)); |
6740 | for (i = previ = 0; i < len; i++) | |
6741 | { | |
6742 | mbs = prevs; | |
6743 | ||
b80f6443 JA |
6744 | c = shell_input_line[i]; |
6745 | if (c == EOF) | |
7117c2d2 | 6746 | { |
ac50fbac | 6747 | size_t j; |
7117c2d2 JA |
6748 | for (j = i; j < len; j++) |
6749 | shell_input_line_property[j] = 1; | |
6750 | break; | |
6751 | } | |
6752 | ||
d233b485 CR |
6753 | /* I'd love to take more advantage of UTF-8's properties in a UTF-8 |
6754 | locale, but mbrlen changes the mbstate_t on every call even when | |
6755 | presented with single-byte characters. */ | |
7117c2d2 JA |
6756 | mbclen = mbrlen (shell_input_line + previ, i - previ + 1, &mbs); |
6757 | if (mbclen == 1 || mbclen == (size_t)-1) | |
6758 | { | |
6759 | mbclen = 1; | |
6760 | previ = i + 1; | |
6761 | } | |
6762 | else if (mbclen == (size_t)-2) | |
6763 | mbclen = 0; | |
6764 | else if (mbclen > 1) | |
6765 | { | |
6766 | mbclen = 0; | |
6767 | previ = i + 1; | |
6768 | prevs = mbs; | |
6769 | } | |
6770 | else | |
6771 | { | |
b80f6443 | 6772 | /* XXX - what to do if mbrlen returns 0? (null wide character) */ |
ac50fbac | 6773 | size_t j; |
b80f6443 JA |
6774 | for (j = i; j < len; j++) |
6775 | shell_input_line_property[j] = 1; | |
6776 | break; | |
7117c2d2 JA |
6777 | } |
6778 | ||
6779 | shell_input_line_property[i] = mbclen; | |
6780 | } | |
6781 | } | |
6782 | #endif /* HANDLE_MULTIBYTE */ |