]>
Commit | Line | Data |
---|---|---|
726f6388 JA |
1 | /* Yacc grammar for bash. */ |
2 | ||
3 | /* Copyright (C) 1989 Free Software Foundation, Inc. | |
4 | ||
5 | This file is part of GNU Bash, the Bourne Again SHell. | |
6 | ||
7 | Bash is free software; you can redistribute it and/or modify it under | |
8 | the terms of the GNU General Public License as published by the Free | |
bb70624e | 9 | Software Foundation; either version 2, or (at your option) any later |
726f6388 JA |
10 | version. |
11 | ||
12 | Bash is distributed in the hope that it will be useful, but WITHOUT ANY | |
13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 | for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License along | |
18 | with Bash; see the file LICENSE. If not, write to the Free Software | |
bb70624e | 19 | Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */ |
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> | |
38 | #include <signal.h> | |
39 | ||
40 | #include "memalloc.h" | |
41 | ||
726f6388 | 42 | #include "shell.h" |
ccc6cda3 | 43 | #include "trap.h" |
726f6388 | 44 | #include "flags.h" |
ccc6cda3 JA |
45 | #include "parser.h" |
46 | #include "mailcheck.h" | |
47 | #include "builtins/common.h" | |
48 | #include "builtins/builtext.h" | |
726f6388 JA |
49 | |
50 | #if defined (READLINE) | |
ccc6cda3 | 51 | # include "bashline.h" |
726f6388 JA |
52 | # include <readline/readline.h> |
53 | #endif /* READLINE */ | |
54 | ||
55 | #if defined (HISTORY) | |
56 | # include "bashhist.h" | |
57 | # include <readline/history.h> | |
58 | #endif /* HISTORY */ | |
59 | ||
60 | #if defined (JOB_CONTROL) | |
61 | # include "jobs.h" | |
62 | #endif /* JOB_CONTROL */ | |
63 | ||
64 | #if defined (ALIAS) | |
65 | # include "alias.h" | |
66 | #endif /* ALIAS */ | |
67 | ||
68 | #if defined (PROMPT_STRING_DECODE) | |
cce855bc JA |
69 | # ifndef _MINIX |
70 | # include <sys/param.h> | |
71 | # endif | |
72 | # include <time.h> | |
73 | # include "maxpath.h" | |
726f6388 JA |
74 | #endif /* PROMPT_STRING_DECODE */ |
75 | ||
ccc6cda3 JA |
76 | #define RE_READ_TOKEN -99 |
77 | #define NO_EXPANSION -100 | |
78 | ||
79 | #define YYDEBUG 0 | |
80 | ||
cce855bc | 81 | #if defined (EXTENDED_GLOB) |
cce855bc JA |
82 | extern int extended_glob; |
83 | #endif | |
84 | ||
726f6388 | 85 | extern int eof_encountered; |
ccc6cda3 | 86 | extern int no_line_editing, running_under_emacs; |
726f6388 JA |
87 | extern int current_command_number; |
88 | extern int interactive, interactive_shell, login_shell; | |
ccc6cda3 | 89 | extern int sourcelevel; |
726f6388 JA |
90 | extern int posixly_correct; |
91 | extern int last_command_exit_value; | |
92 | extern int interrupt_immediately; | |
93 | extern char *shell_name, *current_host_name; | |
ccc6cda3 JA |
94 | extern char *dist_version; |
95 | extern int patch_level; | |
cce855bc | 96 | extern int dump_translatable_strings, dump_po_strings; |
726f6388 | 97 | extern Function *last_shell_builtin, *this_shell_builtin; |
726f6388 JA |
98 | #if defined (BUFFERED_INPUT) |
99 | extern int bash_input_fd_changed; | |
100 | #endif | |
101 | ||
bb70624e | 102 | extern int errno; |
726f6388 JA |
103 | /* **************************************************************** */ |
104 | /* */ | |
105 | /* "Forward" declarations */ | |
106 | /* */ | |
107 | /* **************************************************************** */ | |
108 | ||
ccc6cda3 JA |
109 | static char *ansiexpand (); |
110 | static char *localeexpand (); | |
726f6388 JA |
111 | static int reserved_word_acceptable (); |
112 | static int read_token (); | |
ccc6cda3 | 113 | static int yylex (); |
d166f048 | 114 | static int parse_arith_cmd (); |
cce855bc JA |
115 | #if defined (COND_COMMAND) |
116 | static COMMAND *parse_cond_command (); | |
117 | #endif | |
ccc6cda3 JA |
118 | static int read_token_word (); |
119 | static void discard_parser_constructs (); | |
726f6388 JA |
120 | |
121 | static void report_syntax_error (); | |
122 | static void handle_eof_input_unit (); | |
123 | static void prompt_again (); | |
d166f048 | 124 | #if 0 |
726f6388 | 125 | static void reset_readline_prompt (); |
d166f048 | 126 | #endif |
726f6388 JA |
127 | static void print_prompt (); |
128 | ||
28ef6c31 JA |
129 | #if defined (HISTORY) |
130 | char *history_delimiting_chars (); | |
131 | #endif | |
132 | ||
d166f048 JA |
133 | extern int yyerror (); |
134 | ||
ccc6cda3 JA |
135 | /* Default prompt strings */ |
136 | char *primary_prompt = PPROMPT; | |
137 | char *secondary_prompt = SPROMPT; | |
138 | ||
726f6388 JA |
139 | /* PROMPT_STRING_POINTER points to one of these, never to an actual string. */ |
140 | char *ps1_prompt, *ps2_prompt; | |
141 | ||
142 | /* Handle on the current prompt string. Indirectly points through | |
143 | ps1_ or ps2_prompt. */ | |
144 | char **prompt_string_pointer = (char **)NULL; | |
145 | char *current_prompt_string; | |
146 | ||
ccc6cda3 JA |
147 | /* Non-zero means we expand aliases in commands. */ |
148 | int expand_aliases = 0; | |
149 | ||
150 | /* If non-zero, the decoded prompt string undergoes parameter and | |
151 | variable substitution, command substitution, arithmetic substitution, | |
152 | string expansion, process substitution, and quote removal in | |
153 | decode_prompt_string. */ | |
154 | int promptvars = 1; | |
155 | ||
726f6388 JA |
156 | /* The decoded prompt string. Used if READLINE is not defined or if |
157 | editing is turned off. Analogous to current_readline_prompt. */ | |
158 | static char *current_decoded_prompt; | |
159 | ||
160 | /* The number of lines read from input while creating the current command. */ | |
ccc6cda3 | 161 | int current_command_line_count; |
726f6388 JA |
162 | |
163 | /* Variables to manage the task of reading here documents, because we need to | |
164 | defer the reading until after a complete command has been collected. */ | |
165 | static REDIRECT *redir_stack[10]; | |
ccc6cda3 | 166 | int need_here_doc; |
726f6388 JA |
167 | |
168 | /* Where shell input comes from. History expansion is performed on each | |
169 | line when the shell is interactive. */ | |
170 | static char *shell_input_line = (char *)NULL; | |
ccc6cda3 JA |
171 | static int shell_input_line_index; |
172 | static int shell_input_line_size; /* Amount allocated for shell_input_line. */ | |
173 | static int shell_input_line_len; /* strlen (shell_input_line) */ | |
726f6388 JA |
174 | |
175 | /* Either zero or EOF. */ | |
ccc6cda3 JA |
176 | static int shell_input_line_terminator; |
177 | ||
178 | /* The line number in a script on which a function definition starts. */ | |
179 | static int function_dstart; | |
180 | ||
181 | /* The line number in a script on which a function body starts. */ | |
182 | static int function_bstart; | |
726f6388 | 183 | |
bb70624e JA |
184 | /* The line number in a script at which an arithmetic for command starts. */ |
185 | static int arith_for_lineno; | |
186 | ||
726f6388 JA |
187 | static REDIRECTEE redir; |
188 | %} | |
189 | ||
190 | %union { | |
191 | WORD_DESC *word; /* the word that we read. */ | |
192 | int number; /* the number that we read. */ | |
193 | WORD_LIST *word_list; | |
194 | COMMAND *command; | |
195 | REDIRECT *redirect; | |
196 | ELEMENT element; | |
197 | PATTERN_LIST *pattern; | |
198 | } | |
199 | ||
200 | /* Reserved words. Members of the first group are only recognized | |
201 | in the case that they are preceded by a list_terminator. Members | |
cce855bc JA |
202 | of the second group are for [[...]] commands. Members of the |
203 | third group are recognized only under special circumstances. */ | |
726f6388 | 204 | %token IF THEN ELSE ELIF FI CASE ESAC FOR SELECT WHILE UNTIL DO DONE FUNCTION |
cce855bc | 205 | %token COND_START COND_END COND_ERROR |
bb70624e | 206 | %token IN BANG TIME TIMEOPT |
726f6388 JA |
207 | |
208 | /* More general tokens. yylex () knows how to make these. */ | |
209 | %token <word> WORD ASSIGNMENT_WORD | |
210 | %token <number> NUMBER | |
bb70624e | 211 | %token <word_list> ARITH_CMD ARITH_FOR_EXPRS |
cce855bc | 212 | %token <command> COND_CMD |
726f6388 JA |
213 | %token AND_AND OR_OR GREATER_GREATER LESS_LESS LESS_AND |
214 | %token GREATER_AND SEMI_SEMI LESS_LESS_MINUS AND_GREATER LESS_GREATER | |
215 | %token GREATER_BAR | |
216 | ||
217 | /* The types that the various syntactical units return. */ | |
218 | ||
ccc6cda3 JA |
219 | %type <command> inputunit command pipeline pipeline_command |
220 | %type <command> list list0 list1 compound_list simple_list simple_list1 | |
221 | %type <command> simple_command shell_command | |
222 | %type <command> for_command select_command case_command group_command | |
cce855bc JA |
223 | %type <command> arith_command |
224 | %type <command> cond_command | |
bb70624e | 225 | %type <command> arith_for_command |
28ef6c31 | 226 | %type <command> function_def function_body if_command elif_clause subshell |
ccc6cda3 | 227 | %type <redirect> redirection redirection_list |
726f6388 | 228 | %type <element> simple_command_element |
ccc6cda3 JA |
229 | %type <word_list> word_list pattern |
230 | %type <pattern> pattern_list case_clause_sequence case_clause | |
231 | %type <number> timespec | |
726f6388 JA |
232 | |
233 | %start inputunit | |
234 | ||
235 | %left '&' ';' '\n' yacc_EOF | |
236 | %left AND_AND OR_OR | |
237 | %right '|' | |
238 | %% | |
239 | ||
240 | inputunit: simple_list '\n' | |
241 | { | |
242 | /* Case of regular command. Discard the error | |
243 | safety net,and return the command just parsed. */ | |
244 | global_command = $1; | |
245 | eof_encountered = 0; | |
246 | discard_parser_constructs (0); | |
247 | YYACCEPT; | |
248 | } | |
249 | | '\n' | |
250 | { | |
251 | /* Case of regular command, but not a very | |
252 | interesting one. Return a NULL command. */ | |
253 | global_command = (COMMAND *)NULL; | |
254 | YYACCEPT; | |
255 | } | |
ccc6cda3 | 256 | | error '\n' |
726f6388 JA |
257 | { |
258 | /* Error during parsing. Return NULL command. */ | |
259 | global_command = (COMMAND *)NULL; | |
260 | eof_encountered = 0; | |
261 | discard_parser_constructs (1); | |
262 | if (interactive) | |
263 | { | |
264 | YYACCEPT; | |
265 | } | |
266 | else | |
267 | { | |
268 | YYABORT; | |
269 | } | |
270 | } | |
271 | | yacc_EOF | |
272 | { | |
ccc6cda3 | 273 | /* Case of EOF seen by itself. Do ignoreeof or |
726f6388 JA |
274 | not. */ |
275 | global_command = (COMMAND *)NULL; | |
276 | handle_eof_input_unit (); | |
277 | YYACCEPT; | |
278 | } | |
279 | ; | |
280 | ||
ccc6cda3 JA |
281 | word_list: WORD |
282 | { $$ = make_word_list ($1, (WORD_LIST *)NULL); } | |
283 | | word_list WORD | |
726f6388 JA |
284 | { $$ = make_word_list ($2, $1); } |
285 | ; | |
286 | ||
287 | redirection: '>' WORD | |
288 | { | |
289 | redir.filename = $2; | |
290 | $$ = make_redirection (1, r_output_direction, redir); | |
291 | } | |
292 | | '<' WORD | |
293 | { | |
294 | redir.filename = $2; | |
295 | $$ = make_redirection (0, r_input_direction, redir); | |
296 | } | |
297 | | NUMBER '>' WORD | |
298 | { | |
299 | redir.filename = $3; | |
300 | $$ = make_redirection ($1, r_output_direction, redir); | |
301 | } | |
302 | | NUMBER '<' WORD | |
303 | { | |
304 | redir.filename = $3; | |
305 | $$ = make_redirection ($1, r_input_direction, redir); | |
306 | } | |
307 | | GREATER_GREATER WORD | |
308 | { | |
309 | redir.filename = $2; | |
310 | $$ = make_redirection (1, r_appending_to, redir); | |
311 | } | |
312 | | NUMBER GREATER_GREATER WORD | |
313 | { | |
314 | redir.filename = $3; | |
315 | $$ = make_redirection ($1, r_appending_to, redir); | |
316 | } | |
317 | | LESS_LESS WORD | |
318 | { | |
319 | redir.filename = $2; | |
320 | $$ = make_redirection (0, r_reading_until, redir); | |
321 | redir_stack[need_here_doc++] = $$; | |
322 | } | |
323 | | NUMBER LESS_LESS WORD | |
324 | { | |
325 | redir.filename = $3; | |
326 | $$ = make_redirection ($1, r_reading_until, redir); | |
327 | redir_stack[need_here_doc++] = $$; | |
328 | } | |
329 | | LESS_AND NUMBER | |
330 | { | |
331 | redir.dest = $2; | |
332 | $$ = make_redirection (0, r_duplicating_input, redir); | |
333 | } | |
334 | | NUMBER LESS_AND NUMBER | |
335 | { | |
336 | redir.dest = $3; | |
337 | $$ = make_redirection ($1, r_duplicating_input, redir); | |
338 | } | |
339 | | GREATER_AND NUMBER | |
340 | { | |
341 | redir.dest = $2; | |
342 | $$ = make_redirection (1, r_duplicating_output, redir); | |
343 | } | |
344 | | NUMBER GREATER_AND NUMBER | |
345 | { | |
346 | redir.dest = $3; | |
347 | $$ = make_redirection ($1, r_duplicating_output, redir); | |
348 | } | |
349 | | LESS_AND WORD | |
350 | { | |
351 | redir.filename = $2; | |
352 | $$ = make_redirection (0, r_duplicating_input_word, redir); | |
353 | } | |
354 | | NUMBER LESS_AND WORD | |
355 | { | |
356 | redir.filename = $3; | |
357 | $$ = make_redirection ($1, r_duplicating_input_word, redir); | |
358 | } | |
359 | | GREATER_AND WORD | |
360 | { | |
361 | redir.filename = $2; | |
362 | $$ = make_redirection (1, r_duplicating_output_word, redir); | |
363 | } | |
364 | | NUMBER GREATER_AND WORD | |
365 | { | |
366 | redir.filename = $3; | |
367 | $$ = make_redirection ($1, r_duplicating_output_word, redir); | |
368 | } | |
369 | | LESS_LESS_MINUS WORD | |
370 | { | |
371 | redir.filename = $2; | |
372 | $$ = make_redirection | |
373 | (0, r_deblank_reading_until, redir); | |
374 | redir_stack[need_here_doc++] = $$; | |
375 | } | |
376 | | NUMBER LESS_LESS_MINUS WORD | |
377 | { | |
378 | redir.filename = $3; | |
379 | $$ = make_redirection | |
380 | ($1, r_deblank_reading_until, redir); | |
381 | redir_stack[need_here_doc++] = $$; | |
382 | } | |
383 | | GREATER_AND '-' | |
384 | { | |
385 | redir.dest = 0L; | |
386 | $$ = make_redirection (1, r_close_this, redir); | |
387 | } | |
388 | | NUMBER GREATER_AND '-' | |
389 | { | |
390 | redir.dest = 0L; | |
391 | $$ = make_redirection ($1, r_close_this, redir); | |
392 | } | |
393 | | LESS_AND '-' | |
394 | { | |
395 | redir.dest = 0L; | |
396 | $$ = make_redirection (0, r_close_this, redir); | |
397 | } | |
398 | | NUMBER LESS_AND '-' | |
399 | { | |
400 | redir.dest = 0L; | |
401 | $$ = make_redirection ($1, r_close_this, redir); | |
402 | } | |
403 | | AND_GREATER WORD | |
404 | { | |
405 | redir.filename = $2; | |
406 | $$ = make_redirection (1, r_err_and_out, redir); | |
407 | } | |
408 | | NUMBER LESS_GREATER WORD | |
409 | { | |
410 | redir.filename = $3; | |
411 | $$ = make_redirection ($1, r_input_output, redir); | |
412 | } | |
413 | | LESS_GREATER WORD | |
414 | { | |
726f6388 | 415 | redir.filename = $2; |
ccc6cda3 JA |
416 | $$ = make_redirection (0, r_input_output, redir); |
417 | } | |
726f6388 JA |
418 | | GREATER_BAR WORD |
419 | { | |
420 | redir.filename = $2; | |
421 | $$ = make_redirection (1, r_output_force, redir); | |
422 | } | |
423 | | NUMBER GREATER_BAR WORD | |
424 | { | |
425 | redir.filename = $3; | |
426 | $$ = make_redirection ($1, r_output_force, redir); | |
427 | } | |
428 | ; | |
429 | ||
430 | simple_command_element: WORD | |
431 | { $$.word = $1; $$.redirect = 0; } | |
432 | | ASSIGNMENT_WORD | |
433 | { $$.word = $1; $$.redirect = 0; } | |
434 | | redirection | |
435 | { $$.redirect = $1; $$.word = 0; } | |
436 | ; | |
437 | ||
ccc6cda3 | 438 | redirection_list: redirection |
726f6388 JA |
439 | { |
440 | $$ = $1; | |
441 | } | |
ccc6cda3 JA |
442 | | redirection_list redirection |
443 | { | |
444 | register REDIRECT *t; | |
726f6388 | 445 | |
ccc6cda3 JA |
446 | for (t = $1; t->next; t = t->next) |
447 | ; | |
448 | t->next = $2; | |
726f6388 JA |
449 | $$ = $1; |
450 | } | |
451 | ; | |
452 | ||
453 | simple_command: simple_command_element | |
454 | { $$ = make_simple_command ($1, (COMMAND *)NULL); } | |
455 | | simple_command simple_command_element | |
456 | { $$ = make_simple_command ($2, $1); } | |
457 | ; | |
458 | ||
459 | command: simple_command | |
460 | { $$ = clean_simple_command ($1); } | |
461 | | shell_command | |
462 | { $$ = $1; } | |
ccc6cda3 | 463 | | shell_command redirection_list |
726f6388 | 464 | { |
ccc6cda3 JA |
465 | COMMAND *tc; |
466 | ||
467 | tc = $1; | |
ccc6cda3 | 468 | if (tc->redirects) |
726f6388 JA |
469 | { |
470 | register REDIRECT *t; | |
ccc6cda3 | 471 | for (t = tc->redirects; t->next; t = t->next) |
726f6388 JA |
472 | ; |
473 | t->next = $2; | |
474 | } | |
475 | else | |
ccc6cda3 | 476 | tc->redirects = $2; |
726f6388 JA |
477 | $$ = $1; |
478 | } | |
28ef6c31 JA |
479 | | function_def |
480 | { $$ = $1; } | |
726f6388 JA |
481 | ; |
482 | ||
ccc6cda3 JA |
483 | shell_command: for_command |
484 | { $$ = $1; } | |
485 | | case_command | |
486 | { $$ = $1; } | |
487 | | WHILE compound_list DO compound_list DONE | |
726f6388 | 488 | { $$ = make_while_command ($2, $4); } |
ccc6cda3 | 489 | | UNTIL compound_list DO compound_list DONE |
726f6388 JA |
490 | { $$ = make_until_command ($2, $4); } |
491 | | select_command | |
492 | { $$ = $1; } | |
493 | | if_command | |
494 | { $$ = $1; } | |
495 | | subshell | |
496 | { $$ = $1; } | |
497 | | group_command | |
498 | { $$ = $1; } | |
cce855bc JA |
499 | | arith_command |
500 | { $$ = $1; } | |
501 | | cond_command | |
502 | { $$ = $1; } | |
bb70624e JA |
503 | | arith_for_command |
504 | { $$ = $1; } | |
726f6388 JA |
505 | ; |
506 | ||
d166f048 | 507 | for_command: FOR WORD newline_list DO compound_list DONE |
ccc6cda3 | 508 | { $$ = make_for_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $5); } |
d166f048 | 509 | | FOR WORD newline_list '{' compound_list '}' |
ccc6cda3 | 510 | { $$ = make_for_command ($2, add_string_to_list ("$@", (WORD_LIST *)NULL), $5); } |
d166f048 | 511 | | FOR WORD ';' newline_list DO compound_list DONE |
ccc6cda3 | 512 | { $$ = make_for_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $6); } |
d166f048 | 513 | | FOR WORD ';' newline_list '{' compound_list '}' |
ccc6cda3 | 514 | { $$ = make_for_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $6); } |
d166f048 | 515 | | FOR WORD newline_list IN word_list list_terminator newline_list DO compound_list DONE |
ccc6cda3 | 516 | { $$ = make_for_command ($2, REVERSE_LIST ($5, WORD_LIST *), $9); } |
d166f048 | 517 | | FOR WORD newline_list IN word_list list_terminator newline_list '{' compound_list '}' |
ccc6cda3 JA |
518 | { $$ = make_for_command ($2, REVERSE_LIST ($5, WORD_LIST *), $9); } |
519 | ; | |
520 | ||
bb70624e JA |
521 | arith_for_command: FOR ARITH_FOR_EXPRS list_terminator newline_list DO compound_list DONE |
522 | { $$ = make_arith_for_command ($2, $6, arith_for_lineno); } | |
523 | | FOR ARITH_FOR_EXPRS list_terminator newline_list '{' compound_list '}' | |
524 | { $$ = make_arith_for_command ($2, $6, arith_for_lineno); } | |
28ef6c31 JA |
525 | | FOR ARITH_FOR_EXPRS DO compound_list DONE |
526 | { $$ = make_arith_for_command ($2, $4, arith_for_lineno); } | |
527 | | FOR ARITH_FOR_EXPRS '{' compound_list '}' | |
528 | { $$ = make_arith_for_command ($2, $4, arith_for_lineno); } | |
bb70624e | 529 | ; |
28ef6c31 | 530 | |
ccc6cda3 | 531 | select_command: SELECT WORD newline_list DO list DONE |
726f6388 | 532 | { |
726f6388 | 533 | $$ = make_select_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $5); |
726f6388 | 534 | } |
ccc6cda3 | 535 | | SELECT WORD newline_list '{' list '}' |
726f6388 | 536 | { |
726f6388 | 537 | $$ = make_select_command ($2, add_string_to_list ("$@", (WORD_LIST *)NULL), $5); |
726f6388 | 538 | } |
ccc6cda3 | 539 | | SELECT WORD ';' newline_list DO list DONE |
726f6388 | 540 | { |
726f6388 | 541 | $$ = make_select_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $6); |
726f6388 | 542 | } |
ccc6cda3 | 543 | | SELECT WORD ';' newline_list '{' list '}' |
726f6388 | 544 | { |
726f6388 | 545 | $$ = make_select_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $6); |
726f6388 | 546 | } |
ccc6cda3 | 547 | | SELECT WORD newline_list IN word_list list_terminator newline_list DO list DONE |
726f6388 | 548 | { |
726f6388 | 549 | $$ = make_select_command ($2, (WORD_LIST *)reverse_list ($5), $9); |
726f6388 | 550 | } |
ccc6cda3 | 551 | | SELECT WORD newline_list IN word_list list_terminator newline_list '{' list '}' |
726f6388 | 552 | { |
726f6388 | 553 | $$ = make_select_command ($2, (WORD_LIST *)reverse_list ($5), $9); |
726f6388 JA |
554 | } |
555 | ; | |
556 | ||
ccc6cda3 JA |
557 | case_command: CASE WORD newline_list IN newline_list ESAC |
558 | { $$ = make_case_command ($2, (PATTERN_LIST *)NULL); } | |
559 | | CASE WORD newline_list IN case_clause_sequence newline_list ESAC | |
560 | { $$ = make_case_command ($2, $5); } | |
561 | | CASE WORD newline_list IN case_clause ESAC | |
562 | { $$ = make_case_command ($2, $5); } | |
563 | ; | |
726f6388 | 564 | |
28ef6c31 | 565 | function_def: WORD '(' ')' newline_list function_body |
ccc6cda3 | 566 | { $$ = make_function_def ($1, $5, function_dstart, function_bstart); } |
726f6388 | 567 | |
28ef6c31 | 568 | | FUNCTION WORD '(' ')' newline_list function_body |
ccc6cda3 | 569 | { $$ = make_function_def ($2, $6, function_dstart, function_bstart); } |
726f6388 | 570 | |
28ef6c31 | 571 | | FUNCTION WORD newline_list function_body |
ccc6cda3 | 572 | { $$ = make_function_def ($2, $4, function_dstart, function_bstart); } |
726f6388 JA |
573 | ; |
574 | ||
28ef6c31 JA |
575 | |
576 | function_body: shell_command | |
577 | { $$ = $1; } | |
578 | | shell_command redirection_list | |
579 | { | |
580 | COMMAND *tc; | |
581 | ||
582 | tc = $1; | |
583 | /* According to Posix.2 3.9.5, redirections | |
584 | specified after the body of a function should | |
585 | be attached to the function and performed when | |
586 | the function is executed, not as part of the | |
587 | function definition command. */ | |
588 | /* XXX - I don't think it matters, but we might | |
589 | want to change this in the future to avoid | |
590 | problems differentiating between a function | |
591 | definition with a redirection and a function | |
592 | definition containing a single command with a | |
593 | redirection. The two are semantically equivalent, | |
594 | though -- the only difference is in how the | |
595 | command printing code displays the redirections. */ | |
596 | if (tc->redirects) | |
597 | { | |
598 | register REDIRECT *t; | |
599 | for (t = tc->redirects; t->next; t = t->next) | |
600 | ; | |
601 | t->next = $2; | |
602 | } | |
603 | else | |
604 | tc->redirects = $2; | |
605 | $$ = $1; | |
606 | } | |
607 | ; | |
608 | ||
ccc6cda3 | 609 | subshell: '(' compound_list ')' |
bb70624e JA |
610 | { |
611 | $$ = make_subshell_command ($2); | |
612 | $$->flags |= CMD_WANT_SUBSHELL; | |
613 | } | |
726f6388 | 614 | ; |
ccc6cda3 JA |
615 | |
616 | if_command: IF compound_list THEN compound_list FI | |
726f6388 | 617 | { $$ = make_if_command ($2, $4, (COMMAND *)NULL); } |
ccc6cda3 | 618 | | IF compound_list THEN compound_list ELSE compound_list FI |
726f6388 | 619 | { $$ = make_if_command ($2, $4, $6); } |
ccc6cda3 | 620 | | IF compound_list THEN compound_list elif_clause FI |
726f6388 JA |
621 | { $$ = make_if_command ($2, $4, $5); } |
622 | ; | |
623 | ||
624 | ||
28ef6c31 | 625 | group_command: '{' compound_list '}' |
726f6388 JA |
626 | { $$ = make_group_command ($2); } |
627 | ; | |
628 | ||
cce855bc JA |
629 | arith_command: ARITH_CMD |
630 | { $$ = make_arith_command ($1); } | |
631 | ; | |
632 | ||
633 | cond_command: COND_START COND_CMD COND_END | |
634 | { $$ = $2; } | |
635 | ; | |
636 | ||
ccc6cda3 | 637 | elif_clause: ELIF compound_list THEN compound_list |
726f6388 | 638 | { $$ = make_if_command ($2, $4, (COMMAND *)NULL); } |
ccc6cda3 | 639 | | ELIF compound_list THEN compound_list ELSE compound_list |
726f6388 | 640 | { $$ = make_if_command ($2, $4, $6); } |
ccc6cda3 | 641 | | ELIF compound_list THEN compound_list elif_clause |
726f6388 JA |
642 | { $$ = make_if_command ($2, $4, $5); } |
643 | ; | |
644 | ||
ccc6cda3 JA |
645 | case_clause: pattern_list |
646 | | case_clause_sequence pattern_list | |
726f6388 JA |
647 | { $2->next = $1; $$ = $2; } |
648 | ; | |
649 | ||
ccc6cda3 | 650 | pattern_list: newline_list pattern ')' compound_list |
726f6388 | 651 | { $$ = make_pattern_list ($2, $4); } |
ccc6cda3 | 652 | | newline_list pattern ')' newline_list |
726f6388 | 653 | { $$ = make_pattern_list ($2, (COMMAND *)NULL); } |
ccc6cda3 | 654 | | newline_list '(' pattern ')' compound_list |
726f6388 | 655 | { $$ = make_pattern_list ($3, $5); } |
ccc6cda3 | 656 | | newline_list '(' pattern ')' newline_list |
726f6388 JA |
657 | { $$ = make_pattern_list ($3, (COMMAND *)NULL); } |
658 | ; | |
659 | ||
ccc6cda3 JA |
660 | case_clause_sequence: pattern_list SEMI_SEMI |
661 | | case_clause_sequence pattern_list SEMI_SEMI | |
726f6388 JA |
662 | { $2->next = $1; $$ = $2; } |
663 | ; | |
664 | ||
726f6388 JA |
665 | pattern: WORD |
666 | { $$ = make_word_list ($1, (WORD_LIST *)NULL); } | |
667 | | pattern '|' WORD | |
668 | { $$ = make_word_list ($3, $1); } | |
669 | ; | |
670 | ||
671 | /* A list allows leading or trailing newlines and | |
672 | newlines as operators (equivalent to semicolons). | |
673 | It must end with a newline or semicolon. | |
674 | Lists are used within commands such as if, for, while. */ | |
675 | ||
ccc6cda3 | 676 | list: newline_list list0 |
726f6388 JA |
677 | { |
678 | $$ = $2; | |
679 | if (need_here_doc) | |
680 | gather_here_documents (); | |
681 | } | |
682 | ; | |
683 | ||
ccc6cda3 JA |
684 | compound_list: list |
685 | | newline_list list1 | |
686 | { | |
687 | $$ = $2; | |
688 | } | |
689 | ; | |
690 | ||
691 | list0: list1 '\n' newline_list | |
692 | | list1 '&' newline_list | |
726f6388 JA |
693 | { |
694 | if ($1->type == cm_connection) | |
695 | $$ = connect_async_list ($1, (COMMAND *)NULL, '&'); | |
696 | else | |
697 | $$ = command_connect ($1, (COMMAND *)NULL, '&'); | |
698 | } | |
ccc6cda3 | 699 | | list1 ';' newline_list |
726f6388 JA |
700 | |
701 | ; | |
702 | ||
ccc6cda3 | 703 | list1: list1 AND_AND newline_list list1 |
726f6388 | 704 | { $$ = command_connect ($1, $4, AND_AND); } |
ccc6cda3 | 705 | | list1 OR_OR newline_list list1 |
726f6388 | 706 | { $$ = command_connect ($1, $4, OR_OR); } |
ccc6cda3 | 707 | | list1 '&' newline_list list1 |
726f6388 JA |
708 | { |
709 | if ($1->type == cm_connection) | |
710 | $$ = connect_async_list ($1, $4, '&'); | |
711 | else | |
712 | $$ = command_connect ($1, $4, '&'); | |
713 | } | |
ccc6cda3 | 714 | | list1 ';' newline_list list1 |
726f6388 | 715 | { $$ = command_connect ($1, $4, ';'); } |
ccc6cda3 | 716 | | list1 '\n' newline_list list1 |
726f6388 | 717 | { $$ = command_connect ($1, $4, ';'); } |
ccc6cda3 | 718 | | pipeline_command |
726f6388 | 719 | { $$ = $1; } |
726f6388 JA |
720 | ; |
721 | ||
722 | list_terminator:'\n' | |
723 | | ';' | |
724 | | yacc_EOF | |
725 | ; | |
726 | ||
ccc6cda3 JA |
727 | newline_list: |
728 | | newline_list '\n' | |
726f6388 JA |
729 | ; |
730 | ||
731 | /* A simple_list is a list that contains no significant newlines | |
732 | and no leading or trailing newlines. Newlines are allowed | |
733 | only following operators, where they are not significant. | |
734 | ||
735 | This is what an inputunit consists of. */ | |
736 | ||
737 | simple_list: simple_list1 | |
738 | { | |
739 | $$ = $1; | |
740 | if (need_here_doc) | |
741 | gather_here_documents (); | |
742 | } | |
743 | | simple_list1 '&' | |
744 | { | |
745 | if ($1->type == cm_connection) | |
746 | $$ = connect_async_list ($1, (COMMAND *)NULL, '&'); | |
747 | else | |
748 | $$ = command_connect ($1, (COMMAND *)NULL, '&'); | |
749 | if (need_here_doc) | |
750 | gather_here_documents (); | |
751 | } | |
752 | | simple_list1 ';' | |
753 | { | |
754 | $$ = $1; | |
755 | if (need_here_doc) | |
756 | gather_here_documents (); | |
757 | } | |
758 | ; | |
759 | ||
ccc6cda3 | 760 | simple_list1: simple_list1 AND_AND newline_list simple_list1 |
726f6388 | 761 | { $$ = command_connect ($1, $4, AND_AND); } |
ccc6cda3 | 762 | | simple_list1 OR_OR newline_list simple_list1 |
726f6388 JA |
763 | { $$ = command_connect ($1, $4, OR_OR); } |
764 | | simple_list1 '&' simple_list1 | |
765 | { | |
766 | if ($1->type == cm_connection) | |
767 | $$ = connect_async_list ($1, $3, '&'); | |
768 | else | |
769 | $$ = command_connect ($1, $3, '&'); | |
770 | } | |
771 | | simple_list1 ';' simple_list1 | |
772 | { $$ = command_connect ($1, $3, ';'); } | |
ccc6cda3 JA |
773 | |
774 | | pipeline_command | |
775 | { $$ = $1; } | |
776 | ; | |
777 | ||
778 | pipeline_command: pipeline | |
726f6388 JA |
779 | { $$ = $1; } |
780 | | BANG pipeline | |
781 | { | |
782 | $2->flags |= CMD_INVERT_RETURN; | |
783 | $$ = $2; | |
784 | } | |
ccc6cda3 JA |
785 | | timespec pipeline |
786 | { | |
787 | $2->flags |= $1; | |
788 | $$ = $2; | |
789 | } | |
790 | | timespec BANG pipeline | |
791 | { | |
bb70624e | 792 | $3->flags |= $1|CMD_INVERT_RETURN; |
ccc6cda3 JA |
793 | $$ = $3; |
794 | } | |
795 | | BANG timespec pipeline | |
796 | { | |
797 | $3->flags |= $2|CMD_INVERT_RETURN; | |
798 | $$ = $3; | |
799 | } | |
726f6388 JA |
800 | ; |
801 | ||
802 | pipeline: | |
ccc6cda3 | 803 | pipeline '|' newline_list pipeline |
726f6388 JA |
804 | { $$ = command_connect ($1, $4, '|'); } |
805 | | command | |
806 | { $$ = $1; } | |
807 | ; | |
ccc6cda3 JA |
808 | |
809 | timespec: TIME | |
810 | { $$ = CMD_TIME_PIPELINE; } | |
811 | | TIME TIMEOPT | |
812 | { $$ = CMD_TIME_PIPELINE|CMD_TIME_POSIX; } | |
813 | ; | |
726f6388 JA |
814 | %% |
815 | ||
ccc6cda3 JA |
816 | /* Possible states for the parser that require it to do special things. */ |
817 | #define PST_CASEPAT 0x001 /* in a case pattern list */ | |
818 | #define PST_ALEXPNEXT 0x002 /* expand next word for aliases */ | |
819 | #define PST_ALLOWOPNBRC 0x004 /* allow open brace for function def */ | |
820 | #define PST_NEEDCLOSBRC 0x008 /* need close brace */ | |
821 | #define PST_DBLPAREN 0x010 /* double-paren parsing */ | |
822 | #define PST_SUBSHELL 0x020 /* ( ... ) subshell */ | |
823 | #define PST_CMDSUBST 0x040 /* $( ... ) command substitution */ | |
824 | #define PST_CASESTMT 0x080 /* parsing a case statement */ | |
cce855bc JA |
825 | #define PST_CONDCMD 0x100 /* parsing a [[...]] command */ |
826 | #define PST_CONDEXPR 0x200 /* parsing the guts of [[...]] */ | |
bb70624e | 827 | #define PST_ARITHFOR 0x400 /* parsing an arithmetic for command */ |
ccc6cda3 | 828 | |
726f6388 JA |
829 | /* Initial size to allocate for tokens, and the |
830 | amount to grow them by. */ | |
d166f048 | 831 | #define TOKEN_DEFAULT_INITIAL_SIZE 496 |
726f6388 JA |
832 | #define TOKEN_DEFAULT_GROW_SIZE 512 |
833 | ||
834 | /* The token currently being read. */ | |
ccc6cda3 | 835 | static int current_token; |
726f6388 JA |
836 | |
837 | /* The last read token, or NULL. read_token () uses this for context | |
838 | checking. */ | |
ccc6cda3 | 839 | static int last_read_token; |
726f6388 JA |
840 | |
841 | /* The token read prior to last_read_token. */ | |
ccc6cda3 JA |
842 | static int token_before_that; |
843 | ||
844 | /* The token read prior to token_before_that. */ | |
845 | static int two_tokens_ago; | |
726f6388 JA |
846 | |
847 | /* If non-zero, it is the token that we want read_token to return | |
848 | regardless of what text is (or isn't) present to be read. This | |
ccc6cda3 JA |
849 | is reset by read_token. If token_to_read == WORD or |
850 | ASSIGNMENT_WORD, yylval.word should be set to word_desc_to_read. */ | |
851 | static int token_to_read; | |
852 | static WORD_DESC *word_desc_to_read; | |
853 | ||
854 | /* The current parser state. */ | |
855 | static int parser_state; | |
726f6388 JA |
856 | |
857 | /* Global var is non-zero when end of file has been reached. */ | |
858 | int EOF_Reached = 0; | |
859 | ||
ccc6cda3 JA |
860 | void |
861 | debug_parser (i) | |
862 | int i; | |
863 | { | |
864 | #if YYDEBUG != 0 | |
865 | yydebug = i; | |
866 | #endif | |
867 | } | |
868 | ||
726f6388 JA |
869 | /* yy_getc () returns the next available character from input or EOF. |
870 | yy_ungetc (c) makes `c' the next character to read. | |
871 | init_yy_io (get, unget, type, location) makes the function GET the | |
872 | installed function for getting the next character, makes UNGET the | |
873 | installed function for un-getting a character, sets the type of stream | |
874 | (either string or file) from TYPE, and makes LOCATION point to where | |
875 | the input is coming from. */ | |
876 | ||
877 | /* Unconditionally returns end-of-file. */ | |
ccc6cda3 | 878 | int |
726f6388 JA |
879 | return_EOF () |
880 | { | |
881 | return (EOF); | |
882 | } | |
883 | ||
884 | /* Variable containing the current get and unget functions. | |
885 | See ./input.h for a clearer description. */ | |
886 | BASH_INPUT bash_input; | |
887 | ||
ccc6cda3 JA |
888 | /* Set all of the fields in BASH_INPUT to NULL. Free bash_input.name if it |
889 | is non-null, avoiding a memory leak. */ | |
726f6388 JA |
890 | void |
891 | initialize_bash_input () | |
892 | { | |
ccc6cda3 JA |
893 | bash_input.type = st_none; |
894 | FREE (bash_input.name); | |
726f6388 JA |
895 | bash_input.name = (char *)NULL; |
896 | bash_input.location.file = (FILE *)NULL; | |
897 | bash_input.location.string = (char *)NULL; | |
898 | bash_input.getter = (Function *)NULL; | |
899 | bash_input.ungetter = (Function *)NULL; | |
900 | } | |
901 | ||
902 | /* Set the contents of the current bash input stream from | |
903 | GET, UNGET, TYPE, NAME, and LOCATION. */ | |
904 | void | |
905 | init_yy_io (get, unget, type, name, location) | |
906 | Function *get, *unget; | |
d166f048 | 907 | enum stream_type type; |
726f6388 JA |
908 | char *name; |
909 | INPUT_STREAM location; | |
910 | { | |
911 | bash_input.type = type; | |
912 | FREE (bash_input.name); | |
ccc6cda3 | 913 | bash_input.name = name ? savestring (name) : (char *)NULL; |
726f6388 | 914 | |
ccc6cda3 | 915 | /* XXX */ |
726f6388 JA |
916 | #if defined (CRAY) |
917 | memcpy((char *)&bash_input.location.string, (char *)&location.string, sizeof(location)); | |
918 | #else | |
919 | bash_input.location = location; | |
920 | #endif | |
921 | bash_input.getter = get; | |
922 | bash_input.ungetter = unget; | |
923 | } | |
924 | ||
925 | /* Call this to get the next character of input. */ | |
ccc6cda3 | 926 | int |
726f6388 JA |
927 | yy_getc () |
928 | { | |
929 | return (*(bash_input.getter)) (); | |
930 | } | |
931 | ||
932 | /* Call this to unget C. That is, to make C the next character | |
933 | to be read. */ | |
ccc6cda3 | 934 | int |
726f6388 JA |
935 | yy_ungetc (c) |
936 | int c; | |
937 | { | |
938 | return (*(bash_input.ungetter)) (c); | |
939 | } | |
940 | ||
941 | #if defined (BUFFERED_INPUT) | |
942 | int | |
943 | input_file_descriptor () | |
944 | { | |
945 | switch (bash_input.type) | |
946 | { | |
947 | case st_stream: | |
948 | return (fileno (bash_input.location.file)); | |
949 | case st_bstream: | |
950 | return (bash_input.location.buffered_fd); | |
ccc6cda3 | 951 | case st_stdin: |
726f6388 JA |
952 | default: |
953 | return (fileno (stdin)); | |
954 | } | |
955 | } | |
956 | #endif /* BUFFERED_INPUT */ | |
957 | ||
958 | /* **************************************************************** */ | |
959 | /* */ | |
960 | /* Let input be read from readline (). */ | |
961 | /* */ | |
962 | /* **************************************************************** */ | |
963 | ||
964 | #if defined (READLINE) | |
965 | char *current_readline_prompt = (char *)NULL; | |
966 | char *current_readline_line = (char *)NULL; | |
967 | int current_readline_line_index = 0; | |
968 | ||
969 | static int | |
970 | yy_readline_get () | |
971 | { | |
ccc6cda3 JA |
972 | SigHandler *old_sigint; |
973 | int line_len, c; | |
974 | ||
726f6388 JA |
975 | if (!current_readline_line) |
976 | { | |
726f6388 JA |
977 | if (!bash_readline_initialized) |
978 | initialize_readline (); | |
979 | ||
980 | #if defined (JOB_CONTROL) | |
981 | if (job_control) | |
28ef6c31 | 982 | give_terminal_to (shell_pgrp, 0); |
726f6388 JA |
983 | #endif /* JOB_CONTROL */ |
984 | ||
985 | if (signal_is_ignored (SIGINT) == 0) | |
986 | { | |
987 | old_sigint = (SigHandler *)set_signal_handler (SIGINT, sigint_sighandler); | |
988 | interrupt_immediately++; | |
989 | } | |
990 | ||
ccc6cda3 JA |
991 | current_readline_line = readline (current_readline_prompt ? |
992 | current_readline_prompt : ""); | |
726f6388 JA |
993 | |
994 | if (signal_is_ignored (SIGINT) == 0) | |
995 | { | |
996 | interrupt_immediately--; | |
997 | set_signal_handler (SIGINT, old_sigint); | |
998 | } | |
999 | ||
ccc6cda3 JA |
1000 | #if 0 |
1001 | /* Reset the prompt to the decoded value of prompt_string_pointer. */ | |
726f6388 | 1002 | reset_readline_prompt (); |
ccc6cda3 | 1003 | #endif |
726f6388 | 1004 | |
ccc6cda3 | 1005 | if (current_readline_line == 0) |
726f6388 JA |
1006 | return (EOF); |
1007 | ||
ccc6cda3 | 1008 | current_readline_line_index = 0; |
726f6388 | 1009 | line_len = strlen (current_readline_line); |
ccc6cda3 | 1010 | |
726f6388 JA |
1011 | current_readline_line = xrealloc (current_readline_line, 2 + line_len); |
1012 | current_readline_line[line_len++] = '\n'; | |
1013 | current_readline_line[line_len] = '\0'; | |
1014 | } | |
1015 | ||
ccc6cda3 | 1016 | if (current_readline_line[current_readline_line_index] == 0) |
726f6388 JA |
1017 | { |
1018 | free (current_readline_line); | |
1019 | current_readline_line = (char *)NULL; | |
1020 | return (yy_readline_get ()); | |
1021 | } | |
1022 | else | |
1023 | { | |
ccc6cda3 | 1024 | c = (unsigned char)current_readline_line[current_readline_line_index++]; |
726f6388 JA |
1025 | return (c); |
1026 | } | |
1027 | } | |
1028 | ||
1029 | static int | |
1030 | yy_readline_unget (c) | |
ccc6cda3 | 1031 | int c; |
726f6388 JA |
1032 | { |
1033 | if (current_readline_line_index && current_readline_line) | |
1034 | current_readline_line[--current_readline_line_index] = c; | |
1035 | return (c); | |
1036 | } | |
1037 | ||
ccc6cda3 | 1038 | void |
726f6388 JA |
1039 | with_input_from_stdin () |
1040 | { | |
1041 | INPUT_STREAM location; | |
1042 | ||
1043 | if (bash_input.type != st_stdin && stream_on_stack (st_stdin) == 0) | |
1044 | { | |
1045 | location.string = current_readline_line; | |
1046 | init_yy_io (yy_readline_get, yy_readline_unget, | |
1047 | st_stdin, "readline stdin", location); | |
1048 | } | |
1049 | } | |
1050 | ||
1051 | #else /* !READLINE */ | |
1052 | ||
1053 | void | |
1054 | with_input_from_stdin () | |
1055 | { | |
1056 | with_input_from_stream (stdin, "stdin"); | |
1057 | } | |
1058 | #endif /* !READLINE */ | |
1059 | ||
1060 | /* **************************************************************** */ | |
1061 | /* */ | |
1062 | /* Let input come from STRING. STRING is zero terminated. */ | |
1063 | /* */ | |
1064 | /* **************************************************************** */ | |
1065 | ||
1066 | static int | |
1067 | yy_string_get () | |
1068 | { | |
ccc6cda3 | 1069 | register char *string; |
726f6388 JA |
1070 | register int c; |
1071 | ||
1072 | string = bash_input.location.string; | |
1073 | c = EOF; | |
1074 | ||
1075 | /* If the string doesn't exist, or is empty, EOF found. */ | |
1076 | if (string && *string) | |
1077 | { | |
ccc6cda3 | 1078 | c = *(unsigned char *)string++; |
726f6388 JA |
1079 | bash_input.location.string = string; |
1080 | } | |
1081 | return (c); | |
1082 | } | |
1083 | ||
1084 | static int | |
1085 | yy_string_unget (c) | |
1086 | int c; | |
1087 | { | |
1088 | *(--bash_input.location.string) = c; | |
1089 | return (c); | |
1090 | } | |
1091 | ||
1092 | void | |
1093 | with_input_from_string (string, name) | |
ccc6cda3 | 1094 | char *string, *name; |
726f6388 JA |
1095 | { |
1096 | INPUT_STREAM location; | |
1097 | ||
1098 | location.string = string; | |
726f6388 JA |
1099 | init_yy_io (yy_string_get, yy_string_unget, st_string, name, location); |
1100 | } | |
1101 | ||
1102 | /* **************************************************************** */ | |
1103 | /* */ | |
1104 | /* Let input come from STREAM. */ | |
1105 | /* */ | |
1106 | /* **************************************************************** */ | |
1107 | ||
bb70624e JA |
1108 | /* These two functions used to test the value of the HAVE_RESTARTABLE_SYSCALLS |
1109 | define, and just use getc/ungetc if it was defined, but since bash | |
1110 | installs its signal handlers without the SA_RESTART flag, some signals | |
1111 | (like SIGCHLD, SIGWINCH, etc.) received during a read(2) will not cause | |
1112 | the read to be restarted. We need to restart it ourselves. */ | |
1113 | ||
726f6388 JA |
1114 | static int |
1115 | yy_stream_get () | |
1116 | { | |
bb70624e | 1117 | int result; |
726f6388 | 1118 | |
bb70624e | 1119 | result = EOF; |
726f6388 | 1120 | if (bash_input.location.file) |
bb70624e JA |
1121 | result = getc_with_restart (bash_input.location.file); |
1122 | ||
726f6388 JA |
1123 | return (result); |
1124 | } | |
1125 | ||
1126 | static int | |
1127 | yy_stream_unget (c) | |
1128 | int c; | |
1129 | { | |
726f6388 | 1130 | return (ungetc_with_restart (c, bash_input.location.file)); |
726f6388 JA |
1131 | } |
1132 | ||
1133 | void | |
1134 | with_input_from_stream (stream, name) | |
1135 | FILE *stream; | |
1136 | char *name; | |
1137 | { | |
1138 | INPUT_STREAM location; | |
1139 | ||
1140 | location.file = stream; | |
1141 | init_yy_io (yy_stream_get, yy_stream_unget, st_stream, name, location); | |
1142 | } | |
1143 | ||
1144 | typedef struct stream_saver { | |
1145 | struct stream_saver *next; | |
1146 | BASH_INPUT bash_input; | |
1147 | int line; | |
1148 | #if defined (BUFFERED_INPUT) | |
1149 | BUFFERED_STREAM *bstream; | |
1150 | #endif /* BUFFERED_INPUT */ | |
1151 | } STREAM_SAVER; | |
1152 | ||
1153 | /* The globally known line number. */ | |
1154 | int line_number = 0; | |
1155 | ||
cce855bc JA |
1156 | #if defined (COND_COMMAND) |
1157 | static int cond_lineno; | |
1158 | static int cond_token; | |
1159 | #endif | |
1160 | ||
726f6388 JA |
1161 | STREAM_SAVER *stream_list = (STREAM_SAVER *)NULL; |
1162 | ||
ccc6cda3 JA |
1163 | void |
1164 | push_stream (reset_lineno) | |
1165 | int reset_lineno; | |
726f6388 JA |
1166 | { |
1167 | STREAM_SAVER *saver = (STREAM_SAVER *)xmalloc (sizeof (STREAM_SAVER)); | |
1168 | ||
1169 | xbcopy ((char *)&bash_input, (char *)&(saver->bash_input), sizeof (BASH_INPUT)); | |
1170 | ||
1171 | #if defined (BUFFERED_INPUT) | |
1172 | saver->bstream = (BUFFERED_STREAM *)NULL; | |
1173 | /* If we have a buffered stream, clear out buffers[fd]. */ | |
1174 | if (bash_input.type == st_bstream && bash_input.location.buffered_fd >= 0) | |
cce855bc JA |
1175 | saver->bstream = set_buffered_stream (bash_input.location.buffered_fd, |
1176 | (BUFFERED_STREAM *)NULL); | |
726f6388 JA |
1177 | #endif /* BUFFERED_INPUT */ |
1178 | ||
1179 | saver->line = line_number; | |
1180 | bash_input.name = (char *)NULL; | |
1181 | saver->next = stream_list; | |
1182 | stream_list = saver; | |
ccc6cda3 JA |
1183 | EOF_Reached = 0; |
1184 | if (reset_lineno) | |
1185 | line_number = 0; | |
726f6388 JA |
1186 | } |
1187 | ||
ccc6cda3 | 1188 | void |
726f6388 JA |
1189 | pop_stream () |
1190 | { | |
726f6388 JA |
1191 | if (!stream_list) |
1192 | EOF_Reached = 1; | |
1193 | else | |
1194 | { | |
1195 | STREAM_SAVER *saver = stream_list; | |
1196 | ||
1197 | EOF_Reached = 0; | |
1198 | stream_list = stream_list->next; | |
1199 | ||
1200 | init_yy_io (saver->bash_input.getter, | |
1201 | saver->bash_input.ungetter, | |
1202 | saver->bash_input.type, | |
1203 | saver->bash_input.name, | |
1204 | saver->bash_input.location); | |
1205 | ||
1206 | #if defined (BUFFERED_INPUT) | |
1207 | /* If we have a buffered stream, restore buffers[fd]. */ | |
1208 | /* If the input file descriptor was changed while this was on the | |
1209 | save stack, update the buffered fd to the new file descriptor and | |
1210 | re-establish the buffer <-> bash_input fd correspondence. */ | |
1211 | if (bash_input.type == st_bstream && bash_input.location.buffered_fd >= 0) | |
28ef6c31 JA |
1212 | { |
1213 | if (bash_input_fd_changed) | |
726f6388 JA |
1214 | { |
1215 | bash_input_fd_changed = 0; | |
1216 | if (default_buffered_input >= 0) | |
1217 | { | |
1218 | bash_input.location.buffered_fd = default_buffered_input; | |
1219 | saver->bstream->b_fd = default_buffered_input; | |
28ef6c31 | 1220 | SET_CLOSE_ON_EXEC (default_buffered_input); |
726f6388 JA |
1221 | } |
1222 | } | |
28ef6c31 | 1223 | /* XXX could free buffered stream returned as result here. */ |
cce855bc | 1224 | set_buffered_stream (bash_input.location.buffered_fd, saver->bstream); |
28ef6c31 | 1225 | } |
726f6388 JA |
1226 | #endif /* BUFFERED_INPUT */ |
1227 | ||
1228 | line_number = saver->line; | |
1229 | ||
1230 | FREE (saver->bash_input.name); | |
1231 | free (saver); | |
1232 | } | |
1233 | } | |
1234 | ||
1235 | /* Return 1 if a stream of type TYPE is saved on the stack. */ | |
1236 | int | |
1237 | stream_on_stack (type) | |
ccc6cda3 | 1238 | enum stream_type type; |
726f6388 JA |
1239 | { |
1240 | register STREAM_SAVER *s; | |
ccc6cda3 | 1241 | |
726f6388 JA |
1242 | for (s = stream_list; s; s = s->next) |
1243 | if (s->bash_input.type == type) | |
1244 | return 1; | |
1245 | return 0; | |
1246 | } | |
1247 | ||
bb70624e JA |
1248 | /* Save the current token state and return it in a malloced array. */ |
1249 | int * | |
1250 | save_token_state () | |
1251 | { | |
1252 | int *ret; | |
1253 | ||
1254 | ret = (int *)xmalloc (3 * sizeof (int)); | |
1255 | ret[0] = last_read_token; | |
1256 | ret[1] = token_before_that; | |
1257 | ret[2] = two_tokens_ago; | |
1258 | return ret; | |
1259 | } | |
1260 | ||
1261 | void | |
1262 | restore_token_state (ts) | |
1263 | int *ts; | |
1264 | { | |
1265 | if (ts == 0) | |
1266 | return; | |
1267 | last_read_token = ts[0]; | |
1268 | token_before_that = ts[1]; | |
1269 | two_tokens_ago = ts[2]; | |
1270 | } | |
1271 | ||
726f6388 JA |
1272 | /* |
1273 | * This is used to inhibit alias expansion and reserved word recognition | |
ccc6cda3 JA |
1274 | * inside case statement pattern lists. A `case statement pattern list' is: |
1275 | * | |
726f6388 JA |
1276 | * everything between the `in' in a `case word in' and the next ')' |
1277 | * or `esac' | |
1278 | * everything between a `;;' and the next `)' or `esac' | |
1279 | */ | |
726f6388 | 1280 | |
cce855bc JA |
1281 | #if defined (ALIAS) || defined (DPAREN_ARITHMETIC) |
1282 | ||
1283 | #if !defined (ALIAS) | |
1284 | typedef void *alias_t; | |
1285 | #endif | |
ccc6cda3 JA |
1286 | |
1287 | #define END_OF_ALIAS 0 | |
1288 | ||
726f6388 JA |
1289 | /* |
1290 | * Pseudo-global variables used in implementing token-wise alias expansion. | |
1291 | */ | |
1292 | ||
726f6388 | 1293 | /* |
ccc6cda3 | 1294 | * Pushing and popping strings. This works together with shell_getc to |
726f6388 JA |
1295 | * implement alias expansion on a per-token basis. |
1296 | */ | |
1297 | ||
1298 | typedef struct string_saver { | |
1299 | struct string_saver *next; | |
1300 | int expand_alias; /* Value to set expand_alias to when string is popped. */ | |
1301 | char *saved_line; | |
cce855bc | 1302 | #if defined (ALIAS) |
ccc6cda3 | 1303 | alias_t *expander; /* alias that caused this line to be pushed. */ |
cce855bc | 1304 | #endif |
726f6388 JA |
1305 | int saved_line_size, saved_line_index, saved_line_terminator; |
1306 | } STRING_SAVER; | |
1307 | ||
1308 | STRING_SAVER *pushed_string_list = (STRING_SAVER *)NULL; | |
1309 | ||
726f6388 JA |
1310 | /* |
1311 | * Push the current shell_input_line onto a stack of such lines and make S | |
1312 | * the current input. Used when expanding aliases. EXPAND is used to set | |
1313 | * the value of expand_next_token when the string is popped, so that the | |
1314 | * word after the alias in the original line is handled correctly when the | |
1315 | * alias expands to multiple words. TOKEN is the token that was expanded | |
1316 | * into S; it is saved and used to prevent infinite recursive expansion. | |
1317 | */ | |
1318 | static void | |
ccc6cda3 | 1319 | push_string (s, expand, ap) |
726f6388 JA |
1320 | char *s; |
1321 | int expand; | |
ccc6cda3 | 1322 | alias_t *ap; |
726f6388 JA |
1323 | { |
1324 | STRING_SAVER *temp = (STRING_SAVER *) xmalloc (sizeof (STRING_SAVER)); | |
1325 | ||
1326 | temp->expand_alias = expand; | |
1327 | temp->saved_line = shell_input_line; | |
1328 | temp->saved_line_size = shell_input_line_size; | |
1329 | temp->saved_line_index = shell_input_line_index; | |
1330 | temp->saved_line_terminator = shell_input_line_terminator; | |
cce855bc | 1331 | #if defined (ALIAS) |
ccc6cda3 | 1332 | temp->expander = ap; |
cce855bc | 1333 | #endif |
726f6388 JA |
1334 | temp->next = pushed_string_list; |
1335 | pushed_string_list = temp; | |
1336 | ||
cce855bc | 1337 | #if defined (ALIAS) |
d166f048 JA |
1338 | if (ap) |
1339 | ap->flags |= AL_BEINGEXPANDED; | |
cce855bc | 1340 | #endif |
726f6388 JA |
1341 | |
1342 | shell_input_line = s; | |
1343 | shell_input_line_size = strlen (s); | |
1344 | shell_input_line_index = 0; | |
1345 | shell_input_line_terminator = '\0'; | |
ccc6cda3 | 1346 | parser_state &= ~PST_ALEXPNEXT; |
726f6388 JA |
1347 | } |
1348 | ||
1349 | /* | |
1350 | * Make the top of the pushed_string stack be the current shell input. | |
1351 | * Only called when there is something on the stack. Called from shell_getc | |
1352 | * when it thinks it has consumed the string generated by an alias expansion | |
1353 | * and needs to return to the original input line. | |
1354 | */ | |
1355 | static void | |
1356 | pop_string () | |
1357 | { | |
1358 | STRING_SAVER *t; | |
1359 | ||
1360 | FREE (shell_input_line); | |
1361 | shell_input_line = pushed_string_list->saved_line; | |
1362 | shell_input_line_index = pushed_string_list->saved_line_index; | |
1363 | shell_input_line_size = pushed_string_list->saved_line_size; | |
1364 | shell_input_line_terminator = pushed_string_list->saved_line_terminator; | |
ccc6cda3 JA |
1365 | |
1366 | if (pushed_string_list->expand_alias) | |
1367 | parser_state |= PST_ALEXPNEXT; | |
1368 | else | |
1369 | parser_state &= ~PST_ALEXPNEXT; | |
726f6388 JA |
1370 | |
1371 | t = pushed_string_list; | |
1372 | pushed_string_list = pushed_string_list->next; | |
ccc6cda3 | 1373 | |
cce855bc | 1374 | #if defined (ALIAS) |
d166f048 JA |
1375 | if (t->expander) |
1376 | t->expander->flags &= ~AL_BEINGEXPANDED; | |
cce855bc | 1377 | #endif |
ccc6cda3 JA |
1378 | |
1379 | free ((char *)t); | |
726f6388 JA |
1380 | } |
1381 | ||
1382 | static void | |
1383 | free_string_list () | |
1384 | { | |
ccc6cda3 | 1385 | register STRING_SAVER *t, *t1; |
726f6388 | 1386 | |
ccc6cda3 | 1387 | for (t = pushed_string_list; t; ) |
726f6388 JA |
1388 | { |
1389 | t1 = t->next; | |
1390 | FREE (t->saved_line); | |
cce855bc JA |
1391 | #if defined (ALIAS) |
1392 | if (t->expander) | |
1393 | t->expander->flags &= ~AL_BEINGEXPANDED; | |
1394 | #endif | |
726f6388 JA |
1395 | free ((char *)t); |
1396 | t = t1; | |
1397 | } | |
1398 | pushed_string_list = (STRING_SAVER *)NULL; | |
1399 | } | |
1400 | ||
cce855bc | 1401 | #endif /* ALIAS || DPAREN_ARITHMETIC */ |
ccc6cda3 | 1402 | |
726f6388 JA |
1403 | /* Return a line of text, taken from wherever yylex () reads input. |
1404 | If there is no more input, then we return NULL. If REMOVE_QUOTED_NEWLINE | |
1405 | is non-zero, we remove unquoted \<newline> pairs. This is used by | |
1406 | read_secondary_line to read here documents. */ | |
1407 | static char * | |
1408 | read_a_line (remove_quoted_newline) | |
1409 | int remove_quoted_newline; | |
1410 | { | |
1411 | static char *line_buffer = (char *)NULL; | |
1412 | static int buffer_size = 0; | |
1413 | int indx = 0, c, peekc, pass_next; | |
1414 | ||
ccc6cda3 JA |
1415 | #if defined (READLINE) |
1416 | if (interactive && bash_input.type != st_string && no_line_editing) | |
1417 | #else | |
1418 | if (interactive && bash_input.type != st_string) | |
1419 | #endif | |
1420 | print_prompt (); | |
1421 | ||
726f6388 JA |
1422 | pass_next = 0; |
1423 | while (1) | |
1424 | { | |
1425 | c = yy_getc (); | |
1426 | ||
1427 | /* Allow immediate exit if interrupted during input. */ | |
1428 | QUIT; | |
1429 | ||
28ef6c31 | 1430 | /* Ignore null bytes in input. */ |
726f6388 | 1431 | if (c == 0) |
28ef6c31 JA |
1432 | { |
1433 | #if 0 | |
1434 | internal_warning ("read_a_line: ignored null byte in input"); | |
1435 | #endif | |
1436 | continue; | |
1437 | } | |
726f6388 JA |
1438 | |
1439 | /* If there is no more input, then we return NULL. */ | |
1440 | if (c == EOF) | |
1441 | { | |
ccc6cda3 JA |
1442 | if (interactive && bash_input.type == st_stream) |
1443 | clearerr (stdin); | |
726f6388 JA |
1444 | if (indx == 0) |
1445 | return ((char *)NULL); | |
1446 | c = '\n'; | |
1447 | } | |
1448 | ||
1449 | /* `+2' in case the final character in the buffer is a newline. */ | |
ccc6cda3 | 1450 | RESIZE_MALLOCED_BUFFER (line_buffer, indx, 2, buffer_size, 128); |
726f6388 JA |
1451 | |
1452 | /* IF REMOVE_QUOTED_NEWLINES is non-zero, we are reading a | |
1453 | here document with an unquoted delimiter. In this case, | |
1454 | the line will be expanded as if it were in double quotes. | |
1455 | We allow a backslash to escape the next character, but we | |
1456 | need to treat the backslash specially only if a backslash | |
1457 | quoting a backslash-newline pair appears in the line. */ | |
1458 | if (pass_next) | |
28ef6c31 | 1459 | { |
726f6388 JA |
1460 | line_buffer[indx++] = c; |
1461 | pass_next = 0; | |
28ef6c31 | 1462 | } |
726f6388 JA |
1463 | else if (c == '\\' && remove_quoted_newline) |
1464 | { | |
1465 | peekc = yy_getc (); | |
1466 | if (peekc == '\n') | |
1467 | continue; /* Make the unquoted \<newline> pair disappear. */ | |
1468 | else | |
1469 | { | |
1470 | yy_ungetc (peekc); | |
1471 | pass_next = 1; | |
1472 | line_buffer[indx++] = c; /* Preserve the backslash. */ | |
1473 | } | |
1474 | } | |
1475 | else | |
1476 | line_buffer[indx++] = c; | |
1477 | ||
1478 | if (c == '\n') | |
1479 | { | |
1480 | line_buffer[indx] = '\0'; | |
1481 | return (line_buffer); | |
1482 | } | |
1483 | } | |
1484 | } | |
1485 | ||
1486 | /* Return a line as in read_a_line (), but insure that the prompt is | |
1487 | the secondary prompt. This is used to read the lines of a here | |
1488 | document. REMOVE_QUOTED_NEWLINE is non-zero if we should remove | |
1489 | newlines quoted with backslashes while reading the line. It is | |
1490 | non-zero unless the delimiter of the here document was quoted. */ | |
1491 | char * | |
1492 | read_secondary_line (remove_quoted_newline) | |
1493 | int remove_quoted_newline; | |
1494 | { | |
1495 | prompt_string_pointer = &ps2_prompt; | |
1496 | prompt_again (); | |
1497 | return (read_a_line (remove_quoted_newline)); | |
1498 | } | |
1499 | ||
726f6388 JA |
1500 | /* **************************************************************** */ |
1501 | /* */ | |
1502 | /* YYLEX () */ | |
1503 | /* */ | |
1504 | /* **************************************************************** */ | |
1505 | ||
1506 | /* Reserved words. These are only recognized as the first word of a | |
1507 | command. */ | |
1508 | STRING_INT_ALIST word_token_alist[] = { | |
1509 | { "if", IF }, | |
1510 | { "then", THEN }, | |
1511 | { "else", ELSE }, | |
1512 | { "elif", ELIF }, | |
1513 | { "fi", FI }, | |
1514 | { "case", CASE }, | |
1515 | { "esac", ESAC }, | |
1516 | { "for", FOR }, | |
1517 | #if defined (SELECT_COMMAND) | |
1518 | { "select", SELECT }, | |
1519 | #endif | |
1520 | { "while", WHILE }, | |
1521 | { "until", UNTIL }, | |
1522 | { "do", DO }, | |
1523 | { "done", DONE }, | |
1524 | { "in", IN }, | |
1525 | { "function", FUNCTION }, | |
ccc6cda3 JA |
1526 | #if defined (COMMAND_TIMING) |
1527 | { "time", TIME }, | |
1528 | #endif | |
726f6388 JA |
1529 | { "{", '{' }, |
1530 | { "}", '}' }, | |
1531 | { "!", BANG }, | |
cce855bc JA |
1532 | #if defined (COND_COMMAND) |
1533 | { "[[", COND_START }, | |
1534 | { "]]", COND_END }, | |
1535 | #endif | |
726f6388 JA |
1536 | { (char *)NULL, 0} |
1537 | }; | |
1538 | ||
b72432fd | 1539 | /* XXX - we should also have an alist with strings for other tokens, so we |
28ef6c31 JA |
1540 | can give more descriptive error messages. Look at y.tab.h for the |
1541 | other tokens. */ | |
b72432fd | 1542 | |
ccc6cda3 JA |
1543 | /* These are used by read_token_word, but appear up here so that shell_getc |
1544 | can use them to decide when to add otherwise blank lines to the history. */ | |
1545 | ||
1546 | /* The primary delimiter stack. */ | |
1547 | struct dstack dstack = { (char *)NULL, 0, 0 }; | |
1548 | ||
1549 | /* A temporary delimiter stack to be used when decoding prompt strings. | |
1550 | This is needed because command substitutions in prompt strings (e.g., PS2) | |
1551 | can screw up the parser's quoting state. */ | |
1552 | static struct dstack temp_dstack = { (char *)NULL, 0, 0 }; | |
1553 | ||
1554 | /* Macro for accessing the top delimiter on the stack. Returns the | |
1555 | delimiter or zero if none. */ | |
1556 | #define current_delimiter(ds) \ | |
1557 | (ds.delimiter_depth ? ds.delimiters[ds.delimiter_depth - 1] : 0) | |
1558 | ||
1559 | #define push_delimiter(ds, character) \ | |
1560 | do \ | |
1561 | { \ | |
1562 | if (ds.delimiter_depth + 2 > ds.delimiter_space) \ | |
1563 | ds.delimiters = xrealloc \ | |
1564 | (ds.delimiters, (ds.delimiter_space += 10) * sizeof (char)); \ | |
1565 | ds.delimiters[ds.delimiter_depth] = character; \ | |
1566 | ds.delimiter_depth++; \ | |
1567 | } \ | |
1568 | while (0) | |
1569 | ||
1570 | #define pop_delimiter(ds) ds.delimiter_depth-- | |
1571 | ||
726f6388 JA |
1572 | /* Return the next shell input character. This always reads characters |
1573 | from shell_input_line; when that line is exhausted, it is time to | |
1574 | read the next line. This is called by read_token when the shell is | |
1575 | processing normal command input. */ | |
ccc6cda3 | 1576 | |
28ef6c31 JA |
1577 | /* This implements one-character lookahead/lookbehind across physical input |
1578 | lines, to avoid something being lost because it's pushed back with | |
1579 | shell_ungetc when we're at the start of a line. */ | |
1580 | static int eol_ungetc_lookahead = 0; | |
1581 | ||
726f6388 JA |
1582 | static int |
1583 | shell_getc (remove_quoted_newline) | |
1584 | int remove_quoted_newline; | |
1585 | { | |
ccc6cda3 | 1586 | register int i; |
726f6388 | 1587 | int c; |
ccc6cda3 | 1588 | static int mustpop = 0; |
726f6388 JA |
1589 | |
1590 | QUIT; | |
1591 | ||
28ef6c31 JA |
1592 | if (eol_ungetc_lookahead) |
1593 | { | |
1594 | c = eol_ungetc_lookahead; | |
1595 | eol_ungetc_lookahead = 0; | |
1596 | return (c); | |
1597 | } | |
1598 | ||
cce855bc | 1599 | #if defined (ALIAS) || defined (DPAREN_ARITHMETIC) |
726f6388 JA |
1600 | /* If shell_input_line[shell_input_line_index] == 0, but there is |
1601 | something on the pushed list of strings, then we don't want to go | |
1602 | off and get another line. We let the code down below handle it. */ | |
1603 | ||
1604 | if (!shell_input_line || ((!shell_input_line[shell_input_line_index]) && | |
1605 | (pushed_string_list == (STRING_SAVER *)NULL))) | |
cce855bc | 1606 | #else /* !ALIAS && !DPAREN_ARITHMETIC */ |
726f6388 | 1607 | if (!shell_input_line || !shell_input_line[shell_input_line_index]) |
cce855bc | 1608 | #endif /* !ALIAS && !DPAREN_ARITHMETIC */ |
726f6388 | 1609 | { |
726f6388 JA |
1610 | line_number++; |
1611 | ||
1612 | restart_read: | |
1613 | ||
1614 | /* Allow immediate exit if interrupted during input. */ | |
1615 | QUIT; | |
1616 | ||
1617 | i = 0; | |
1618 | shell_input_line_terminator = 0; | |
1619 | ||
1620 | #if defined (JOB_CONTROL) | |
1621 | /* This can cause a problem when reading a command as the result | |
1622 | of a trap, when the trap is called from flush_child. This call | |
1623 | had better not cause jobs to disappear from the job table in | |
1624 | that case, or we will have big trouble. */ | |
1625 | notify_and_cleanup (); | |
1626 | #else /* !JOB_CONTROL */ | |
1627 | cleanup_dead_jobs (); | |
1628 | #endif /* !JOB_CONTROL */ | |
1629 | ||
1630 | #if defined (READLINE) | |
1631 | if (interactive && bash_input.type != st_string && no_line_editing) | |
1632 | #else | |
1633 | if (interactive && bash_input.type != st_string) | |
1634 | #endif | |
1635 | print_prompt (); | |
1636 | ||
1637 | if (bash_input.type == st_stream) | |
1638 | clearerr (stdin); | |
1639 | ||
28ef6c31 | 1640 | while (1) |
726f6388 | 1641 | { |
28ef6c31 JA |
1642 | c = yy_getc (); |
1643 | ||
726f6388 JA |
1644 | /* Allow immediate exit if interrupted during input. */ |
1645 | QUIT; | |
1646 | ||
28ef6c31 JA |
1647 | if (c == '\0') |
1648 | { | |
1649 | #if 0 | |
1650 | internal_warning ("shell_getc: ignored null byte in input"); | |
1651 | #endif | |
1652 | continue; | |
1653 | } | |
1654 | ||
ccc6cda3 | 1655 | RESIZE_MALLOCED_BUFFER (shell_input_line, i, 2, shell_input_line_size, 256); |
726f6388 JA |
1656 | |
1657 | if (c == EOF) | |
1658 | { | |
1659 | if (bash_input.type == st_stream) | |
1660 | clearerr (stdin); | |
1661 | ||
ccc6cda3 | 1662 | if (i == 0) |
726f6388 JA |
1663 | shell_input_line_terminator = EOF; |
1664 | ||
1665 | shell_input_line[i] = '\0'; | |
1666 | break; | |
1667 | } | |
1668 | ||
1669 | shell_input_line[i++] = c; | |
1670 | ||
1671 | if (c == '\n') | |
1672 | { | |
1673 | shell_input_line[--i] = '\0'; | |
1674 | current_command_line_count++; | |
1675 | break; | |
1676 | } | |
1677 | } | |
28ef6c31 | 1678 | |
726f6388 JA |
1679 | shell_input_line_index = 0; |
1680 | shell_input_line_len = i; /* == strlen (shell_input_line) */ | |
1681 | ||
1682 | #if defined (HISTORY) | |
ccc6cda3 | 1683 | if (remember_on_history && shell_input_line && shell_input_line[0]) |
726f6388 JA |
1684 | { |
1685 | char *expansions; | |
ccc6cda3 JA |
1686 | # if defined (BANG_HISTORY) |
1687 | int old_hist; | |
1688 | ||
1689 | /* If the current delimiter is a single quote, we should not be | |
1690 | performing history expansion, even if we're on a different | |
1691 | line from the original single quote. */ | |
1692 | old_hist = history_expansion_inhibited; | |
1693 | if (current_delimiter (dstack) == '\'') | |
1694 | history_expansion_inhibited = 1; | |
1695 | # endif | |
726f6388 | 1696 | expansions = pre_process_line (shell_input_line, 1, 1); |
ccc6cda3 JA |
1697 | # if defined (BANG_HISTORY) |
1698 | history_expansion_inhibited = old_hist; | |
1699 | # endif | |
d166f048 JA |
1700 | if (expansions != shell_input_line) |
1701 | { | |
1702 | free (shell_input_line); | |
1703 | shell_input_line = expansions; | |
1704 | shell_input_line_len = shell_input_line ? | |
1705 | strlen (shell_input_line) : 0; | |
1706 | if (!shell_input_line_len) | |
1707 | current_command_line_count--; | |
1708 | ||
1709 | /* We have to force the xrealloc below because we don't know | |
28ef6c31 | 1710 | the true allocated size of shell_input_line anymore. */ |
d166f048 JA |
1711 | shell_input_line_size = shell_input_line_len; |
1712 | } | |
726f6388 | 1713 | } |
28ef6c31 JA |
1714 | /* Try to do something intelligent with blank lines encountered while |
1715 | entering multi-line commands. XXX - this is grotesque */ | |
ccc6cda3 JA |
1716 | else if (remember_on_history && shell_input_line && |
1717 | shell_input_line[0] == '\0' && | |
28ef6c31 | 1718 | current_command_line_count > 1) |
ccc6cda3 | 1719 | { |
28ef6c31 JA |
1720 | if (current_delimiter (dstack)) |
1721 | /* We know shell_input_line[0] == 0 and we're reading some sort of | |
1722 | quoted string. This means we've got a line consisting of only | |
1723 | a newline in a quoted string. We want to make sure this line | |
1724 | gets added to the history. */ | |
1725 | maybe_add_history (shell_input_line); | |
1726 | else | |
1727 | { | |
1728 | char *hdcs; | |
1729 | hdcs = history_delimiting_chars (); | |
1730 | if (hdcs && hdcs[0] == ';') | |
1731 | maybe_add_history (shell_input_line); | |
1732 | } | |
ccc6cda3 JA |
1733 | } |
1734 | ||
726f6388 JA |
1735 | #endif /* HISTORY */ |
1736 | ||
1737 | if (shell_input_line) | |
1738 | { | |
1739 | /* Lines that signify the end of the shell's input should not be | |
1740 | echoed. */ | |
1741 | if (echo_input_at_read && (shell_input_line[0] || | |
1742 | shell_input_line_terminator != EOF)) | |
1743 | fprintf (stderr, "%s\n", shell_input_line); | |
1744 | } | |
1745 | else | |
1746 | { | |
1747 | shell_input_line_size = 0; | |
1748 | prompt_string_pointer = ¤t_prompt_string; | |
1749 | prompt_again (); | |
1750 | goto restart_read; | |
1751 | } | |
1752 | ||
1753 | /* Add the newline to the end of this string, iff the string does | |
1754 | not already end in an EOF character. */ | |
1755 | if (shell_input_line_terminator != EOF) | |
1756 | { | |
ccc6cda3 | 1757 | if (shell_input_line_len + 3 > shell_input_line_size) |
726f6388 JA |
1758 | shell_input_line = xrealloc (shell_input_line, |
1759 | 1 + (shell_input_line_size += 2)); | |
1760 | ||
ccc6cda3 JA |
1761 | shell_input_line[shell_input_line_len] = '\n'; |
1762 | shell_input_line[shell_input_line_len + 1] = '\0'; | |
726f6388 JA |
1763 | } |
1764 | } | |
ccc6cda3 | 1765 | |
726f6388 JA |
1766 | c = shell_input_line[shell_input_line_index]; |
1767 | ||
1768 | if (c) | |
1769 | shell_input_line_index++; | |
1770 | ||
1771 | if (c == '\\' && remove_quoted_newline && | |
1772 | shell_input_line[shell_input_line_index] == '\n') | |
1773 | { | |
1774 | prompt_again (); | |
ccc6cda3 JA |
1775 | line_number++; |
1776 | goto restart_read; | |
726f6388 JA |
1777 | } |
1778 | ||
cce855bc | 1779 | #if defined (ALIAS) || defined (DPAREN_ARITHMETIC) |
726f6388 JA |
1780 | /* If C is NULL, we have reached the end of the current input string. If |
1781 | pushed_string_list is non-empty, it's time to pop to the previous string | |
1782 | because we have fully consumed the result of the last alias expansion. | |
1783 | Do it transparently; just return the next character of the string popped | |
1784 | to. */ | |
1785 | if (!c && (pushed_string_list != (STRING_SAVER *)NULL)) | |
1786 | { | |
ccc6cda3 | 1787 | if (mustpop) |
28ef6c31 JA |
1788 | { |
1789 | pop_string (); | |
1790 | c = shell_input_line[shell_input_line_index]; | |
ccc6cda3 JA |
1791 | if (c) |
1792 | shell_input_line_index++; | |
1793 | mustpop--; | |
28ef6c31 | 1794 | } |
ccc6cda3 | 1795 | else |
28ef6c31 JA |
1796 | { |
1797 | mustpop++; | |
1798 | c = ' '; | |
1799 | } | |
726f6388 | 1800 | } |
cce855bc | 1801 | #endif /* ALIAS || DPAREN_ARITHMETIC */ |
726f6388 JA |
1802 | |
1803 | if (!c && shell_input_line_terminator == EOF) | |
ccc6cda3 | 1804 | return ((shell_input_line_index != 0) ? '\n' : EOF); |
726f6388 JA |
1805 | |
1806 | return ((unsigned char)c); | |
1807 | } | |
1808 | ||
1809 | /* Put C back into the input for the shell. */ | |
1810 | static void | |
1811 | shell_ungetc (c) | |
1812 | int c; | |
1813 | { | |
1814 | if (shell_input_line && shell_input_line_index) | |
1815 | shell_input_line[--shell_input_line_index] = c; | |
28ef6c31 JA |
1816 | else |
1817 | eol_ungetc_lookahead = c; | |
726f6388 JA |
1818 | } |
1819 | ||
ccc6cda3 JA |
1820 | static void |
1821 | shell_ungetchar () | |
1822 | { | |
1823 | if (shell_input_line && shell_input_line_index) | |
1824 | shell_input_line_index--; | |
1825 | } | |
1826 | ||
1827 | /* Discard input until CHARACTER is seen, then push that character back | |
1828 | onto the input stream. */ | |
726f6388 JA |
1829 | static void |
1830 | discard_until (character) | |
1831 | int character; | |
1832 | { | |
1833 | int c; | |
1834 | ||
1835 | while ((c = shell_getc (0)) != EOF && c != character) | |
1836 | ; | |
1837 | ||
1838 | if (c != EOF) | |
1839 | shell_ungetc (c); | |
1840 | } | |
726f6388 JA |
1841 | |
1842 | void | |
1843 | execute_prompt_command (command) | |
1844 | char *command; | |
1845 | { | |
1846 | Function *temp_last, *temp_this; | |
1847 | char *last_lastarg; | |
1848 | int temp_exit_value, temp_eof_encountered; | |
1849 | ||
1850 | temp_last = last_shell_builtin; | |
1851 | temp_this = this_shell_builtin; | |
1852 | temp_exit_value = last_command_exit_value; | |
1853 | temp_eof_encountered = eof_encountered; | |
1854 | last_lastarg = get_string_value ("_"); | |
1855 | if (last_lastarg) | |
1856 | last_lastarg = savestring (last_lastarg); | |
1857 | ||
d166f048 | 1858 | parse_and_execute (savestring (command), "PROMPT_COMMAND", SEVAL_NONINT|SEVAL_NOHIST); |
726f6388 JA |
1859 | |
1860 | last_shell_builtin = temp_last; | |
1861 | this_shell_builtin = temp_this; | |
1862 | last_command_exit_value = temp_exit_value; | |
1863 | eof_encountered = temp_eof_encountered; | |
1864 | ||
1865 | bind_variable ("_", last_lastarg); | |
1866 | FREE (last_lastarg); | |
1867 | ||
ccc6cda3 | 1868 | if (token_to_read == '\n') /* reset_parser was called */ |
726f6388 JA |
1869 | token_to_read = 0; |
1870 | } | |
1871 | ||
ccc6cda3 JA |
1872 | /* Place to remember the token. We try to keep the buffer |
1873 | at a reasonable size, but it can grow. */ | |
1874 | static char *token = (char *)NULL; | |
1875 | ||
1876 | /* Current size of the token buffer. */ | |
1877 | static int token_buffer_size; | |
1878 | ||
726f6388 JA |
1879 | /* Command to read_token () explaining what we want it to do. */ |
1880 | #define READ 0 | |
1881 | #define RESET 1 | |
1882 | #define prompt_is_ps1 \ | |
1883 | (!prompt_string_pointer || prompt_string_pointer == &ps1_prompt) | |
1884 | ||
1885 | /* Function for yyparse to call. yylex keeps track of | |
1886 | the last two tokens read, and calls read_token. */ | |
ccc6cda3 | 1887 | static int |
726f6388 JA |
1888 | yylex () |
1889 | { | |
ccc6cda3 | 1890 | if (interactive && (current_token == 0 || current_token == '\n')) |
726f6388 JA |
1891 | { |
1892 | /* Before we print a prompt, we might have to check mailboxes. | |
1893 | We do this only if it is time to do so. Notice that only here | |
1894 | is the mail alarm reset; nothing takes place in check_mail () | |
1895 | except the checking of mail. Please don't change this. */ | |
1896 | if (prompt_is_ps1 && time_to_check_mail ()) | |
1897 | { | |
1898 | check_mail (); | |
1899 | reset_mail_timer (); | |
1900 | } | |
1901 | ||
1902 | /* Avoid printing a prompt if we're not going to read anything, e.g. | |
1903 | after resetting the parser with read_token (RESET). */ | |
1904 | if (token_to_read == 0 && interactive) | |
1905 | prompt_again (); | |
1906 | } | |
1907 | ||
ccc6cda3 | 1908 | two_tokens_ago = token_before_that; |
726f6388 JA |
1909 | token_before_that = last_read_token; |
1910 | last_read_token = current_token; | |
1911 | current_token = read_token (READ); | |
1912 | return (current_token); | |
1913 | } | |
1914 | ||
726f6388 JA |
1915 | /* When non-zero, we have read the required tokens |
1916 | which allow ESAC to be the next one read. */ | |
ccc6cda3 | 1917 | static int esacs_needed_count; |
726f6388 JA |
1918 | |
1919 | void | |
1920 | gather_here_documents () | |
1921 | { | |
1922 | int r = 0; | |
1923 | while (need_here_doc) | |
1924 | { | |
1925 | make_here_document (redir_stack[r++]); | |
1926 | need_here_doc--; | |
1927 | } | |
1928 | } | |
1929 | ||
726f6388 JA |
1930 | /* When non-zero, an open-brace used to create a group is awaiting a close |
1931 | brace partner. */ | |
ccc6cda3 | 1932 | static int open_brace_count; |
726f6388 JA |
1933 | |
1934 | #define command_token_position(token) \ | |
1935 | (((token) == ASSIGNMENT_WORD) || \ | |
1936 | ((token) != SEMI_SEMI && reserved_word_acceptable(token))) | |
1937 | ||
1938 | #define assignment_acceptable(token) command_token_position(token) && \ | |
ccc6cda3 | 1939 | ((parser_state & PST_CASEPAT) == 0) |
726f6388 JA |
1940 | |
1941 | /* Check to see if TOKEN is a reserved word and return the token | |
1942 | value if it is. */ | |
1943 | #define CHECK_FOR_RESERVED_WORD(tok) \ | |
1944 | do { \ | |
1945 | if (!dollar_present && !quoted && \ | |
1946 | reserved_word_acceptable (last_read_token)) \ | |
1947 | { \ | |
1948 | int i; \ | |
1949 | for (i = 0; word_token_alist[i].word != (char *)NULL; i++) \ | |
1950 | if (STREQ (tok, word_token_alist[i].word)) \ | |
1951 | { \ | |
ccc6cda3 | 1952 | if ((parser_state & PST_CASEPAT) && (word_token_alist[i].token != ESAC)) \ |
726f6388 | 1953 | break; \ |
cce855bc JA |
1954 | if (word_token_alist[i].token == TIME) \ |
1955 | break; \ | |
726f6388 | 1956 | if (word_token_alist[i].token == ESAC) \ |
ccc6cda3 JA |
1957 | parser_state &= ~(PST_CASEPAT|PST_CASESTMT); \ |
1958 | else if (word_token_alist[i].token == CASE) \ | |
1959 | parser_state |= PST_CASESTMT; \ | |
cce855bc JA |
1960 | else if (word_token_alist[i].token == COND_END) \ |
1961 | parser_state &= ~(PST_CONDCMD|PST_CONDEXPR); \ | |
1962 | else if (word_token_alist[i].token == COND_START) \ | |
1963 | parser_state |= PST_CONDCMD; \ | |
ccc6cda3 JA |
1964 | else if (word_token_alist[i].token == '{') \ |
1965 | open_brace_count++; \ | |
1966 | else if (word_token_alist[i].token == '}' && open_brace_count) \ | |
1967 | open_brace_count--; \ | |
726f6388 JA |
1968 | return (word_token_alist[i].token); \ |
1969 | } \ | |
1970 | } \ | |
1971 | } while (0) | |
1972 | ||
ccc6cda3 JA |
1973 | #if defined (ALIAS) |
1974 | ||
1975 | /* OK, we have a token. Let's try to alias expand it, if (and only if) | |
1976 | it's eligible. | |
1977 | ||
1978 | It is eligible for expansion if the shell is in interactive mode, and | |
1979 | the token is unquoted and the last token read was a command | |
1980 | separator (or expand_next_token is set), and we are currently | |
1981 | processing an alias (pushed_string_list is non-empty) and this | |
1982 | token is not the same as the current or any previously | |
1983 | processed alias. | |
1984 | ||
1985 | Special cases that disqualify: | |
1986 | In a pattern list in a case statement (parser_state & PST_CASEPAT). */ | |
1987 | static int | |
1988 | alias_expand_token (token) | |
1989 | char *token; | |
726f6388 | 1990 | { |
ccc6cda3 JA |
1991 | char *expanded; |
1992 | alias_t *ap; | |
726f6388 | 1993 | |
ccc6cda3 JA |
1994 | if (((parser_state & PST_ALEXPNEXT) || command_token_position (last_read_token)) && |
1995 | (parser_state & PST_CASEPAT) == 0) | |
726f6388 | 1996 | { |
ccc6cda3 JA |
1997 | ap = find_alias (token); |
1998 | ||
1999 | /* Currently expanding this token. */ | |
2000 | if (ap && (ap->flags & AL_BEINGEXPANDED)) | |
2001 | return (NO_EXPANSION); | |
2002 | ||
2003 | expanded = ap ? savestring (ap->value) : (char *)NULL; | |
2004 | if (expanded) | |
2005 | { | |
2006 | push_string (expanded, ap->flags & AL_EXPANDNEXT, ap); | |
2007 | return (RE_READ_TOKEN); | |
2008 | } | |
2009 | else | |
2010 | /* This is an eligible token that does not have an expansion. */ | |
2011 | return (NO_EXPANSION); | |
726f6388 | 2012 | } |
ccc6cda3 JA |
2013 | return (NO_EXPANSION); |
2014 | } | |
2015 | #endif /* ALIAS */ | |
726f6388 | 2016 | |
cce855bc JA |
2017 | static int |
2018 | time_command_acceptable () | |
2019 | { | |
2020 | #if defined (COMMAND_TIMING) | |
2021 | switch (last_read_token) | |
2022 | { | |
2023 | case 0: | |
2024 | case ';': | |
2025 | case '\n': | |
2026 | case AND_AND: | |
2027 | case OR_OR: | |
2028 | case '&': | |
b72432fd JA |
2029 | case DO: |
2030 | case THEN: | |
2031 | case ELSE: | |
28ef6c31 JA |
2032 | case '{': /* } */ |
2033 | case '(': /* ) */ | |
cce855bc JA |
2034 | return 1; |
2035 | default: | |
2036 | return 0; | |
2037 | } | |
2038 | #else | |
2039 | return 0; | |
2040 | #endif /* COMMAND_TIMING */ | |
2041 | } | |
2042 | ||
ccc6cda3 JA |
2043 | /* Handle special cases of token recognition: |
2044 | IN is recognized if the last token was WORD and the token | |
2045 | before that was FOR or CASE or SELECT. | |
2046 | ||
2047 | DO is recognized if the last token was WORD and the token | |
2048 | before that was FOR or SELECT. | |
2049 | ||
2050 | ESAC is recognized if the last token caused `esacs_needed_count' | |
2051 | to be set | |
2052 | ||
2053 | `{' is recognized if the last token as WORD and the token | |
28ef6c31 JA |
2054 | before that was FUNCTION, or if we just parsed an arithmetic |
2055 | `for' command. | |
ccc6cda3 | 2056 | |
28ef6c31 | 2057 | `}' is recognized if there is an unclosed `{' present. |
cce855bc JA |
2058 | |
2059 | `-p' is returned as TIMEOPT if the last read token was TIME. | |
2060 | ||
2061 | ']]' is returned as COND_END if the parser is currently parsing | |
2062 | a conditional expression ((parser_state & PST_CONDEXPR) != 0) | |
2063 | ||
2064 | `time' is returned as TIME if and only if it is immediately | |
2065 | preceded by one of `;', `\n', `||', `&&', or `&'. | |
ccc6cda3 JA |
2066 | */ |
2067 | ||
2068 | static int | |
2069 | special_case_tokens (token) | |
2070 | char *token; | |
2071 | { | |
2072 | if ((last_read_token == WORD) && | |
2073 | #if defined (SELECT_COMMAND) | |
2074 | ((token_before_that == FOR) || (token_before_that == CASE) || (token_before_that == SELECT)) && | |
2075 | #else | |
2076 | ((token_before_that == FOR) || (token_before_that == CASE)) && | |
2077 | #endif | |
2078 | (token[0] == 'i' && token[1] == 'n' && token[2] == 0)) | |
726f6388 | 2079 | { |
ccc6cda3 JA |
2080 | if (token_before_that == CASE) |
2081 | { | |
2082 | parser_state |= PST_CASEPAT; | |
2083 | esacs_needed_count++; | |
2084 | } | |
2085 | return (IN); | |
2086 | } | |
726f6388 | 2087 | |
ccc6cda3 JA |
2088 | if (last_read_token == WORD && |
2089 | #if defined (SELECT_COMMAND) | |
2090 | (token_before_that == FOR || token_before_that == SELECT) && | |
2091 | #else | |
2092 | (token_before_that == FOR) && | |
2093 | #endif | |
2094 | (token[0] == 'd' && token[1] == 'o' && token[2] == '\0')) | |
2095 | return (DO); | |
2096 | ||
2097 | /* Ditto for ESAC in the CASE case. | |
2098 | Specifically, this handles "case word in esac", which is a legal | |
2099 | construct, certainly because someone will pass an empty arg to the | |
2100 | case construct, and we don't want it to barf. Of course, we should | |
2101 | insist that the case construct has at least one pattern in it, but | |
2102 | the designers disagree. */ | |
2103 | if (esacs_needed_count) | |
2104 | { | |
2105 | esacs_needed_count--; | |
2106 | if (STREQ (token, "esac")) | |
726f6388 | 2107 | { |
ccc6cda3 JA |
2108 | parser_state &= ~PST_CASEPAT; |
2109 | return (ESAC); | |
726f6388 | 2110 | } |
ccc6cda3 | 2111 | } |
726f6388 | 2112 | |
ccc6cda3 JA |
2113 | /* The start of a shell function definition. */ |
2114 | if (parser_state & PST_ALLOWOPNBRC) | |
2115 | { | |
2116 | parser_state &= ~PST_ALLOWOPNBRC; | |
2117 | if (token[0] == '{' && token[1] == '\0') /* } */ | |
726f6388 | 2118 | { |
ccc6cda3 JA |
2119 | open_brace_count++; |
2120 | function_bstart = line_number; | |
2121 | return ('{'); /* } */ | |
726f6388 | 2122 | } |
ccc6cda3 JA |
2123 | } |
2124 | ||
28ef6c31 JA |
2125 | /* We allow a `do' after a for ((...)) without an intervening |
2126 | list_terminator */ | |
2127 | if (last_read_token == ARITH_FOR_EXPRS && token[0] == 'd' && token[1] == 'o' && !token[2]) | |
2128 | return (DO); | |
2129 | if (last_read_token == ARITH_FOR_EXPRS && token[0] == '{' && token[1] == '\0') /* } */ | |
2130 | { | |
2131 | open_brace_count++; | |
2132 | return ('{'); /* } */ | |
2133 | } | |
2134 | ||
ccc6cda3 JA |
2135 | if (open_brace_count && reserved_word_acceptable (last_read_token) && token[0] == '}' && !token[1]) |
2136 | { | |
2137 | open_brace_count--; /* { */ | |
2138 | return ('}'); | |
2139 | } | |
2140 | ||
cce855bc | 2141 | #if defined (COMMAND_TIMING) |
ccc6cda3 JA |
2142 | /* Handle -p after `time'. */ |
2143 | if (last_read_token == TIME && token[0] == '-' && token[1] == 'p' && !token[2]) | |
2144 | return (TIMEOPT); | |
cce855bc JA |
2145 | #endif |
2146 | ||
2147 | #if defined (COMMAND_TIMING) | |
b72432fd | 2148 | if (STREQ (token, "time") && ((parser_state & PST_CASEPAT) == 0) && time_command_acceptable ()) |
cce855bc JA |
2149 | return (TIME); |
2150 | #endif /* COMMAND_TIMING */ | |
2151 | ||
2152 | #if defined (COND_COMMAND) /* [[ */ | |
2153 | if ((parser_state & PST_CONDEXPR) && token[0] == ']' && token[1] == ']' && token[2] == '\0') | |
2154 | return (COND_END); | |
2155 | #endif | |
726f6388 | 2156 | |
ccc6cda3 JA |
2157 | return (-1); |
2158 | } | |
2159 | ||
2160 | /* Called from shell.c when Control-C is typed at top level. Or | |
2161 | by the error rule at top level. */ | |
2162 | void | |
2163 | reset_parser () | |
2164 | { | |
2165 | dstack.delimiter_depth = 0; /* No delimiters found so far. */ | |
2166 | open_brace_count = 0; | |
2167 | ||
2168 | parser_state = 0; | |
2169 | ||
cce855bc | 2170 | #if defined (ALIAS) || defined (DPAREN_ARITHMETIC) |
ccc6cda3 | 2171 | if (pushed_string_list) |
cce855bc JA |
2172 | free_string_list (); |
2173 | #endif /* ALIAS || DPAREN_ARITHMETIC */ | |
726f6388 | 2174 | |
ccc6cda3 JA |
2175 | if (shell_input_line) |
2176 | { | |
2177 | free (shell_input_line); | |
2178 | shell_input_line = (char *)NULL; | |
2179 | shell_input_line_size = shell_input_line_index = 0; | |
2180 | } | |
2181 | ||
2182 | FREE (word_desc_to_read); | |
2183 | word_desc_to_read = (WORD_DESC *)NULL; | |
2184 | ||
2185 | last_read_token = '\n'; | |
2186 | token_to_read = '\n'; | |
2187 | } | |
2188 | ||
2189 | /* Read the next token. Command can be READ (normal operation) or | |
2190 | RESET (to normalize state). */ | |
2191 | static int | |
2192 | read_token (command) | |
2193 | int command; | |
2194 | { | |
2195 | int character; /* Current character. */ | |
2196 | int peek_char; /* Temporary look-ahead character. */ | |
2197 | int result; /* The thing to return. */ | |
2198 | ||
2199 | if (command == RESET) | |
2200 | { | |
2201 | reset_parser (); | |
726f6388 JA |
2202 | return ('\n'); |
2203 | } | |
2204 | ||
2205 | if (token_to_read) | |
2206 | { | |
ccc6cda3 JA |
2207 | result = token_to_read; |
2208 | if (token_to_read == WORD || token_to_read == ASSIGNMENT_WORD) | |
d166f048 JA |
2209 | { |
2210 | yylval.word = word_desc_to_read; | |
2211 | word_desc_to_read = (WORD_DESC *)NULL; | |
2212 | } | |
726f6388 | 2213 | token_to_read = 0; |
ccc6cda3 | 2214 | return (result); |
726f6388 JA |
2215 | } |
2216 | ||
cce855bc JA |
2217 | #if defined (COND_COMMAND) |
2218 | if ((parser_state & (PST_CONDCMD|PST_CONDEXPR)) == PST_CONDCMD) | |
2219 | { | |
2220 | cond_lineno = line_number; | |
2221 | parser_state |= PST_CONDEXPR; | |
2222 | yylval.command = parse_cond_command (); | |
2223 | if (cond_token != COND_END) | |
2224 | { | |
2225 | if (EOF_Reached && cond_token != COND_ERROR) /* [[ */ | |
2226 | parser_error (cond_lineno, "unexpected EOF while looking for `]]'"); | |
2227 | else if (cond_token != COND_ERROR) | |
2228 | parser_error (cond_lineno, "syntax error in conditional expression"); | |
2229 | return (-1); | |
2230 | } | |
2231 | token_to_read = COND_END; | |
2232 | parser_state &= ~(PST_CONDEXPR|PST_CONDCMD); | |
2233 | return (COND_CMD); | |
2234 | } | |
2235 | #endif | |
2236 | ||
726f6388 | 2237 | #if defined (ALIAS) |
726f6388 JA |
2238 | /* This is a place to jump back to once we have successfully expanded a |
2239 | token with an alias and pushed the string with push_string () */ | |
2240 | re_read_token: | |
726f6388 JA |
2241 | #endif /* ALIAS */ |
2242 | ||
2243 | /* Read a single word from input. Start by skipping blanks. */ | |
ccc6cda3 JA |
2244 | while ((character = shell_getc (1)) != EOF && whitespace (character)) |
2245 | ; | |
726f6388 JA |
2246 | |
2247 | if (character == EOF) | |
2248 | { | |
2249 | EOF_Reached = 1; | |
2250 | return (yacc_EOF); | |
2251 | } | |
2252 | ||
2253 | if (character == '#' && (!interactive || interactive_comments)) | |
2254 | { | |
2255 | /* A comment. Discard until EOL or EOF, and then return a newline. */ | |
2256 | discard_until ('\n'); | |
2257 | shell_getc (0); | |
ccc6cda3 | 2258 | character = '\n'; /* this will take the next if statement and return. */ |
726f6388 JA |
2259 | } |
2260 | ||
2261 | if (character == '\n') | |
2262 | { | |
2263 | /* If we're about to return an unquoted newline, we can go and collect | |
2264 | the text of any pending here document. */ | |
2265 | if (need_here_doc) | |
2266 | gather_here_documents (); | |
2267 | ||
2268 | #if defined (ALIAS) | |
ccc6cda3 | 2269 | parser_state &= ~PST_ALEXPNEXT; |
726f6388 JA |
2270 | #endif /* ALIAS */ |
2271 | ||
2272 | return (character); | |
2273 | } | |
2274 | ||
ccc6cda3 JA |
2275 | /* Shell meta-characters. */ |
2276 | if (shellmeta (character) && ((parser_state & PST_DBLPAREN) == 0)) | |
726f6388 JA |
2277 | { |
2278 | #if defined (ALIAS) | |
2279 | /* Turn off alias tokenization iff this character sequence would | |
2280 | not leave us ready to read a command. */ | |
2281 | if (character == '<' || character == '>') | |
ccc6cda3 | 2282 | parser_state &= ~PST_ALEXPNEXT; |
726f6388 JA |
2283 | #endif /* ALIAS */ |
2284 | ||
ccc6cda3 JA |
2285 | peek_char = shell_getc (1); |
2286 | if (character == peek_char) | |
726f6388 JA |
2287 | { |
2288 | switch (character) | |
2289 | { | |
ccc6cda3 | 2290 | case '<': |
726f6388 JA |
2291 | /* If '<' then we could be at "<<" or at "<<-". We have to |
2292 | look ahead one more character. */ | |
726f6388 JA |
2293 | peek_char = shell_getc (1); |
2294 | if (peek_char == '-') | |
2295 | return (LESS_LESS_MINUS); | |
2296 | else | |
2297 | { | |
2298 | shell_ungetc (peek_char); | |
2299 | return (LESS_LESS); | |
2300 | } | |
2301 | ||
2302 | case '>': | |
2303 | return (GREATER_GREATER); | |
2304 | ||
2305 | case ';': | |
ccc6cda3 | 2306 | parser_state |= PST_CASEPAT; |
726f6388 | 2307 | #if defined (ALIAS) |
ccc6cda3 | 2308 | parser_state &= ~PST_ALEXPNEXT; |
726f6388 JA |
2309 | #endif /* ALIAS */ |
2310 | return (SEMI_SEMI); | |
2311 | ||
2312 | case '&': | |
2313 | return (AND_AND); | |
2314 | ||
2315 | case '|': | |
2316 | return (OR_OR); | |
ccc6cda3 | 2317 | |
bb70624e | 2318 | #if defined (DPAREN_ARITHMETIC) || defined (ARITH_FOR_COMMAND) |
ccc6cda3 | 2319 | case '(': /* ) */ |
bb70624e JA |
2320 | # if defined (ARITH_FOR_COMMAND) |
2321 | if (last_read_token == FOR) | |
2322 | { | |
2323 | int cmdtyp, len; | |
2324 | char *wval, *wv2; | |
2325 | WORD_DESC *wd; | |
2326 | ||
2327 | arith_for_lineno = line_number; | |
2328 | cmdtyp = parse_arith_cmd (&wval); | |
2329 | if (cmdtyp == 1) | |
2330 | { | |
2331 | /* parse_arith_cmd adds quotes at the beginning and end | |
28ef6c31 | 2332 | of the string it returns; we need to take those out. */ |
bb70624e JA |
2333 | len = strlen (wval); |
2334 | wv2 = xmalloc (len); | |
2335 | strncpy (wv2, wval + 1, len - 2); | |
2336 | wv2[len - 2] = '\0'; | |
2337 | wd = make_word (wv2); | |
2338 | yylval.word_list = make_word_list (wd, (WORD_LIST *)NULL); | |
2339 | free (wval); | |
2340 | free (wv2); | |
2341 | return (ARITH_FOR_EXPRS); | |
2342 | } | |
2343 | else | |
2344 | return -1; /* ERROR */ | |
2345 | } | |
2346 | # endif | |
2347 | # if defined (DPAREN_ARITHMETIC) | |
ccc6cda3 | 2348 | if (reserved_word_acceptable (last_read_token)) |
726f6388 | 2349 | { |
d166f048 JA |
2350 | int cmdtyp, sline; |
2351 | char *wval; | |
cce855bc | 2352 | WORD_DESC *wd; |
d166f048 JA |
2353 | |
2354 | sline = line_number; | |
2355 | cmdtyp = parse_arith_cmd (&wval); | |
2356 | if (cmdtyp == 1) /* arithmetic command */ | |
2357 | { | |
cce855bc JA |
2358 | wd = make_word (wval); |
2359 | wd->flags = W_QUOTED; | |
2360 | yylval.word_list = make_word_list (wd, (WORD_LIST *)NULL); | |
2361 | free (wval); /* make_word copies it */ | |
2362 | return (ARITH_CMD); | |
d166f048 JA |
2363 | } |
2364 | else if (cmdtyp == 0) /* nested subshell */ | |
2365 | { | |
2366 | push_string (wval, 0, (alias_t *)NULL); | |
2367 | if ((parser_state & PST_CASEPAT) == 0) | |
2368 | parser_state |= PST_SUBSHELL; | |
2369 | return (character); | |
2370 | } | |
2371 | else /* ERROR */ | |
2372 | return -1; | |
726f6388 | 2373 | } |
ccc6cda3 | 2374 | break; |
bb70624e | 2375 | # endif |
ccc6cda3 | 2376 | #endif |
726f6388 | 2377 | } |
726f6388 | 2378 | } |
ccc6cda3 JA |
2379 | else if (character == '<' && peek_char == '&') |
2380 | return (LESS_AND); | |
2381 | else if (character == '>' && peek_char == '&') | |
2382 | return (GREATER_AND); | |
2383 | else if (character == '<' && peek_char == '>') | |
2384 | return (LESS_GREATER); | |
2385 | else if (character == '>' && peek_char == '|') | |
2386 | return (GREATER_BAR); | |
2387 | else if (peek_char == '>' && character == '&') | |
2388 | return (AND_GREATER); | |
2389 | ||
726f6388 JA |
2390 | shell_ungetc (peek_char); |
2391 | ||
2392 | /* If we look like we are reading the start of a function | |
2393 | definition, then let the reader know about it so that | |
2394 | we will do the right thing with `{'. */ | |
ccc6cda3 | 2395 | if (character == ')' && last_read_token == '(' && token_before_that == WORD) |
726f6388 | 2396 | { |
ccc6cda3 | 2397 | parser_state |= PST_ALLOWOPNBRC; |
726f6388 | 2398 | #if defined (ALIAS) |
ccc6cda3 | 2399 | parser_state &= ~PST_ALEXPNEXT; |
726f6388 | 2400 | #endif /* ALIAS */ |
ccc6cda3 | 2401 | function_dstart = line_number; |
726f6388 JA |
2402 | } |
2403 | ||
ccc6cda3 JA |
2404 | /* case pattern lists may be preceded by an optional left paren. If |
2405 | we're not trying to parse a case pattern list, the left paren | |
2406 | indicates a subshell. */ | |
2407 | if (character == '(' && (parser_state & PST_CASEPAT) == 0) /* ) */ | |
2408 | parser_state |= PST_SUBSHELL; | |
2409 | /*(*/ | |
2410 | else if ((parser_state & PST_CASEPAT) && character == ')') | |
28ef6c31 | 2411 | parser_state &= ~PST_CASEPAT; |
ccc6cda3 JA |
2412 | /*(*/ |
2413 | else if ((parser_state & PST_SUBSHELL) && character == ')') | |
2414 | parser_state &= ~PST_SUBSHELL; | |
726f6388 JA |
2415 | |
2416 | #if defined (PROCESS_SUBSTITUTION) | |
2417 | /* Check for the constructs which introduce process substitution. | |
2418 | Shells running in `posix mode' don't do process substitution. */ | |
2419 | if (posixly_correct || | |
ccc6cda3 | 2420 | ((character != '>' && character != '<') || peek_char != '(')) |
726f6388 JA |
2421 | #endif /* PROCESS_SUBSTITUTION */ |
2422 | return (character); | |
2423 | } | |
2424 | ||
2425 | /* Hack <&- (close stdin) case. */ | |
ccc6cda3 JA |
2426 | if (character == '-' && (last_read_token == LESS_AND || last_read_token == GREATER_AND)) |
2427 | return (character); | |
2428 | ||
726f6388 JA |
2429 | /* Okay, if we got this far, we have to read a word. Read one, |
2430 | and then check it against the known ones. */ | |
ccc6cda3 JA |
2431 | result = read_token_word (character); |
2432 | #if defined (ALIAS) | |
2433 | if (result == RE_READ_TOKEN) | |
2434 | goto re_read_token; | |
2435 | #endif | |
2436 | return result; | |
2437 | } | |
726f6388 | 2438 | |
ccc6cda3 JA |
2439 | /* Match a $(...) or other grouping construct. This has to handle embedded |
2440 | quoted strings ('', ``, "") and nested constructs. It also must handle | |
2441 | reprompting the user, if necessary, after reading a newline, and returning | |
2442 | correct error values if it reads EOF. */ | |
b72432fd JA |
2443 | |
2444 | #define P_FIRSTCLOSE 0x01 | |
bb70624e | 2445 | #define P_ALLOWESC 0x02 |
b72432fd | 2446 | |
ccc6cda3 JA |
2447 | static char matched_pair_error; |
2448 | static char * | |
2449 | parse_matched_pair (qc, open, close, lenp, flags) | |
2450 | int qc; /* `"' if this construct is within double quotes */ | |
2451 | int open, close; | |
2452 | int *lenp, flags; | |
2453 | { | |
2454 | int count, ch, was_dollar; | |
28ef6c31 JA |
2455 | int pass_next_character, nestlen, ttranslen, start_lineno; |
2456 | char *ret, *nestret, *ttrans; | |
ccc6cda3 | 2457 | int retind, retsize; |
726f6388 | 2458 | |
ccc6cda3 JA |
2459 | count = 1; |
2460 | pass_next_character = was_dollar = 0; | |
726f6388 | 2461 | |
ccc6cda3 JA |
2462 | ret = xmalloc (retsize = 64); |
2463 | retind = 0; | |
726f6388 | 2464 | |
ccc6cda3 JA |
2465 | start_lineno = line_number; |
2466 | while (count) | |
2467 | { | |
bb70624e | 2468 | ch = shell_getc ((qc != '\'' || (flags & P_ALLOWESC)) && pass_next_character == 0); |
ccc6cda3 JA |
2469 | if (ch == EOF) |
2470 | { | |
2471 | free (ret); | |
2472 | parser_error (start_lineno, "unexpected EOF while looking for matching `%c'", close); | |
2473 | EOF_Reached = 1; /* XXX */ | |
2474 | return (&matched_pair_error); | |
2475 | } | |
726f6388 | 2476 | |
ccc6cda3 JA |
2477 | /* Possible reprompting. */ |
2478 | if (ch == '\n' && interactive && | |
2479 | (bash_input.type == st_stdin || bash_input.type == st_stream)) | |
2480 | prompt_again (); | |
726f6388 | 2481 | |
ccc6cda3 JA |
2482 | if (pass_next_character) /* last char was backslash */ |
2483 | { | |
2484 | pass_next_character = 0; | |
2485 | if (qc != '\'' && ch == '\n') /* double-quoted \<newline> disappears. */ | |
2486 | { | |
2487 | if (retind > 0) retind--; /* swallow previously-added backslash */ | |
2488 | continue; | |
2489 | } | |
726f6388 | 2490 | |
ccc6cda3 JA |
2491 | RESIZE_MALLOCED_BUFFER (ret, retind, 2, retsize, 64); |
2492 | if (ch == CTLESC || ch == CTLNUL) | |
2493 | ret[retind++] = CTLESC; | |
2494 | ret[retind++] = ch; | |
2495 | continue; | |
2496 | } | |
2497 | else if (ch == CTLESC || ch == CTLNUL) /* special shell escapes */ | |
2498 | { | |
2499 | RESIZE_MALLOCED_BUFFER (ret, retind, 2, retsize, 64); | |
2500 | ret[retind++] = CTLESC; | |
2501 | ret[retind++] = ch; | |
2502 | continue; | |
2503 | } | |
2504 | else if (ch == close) /* ending delimiter */ | |
2505 | count--; | |
bb70624e JA |
2506 | #if 1 |
2507 | /* handle nested ${...} specially. */ | |
2508 | else if (open != close && was_dollar && open == '{' && ch == open) /* } */ | |
28ef6c31 | 2509 | count++; |
bb70624e | 2510 | #endif |
b72432fd | 2511 | else if (((flags & P_FIRSTCLOSE) == 0) && ch == open) /* nested begin */ |
ccc6cda3 | 2512 | count++; |
726f6388 | 2513 | |
ccc6cda3 JA |
2514 | /* Add this character. */ |
2515 | RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64); | |
2516 | ret[retind++] = ch; | |
726f6388 | 2517 | |
ccc6cda3 | 2518 | if (open == '\'') /* '' inside grouping construct */ |
bb70624e JA |
2519 | { |
2520 | if ((flags & P_ALLOWESC) && ch == '\\') | |
2521 | pass_next_character++; | |
2522 | continue; | |
2523 | } | |
726f6388 | 2524 | |
ccc6cda3 JA |
2525 | if (ch == '\\') /* backslashes */ |
2526 | pass_next_character++; | |
726f6388 | 2527 | |
ccc6cda3 JA |
2528 | if (open != close) /* a grouping construct */ |
2529 | { | |
2530 | if (shellquote (ch)) | |
2531 | { | |
2532 | /* '', ``, or "" inside $(...) or other grouping construct. */ | |
2533 | push_delimiter (dstack, ch); | |
28ef6c31 JA |
2534 | if (was_dollar && ch == '\'') /* $'...' inside group */ |
2535 | nestret = parse_matched_pair (ch, ch, ch, &nestlen, P_ALLOWESC); | |
2536 | else | |
2537 | nestret = parse_matched_pair (ch, ch, ch, &nestlen, 0); | |
ccc6cda3 JA |
2538 | pop_delimiter (dstack); |
2539 | if (nestret == &matched_pair_error) | |
2540 | { | |
2541 | free (ret); | |
2542 | return &matched_pair_error; | |
2543 | } | |
28ef6c31 JA |
2544 | if (was_dollar && ch == '\'') |
2545 | { | |
2546 | /* Translate $'...' here. */ | |
2547 | ttrans = ansiexpand (nestret, 0, nestlen - 1, &ttranslen); | |
2548 | free (nestret); | |
2549 | nestret = sh_single_quote (ttrans); | |
2550 | free (ttrans); | |
2551 | nestlen = strlen (nestret); | |
2552 | retind -= 2; /* back up before the $' */ | |
2553 | } | |
2554 | else if (was_dollar && ch == '"') | |
2555 | { | |
2556 | /* Locale expand $"..." here. */ | |
2557 | ttrans = localeexpand (nestret, 0, nestlen - 1, start_lineno, &ttranslen); | |
2558 | free (nestret); | |
2559 | nestret = xmalloc (ttranslen + 3); | |
2560 | nestret[0] = '"'; | |
2561 | strcpy (nestret + 1, ttrans); | |
2562 | nestret[ttranslen + 1] = '"'; | |
2563 | nestret[ttranslen += 2] = '\0'; | |
2564 | free (ttrans); | |
2565 | nestlen = ttranslen; | |
2566 | retind -= 2; /* back up before the $" */ | |
2567 | } | |
ccc6cda3 JA |
2568 | if (nestlen) |
2569 | { | |
2570 | RESIZE_MALLOCED_BUFFER (ret, retind, nestlen, retsize, 64); | |
2571 | strcpy (ret + retind, nestret); | |
2572 | retind += nestlen; | |
2573 | } | |
2574 | FREE (nestret); | |
2575 | } | |
2576 | } | |
2577 | /* Parse an old-style command substitution within double quotes as a | |
2578 | single word. */ | |
2579 | /* XXX - sh and ksh93 don't do this - XXX */ | |
2580 | else if (open == '"' && ch == '`') | |
2581 | { | |
2582 | nestret = parse_matched_pair (0, '`', '`', &nestlen, 0); | |
2583 | if (nestret == &matched_pair_error) | |
2584 | { | |
2585 | free (ret); | |
2586 | return &matched_pair_error; | |
2587 | } | |
2588 | if (nestlen) | |
2589 | { | |
2590 | RESIZE_MALLOCED_BUFFER (ret, retind, nestlen, retsize, 64); | |
2591 | strcpy (ret + retind, nestret); | |
2592 | retind += nestlen; | |
2593 | } | |
2594 | FREE (nestret); | |
2595 | } | |
2596 | else if (was_dollar && (ch == '(' || ch == '{' || ch == '[')) /* ) } ] */ | |
2597 | /* check for $(), $[], or ${} inside quoted string. */ | |
2598 | { | |
2599 | if (open == ch) /* undo previous increment */ | |
2600 | count--; | |
2601 | if (ch == '(') /* ) */ | |
2602 | nestret = parse_matched_pair (0, '(', ')', &nestlen, 0); | |
2603 | else if (ch == '{') /* } */ | |
b72432fd | 2604 | nestret = parse_matched_pair (0, '{', '}', &nestlen, P_FIRSTCLOSE); |
ccc6cda3 JA |
2605 | else if (ch == '[') /* ] */ |
2606 | nestret = parse_matched_pair (0, '[', ']', &nestlen, 0); | |
2607 | if (nestret == &matched_pair_error) | |
2608 | { | |
2609 | free (ret); | |
2610 | return &matched_pair_error; | |
2611 | } | |
2612 | if (nestlen) | |
2613 | { | |
2614 | RESIZE_MALLOCED_BUFFER (ret, retind, nestlen, retsize, 64); | |
2615 | strcpy (ret + retind, nestret); | |
2616 | retind += nestlen; | |
2617 | } | |
2618 | FREE (nestret); | |
2619 | } | |
2620 | was_dollar = (ch == '$'); | |
2621 | } | |
726f6388 | 2622 | |
ccc6cda3 JA |
2623 | ret[retind] = '\0'; |
2624 | if (lenp) | |
2625 | *lenp = retind; | |
2626 | return ret; | |
2627 | } | |
726f6388 | 2628 | |
bb70624e | 2629 | #if defined (DPAREN_ARITHMETIC) || defined (ARITH_FOR_COMMAND) |
d166f048 JA |
2630 | /* We've seen a `(('. Look for the matching `))'. If we get it, return 1. |
2631 | If not, assume it's a nested subshell for backwards compatibility and | |
2632 | return 0. In any case, put the characters we've consumed into a locally- | |
2633 | allocated buffer and make *ep point to that buffer. Return -1 on an | |
2634 | error, for example EOF. */ | |
2635 | static int | |
2636 | parse_arith_cmd (ep) | |
2637 | char **ep; | |
2638 | { | |
2639 | int exp_lineno, rval, c; | |
2640 | char *ttok, *token; | |
2641 | int ttoklen; | |
2642 | ||
2643 | exp_lineno = line_number; | |
2644 | ttok = parse_matched_pair (0, '(', ')', &ttoklen, 0); | |
2645 | rval = 1; | |
2646 | if (ttok == &matched_pair_error) | |
2647 | return -1; | |
2648 | /* Check that the next character is the closing right paren. If | |
2649 | not, this is a syntax error. ( */ | |
2650 | if ((c = shell_getc (0)) != ')') | |
2651 | rval = 0; | |
2652 | ||
bb70624e | 2653 | token = xmalloc (ttoklen + 4); |
d166f048 JA |
2654 | |
2655 | /* (( ... )) -> "..." */ | |
2656 | token[0] = (rval == 1) ? '"' : '('; | |
2657 | strncpy (token + 1, ttok, ttoklen - 1); /* don't copy the final `)' */ | |
2658 | if (rval == 1) | |
2659 | { | |
2660 | token[ttoklen] = '"'; | |
2661 | token[ttoklen+1] = '\0'; | |
2662 | } | |
2663 | else | |
2664 | { | |
2665 | token[ttoklen] = ')'; | |
2666 | token[ttoklen+1] = c; | |
2667 | token[ttoklen+2] = '\0'; | |
2668 | } | |
2669 | *ep = token; | |
2670 | FREE (ttok); | |
2671 | return rval; | |
2672 | } | |
bb70624e | 2673 | #endif /* DPAREN_ARITHMETIC || ARITH_FOR_COMMAND */ |
d166f048 | 2674 | |
cce855bc JA |
2675 | #if defined (COND_COMMAND) |
2676 | static COND_COM *cond_term (); | |
2677 | static COND_COM *cond_and (); | |
2678 | static COND_COM *cond_or (); | |
2679 | static COND_COM *cond_expr (); | |
2680 | ||
2681 | static COND_COM * | |
2682 | cond_expr () | |
2683 | { | |
2684 | return (cond_or ()); | |
2685 | } | |
2686 | ||
2687 | static COND_COM * | |
2688 | cond_or () | |
2689 | { | |
2690 | COND_COM *l, *r; | |
2691 | ||
2692 | l = cond_and (); | |
2693 | if (cond_token == OR_OR) | |
2694 | { | |
2695 | r = cond_or (); | |
2696 | l = make_cond_node (COND_OR, (WORD_DESC *)NULL, l, r); | |
2697 | } | |
2698 | return l; | |
2699 | } | |
2700 | ||
2701 | static COND_COM * | |
2702 | cond_and () | |
2703 | { | |
2704 | COND_COM *l, *r; | |
2705 | ||
2706 | l = cond_term (); | |
2707 | if (cond_token == AND_AND) | |
2708 | { | |
2709 | r = cond_and (); | |
2710 | l = make_cond_node (COND_AND, (WORD_DESC *)NULL, l, r); | |
2711 | } | |
2712 | return l; | |
2713 | } | |
2714 | ||
2715 | static int | |
2716 | cond_skip_newlines () | |
2717 | { | |
2718 | while ((cond_token = read_token (READ)) == '\n') | |
2719 | { | |
2720 | if (interactive && (bash_input.type == st_stdin || bash_input.type == st_stream)) | |
2721 | prompt_again (); | |
2722 | } | |
2723 | return (cond_token); | |
2724 | } | |
2725 | ||
2726 | #define COND_RETURN_ERROR() \ | |
2727 | do { cond_token = COND_ERROR; return ((COND_COM *)NULL); } while (0) | |
2728 | ||
2729 | static COND_COM * | |
2730 | cond_term () | |
2731 | { | |
2732 | WORD_DESC *op; | |
2733 | COND_COM *term, *tleft, *tright; | |
2734 | int tok, lineno; | |
2735 | ||
2736 | /* Read a token. It can be a left paren, a `!', a unary operator, or a | |
2737 | word that should be the first argument of a binary operator. Start by | |
2738 | skipping newlines, since this is a compound command. */ | |
2739 | tok = cond_skip_newlines (); | |
2740 | lineno = line_number; | |
2741 | if (tok == COND_END) | |
2742 | { | |
2743 | COND_RETURN_ERROR (); | |
2744 | } | |
2745 | else if (tok == '(') | |
2746 | { | |
2747 | term = cond_expr (); | |
2748 | if (cond_token != ')') | |
2749 | { | |
2750 | if (term) | |
2751 | dispose_cond_node (term); /* ( */ | |
2752 | parser_error (lineno, "expected `)'"); | |
2753 | COND_RETURN_ERROR (); | |
2754 | } | |
2755 | term = make_cond_node (COND_EXPR, (WORD_DESC *)NULL, term, (COND_COM *)NULL); | |
2756 | (void)cond_skip_newlines (); | |
2757 | } | |
2758 | else if (tok == BANG || (tok == WORD && (yylval.word->word[0] == '!' && yylval.word->word[1] == '\0'))) | |
2759 | { | |
2760 | if (tok == WORD) | |
2761 | dispose_word (yylval.word); /* not needed */ | |
2762 | term = cond_term (); | |
2763 | if (term) | |
2764 | term->flags |= CMD_INVERT_RETURN; | |
2765 | } | |
2766 | else if (tok == WORD && test_unop (yylval.word->word)) | |
2767 | { | |
2768 | op = yylval.word; | |
2769 | tok = read_token (READ); | |
2770 | if (tok == WORD) | |
2771 | { | |
2772 | tleft = make_cond_node (COND_TERM, yylval.word, (COND_COM *)NULL, (COND_COM *)NULL); | |
2773 | term = make_cond_node (COND_UNARY, op, tleft, (COND_COM *)NULL); | |
2774 | } | |
2775 | else | |
2776 | { | |
2777 | dispose_word (op); | |
2778 | parser_error (line_number, "unexpected argument to conditional unary operator"); | |
2779 | COND_RETURN_ERROR (); | |
2780 | } | |
2781 | ||
2782 | (void)cond_skip_newlines (); | |
2783 | } | |
bb70624e | 2784 | else if (tok == WORD) /* left argument to binary operator */ |
cce855bc JA |
2785 | { |
2786 | /* lhs */ | |
2787 | tleft = make_cond_node (COND_TERM, yylval.word, (COND_COM *)NULL, (COND_COM *)NULL); | |
2788 | ||
2789 | /* binop */ | |
2790 | tok = read_token (READ); | |
2791 | if (tok == WORD && test_binop (yylval.word->word)) | |
28ef6c31 | 2792 | op = yylval.word; |
cce855bc | 2793 | else if (tok == '<' || tok == '>') |
28ef6c31 JA |
2794 | op = make_word_from_token (tok); /* ( */ |
2795 | /* There should be a check before blindly accepting the `)' that we have | |
2796 | seen the opening `('. */ | |
2797 | else if (tok == COND_END || tok == AND_AND || tok == OR_OR || tok == ')') | |
cce855bc JA |
2798 | { |
2799 | /* Special case. [[ x ]] is equivalent to [[ -n x ]], just like | |
2800 | the test command. Similarly for [[ x && expr ]] or | |
28ef6c31 | 2801 | [[ x || expr ]] or [[ (x) ]]. */ |
cce855bc JA |
2802 | op = make_word ("-n"); |
2803 | term = make_cond_node (COND_UNARY, op, tleft, (COND_COM *)NULL); | |
2804 | cond_token = tok; | |
2805 | return (term); | |
2806 | } | |
2807 | else | |
2808 | { | |
2809 | parser_error (line_number, "conditional binary operator expected"); | |
2810 | dispose_cond_node (tleft); | |
2811 | COND_RETURN_ERROR (); | |
2812 | } | |
2813 | ||
2814 | /* rhs */ | |
2815 | tok = read_token (READ); | |
2816 | if (tok == WORD) | |
2817 | { | |
2818 | tright = make_cond_node (COND_TERM, yylval.word, (COND_COM *)NULL, (COND_COM *)NULL); | |
2819 | term = make_cond_node (COND_BINARY, op, tleft, tright); | |
2820 | } | |
2821 | else | |
2822 | { | |
2823 | parser_error (line_number, "unexpected argument to conditional binary operator"); | |
2824 | dispose_cond_node (tleft); | |
2825 | dispose_word (op); | |
2826 | COND_RETURN_ERROR (); | |
2827 | } | |
2828 | ||
2829 | (void)cond_skip_newlines (); | |
2830 | } | |
bb70624e JA |
2831 | else |
2832 | { | |
2833 | if (tok < 256) | |
2834 | parser_error (line_number, "unexpected token `%c' in conditional command", tok); | |
2835 | else | |
2836 | parser_error (line_number, "unexpected token %d in conditional command", tok); | |
2837 | COND_RETURN_ERROR (); | |
2838 | } | |
cce855bc JA |
2839 | return (term); |
2840 | } | |
2841 | ||
2842 | /* This is kind of bogus -- we slip a mini recursive-descent parser in | |
2843 | here to handle the conditional statement syntax. */ | |
2844 | static COMMAND * | |
2845 | parse_cond_command () | |
2846 | { | |
2847 | COND_COM *cexp; | |
2848 | ||
2849 | cexp = cond_expr (); | |
2850 | return (make_cond_command (cexp)); | |
2851 | } | |
2852 | #endif | |
2853 | ||
ccc6cda3 JA |
2854 | static int |
2855 | read_token_word (character) | |
2856 | int character; | |
2857 | { | |
2858 | /* The value for YYLVAL when a WORD is read. */ | |
2859 | WORD_DESC *the_word; | |
726f6388 | 2860 | |
ccc6cda3 JA |
2861 | /* Index into the token that we are building. */ |
2862 | int token_index; | |
726f6388 | 2863 | |
ccc6cda3 JA |
2864 | /* ALL_DIGITS becomes zero when we see a non-digit. */ |
2865 | int all_digits; | |
726f6388 | 2866 | |
ccc6cda3 JA |
2867 | /* DOLLAR_PRESENT becomes non-zero if we see a `$'. */ |
2868 | int dollar_present; | |
726f6388 | 2869 | |
ccc6cda3 JA |
2870 | /* QUOTED becomes non-zero if we see one of ("), ('), (`), or (\). */ |
2871 | int quoted; | |
726f6388 | 2872 | |
ccc6cda3 JA |
2873 | /* Non-zero means to ignore the value of the next character, and just |
2874 | to add it no matter what. */ | |
2875 | int pass_next_character; | |
726f6388 | 2876 | |
ccc6cda3 JA |
2877 | /* The current delimiting character. */ |
2878 | int cd; | |
2879 | int result, peek_char; | |
2880 | char *ttok, *ttrans; | |
2881 | int ttoklen, ttranslen; | |
726f6388 | 2882 | |
d166f048 JA |
2883 | if (token_buffer_size < TOKEN_DEFAULT_INITIAL_SIZE) |
2884 | token = xrealloc (token, token_buffer_size = TOKEN_DEFAULT_INITIAL_SIZE); | |
726f6388 | 2885 | |
ccc6cda3 | 2886 | token_index = 0; |
28ef6c31 | 2887 | all_digits = isdigit (character); |
ccc6cda3 | 2888 | dollar_present = quoted = pass_next_character = 0; |
726f6388 | 2889 | |
ccc6cda3 JA |
2890 | for (;;) |
2891 | { | |
2892 | if (character == EOF) | |
2893 | goto got_token; | |
726f6388 | 2894 | |
ccc6cda3 JA |
2895 | if (pass_next_character) |
2896 | { | |
2897 | pass_next_character = 0; | |
2898 | goto got_character; | |
2899 | } | |
726f6388 | 2900 | |
ccc6cda3 | 2901 | cd = current_delimiter (dstack); |
726f6388 | 2902 | |
ccc6cda3 JA |
2903 | /* Handle backslashes. Quote lots of things when not inside of |
2904 | double-quotes, quote some things inside of double-quotes. */ | |
2905 | if (character == '\\') | |
2906 | { | |
2907 | peek_char = shell_getc (0); | |
726f6388 | 2908 | |
ccc6cda3 JA |
2909 | /* Backslash-newline is ignored in all cases except |
2910 | when quoted with single quotes. */ | |
2911 | if (peek_char == '\n') | |
2912 | { | |
2913 | character = '\n'; | |
2914 | goto next_character; | |
2915 | } | |
2916 | else | |
2917 | { | |
2918 | shell_ungetc (peek_char); | |
726f6388 | 2919 | |
ccc6cda3 JA |
2920 | /* If the next character is to be quoted, note it now. */ |
2921 | if (cd == 0 || cd == '`' || | |
28ef6c31 | 2922 | (cd == '"' && (sh_syntaxtab[peek_char] & CBSDQUOTE))) |
ccc6cda3 | 2923 | pass_next_character++; |
726f6388 | 2924 | |
ccc6cda3 JA |
2925 | quoted = 1; |
2926 | goto got_character; | |
2927 | } | |
2928 | } | |
726f6388 | 2929 | |
ccc6cda3 JA |
2930 | /* Parse a matched pair of quote characters. */ |
2931 | if (shellquote (character)) | |
2932 | { | |
2933 | push_delimiter (dstack, character); | |
2934 | ttok = parse_matched_pair (character, character, character, &ttoklen, 0); | |
2935 | pop_delimiter (dstack); | |
2936 | if (ttok == &matched_pair_error) | |
2937 | return -1; /* Bail immediately. */ | |
2938 | RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 2, | |
2939 | token_buffer_size, TOKEN_DEFAULT_GROW_SIZE); | |
2940 | token[token_index++] = character; | |
2941 | strcpy (token + token_index, ttok); | |
2942 | token_index += ttoklen; | |
2943 | all_digits = 0; | |
2944 | quoted = 1; | |
2945 | dollar_present |= (character == '"' && strchr (ttok, '$') != 0); | |
2946 | FREE (ttok); | |
2947 | goto next_character; | |
2948 | } | |
726f6388 | 2949 | |
cce855bc JA |
2950 | #ifdef EXTENDED_GLOB |
2951 | /* Parse a ksh-style extended pattern matching specification. */ | |
28ef6c31 | 2952 | if (extended_glob && PATTERN_CHAR (character)) |
cce855bc JA |
2953 | { |
2954 | peek_char = shell_getc (1); | |
2955 | if (peek_char == '(') /* ) */ | |
2956 | { | |
2957 | push_delimiter (dstack, peek_char); | |
2958 | ttok = parse_matched_pair (cd, '(', ')', &ttoklen, 0); | |
2959 | pop_delimiter (dstack); | |
2960 | if (ttok == &matched_pair_error) | |
2961 | return -1; /* Bail immediately. */ | |
2962 | RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 2, | |
2963 | token_buffer_size, | |
2964 | TOKEN_DEFAULT_GROW_SIZE); | |
2965 | token[token_index++] = character; | |
2966 | token[token_index++] = peek_char; | |
2967 | strcpy (token + token_index, ttok); | |
2968 | token_index += ttoklen; | |
2969 | FREE (ttok); | |
2970 | dollar_present = all_digits = 0; | |
2971 | goto next_character; | |
2972 | } | |
2973 | else | |
2974 | shell_ungetc (peek_char); | |
2975 | } | |
2976 | #endif /* EXTENDED_GLOB */ | |
2977 | ||
ccc6cda3 JA |
2978 | /* If the delimiter character is not single quote, parse some of |
2979 | the shell expansions that must be read as a single word. */ | |
28ef6c31 | 2980 | if (shellexp (character)) |
ccc6cda3 JA |
2981 | { |
2982 | peek_char = shell_getc (1); | |
2983 | /* $(...), <(...), >(...), $((...)), ${...}, and $[...] constructs */ | |
2984 | if (peek_char == '(' || | |
2985 | ((peek_char == '{' || peek_char == '[') && character == '$')) /* ) ] } */ | |
2986 | { | |
2987 | if (peek_char == '{') /* } */ | |
28ef6c31 | 2988 | ttok = parse_matched_pair (cd, '{', '}', &ttoklen, P_FIRSTCLOSE); |
ccc6cda3 | 2989 | else if (peek_char == '(') /* ) */ |
d166f048 JA |
2990 | { |
2991 | /* XXX - push and pop the `(' as a delimiter for use by | |
2992 | the command-oriented-history code. This way newlines | |
2993 | appearing in the $(...) string get added to the | |
2994 | history literally rather than causing a possibly- | |
bb70624e | 2995 | incorrect `;' to be added. ) */ |
d166f048 JA |
2996 | push_delimiter (dstack, peek_char); |
2997 | ttok = parse_matched_pair (cd, '(', ')', &ttoklen, 0); | |
2998 | pop_delimiter (dstack); | |
2999 | } | |
ccc6cda3 JA |
3000 | else |
3001 | ttok = parse_matched_pair (cd, '[', ']', &ttoklen, 0); | |
3002 | if (ttok == &matched_pair_error) | |
3003 | return -1; /* Bail immediately. */ | |
3004 | RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 2, | |
3005 | token_buffer_size, | |
3006 | TOKEN_DEFAULT_GROW_SIZE); | |
3007 | token[token_index++] = character; | |
3008 | token[token_index++] = peek_char; | |
3009 | strcpy (token + token_index, ttok); | |
3010 | token_index += ttoklen; | |
3011 | FREE (ttok); | |
3012 | dollar_present = 1; | |
3013 | all_digits = 0; | |
3014 | goto next_character; | |
3015 | } | |
3016 | /* This handles $'...' and $"..." new-style quoted strings. */ | |
3017 | else if (character == '$' && (peek_char == '\'' || peek_char == '"')) | |
3018 | { | |
cce855bc JA |
3019 | int first_line; |
3020 | ||
3021 | first_line = line_number; | |
bb70624e JA |
3022 | push_delimiter (dstack, peek_char); |
3023 | ttok = parse_matched_pair (peek_char, peek_char, peek_char, | |
3024 | &ttoklen, | |
3025 | (peek_char == '\'') ? P_ALLOWESC : 0); | |
3026 | pop_delimiter (dstack); | |
ccc6cda3 JA |
3027 | if (ttok == &matched_pair_error) |
3028 | return -1; | |
3029 | if (peek_char == '\'') | |
bb70624e JA |
3030 | { |
3031 | ttrans = ansiexpand (ttok, 0, ttoklen - 1, &ttranslen); | |
3032 | free (ttok); | |
3033 | /* Insert the single quotes and correctly quote any | |
3034 | embedded single quotes (allowed because P_ALLOWESC was | |
3035 | passed to parse_matched_pair). */ | |
28ef6c31 | 3036 | ttok = sh_single_quote (ttrans); |
bb70624e JA |
3037 | free (ttrans); |
3038 | ttrans = ttok; | |
3039 | ttranslen = strlen (ttrans); | |
3040 | } | |
ccc6cda3 | 3041 | else |
bb70624e JA |
3042 | { |
3043 | /* Try to locale-expand the converted string. */ | |
3044 | ttrans = localeexpand (ttok, 0, ttoklen - 1, first_line, &ttranslen); | |
3045 | free (ttok); | |
3046 | ||
3047 | /* Add the double quotes back */ | |
3048 | ttok = xmalloc (ttranslen + 3); | |
3049 | ttok[0] = '"'; | |
3050 | strcpy (ttok + 1, ttrans); | |
3051 | ttok[ttranslen + 1] = '"'; | |
3052 | ttok[ttranslen += 2] = '\0'; | |
3053 | free (ttrans); | |
3054 | ttrans = ttok; | |
3055 | } | |
3056 | ||
ccc6cda3 JA |
3057 | RESIZE_MALLOCED_BUFFER (token, token_index, ttranslen + 2, |
3058 | token_buffer_size, | |
3059 | TOKEN_DEFAULT_GROW_SIZE); | |
ccc6cda3 JA |
3060 | strcpy (token + token_index, ttrans); |
3061 | token_index += ttranslen; | |
ccc6cda3 JA |
3062 | FREE (ttrans); |
3063 | quoted = 1; | |
3064 | all_digits = 0; | |
3065 | goto next_character; | |
3066 | } | |
b72432fd JA |
3067 | /* This could eventually be extended to recognize all of the |
3068 | shell's single-character parameter expansions, and set flags.*/ | |
3069 | else if (character == '$' && peek_char == '$') | |
3070 | { | |
3071 | ttok = xmalloc (3); | |
3072 | ttok[0] = ttok[1] = '$'; | |
3073 | ttok[2] = '\0'; | |
3074 | RESIZE_MALLOCED_BUFFER (token, token_index, 3, | |
3075 | token_buffer_size, | |
3076 | TOKEN_DEFAULT_GROW_SIZE); | |
3077 | strcpy (token + token_index, ttok); | |
3078 | token_index += 2; | |
3079 | dollar_present = 1; | |
3080 | all_digits = 0; | |
3081 | FREE (ttok); | |
3082 | goto next_character; | |
3083 | } | |
ccc6cda3 JA |
3084 | else |
3085 | shell_ungetc (peek_char); | |
3086 | } | |
726f6388 | 3087 | |
ccc6cda3 JA |
3088 | #if defined (ARRAY_VARS) |
3089 | /* Identify possible compound array variable assignment. */ | |
e8ce775d | 3090 | else if (character == '=' && token_index > 0) |
ccc6cda3 JA |
3091 | { |
3092 | peek_char = shell_getc (1); | |
3093 | if (peek_char == '(') /* ) */ | |
3094 | { | |
3095 | ttok = parse_matched_pair (cd, '(', ')', &ttoklen, 0); | |
3096 | if (ttok == &matched_pair_error) | |
3097 | return -1; /* Bail immediately. */ | |
b72432fd JA |
3098 | if (ttok[0] == '(') /* ) */ |
3099 | { | |
3100 | FREE (ttok); | |
3101 | return -1; | |
3102 | } | |
ccc6cda3 JA |
3103 | RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 2, |
3104 | token_buffer_size, | |
3105 | TOKEN_DEFAULT_GROW_SIZE); | |
3106 | token[token_index++] = character; | |
3107 | token[token_index++] = peek_char; | |
3108 | strcpy (token + token_index, ttok); | |
3109 | token_index += ttoklen; | |
3110 | FREE (ttok); | |
3111 | all_digits = 0; | |
3112 | goto next_character; | |
3113 | } | |
3114 | else | |
3115 | shell_ungetc (peek_char); | |
3116 | } | |
3117 | #endif | |
726f6388 | 3118 | |
ccc6cda3 JA |
3119 | /* When not parsing a multi-character word construct, shell meta- |
3120 | characters break words. */ | |
3121 | if (shellbreak (character)) | |
3122 | { | |
3123 | shell_ungetc (character); | |
3124 | goto got_token; | |
3125 | } | |
726f6388 | 3126 | |
ccc6cda3 | 3127 | got_character: |
726f6388 | 3128 | |
28ef6c31 | 3129 | all_digits &= isdigit (character); |
ccc6cda3 | 3130 | dollar_present |= character == '$'; |
726f6388 | 3131 | |
ccc6cda3 JA |
3132 | if (character == CTLESC || character == CTLNUL) |
3133 | token[token_index++] = CTLESC; | |
726f6388 | 3134 | |
ccc6cda3 | 3135 | token[token_index++] = character; |
726f6388 | 3136 | |
ccc6cda3 JA |
3137 | RESIZE_MALLOCED_BUFFER (token, token_index, 1, token_buffer_size, |
3138 | TOKEN_DEFAULT_GROW_SIZE); | |
726f6388 | 3139 | |
ccc6cda3 JA |
3140 | next_character: |
3141 | if (character == '\n' && interactive && | |
3142 | (bash_input.type == st_stdin || bash_input.type == st_stream)) | |
3143 | prompt_again (); | |
726f6388 | 3144 | |
ccc6cda3 JA |
3145 | /* We want to remove quoted newlines (that is, a \<newline> pair) |
3146 | unless we are within single quotes or pass_next_character is | |
3147 | set (the shell equivalent of literal-next). */ | |
3148 | cd = current_delimiter (dstack); | |
3149 | character = shell_getc (cd != '\'' && pass_next_character == 0); | |
3150 | } /* end for (;;) */ | |
726f6388 | 3151 | |
ccc6cda3 | 3152 | got_token: |
726f6388 | 3153 | |
ccc6cda3 | 3154 | token[token_index] = '\0'; |
726f6388 | 3155 | |
ccc6cda3 JA |
3156 | /* Check to see what thing we should return. If the last_read_token |
3157 | is a `<', or a `&', or the character which ended this token is | |
3158 | a '>' or '<', then, and ONLY then, is this input token a NUMBER. | |
3159 | Otherwise, it is just a word, and should be returned as such. */ | |
3160 | if (all_digits && (character == '<' || character == '>' || | |
3161 | last_read_token == LESS_AND || | |
3162 | last_read_token == GREATER_AND)) | |
726f6388 | 3163 | { |
ccc6cda3 JA |
3164 | yylval.number = atoi (token); |
3165 | return (NUMBER); | |
726f6388 JA |
3166 | } |
3167 | ||
ccc6cda3 JA |
3168 | /* Check for special case tokens. */ |
3169 | result = special_case_tokens (token); | |
3170 | if (result >= 0) | |
3171 | return result; | |
726f6388 JA |
3172 | |
3173 | #if defined (ALIAS) | |
ccc6cda3 JA |
3174 | /* Posix.2 does not allow reserved words to be aliased, so check for all |
3175 | of them, including special cases, before expanding the current token | |
3176 | as an alias. */ | |
3177 | if (posixly_correct) | |
3178 | CHECK_FOR_RESERVED_WORD (token); | |
3179 | ||
3180 | /* Aliases are expanded iff EXPAND_ALIASES is non-zero, and quoting | |
3181 | inhibits alias expansion. */ | |
3182 | if (expand_aliases && quoted == 0) | |
3183 | { | |
3184 | result = alias_expand_token (token); | |
3185 | if (result == RE_READ_TOKEN) | |
3186 | return (RE_READ_TOKEN); | |
3187 | else if (result == NO_EXPANSION) | |
3188 | parser_state &= ~PST_ALEXPNEXT; | |
3189 | } | |
726f6388 | 3190 | |
ccc6cda3 JA |
3191 | /* If not in Posix.2 mode, check for reserved words after alias |
3192 | expansion. */ | |
3193 | if (posixly_correct == 0) | |
3194 | #endif | |
3195 | CHECK_FOR_RESERVED_WORD (token); | |
3196 | ||
3197 | the_word = (WORD_DESC *)xmalloc (sizeof (WORD_DESC)); | |
3198 | the_word->word = xmalloc (1 + token_index); | |
3199 | the_word->flags = 0; | |
3200 | strcpy (the_word->word, token); | |
3201 | if (dollar_present) | |
3202 | the_word->flags |= W_HASDOLLAR; | |
3203 | if (quoted) | |
3204 | the_word->flags |= W_QUOTED; | |
3205 | /* A word is an assignment if it appears at the beginning of a | |
3206 | simple command, or after another assignment word. This is | |
3207 | context-dependent, so it cannot be handled in the grammar. */ | |
3208 | if (assignment (token)) | |
3209 | { | |
3210 | the_word->flags |= W_ASSIGNMENT; | |
3211 | /* Don't perform word splitting on assignment statements. */ | |
3212 | if (assignment_acceptable (last_read_token)) | |
3213 | the_word->flags |= W_NOSPLIT; | |
3214 | } | |
726f6388 | 3215 | |
ccc6cda3 | 3216 | yylval.word = the_word; |
726f6388 | 3217 | |
ccc6cda3 JA |
3218 | result = ((the_word->flags & (W_ASSIGNMENT|W_NOSPLIT)) == (W_ASSIGNMENT|W_NOSPLIT)) |
3219 | ? ASSIGNMENT_WORD : WORD; | |
726f6388 | 3220 | |
ccc6cda3 JA |
3221 | if (last_read_token == FUNCTION) |
3222 | { | |
3223 | parser_state |= PST_ALLOWOPNBRC; | |
3224 | function_dstart = line_number; | |
3225 | } | |
726f6388 | 3226 | |
ccc6cda3 JA |
3227 | return (result); |
3228 | } | |
726f6388 | 3229 | |
ccc6cda3 JA |
3230 | /* $'...' ANSI-C expand the portion of STRING between START and END and |
3231 | return the result. The result cannot be longer than the input string. */ | |
3232 | static char * | |
3233 | ansiexpand (string, start, end, lenp) | |
3234 | char *string; | |
3235 | int start, end, *lenp; | |
3236 | { | |
3237 | char *temp, *t; | |
3238 | int len, tlen; | |
726f6388 | 3239 | |
ccc6cda3 JA |
3240 | temp = xmalloc (end - start + 1); |
3241 | for (tlen = 0, len = start; len < end; ) | |
3242 | temp[tlen++] = string[len++]; | |
3243 | temp[tlen] = '\0'; | |
726f6388 | 3244 | |
ccc6cda3 JA |
3245 | if (*temp) |
3246 | { | |
bb70624e | 3247 | t = ansicstr (temp, tlen, 0, (int *)NULL, lenp); |
ccc6cda3 | 3248 | free (temp); |
ccc6cda3 JA |
3249 | return (t); |
3250 | } | |
3251 | else | |
3252 | { | |
3253 | if (lenp) | |
3254 | *lenp = 0; | |
3255 | return (temp); | |
3256 | } | |
3257 | } | |
726f6388 | 3258 | |
bb70624e JA |
3259 | /* Change a bash string into a string suitable for inclusion in a `po' file. |
3260 | This backslash-escapes `"' and `\' and changes newlines into \\\n"\n". */ | |
3261 | static char * | |
3262 | mk_msgstr (string, foundnlp) | |
3263 | char *string; | |
3264 | int *foundnlp; | |
3265 | { | |
3266 | register int c, len; | |
3267 | char *result, *r, *s; | |
3268 | ||
3269 | for (len = 0, s = string; s && *s; s++) | |
3270 | { | |
3271 | len++; | |
3272 | if (*s == '"' || *s == '\\') | |
3273 | len++; | |
3274 | else if (*s == '\n') | |
28ef6c31 | 3275 | len += 5; |
bb70624e JA |
3276 | } |
3277 | ||
3278 | r = result = xmalloc (len + 3); | |
3279 | *r++ = '"'; | |
3280 | ||
3281 | for (s = string; s && (c = *s); s++) | |
3282 | { | |
3283 | if (c == '\n') /* <NL> -> \n"<NL>" */ | |
3284 | { | |
3285 | *r++ = '\\'; | |
3286 | *r++ = 'n'; | |
3287 | *r++ = '"'; | |
3288 | *r++ = '\n'; | |
3289 | *r++ = '"'; | |
3290 | if (foundnlp) | |
3291 | *foundnlp = 1; | |
3292 | continue; | |
3293 | } | |
3294 | if (c == '"' || c == '\\') | |
3295 | *r++ = '\\'; | |
3296 | *r++ = c; | |
3297 | } | |
3298 | ||
3299 | *r++ = '"'; | |
3300 | *r++ = '\0'; | |
3301 | ||
3302 | return result; | |
3303 | } | |
3304 | ||
ccc6cda3 JA |
3305 | /* $"..." -- Translate the portion of STRING between START and END |
3306 | according to current locale using gettext (if available) and return | |
3307 | the result. The caller will take care of leaving the quotes intact. | |
3308 | The string will be left without the leading `$' by the caller. | |
3309 | If translation is performed, the translated string will be double-quoted | |
3310 | by the caller. The length of the translated string is returned in LENP, | |
3311 | if non-null. */ | |
3312 | static char * | |
cce855bc | 3313 | localeexpand (string, start, end, lineno, lenp) |
ccc6cda3 | 3314 | char *string; |
cce855bc | 3315 | int start, end, lineno, *lenp; |
ccc6cda3 | 3316 | { |
bb70624e JA |
3317 | int len, tlen, foundnl; |
3318 | char *temp, *t, *t2; | |
726f6388 | 3319 | |
ccc6cda3 JA |
3320 | temp = xmalloc (end - start + 1); |
3321 | for (tlen = 0, len = start; len < end; ) | |
3322 | temp[tlen++] = string[len++]; | |
3323 | temp[tlen] = '\0'; | |
3324 | ||
bb70624e JA |
3325 | /* If we're just dumping translatable strings, don't do anything with the |
3326 | string itself, but if we're dumping in `po' file format, convert it into a form more palatable to gettext(3) | |
3327 | and friends by quoting `"' and `\' with backslashes and converting <NL> | |
3328 | into `\n"<NL>"'. If we find a newline in TEMP, we first output a | |
3329 | `msgid ""' line and then the translated string; otherwise we output the | |
3330 | `msgid' and translated string all on one line. */ | |
ccc6cda3 JA |
3331 | if (dump_translatable_strings) |
3332 | { | |
cce855bc | 3333 | if (dump_po_strings) |
bb70624e JA |
3334 | { |
3335 | foundnl = 0; | |
3336 | t = mk_msgstr (temp, &foundnl); | |
3337 | t2 = foundnl ? "\"\"\n" : ""; | |
3338 | ||
3339 | printf ("#: %s:%d\nmsgid %s%s\nmsgstr \"\"\n", | |
3340 | (bash_input.name ? bash_input.name : "stdin"), lineno, t2, t); | |
3341 | free (t); | |
3342 | } | |
cce855bc JA |
3343 | else |
3344 | printf ("\"%s\"\n", temp); | |
bb70624e | 3345 | |
ccc6cda3 JA |
3346 | if (lenp) |
3347 | *lenp = tlen; | |
3348 | return (temp); | |
3349 | } | |
3350 | else if (*temp) | |
3351 | { | |
3352 | t = localetrans (temp, tlen, &len); | |
3353 | free (temp); | |
3354 | if (lenp) | |
3355 | *lenp = len; | |
3356 | return (t); | |
3357 | } | |
3358 | else | |
3359 | { | |
3360 | if (lenp) | |
3361 | *lenp = 0; | |
3362 | return (temp); | |
3363 | } | |
726f6388 JA |
3364 | } |
3365 | ||
3366 | /* Return 1 if TOKEN is a token that after being read would allow | |
3367 | a reserved word to be seen, else 0. */ | |
3368 | static int | |
3369 | reserved_word_acceptable (token) | |
3370 | int token; | |
3371 | { | |
726f6388 JA |
3372 | if (token == '\n' || token == ';' || token == '(' || token == ')' || |
3373 | token == '|' || token == '&' || token == '{' || | |
726f6388 JA |
3374 | token == '}' || /* XXX */ |
3375 | token == AND_AND || | |
3376 | token == BANG || | |
ccc6cda3 | 3377 | token == TIME || token == TIMEOPT || |
726f6388 JA |
3378 | token == DO || |
3379 | token == ELIF || | |
3380 | token == ELSE || | |
3381 | token == FI || | |
3382 | token == IF || | |
3383 | token == OR_OR || | |
3384 | token == SEMI_SEMI || | |
3385 | token == THEN || | |
3386 | token == UNTIL || | |
3387 | token == WHILE || | |
3388 | token == DONE || /* XXX these two are experimental */ | |
3389 | token == ESAC || | |
3390 | token == 0) | |
3391 | return (1); | |
3392 | else | |
3393 | return (0); | |
3394 | } | |
3395 | ||
3396 | /* Return the index of TOKEN in the alist of reserved words, or -1 if | |
3397 | TOKEN is not a shell reserved word. */ | |
3398 | int | |
3399 | find_reserved_word (token) | |
3400 | char *token; | |
3401 | { | |
3402 | int i; | |
ccc6cda3 | 3403 | for (i = 0; word_token_alist[i].word; i++) |
726f6388 JA |
3404 | if (STREQ (token, word_token_alist[i].word)) |
3405 | return i; | |
3406 | return -1; | |
3407 | } | |
3408 | ||
ccc6cda3 | 3409 | #if 0 |
726f6388 JA |
3410 | #if defined (READLINE) |
3411 | /* Called after each time readline is called. This insures that whatever | |
3412 | the new prompt string is gets propagated to readline's local prompt | |
3413 | variable. */ | |
3414 | static void | |
3415 | reset_readline_prompt () | |
3416 | { | |
ccc6cda3 JA |
3417 | char *temp_prompt; |
3418 | ||
726f6388 JA |
3419 | if (prompt_string_pointer) |
3420 | { | |
ccc6cda3 | 3421 | temp_prompt = (*prompt_string_pointer) |
726f6388 JA |
3422 | ? decode_prompt_string (*prompt_string_pointer) |
3423 | : (char *)NULL; | |
3424 | ||
3425 | if (temp_prompt == 0) | |
3426 | { | |
3427 | temp_prompt = xmalloc (1); | |
3428 | temp_prompt[0] = '\0'; | |
3429 | } | |
3430 | ||
3431 | FREE (current_readline_prompt); | |
726f6388 JA |
3432 | current_readline_prompt = temp_prompt; |
3433 | } | |
3434 | } | |
3435 | #endif /* READLINE */ | |
ccc6cda3 | 3436 | #endif /* 0 */ |
726f6388 JA |
3437 | |
3438 | #if defined (HISTORY) | |
3439 | /* A list of tokens which can be followed by newlines, but not by | |
3440 | semi-colons. When concatenating multiple lines of history, the | |
3441 | newline separator for such tokens is replaced with a space. */ | |
3442 | static int no_semi_successors[] = { | |
3443 | '\n', '{', '(', ')', ';', '&', '|', | |
ccc6cda3 | 3444 | CASE, DO, ELSE, IF, SEMI_SEMI, THEN, UNTIL, WHILE, AND_AND, OR_OR, IN, |
726f6388 JA |
3445 | 0 |
3446 | }; | |
3447 | ||
3448 | /* If we are not within a delimited expression, try to be smart | |
3449 | about which separators can be semi-colons and which must be | |
ccc6cda3 JA |
3450 | newlines. Returns the string that should be added into the |
3451 | history entry. */ | |
726f6388 JA |
3452 | char * |
3453 | history_delimiting_chars () | |
3454 | { | |
ccc6cda3 JA |
3455 | register int i; |
3456 | ||
3457 | if (dstack.delimiter_depth != 0) | |
3458 | return ("\n"); | |
3459 | ||
3460 | /* First, handle some special cases. */ | |
3461 | /*(*/ | |
3462 | /* If we just read `()', assume it's a function definition, and don't | |
3463 | add a semicolon. If the token before the `)' was not `(', and we're | |
3464 | not in the midst of parsing a case statement, assume it's a | |
3465 | parenthesized command and add the semicolon. */ | |
3466 | /*)(*/ | |
3467 | if (token_before_that == ')') | |
726f6388 | 3468 | { |
ccc6cda3 JA |
3469 | if (two_tokens_ago == '(') /*)*/ /* function def */ |
3470 | return " "; | |
3471 | /* This does not work for subshells inside case statement | |
3472 | command lists. It's a suboptimal solution. */ | |
3473 | else if (parser_state & PST_CASESTMT) /* case statement pattern */ | |
28ef6c31 | 3474 | return " "; |
ccc6cda3 | 3475 | else |
28ef6c31 | 3476 | return "; "; /* (...) subshell */ |
ccc6cda3 | 3477 | } |
cce855bc JA |
3478 | else if (token_before_that == WORD && two_tokens_ago == FUNCTION) |
3479 | return " "; /* function def using `function name' without `()' */ | |
726f6388 | 3480 | |
bb70624e JA |
3481 | else if (token_before_that == WORD && two_tokens_ago == FOR) |
3482 | { | |
3483 | /* Tricky. `for i\nin ...' should not have a semicolon, but | |
3484 | `for i\ndo ...' should. We do what we can. */ | |
3485 | for (i = shell_input_line_index; whitespace(shell_input_line[i]); i++) | |
28ef6c31 | 3486 | ; |
bb70624e JA |
3487 | if (shell_input_line[i] && shell_input_line[i] == 'i' && shell_input_line[i+1] == 'n') |
3488 | return " "; | |
3489 | return ";"; | |
3490 | } | |
3491 | ||
ccc6cda3 JA |
3492 | for (i = 0; no_semi_successors[i]; i++) |
3493 | { | |
3494 | if (token_before_that == no_semi_successors[i]) | |
3495 | return (" "); | |
726f6388 | 3496 | } |
ccc6cda3 JA |
3497 | |
3498 | return ("; "); | |
726f6388 JA |
3499 | } |
3500 | #endif /* HISTORY */ | |
3501 | ||
3502 | /* Issue a prompt, or prepare to issue a prompt when the next character | |
3503 | is read. */ | |
3504 | static void | |
3505 | prompt_again () | |
3506 | { | |
3507 | char *temp_prompt; | |
3508 | ||
3509 | if (!interactive) /* XXX */ | |
3510 | return; | |
3511 | ||
3512 | ps1_prompt = get_string_value ("PS1"); | |
3513 | ps2_prompt = get_string_value ("PS2"); | |
3514 | ||
3515 | if (!prompt_string_pointer) | |
3516 | prompt_string_pointer = &ps1_prompt; | |
3517 | ||
ccc6cda3 | 3518 | temp_prompt = *prompt_string_pointer |
726f6388 JA |
3519 | ? decode_prompt_string (*prompt_string_pointer) |
3520 | : (char *)NULL; | |
3521 | ||
3522 | if (temp_prompt == 0) | |
3523 | { | |
3524 | temp_prompt = xmalloc (1); | |
3525 | temp_prompt[0] = '\0'; | |
3526 | } | |
3527 | ||
3528 | current_prompt_string = *prompt_string_pointer; | |
3529 | prompt_string_pointer = &ps2_prompt; | |
3530 | ||
3531 | #if defined (READLINE) | |
3532 | if (!no_line_editing) | |
3533 | { | |
3534 | FREE (current_readline_prompt); | |
3535 | current_readline_prompt = temp_prompt; | |
3536 | } | |
3537 | else | |
3538 | #endif /* READLINE */ | |
3539 | { | |
3540 | FREE (current_decoded_prompt); | |
3541 | current_decoded_prompt = temp_prompt; | |
3542 | } | |
3543 | } | |
3544 | ||
bb70624e JA |
3545 | int |
3546 | get_current_prompt_level () | |
3547 | { | |
3548 | return ((current_prompt_string && current_prompt_string == ps2_prompt) ? 2 : 1); | |
3549 | } | |
3550 | ||
3551 | void | |
3552 | set_current_prompt_level (x) | |
3553 | int x; | |
3554 | { | |
3555 | prompt_string_pointer = (x == 2) ? &ps2_prompt : &ps1_prompt; | |
3556 | current_prompt_string = *prompt_string_pointer; | |
3557 | } | |
3558 | ||
726f6388 JA |
3559 | static void |
3560 | print_prompt () | |
3561 | { | |
3562 | fprintf (stderr, "%s", current_decoded_prompt); | |
3563 | fflush (stderr); | |
3564 | } | |
3565 | ||
3566 | /* Return a string which will be printed as a prompt. The string | |
3567 | may contain special characters which are decoded as follows: | |
ccc6cda3 JA |
3568 | |
3569 | \a bell (ascii 07) | |
3570 | \e escape (ascii 033) | |
3571 | \d the date in Day Mon Date format | |
3572 | \h the hostname up to the first `.' | |
3573 | \H the hostname | |
bb70624e JA |
3574 | \j the number of active jobs |
3575 | \l the basename of the shell's tty device name | |
726f6388 JA |
3576 | \n CRLF |
3577 | \s the name of the shell | |
ccc6cda3 JA |
3578 | \t the time in 24-hour hh:mm:ss format |
3579 | \T the time in 12-hour hh:mm:ss format | |
3580 | \@ the time in 12-hour am/pm format | |
3581 | \v the version of bash (e.g., 2.00) | |
3582 | \V the release of bash, version + patchlevel (e.g., 2.00.0) | |
726f6388 | 3583 | \w the current working directory |
ccc6cda3 | 3584 | \W the last element of $PWD |
726f6388 | 3585 | \u your username |
726f6388 JA |
3586 | \# the command number of this command |
3587 | \! the history number of this command | |
3588 | \$ a $ or a # if you are root | |
ccc6cda3 | 3589 | \nnn character code nnn in octal |
726f6388 | 3590 | \\ a backslash |
ccc6cda3 JA |
3591 | \[ begin a sequence of non-printing chars |
3592 | \] end a sequence of non-printing chars | |
726f6388 | 3593 | */ |
d166f048 | 3594 | #define PROMPT_GROWTH 48 |
726f6388 JA |
3595 | char * |
3596 | decode_prompt_string (string) | |
3597 | char *string; | |
3598 | { | |
726f6388 | 3599 | WORD_LIST *list; |
ccc6cda3 JA |
3600 | char *result, *t; |
3601 | struct dstack save_dstack; | |
726f6388 | 3602 | #if defined (PROMPT_STRING_DECODE) |
ccc6cda3 JA |
3603 | int result_size, result_index; |
3604 | int c, n; | |
3605 | char *temp, octal_string[4]; | |
3606 | time_t the_time; | |
726f6388 | 3607 | |
ccc6cda3 JA |
3608 | result = xmalloc (result_size = PROMPT_GROWTH); |
3609 | result[result_index = 0] = 0; | |
3610 | temp = (char *)NULL; | |
726f6388 JA |
3611 | |
3612 | while (c = *string++) | |
3613 | { | |
3614 | if (posixly_correct && c == '!') | |
3615 | { | |
3616 | if (*string == '!') | |
3617 | { | |
3618 | temp = savestring ("!"); | |
3619 | goto add_string; | |
3620 | } | |
3621 | else | |
3622 | { | |
3623 | #if !defined (HISTORY) | |
3624 | temp = savestring ("1"); | |
3625 | #else /* HISTORY */ | |
3626 | temp = itos (history_number ()); | |
3627 | #endif /* HISTORY */ | |
3628 | string--; /* add_string increments string again. */ | |
3629 | goto add_string; | |
3630 | } | |
ccc6cda3 | 3631 | } |
726f6388 JA |
3632 | if (c == '\\') |
3633 | { | |
3634 | c = *string; | |
3635 | ||
3636 | switch (c) | |
3637 | { | |
3638 | case '0': | |
3639 | case '1': | |
3640 | case '2': | |
3641 | case '3': | |
3642 | case '4': | |
3643 | case '5': | |
3644 | case '6': | |
3645 | case '7': | |
ccc6cda3 JA |
3646 | strncpy (octal_string, string, 3); |
3647 | octal_string[3] = '\0'; | |
726f6388 | 3648 | |
ccc6cda3 JA |
3649 | n = read_octal (octal_string); |
3650 | temp = xmalloc (3); | |
726f6388 | 3651 | |
ccc6cda3 JA |
3652 | if (n == CTLESC || n == CTLNUL) |
3653 | { | |
ccc6cda3 JA |
3654 | temp[0] = CTLESC; |
3655 | temp[1] = n; | |
3656 | temp[2] = '\0'; | |
3657 | } | |
3658 | else if (n == -1) | |
3659 | { | |
3660 | temp[0] = '\\'; | |
3661 | temp[1] = '\0'; | |
3662 | } | |
3663 | else | |
3664 | { | |
ccc6cda3 JA |
3665 | temp[0] = n; |
3666 | temp[1] = '\0'; | |
3667 | } | |
726f6388 | 3668 | |
28ef6c31 JA |
3669 | for (c = 0; n != -1 && c < 3 && ISOCTAL (*string); c++) |
3670 | string++; | |
3671 | ||
ccc6cda3 JA |
3672 | c = 0; |
3673 | goto add_string; | |
726f6388 | 3674 | |
726f6388 JA |
3675 | case 't': |
3676 | case 'd': | |
ccc6cda3 JA |
3677 | case 'T': |
3678 | case '@': | |
726f6388 | 3679 | /* Make the current time/date into a string. */ |
ccc6cda3 JA |
3680 | the_time = time (0); |
3681 | temp = ctime (&the_time); | |
726f6388 | 3682 | |
ccc6cda3 JA |
3683 | temp = (c != 'd') ? savestring (temp + 11) : savestring (temp); |
3684 | temp[(c != 'd') ? 8 : 10] = '\0'; | |
726f6388 | 3685 | |
ccc6cda3 JA |
3686 | /* quick and dirty conversion to 12-hour time */ |
3687 | if (c == 'T' || c == '@') | |
3688 | { | |
3689 | if (c == '@') | |
3690 | { | |
3691 | temp[5] = 'a'; /* am/pm format */ | |
3692 | temp[6] = 'm'; | |
3693 | temp[7] = '\0'; | |
3694 | } | |
3695 | c = temp[2]; | |
3696 | temp[2] = '\0'; | |
3697 | n = atoi (temp); | |
3698 | temp[2] = c; | |
3699 | n -= 12; | |
3700 | if (n > 0) | |
3701 | { | |
3702 | temp[0] = (n / 10) + '0'; | |
3703 | temp[1] = (n % 10) + '0'; | |
3704 | } | |
3705 | if (n >= 0 && temp[5] == 'a') | |
3706 | temp[5] = 'p'; | |
3707 | } | |
3708 | goto add_string; | |
726f6388 | 3709 | |
cce855bc JA |
3710 | case 'r': |
3711 | temp = xmalloc (2); | |
3712 | temp[0] = '\r'; | |
3713 | temp[1] = '\0'; | |
3714 | goto add_string; | |
3715 | ||
726f6388 | 3716 | case 'n': |
ccc6cda3 JA |
3717 | temp = xmalloc (3); |
3718 | temp[0] = no_line_editing ? '\n' : '\r'; | |
3719 | temp[1] = no_line_editing ? '\0' : '\n'; | |
3720 | temp[2] = '\0'; | |
726f6388 JA |
3721 | goto add_string; |
3722 | ||
3723 | case 's': | |
ccc6cda3 JA |
3724 | temp = base_pathname (shell_name); |
3725 | temp = savestring (temp); | |
3726 | goto add_string; | |
3727 | ||
3728 | case 'v': | |
3729 | case 'V': | |
3730 | temp = xmalloc (8); | |
3731 | if (c == 'v') | |
3732 | strcpy (temp, dist_version); | |
3733 | else | |
3734 | sprintf (temp, "%s.%d", dist_version, patch_level); | |
3735 | goto add_string; | |
3736 | ||
726f6388 JA |
3737 | case 'w': |
3738 | case 'W': | |
3739 | { | |
ccc6cda3 JA |
3740 | /* Use the value of PWD because it is much more efficient. */ |
3741 | char t_string[PATH_MAX]; | |
e8ce775d | 3742 | int tlen; |
726f6388 JA |
3743 | |
3744 | temp = get_string_value ("PWD"); | |
3745 | ||
ccc6cda3 JA |
3746 | if (temp == 0) |
3747 | { | |
3748 | if (getcwd (t_string, sizeof(t_string)) == 0) | |
3749 | { | |
28ef6c31 | 3750 | t_string[0] = '.'; |
e8ce775d | 3751 | tlen = 1; |
ccc6cda3 | 3752 | } |
e8ce775d JA |
3753 | else |
3754 | tlen = strlen (t_string); | |
ccc6cda3 | 3755 | } |
726f6388 | 3756 | else |
e8ce775d JA |
3757 | { |
3758 | tlen = sizeof (t_string) - 1; | |
3759 | strncpy (t_string, temp, tlen); | |
3760 | } | |
3761 | t_string[tlen] = '\0'; | |
726f6388 | 3762 | |
28ef6c31 JA |
3763 | #define ROOT_PATH(x) ((x)[0] == '/' && (x)[1] == 0) |
3764 | #define DOUBLE_SLASH_ROOT(x) ((x)[0] == '/' && (x)[1] == '/' && (x)[2] == 0) | |
726f6388 JA |
3765 | if (c == 'W') |
3766 | { | |
28ef6c31 JA |
3767 | if (ROOT_PATH (t_string) == 0 && DOUBLE_SLASH_ROOT (t_string) == 0) |
3768 | { | |
3769 | t = strrchr (t_string, '/'); | |
3770 | if (t) | |
3771 | strcpy (t_string, t + 1); | |
3772 | } | |
726f6388 | 3773 | } |
28ef6c31 JA |
3774 | #undef ROOT_PATH |
3775 | #undef DOUBLE_SLASH_ROOT | |
726f6388 | 3776 | else |
e8ce775d JA |
3777 | /* polite_directory_format is guaranteed to return a string |
3778 | no longer than PATH_MAX - 1 characters. */ | |
ccc6cda3 JA |
3779 | strcpy (t_string, polite_directory_format (t_string)); |
3780 | ||
3781 | /* If we're going to be expanding the prompt string later, | |
3782 | quote the directory name. */ | |
3783 | if (promptvars || posixly_correct) | |
bb70624e JA |
3784 | /* Make sure that expand_prompt_string is called with a |
3785 | second argument of Q_DOUBLE_QUOTE if we use this | |
3786 | function here. */ | |
28ef6c31 | 3787 | temp = sh_backslash_quote_for_double_quotes (t_string); |
ccc6cda3 JA |
3788 | else |
3789 | temp = savestring (t_string); | |
3790 | ||
726f6388 JA |
3791 | goto add_string; |
3792 | } | |
ccc6cda3 | 3793 | |
726f6388 | 3794 | case 'u': |
bb70624e JA |
3795 | if (current_user.user_name == 0) |
3796 | get_current_user_info (); | |
ccc6cda3 JA |
3797 | temp = savestring (current_user.user_name); |
3798 | goto add_string; | |
726f6388 JA |
3799 | |
3800 | case 'h': | |
ccc6cda3 JA |
3801 | case 'H': |
3802 | temp = savestring (current_host_name); | |
3803 | if (c == 'h' && (t = (char *)strchr (temp, '.'))) | |
3804 | *t = '\0'; | |
3805 | goto add_string; | |
726f6388 JA |
3806 | |
3807 | case '#': | |
ccc6cda3 JA |
3808 | temp = itos (current_command_number); |
3809 | goto add_string; | |
726f6388 JA |
3810 | |
3811 | case '!': | |
726f6388 | 3812 | #if !defined (HISTORY) |
ccc6cda3 | 3813 | temp = savestring ("1"); |
726f6388 | 3814 | #else /* HISTORY */ |
ccc6cda3 | 3815 | temp = itos (history_number ()); |
726f6388 | 3816 | #endif /* HISTORY */ |
ccc6cda3 | 3817 | goto add_string; |
726f6388 JA |
3818 | |
3819 | case '$': | |
b72432fd JA |
3820 | t = temp = xmalloc (3); |
3821 | if ((promptvars || posixly_correct) && (current_user.euid != 0)) | |
3822 | *t++ = '\\'; | |
3823 | *t++ = current_user.euid == 0 ? '#' : '$'; | |
3824 | *t = '\0'; | |
726f6388 JA |
3825 | goto add_string; |
3826 | ||
bb70624e JA |
3827 | case 'j': |
3828 | temp = itos (count_all_jobs ()); | |
3829 | goto add_string; | |
3830 | ||
3831 | case 'l': | |
3832 | #if defined (HAVE_TTYNAME) | |
3833 | temp = (char *)ttyname (fileno (stdin)); | |
3834 | t = temp ? base_pathname (temp) : "tty"; | |
3835 | temp = savestring (t); | |
3836 | #else | |
3837 | temp = savestring ("tty"); | |
3838 | #endif /* !HAVE_TTYNAME */ | |
3839 | goto add_string; | |
3840 | ||
726f6388 JA |
3841 | #if defined (READLINE) |
3842 | case '[': | |
3843 | case ']': | |
ccc6cda3 | 3844 | temp = xmalloc (3); |
726f6388 JA |
3845 | temp[0] = '\001'; |
3846 | temp[1] = (c == '[') ? RL_PROMPT_START_IGNORE : RL_PROMPT_END_IGNORE; | |
3847 | temp[2] = '\0'; | |
3848 | goto add_string; | |
ccc6cda3 | 3849 | #endif /* READLINE */ |
726f6388 JA |
3850 | |
3851 | case '\\': | |
ccc6cda3 JA |
3852 | temp = xmalloc (2); |
3853 | temp[0] = c; | |
3854 | temp[1] = '\0'; | |
3855 | goto add_string; | |
3856 | ||
3857 | case 'a': | |
3858 | case 'e': | |
3859 | temp = xmalloc (2); | |
3860 | temp[0] = (c == 'a') ? '\07' : '\033'; | |
3861 | temp[1] = '\0'; | |
726f6388 JA |
3862 | goto add_string; |
3863 | ||
3864 | default: | |
ccc6cda3 JA |
3865 | temp = xmalloc (3); |
3866 | temp[0] = '\\'; | |
726f6388 | 3867 | temp[1] = c; |
ccc6cda3 | 3868 | temp[2] = '\0'; |
726f6388 JA |
3869 | |
3870 | add_string: | |
3871 | if (c) | |
3872 | string++; | |
3873 | result = | |
3874 | sub_append_string (temp, result, &result_index, &result_size); | |
ccc6cda3 | 3875 | temp = (char *)NULL; /* Freed in sub_append_string (). */ |
726f6388 JA |
3876 | result[result_index] = '\0'; |
3877 | break; | |
3878 | } | |
3879 | } | |
3880 | else | |
3881 | { | |
ccc6cda3 | 3882 | RESIZE_MALLOCED_BUFFER (result, result_index, 3, result_size, PROMPT_GROWTH); |
726f6388 JA |
3883 | result[result_index++] = c; |
3884 | result[result_index] = '\0'; | |
3885 | } | |
3886 | } | |
3887 | #else /* !PROMPT_STRING_DECODE */ | |
3888 | result = savestring (string); | |
3889 | #endif /* !PROMPT_STRING_DECODE */ | |
3890 | ||
ccc6cda3 JA |
3891 | /* Save the delimiter stack and point `dstack' to temp space so any |
3892 | command substitutions in the prompt string won't result in screwing | |
3893 | up the parser's quoting state. */ | |
3894 | save_dstack = dstack; | |
3895 | dstack = temp_dstack; | |
3896 | dstack.delimiter_depth = 0; | |
3897 | ||
726f6388 JA |
3898 | /* Perform variable and parameter expansion and command substitution on |
3899 | the prompt string. */ | |
ccc6cda3 JA |
3900 | if (promptvars || posixly_correct) |
3901 | { | |
bb70624e | 3902 | list = expand_prompt_string (result, Q_DOUBLE_QUOTES); |
ccc6cda3 JA |
3903 | free (result); |
3904 | result = string_list (list); | |
3905 | dispose_words (list); | |
3906 | } | |
3907 | else | |
3908 | { | |
3909 | t = dequote_string (result); | |
3910 | free (result); | |
3911 | result = t; | |
3912 | } | |
3913 | ||
3914 | dstack = save_dstack; | |
726f6388 JA |
3915 | |
3916 | return (result); | |
3917 | } | |
3918 | ||
3919 | /* Report a syntax error, and restart the parser. Call here for fatal | |
3920 | errors. */ | |
ccc6cda3 | 3921 | int |
726f6388 JA |
3922 | yyerror () |
3923 | { | |
3924 | report_syntax_error ((char *)NULL); | |
3925 | reset_parser (); | |
ccc6cda3 | 3926 | return (0); |
726f6388 JA |
3927 | } |
3928 | ||
3929 | /* Report a syntax error with line numbers, etc. | |
3930 | Call here for recoverable errors. If you have a message to print, | |
3931 | then place it in MESSAGE, otherwise pass NULL and this will figure | |
3932 | out an appropriate message for you. */ | |
3933 | static void | |
3934 | report_syntax_error (message) | |
3935 | char *message; | |
3936 | { | |
ccc6cda3 JA |
3937 | char *msg, *t; |
3938 | int token_end, i; | |
3939 | char msg2[2]; | |
3940 | ||
726f6388 JA |
3941 | if (message) |
3942 | { | |
ccc6cda3 JA |
3943 | parser_error (line_number, "%s", message); |
3944 | if (interactive && EOF_Reached) | |
3945 | EOF_Reached = 0; | |
726f6388 JA |
3946 | last_command_exit_value = EX_USAGE; |
3947 | return; | |
3948 | } | |
3949 | ||
ccc6cda3 JA |
3950 | /* If the line of input we're reading is not null, try to find the |
3951 | objectionable token. */ | |
726f6388 JA |
3952 | if (shell_input_line && *shell_input_line) |
3953 | { | |
ccc6cda3 JA |
3954 | t = shell_input_line; |
3955 | i = shell_input_line_index; | |
3956 | token_end = 0; | |
726f6388 | 3957 | |
ccc6cda3 | 3958 | if (i && t[i] == '\0') |
726f6388 JA |
3959 | i--; |
3960 | ||
ccc6cda3 | 3961 | while (i && (whitespace (t[i]) || t[i] == '\n')) |
726f6388 JA |
3962 | i--; |
3963 | ||
3964 | if (i) | |
3965 | token_end = i + 1; | |
3966 | ||
ccc6cda3 | 3967 | while (i && (member (t[i], " \n\t;|&") == 0)) |
726f6388 JA |
3968 | i--; |
3969 | ||
ccc6cda3 | 3970 | while (i != token_end && (whitespace (t[i]) || t[i] == '\n')) |
726f6388 JA |
3971 | i++; |
3972 | ||
ccc6cda3 JA |
3973 | /* Print the offending token. */ |
3974 | if (token_end || (i == 0 && token_end == 0)) | |
726f6388 | 3975 | { |
ccc6cda3 | 3976 | if (token_end) |
bb70624e | 3977 | msg = substring (t, i, token_end); |
ccc6cda3 JA |
3978 | else /* one-character token */ |
3979 | { | |
3980 | msg2[0] = t[i]; | |
3981 | msg2[1] = '\0'; | |
3982 | msg = msg2; | |
3983 | } | |
726f6388 | 3984 | |
ccc6cda3 | 3985 | parser_error (line_number, "syntax error near unexpected token `%s'", msg); |
726f6388 | 3986 | |
ccc6cda3 JA |
3987 | if (msg != msg2) |
3988 | free (msg); | |
726f6388 JA |
3989 | } |
3990 | ||
ccc6cda3 JA |
3991 | /* If not interactive, print the line containing the error. */ |
3992 | if (interactive == 0) | |
726f6388 | 3993 | { |
ccc6cda3 JA |
3994 | msg = savestring (shell_input_line); |
3995 | token_end = strlen (msg); | |
3996 | while (token_end && msg[token_end - 1] == '\n') | |
3997 | msg[--token_end] = '\0'; | |
726f6388 | 3998 | |
ccc6cda3 JA |
3999 | parser_error (line_number, "`%s'", msg); |
4000 | free (msg); | |
726f6388 JA |
4001 | } |
4002 | } | |
4003 | else | |
4004 | { | |
ccc6cda3 JA |
4005 | msg = EOF_Reached ? "syntax error: unexpected end of file" : "syntax error"; |
4006 | parser_error (line_number, "%s", msg); | |
4007 | /* When the shell is interactive, this file uses EOF_Reached | |
4008 | only for error reporting. Other mechanisms are used to | |
4009 | decide whether or not to exit. */ | |
4010 | if (interactive && EOF_Reached) | |
4011 | EOF_Reached = 0; | |
726f6388 JA |
4012 | } |
4013 | last_command_exit_value = EX_USAGE; | |
4014 | } | |
4015 | ||
4016 | /* ??? Needed function. ??? We have to be able to discard the constructs | |
4017 | created during parsing. In the case of error, we want to return | |
4018 | allocated objects to the memory pool. In the case of no error, we want | |
4019 | to throw away the information about where the allocated objects live. | |
4020 | (dispose_command () will actually free the command. */ | |
ccc6cda3 | 4021 | static void |
726f6388 JA |
4022 | discard_parser_constructs (error_p) |
4023 | int error_p; | |
4024 | { | |
4025 | } | |
ccc6cda3 | 4026 | |
726f6388 JA |
4027 | /* Do that silly `type "bye" to exit' stuff. You know, "ignoreeof". */ |
4028 | ||
4029 | /* A flag denoting whether or not ignoreeof is set. */ | |
4030 | int ignoreeof = 0; | |
4031 | ||
4032 | /* The number of times that we have encountered an EOF character without | |
4033 | another character intervening. When this gets above the limit, the | |
4034 | shell terminates. */ | |
4035 | int eof_encountered = 0; | |
4036 | ||
4037 | /* The limit for eof_encountered. */ | |
4038 | int eof_encountered_limit = 10; | |
4039 | ||
4040 | /* If we have EOF as the only input unit, this user wants to leave | |
4041 | the shell. If the shell is not interactive, then just leave. | |
4042 | Otherwise, if ignoreeof is set, and we haven't done this the | |
4043 | required number of times in a row, print a message. */ | |
4044 | static void | |
4045 | handle_eof_input_unit () | |
4046 | { | |
4047 | if (interactive) | |
4048 | { | |
4049 | /* shell.c may use this to decide whether or not to write out the | |
4050 | history, among other things. We use it only for error reporting | |
4051 | in this file. */ | |
4052 | if (EOF_Reached) | |
4053 | EOF_Reached = 0; | |
4054 | ||
4055 | /* If the user wants to "ignore" eof, then let her do so, kind of. */ | |
4056 | if (ignoreeof) | |
4057 | { | |
4058 | if (eof_encountered < eof_encountered_limit) | |
4059 | { | |
4060 | fprintf (stderr, "Use \"%s\" to leave the shell.\n", | |
4061 | login_shell ? "logout" : "exit"); | |
4062 | eof_encountered++; | |
4063 | /* Reset the prompt string to be $PS1. */ | |
4064 | prompt_string_pointer = (char **)NULL; | |
4065 | prompt_again (); | |
4066 | last_read_token = current_token = '\n'; | |
4067 | return; | |
ccc6cda3 | 4068 | } |
726f6388 JA |
4069 | } |
4070 | ||
4071 | /* In this case EOF should exit the shell. Do it now. */ | |
4072 | reset_parser (); | |
4073 | exit_builtin ((WORD_LIST *)NULL); | |
4074 | } | |
4075 | else | |
4076 | { | |
4077 | /* We don't write history files, etc., for non-interactive shells. */ | |
4078 | EOF_Reached = 1; | |
4079 | } | |
4080 | } | |
bb70624e JA |
4081 | |
4082 | static WORD_LIST parse_string_error; | |
4083 | ||
4084 | /* Take a string and run it through the shell parser, returning the | |
4085 | resultant word list. Used by compound array assignment. */ | |
4086 | WORD_LIST * | |
4087 | parse_string_to_word_list (s, whom) | |
4088 | char *s, *whom; | |
4089 | { | |
4090 | WORD_LIST *wl; | |
4091 | int tok, orig_line_number, orig_input_terminator; | |
28ef6c31 | 4092 | int orig_line_count; |
bb70624e JA |
4093 | #if defined (HISTORY) |
4094 | int old_remember_on_history, old_history_expansion_inhibited; | |
4095 | #endif | |
4096 | ||
4097 | #if defined (HISTORY) | |
4098 | old_remember_on_history = remember_on_history; | |
4099 | # if defined (BANG_HISTORY) | |
4100 | old_history_expansion_inhibited = history_expansion_inhibited; | |
4101 | # endif | |
4102 | bash_history_disable (); | |
4103 | #endif | |
4104 | ||
4105 | orig_line_number = line_number; | |
28ef6c31 | 4106 | orig_line_count = current_command_line_count; |
bb70624e JA |
4107 | orig_input_terminator = shell_input_line_terminator; |
4108 | ||
4109 | push_stream (1); | |
4110 | last_read_token = '\n'; | |
28ef6c31 | 4111 | current_command_line_count = 0; |
bb70624e JA |
4112 | |
4113 | with_input_from_string (s, whom); | |
4114 | wl = (WORD_LIST *)NULL; | |
4115 | while ((tok = read_token (READ)) != yacc_EOF) | |
4116 | { | |
4117 | if (tok == '\n' && *bash_input.location.string == '\0') | |
4118 | break; | |
28ef6c31 JA |
4119 | if (tok == '\n') /* Allow newlines in compound assignments */ |
4120 | continue; | |
bb70624e JA |
4121 | if (tok != WORD && tok != ASSIGNMENT_WORD) |
4122 | { | |
4123 | line_number = orig_line_number + line_number - 1; | |
4124 | yyerror (); /* does the right thing */ | |
4125 | if (wl) | |
4126 | dispose_words (wl); | |
4127 | wl = &parse_string_error; | |
4128 | break; | |
4129 | } | |
4130 | wl = make_word_list (yylval.word, wl); | |
4131 | } | |
4132 | ||
4133 | last_read_token = '\n'; | |
4134 | pop_stream (); | |
4135 | ||
4136 | #if defined (HISTORY) | |
4137 | remember_on_history = old_remember_on_history; | |
4138 | # if defined (BANG_HISTORY) | |
4139 | history_expansion_inhibited = old_history_expansion_inhibited; | |
4140 | # endif /* BANG_HISTORY */ | |
4141 | #endif /* HISTORY */ | |
4142 | ||
28ef6c31 | 4143 | current_command_line_count = orig_line_count; |
bb70624e JA |
4144 | shell_input_line_terminator = orig_input_terminator; |
4145 | ||
4146 | if (wl == &parse_string_error) | |
4147 | { | |
4148 | last_command_exit_value = EXECUTION_FAILURE; | |
4149 | if (interactive_shell == 0 && posixly_correct) | |
4150 | jump_to_top_level (FORCE_EOF); | |
4151 | else | |
4152 | jump_to_top_level (DISCARD); | |
4153 | } | |
4154 | ||
4155 | return (REVERSE_LIST (wl, WORD_LIST *)); | |
4156 | } |