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Commit | Line | Data |
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726f6388 JA |
1 | /* Yacc grammar for bash. */ |
2 | ||
d3ad40de | 3 | /* Copyright (C) 1989-2007 Free Software Foundation, Inc. |
726f6388 JA |
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> | |
f73dda09 | 38 | #include "chartypes.h" |
ccc6cda3 JA |
39 | #include <signal.h> |
40 | ||
41 | #include "memalloc.h" | |
42 | ||
5e13499c CR |
43 | #include "bashintl.h" |
44 | ||
7117c2d2 JA |
45 | #define NEED_STRFTIME_DECL /* used in externs.h */ |
46 | ||
726f6388 | 47 | #include "shell.h" |
ccc6cda3 | 48 | #include "trap.h" |
726f6388 | 49 | #include "flags.h" |
ccc6cda3 JA |
50 | #include "parser.h" |
51 | #include "mailcheck.h" | |
f73dda09 | 52 | #include "test.h" |
301e2142 | 53 | #include "builtins.h" |
ccc6cda3 JA |
54 | #include "builtins/common.h" |
55 | #include "builtins/builtext.h" | |
726f6388 | 56 | |
7117c2d2 JA |
57 | #include "shmbutil.h" |
58 | ||
726f6388 | 59 | #if defined (READLINE) |
ccc6cda3 | 60 | # include "bashline.h" |
726f6388 JA |
61 | # include <readline/readline.h> |
62 | #endif /* READLINE */ | |
63 | ||
64 | #if defined (HISTORY) | |
65 | # include "bashhist.h" | |
66 | # include <readline/history.h> | |
67 | #endif /* HISTORY */ | |
68 | ||
69 | #if defined (JOB_CONTROL) | |
70 | # include "jobs.h" | |
71 | #endif /* JOB_CONTROL */ | |
72 | ||
73 | #if defined (ALIAS) | |
74 | # include "alias.h" | |
d3a24ed2 CR |
75 | #else |
76 | typedef void *alias_t; | |
726f6388 JA |
77 | #endif /* ALIAS */ |
78 | ||
79 | #if defined (PROMPT_STRING_DECODE) | |
cce855bc JA |
80 | # ifndef _MINIX |
81 | # include <sys/param.h> | |
82 | # endif | |
83 | # include <time.h> | |
7117c2d2 JA |
84 | # if defined (TM_IN_SYS_TIME) |
85 | # include <sys/types.h> | |
86 | # include <sys/time.h> | |
87 | # endif /* TM_IN_SYS_TIME */ | |
cce855bc | 88 | # include "maxpath.h" |
726f6388 JA |
89 | #endif /* PROMPT_STRING_DECODE */ |
90 | ||
ccc6cda3 JA |
91 | #define RE_READ_TOKEN -99 |
92 | #define NO_EXPANSION -100 | |
93 | ||
7117c2d2 JA |
94 | #ifdef DEBUG |
95 | # define YYDEBUG 1 | |
96 | #else | |
97 | # define YYDEBUG 0 | |
98 | #endif | |
99 | ||
100 | #if defined (HANDLE_MULTIBYTE) | |
101 | # define last_shell_getc_is_singlebyte \ | |
102 | ((shell_input_line_index > 1) \ | |
103 | ? shell_input_line_property[shell_input_line_index - 1] \ | |
104 | : 1) | |
105 | # define MBTEST(x) ((x) && last_shell_getc_is_singlebyte) | |
106 | #else | |
107 | # define last_shell_getc_is_singlebyte 1 | |
108 | # define MBTEST(x) ((x)) | |
109 | #endif | |
ccc6cda3 | 110 | |
cce855bc | 111 | #if defined (EXTENDED_GLOB) |
cce855bc JA |
112 | extern int extended_glob; |
113 | #endif | |
114 | ||
726f6388 | 115 | extern int eof_encountered; |
ccc6cda3 | 116 | extern int no_line_editing, running_under_emacs; |
726f6388 | 117 | extern int current_command_number; |
ccc6cda3 | 118 | extern int sourcelevel; |
726f6388 JA |
119 | extern int posixly_correct; |
120 | extern int last_command_exit_value; | |
726f6388 | 121 | extern char *shell_name, *current_host_name; |
ccc6cda3 JA |
122 | extern char *dist_version; |
123 | extern int patch_level; | |
cce855bc | 124 | extern int dump_translatable_strings, dump_po_strings; |
f73dda09 | 125 | extern sh_builtin_func_t *last_shell_builtin, *this_shell_builtin; |
726f6388 JA |
126 | #if defined (BUFFERED_INPUT) |
127 | extern int bash_input_fd_changed; | |
128 | #endif | |
129 | ||
bb70624e | 130 | extern int errno; |
726f6388 JA |
131 | /* **************************************************************** */ |
132 | /* */ | |
133 | /* "Forward" declarations */ | |
134 | /* */ | |
135 | /* **************************************************************** */ | |
136 | ||
f73dda09 JA |
137 | #ifdef DEBUG |
138 | static void debug_parser __P((int)); | |
139 | #endif | |
140 | ||
141 | static int yy_getc __P((void)); | |
142 | static int yy_ungetc __P((int)); | |
143 | ||
144 | #if defined (READLINE) | |
145 | static int yy_readline_get __P((void)); | |
146 | static int yy_readline_unget __P((int)); | |
147 | #endif | |
148 | ||
149 | static int yy_string_get __P((void)); | |
150 | static int yy_string_unget __P((int)); | |
151 | static int yy_stream_get __P((void)); | |
152 | static int yy_stream_unget __P((int)); | |
153 | ||
154 | static int shell_getc __P((int)); | |
155 | static void shell_ungetc __P((int)); | |
156 | static void discard_until __P((int)); | |
157 | ||
158 | #if defined (ALIAS) || defined (DPAREN_ARITHMETIC) | |
159 | static void push_string __P((char *, int, alias_t *)); | |
160 | static void pop_string __P((void)); | |
161 | static void free_string_list __P((void)); | |
162 | #endif | |
163 | ||
164 | static char *read_a_line __P((int)); | |
165 | ||
f73dda09 JA |
166 | static int reserved_word_acceptable __P((int)); |
167 | static int yylex __P((void)); | |
168 | static int alias_expand_token __P((char *)); | |
169 | static int time_command_acceptable __P((void)); | |
170 | static int special_case_tokens __P((char *)); | |
171 | static int read_token __P((int)); | |
172 | static char *parse_matched_pair __P((int, int, int, int *, int)); | |
7117c2d2 JA |
173 | #if defined (ARRAY_VARS) |
174 | static char *parse_compound_assignment __P((int *)); | |
175 | #endif | |
f73dda09 | 176 | #if defined (DPAREN_ARITHMETIC) || defined (ARITH_FOR_COMMAND) |
7117c2d2 | 177 | static int parse_dparen __P((int)); |
d3a24ed2 | 178 | static int parse_arith_cmd __P((char **, int)); |
f73dda09 | 179 | #endif |
cce855bc | 180 | #if defined (COND_COMMAND) |
7117c2d2 | 181 | static void cond_error __P((void)); |
f73dda09 JA |
182 | static COND_COM *cond_expr __P((void)); |
183 | static COND_COM *cond_or __P((void)); | |
184 | static COND_COM *cond_and __P((void)); | |
185 | static COND_COM *cond_term __P((void)); | |
186 | static int cond_skip_newlines __P((void)); | |
187 | static COMMAND *parse_cond_command __P((void)); | |
cce855bc | 188 | #endif |
7117c2d2 JA |
189 | #if defined (ARRAY_VARS) |
190 | static int token_is_assignment __P((char *, int)); | |
191 | static int token_is_ident __P((char *, int)); | |
192 | #endif | |
f73dda09 JA |
193 | static int read_token_word __P((int)); |
194 | static void discard_parser_constructs __P((int)); | |
726f6388 | 195 | |
7117c2d2 JA |
196 | static char *error_token_from_token __P((int)); |
197 | static char *error_token_from_text __P((void)); | |
198 | static void print_offending_line __P((void)); | |
f73dda09 | 199 | static void report_syntax_error __P((char *)); |
7117c2d2 | 200 | |
f73dda09 JA |
201 | static void handle_eof_input_unit __P((void)); |
202 | static void prompt_again __P((void)); | |
d166f048 | 203 | #if 0 |
f73dda09 | 204 | static void reset_readline_prompt __P((void)); |
d166f048 | 205 | #endif |
f73dda09 | 206 | static void print_prompt __P((void)); |
726f6388 | 207 | |
7117c2d2 JA |
208 | #if defined (HANDLE_MULTIBYTE) |
209 | static void set_line_mbstate __P((void)); | |
210 | static char *shell_input_line_property = NULL; | |
211 | #else | |
212 | # define set_line_mbstate() | |
213 | #endif | |
214 | ||
f73dda09 | 215 | extern int yyerror __P((const char *)); |
d166f048 | 216 | |
7117c2d2 JA |
217 | #ifdef DEBUG |
218 | extern int yydebug; | |
219 | #endif | |
220 | ||
ccc6cda3 JA |
221 | /* Default prompt strings */ |
222 | char *primary_prompt = PPROMPT; | |
223 | char *secondary_prompt = SPROMPT; | |
224 | ||
726f6388 JA |
225 | /* PROMPT_STRING_POINTER points to one of these, never to an actual string. */ |
226 | char *ps1_prompt, *ps2_prompt; | |
227 | ||
228 | /* Handle on the current prompt string. Indirectly points through | |
229 | ps1_ or ps2_prompt. */ | |
230 | char **prompt_string_pointer = (char **)NULL; | |
231 | char *current_prompt_string; | |
232 | ||
ccc6cda3 JA |
233 | /* Non-zero means we expand aliases in commands. */ |
234 | int expand_aliases = 0; | |
235 | ||
236 | /* If non-zero, the decoded prompt string undergoes parameter and | |
237 | variable substitution, command substitution, arithmetic substitution, | |
238 | string expansion, process substitution, and quote removal in | |
239 | decode_prompt_string. */ | |
240 | int promptvars = 1; | |
241 | ||
d3a24ed2 CR |
242 | /* If non-zero, $'...' and $"..." are expanded when they appear within |
243 | a ${...} expansion, even when the expansion appears within double | |
244 | quotes. */ | |
245 | int extended_quote = 1; | |
246 | ||
726f6388 JA |
247 | /* The decoded prompt string. Used if READLINE is not defined or if |
248 | editing is turned off. Analogous to current_readline_prompt. */ | |
249 | static char *current_decoded_prompt; | |
250 | ||
251 | /* The number of lines read from input while creating the current command. */ | |
ccc6cda3 | 252 | int current_command_line_count; |
726f6388 JA |
253 | |
254 | /* Variables to manage the task of reading here documents, because we need to | |
255 | defer the reading until after a complete command has been collected. */ | |
256 | static REDIRECT *redir_stack[10]; | |
ccc6cda3 | 257 | int need_here_doc; |
726f6388 JA |
258 | |
259 | /* Where shell input comes from. History expansion is performed on each | |
260 | line when the shell is interactive. */ | |
261 | static char *shell_input_line = (char *)NULL; | |
ccc6cda3 JA |
262 | static int shell_input_line_index; |
263 | static int shell_input_line_size; /* Amount allocated for shell_input_line. */ | |
264 | static int shell_input_line_len; /* strlen (shell_input_line) */ | |
726f6388 JA |
265 | |
266 | /* Either zero or EOF. */ | |
ccc6cda3 JA |
267 | static int shell_input_line_terminator; |
268 | ||
269 | /* The line number in a script on which a function definition starts. */ | |
270 | static int function_dstart; | |
271 | ||
272 | /* The line number in a script on which a function body starts. */ | |
273 | static int function_bstart; | |
726f6388 | 274 | |
bb70624e JA |
275 | /* The line number in a script at which an arithmetic for command starts. */ |
276 | static int arith_for_lineno; | |
277 | ||
d3a24ed2 CR |
278 | /* The line number in a script where the word in a `case WORD', `select WORD' |
279 | or `for WORD' begins. This is a nested command maximum, since the array | |
280 | index is decremented after a case, select, or for command is parsed. */ | |
281 | #define MAX_CASE_NEST 128 | |
282 | static int word_lineno[MAX_CASE_NEST]; | |
283 | static int word_top = -1; | |
284 | ||
5e13499c CR |
285 | /* If non-zero, it is the token that we want read_token to return |
286 | regardless of what text is (or isn't) present to be read. This | |
287 | is reset by read_token. If token_to_read == WORD or | |
288 | ASSIGNMENT_WORD, yylval.word should be set to word_desc_to_read. */ | |
289 | static int token_to_read; | |
290 | static WORD_DESC *word_desc_to_read; | |
291 | ||
726f6388 JA |
292 | static REDIRECTEE redir; |
293 | %} | |
294 | ||
295 | %union { | |
296 | WORD_DESC *word; /* the word that we read. */ | |
297 | int number; /* the number that we read. */ | |
298 | WORD_LIST *word_list; | |
299 | COMMAND *command; | |
300 | REDIRECT *redirect; | |
301 | ELEMENT element; | |
302 | PATTERN_LIST *pattern; | |
303 | } | |
304 | ||
305 | /* Reserved words. Members of the first group are only recognized | |
306 | in the case that they are preceded by a list_terminator. Members | |
cce855bc JA |
307 | of the second group are for [[...]] commands. Members of the |
308 | third group are recognized only under special circumstances. */ | |
726f6388 | 309 | %token IF THEN ELSE ELIF FI CASE ESAC FOR SELECT WHILE UNTIL DO DONE FUNCTION |
cce855bc | 310 | %token COND_START COND_END COND_ERROR |
bb70624e | 311 | %token IN BANG TIME TIMEOPT |
726f6388 JA |
312 | |
313 | /* More general tokens. yylex () knows how to make these. */ | |
314 | %token <word> WORD ASSIGNMENT_WORD | |
315 | %token <number> NUMBER | |
bb70624e | 316 | %token <word_list> ARITH_CMD ARITH_FOR_EXPRS |
cce855bc | 317 | %token <command> COND_CMD |
7117c2d2 | 318 | %token AND_AND OR_OR GREATER_GREATER LESS_LESS LESS_AND LESS_LESS_LESS |
726f6388 JA |
319 | %token GREATER_AND SEMI_SEMI LESS_LESS_MINUS AND_GREATER LESS_GREATER |
320 | %token GREATER_BAR | |
321 | ||
322 | /* The types that the various syntactical units return. */ | |
323 | ||
ccc6cda3 JA |
324 | %type <command> inputunit command pipeline pipeline_command |
325 | %type <command> list list0 list1 compound_list simple_list simple_list1 | |
326 | %type <command> simple_command shell_command | |
327 | %type <command> for_command select_command case_command group_command | |
cce855bc JA |
328 | %type <command> arith_command |
329 | %type <command> cond_command | |
bb70624e | 330 | %type <command> arith_for_command |
28ef6c31 | 331 | %type <command> function_def function_body if_command elif_clause subshell |
ccc6cda3 | 332 | %type <redirect> redirection redirection_list |
726f6388 | 333 | %type <element> simple_command_element |
ccc6cda3 JA |
334 | %type <word_list> word_list pattern |
335 | %type <pattern> pattern_list case_clause_sequence case_clause | |
336 | %type <number> timespec | |
5e13499c | 337 | %type <number> list_terminator |
726f6388 JA |
338 | |
339 | %start inputunit | |
340 | ||
341 | %left '&' ';' '\n' yacc_EOF | |
342 | %left AND_AND OR_OR | |
343 | %right '|' | |
344 | %% | |
345 | ||
7117c2d2 | 346 | inputunit: simple_list simple_list_terminator |
726f6388 JA |
347 | { |
348 | /* Case of regular command. Discard the error | |
349 | safety net,and return the command just parsed. */ | |
350 | global_command = $1; | |
351 | eof_encountered = 0; | |
7117c2d2 | 352 | /* discard_parser_constructs (0); */ |
726f6388 JA |
353 | YYACCEPT; |
354 | } | |
355 | | '\n' | |
356 | { | |
357 | /* Case of regular command, but not a very | |
358 | interesting one. Return a NULL command. */ | |
359 | global_command = (COMMAND *)NULL; | |
360 | YYACCEPT; | |
361 | } | |
ccc6cda3 | 362 | | error '\n' |
726f6388 JA |
363 | { |
364 | /* Error during parsing. Return NULL command. */ | |
365 | global_command = (COMMAND *)NULL; | |
366 | eof_encountered = 0; | |
7117c2d2 | 367 | /* discard_parser_constructs (1); */ |
726f6388 JA |
368 | if (interactive) |
369 | { | |
370 | YYACCEPT; | |
371 | } | |
372 | else | |
373 | { | |
374 | YYABORT; | |
375 | } | |
376 | } | |
377 | | yacc_EOF | |
378 | { | |
ccc6cda3 | 379 | /* Case of EOF seen by itself. Do ignoreeof or |
726f6388 JA |
380 | not. */ |
381 | global_command = (COMMAND *)NULL; | |
382 | handle_eof_input_unit (); | |
383 | YYACCEPT; | |
384 | } | |
385 | ; | |
386 | ||
ccc6cda3 JA |
387 | word_list: WORD |
388 | { $$ = make_word_list ($1, (WORD_LIST *)NULL); } | |
389 | | word_list WORD | |
726f6388 JA |
390 | { $$ = make_word_list ($2, $1); } |
391 | ; | |
392 | ||
393 | redirection: '>' WORD | |
394 | { | |
395 | redir.filename = $2; | |
396 | $$ = make_redirection (1, r_output_direction, redir); | |
397 | } | |
398 | | '<' WORD | |
399 | { | |
400 | redir.filename = $2; | |
401 | $$ = make_redirection (0, r_input_direction, redir); | |
402 | } | |
403 | | NUMBER '>' WORD | |
404 | { | |
405 | redir.filename = $3; | |
406 | $$ = make_redirection ($1, r_output_direction, redir); | |
407 | } | |
408 | | NUMBER '<' WORD | |
409 | { | |
410 | redir.filename = $3; | |
411 | $$ = make_redirection ($1, r_input_direction, redir); | |
412 | } | |
413 | | GREATER_GREATER WORD | |
414 | { | |
415 | redir.filename = $2; | |
416 | $$ = make_redirection (1, r_appending_to, redir); | |
417 | } | |
418 | | NUMBER GREATER_GREATER WORD | |
419 | { | |
420 | redir.filename = $3; | |
421 | $$ = make_redirection ($1, r_appending_to, redir); | |
422 | } | |
423 | | LESS_LESS WORD | |
424 | { | |
425 | redir.filename = $2; | |
426 | $$ = make_redirection (0, r_reading_until, redir); | |
427 | redir_stack[need_here_doc++] = $$; | |
428 | } | |
429 | | NUMBER LESS_LESS WORD | |
430 | { | |
431 | redir.filename = $3; | |
432 | $$ = make_redirection ($1, r_reading_until, redir); | |
433 | redir_stack[need_here_doc++] = $$; | |
434 | } | |
7117c2d2 JA |
435 | | LESS_LESS_LESS WORD |
436 | { | |
437 | redir.filename = $2; | |
438 | $$ = make_redirection (0, r_reading_string, redir); | |
439 | } | |
440 | | NUMBER LESS_LESS_LESS WORD | |
441 | { | |
442 | redir.filename = $3; | |
443 | $$ = make_redirection ($1, r_reading_string, redir); | |
444 | } | |
726f6388 JA |
445 | | LESS_AND NUMBER |
446 | { | |
447 | redir.dest = $2; | |
448 | $$ = make_redirection (0, r_duplicating_input, redir); | |
449 | } | |
450 | | NUMBER LESS_AND NUMBER | |
451 | { | |
452 | redir.dest = $3; | |
453 | $$ = make_redirection ($1, r_duplicating_input, redir); | |
454 | } | |
455 | | GREATER_AND NUMBER | |
456 | { | |
457 | redir.dest = $2; | |
458 | $$ = make_redirection (1, r_duplicating_output, redir); | |
459 | } | |
460 | | NUMBER GREATER_AND NUMBER | |
461 | { | |
462 | redir.dest = $3; | |
463 | $$ = make_redirection ($1, r_duplicating_output, redir); | |
464 | } | |
465 | | LESS_AND WORD | |
466 | { | |
467 | redir.filename = $2; | |
468 | $$ = make_redirection (0, r_duplicating_input_word, redir); | |
469 | } | |
470 | | NUMBER LESS_AND WORD | |
471 | { | |
472 | redir.filename = $3; | |
473 | $$ = make_redirection ($1, r_duplicating_input_word, redir); | |
474 | } | |
475 | | GREATER_AND WORD | |
476 | { | |
477 | redir.filename = $2; | |
478 | $$ = make_redirection (1, r_duplicating_output_word, redir); | |
479 | } | |
480 | | NUMBER GREATER_AND WORD | |
481 | { | |
482 | redir.filename = $3; | |
483 | $$ = make_redirection ($1, r_duplicating_output_word, redir); | |
484 | } | |
485 | | LESS_LESS_MINUS WORD | |
486 | { | |
487 | redir.filename = $2; | |
488 | $$ = make_redirection | |
489 | (0, r_deblank_reading_until, redir); | |
490 | redir_stack[need_here_doc++] = $$; | |
491 | } | |
492 | | NUMBER LESS_LESS_MINUS WORD | |
493 | { | |
494 | redir.filename = $3; | |
495 | $$ = make_redirection | |
496 | ($1, r_deblank_reading_until, redir); | |
497 | redir_stack[need_here_doc++] = $$; | |
498 | } | |
499 | | GREATER_AND '-' | |
500 | { | |
f73dda09 | 501 | redir.dest = 0; |
726f6388 JA |
502 | $$ = make_redirection (1, r_close_this, redir); |
503 | } | |
504 | | NUMBER GREATER_AND '-' | |
505 | { | |
f73dda09 | 506 | redir.dest = 0; |
726f6388 JA |
507 | $$ = make_redirection ($1, r_close_this, redir); |
508 | } | |
509 | | LESS_AND '-' | |
510 | { | |
f73dda09 | 511 | redir.dest = 0; |
726f6388 JA |
512 | $$ = make_redirection (0, r_close_this, redir); |
513 | } | |
514 | | NUMBER LESS_AND '-' | |
515 | { | |
f73dda09 | 516 | redir.dest = 0; |
726f6388 JA |
517 | $$ = make_redirection ($1, r_close_this, redir); |
518 | } | |
519 | | AND_GREATER WORD | |
520 | { | |
521 | redir.filename = $2; | |
522 | $$ = make_redirection (1, r_err_and_out, redir); | |
523 | } | |
524 | | NUMBER LESS_GREATER WORD | |
525 | { | |
526 | redir.filename = $3; | |
527 | $$ = make_redirection ($1, r_input_output, redir); | |
528 | } | |
529 | | LESS_GREATER WORD | |
530 | { | |
726f6388 | 531 | redir.filename = $2; |
ccc6cda3 JA |
532 | $$ = make_redirection (0, r_input_output, redir); |
533 | } | |
726f6388 JA |
534 | | GREATER_BAR WORD |
535 | { | |
536 | redir.filename = $2; | |
537 | $$ = make_redirection (1, r_output_force, redir); | |
538 | } | |
539 | | NUMBER GREATER_BAR WORD | |
540 | { | |
541 | redir.filename = $3; | |
542 | $$ = make_redirection ($1, r_output_force, redir); | |
543 | } | |
544 | ; | |
545 | ||
546 | simple_command_element: WORD | |
547 | { $$.word = $1; $$.redirect = 0; } | |
548 | | ASSIGNMENT_WORD | |
549 | { $$.word = $1; $$.redirect = 0; } | |
550 | | redirection | |
551 | { $$.redirect = $1; $$.word = 0; } | |
552 | ; | |
553 | ||
ccc6cda3 | 554 | redirection_list: redirection |
726f6388 JA |
555 | { |
556 | $$ = $1; | |
557 | } | |
ccc6cda3 JA |
558 | | redirection_list redirection |
559 | { | |
560 | register REDIRECT *t; | |
726f6388 | 561 | |
ccc6cda3 JA |
562 | for (t = $1; t->next; t = t->next) |
563 | ; | |
564 | t->next = $2; | |
726f6388 JA |
565 | $$ = $1; |
566 | } | |
567 | ; | |
568 | ||
569 | simple_command: simple_command_element | |
570 | { $$ = make_simple_command ($1, (COMMAND *)NULL); } | |
571 | | simple_command simple_command_element | |
572 | { $$ = make_simple_command ($2, $1); } | |
573 | ; | |
574 | ||
575 | command: simple_command | |
576 | { $$ = clean_simple_command ($1); } | |
577 | | shell_command | |
578 | { $$ = $1; } | |
ccc6cda3 | 579 | | shell_command redirection_list |
726f6388 | 580 | { |
ccc6cda3 JA |
581 | COMMAND *tc; |
582 | ||
583 | tc = $1; | |
ccc6cda3 | 584 | if (tc->redirects) |
726f6388 JA |
585 | { |
586 | register REDIRECT *t; | |
ccc6cda3 | 587 | for (t = tc->redirects; t->next; t = t->next) |
726f6388 JA |
588 | ; |
589 | t->next = $2; | |
590 | } | |
591 | else | |
ccc6cda3 | 592 | tc->redirects = $2; |
726f6388 JA |
593 | $$ = $1; |
594 | } | |
28ef6c31 JA |
595 | | function_def |
596 | { $$ = $1; } | |
726f6388 JA |
597 | ; |
598 | ||
ccc6cda3 JA |
599 | shell_command: for_command |
600 | { $$ = $1; } | |
601 | | case_command | |
602 | { $$ = $1; } | |
603 | | WHILE compound_list DO compound_list DONE | |
726f6388 | 604 | { $$ = make_while_command ($2, $4); } |
ccc6cda3 | 605 | | UNTIL compound_list DO compound_list DONE |
726f6388 JA |
606 | { $$ = make_until_command ($2, $4); } |
607 | | select_command | |
608 | { $$ = $1; } | |
609 | | if_command | |
610 | { $$ = $1; } | |
611 | | subshell | |
612 | { $$ = $1; } | |
613 | | group_command | |
614 | { $$ = $1; } | |
cce855bc JA |
615 | | arith_command |
616 | { $$ = $1; } | |
617 | | cond_command | |
618 | { $$ = $1; } | |
bb70624e JA |
619 | | arith_for_command |
620 | { $$ = $1; } | |
726f6388 JA |
621 | ; |
622 | ||
d166f048 | 623 | for_command: FOR WORD newline_list DO compound_list DONE |
d3a24ed2 CR |
624 | { |
625 | $$ = make_for_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $5, word_lineno[word_top]); | |
626 | if (word_top > 0) word_top--; | |
627 | } | |
d166f048 | 628 | | FOR WORD newline_list '{' compound_list '}' |
d3a24ed2 CR |
629 | { |
630 | $$ = make_for_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $5, word_lineno[word_top]); | |
631 | if (word_top > 0) word_top--; | |
632 | } | |
d166f048 | 633 | | FOR WORD ';' newline_list DO compound_list DONE |
d3a24ed2 CR |
634 | { |
635 | $$ = make_for_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $6, word_lineno[word_top]); | |
636 | if (word_top > 0) word_top--; | |
637 | } | |
d166f048 | 638 | | FOR WORD ';' newline_list '{' compound_list '}' |
d3a24ed2 CR |
639 | { |
640 | $$ = make_for_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $6, word_lineno[word_top]); | |
641 | if (word_top > 0) word_top--; | |
642 | } | |
d166f048 | 643 | | FOR WORD newline_list IN word_list list_terminator newline_list DO compound_list DONE |
d3a24ed2 CR |
644 | { |
645 | $$ = make_for_command ($2, REVERSE_LIST ($5, WORD_LIST *), $9, word_lineno[word_top]); | |
646 | if (word_top > 0) word_top--; | |
647 | } | |
d166f048 | 648 | | FOR WORD newline_list IN word_list list_terminator newline_list '{' compound_list '}' |
d3a24ed2 CR |
649 | { |
650 | $$ = make_for_command ($2, REVERSE_LIST ($5, WORD_LIST *), $9, word_lineno[word_top]); | |
651 | if (word_top > 0) word_top--; | |
652 | } | |
f73dda09 | 653 | | FOR WORD newline_list IN list_terminator newline_list DO compound_list DONE |
d3a24ed2 CR |
654 | { |
655 | $$ = make_for_command ($2, (WORD_LIST *)NULL, $8, word_lineno[word_top]); | |
656 | if (word_top > 0) word_top--; | |
657 | } | |
f73dda09 | 658 | | FOR WORD newline_list IN list_terminator newline_list '{' compound_list '}' |
d3a24ed2 CR |
659 | { |
660 | $$ = make_for_command ($2, (WORD_LIST *)NULL, $8, word_lineno[word_top]); | |
661 | if (word_top > 0) word_top--; | |
662 | } | |
ccc6cda3 JA |
663 | ; |
664 | ||
bb70624e | 665 | arith_for_command: FOR ARITH_FOR_EXPRS list_terminator newline_list DO compound_list DONE |
d3a24ed2 CR |
666 | { |
667 | $$ = make_arith_for_command ($2, $6, arith_for_lineno); | |
668 | if (word_top > 0) word_top--; | |
669 | } | |
bb70624e | 670 | | FOR ARITH_FOR_EXPRS list_terminator newline_list '{' compound_list '}' |
d3a24ed2 CR |
671 | { |
672 | $$ = make_arith_for_command ($2, $6, arith_for_lineno); | |
673 | if (word_top > 0) word_top--; | |
674 | } | |
28ef6c31 | 675 | | FOR ARITH_FOR_EXPRS DO compound_list DONE |
d3a24ed2 CR |
676 | { |
677 | $$ = make_arith_for_command ($2, $4, arith_for_lineno); | |
678 | if (word_top > 0) word_top--; | |
679 | } | |
28ef6c31 | 680 | | FOR ARITH_FOR_EXPRS '{' compound_list '}' |
d3a24ed2 CR |
681 | { |
682 | $$ = make_arith_for_command ($2, $4, arith_for_lineno); | |
683 | if (word_top > 0) word_top--; | |
684 | } | |
bb70624e | 685 | ; |
28ef6c31 | 686 | |
ccc6cda3 | 687 | select_command: SELECT WORD newline_list DO list DONE |
726f6388 | 688 | { |
d3a24ed2 CR |
689 | $$ = make_select_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $5, word_lineno[word_top]); |
690 | if (word_top > 0) word_top--; | |
726f6388 | 691 | } |
ccc6cda3 | 692 | | SELECT WORD newline_list '{' list '}' |
726f6388 | 693 | { |
d3a24ed2 CR |
694 | $$ = make_select_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $5, word_lineno[word_top]); |
695 | if (word_top > 0) word_top--; | |
726f6388 | 696 | } |
ccc6cda3 | 697 | | SELECT WORD ';' newline_list DO list DONE |
726f6388 | 698 | { |
d3a24ed2 CR |
699 | $$ = make_select_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $6, word_lineno[word_top]); |
700 | if (word_top > 0) word_top--; | |
726f6388 | 701 | } |
ccc6cda3 | 702 | | SELECT WORD ';' newline_list '{' list '}' |
726f6388 | 703 | { |
d3a24ed2 CR |
704 | $$ = make_select_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $6, word_lineno[word_top]); |
705 | if (word_top > 0) word_top--; | |
726f6388 | 706 | } |
ccc6cda3 | 707 | | SELECT WORD newline_list IN word_list list_terminator newline_list DO list DONE |
726f6388 | 708 | { |
d3a24ed2 CR |
709 | $$ = make_select_command ($2, REVERSE_LIST ($5, WORD_LIST *), $9, word_lineno[word_top]); |
710 | if (word_top > 0) word_top--; | |
726f6388 | 711 | } |
ccc6cda3 | 712 | | SELECT WORD newline_list IN word_list list_terminator newline_list '{' list '}' |
726f6388 | 713 | { |
d3a24ed2 CR |
714 | $$ = make_select_command ($2, REVERSE_LIST ($5, WORD_LIST *), $9, word_lineno[word_top]); |
715 | if (word_top > 0) word_top--; | |
726f6388 JA |
716 | } |
717 | ; | |
718 | ||
ccc6cda3 | 719 | case_command: CASE WORD newline_list IN newline_list ESAC |
d3a24ed2 CR |
720 | { |
721 | $$ = make_case_command ($2, (PATTERN_LIST *)NULL, word_lineno[word_top]); | |
722 | if (word_top > 0) word_top--; | |
723 | } | |
ccc6cda3 | 724 | | CASE WORD newline_list IN case_clause_sequence newline_list ESAC |
d3a24ed2 CR |
725 | { |
726 | $$ = make_case_command ($2, $5, word_lineno[word_top]); | |
727 | if (word_top > 0) word_top--; | |
728 | } | |
ccc6cda3 | 729 | | CASE WORD newline_list IN case_clause ESAC |
d3a24ed2 CR |
730 | { |
731 | $$ = make_case_command ($2, $5, word_lineno[word_top]); | |
732 | if (word_top > 0) word_top--; | |
733 | } | |
ccc6cda3 | 734 | ; |
726f6388 | 735 | |
28ef6c31 | 736 | function_def: WORD '(' ')' newline_list function_body |
ccc6cda3 | 737 | { $$ = make_function_def ($1, $5, function_dstart, function_bstart); } |
726f6388 | 738 | |
28ef6c31 | 739 | | FUNCTION WORD '(' ')' newline_list function_body |
ccc6cda3 | 740 | { $$ = make_function_def ($2, $6, function_dstart, function_bstart); } |
726f6388 | 741 | |
28ef6c31 | 742 | | FUNCTION WORD newline_list function_body |
ccc6cda3 | 743 | { $$ = make_function_def ($2, $4, function_dstart, function_bstart); } |
726f6388 JA |
744 | ; |
745 | ||
28ef6c31 JA |
746 | |
747 | function_body: shell_command | |
748 | { $$ = $1; } | |
749 | | shell_command redirection_list | |
750 | { | |
751 | COMMAND *tc; | |
752 | ||
753 | tc = $1; | |
754 | /* According to Posix.2 3.9.5, redirections | |
755 | specified after the body of a function should | |
756 | be attached to the function and performed when | |
757 | the function is executed, not as part of the | |
758 | function definition command. */ | |
759 | /* XXX - I don't think it matters, but we might | |
760 | want to change this in the future to avoid | |
761 | problems differentiating between a function | |
762 | definition with a redirection and a function | |
763 | definition containing a single command with a | |
764 | redirection. The two are semantically equivalent, | |
765 | though -- the only difference is in how the | |
766 | command printing code displays the redirections. */ | |
767 | if (tc->redirects) | |
768 | { | |
769 | register REDIRECT *t; | |
770 | for (t = tc->redirects; t->next; t = t->next) | |
771 | ; | |
772 | t->next = $2; | |
773 | } | |
774 | else | |
775 | tc->redirects = $2; | |
776 | $$ = $1; | |
777 | } | |
778 | ; | |
779 | ||
ccc6cda3 | 780 | subshell: '(' compound_list ')' |
bb70624e JA |
781 | { |
782 | $$ = make_subshell_command ($2); | |
783 | $$->flags |= CMD_WANT_SUBSHELL; | |
784 | } | |
726f6388 | 785 | ; |
ccc6cda3 JA |
786 | |
787 | if_command: IF compound_list THEN compound_list FI | |
726f6388 | 788 | { $$ = make_if_command ($2, $4, (COMMAND *)NULL); } |
ccc6cda3 | 789 | | IF compound_list THEN compound_list ELSE compound_list FI |
726f6388 | 790 | { $$ = make_if_command ($2, $4, $6); } |
ccc6cda3 | 791 | | IF compound_list THEN compound_list elif_clause FI |
726f6388 JA |
792 | { $$ = make_if_command ($2, $4, $5); } |
793 | ; | |
794 | ||
795 | ||
28ef6c31 | 796 | group_command: '{' compound_list '}' |
726f6388 JA |
797 | { $$ = make_group_command ($2); } |
798 | ; | |
799 | ||
cce855bc JA |
800 | arith_command: ARITH_CMD |
801 | { $$ = make_arith_command ($1); } | |
802 | ; | |
803 | ||
804 | cond_command: COND_START COND_CMD COND_END | |
805 | { $$ = $2; } | |
806 | ; | |
807 | ||
ccc6cda3 | 808 | elif_clause: ELIF compound_list THEN compound_list |
726f6388 | 809 | { $$ = make_if_command ($2, $4, (COMMAND *)NULL); } |
ccc6cda3 | 810 | | ELIF compound_list THEN compound_list ELSE compound_list |
726f6388 | 811 | { $$ = make_if_command ($2, $4, $6); } |
ccc6cda3 | 812 | | ELIF compound_list THEN compound_list elif_clause |
726f6388 JA |
813 | { $$ = make_if_command ($2, $4, $5); } |
814 | ; | |
815 | ||
ccc6cda3 JA |
816 | case_clause: pattern_list |
817 | | case_clause_sequence pattern_list | |
726f6388 JA |
818 | { $2->next = $1; $$ = $2; } |
819 | ; | |
820 | ||
ccc6cda3 | 821 | pattern_list: newline_list pattern ')' compound_list |
726f6388 | 822 | { $$ = make_pattern_list ($2, $4); } |
ccc6cda3 | 823 | | newline_list pattern ')' newline_list |
726f6388 | 824 | { $$ = make_pattern_list ($2, (COMMAND *)NULL); } |
ccc6cda3 | 825 | | newline_list '(' pattern ')' compound_list |
726f6388 | 826 | { $$ = make_pattern_list ($3, $5); } |
ccc6cda3 | 827 | | newline_list '(' pattern ')' newline_list |
726f6388 JA |
828 | { $$ = make_pattern_list ($3, (COMMAND *)NULL); } |
829 | ; | |
830 | ||
ccc6cda3 JA |
831 | case_clause_sequence: pattern_list SEMI_SEMI |
832 | | case_clause_sequence pattern_list SEMI_SEMI | |
726f6388 JA |
833 | { $2->next = $1; $$ = $2; } |
834 | ; | |
835 | ||
726f6388 JA |
836 | pattern: WORD |
837 | { $$ = make_word_list ($1, (WORD_LIST *)NULL); } | |
838 | | pattern '|' WORD | |
839 | { $$ = make_word_list ($3, $1); } | |
840 | ; | |
841 | ||
842 | /* A list allows leading or trailing newlines and | |
843 | newlines as operators (equivalent to semicolons). | |
844 | It must end with a newline or semicolon. | |
845 | Lists are used within commands such as if, for, while. */ | |
846 | ||
ccc6cda3 | 847 | list: newline_list list0 |
726f6388 JA |
848 | { |
849 | $$ = $2; | |
850 | if (need_here_doc) | |
851 | gather_here_documents (); | |
852 | } | |
853 | ; | |
854 | ||
ccc6cda3 JA |
855 | compound_list: list |
856 | | newline_list list1 | |
857 | { | |
858 | $$ = $2; | |
859 | } | |
860 | ; | |
861 | ||
862 | list0: list1 '\n' newline_list | |
863 | | list1 '&' newline_list | |
726f6388 JA |
864 | { |
865 | if ($1->type == cm_connection) | |
866 | $$ = connect_async_list ($1, (COMMAND *)NULL, '&'); | |
867 | else | |
868 | $$ = command_connect ($1, (COMMAND *)NULL, '&'); | |
869 | } | |
ccc6cda3 | 870 | | list1 ';' newline_list |
726f6388 JA |
871 | |
872 | ; | |
873 | ||
ccc6cda3 | 874 | list1: list1 AND_AND newline_list list1 |
726f6388 | 875 | { $$ = command_connect ($1, $4, AND_AND); } |
ccc6cda3 | 876 | | list1 OR_OR newline_list list1 |
726f6388 | 877 | { $$ = command_connect ($1, $4, OR_OR); } |
ccc6cda3 | 878 | | list1 '&' newline_list list1 |
726f6388 JA |
879 | { |
880 | if ($1->type == cm_connection) | |
881 | $$ = connect_async_list ($1, $4, '&'); | |
882 | else | |
883 | $$ = command_connect ($1, $4, '&'); | |
884 | } | |
ccc6cda3 | 885 | | list1 ';' newline_list list1 |
726f6388 | 886 | { $$ = command_connect ($1, $4, ';'); } |
ccc6cda3 | 887 | | list1 '\n' newline_list list1 |
726f6388 | 888 | { $$ = command_connect ($1, $4, ';'); } |
ccc6cda3 | 889 | | pipeline_command |
726f6388 | 890 | { $$ = $1; } |
726f6388 JA |
891 | ; |
892 | ||
7117c2d2 JA |
893 | simple_list_terminator: '\n' |
894 | | yacc_EOF | |
895 | ; | |
896 | ||
726f6388 | 897 | list_terminator:'\n' |
5e13499c | 898 | { $$ = '\n'; } |
726f6388 | 899 | | ';' |
5e13499c | 900 | { $$ = ';'; } |
726f6388 | 901 | | yacc_EOF |
5e13499c | 902 | { $$ = yacc_EOF; } |
726f6388 JA |
903 | ; |
904 | ||
ccc6cda3 JA |
905 | newline_list: |
906 | | newline_list '\n' | |
726f6388 JA |
907 | ; |
908 | ||
909 | /* A simple_list is a list that contains no significant newlines | |
910 | and no leading or trailing newlines. Newlines are allowed | |
911 | only following operators, where they are not significant. | |
912 | ||
913 | This is what an inputunit consists of. */ | |
914 | ||
915 | simple_list: simple_list1 | |
916 | { | |
917 | $$ = $1; | |
918 | if (need_here_doc) | |
919 | gather_here_documents (); | |
920 | } | |
921 | | simple_list1 '&' | |
922 | { | |
923 | if ($1->type == cm_connection) | |
924 | $$ = connect_async_list ($1, (COMMAND *)NULL, '&'); | |
925 | else | |
926 | $$ = command_connect ($1, (COMMAND *)NULL, '&'); | |
927 | if (need_here_doc) | |
928 | gather_here_documents (); | |
929 | } | |
930 | | simple_list1 ';' | |
931 | { | |
932 | $$ = $1; | |
933 | if (need_here_doc) | |
934 | gather_here_documents (); | |
935 | } | |
936 | ; | |
937 | ||
ccc6cda3 | 938 | simple_list1: simple_list1 AND_AND newline_list simple_list1 |
726f6388 | 939 | { $$ = command_connect ($1, $4, AND_AND); } |
ccc6cda3 | 940 | | simple_list1 OR_OR newline_list simple_list1 |
726f6388 JA |
941 | { $$ = command_connect ($1, $4, OR_OR); } |
942 | | simple_list1 '&' simple_list1 | |
943 | { | |
944 | if ($1->type == cm_connection) | |
945 | $$ = connect_async_list ($1, $3, '&'); | |
946 | else | |
947 | $$ = command_connect ($1, $3, '&'); | |
948 | } | |
949 | | simple_list1 ';' simple_list1 | |
950 | { $$ = command_connect ($1, $3, ';'); } | |
ccc6cda3 JA |
951 | |
952 | | pipeline_command | |
953 | { $$ = $1; } | |
954 | ; | |
955 | ||
956 | pipeline_command: pipeline | |
726f6388 JA |
957 | { $$ = $1; } |
958 | | BANG pipeline | |
959 | { | |
453f278a CR |
960 | if ($2) |
961 | $2->flags |= CMD_INVERT_RETURN; | |
726f6388 JA |
962 | $$ = $2; |
963 | } | |
ccc6cda3 JA |
964 | | timespec pipeline |
965 | { | |
453f278a CR |
966 | if ($2) |
967 | $2->flags |= $1; | |
ccc6cda3 JA |
968 | $$ = $2; |
969 | } | |
970 | | timespec BANG pipeline | |
971 | { | |
453f278a CR |
972 | if ($3) |
973 | $3->flags |= $1|CMD_INVERT_RETURN; | |
ccc6cda3 JA |
974 | $$ = $3; |
975 | } | |
976 | | BANG timespec pipeline | |
977 | { | |
453f278a CR |
978 | if ($3) |
979 | $3->flags |= $2|CMD_INVERT_RETURN; | |
ccc6cda3 JA |
980 | $$ = $3; |
981 | } | |
5e13499c CR |
982 | | timespec list_terminator |
983 | { | |
984 | ELEMENT x; | |
985 | ||
986 | /* Boy, this is unclean. `time' by itself can | |
987 | time a null command. We cheat and push a | |
988 | newline back if the list_terminator was a newline | |
989 | to avoid the double-newline problem (one to | |
990 | terminate this, one to terminate the command) */ | |
991 | x.word = 0; | |
992 | x.redirect = 0; | |
993 | $$ = make_simple_command (x, (COMMAND *)NULL); | |
994 | $$->flags |= $1; | |
995 | /* XXX - let's cheat and push a newline back */ | |
996 | if ($2 == '\n') | |
997 | token_to_read = '\n'; | |
998 | } | |
999 | ||
726f6388 JA |
1000 | ; |
1001 | ||
1002 | pipeline: | |
ccc6cda3 | 1003 | pipeline '|' newline_list pipeline |
726f6388 JA |
1004 | { $$ = command_connect ($1, $4, '|'); } |
1005 | | command | |
1006 | { $$ = $1; } | |
1007 | ; | |
ccc6cda3 JA |
1008 | |
1009 | timespec: TIME | |
1010 | { $$ = CMD_TIME_PIPELINE; } | |
1011 | | TIME TIMEOPT | |
1012 | { $$ = CMD_TIME_PIPELINE|CMD_TIME_POSIX; } | |
1013 | ; | |
726f6388 JA |
1014 | %% |
1015 | ||
ccc6cda3 | 1016 | /* Possible states for the parser that require it to do special things. */ |
d3a24ed2 CR |
1017 | #define PST_CASEPAT 0x0001 /* in a case pattern list */ |
1018 | #define PST_ALEXPNEXT 0x0002 /* expand next word for aliases */ | |
1019 | #define PST_ALLOWOPNBRC 0x0004 /* allow open brace for function def */ | |
1020 | #define PST_NEEDCLOSBRC 0x0008 /* need close brace */ | |
1021 | #define PST_DBLPAREN 0x0010 /* double-paren parsing */ | |
1022 | #define PST_SUBSHELL 0x0020 /* ( ... ) subshell */ | |
1023 | #define PST_CMDSUBST 0x0040 /* $( ... ) command substitution */ | |
1024 | #define PST_CASESTMT 0x0080 /* parsing a case statement */ | |
1025 | #define PST_CONDCMD 0x0100 /* parsing a [[...]] command */ | |
1026 | #define PST_CONDEXPR 0x0200 /* parsing the guts of [[...]] */ | |
1027 | #define PST_ARITHFOR 0x0400 /* parsing an arithmetic for command */ | |
1028 | #define PST_ALEXPAND 0x0800 /* OK to expand aliases - unused */ | |
1029 | #define PST_CMDTOKEN 0x1000 /* command token OK - unused */ | |
5e13499c | 1030 | #define PST_COMPASSIGN 0x2000 /* parsing x=(...) compound assignment */ |
301e2142 | 1031 | #define PST_ASSIGNOK 0x4000 /* assignment statement ok in this context */ |
d3ad40de | 1032 | #define PST_REGEXP 0x8000 /* parsing an ERE/BRE as a single word */ |
ccc6cda3 | 1033 | |
726f6388 JA |
1034 | /* Initial size to allocate for tokens, and the |
1035 | amount to grow them by. */ | |
d166f048 | 1036 | #define TOKEN_DEFAULT_INITIAL_SIZE 496 |
726f6388 JA |
1037 | #define TOKEN_DEFAULT_GROW_SIZE 512 |
1038 | ||
d3a24ed2 CR |
1039 | /* Should we call prompt_again? */ |
1040 | #define SHOULD_PROMPT() \ | |
1041 | (interactive && (bash_input.type == st_stdin || bash_input.type == st_stream)) | |
1042 | ||
1043 | #if defined (ALIAS) | |
1044 | # define expanding_alias() (pushed_string_list && pushed_string_list->expander) | |
1045 | #else | |
1046 | # define expanding_alias() 0 | |
1047 | #endif | |
1048 | ||
726f6388 | 1049 | /* The token currently being read. */ |
ccc6cda3 | 1050 | static int current_token; |
726f6388 JA |
1051 | |
1052 | /* The last read token, or NULL. read_token () uses this for context | |
1053 | checking. */ | |
ccc6cda3 | 1054 | static int last_read_token; |
726f6388 JA |
1055 | |
1056 | /* The token read prior to last_read_token. */ | |
ccc6cda3 JA |
1057 | static int token_before_that; |
1058 | ||
1059 | /* The token read prior to token_before_that. */ | |
1060 | static int two_tokens_ago; | |
726f6388 | 1061 | |
ccc6cda3 JA |
1062 | /* The current parser state. */ |
1063 | static int parser_state; | |
726f6388 JA |
1064 | |
1065 | /* Global var is non-zero when end of file has been reached. */ | |
1066 | int EOF_Reached = 0; | |
1067 | ||
f73dda09 JA |
1068 | #ifdef DEBUG |
1069 | static void | |
ccc6cda3 JA |
1070 | debug_parser (i) |
1071 | int i; | |
1072 | { | |
1073 | #if YYDEBUG != 0 | |
1074 | yydebug = i; | |
1075 | #endif | |
1076 | } | |
f73dda09 | 1077 | #endif |
ccc6cda3 | 1078 | |
726f6388 JA |
1079 | /* yy_getc () returns the next available character from input or EOF. |
1080 | yy_ungetc (c) makes `c' the next character to read. | |
1081 | init_yy_io (get, unget, type, location) makes the function GET the | |
1082 | installed function for getting the next character, makes UNGET the | |
1083 | installed function for un-getting a character, sets the type of stream | |
1084 | (either string or file) from TYPE, and makes LOCATION point to where | |
1085 | the input is coming from. */ | |
1086 | ||
1087 | /* Unconditionally returns end-of-file. */ | |
ccc6cda3 | 1088 | int |
726f6388 JA |
1089 | return_EOF () |
1090 | { | |
1091 | return (EOF); | |
1092 | } | |
1093 | ||
1094 | /* Variable containing the current get and unget functions. | |
1095 | See ./input.h for a clearer description. */ | |
1096 | BASH_INPUT bash_input; | |
1097 | ||
ccc6cda3 JA |
1098 | /* Set all of the fields in BASH_INPUT to NULL. Free bash_input.name if it |
1099 | is non-null, avoiding a memory leak. */ | |
726f6388 JA |
1100 | void |
1101 | initialize_bash_input () | |
1102 | { | |
ccc6cda3 JA |
1103 | bash_input.type = st_none; |
1104 | FREE (bash_input.name); | |
726f6388 JA |
1105 | bash_input.name = (char *)NULL; |
1106 | bash_input.location.file = (FILE *)NULL; | |
1107 | bash_input.location.string = (char *)NULL; | |
f73dda09 JA |
1108 | bash_input.getter = (sh_cget_func_t *)NULL; |
1109 | bash_input.ungetter = (sh_cunget_func_t *)NULL; | |
726f6388 JA |
1110 | } |
1111 | ||
1112 | /* Set the contents of the current bash input stream from | |
1113 | GET, UNGET, TYPE, NAME, and LOCATION. */ | |
1114 | void | |
1115 | init_yy_io (get, unget, type, name, location) | |
f73dda09 JA |
1116 | sh_cget_func_t *get; |
1117 | sh_cunget_func_t *unget; | |
d166f048 | 1118 | enum stream_type type; |
f73dda09 | 1119 | const char *name; |
726f6388 JA |
1120 | INPUT_STREAM location; |
1121 | { | |
1122 | bash_input.type = type; | |
1123 | FREE (bash_input.name); | |
ccc6cda3 | 1124 | bash_input.name = name ? savestring (name) : (char *)NULL; |
726f6388 | 1125 | |
ccc6cda3 | 1126 | /* XXX */ |
726f6388 JA |
1127 | #if defined (CRAY) |
1128 | memcpy((char *)&bash_input.location.string, (char *)&location.string, sizeof(location)); | |
1129 | #else | |
1130 | bash_input.location = location; | |
1131 | #endif | |
1132 | bash_input.getter = get; | |
1133 | bash_input.ungetter = unget; | |
1134 | } | |
1135 | ||
7117c2d2 JA |
1136 | char * |
1137 | yy_input_name () | |
1138 | { | |
1139 | return (bash_input.name ? bash_input.name : "stdin"); | |
1140 | } | |
1141 | ||
726f6388 | 1142 | /* Call this to get the next character of input. */ |
f73dda09 | 1143 | static int |
726f6388 JA |
1144 | yy_getc () |
1145 | { | |
1146 | return (*(bash_input.getter)) (); | |
1147 | } | |
1148 | ||
1149 | /* Call this to unget C. That is, to make C the next character | |
1150 | to be read. */ | |
f73dda09 | 1151 | static int |
726f6388 JA |
1152 | yy_ungetc (c) |
1153 | int c; | |
1154 | { | |
1155 | return (*(bash_input.ungetter)) (c); | |
1156 | } | |
1157 | ||
1158 | #if defined (BUFFERED_INPUT) | |
f73dda09 | 1159 | #ifdef INCLUDE_UNUSED |
726f6388 JA |
1160 | int |
1161 | input_file_descriptor () | |
1162 | { | |
1163 | switch (bash_input.type) | |
1164 | { | |
1165 | case st_stream: | |
1166 | return (fileno (bash_input.location.file)); | |
1167 | case st_bstream: | |
1168 | return (bash_input.location.buffered_fd); | |
ccc6cda3 | 1169 | case st_stdin: |
726f6388 JA |
1170 | default: |
1171 | return (fileno (stdin)); | |
1172 | } | |
1173 | } | |
f73dda09 | 1174 | #endif |
726f6388 JA |
1175 | #endif /* BUFFERED_INPUT */ |
1176 | ||
1177 | /* **************************************************************** */ | |
1178 | /* */ | |
1179 | /* Let input be read from readline (). */ | |
1180 | /* */ | |
1181 | /* **************************************************************** */ | |
1182 | ||
1183 | #if defined (READLINE) | |
1184 | char *current_readline_prompt = (char *)NULL; | |
1185 | char *current_readline_line = (char *)NULL; | |
1186 | int current_readline_line_index = 0; | |
1187 | ||
1188 | static int | |
1189 | yy_readline_get () | |
1190 | { | |
ccc6cda3 | 1191 | SigHandler *old_sigint; |
f73dda09 JA |
1192 | int line_len; |
1193 | unsigned char c; | |
ccc6cda3 | 1194 | |
726f6388 JA |
1195 | if (!current_readline_line) |
1196 | { | |
726f6388 JA |
1197 | if (!bash_readline_initialized) |
1198 | initialize_readline (); | |
1199 | ||
1200 | #if defined (JOB_CONTROL) | |
1201 | if (job_control) | |
28ef6c31 | 1202 | give_terminal_to (shell_pgrp, 0); |
726f6388 JA |
1203 | #endif /* JOB_CONTROL */ |
1204 | ||
f73dda09 | 1205 | old_sigint = (SigHandler *)NULL; |
726f6388 JA |
1206 | if (signal_is_ignored (SIGINT) == 0) |
1207 | { | |
1208 | old_sigint = (SigHandler *)set_signal_handler (SIGINT, sigint_sighandler); | |
1209 | interrupt_immediately++; | |
1210 | } | |
ac18b312 | 1211 | terminate_immediately = 1; |
726f6388 | 1212 | |
ccc6cda3 JA |
1213 | current_readline_line = readline (current_readline_prompt ? |
1214 | current_readline_prompt : ""); | |
726f6388 | 1215 | |
ac18b312 | 1216 | terminate_immediately = 0; |
f73dda09 | 1217 | if (signal_is_ignored (SIGINT) == 0 && old_sigint) |
726f6388 JA |
1218 | { |
1219 | interrupt_immediately--; | |
1220 | set_signal_handler (SIGINT, old_sigint); | |
1221 | } | |
1222 | ||
ccc6cda3 JA |
1223 | #if 0 |
1224 | /* Reset the prompt to the decoded value of prompt_string_pointer. */ | |
726f6388 | 1225 | reset_readline_prompt (); |
ccc6cda3 | 1226 | #endif |
726f6388 | 1227 | |
ccc6cda3 | 1228 | if (current_readline_line == 0) |
726f6388 JA |
1229 | return (EOF); |
1230 | ||
ccc6cda3 | 1231 | current_readline_line_index = 0; |
726f6388 | 1232 | line_len = strlen (current_readline_line); |
ccc6cda3 | 1233 | |
f73dda09 | 1234 | current_readline_line = (char *)xrealloc (current_readline_line, 2 + line_len); |
726f6388 JA |
1235 | current_readline_line[line_len++] = '\n'; |
1236 | current_readline_line[line_len] = '\0'; | |
1237 | } | |
1238 | ||
ccc6cda3 | 1239 | if (current_readline_line[current_readline_line_index] == 0) |
726f6388 JA |
1240 | { |
1241 | free (current_readline_line); | |
1242 | current_readline_line = (char *)NULL; | |
1243 | return (yy_readline_get ()); | |
1244 | } | |
1245 | else | |
1246 | { | |
f73dda09 | 1247 | c = current_readline_line[current_readline_line_index++]; |
726f6388 JA |
1248 | return (c); |
1249 | } | |
1250 | } | |
1251 | ||
1252 | static int | |
1253 | yy_readline_unget (c) | |
ccc6cda3 | 1254 | int c; |
726f6388 JA |
1255 | { |
1256 | if (current_readline_line_index && current_readline_line) | |
1257 | current_readline_line[--current_readline_line_index] = c; | |
1258 | return (c); | |
1259 | } | |
1260 | ||
ccc6cda3 | 1261 | void |
726f6388 JA |
1262 | with_input_from_stdin () |
1263 | { | |
1264 | INPUT_STREAM location; | |
1265 | ||
1266 | if (bash_input.type != st_stdin && stream_on_stack (st_stdin) == 0) | |
1267 | { | |
1268 | location.string = current_readline_line; | |
1269 | init_yy_io (yy_readline_get, yy_readline_unget, | |
1270 | st_stdin, "readline stdin", location); | |
1271 | } | |
1272 | } | |
1273 | ||
1274 | #else /* !READLINE */ | |
1275 | ||
1276 | void | |
1277 | with_input_from_stdin () | |
1278 | { | |
1279 | with_input_from_stream (stdin, "stdin"); | |
1280 | } | |
1281 | #endif /* !READLINE */ | |
1282 | ||
1283 | /* **************************************************************** */ | |
1284 | /* */ | |
1285 | /* Let input come from STRING. STRING is zero terminated. */ | |
1286 | /* */ | |
1287 | /* **************************************************************** */ | |
1288 | ||
1289 | static int | |
1290 | yy_string_get () | |
1291 | { | |
ccc6cda3 | 1292 | register char *string; |
f73dda09 | 1293 | register unsigned char c; |
726f6388 JA |
1294 | |
1295 | string = bash_input.location.string; | |
726f6388 JA |
1296 | |
1297 | /* If the string doesn't exist, or is empty, EOF found. */ | |
1298 | if (string && *string) | |
1299 | { | |
f73dda09 | 1300 | c = *string++; |
726f6388 | 1301 | bash_input.location.string = string; |
f73dda09 | 1302 | return (c); |
726f6388 | 1303 | } |
f73dda09 JA |
1304 | else |
1305 | return (EOF); | |
726f6388 JA |
1306 | } |
1307 | ||
1308 | static int | |
1309 | yy_string_unget (c) | |
1310 | int c; | |
1311 | { | |
1312 | *(--bash_input.location.string) = c; | |
1313 | return (c); | |
1314 | } | |
1315 | ||
1316 | void | |
1317 | with_input_from_string (string, name) | |
f73dda09 JA |
1318 | char *string; |
1319 | const char *name; | |
726f6388 JA |
1320 | { |
1321 | INPUT_STREAM location; | |
1322 | ||
1323 | location.string = string; | |
726f6388 JA |
1324 | init_yy_io (yy_string_get, yy_string_unget, st_string, name, location); |
1325 | } | |
1326 | ||
1327 | /* **************************************************************** */ | |
1328 | /* */ | |
1329 | /* Let input come from STREAM. */ | |
1330 | /* */ | |
1331 | /* **************************************************************** */ | |
1332 | ||
bb70624e JA |
1333 | /* These two functions used to test the value of the HAVE_RESTARTABLE_SYSCALLS |
1334 | define, and just use getc/ungetc if it was defined, but since bash | |
1335 | installs its signal handlers without the SA_RESTART flag, some signals | |
1336 | (like SIGCHLD, SIGWINCH, etc.) received during a read(2) will not cause | |
1337 | the read to be restarted. We need to restart it ourselves. */ | |
1338 | ||
726f6388 JA |
1339 | static int |
1340 | yy_stream_get () | |
1341 | { | |
bb70624e | 1342 | int result; |
726f6388 | 1343 | |
bb70624e | 1344 | result = EOF; |
726f6388 | 1345 | if (bash_input.location.file) |
01ed5ba4 CR |
1346 | { |
1347 | if (interactive) | |
ac18b312 CR |
1348 | { |
1349 | interrupt_immediately++; | |
1350 | terminate_immediately++; | |
1351 | } | |
01ed5ba4 CR |
1352 | result = getc_with_restart (bash_input.location.file); |
1353 | if (interactive) | |
ac18b312 CR |
1354 | { |
1355 | interrupt_immediately--; | |
1356 | terminate_immediately--; | |
1357 | } | |
01ed5ba4 | 1358 | } |
726f6388 JA |
1359 | return (result); |
1360 | } | |
1361 | ||
1362 | static int | |
1363 | yy_stream_unget (c) | |
1364 | int c; | |
1365 | { | |
726f6388 | 1366 | return (ungetc_with_restart (c, bash_input.location.file)); |
726f6388 JA |
1367 | } |
1368 | ||
1369 | void | |
1370 | with_input_from_stream (stream, name) | |
1371 | FILE *stream; | |
f73dda09 | 1372 | const char *name; |
726f6388 JA |
1373 | { |
1374 | INPUT_STREAM location; | |
1375 | ||
1376 | location.file = stream; | |
1377 | init_yy_io (yy_stream_get, yy_stream_unget, st_stream, name, location); | |
1378 | } | |
1379 | ||
1380 | typedef struct stream_saver { | |
1381 | struct stream_saver *next; | |
1382 | BASH_INPUT bash_input; | |
1383 | int line; | |
1384 | #if defined (BUFFERED_INPUT) | |
1385 | BUFFERED_STREAM *bstream; | |
1386 | #endif /* BUFFERED_INPUT */ | |
1387 | } STREAM_SAVER; | |
1388 | ||
1389 | /* The globally known line number. */ | |
1390 | int line_number = 0; | |
1391 | ||
cce855bc JA |
1392 | #if defined (COND_COMMAND) |
1393 | static int cond_lineno; | |
1394 | static int cond_token; | |
1395 | #endif | |
1396 | ||
726f6388 JA |
1397 | STREAM_SAVER *stream_list = (STREAM_SAVER *)NULL; |
1398 | ||
ccc6cda3 JA |
1399 | void |
1400 | push_stream (reset_lineno) | |
1401 | int reset_lineno; | |
726f6388 JA |
1402 | { |
1403 | STREAM_SAVER *saver = (STREAM_SAVER *)xmalloc (sizeof (STREAM_SAVER)); | |
1404 | ||
1405 | xbcopy ((char *)&bash_input, (char *)&(saver->bash_input), sizeof (BASH_INPUT)); | |
1406 | ||
1407 | #if defined (BUFFERED_INPUT) | |
1408 | saver->bstream = (BUFFERED_STREAM *)NULL; | |
1409 | /* If we have a buffered stream, clear out buffers[fd]. */ | |
1410 | if (bash_input.type == st_bstream && bash_input.location.buffered_fd >= 0) | |
cce855bc JA |
1411 | saver->bstream = set_buffered_stream (bash_input.location.buffered_fd, |
1412 | (BUFFERED_STREAM *)NULL); | |
726f6388 JA |
1413 | #endif /* BUFFERED_INPUT */ |
1414 | ||
1415 | saver->line = line_number; | |
1416 | bash_input.name = (char *)NULL; | |
1417 | saver->next = stream_list; | |
1418 | stream_list = saver; | |
ccc6cda3 JA |
1419 | EOF_Reached = 0; |
1420 | if (reset_lineno) | |
1421 | line_number = 0; | |
726f6388 JA |
1422 | } |
1423 | ||
ccc6cda3 | 1424 | void |
726f6388 JA |
1425 | pop_stream () |
1426 | { | |
726f6388 JA |
1427 | if (!stream_list) |
1428 | EOF_Reached = 1; | |
1429 | else | |
1430 | { | |
1431 | STREAM_SAVER *saver = stream_list; | |
1432 | ||
1433 | EOF_Reached = 0; | |
1434 | stream_list = stream_list->next; | |
1435 | ||
1436 | init_yy_io (saver->bash_input.getter, | |
1437 | saver->bash_input.ungetter, | |
1438 | saver->bash_input.type, | |
1439 | saver->bash_input.name, | |
1440 | saver->bash_input.location); | |
1441 | ||
1442 | #if defined (BUFFERED_INPUT) | |
1443 | /* If we have a buffered stream, restore buffers[fd]. */ | |
1444 | /* If the input file descriptor was changed while this was on the | |
1445 | save stack, update the buffered fd to the new file descriptor and | |
1446 | re-establish the buffer <-> bash_input fd correspondence. */ | |
1447 | if (bash_input.type == st_bstream && bash_input.location.buffered_fd >= 0) | |
28ef6c31 JA |
1448 | { |
1449 | if (bash_input_fd_changed) | |
726f6388 JA |
1450 | { |
1451 | bash_input_fd_changed = 0; | |
1452 | if (default_buffered_input >= 0) | |
1453 | { | |
1454 | bash_input.location.buffered_fd = default_buffered_input; | |
1455 | saver->bstream->b_fd = default_buffered_input; | |
28ef6c31 | 1456 | SET_CLOSE_ON_EXEC (default_buffered_input); |
726f6388 JA |
1457 | } |
1458 | } | |
28ef6c31 | 1459 | /* XXX could free buffered stream returned as result here. */ |
cce855bc | 1460 | set_buffered_stream (bash_input.location.buffered_fd, saver->bstream); |
28ef6c31 | 1461 | } |
726f6388 JA |
1462 | #endif /* BUFFERED_INPUT */ |
1463 | ||
1464 | line_number = saver->line; | |
1465 | ||
1466 | FREE (saver->bash_input.name); | |
1467 | free (saver); | |
1468 | } | |
1469 | } | |
1470 | ||
1471 | /* Return 1 if a stream of type TYPE is saved on the stack. */ | |
1472 | int | |
1473 | stream_on_stack (type) | |
ccc6cda3 | 1474 | enum stream_type type; |
726f6388 JA |
1475 | { |
1476 | register STREAM_SAVER *s; | |
ccc6cda3 | 1477 | |
726f6388 JA |
1478 | for (s = stream_list; s; s = s->next) |
1479 | if (s->bash_input.type == type) | |
1480 | return 1; | |
1481 | return 0; | |
1482 | } | |
1483 | ||
bb70624e JA |
1484 | /* Save the current token state and return it in a malloced array. */ |
1485 | int * | |
1486 | save_token_state () | |
1487 | { | |
1488 | int *ret; | |
1489 | ||
1490 | ret = (int *)xmalloc (3 * sizeof (int)); | |
1491 | ret[0] = last_read_token; | |
1492 | ret[1] = token_before_that; | |
1493 | ret[2] = two_tokens_ago; | |
1494 | return ret; | |
1495 | } | |
1496 | ||
1497 | void | |
1498 | restore_token_state (ts) | |
1499 | int *ts; | |
1500 | { | |
1501 | if (ts == 0) | |
1502 | return; | |
1503 | last_read_token = ts[0]; | |
1504 | token_before_that = ts[1]; | |
1505 | two_tokens_ago = ts[2]; | |
1506 | } | |
1507 | ||
726f6388 JA |
1508 | /* |
1509 | * This is used to inhibit alias expansion and reserved word recognition | |
ccc6cda3 JA |
1510 | * inside case statement pattern lists. A `case statement pattern list' is: |
1511 | * | |
726f6388 JA |
1512 | * everything between the `in' in a `case word in' and the next ')' |
1513 | * or `esac' | |
1514 | * everything between a `;;' and the next `)' or `esac' | |
1515 | */ | |
726f6388 | 1516 | |
cce855bc JA |
1517 | #if defined (ALIAS) || defined (DPAREN_ARITHMETIC) |
1518 | ||
ccc6cda3 JA |
1519 | #define END_OF_ALIAS 0 |
1520 | ||
726f6388 JA |
1521 | /* |
1522 | * Pseudo-global variables used in implementing token-wise alias expansion. | |
1523 | */ | |
1524 | ||
726f6388 | 1525 | /* |
ccc6cda3 | 1526 | * Pushing and popping strings. This works together with shell_getc to |
726f6388 JA |
1527 | * implement alias expansion on a per-token basis. |
1528 | */ | |
1529 | ||
1530 | typedef struct string_saver { | |
1531 | struct string_saver *next; | |
1532 | int expand_alias; /* Value to set expand_alias to when string is popped. */ | |
1533 | char *saved_line; | |
cce855bc | 1534 | #if defined (ALIAS) |
ccc6cda3 | 1535 | alias_t *expander; /* alias that caused this line to be pushed. */ |
cce855bc | 1536 | #endif |
726f6388 JA |
1537 | int saved_line_size, saved_line_index, saved_line_terminator; |
1538 | } STRING_SAVER; | |
1539 | ||
1540 | STRING_SAVER *pushed_string_list = (STRING_SAVER *)NULL; | |
1541 | ||
726f6388 JA |
1542 | /* |
1543 | * Push the current shell_input_line onto a stack of such lines and make S | |
1544 | * the current input. Used when expanding aliases. EXPAND is used to set | |
1545 | * the value of expand_next_token when the string is popped, so that the | |
1546 | * word after the alias in the original line is handled correctly when the | |
1547 | * alias expands to multiple words. TOKEN is the token that was expanded | |
1548 | * into S; it is saved and used to prevent infinite recursive expansion. | |
1549 | */ | |
1550 | static void | |
ccc6cda3 | 1551 | push_string (s, expand, ap) |
726f6388 JA |
1552 | char *s; |
1553 | int expand; | |
ccc6cda3 | 1554 | alias_t *ap; |
726f6388 | 1555 | { |
f73dda09 | 1556 | STRING_SAVER *temp = (STRING_SAVER *)xmalloc (sizeof (STRING_SAVER)); |
726f6388 JA |
1557 | |
1558 | temp->expand_alias = expand; | |
1559 | temp->saved_line = shell_input_line; | |
1560 | temp->saved_line_size = shell_input_line_size; | |
1561 | temp->saved_line_index = shell_input_line_index; | |
1562 | temp->saved_line_terminator = shell_input_line_terminator; | |
cce855bc | 1563 | #if defined (ALIAS) |
ccc6cda3 | 1564 | temp->expander = ap; |
cce855bc | 1565 | #endif |
726f6388 JA |
1566 | temp->next = pushed_string_list; |
1567 | pushed_string_list = temp; | |
1568 | ||
cce855bc | 1569 | #if defined (ALIAS) |
d166f048 JA |
1570 | if (ap) |
1571 | ap->flags |= AL_BEINGEXPANDED; | |
cce855bc | 1572 | #endif |
726f6388 JA |
1573 | |
1574 | shell_input_line = s; | |
1575 | shell_input_line_size = strlen (s); | |
1576 | shell_input_line_index = 0; | |
1577 | shell_input_line_terminator = '\0'; | |
d3a24ed2 CR |
1578 | #if 0 |
1579 | parser_state &= ~PST_ALEXPNEXT; /* XXX */ | |
1580 | #endif | |
7117c2d2 JA |
1581 | |
1582 | set_line_mbstate (); | |
726f6388 JA |
1583 | } |
1584 | ||
1585 | /* | |
1586 | * Make the top of the pushed_string stack be the current shell input. | |
1587 | * Only called when there is something on the stack. Called from shell_getc | |
1588 | * when it thinks it has consumed the string generated by an alias expansion | |
1589 | * and needs to return to the original input line. | |
1590 | */ | |
1591 | static void | |
1592 | pop_string () | |
1593 | { | |
1594 | STRING_SAVER *t; | |
1595 | ||
1596 | FREE (shell_input_line); | |
1597 | shell_input_line = pushed_string_list->saved_line; | |
1598 | shell_input_line_index = pushed_string_list->saved_line_index; | |
1599 | shell_input_line_size = pushed_string_list->saved_line_size; | |
1600 | shell_input_line_terminator = pushed_string_list->saved_line_terminator; | |
ccc6cda3 JA |
1601 | |
1602 | if (pushed_string_list->expand_alias) | |
1603 | parser_state |= PST_ALEXPNEXT; | |
1604 | else | |
1605 | parser_state &= ~PST_ALEXPNEXT; | |
726f6388 JA |
1606 | |
1607 | t = pushed_string_list; | |
1608 | pushed_string_list = pushed_string_list->next; | |
ccc6cda3 | 1609 | |
cce855bc | 1610 | #if defined (ALIAS) |
d166f048 JA |
1611 | if (t->expander) |
1612 | t->expander->flags &= ~AL_BEINGEXPANDED; | |
cce855bc | 1613 | #endif |
ccc6cda3 JA |
1614 | |
1615 | free ((char *)t); | |
7117c2d2 JA |
1616 | |
1617 | set_line_mbstate (); | |
726f6388 JA |
1618 | } |
1619 | ||
1620 | static void | |
1621 | free_string_list () | |
1622 | { | |
ccc6cda3 | 1623 | register STRING_SAVER *t, *t1; |
726f6388 | 1624 | |
ccc6cda3 | 1625 | for (t = pushed_string_list; t; ) |
726f6388 JA |
1626 | { |
1627 | t1 = t->next; | |
1628 | FREE (t->saved_line); | |
cce855bc JA |
1629 | #if defined (ALIAS) |
1630 | if (t->expander) | |
1631 | t->expander->flags &= ~AL_BEINGEXPANDED; | |
1632 | #endif | |
726f6388 JA |
1633 | free ((char *)t); |
1634 | t = t1; | |
1635 | } | |
1636 | pushed_string_list = (STRING_SAVER *)NULL; | |
1637 | } | |
1638 | ||
cce855bc | 1639 | #endif /* ALIAS || DPAREN_ARITHMETIC */ |
ccc6cda3 | 1640 | |
d3a24ed2 CR |
1641 | void |
1642 | free_pushed_string_input () | |
1643 | { | |
1644 | #if defined (ALIAS) || defined (DPAREN_ARITHMETIC) | |
1645 | free_string_list (); | |
1646 | #endif | |
1647 | } | |
1648 | ||
726f6388 JA |
1649 | /* Return a line of text, taken from wherever yylex () reads input. |
1650 | If there is no more input, then we return NULL. If REMOVE_QUOTED_NEWLINE | |
1651 | is non-zero, we remove unquoted \<newline> pairs. This is used by | |
1652 | read_secondary_line to read here documents. */ | |
1653 | static char * | |
1654 | read_a_line (remove_quoted_newline) | |
1655 | int remove_quoted_newline; | |
1656 | { | |
1657 | static char *line_buffer = (char *)NULL; | |
1658 | static int buffer_size = 0; | |
1659 | int indx = 0, c, peekc, pass_next; | |
1660 | ||
ccc6cda3 | 1661 | #if defined (READLINE) |
d3a24ed2 | 1662 | if (no_line_editing && SHOULD_PROMPT ()) |
ccc6cda3 | 1663 | #else |
d3a24ed2 | 1664 | if (SHOULD_PROMPT ()) |
ccc6cda3 JA |
1665 | #endif |
1666 | print_prompt (); | |
1667 | ||
726f6388 JA |
1668 | pass_next = 0; |
1669 | while (1) | |
1670 | { | |
726f6388 JA |
1671 | /* Allow immediate exit if interrupted during input. */ |
1672 | QUIT; | |
1673 | ||
01ed5ba4 CR |
1674 | c = yy_getc (); |
1675 | ||
28ef6c31 | 1676 | /* Ignore null bytes in input. */ |
726f6388 | 1677 | if (c == 0) |
28ef6c31 JA |
1678 | { |
1679 | #if 0 | |
1680 | internal_warning ("read_a_line: ignored null byte in input"); | |
1681 | #endif | |
1682 | continue; | |
1683 | } | |
726f6388 JA |
1684 | |
1685 | /* If there is no more input, then we return NULL. */ | |
1686 | if (c == EOF) | |
1687 | { | |
ccc6cda3 JA |
1688 | if (interactive && bash_input.type == st_stream) |
1689 | clearerr (stdin); | |
726f6388 JA |
1690 | if (indx == 0) |
1691 | return ((char *)NULL); | |
1692 | c = '\n'; | |
1693 | } | |
1694 | ||
1695 | /* `+2' in case the final character in the buffer is a newline. */ | |
ccc6cda3 | 1696 | RESIZE_MALLOCED_BUFFER (line_buffer, indx, 2, buffer_size, 128); |
726f6388 JA |
1697 | |
1698 | /* IF REMOVE_QUOTED_NEWLINES is non-zero, we are reading a | |
1699 | here document with an unquoted delimiter. In this case, | |
1700 | the line will be expanded as if it were in double quotes. | |
1701 | We allow a backslash to escape the next character, but we | |
1702 | need to treat the backslash specially only if a backslash | |
1703 | quoting a backslash-newline pair appears in the line. */ | |
1704 | if (pass_next) | |
28ef6c31 | 1705 | { |
726f6388 JA |
1706 | line_buffer[indx++] = c; |
1707 | pass_next = 0; | |
28ef6c31 | 1708 | } |
726f6388 JA |
1709 | else if (c == '\\' && remove_quoted_newline) |
1710 | { | |
1711 | peekc = yy_getc (); | |
1712 | if (peekc == '\n') | |
d3a24ed2 CR |
1713 | { |
1714 | line_number++; | |
1715 | continue; /* Make the unquoted \<newline> pair disappear. */ | |
1716 | } | |
726f6388 JA |
1717 | else |
1718 | { | |
1719 | yy_ungetc (peekc); | |
1720 | pass_next = 1; | |
1721 | line_buffer[indx++] = c; /* Preserve the backslash. */ | |
1722 | } | |
1723 | } | |
1724 | else | |
1725 | line_buffer[indx++] = c; | |
1726 | ||
1727 | if (c == '\n') | |
1728 | { | |
1729 | line_buffer[indx] = '\0'; | |
1730 | return (line_buffer); | |
1731 | } | |
1732 | } | |
1733 | } | |
1734 | ||
1735 | /* Return a line as in read_a_line (), but insure that the prompt is | |
1736 | the secondary prompt. This is used to read the lines of a here | |
1737 | document. REMOVE_QUOTED_NEWLINE is non-zero if we should remove | |
1738 | newlines quoted with backslashes while reading the line. It is | |
1739 | non-zero unless the delimiter of the here document was quoted. */ | |
1740 | char * | |
1741 | read_secondary_line (remove_quoted_newline) | |
1742 | int remove_quoted_newline; | |
1743 | { | |
1744 | prompt_string_pointer = &ps2_prompt; | |
d3a24ed2 CR |
1745 | if (SHOULD_PROMPT()) |
1746 | prompt_again (); | |
726f6388 JA |
1747 | return (read_a_line (remove_quoted_newline)); |
1748 | } | |
1749 | ||
726f6388 JA |
1750 | /* **************************************************************** */ |
1751 | /* */ | |
1752 | /* YYLEX () */ | |
1753 | /* */ | |
1754 | /* **************************************************************** */ | |
1755 | ||
1756 | /* Reserved words. These are only recognized as the first word of a | |
1757 | command. */ | |
1758 | STRING_INT_ALIST word_token_alist[] = { | |
1759 | { "if", IF }, | |
1760 | { "then", THEN }, | |
1761 | { "else", ELSE }, | |
1762 | { "elif", ELIF }, | |
1763 | { "fi", FI }, | |
1764 | { "case", CASE }, | |
1765 | { "esac", ESAC }, | |
1766 | { "for", FOR }, | |
1767 | #if defined (SELECT_COMMAND) | |
1768 | { "select", SELECT }, | |
1769 | #endif | |
1770 | { "while", WHILE }, | |
1771 | { "until", UNTIL }, | |
1772 | { "do", DO }, | |
1773 | { "done", DONE }, | |
1774 | { "in", IN }, | |
1775 | { "function", FUNCTION }, | |
ccc6cda3 JA |
1776 | #if defined (COMMAND_TIMING) |
1777 | { "time", TIME }, | |
1778 | #endif | |
726f6388 JA |
1779 | { "{", '{' }, |
1780 | { "}", '}' }, | |
1781 | { "!", BANG }, | |
cce855bc JA |
1782 | #if defined (COND_COMMAND) |
1783 | { "[[", COND_START }, | |
1784 | { "]]", COND_END }, | |
1785 | #endif | |
726f6388 JA |
1786 | { (char *)NULL, 0} |
1787 | }; | |
1788 | ||
7117c2d2 JA |
1789 | /* other tokens that can be returned by read_token() */ |
1790 | STRING_INT_ALIST other_token_alist[] = { | |
1791 | /* Multiple-character tokens with special values */ | |
1792 | { "-p", TIMEOPT }, | |
1793 | { "&&", AND_AND }, | |
1794 | { "||", OR_OR }, | |
1795 | { ">>", GREATER_GREATER }, | |
1796 | { "<<", LESS_LESS }, | |
1797 | { "<&", LESS_AND }, | |
1798 | { ">&", GREATER_AND }, | |
1799 | { ";;", SEMI_SEMI }, | |
1800 | { "<<-", LESS_LESS_MINUS }, | |
1801 | { "<<<", LESS_LESS_LESS }, | |
1802 | { "&>", AND_GREATER }, | |
1803 | { "<>", LESS_GREATER }, | |
1804 | { ">|", GREATER_BAR }, | |
1805 | { "EOF", yacc_EOF }, | |
1806 | /* Tokens whose value is the character itself */ | |
1807 | { ">", '>' }, | |
1808 | { "<", '<' }, | |
1809 | { "-", '-' }, | |
1810 | { "{", '{' }, | |
1811 | { "}", '}' }, | |
1812 | { ";", ';' }, | |
1813 | { "(", '(' }, | |
1814 | { ")", ')' }, | |
1815 | { "|", '|' }, | |
1816 | { "&", '&' }, | |
1817 | { "newline", '\n' }, | |
1818 | { (char *)NULL, 0} | |
1819 | }; | |
1820 | ||
1821 | /* others not listed here: | |
1822 | WORD look at yylval.word | |
1823 | ASSIGNMENT_WORD look at yylval.word | |
1824 | NUMBER look at yylval.number | |
1825 | ARITH_CMD look at yylval.word_list | |
1826 | ARITH_FOR_EXPRS look at yylval.word_list | |
1827 | COND_CMD look at yylval.command | |
1828 | */ | |
b72432fd | 1829 | |
ccc6cda3 JA |
1830 | /* These are used by read_token_word, but appear up here so that shell_getc |
1831 | can use them to decide when to add otherwise blank lines to the history. */ | |
1832 | ||
1833 | /* The primary delimiter stack. */ | |
1834 | struct dstack dstack = { (char *)NULL, 0, 0 }; | |
1835 | ||
1836 | /* A temporary delimiter stack to be used when decoding prompt strings. | |
1837 | This is needed because command substitutions in prompt strings (e.g., PS2) | |
1838 | can screw up the parser's quoting state. */ | |
1839 | static struct dstack temp_dstack = { (char *)NULL, 0, 0 }; | |
1840 | ||
1841 | /* Macro for accessing the top delimiter on the stack. Returns the | |
1842 | delimiter or zero if none. */ | |
1843 | #define current_delimiter(ds) \ | |
1844 | (ds.delimiter_depth ? ds.delimiters[ds.delimiter_depth - 1] : 0) | |
1845 | ||
1846 | #define push_delimiter(ds, character) \ | |
1847 | do \ | |
1848 | { \ | |
1849 | if (ds.delimiter_depth + 2 > ds.delimiter_space) \ | |
f73dda09 | 1850 | ds.delimiters = (char *)xrealloc \ |
ccc6cda3 JA |
1851 | (ds.delimiters, (ds.delimiter_space += 10) * sizeof (char)); \ |
1852 | ds.delimiters[ds.delimiter_depth] = character; \ | |
1853 | ds.delimiter_depth++; \ | |
1854 | } \ | |
1855 | while (0) | |
1856 | ||
1857 | #define pop_delimiter(ds) ds.delimiter_depth-- | |
1858 | ||
726f6388 JA |
1859 | /* Return the next shell input character. This always reads characters |
1860 | from shell_input_line; when that line is exhausted, it is time to | |
1861 | read the next line. This is called by read_token when the shell is | |
1862 | processing normal command input. */ | |
ccc6cda3 | 1863 | |
28ef6c31 JA |
1864 | /* This implements one-character lookahead/lookbehind across physical input |
1865 | lines, to avoid something being lost because it's pushed back with | |
1866 | shell_ungetc when we're at the start of a line. */ | |
1867 | static int eol_ungetc_lookahead = 0; | |
1868 | ||
726f6388 JA |
1869 | static int |
1870 | shell_getc (remove_quoted_newline) | |
1871 | int remove_quoted_newline; | |
1872 | { | |
ccc6cda3 | 1873 | register int i; |
726f6388 | 1874 | int c; |
f73dda09 | 1875 | unsigned char uc; |
726f6388 JA |
1876 | |
1877 | QUIT; | |
1878 | ||
7027abcb CR |
1879 | if (sigwinch_received) |
1880 | { | |
1881 | sigwinch_received = 0; | |
ac58e8c8 | 1882 | get_new_window_size (0, (int *)0, (int *)0); |
7027abcb CR |
1883 | } |
1884 | ||
28ef6c31 JA |
1885 | if (eol_ungetc_lookahead) |
1886 | { | |
1887 | c = eol_ungetc_lookahead; | |
1888 | eol_ungetc_lookahead = 0; | |
1889 | return (c); | |
1890 | } | |
1891 | ||
cce855bc | 1892 | #if defined (ALIAS) || defined (DPAREN_ARITHMETIC) |
726f6388 JA |
1893 | /* If shell_input_line[shell_input_line_index] == 0, but there is |
1894 | something on the pushed list of strings, then we don't want to go | |
1895 | off and get another line. We let the code down below handle it. */ | |
1896 | ||
1897 | if (!shell_input_line || ((!shell_input_line[shell_input_line_index]) && | |
1898 | (pushed_string_list == (STRING_SAVER *)NULL))) | |
cce855bc | 1899 | #else /* !ALIAS && !DPAREN_ARITHMETIC */ |
726f6388 | 1900 | if (!shell_input_line || !shell_input_line[shell_input_line_index]) |
cce855bc | 1901 | #endif /* !ALIAS && !DPAREN_ARITHMETIC */ |
726f6388 | 1902 | { |
726f6388 JA |
1903 | line_number++; |
1904 | ||
1905 | restart_read: | |
1906 | ||
1907 | /* Allow immediate exit if interrupted during input. */ | |
1908 | QUIT; | |
1909 | ||
1910 | i = 0; | |
1911 | shell_input_line_terminator = 0; | |
1912 | ||
d3a24ed2 CR |
1913 | /* If the shell is interatctive, but not currently printing a prompt |
1914 | (interactive_shell && interactive == 0), we don't want to print | |
1915 | notifies or cleanup the jobs -- we want to defer it until we do | |
1916 | print the next prompt. */ | |
1917 | if (interactive_shell == 0 || SHOULD_PROMPT()) | |
1918 | { | |
726f6388 JA |
1919 | #if defined (JOB_CONTROL) |
1920 | /* This can cause a problem when reading a command as the result | |
1921 | of a trap, when the trap is called from flush_child. This call | |
1922 | had better not cause jobs to disappear from the job table in | |
1923 | that case, or we will have big trouble. */ | |
d3a24ed2 | 1924 | notify_and_cleanup (); |
726f6388 | 1925 | #else /* !JOB_CONTROL */ |
d3a24ed2 | 1926 | cleanup_dead_jobs (); |
726f6388 | 1927 | #endif /* !JOB_CONTROL */ |
d3a24ed2 | 1928 | } |
726f6388 JA |
1929 | |
1930 | #if defined (READLINE) | |
d3a24ed2 | 1931 | if (no_line_editing && SHOULD_PROMPT()) |
726f6388 | 1932 | #else |
d3a24ed2 | 1933 | if (SHOULD_PROMPT()) |
726f6388 JA |
1934 | #endif |
1935 | print_prompt (); | |
1936 | ||
1937 | if (bash_input.type == st_stream) | |
1938 | clearerr (stdin); | |
1939 | ||
28ef6c31 | 1940 | while (1) |
726f6388 | 1941 | { |
28ef6c31 JA |
1942 | c = yy_getc (); |
1943 | ||
726f6388 JA |
1944 | /* Allow immediate exit if interrupted during input. */ |
1945 | QUIT; | |
1946 | ||
28ef6c31 JA |
1947 | if (c == '\0') |
1948 | { | |
1949 | #if 0 | |
1950 | internal_warning ("shell_getc: ignored null byte in input"); | |
1951 | #endif | |
1952 | continue; | |
1953 | } | |
1954 | ||
ccc6cda3 | 1955 | RESIZE_MALLOCED_BUFFER (shell_input_line, i, 2, shell_input_line_size, 256); |
726f6388 JA |
1956 | |
1957 | if (c == EOF) | |
1958 | { | |
1959 | if (bash_input.type == st_stream) | |
1960 | clearerr (stdin); | |
1961 | ||
ccc6cda3 | 1962 | if (i == 0) |
726f6388 JA |
1963 | shell_input_line_terminator = EOF; |
1964 | ||
1965 | shell_input_line[i] = '\0'; | |
1966 | break; | |
1967 | } | |
1968 | ||
1969 | shell_input_line[i++] = c; | |
1970 | ||
1971 | if (c == '\n') | |
1972 | { | |
1973 | shell_input_line[--i] = '\0'; | |
1974 | current_command_line_count++; | |
1975 | break; | |
1976 | } | |
1977 | } | |
28ef6c31 | 1978 | |
726f6388 JA |
1979 | shell_input_line_index = 0; |
1980 | shell_input_line_len = i; /* == strlen (shell_input_line) */ | |
1981 | ||
7117c2d2 JA |
1982 | set_line_mbstate (); |
1983 | ||
726f6388 | 1984 | #if defined (HISTORY) |
ccc6cda3 | 1985 | if (remember_on_history && shell_input_line && shell_input_line[0]) |
726f6388 JA |
1986 | { |
1987 | char *expansions; | |
ccc6cda3 JA |
1988 | # if defined (BANG_HISTORY) |
1989 | int old_hist; | |
1990 | ||
1991 | /* If the current delimiter is a single quote, we should not be | |
1992 | performing history expansion, even if we're on a different | |
1993 | line from the original single quote. */ | |
1994 | old_hist = history_expansion_inhibited; | |
1995 | if (current_delimiter (dstack) == '\'') | |
1996 | history_expansion_inhibited = 1; | |
1997 | # endif | |
726f6388 | 1998 | expansions = pre_process_line (shell_input_line, 1, 1); |
ccc6cda3 JA |
1999 | # if defined (BANG_HISTORY) |
2000 | history_expansion_inhibited = old_hist; | |
2001 | # endif | |
d166f048 JA |
2002 | if (expansions != shell_input_line) |
2003 | { | |
2004 | free (shell_input_line); | |
2005 | shell_input_line = expansions; | |
2006 | shell_input_line_len = shell_input_line ? | |
2007 | strlen (shell_input_line) : 0; | |
2008 | if (!shell_input_line_len) | |
2009 | current_command_line_count--; | |
2010 | ||
2011 | /* We have to force the xrealloc below because we don't know | |
28ef6c31 | 2012 | the true allocated size of shell_input_line anymore. */ |
d166f048 | 2013 | shell_input_line_size = shell_input_line_len; |
7117c2d2 JA |
2014 | |
2015 | set_line_mbstate (); | |
d166f048 | 2016 | } |
726f6388 | 2017 | } |
28ef6c31 JA |
2018 | /* Try to do something intelligent with blank lines encountered while |
2019 | entering multi-line commands. XXX - this is grotesque */ | |
ccc6cda3 JA |
2020 | else if (remember_on_history && shell_input_line && |
2021 | shell_input_line[0] == '\0' && | |
28ef6c31 | 2022 | current_command_line_count > 1) |
ccc6cda3 | 2023 | { |
28ef6c31 JA |
2024 | if (current_delimiter (dstack)) |
2025 | /* We know shell_input_line[0] == 0 and we're reading some sort of | |
2026 | quoted string. This means we've got a line consisting of only | |
2027 | a newline in a quoted string. We want to make sure this line | |
2028 | gets added to the history. */ | |
2029 | maybe_add_history (shell_input_line); | |
2030 | else | |
2031 | { | |
2032 | char *hdcs; | |
2033 | hdcs = history_delimiting_chars (); | |
2034 | if (hdcs && hdcs[0] == ';') | |
2035 | maybe_add_history (shell_input_line); | |
2036 | } | |
ccc6cda3 JA |
2037 | } |
2038 | ||
726f6388 JA |
2039 | #endif /* HISTORY */ |
2040 | ||
2041 | if (shell_input_line) | |
2042 | { | |
2043 | /* Lines that signify the end of the shell's input should not be | |
2044 | echoed. */ | |
2045 | if (echo_input_at_read && (shell_input_line[0] || | |
2046 | shell_input_line_terminator != EOF)) | |
2047 | fprintf (stderr, "%s\n", shell_input_line); | |
2048 | } | |
2049 | else | |
2050 | { | |
2051 | shell_input_line_size = 0; | |
2052 | prompt_string_pointer = ¤t_prompt_string; | |
d3a24ed2 CR |
2053 | if (SHOULD_PROMPT ()) |
2054 | prompt_again (); | |
726f6388 JA |
2055 | goto restart_read; |
2056 | } | |
2057 | ||
2058 | /* Add the newline to the end of this string, iff the string does | |
2059 | not already end in an EOF character. */ | |
2060 | if (shell_input_line_terminator != EOF) | |
2061 | { | |
ccc6cda3 | 2062 | if (shell_input_line_len + 3 > shell_input_line_size) |
f73dda09 | 2063 | shell_input_line = (char *)xrealloc (shell_input_line, |
726f6388 JA |
2064 | 1 + (shell_input_line_size += 2)); |
2065 | ||
ccc6cda3 JA |
2066 | shell_input_line[shell_input_line_len] = '\n'; |
2067 | shell_input_line[shell_input_line_len + 1] = '\0'; | |
7117c2d2 JA |
2068 | |
2069 | set_line_mbstate (); | |
726f6388 JA |
2070 | } |
2071 | } | |
ccc6cda3 | 2072 | |
f73dda09 | 2073 | uc = shell_input_line[shell_input_line_index]; |
726f6388 | 2074 | |
f73dda09 | 2075 | if (uc) |
726f6388 JA |
2076 | shell_input_line_index++; |
2077 | ||
cce855bc | 2078 | #if defined (ALIAS) || defined (DPAREN_ARITHMETIC) |
f73dda09 | 2079 | /* If UC is NULL, we have reached the end of the current input string. If |
726f6388 JA |
2080 | pushed_string_list is non-empty, it's time to pop to the previous string |
2081 | because we have fully consumed the result of the last alias expansion. | |
2082 | Do it transparently; just return the next character of the string popped | |
2083 | to. */ | |
f73dda09 | 2084 | if (!uc && (pushed_string_list != (STRING_SAVER *)NULL)) |
726f6388 | 2085 | { |
d3a24ed2 CR |
2086 | pop_string (); |
2087 | uc = shell_input_line[shell_input_line_index]; | |
2088 | if (uc) | |
2089 | shell_input_line_index++; | |
726f6388 | 2090 | } |
cce855bc | 2091 | #endif /* ALIAS || DPAREN_ARITHMETIC */ |
726f6388 | 2092 | |
10590446 CR |
2093 | if MBTEST(uc == '\\' && remove_quoted_newline && shell_input_line[shell_input_line_index] == '\n') |
2094 | { | |
2095 | if (SHOULD_PROMPT ()) | |
2096 | prompt_again (); | |
2097 | line_number++; | |
2098 | goto restart_read; | |
2099 | } | |
2100 | ||
f73dda09 | 2101 | if (!uc && shell_input_line_terminator == EOF) |
ccc6cda3 | 2102 | return ((shell_input_line_index != 0) ? '\n' : EOF); |
726f6388 | 2103 | |
f73dda09 | 2104 | return (uc); |
726f6388 JA |
2105 | } |
2106 | ||
7117c2d2 JA |
2107 | /* Put C back into the input for the shell. This might need changes for |
2108 | HANDLE_MULTIBYTE around EOLs. Since we (currently) never push back a | |
2109 | character different than we read, shell_input_line_property doesn't need | |
2110 | to change when manipulating shell_input_line. The define for | |
2111 | last_shell_getc_is_singlebyte should take care of it, though. */ | |
726f6388 JA |
2112 | static void |
2113 | shell_ungetc (c) | |
2114 | int c; | |
2115 | { | |
2116 | if (shell_input_line && shell_input_line_index) | |
2117 | shell_input_line[--shell_input_line_index] = c; | |
28ef6c31 JA |
2118 | else |
2119 | eol_ungetc_lookahead = c; | |
726f6388 JA |
2120 | } |
2121 | ||
f73dda09 JA |
2122 | #ifdef INCLUDE_UNUSED |
2123 | /* Back the input pointer up by one, effectively `ungetting' a character. */ | |
ccc6cda3 JA |
2124 | static void |
2125 | shell_ungetchar () | |
2126 | { | |
2127 | if (shell_input_line && shell_input_line_index) | |
2128 | shell_input_line_index--; | |
2129 | } | |
f73dda09 | 2130 | #endif |
ccc6cda3 JA |
2131 | |
2132 | /* Discard input until CHARACTER is seen, then push that character back | |
2133 | onto the input stream. */ | |
726f6388 JA |
2134 | static void |
2135 | discard_until (character) | |
2136 | int character; | |
2137 | { | |
2138 | int c; | |
2139 | ||
2140 | while ((c = shell_getc (0)) != EOF && c != character) | |
2141 | ; | |
2142 | ||
2143 | if (c != EOF) | |
2144 | shell_ungetc (c); | |
2145 | } | |
726f6388 JA |
2146 | |
2147 | void | |
d3ad40de CR |
2148 | execute_variable_command (command, vname) |
2149 | char *command, *vname; | |
726f6388 | 2150 | { |
726f6388 | 2151 | char *last_lastarg; |
d3a24ed2 | 2152 | sh_parser_state_t ps; |
726f6388 | 2153 | |
d3a24ed2 | 2154 | save_parser_state (&ps); |
726f6388 JA |
2155 | last_lastarg = get_string_value ("_"); |
2156 | if (last_lastarg) | |
2157 | last_lastarg = savestring (last_lastarg); | |
2158 | ||
d3ad40de | 2159 | parse_and_execute (savestring (command), vname, SEVAL_NONINT|SEVAL_NOHIST); |
726f6388 | 2160 | |
d3a24ed2 | 2161 | restore_parser_state (&ps); |
d11b8b46 | 2162 | bind_variable ("_", last_lastarg, 0); |
726f6388 JA |
2163 | FREE (last_lastarg); |
2164 | ||
ccc6cda3 | 2165 | if (token_to_read == '\n') /* reset_parser was called */ |
726f6388 JA |
2166 | token_to_read = 0; |
2167 | } | |
2168 | ||
ccc6cda3 JA |
2169 | /* Place to remember the token. We try to keep the buffer |
2170 | at a reasonable size, but it can grow. */ | |
2171 | static char *token = (char *)NULL; | |
2172 | ||
2173 | /* Current size of the token buffer. */ | |
2174 | static int token_buffer_size; | |
2175 | ||
726f6388 JA |
2176 | /* Command to read_token () explaining what we want it to do. */ |
2177 | #define READ 0 | |
2178 | #define RESET 1 | |
2179 | #define prompt_is_ps1 \ | |
2180 | (!prompt_string_pointer || prompt_string_pointer == &ps1_prompt) | |
2181 | ||
2182 | /* Function for yyparse to call. yylex keeps track of | |
2183 | the last two tokens read, and calls read_token. */ | |
ccc6cda3 | 2184 | static int |
726f6388 JA |
2185 | yylex () |
2186 | { | |
ccc6cda3 | 2187 | if (interactive && (current_token == 0 || current_token == '\n')) |
726f6388 JA |
2188 | { |
2189 | /* Before we print a prompt, we might have to check mailboxes. | |
2190 | We do this only if it is time to do so. Notice that only here | |
2191 | is the mail alarm reset; nothing takes place in check_mail () | |
2192 | except the checking of mail. Please don't change this. */ | |
2193 | if (prompt_is_ps1 && time_to_check_mail ()) | |
2194 | { | |
2195 | check_mail (); | |
2196 | reset_mail_timer (); | |
2197 | } | |
2198 | ||
2199 | /* Avoid printing a prompt if we're not going to read anything, e.g. | |
2200 | after resetting the parser with read_token (RESET). */ | |
d3a24ed2 | 2201 | if (token_to_read == 0 && SHOULD_PROMPT ()) |
726f6388 JA |
2202 | prompt_again (); |
2203 | } | |
2204 | ||
ccc6cda3 | 2205 | two_tokens_ago = token_before_that; |
726f6388 JA |
2206 | token_before_that = last_read_token; |
2207 | last_read_token = current_token; | |
2208 | current_token = read_token (READ); | |
2209 | return (current_token); | |
2210 | } | |
2211 | ||
726f6388 JA |
2212 | /* When non-zero, we have read the required tokens |
2213 | which allow ESAC to be the next one read. */ | |
ccc6cda3 | 2214 | static int esacs_needed_count; |
726f6388 JA |
2215 | |
2216 | void | |
2217 | gather_here_documents () | |
2218 | { | |
2219 | int r = 0; | |
2220 | while (need_here_doc) | |
2221 | { | |
2222 | make_here_document (redir_stack[r++]); | |
2223 | need_here_doc--; | |
2224 | } | |
2225 | } | |
2226 | ||
726f6388 JA |
2227 | /* When non-zero, an open-brace used to create a group is awaiting a close |
2228 | brace partner. */ | |
ccc6cda3 | 2229 | static int open_brace_count; |
726f6388 JA |
2230 | |
2231 | #define command_token_position(token) \ | |
2232 | (((token) == ASSIGNMENT_WORD) || \ | |
2233 | ((token) != SEMI_SEMI && reserved_word_acceptable(token))) | |
2234 | ||
d3a24ed2 CR |
2235 | #define assignment_acceptable(token) \ |
2236 | (command_token_position(token) && ((parser_state & PST_CASEPAT) == 0)) | |
726f6388 JA |
2237 | |
2238 | /* Check to see if TOKEN is a reserved word and return the token | |
2239 | value if it is. */ | |
2240 | #define CHECK_FOR_RESERVED_WORD(tok) \ | |
2241 | do { \ | |
2242 | if (!dollar_present && !quoted && \ | |
2243 | reserved_word_acceptable (last_read_token)) \ | |
2244 | { \ | |
2245 | int i; \ | |
2246 | for (i = 0; word_token_alist[i].word != (char *)NULL; i++) \ | |
2247 | if (STREQ (tok, word_token_alist[i].word)) \ | |
2248 | { \ | |
ccc6cda3 | 2249 | if ((parser_state & PST_CASEPAT) && (word_token_alist[i].token != ESAC)) \ |
726f6388 | 2250 | break; \ |
d3a24ed2 | 2251 | if (word_token_alist[i].token == TIME && time_command_acceptable () == 0) \ |
cce855bc | 2252 | break; \ |
726f6388 | 2253 | if (word_token_alist[i].token == ESAC) \ |
ccc6cda3 JA |
2254 | parser_state &= ~(PST_CASEPAT|PST_CASESTMT); \ |
2255 | else if (word_token_alist[i].token == CASE) \ | |
2256 | parser_state |= PST_CASESTMT; \ | |
cce855bc JA |
2257 | else if (word_token_alist[i].token == COND_END) \ |
2258 | parser_state &= ~(PST_CONDCMD|PST_CONDEXPR); \ | |
2259 | else if (word_token_alist[i].token == COND_START) \ | |
2260 | parser_state |= PST_CONDCMD; \ | |
ccc6cda3 JA |
2261 | else if (word_token_alist[i].token == '{') \ |
2262 | open_brace_count++; \ | |
2263 | else if (word_token_alist[i].token == '}' && open_brace_count) \ | |
2264 | open_brace_count--; \ | |
726f6388 JA |
2265 | return (word_token_alist[i].token); \ |
2266 | } \ | |
2267 | } \ | |
2268 | } while (0) | |
2269 | ||
ccc6cda3 JA |
2270 | #if defined (ALIAS) |
2271 | ||
2272 | /* OK, we have a token. Let's try to alias expand it, if (and only if) | |
2273 | it's eligible. | |
2274 | ||
7117c2d2 | 2275 | It is eligible for expansion if EXPAND_ALIASES is set, and |
ccc6cda3 JA |
2276 | the token is unquoted and the last token read was a command |
2277 | separator (or expand_next_token is set), and we are currently | |
2278 | processing an alias (pushed_string_list is non-empty) and this | |
2279 | token is not the same as the current or any previously | |
2280 | processed alias. | |
2281 | ||
2282 | Special cases that disqualify: | |
2283 | In a pattern list in a case statement (parser_state & PST_CASEPAT). */ | |
d3a24ed2 CR |
2284 | |
2285 | static char * | |
2286 | mk_alexpansion (s) | |
2287 | char *s; | |
2288 | { | |
2289 | int l; | |
2290 | char *r; | |
2291 | ||
2292 | l = strlen (s); | |
2293 | r = xmalloc (l + 2); | |
2294 | strcpy (r, s); | |
2295 | if (r[l -1] != ' ') | |
2296 | r[l++] = ' '; | |
2297 | r[l] = '\0'; | |
2298 | return r; | |
2299 | } | |
2300 | ||
ccc6cda3 | 2301 | static int |
f73dda09 JA |
2302 | alias_expand_token (tokstr) |
2303 | char *tokstr; | |
726f6388 | 2304 | { |
ccc6cda3 JA |
2305 | char *expanded; |
2306 | alias_t *ap; | |
726f6388 | 2307 | |
ccc6cda3 JA |
2308 | if (((parser_state & PST_ALEXPNEXT) || command_token_position (last_read_token)) && |
2309 | (parser_state & PST_CASEPAT) == 0) | |
726f6388 | 2310 | { |
f73dda09 | 2311 | ap = find_alias (tokstr); |
ccc6cda3 JA |
2312 | |
2313 | /* Currently expanding this token. */ | |
2314 | if (ap && (ap->flags & AL_BEINGEXPANDED)) | |
2315 | return (NO_EXPANSION); | |
2316 | ||
d3a24ed2 CR |
2317 | /* mk_alexpansion puts an extra space on the end of the alias expansion, |
2318 | so the lookahead by the parser works right. If this gets changed, | |
2319 | make sure the code in shell_getc that deals with reaching the end of | |
2320 | an expanded alias is changed with it. */ | |
2321 | expanded = ap ? mk_alexpansion (ap->value) : (char *)NULL; | |
2322 | ||
ccc6cda3 JA |
2323 | if (expanded) |
2324 | { | |
2325 | push_string (expanded, ap->flags & AL_EXPANDNEXT, ap); | |
2326 | return (RE_READ_TOKEN); | |
2327 | } | |
2328 | else | |
2329 | /* This is an eligible token that does not have an expansion. */ | |
2330 | return (NO_EXPANSION); | |
726f6388 | 2331 | } |
ccc6cda3 JA |
2332 | return (NO_EXPANSION); |
2333 | } | |
2334 | #endif /* ALIAS */ | |
726f6388 | 2335 | |
cce855bc JA |
2336 | static int |
2337 | time_command_acceptable () | |
2338 | { | |
2339 | #if defined (COMMAND_TIMING) | |
2340 | switch (last_read_token) | |
2341 | { | |
2342 | case 0: | |
2343 | case ';': | |
2344 | case '\n': | |
2345 | case AND_AND: | |
2346 | case OR_OR: | |
2347 | case '&': | |
b72432fd JA |
2348 | case DO: |
2349 | case THEN: | |
2350 | case ELSE: | |
28ef6c31 JA |
2351 | case '{': /* } */ |
2352 | case '(': /* ) */ | |
cce855bc JA |
2353 | return 1; |
2354 | default: | |
2355 | return 0; | |
2356 | } | |
2357 | #else | |
2358 | return 0; | |
2359 | #endif /* COMMAND_TIMING */ | |
2360 | } | |
2361 | ||
ccc6cda3 JA |
2362 | /* Handle special cases of token recognition: |
2363 | IN is recognized if the last token was WORD and the token | |
2364 | before that was FOR or CASE or SELECT. | |
2365 | ||
2366 | DO is recognized if the last token was WORD and the token | |
2367 | before that was FOR or SELECT. | |
2368 | ||
2369 | ESAC is recognized if the last token caused `esacs_needed_count' | |
2370 | to be set | |
2371 | ||
2372 | `{' is recognized if the last token as WORD and the token | |
28ef6c31 JA |
2373 | before that was FUNCTION, or if we just parsed an arithmetic |
2374 | `for' command. | |
ccc6cda3 | 2375 | |
28ef6c31 | 2376 | `}' is recognized if there is an unclosed `{' present. |
cce855bc JA |
2377 | |
2378 | `-p' is returned as TIMEOPT if the last read token was TIME. | |
2379 | ||
2380 | ']]' is returned as COND_END if the parser is currently parsing | |
2381 | a conditional expression ((parser_state & PST_CONDEXPR) != 0) | |
2382 | ||
2383 | `time' is returned as TIME if and only if it is immediately | |
2384 | preceded by one of `;', `\n', `||', `&&', or `&'. | |
ccc6cda3 JA |
2385 | */ |
2386 | ||
2387 | static int | |
f73dda09 JA |
2388 | special_case_tokens (tokstr) |
2389 | char *tokstr; | |
ccc6cda3 JA |
2390 | { |
2391 | if ((last_read_token == WORD) && | |
2392 | #if defined (SELECT_COMMAND) | |
2393 | ((token_before_that == FOR) || (token_before_that == CASE) || (token_before_that == SELECT)) && | |
2394 | #else | |
2395 | ((token_before_that == FOR) || (token_before_that == CASE)) && | |
2396 | #endif | |
f73dda09 | 2397 | (tokstr[0] == 'i' && tokstr[1] == 'n' && tokstr[2] == 0)) |
726f6388 | 2398 | { |
ccc6cda3 JA |
2399 | if (token_before_that == CASE) |
2400 | { | |
2401 | parser_state |= PST_CASEPAT; | |
2402 | esacs_needed_count++; | |
2403 | } | |
2404 | return (IN); | |
2405 | } | |
726f6388 | 2406 | |
ccc6cda3 JA |
2407 | if (last_read_token == WORD && |
2408 | #if defined (SELECT_COMMAND) | |
2409 | (token_before_that == FOR || token_before_that == SELECT) && | |
2410 | #else | |
2411 | (token_before_that == FOR) && | |
2412 | #endif | |
f73dda09 | 2413 | (tokstr[0] == 'd' && tokstr[1] == 'o' && tokstr[2] == '\0')) |
ccc6cda3 JA |
2414 | return (DO); |
2415 | ||
2416 | /* Ditto for ESAC in the CASE case. | |
2417 | Specifically, this handles "case word in esac", which is a legal | |
2418 | construct, certainly because someone will pass an empty arg to the | |
2419 | case construct, and we don't want it to barf. Of course, we should | |
2420 | insist that the case construct has at least one pattern in it, but | |
2421 | the designers disagree. */ | |
2422 | if (esacs_needed_count) | |
2423 | { | |
2424 | esacs_needed_count--; | |
f73dda09 | 2425 | if (STREQ (tokstr, "esac")) |
726f6388 | 2426 | { |
ccc6cda3 JA |
2427 | parser_state &= ~PST_CASEPAT; |
2428 | return (ESAC); | |
726f6388 | 2429 | } |
ccc6cda3 | 2430 | } |
726f6388 | 2431 | |
ccc6cda3 JA |
2432 | /* The start of a shell function definition. */ |
2433 | if (parser_state & PST_ALLOWOPNBRC) | |
2434 | { | |
2435 | parser_state &= ~PST_ALLOWOPNBRC; | |
f73dda09 | 2436 | if (tokstr[0] == '{' && tokstr[1] == '\0') /* } */ |
726f6388 | 2437 | { |
ccc6cda3 JA |
2438 | open_brace_count++; |
2439 | function_bstart = line_number; | |
2440 | return ('{'); /* } */ | |
726f6388 | 2441 | } |
ccc6cda3 JA |
2442 | } |
2443 | ||
28ef6c31 JA |
2444 | /* We allow a `do' after a for ((...)) without an intervening |
2445 | list_terminator */ | |
f73dda09 | 2446 | if (last_read_token == ARITH_FOR_EXPRS && tokstr[0] == 'd' && tokstr[1] == 'o' && !tokstr[2]) |
28ef6c31 | 2447 | return (DO); |
f73dda09 | 2448 | if (last_read_token == ARITH_FOR_EXPRS && tokstr[0] == '{' && tokstr[1] == '\0') /* } */ |
28ef6c31 JA |
2449 | { |
2450 | open_brace_count++; | |
2451 | return ('{'); /* } */ | |
2452 | } | |
2453 | ||
f73dda09 | 2454 | if (open_brace_count && reserved_word_acceptable (last_read_token) && tokstr[0] == '}' && !tokstr[1]) |
ccc6cda3 JA |
2455 | { |
2456 | open_brace_count--; /* { */ | |
2457 | return ('}'); | |
2458 | } | |
2459 | ||
cce855bc | 2460 | #if defined (COMMAND_TIMING) |
ccc6cda3 | 2461 | /* Handle -p after `time'. */ |
f73dda09 | 2462 | if (last_read_token == TIME && tokstr[0] == '-' && tokstr[1] == 'p' && !tokstr[2]) |
ccc6cda3 | 2463 | return (TIMEOPT); |
cce855bc JA |
2464 | #endif |
2465 | ||
d3a24ed2 | 2466 | #if 0 |
cce855bc | 2467 | #if defined (COMMAND_TIMING) |
b72432fd | 2468 | if (STREQ (token, "time") && ((parser_state & PST_CASEPAT) == 0) && time_command_acceptable ()) |
cce855bc JA |
2469 | return (TIME); |
2470 | #endif /* COMMAND_TIMING */ | |
d3a24ed2 | 2471 | #endif |
cce855bc JA |
2472 | |
2473 | #if defined (COND_COMMAND) /* [[ */ | |
f73dda09 | 2474 | if ((parser_state & PST_CONDEXPR) && tokstr[0] == ']' && tokstr[1] == ']' && tokstr[2] == '\0') |
cce855bc JA |
2475 | return (COND_END); |
2476 | #endif | |
726f6388 | 2477 | |
ccc6cda3 JA |
2478 | return (-1); |
2479 | } | |
2480 | ||
2481 | /* Called from shell.c when Control-C is typed at top level. Or | |
2482 | by the error rule at top level. */ | |
2483 | void | |
2484 | reset_parser () | |
2485 | { | |
2486 | dstack.delimiter_depth = 0; /* No delimiters found so far. */ | |
2487 | open_brace_count = 0; | |
2488 | ||
2489 | parser_state = 0; | |
2490 | ||
cce855bc | 2491 | #if defined (ALIAS) || defined (DPAREN_ARITHMETIC) |
ccc6cda3 | 2492 | if (pushed_string_list) |
cce855bc JA |
2493 | free_string_list (); |
2494 | #endif /* ALIAS || DPAREN_ARITHMETIC */ | |
726f6388 | 2495 | |
ccc6cda3 JA |
2496 | if (shell_input_line) |
2497 | { | |
2498 | free (shell_input_line); | |
2499 | shell_input_line = (char *)NULL; | |
2500 | shell_input_line_size = shell_input_line_index = 0; | |
2501 | } | |
2502 | ||
2503 | FREE (word_desc_to_read); | |
2504 | word_desc_to_read = (WORD_DESC *)NULL; | |
2505 | ||
2506 | last_read_token = '\n'; | |
2507 | token_to_read = '\n'; | |
2508 | } | |
2509 | ||
2510 | /* Read the next token. Command can be READ (normal operation) or | |
2511 | RESET (to normalize state). */ | |
2512 | static int | |
2513 | read_token (command) | |
2514 | int command; | |
2515 | { | |
2516 | int character; /* Current character. */ | |
2517 | int peek_char; /* Temporary look-ahead character. */ | |
2518 | int result; /* The thing to return. */ | |
2519 | ||
2520 | if (command == RESET) | |
2521 | { | |
2522 | reset_parser (); | |
726f6388 JA |
2523 | return ('\n'); |
2524 | } | |
2525 | ||
2526 | if (token_to_read) | |
2527 | { | |
ccc6cda3 JA |
2528 | result = token_to_read; |
2529 | if (token_to_read == WORD || token_to_read == ASSIGNMENT_WORD) | |
d166f048 JA |
2530 | { |
2531 | yylval.word = word_desc_to_read; | |
2532 | word_desc_to_read = (WORD_DESC *)NULL; | |
2533 | } | |
726f6388 | 2534 | token_to_read = 0; |
ccc6cda3 | 2535 | return (result); |
726f6388 JA |
2536 | } |
2537 | ||
cce855bc JA |
2538 | #if defined (COND_COMMAND) |
2539 | if ((parser_state & (PST_CONDCMD|PST_CONDEXPR)) == PST_CONDCMD) | |
2540 | { | |
2541 | cond_lineno = line_number; | |
2542 | parser_state |= PST_CONDEXPR; | |
2543 | yylval.command = parse_cond_command (); | |
2544 | if (cond_token != COND_END) | |
2545 | { | |
7117c2d2 | 2546 | cond_error (); |
cce855bc JA |
2547 | return (-1); |
2548 | } | |
2549 | token_to_read = COND_END; | |
2550 | parser_state &= ~(PST_CONDEXPR|PST_CONDCMD); | |
2551 | return (COND_CMD); | |
2552 | } | |
2553 | #endif | |
2554 | ||
726f6388 | 2555 | #if defined (ALIAS) |
726f6388 JA |
2556 | /* This is a place to jump back to once we have successfully expanded a |
2557 | token with an alias and pushed the string with push_string () */ | |
2558 | re_read_token: | |
726f6388 JA |
2559 | #endif /* ALIAS */ |
2560 | ||
2561 | /* Read a single word from input. Start by skipping blanks. */ | |
d3ad40de | 2562 | while ((character = shell_getc (1)) != EOF && shellblank (character)) |
ccc6cda3 | 2563 | ; |
726f6388 JA |
2564 | |
2565 | if (character == EOF) | |
2566 | { | |
2567 | EOF_Reached = 1; | |
2568 | return (yacc_EOF); | |
2569 | } | |
2570 | ||
7117c2d2 | 2571 | if MBTEST(character == '#' && (!interactive || interactive_comments)) |
726f6388 JA |
2572 | { |
2573 | /* A comment. Discard until EOL or EOF, and then return a newline. */ | |
2574 | discard_until ('\n'); | |
2575 | shell_getc (0); | |
ccc6cda3 | 2576 | character = '\n'; /* this will take the next if statement and return. */ |
726f6388 JA |
2577 | } |
2578 | ||
2579 | if (character == '\n') | |
2580 | { | |
2581 | /* If we're about to return an unquoted newline, we can go and collect | |
2582 | the text of any pending here document. */ | |
2583 | if (need_here_doc) | |
2584 | gather_here_documents (); | |
2585 | ||
2586 | #if defined (ALIAS) | |
ccc6cda3 | 2587 | parser_state &= ~PST_ALEXPNEXT; |
726f6388 JA |
2588 | #endif /* ALIAS */ |
2589 | ||
301e2142 CR |
2590 | parser_state &= ~PST_ASSIGNOK; |
2591 | ||
726f6388 JA |
2592 | return (character); |
2593 | } | |
2594 | ||
d3ad40de CR |
2595 | if (parser_state & PST_REGEXP) |
2596 | goto tokword; | |
2597 | ||
ccc6cda3 | 2598 | /* Shell meta-characters. */ |
7117c2d2 | 2599 | if MBTEST(shellmeta (character) && ((parser_state & PST_DBLPAREN) == 0)) |
726f6388 JA |
2600 | { |
2601 | #if defined (ALIAS) | |
2602 | /* Turn off alias tokenization iff this character sequence would | |
2603 | not leave us ready to read a command. */ | |
2604 | if (character == '<' || character == '>') | |
ccc6cda3 | 2605 | parser_state &= ~PST_ALEXPNEXT; |
726f6388 JA |
2606 | #endif /* ALIAS */ |
2607 | ||
301e2142 CR |
2608 | parser_state &= ~PST_ASSIGNOK; |
2609 | ||
ccc6cda3 JA |
2610 | peek_char = shell_getc (1); |
2611 | if (character == peek_char) | |
726f6388 JA |
2612 | { |
2613 | switch (character) | |
2614 | { | |
ccc6cda3 | 2615 | case '<': |
726f6388 JA |
2616 | /* If '<' then we could be at "<<" or at "<<-". We have to |
2617 | look ahead one more character. */ | |
726f6388 JA |
2618 | peek_char = shell_getc (1); |
2619 | if (peek_char == '-') | |
2620 | return (LESS_LESS_MINUS); | |
7117c2d2 JA |
2621 | else if (peek_char == '<') |
2622 | return (LESS_LESS_LESS); | |
726f6388 JA |
2623 | else |
2624 | { | |
2625 | shell_ungetc (peek_char); | |
2626 | return (LESS_LESS); | |
2627 | } | |
2628 | ||
2629 | case '>': | |
2630 | return (GREATER_GREATER); | |
2631 | ||
2632 | case ';': | |
ccc6cda3 | 2633 | parser_state |= PST_CASEPAT; |
726f6388 | 2634 | #if defined (ALIAS) |
ccc6cda3 | 2635 | parser_state &= ~PST_ALEXPNEXT; |
726f6388 | 2636 | #endif /* ALIAS */ |
301e2142 | 2637 | |
726f6388 JA |
2638 | return (SEMI_SEMI); |
2639 | ||
2640 | case '&': | |
2641 | return (AND_AND); | |
2642 | ||
2643 | case '|': | |
2644 | return (OR_OR); | |
ccc6cda3 | 2645 | |
bb70624e | 2646 | #if defined (DPAREN_ARITHMETIC) || defined (ARITH_FOR_COMMAND) |
ccc6cda3 | 2647 | case '(': /* ) */ |
7117c2d2 JA |
2648 | result = parse_dparen (character); |
2649 | if (result == -2) | |
2650 | break; | |
2651 | else | |
2652 | return result; | |
ccc6cda3 | 2653 | #endif |
726f6388 | 2654 | } |
726f6388 | 2655 | } |
7117c2d2 | 2656 | else if MBTEST(character == '<' && peek_char == '&') |
ccc6cda3 | 2657 | return (LESS_AND); |
7117c2d2 | 2658 | else if MBTEST(character == '>' && peek_char == '&') |
ccc6cda3 | 2659 | return (GREATER_AND); |
7117c2d2 | 2660 | else if MBTEST(character == '<' && peek_char == '>') |
ccc6cda3 | 2661 | return (LESS_GREATER); |
7117c2d2 | 2662 | else if MBTEST(character == '>' && peek_char == '|') |
ccc6cda3 | 2663 | return (GREATER_BAR); |
7117c2d2 | 2664 | else if MBTEST(peek_char == '>' && character == '&') |
ccc6cda3 JA |
2665 | return (AND_GREATER); |
2666 | ||
726f6388 JA |
2667 | shell_ungetc (peek_char); |
2668 | ||
2669 | /* If we look like we are reading the start of a function | |
2670 | definition, then let the reader know about it so that | |
2671 | we will do the right thing with `{'. */ | |
7117c2d2 | 2672 | if MBTEST(character == ')' && last_read_token == '(' && token_before_that == WORD) |
726f6388 | 2673 | { |
ccc6cda3 | 2674 | parser_state |= PST_ALLOWOPNBRC; |
726f6388 | 2675 | #if defined (ALIAS) |
ccc6cda3 | 2676 | parser_state &= ~PST_ALEXPNEXT; |
726f6388 | 2677 | #endif /* ALIAS */ |
ccc6cda3 | 2678 | function_dstart = line_number; |
726f6388 JA |
2679 | } |
2680 | ||
ccc6cda3 JA |
2681 | /* case pattern lists may be preceded by an optional left paren. If |
2682 | we're not trying to parse a case pattern list, the left paren | |
2683 | indicates a subshell. */ | |
7117c2d2 | 2684 | if MBTEST(character == '(' && (parser_state & PST_CASEPAT) == 0) /* ) */ |
ccc6cda3 JA |
2685 | parser_state |= PST_SUBSHELL; |
2686 | /*(*/ | |
7117c2d2 | 2687 | else if MBTEST((parser_state & PST_CASEPAT) && character == ')') |
28ef6c31 | 2688 | parser_state &= ~PST_CASEPAT; |
ccc6cda3 | 2689 | /*(*/ |
7117c2d2 | 2690 | else if MBTEST((parser_state & PST_SUBSHELL) && character == ')') |
ccc6cda3 | 2691 | parser_state &= ~PST_SUBSHELL; |
726f6388 JA |
2692 | |
2693 | #if defined (PROCESS_SUBSTITUTION) | |
2694 | /* Check for the constructs which introduce process substitution. | |
2695 | Shells running in `posix mode' don't do process substitution. */ | |
7117c2d2 | 2696 | if MBTEST(posixly_correct || ((character != '>' && character != '<') || peek_char != '(')) /*)*/ |
726f6388 JA |
2697 | #endif /* PROCESS_SUBSTITUTION */ |
2698 | return (character); | |
2699 | } | |
2700 | ||
7117c2d2 JA |
2701 | /* Hack <&- (close stdin) case. Also <&N- (dup and close). */ |
2702 | if MBTEST(character == '-' && (last_read_token == LESS_AND || last_read_token == GREATER_AND)) | |
ccc6cda3 JA |
2703 | return (character); |
2704 | ||
d3ad40de | 2705 | tokword: |
726f6388 JA |
2706 | /* Okay, if we got this far, we have to read a word. Read one, |
2707 | and then check it against the known ones. */ | |
ccc6cda3 JA |
2708 | result = read_token_word (character); |
2709 | #if defined (ALIAS) | |
2710 | if (result == RE_READ_TOKEN) | |
2711 | goto re_read_token; | |
2712 | #endif | |
2713 | return result; | |
2714 | } | |
726f6388 | 2715 | |
7117c2d2 JA |
2716 | /* |
2717 | * Match a $(...) or other grouping construct. This has to handle embedded | |
2718 | * quoted strings ('', ``, "") and nested constructs. It also must handle | |
fd3925f1 CR |
2719 | * reprompting the user, if necessary, after reading a newline, and returning |
2720 | * correct error values if it reads EOF. | |
7117c2d2 | 2721 | */ |
b72432fd | 2722 | #define P_FIRSTCLOSE 0x01 |
bb70624e | 2723 | #define P_ALLOWESC 0x02 |
d3a24ed2 | 2724 | #define P_DQUOTE 0x04 |
f6410766 | 2725 | #define P_COMMAND 0x08 /* parsing a command, so look for comments */ |
27a1808c | 2726 | #define P_BACKQUOTE 0x10 /* parsing a backquoted command substitution */ |
b72432fd | 2727 | |
ccc6cda3 JA |
2728 | static char matched_pair_error; |
2729 | static char * | |
2730 | parse_matched_pair (qc, open, close, lenp, flags) | |
2731 | int qc; /* `"' if this construct is within double quotes */ | |
2732 | int open, close; | |
2733 | int *lenp, flags; | |
2734 | { | |
f6410766 | 2735 | int count, ch, was_dollar, in_comment, check_comment; |
27a1808c | 2736 | int pass_next_character, backq_backslash, nestlen, ttranslen, start_lineno; |
28ef6c31 | 2737 | char *ret, *nestret, *ttrans; |
d3a24ed2 | 2738 | int retind, retsize, rflags; |
726f6388 | 2739 | |
462a7a25 | 2740 | /* itrace("parse_matched_pair: open = %c close = %c", open, close); */ |
ccc6cda3 | 2741 | count = 1; |
27a1808c | 2742 | pass_next_character = backq_backslash = was_dollar = in_comment = 0; |
d3ad40de | 2743 | check_comment = (flags & P_COMMAND) && qc != '`' && qc != '\'' && qc != '"' && (flags & P_DQUOTE) == 0; |
726f6388 | 2744 | |
d3a24ed2 CR |
2745 | /* RFLAGS is the set of flags we want to pass to recursive calls. */ |
2746 | rflags = (qc == '"') ? P_DQUOTE : (flags & P_DQUOTE); | |
2747 | ||
f73dda09 | 2748 | ret = (char *)xmalloc (retsize = 64); |
ccc6cda3 | 2749 | retind = 0; |
726f6388 | 2750 | |
ccc6cda3 JA |
2751 | start_lineno = line_number; |
2752 | while (count) | |
2753 | { | |
27a1808c | 2754 | ch = shell_getc (qc != '\'' && pass_next_character == 0 && backq_backslash == 0); |
b317c077 | 2755 | |
ccc6cda3 JA |
2756 | if (ch == EOF) |
2757 | { | |
2758 | free (ret); | |
5e13499c | 2759 | parser_error (start_lineno, _("unexpected EOF while looking for matching `%c'"), close); |
ccc6cda3 JA |
2760 | EOF_Reached = 1; /* XXX */ |
2761 | return (&matched_pair_error); | |
2762 | } | |
726f6388 | 2763 | |
ccc6cda3 | 2764 | /* Possible reprompting. */ |
d3a24ed2 | 2765 | if (ch == '\n' && SHOULD_PROMPT ()) |
ccc6cda3 | 2766 | prompt_again (); |
726f6388 | 2767 | |
f6410766 CR |
2768 | if (in_comment) |
2769 | { | |
2770 | /* Add this character. */ | |
2771 | RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64); | |
2772 | ret[retind++] = ch; | |
2773 | ||
2774 | if (ch == '\n') | |
2775 | in_comment = 0; | |
2776 | ||
2777 | continue; | |
2778 | } | |
d3ad40de CR |
2779 | /* Not exactly right yet, should handle shell metacharacters, too. If |
2780 | any changes are made to this test, make analogous changes to subst.c: | |
2781 | extract_delimited_string(). */ | |
b317c077 | 2782 | else if MBTEST(check_comment && in_comment == 0 && ch == '#' && (retind == 0 || ret[retind-1] == '\n' || whitespace (ret[retind - 1]))) |
f6410766 CR |
2783 | in_comment = 1; |
2784 | ||
27a1808c CR |
2785 | /* last char was backslash inside backquoted command substitution */ |
2786 | if (backq_backslash) | |
2787 | { | |
2788 | backq_backslash = 0; | |
2789 | /* Placeholder for adding special characters */ | |
2790 | } | |
2791 | ||
ccc6cda3 JA |
2792 | if (pass_next_character) /* last char was backslash */ |
2793 | { | |
2794 | pass_next_character = 0; | |
2795 | if (qc != '\'' && ch == '\n') /* double-quoted \<newline> disappears. */ | |
2796 | { | |
2797 | if (retind > 0) retind--; /* swallow previously-added backslash */ | |
2798 | continue; | |
2799 | } | |
726f6388 | 2800 | |
ccc6cda3 | 2801 | RESIZE_MALLOCED_BUFFER (ret, retind, 2, retsize, 64); |
7117c2d2 | 2802 | if MBTEST(ch == CTLESC || ch == CTLNUL) |
ccc6cda3 JA |
2803 | ret[retind++] = CTLESC; |
2804 | ret[retind++] = ch; | |
2805 | continue; | |
2806 | } | |
7117c2d2 | 2807 | else if MBTEST(ch == CTLESC || ch == CTLNUL) /* special shell escapes */ |
ccc6cda3 JA |
2808 | { |
2809 | RESIZE_MALLOCED_BUFFER (ret, retind, 2, retsize, 64); | |
2810 | ret[retind++] = CTLESC; | |
2811 | ret[retind++] = ch; | |
2812 | continue; | |
2813 | } | |
7117c2d2 | 2814 | else if MBTEST(ch == close) /* ending delimiter */ |
ccc6cda3 | 2815 | count--; |
bb70624e | 2816 | /* handle nested ${...} specially. */ |
7117c2d2 | 2817 | else if MBTEST(open != close && was_dollar && open == '{' && ch == open) /* } */ |
28ef6c31 | 2818 | count++; |
7117c2d2 | 2819 | else if MBTEST(((flags & P_FIRSTCLOSE) == 0) && ch == open) /* nested begin */ |
ccc6cda3 | 2820 | count++; |
726f6388 | 2821 | |
ccc6cda3 JA |
2822 | /* Add this character. */ |
2823 | RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64); | |
2824 | ret[retind++] = ch; | |
726f6388 | 2825 | |
ccc6cda3 | 2826 | if (open == '\'') /* '' inside grouping construct */ |
bb70624e | 2827 | { |
7117c2d2 | 2828 | if MBTEST((flags & P_ALLOWESC) && ch == '\\') |
bb70624e | 2829 | pass_next_character++; |
462a7a25 | 2830 | #if 0 |
27a1808c CR |
2831 | else if MBTEST((flags & P_BACKQUOTE) && ch == '\\') |
2832 | backq_backslash++; | |
462a7a25 | 2833 | #endif |
bb70624e JA |
2834 | continue; |
2835 | } | |
726f6388 | 2836 | |
7117c2d2 | 2837 | if MBTEST(ch == '\\') /* backslashes */ |
ccc6cda3 | 2838 | pass_next_character++; |
726f6388 | 2839 | |
ccc6cda3 JA |
2840 | if (open != close) /* a grouping construct */ |
2841 | { | |
7117c2d2 | 2842 | if MBTEST(shellquote (ch)) |
ccc6cda3 JA |
2843 | { |
2844 | /* '', ``, or "" inside $(...) or other grouping construct. */ | |
2845 | push_delimiter (dstack, ch); | |
7117c2d2 | 2846 | if MBTEST(was_dollar && ch == '\'') /* $'...' inside group */ |
d3a24ed2 | 2847 | nestret = parse_matched_pair (ch, ch, ch, &nestlen, P_ALLOWESC|rflags); |
28ef6c31 | 2848 | else |
d3a24ed2 | 2849 | nestret = parse_matched_pair (ch, ch, ch, &nestlen, rflags); |
ccc6cda3 JA |
2850 | pop_delimiter (dstack); |
2851 | if (nestret == &matched_pair_error) | |
2852 | { | |
2853 | free (ret); | |
2854 | return &matched_pair_error; | |
2855 | } | |
d3a24ed2 | 2856 | if MBTEST(was_dollar && ch == '\'' && (extended_quote || (rflags & P_DQUOTE) == 0)) |
28ef6c31 JA |
2857 | { |
2858 | /* Translate $'...' here. */ | |
2859 | ttrans = ansiexpand (nestret, 0, nestlen - 1, &ttranslen); | |
f73dda09 | 2860 | xfree (nestret); |
c3271763 | 2861 | |
7790f917 CR |
2862 | if ((rflags & P_DQUOTE) == 0) |
2863 | { | |
2864 | nestret = sh_single_quote (ttrans); | |
2865 | free (ttrans); | |
2866 | nestlen = strlen (nestret); | |
2867 | } | |
2868 | else | |
2869 | { | |
2870 | nestret = ttrans; | |
2871 | nestlen = ttranslen; | |
2872 | } | |
28ef6c31 JA |
2873 | retind -= 2; /* back up before the $' */ |
2874 | } | |
d3a24ed2 | 2875 | else if MBTEST(was_dollar && ch == '"' && (extended_quote || (rflags & P_DQUOTE) == 0)) |
28ef6c31 JA |
2876 | { |
2877 | /* Locale expand $"..." here. */ | |
2878 | ttrans = localeexpand (nestret, 0, nestlen - 1, start_lineno, &ttranslen); | |
f73dda09 | 2879 | xfree (nestret); |
c3271763 CR |
2880 | |
2881 | nestret = sh_mkdoublequoted (ttrans, ttranslen, 0); | |
28ef6c31 | 2882 | free (ttrans); |
c3271763 | 2883 | nestlen = ttranslen + 2; |
28ef6c31 JA |
2884 | retind -= 2; /* back up before the $" */ |
2885 | } | |
7117c2d2 | 2886 | |
ccc6cda3 JA |
2887 | if (nestlen) |
2888 | { | |
2889 | RESIZE_MALLOCED_BUFFER (ret, retind, nestlen, retsize, 64); | |
2890 | strcpy (ret + retind, nestret); | |
2891 | retind += nestlen; | |
2892 | } | |
2893 | FREE (nestret); | |
2894 | } | |
2895 | } | |
2896 | /* Parse an old-style command substitution within double quotes as a | |
2897 | single word. */ | |
2898 | /* XXX - sh and ksh93 don't do this - XXX */ | |
7117c2d2 | 2899 | else if MBTEST(open == '"' && ch == '`') |
ccc6cda3 | 2900 | { |
d3a24ed2 | 2901 | nestret = parse_matched_pair (0, '`', '`', &nestlen, rflags); |
fd3925f1 | 2902 | add_nestret: |
ccc6cda3 JA |
2903 | if (nestret == &matched_pair_error) |
2904 | { | |
2905 | free (ret); | |
2906 | return &matched_pair_error; | |
2907 | } | |
2908 | if (nestlen) | |
2909 | { | |
2910 | RESIZE_MALLOCED_BUFFER (ret, retind, nestlen, retsize, 64); | |
2911 | strcpy (ret + retind, nestret); | |
2912 | retind += nestlen; | |
2913 | } | |
2914 | FREE (nestret); | |
2915 | } | |
462a7a25 | 2916 | #if 0 |
f6410766 | 2917 | else if MBTEST(qc == '`' && (ch == '"' || ch == '\'') && in_comment == 0) |
fd3925f1 | 2918 | { |
27a1808c | 2919 | /* Add P_BACKQUOTE so backslash quotes the next character and |
b317c077 CR |
2920 | shell_getc does the right thing with \<newline>. We do this for |
2921 | a measure of backwards compatibility -- it's not strictly the | |
2922 | right POSIX thing. */ | |
27a1808c | 2923 | nestret = parse_matched_pair (0, ch, ch, &nestlen, rflags|P_BACKQUOTE); |
fd3925f1 CR |
2924 | goto add_nestret; |
2925 | } | |
462a7a25 CR |
2926 | #endif |
2927 | else if MBTEST(open != '`' && was_dollar && (ch == '(' || ch == '{' || ch == '[')) /* ) } ] */ | |
ccc6cda3 JA |
2928 | /* check for $(), $[], or ${} inside quoted string. */ |
2929 | { | |
2930 | if (open == ch) /* undo previous increment */ | |
2931 | count--; | |
2932 | if (ch == '(') /* ) */ | |
11a6f9a9 | 2933 | nestret = parse_matched_pair (0, '(', ')', &nestlen, rflags & ~P_DQUOTE); |
ccc6cda3 | 2934 | else if (ch == '{') /* } */ |
d3a24ed2 | 2935 | nestret = parse_matched_pair (0, '{', '}', &nestlen, P_FIRSTCLOSE|rflags); |
ccc6cda3 | 2936 | else if (ch == '[') /* ] */ |
d3a24ed2 | 2937 | nestret = parse_matched_pair (0, '[', ']', &nestlen, rflags); |
fd3925f1 CR |
2938 | |
2939 | goto add_nestret; | |
ccc6cda3 | 2940 | } |
7117c2d2 | 2941 | was_dollar = MBTEST(ch == '$'); |
ccc6cda3 | 2942 | } |
726f6388 | 2943 | |
ccc6cda3 JA |
2944 | ret[retind] = '\0'; |
2945 | if (lenp) | |
2946 | *lenp = retind; | |
2947 | return ret; | |
2948 | } | |
726f6388 | 2949 | |
bb70624e | 2950 | #if defined (DPAREN_ARITHMETIC) || defined (ARITH_FOR_COMMAND) |
7117c2d2 JA |
2951 | /* Parse a double-paren construct. It can be either an arithmetic |
2952 | command, an arithmetic `for' command, or a nested subshell. Returns | |
2953 | the parsed token, -1 on error, or -2 if we didn't do anything and | |
2954 | should just go on. */ | |
2955 | static int | |
2956 | parse_dparen (c) | |
2957 | int c; | |
2958 | { | |
d3ad40de CR |
2959 | int cmdtyp, sline; |
2960 | char *wval; | |
7117c2d2 JA |
2961 | WORD_DESC *wd; |
2962 | ||
2963 | #if defined (ARITH_FOR_COMMAND) | |
2964 | if (last_read_token == FOR) | |
2965 | { | |
2966 | arith_for_lineno = line_number; | |
d3a24ed2 | 2967 | cmdtyp = parse_arith_cmd (&wval, 0); |
7117c2d2 JA |
2968 | if (cmdtyp == 1) |
2969 | { | |
227f982e CR |
2970 | wd = alloc_word_desc (); |
2971 | wd->word = wval; | |
7117c2d2 | 2972 | yylval.word_list = make_word_list (wd, (WORD_LIST *)NULL); |
7117c2d2 JA |
2973 | return (ARITH_FOR_EXPRS); |
2974 | } | |
2975 | else | |
2976 | return -1; /* ERROR */ | |
2977 | } | |
2978 | #endif | |
2979 | ||
2980 | #if defined (DPAREN_ARITHMETIC) | |
2981 | if (reserved_word_acceptable (last_read_token)) | |
2982 | { | |
2983 | sline = line_number; | |
c3271763 | 2984 | |
d3a24ed2 | 2985 | cmdtyp = parse_arith_cmd (&wval, 0); |
7117c2d2 JA |
2986 | if (cmdtyp == 1) /* arithmetic command */ |
2987 | { | |
227f982e CR |
2988 | wd = alloc_word_desc (); |
2989 | wd->word = wval; | |
da719982 | 2990 | wd->flags = W_QUOTED|W_NOSPLIT|W_NOGLOB|W_DQUOTE; |
7117c2d2 | 2991 | yylval.word_list = make_word_list (wd, (WORD_LIST *)NULL); |
7117c2d2 JA |
2992 | return (ARITH_CMD); |
2993 | } | |
2994 | else if (cmdtyp == 0) /* nested subshell */ | |
2995 | { | |
2996 | push_string (wval, 0, (alias_t *)NULL); | |
2997 | if ((parser_state & PST_CASEPAT) == 0) | |
2998 | parser_state |= PST_SUBSHELL; | |
2999 | return (c); | |
3000 | } | |
3001 | else /* ERROR */ | |
3002 | return -1; | |
3003 | } | |
3004 | #endif | |
3005 | ||
3006 | return -2; /* XXX */ | |
3007 | } | |
3008 | ||
d166f048 JA |
3009 | /* We've seen a `(('. Look for the matching `))'. If we get it, return 1. |
3010 | If not, assume it's a nested subshell for backwards compatibility and | |
3011 | return 0. In any case, put the characters we've consumed into a locally- | |
3012 | allocated buffer and make *ep point to that buffer. Return -1 on an | |
3013 | error, for example EOF. */ | |
3014 | static int | |
d3a24ed2 | 3015 | parse_arith_cmd (ep, adddq) |
d166f048 | 3016 | char **ep; |
d3a24ed2 | 3017 | int adddq; |
d166f048 JA |
3018 | { |
3019 | int exp_lineno, rval, c; | |
f73dda09 | 3020 | char *ttok, *tokstr; |
d166f048 JA |
3021 | int ttoklen; |
3022 | ||
3023 | exp_lineno = line_number; | |
3024 | ttok = parse_matched_pair (0, '(', ')', &ttoklen, 0); | |
3025 | rval = 1; | |
3026 | if (ttok == &matched_pair_error) | |
3027 | return -1; | |
3028 | /* Check that the next character is the closing right paren. If | |
3029 | not, this is a syntax error. ( */ | |
7117c2d2 JA |
3030 | c = shell_getc (0); |
3031 | if MBTEST(c != ')') | |
d166f048 JA |
3032 | rval = 0; |
3033 | ||
f73dda09 | 3034 | tokstr = (char *)xmalloc (ttoklen + 4); |
d166f048 | 3035 | |
d3a24ed2 CR |
3036 | /* if ADDDQ != 0 then (( ... )) -> "..." */ |
3037 | if (rval == 1 && adddq) /* arith cmd, add double quotes */ | |
d166f048 | 3038 | { |
d3a24ed2 CR |
3039 | tokstr[0] = '"'; |
3040 | strncpy (tokstr + 1, ttok, ttoklen - 1); | |
f73dda09 JA |
3041 | tokstr[ttoklen] = '"'; |
3042 | tokstr[ttoklen+1] = '\0'; | |
d166f048 | 3043 | } |
d3a24ed2 | 3044 | else if (rval == 1) /* arith cmd, don't add double quotes */ |
d166f048 | 3045 | { |
d3a24ed2 CR |
3046 | strncpy (tokstr, ttok, ttoklen - 1); |
3047 | tokstr[ttoklen-1] = '\0'; | |
3048 | } | |
3049 | else /* nested subshell */ | |
3050 | { | |
3051 | tokstr[0] = '('; | |
3052 | strncpy (tokstr + 1, ttok, ttoklen - 1); | |
f73dda09 JA |
3053 | tokstr[ttoklen] = ')'; |
3054 | tokstr[ttoklen+1] = c; | |
3055 | tokstr[ttoklen+2] = '\0'; | |
d166f048 | 3056 | } |
d3a24ed2 | 3057 | |
f73dda09 | 3058 | *ep = tokstr; |
d166f048 JA |
3059 | FREE (ttok); |
3060 | return rval; | |
3061 | } | |
bb70624e | 3062 | #endif /* DPAREN_ARITHMETIC || ARITH_FOR_COMMAND */ |
d166f048 | 3063 | |
cce855bc | 3064 | #if defined (COND_COMMAND) |
7117c2d2 JA |
3065 | static void |
3066 | cond_error () | |
3067 | { | |
3068 | char *etext; | |
3069 | ||
3070 | if (EOF_Reached && cond_token != COND_ERROR) /* [[ */ | |
5e13499c | 3071 | parser_error (cond_lineno, _("unexpected EOF while looking for `]]'")); |
7117c2d2 JA |
3072 | else if (cond_token != COND_ERROR) |
3073 | { | |
3074 | if (etext = error_token_from_token (cond_token)) | |
3075 | { | |
5e13499c | 3076 | parser_error (cond_lineno, _("syntax error in conditional expression: unexpected token `%s'"), etext); |
7117c2d2 JA |
3077 | free (etext); |
3078 | } | |
3079 | else | |
5e13499c | 3080 | parser_error (cond_lineno, _("syntax error in conditional expression")); |
7117c2d2 JA |
3081 | } |
3082 | } | |
3083 | ||
cce855bc JA |
3084 | static COND_COM * |
3085 | cond_expr () | |
3086 | { | |
3087 | return (cond_or ()); | |
3088 | } | |
3089 | ||
3090 | static COND_COM * | |
3091 | cond_or () | |
3092 | { | |
3093 | COND_COM *l, *r; | |
3094 | ||
3095 | l = cond_and (); | |
3096 | if (cond_token == OR_OR) | |
3097 | { | |
3098 | r = cond_or (); | |
3099 | l = make_cond_node (COND_OR, (WORD_DESC *)NULL, l, r); | |
3100 | } | |
3101 | return l; | |
3102 | } | |
3103 | ||
3104 | static COND_COM * | |
3105 | cond_and () | |
3106 | { | |
3107 | COND_COM *l, *r; | |
3108 | ||
3109 | l = cond_term (); | |
3110 | if (cond_token == AND_AND) | |
3111 | { | |
3112 | r = cond_and (); | |
3113 | l = make_cond_node (COND_AND, (WORD_DESC *)NULL, l, r); | |
3114 | } | |
3115 | return l; | |
3116 | } | |
3117 | ||
3118 | static int | |
3119 | cond_skip_newlines () | |
3120 | { | |
3121 | while ((cond_token = read_token (READ)) == '\n') | |
3122 | { | |
d3a24ed2 | 3123 | if (SHOULD_PROMPT ()) |
cce855bc JA |
3124 | prompt_again (); |
3125 | } | |
3126 | return (cond_token); | |
3127 | } | |
3128 | ||
3129 | #define COND_RETURN_ERROR() \ | |
3130 | do { cond_token = COND_ERROR; return ((COND_COM *)NULL); } while (0) | |
3131 | ||
3132 | static COND_COM * | |
3133 | cond_term () | |
3134 | { | |
3135 | WORD_DESC *op; | |
3136 | COND_COM *term, *tleft, *tright; | |
3137 | int tok, lineno; | |
7117c2d2 | 3138 | char *etext; |
cce855bc JA |
3139 | |
3140 | /* Read a token. It can be a left paren, a `!', a unary operator, or a | |
3141 | word that should be the first argument of a binary operator. Start by | |
3142 | skipping newlines, since this is a compound command. */ | |
3143 | tok = cond_skip_newlines (); | |
3144 | lineno = line_number; | |
3145 | if (tok == COND_END) | |
3146 | { | |
3147 | COND_RETURN_ERROR (); | |
3148 | } | |
3149 | else if (tok == '(') | |
3150 | { | |
3151 | term = cond_expr (); | |
3152 | if (cond_token != ')') | |
3153 | { | |
3154 | if (term) | |
3155 | dispose_cond_node (term); /* ( */ | |
7117c2d2 JA |
3156 | if (etext = error_token_from_token (cond_token)) |
3157 | { | |
5e13499c | 3158 | parser_error (lineno, _("unexpected token `%s', expected `)'"), etext); |
7117c2d2 JA |
3159 | free (etext); |
3160 | } | |
3161 | else | |
5e13499c | 3162 | parser_error (lineno, _("expected `)'")); |
cce855bc JA |
3163 | COND_RETURN_ERROR (); |
3164 | } | |
3165 | term = make_cond_node (COND_EXPR, (WORD_DESC *)NULL, term, (COND_COM *)NULL); | |
3166 | (void)cond_skip_newlines (); | |
3167 | } | |
3168 | else if (tok == BANG || (tok == WORD && (yylval.word->word[0] == '!' && yylval.word->word[1] == '\0'))) | |
3169 | { | |
3170 | if (tok == WORD) | |
3171 | dispose_word (yylval.word); /* not needed */ | |
3172 | term = cond_term (); | |
3173 | if (term) | |
3174 | term->flags |= CMD_INVERT_RETURN; | |
3175 | } | |
3176 | else if (tok == WORD && test_unop (yylval.word->word)) | |
3177 | { | |
3178 | op = yylval.word; | |
3179 | tok = read_token (READ); | |
3180 | if (tok == WORD) | |
3181 | { | |
3182 | tleft = make_cond_node (COND_TERM, yylval.word, (COND_COM *)NULL, (COND_COM *)NULL); | |
3183 | term = make_cond_node (COND_UNARY, op, tleft, (COND_COM *)NULL); | |
3184 | } | |
3185 | else | |
3186 | { | |
3187 | dispose_word (op); | |
7117c2d2 JA |
3188 | if (etext = error_token_from_token (tok)) |
3189 | { | |
5e13499c | 3190 | parser_error (line_number, _("unexpected argument `%s' to conditional unary operator"), etext); |
7117c2d2 JA |
3191 | free (etext); |
3192 | } | |
3193 | else | |
5e13499c | 3194 | parser_error (line_number, _("unexpected argument to conditional unary operator")); |
cce855bc JA |
3195 | COND_RETURN_ERROR (); |
3196 | } | |
3197 | ||
3198 | (void)cond_skip_newlines (); | |
3199 | } | |
bb70624e | 3200 | else if (tok == WORD) /* left argument to binary operator */ |
cce855bc JA |
3201 | { |
3202 | /* lhs */ | |
3203 | tleft = make_cond_node (COND_TERM, yylval.word, (COND_COM *)NULL, (COND_COM *)NULL); | |
3204 | ||
3205 | /* binop */ | |
3206 | tok = read_token (READ); | |
3207 | if (tok == WORD && test_binop (yylval.word->word)) | |
28ef6c31 | 3208 | op = yylval.word; |
d3a24ed2 | 3209 | #if defined (COND_REGEXP) |
d3ad40de CR |
3210 | else if (tok == WORD && STREQ (yylval.word->word, "=~")) |
3211 | { | |
3212 | op = yylval.word; | |
3213 | parser_state |= PST_REGEXP; | |
3214 | } | |
d3a24ed2 | 3215 | #endif |
cce855bc | 3216 | else if (tok == '<' || tok == '>') |
28ef6c31 JA |
3217 | op = make_word_from_token (tok); /* ( */ |
3218 | /* There should be a check before blindly accepting the `)' that we have | |
3219 | seen the opening `('. */ | |
3220 | else if (tok == COND_END || tok == AND_AND || tok == OR_OR || tok == ')') | |
cce855bc JA |
3221 | { |
3222 | /* Special case. [[ x ]] is equivalent to [[ -n x ]], just like | |
3223 | the test command. Similarly for [[ x && expr ]] or | |
28ef6c31 | 3224 | [[ x || expr ]] or [[ (x) ]]. */ |
cce855bc JA |
3225 | op = make_word ("-n"); |
3226 | term = make_cond_node (COND_UNARY, op, tleft, (COND_COM *)NULL); | |
3227 | cond_token = tok; | |
3228 | return (term); | |
3229 | } | |
3230 | else | |
3231 | { | |
7117c2d2 JA |
3232 | if (etext = error_token_from_token (tok)) |
3233 | { | |
5e13499c | 3234 | parser_error (line_number, _("unexpected token `%s', conditional binary operator expected"), etext); |
7117c2d2 JA |
3235 | free (etext); |
3236 | } | |
3237 | else | |
5e13499c | 3238 | parser_error (line_number, _("conditional binary operator expected")); |
cce855bc JA |
3239 | dispose_cond_node (tleft); |
3240 | COND_RETURN_ERROR (); | |
3241 | } | |
3242 | ||
3243 | /* rhs */ | |
3244 | tok = read_token (READ); | |
d3ad40de | 3245 | parser_state &= ~PST_REGEXP; |
cce855bc JA |
3246 | if (tok == WORD) |
3247 | { | |
3248 | tright = make_cond_node (COND_TERM, yylval.word, (COND_COM *)NULL, (COND_COM *)NULL); | |
3249 | term = make_cond_node (COND_BINARY, op, tleft, tright); | |
3250 | } | |
3251 | else | |
3252 | { | |
7117c2d2 JA |
3253 | if (etext = error_token_from_token (tok)) |
3254 | { | |
5e13499c | 3255 | parser_error (line_number, _("unexpected argument `%s' to conditional binary operator"), etext); |
7117c2d2 JA |
3256 | free (etext); |
3257 | } | |
3258 | else | |
5e13499c | 3259 | parser_error (line_number, _("unexpected argument to conditional binary operator")); |
cce855bc JA |
3260 | dispose_cond_node (tleft); |
3261 | dispose_word (op); | |
3262 | COND_RETURN_ERROR (); | |
3263 | } | |
3264 | ||
3265 | (void)cond_skip_newlines (); | |
3266 | } | |
bb70624e JA |
3267 | else |
3268 | { | |
3269 | if (tok < 256) | |
5e13499c | 3270 | parser_error (line_number, _("unexpected token `%c' in conditional command"), tok); |
7117c2d2 JA |
3271 | else if (etext = error_token_from_token (tok)) |
3272 | { | |
5e13499c | 3273 | parser_error (line_number, _("unexpected token `%s' in conditional command"), etext); |
7117c2d2 JA |
3274 | free (etext); |
3275 | } | |
bb70624e | 3276 | else |
5e13499c | 3277 | parser_error (line_number, _("unexpected token %d in conditional command"), tok); |
bb70624e JA |
3278 | COND_RETURN_ERROR (); |
3279 | } | |
cce855bc JA |
3280 | return (term); |
3281 | } | |
3282 | ||
3283 | /* This is kind of bogus -- we slip a mini recursive-descent parser in | |
3284 | here to handle the conditional statement syntax. */ | |
3285 | static COMMAND * | |
3286 | parse_cond_command () | |
3287 | { | |
3288 | COND_COM *cexp; | |
3289 | ||
3290 | cexp = cond_expr (); | |
3291 | return (make_cond_command (cexp)); | |
3292 | } | |
3293 | #endif | |
3294 | ||
7117c2d2 JA |
3295 | #if defined (ARRAY_VARS) |
3296 | /* When this is called, it's guaranteed that we don't care about anything | |
3297 | in t beyond i. We do save and restore the chars, though. */ | |
3298 | static int | |
3299 | token_is_assignment (t, i) | |
3300 | char *t; | |
3301 | int i; | |
3302 | { | |
3303 | unsigned char c, c1; | |
3304 | int r; | |
3305 | ||
3306 | c = t[i]; c1 = t[i+1]; | |
3307 | t[i] = '='; t[i+1] = '\0'; | |
5e13499c | 3308 | r = assignment (t, (parser_state & PST_COMPASSIGN) != 0); |
7117c2d2 JA |
3309 | t[i] = c; t[i+1] = c1; |
3310 | return r; | |
3311 | } | |
3312 | ||
d11b8b46 | 3313 | /* XXX - possible changes here for `+=' */ |
7117c2d2 JA |
3314 | static int |
3315 | token_is_ident (t, i) | |
3316 | char *t; | |
3317 | int i; | |
3318 | { | |
3319 | unsigned char c; | |
3320 | int r; | |
3321 | ||
3322 | c = t[i]; | |
3323 | t[i] = '\0'; | |
3324 | r = legal_identifier (t); | |
3325 | t[i] = c; | |
3326 | return r; | |
3327 | } | |
3328 | #endif | |
3329 | ||
ccc6cda3 JA |
3330 | static int |
3331 | read_token_word (character) | |
3332 | int character; | |
3333 | { | |
3334 | /* The value for YYLVAL when a WORD is read. */ | |
3335 | WORD_DESC *the_word; | |
726f6388 | 3336 | |
ccc6cda3 JA |
3337 | /* Index into the token that we are building. */ |
3338 | int token_index; | |
726f6388 | 3339 | |
ccc6cda3 | 3340 | /* ALL_DIGITS becomes zero when we see a non-digit. */ |
f73dda09 | 3341 | int all_digit_token; |
726f6388 | 3342 | |
ccc6cda3 JA |
3343 | /* DOLLAR_PRESENT becomes non-zero if we see a `$'. */ |
3344 | int dollar_present; | |
726f6388 | 3345 | |
43df7bbb CR |
3346 | /* COMPOUND_ASSIGNMENT becomes non-zero if we are parsing a compound |
3347 | assignment. */ | |
3348 | int compound_assignment; | |
3349 | ||
ccc6cda3 JA |
3350 | /* QUOTED becomes non-zero if we see one of ("), ('), (`), or (\). */ |
3351 | int quoted; | |
726f6388 | 3352 | |
ccc6cda3 JA |
3353 | /* Non-zero means to ignore the value of the next character, and just |
3354 | to add it no matter what. */ | |
3355 | int pass_next_character; | |
726f6388 | 3356 | |
ccc6cda3 JA |
3357 | /* The current delimiting character. */ |
3358 | int cd; | |
3359 | int result, peek_char; | |
3360 | char *ttok, *ttrans; | |
3361 | int ttoklen, ttranslen; | |
7117c2d2 | 3362 | intmax_t lvalue; |
726f6388 | 3363 | |
d166f048 | 3364 | if (token_buffer_size < TOKEN_DEFAULT_INITIAL_SIZE) |
f73dda09 | 3365 | token = (char *)xrealloc (token, token_buffer_size = TOKEN_DEFAULT_INITIAL_SIZE); |
726f6388 | 3366 | |
ccc6cda3 | 3367 | token_index = 0; |
f73dda09 | 3368 | all_digit_token = DIGIT (character); |
43df7bbb | 3369 | dollar_present = quoted = pass_next_character = compound_assignment = 0; |
726f6388 | 3370 | |
ccc6cda3 JA |
3371 | for (;;) |
3372 | { | |
3373 | if (character == EOF) | |
3374 | goto got_token; | |
726f6388 | 3375 | |
ccc6cda3 JA |
3376 | if (pass_next_character) |
3377 | { | |
3378 | pass_next_character = 0; | |
d3ad40de | 3379 | goto got_escaped_character; |
ccc6cda3 | 3380 | } |
726f6388 | 3381 | |
ccc6cda3 | 3382 | cd = current_delimiter (dstack); |
726f6388 | 3383 | |
ccc6cda3 JA |
3384 | /* Handle backslashes. Quote lots of things when not inside of |
3385 | double-quotes, quote some things inside of double-quotes. */ | |
7117c2d2 | 3386 | if MBTEST(character == '\\') |
ccc6cda3 JA |
3387 | { |
3388 | peek_char = shell_getc (0); | |
726f6388 | 3389 | |
ccc6cda3 JA |
3390 | /* Backslash-newline is ignored in all cases except |
3391 | when quoted with single quotes. */ | |
3392 | if (peek_char == '\n') | |
3393 | { | |
3394 | character = '\n'; | |
3395 | goto next_character; | |
3396 | } | |
3397 | else | |
3398 | { | |
3399 | shell_ungetc (peek_char); | |
726f6388 | 3400 | |
ccc6cda3 JA |
3401 | /* If the next character is to be quoted, note it now. */ |
3402 | if (cd == 0 || cd == '`' || | |
f73dda09 | 3403 | (cd == '"' && peek_char >= 0 && (sh_syntaxtab[peek_char] & CBSDQUOTE))) |
ccc6cda3 | 3404 | pass_next_character++; |
726f6388 | 3405 | |
ccc6cda3 JA |
3406 | quoted = 1; |
3407 | goto got_character; | |
3408 | } | |
3409 | } | |
726f6388 | 3410 | |
ccc6cda3 | 3411 | /* Parse a matched pair of quote characters. */ |
7117c2d2 | 3412 | if MBTEST(shellquote (character)) |
ccc6cda3 JA |
3413 | { |
3414 | push_delimiter (dstack, character); | |
f6410766 | 3415 | ttok = parse_matched_pair (character, character, character, &ttoklen, (character == '`') ? P_COMMAND : 0); |
ccc6cda3 JA |
3416 | pop_delimiter (dstack); |
3417 | if (ttok == &matched_pair_error) | |
3418 | return -1; /* Bail immediately. */ | |
3419 | RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 2, | |
3420 | token_buffer_size, TOKEN_DEFAULT_GROW_SIZE); | |
3421 | token[token_index++] = character; | |
3422 | strcpy (token + token_index, ttok); | |
3423 | token_index += ttoklen; | |
f73dda09 | 3424 | all_digit_token = 0; |
ccc6cda3 JA |
3425 | quoted = 1; |
3426 | dollar_present |= (character == '"' && strchr (ttok, '$') != 0); | |
3427 | FREE (ttok); | |
3428 | goto next_character; | |
3429 | } | |
726f6388 | 3430 | |
d3ad40de CR |
3431 | #ifdef COND_REGEXP |
3432 | /* When parsing a regexp as a single word inside a conditional command, | |
3433 | we need to special-case characters special to both the shell and | |
3434 | regular expressions. Right now, that is only '(' and '|'. */ /*)*/ | |
3435 | if MBTEST((parser_state & PST_REGEXP) && (character == '(' || character == '|')) /*)*/ | |
3436 | { | |
3437 | if (character == '|') | |
3438 | goto got_character; | |
3439 | ||
3440 | push_delimiter (dstack, character); | |
3441 | ttok = parse_matched_pair (cd, '(', ')', &ttoklen, 0); | |
3442 | pop_delimiter (dstack); | |
3443 | if (ttok == &matched_pair_error) | |
3444 | return -1; /* Bail immediately. */ | |
3445 | RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 2, | |
3446 | token_buffer_size, TOKEN_DEFAULT_GROW_SIZE); | |
3447 | token[token_index++] = character; | |
3448 | strcpy (token + token_index, ttok); | |
3449 | token_index += ttoklen; | |
3450 | FREE (ttok); | |
3451 | dollar_present = all_digit_token = 0; | |
3452 | goto next_character; | |
3453 | } | |
3454 | #endif /* COND_REGEXP */ | |
3455 | ||
cce855bc JA |
3456 | #ifdef EXTENDED_GLOB |
3457 | /* Parse a ksh-style extended pattern matching specification. */ | |
d3ad40de | 3458 | if MBTEST(extended_glob && PATTERN_CHAR (character)) |
cce855bc JA |
3459 | { |
3460 | peek_char = shell_getc (1); | |
7117c2d2 | 3461 | if MBTEST(peek_char == '(') /* ) */ |
cce855bc JA |
3462 | { |
3463 | push_delimiter (dstack, peek_char); | |
3464 | ttok = parse_matched_pair (cd, '(', ')', &ttoklen, 0); | |
3465 | pop_delimiter (dstack); | |
3466 | if (ttok == &matched_pair_error) | |
3467 | return -1; /* Bail immediately. */ | |
3468 | RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 2, | |
3469 | token_buffer_size, | |
3470 | TOKEN_DEFAULT_GROW_SIZE); | |
3471 | token[token_index++] = character; | |
3472 | token[token_index++] = peek_char; | |
3473 | strcpy (token + token_index, ttok); | |
3474 | token_index += ttoklen; | |
3475 | FREE (ttok); | |
f73dda09 | 3476 | dollar_present = all_digit_token = 0; |
cce855bc JA |
3477 | goto next_character; |
3478 | } | |
3479 | else | |
3480 | shell_ungetc (peek_char); | |
3481 | } | |
3482 | #endif /* EXTENDED_GLOB */ | |
3483 | ||
ccc6cda3 JA |
3484 | /* If the delimiter character is not single quote, parse some of |
3485 | the shell expansions that must be read as a single word. */ | |
28ef6c31 | 3486 | if (shellexp (character)) |
ccc6cda3 JA |
3487 | { |
3488 | peek_char = shell_getc (1); | |
3489 | /* $(...), <(...), >(...), $((...)), ${...}, and $[...] constructs */ | |
7117c2d2 | 3490 | if MBTEST(peek_char == '(' || \ |
ccc6cda3 JA |
3491 | ((peek_char == '{' || peek_char == '[') && character == '$')) /* ) ] } */ |
3492 | { | |
3493 | if (peek_char == '{') /* } */ | |
28ef6c31 | 3494 | ttok = parse_matched_pair (cd, '{', '}', &ttoklen, P_FIRSTCLOSE); |
ccc6cda3 | 3495 | else if (peek_char == '(') /* ) */ |
d166f048 JA |
3496 | { |
3497 | /* XXX - push and pop the `(' as a delimiter for use by | |
3498 | the command-oriented-history code. This way newlines | |
3499 | appearing in the $(...) string get added to the | |
3500 | history literally rather than causing a possibly- | |
bb70624e | 3501 | incorrect `;' to be added. ) */ |
d166f048 | 3502 | push_delimiter (dstack, peek_char); |
f6410766 | 3503 | ttok = parse_matched_pair (cd, '(', ')', &ttoklen, P_COMMAND); |
d166f048 JA |
3504 | pop_delimiter (dstack); |
3505 | } | |
ccc6cda3 JA |
3506 | else |
3507 | ttok = parse_matched_pair (cd, '[', ']', &ttoklen, 0); | |
3508 | if (ttok == &matched_pair_error) | |
3509 | return -1; /* Bail immediately. */ | |
3510 | RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 2, | |
3511 | token_buffer_size, | |
3512 | TOKEN_DEFAULT_GROW_SIZE); | |
3513 | token[token_index++] = character; | |
3514 | token[token_index++] = peek_char; | |
3515 | strcpy (token + token_index, ttok); | |
3516 | token_index += ttoklen; | |
3517 | FREE (ttok); | |
3518 | dollar_present = 1; | |
f73dda09 | 3519 | all_digit_token = 0; |
ccc6cda3 JA |
3520 | goto next_character; |
3521 | } | |
3522 | /* This handles $'...' and $"..." new-style quoted strings. */ | |
7117c2d2 | 3523 | else if MBTEST(character == '$' && (peek_char == '\'' || peek_char == '"')) |
ccc6cda3 | 3524 | { |
cce855bc JA |
3525 | int first_line; |
3526 | ||
3527 | first_line = line_number; | |
bb70624e JA |
3528 | push_delimiter (dstack, peek_char); |
3529 | ttok = parse_matched_pair (peek_char, peek_char, peek_char, | |
3530 | &ttoklen, | |
3531 | (peek_char == '\'') ? P_ALLOWESC : 0); | |
3532 | pop_delimiter (dstack); | |
ccc6cda3 JA |
3533 | if (ttok == &matched_pair_error) |
3534 | return -1; | |
3535 | if (peek_char == '\'') | |
bb70624e JA |
3536 | { |
3537 | ttrans = ansiexpand (ttok, 0, ttoklen - 1, &ttranslen); | |
3538 | free (ttok); | |
c3271763 | 3539 | |
bb70624e JA |
3540 | /* Insert the single quotes and correctly quote any |
3541 | embedded single quotes (allowed because P_ALLOWESC was | |
3542 | passed to parse_matched_pair). */ | |
28ef6c31 | 3543 | ttok = sh_single_quote (ttrans); |
bb70624e | 3544 | free (ttrans); |
c3271763 | 3545 | ttranslen = strlen (ttok); |
bb70624e | 3546 | ttrans = ttok; |
bb70624e | 3547 | } |
ccc6cda3 | 3548 | else |
bb70624e | 3549 | { |
b317c077 | 3550 | /* Try to locale-expand the converted string. */ |
bb70624e JA |
3551 | ttrans = localeexpand (ttok, 0, ttoklen - 1, first_line, &ttranslen); |
3552 | free (ttok); | |
3553 | ||
3554 | /* Add the double quotes back */ | |
c3271763 | 3555 | ttok = sh_mkdoublequoted (ttrans, ttranslen, 0); |
bb70624e | 3556 | free (ttrans); |
c3271763 | 3557 | ttranslen += 2; |
bb70624e JA |
3558 | ttrans = ttok; |
3559 | } | |
3560 | ||
ccc6cda3 JA |
3561 | RESIZE_MALLOCED_BUFFER (token, token_index, ttranslen + 2, |
3562 | token_buffer_size, | |
3563 | TOKEN_DEFAULT_GROW_SIZE); | |
ccc6cda3 JA |
3564 | strcpy (token + token_index, ttrans); |
3565 | token_index += ttranslen; | |
ccc6cda3 JA |
3566 | FREE (ttrans); |
3567 | quoted = 1; | |
f73dda09 | 3568 | all_digit_token = 0; |
ccc6cda3 JA |
3569 | goto next_character; |
3570 | } | |
b72432fd JA |
3571 | /* This could eventually be extended to recognize all of the |
3572 | shell's single-character parameter expansions, and set flags.*/ | |
7117c2d2 | 3573 | else if MBTEST(character == '$' && peek_char == '$') |
b72432fd | 3574 | { |
f73dda09 | 3575 | ttok = (char *)xmalloc (3); |
b72432fd JA |
3576 | ttok[0] = ttok[1] = '$'; |
3577 | ttok[2] = '\0'; | |
3578 | RESIZE_MALLOCED_BUFFER (token, token_index, 3, | |
3579 | token_buffer_size, | |
3580 | TOKEN_DEFAULT_GROW_SIZE); | |
3581 | strcpy (token + token_index, ttok); | |
3582 | token_index += 2; | |
3583 | dollar_present = 1; | |
f73dda09 | 3584 | all_digit_token = 0; |
b72432fd JA |
3585 | FREE (ttok); |
3586 | goto next_character; | |
3587 | } | |
ccc6cda3 JA |
3588 | else |
3589 | shell_ungetc (peek_char); | |
3590 | } | |
726f6388 | 3591 | |
ccc6cda3 | 3592 | #if defined (ARRAY_VARS) |
7117c2d2 JA |
3593 | /* Identify possible array subscript assignment; match [...] */ |
3594 | else if MBTEST(character == '[' && token_index > 0 && assignment_acceptable (last_read_token) && token_is_ident (token, token_index)) /* ] */ | |
3595 | { | |
3596 | ttok = parse_matched_pair (cd, '[', ']', &ttoklen, 0); | |
3597 | if (ttok == &matched_pair_error) | |
3598 | return -1; /* Bail immediately. */ | |
3599 | RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 2, | |
3600 | token_buffer_size, | |
3601 | TOKEN_DEFAULT_GROW_SIZE); | |
3602 | token[token_index++] = character; | |
3603 | strcpy (token + token_index, ttok); | |
3604 | token_index += ttoklen; | |
3605 | FREE (ttok); | |
3606 | all_digit_token = 0; | |
3607 | goto next_character; | |
3608 | } | |
ccc6cda3 | 3609 | /* Identify possible compound array variable assignment. */ |
301e2142 | 3610 | else if MBTEST(character == '=' && token_index > 0 && (assignment_acceptable (last_read_token) || (parser_state & PST_ASSIGNOK)) && token_is_assignment (token, token_index)) |
ccc6cda3 JA |
3611 | { |
3612 | peek_char = shell_getc (1); | |
7117c2d2 | 3613 | if MBTEST(peek_char == '(') /* ) */ |
ccc6cda3 | 3614 | { |
7117c2d2 JA |
3615 | ttok = parse_compound_assignment (&ttoklen); |
3616 | ||
3617 | RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 4, | |
ccc6cda3 JA |
3618 | token_buffer_size, |
3619 | TOKEN_DEFAULT_GROW_SIZE); | |
7117c2d2 JA |
3620 | |
3621 | token[token_index++] = '='; | |
3622 | token[token_index++] = '('; | |
3623 | if (ttok) | |
3624 | { | |
3625 | strcpy (token + token_index, ttok); | |
3626 | token_index += ttoklen; | |
3627 | } | |
3628 | token[token_index++] = ')'; | |
ccc6cda3 | 3629 | FREE (ttok); |
f73dda09 | 3630 | all_digit_token = 0; |
43df7bbb | 3631 | compound_assignment = 1; |
ac18b312 | 3632 | #if 1 |
ccc6cda3 | 3633 | goto next_character; |
43df7bbb CR |
3634 | #else |
3635 | goto got_token; /* ksh93 seems to do this */ | |
3636 | #endif | |
ccc6cda3 JA |
3637 | } |
3638 | else | |
3639 | shell_ungetc (peek_char); | |
3640 | } | |
3641 | #endif | |
726f6388 | 3642 | |
ccc6cda3 JA |
3643 | /* When not parsing a multi-character word construct, shell meta- |
3644 | characters break words. */ | |
7117c2d2 | 3645 | if MBTEST(shellbreak (character)) |
ccc6cda3 JA |
3646 | { |
3647 | shell_ungetc (character); | |
3648 | goto got_token; | |
3649 | } | |
726f6388 | 3650 | |
ccc6cda3 | 3651 | got_character: |
726f6388 | 3652 | |
28157acd CR |
3653 | if (character == CTLESC || character == CTLNUL) |
3654 | token[token_index++] = CTLESC; | |
3655 | ||
d3ad40de CR |
3656 | got_escaped_character: |
3657 | ||
3658 | all_digit_token &= DIGIT (character); | |
3659 | dollar_present |= character == '$'; | |
3660 | ||
ccc6cda3 | 3661 | token[token_index++] = character; |
726f6388 | 3662 | |
ccc6cda3 JA |
3663 | RESIZE_MALLOCED_BUFFER (token, token_index, 1, token_buffer_size, |
3664 | TOKEN_DEFAULT_GROW_SIZE); | |
726f6388 | 3665 | |
ccc6cda3 | 3666 | next_character: |
d3a24ed2 | 3667 | if (character == '\n' && SHOULD_PROMPT ()) |
ccc6cda3 | 3668 | prompt_again (); |
726f6388 | 3669 | |
ccc6cda3 JA |
3670 | /* We want to remove quoted newlines (that is, a \<newline> pair) |
3671 | unless we are within single quotes or pass_next_character is | |
3672 | set (the shell equivalent of literal-next). */ | |
3673 | cd = current_delimiter (dstack); | |
3674 | character = shell_getc (cd != '\'' && pass_next_character == 0); | |
3675 | } /* end for (;;) */ | |
726f6388 | 3676 | |
ccc6cda3 | 3677 | got_token: |
726f6388 | 3678 | |
ccc6cda3 | 3679 | token[token_index] = '\0'; |
726f6388 | 3680 | |
ccc6cda3 JA |
3681 | /* Check to see what thing we should return. If the last_read_token |
3682 | is a `<', or a `&', or the character which ended this token is | |
3683 | a '>' or '<', then, and ONLY then, is this input token a NUMBER. | |
3684 | Otherwise, it is just a word, and should be returned as such. */ | |
7117c2d2 JA |
3685 | if MBTEST(all_digit_token && (character == '<' || character == '>' || \ |
3686 | last_read_token == LESS_AND || \ | |
ccc6cda3 | 3687 | last_read_token == GREATER_AND)) |
726f6388 | 3688 | { |
f73dda09 JA |
3689 | if (legal_number (token, &lvalue) && (int)lvalue == lvalue) |
3690 | yylval.number = lvalue; | |
3691 | else | |
3692 | yylval.number = -1; | |
ccc6cda3 | 3693 | return (NUMBER); |
726f6388 JA |
3694 | } |
3695 | ||
ccc6cda3 | 3696 | /* Check for special case tokens. */ |
7117c2d2 | 3697 | result = (last_shell_getc_is_singlebyte) ? special_case_tokens (token) : -1; |
ccc6cda3 JA |
3698 | if (result >= 0) |
3699 | return result; | |
726f6388 JA |
3700 | |
3701 | #if defined (ALIAS) | |
ccc6cda3 JA |
3702 | /* Posix.2 does not allow reserved words to be aliased, so check for all |
3703 | of them, including special cases, before expanding the current token | |
3704 | as an alias. */ | |
7117c2d2 | 3705 | if MBTEST(posixly_correct) |
ccc6cda3 JA |
3706 | CHECK_FOR_RESERVED_WORD (token); |
3707 | ||
3708 | /* Aliases are expanded iff EXPAND_ALIASES is non-zero, and quoting | |
3709 | inhibits alias expansion. */ | |
3710 | if (expand_aliases && quoted == 0) | |
3711 | { | |
3712 | result = alias_expand_token (token); | |
3713 | if (result == RE_READ_TOKEN) | |
3714 | return (RE_READ_TOKEN); | |
3715 | else if (result == NO_EXPANSION) | |
3716 | parser_state &= ~PST_ALEXPNEXT; | |
3717 | } | |
726f6388 | 3718 | |
ccc6cda3 JA |
3719 | /* If not in Posix.2 mode, check for reserved words after alias |
3720 | expansion. */ | |
7117c2d2 | 3721 | if MBTEST(posixly_correct == 0) |
ccc6cda3 JA |
3722 | #endif |
3723 | CHECK_FOR_RESERVED_WORD (token); | |
3724 | ||
3725 | the_word = (WORD_DESC *)xmalloc (sizeof (WORD_DESC)); | |
f73dda09 | 3726 | the_word->word = (char *)xmalloc (1 + token_index); |
ccc6cda3 JA |
3727 | the_word->flags = 0; |
3728 | strcpy (the_word->word, token); | |
3729 | if (dollar_present) | |
3730 | the_word->flags |= W_HASDOLLAR; | |
3731 | if (quoted) | |
d3ad40de CR |
3732 | the_word->flags |= W_QUOTED; /*(*/ |
3733 | if (compound_assignment && token[token_index-1] == ')') | |
43df7bbb | 3734 | the_word->flags |= W_COMPASSIGN; |
ccc6cda3 JA |
3735 | /* A word is an assignment if it appears at the beginning of a |
3736 | simple command, or after another assignment word. This is | |
3737 | context-dependent, so it cannot be handled in the grammar. */ | |
5e13499c | 3738 | if (assignment (token, (parser_state & PST_COMPASSIGN) != 0)) |
ccc6cda3 JA |
3739 | { |
3740 | the_word->flags |= W_ASSIGNMENT; | |
3741 | /* Don't perform word splitting on assignment statements. */ | |
5e13499c | 3742 | if (assignment_acceptable (last_read_token) || (parser_state & PST_COMPASSIGN) != 0) |
ccc6cda3 JA |
3743 | the_word->flags |= W_NOSPLIT; |
3744 | } | |
726f6388 | 3745 | |
301e2142 CR |
3746 | if (command_token_position (last_read_token)) |
3747 | { | |
3748 | struct builtin *b; | |
3749 | b = builtin_address_internal (token, 0); | |
3750 | if (b && (b->flags & ASSIGNMENT_BUILTIN)) | |
5e4a95c7 CR |
3751 | parser_state |= PST_ASSIGNOK; |
3752 | else if (STREQ (token, "eval") || STREQ (token, "let")) | |
3753 | parser_state |= PST_ASSIGNOK; | |
301e2142 CR |
3754 | } |
3755 | ||
ccc6cda3 | 3756 | yylval.word = the_word; |
726f6388 | 3757 | |
ccc6cda3 JA |
3758 | result = ((the_word->flags & (W_ASSIGNMENT|W_NOSPLIT)) == (W_ASSIGNMENT|W_NOSPLIT)) |
3759 | ? ASSIGNMENT_WORD : WORD; | |
726f6388 | 3760 | |
d3a24ed2 | 3761 | switch (last_read_token) |
ccc6cda3 | 3762 | { |
d3a24ed2 | 3763 | case FUNCTION: |
ccc6cda3 JA |
3764 | parser_state |= PST_ALLOWOPNBRC; |
3765 | function_dstart = line_number; | |
d3a24ed2 CR |
3766 | break; |
3767 | case CASE: | |
3768 | case SELECT: | |
3769 | case FOR: | |
3770 | if (word_top < MAX_CASE_NEST) | |
3771 | word_top++; | |
3772 | word_lineno[word_top] = line_number; | |
3773 | break; | |
ccc6cda3 | 3774 | } |
726f6388 | 3775 | |
ccc6cda3 JA |
3776 | return (result); |
3777 | } | |
726f6388 | 3778 | |
f73dda09 | 3779 | /* Return 1 if TOKSYM is a token that after being read would allow |
726f6388 JA |
3780 | a reserved word to be seen, else 0. */ |
3781 | static int | |
f73dda09 JA |
3782 | reserved_word_acceptable (toksym) |
3783 | int toksym; | |
726f6388 | 3784 | { |
7117c2d2 JA |
3785 | switch (toksym) |
3786 | { | |
3787 | case '\n': | |
3788 | case ';': | |
3789 | case '(': | |
3790 | case ')': | |
3791 | case '|': | |
3792 | case '&': | |
3793 | case '{': | |
3794 | case '}': /* XXX */ | |
3795 | case AND_AND: | |
3796 | case BANG: | |
3797 | case DO: | |
3798 | case DONE: | |
3799 | case ELIF: | |
3800 | case ELSE: | |
3801 | case ESAC: | |
3802 | case FI: | |
3803 | case IF: | |
3804 | case OR_OR: | |
3805 | case SEMI_SEMI: | |
3806 | case THEN: | |
3807 | case TIME: | |
3808 | case TIMEOPT: | |
3809 | case UNTIL: | |
3810 | case WHILE: | |
3811 | case 0: | |
3812 | return 1; | |
3813 | default: | |
3814 | return 0; | |
3815 | } | |
726f6388 | 3816 | } |
7117c2d2 | 3817 | |
726f6388 JA |
3818 | /* Return the index of TOKEN in the alist of reserved words, or -1 if |
3819 | TOKEN is not a shell reserved word. */ | |
3820 | int | |
f73dda09 JA |
3821 | find_reserved_word (tokstr) |
3822 | char *tokstr; | |
726f6388 JA |
3823 | { |
3824 | int i; | |
ccc6cda3 | 3825 | for (i = 0; word_token_alist[i].word; i++) |
f73dda09 | 3826 | if (STREQ (tokstr, word_token_alist[i].word)) |
726f6388 JA |
3827 | return i; |
3828 | return -1; | |
3829 | } | |
3830 | ||
ccc6cda3 | 3831 | #if 0 |
726f6388 JA |
3832 | #if defined (READLINE) |
3833 | /* Called after each time readline is called. This insures that whatever | |
3834 | the new prompt string is gets propagated to readline's local prompt | |
3835 | variable. */ | |
3836 | static void | |
3837 | reset_readline_prompt () | |
3838 | { | |
ccc6cda3 JA |
3839 | char *temp_prompt; |
3840 | ||
726f6388 JA |
3841 | if (prompt_string_pointer) |
3842 | { | |
ccc6cda3 | 3843 | temp_prompt = (*prompt_string_pointer) |
726f6388 JA |
3844 | ? decode_prompt_string (*prompt_string_pointer) |
3845 | : (char *)NULL; | |
3846 | ||
3847 | if (temp_prompt == 0) | |
3848 | { | |
f73dda09 | 3849 | temp_prompt = (char *)xmalloc (1); |
726f6388 JA |
3850 | temp_prompt[0] = '\0'; |
3851 | } | |
3852 | ||
3853 | FREE (current_readline_prompt); | |
726f6388 JA |
3854 | current_readline_prompt = temp_prompt; |
3855 | } | |
3856 | } | |
3857 | #endif /* READLINE */ | |
ccc6cda3 | 3858 | #endif /* 0 */ |
726f6388 JA |
3859 | |
3860 | #if defined (HISTORY) | |
3861 | /* A list of tokens which can be followed by newlines, but not by | |
3862 | semi-colons. When concatenating multiple lines of history, the | |
3863 | newline separator for such tokens is replaced with a space. */ | |
d3ad40de | 3864 | static const int no_semi_successors[] = { |
726f6388 | 3865 | '\n', '{', '(', ')', ';', '&', '|', |
ccc6cda3 | 3866 | CASE, DO, ELSE, IF, SEMI_SEMI, THEN, UNTIL, WHILE, AND_AND, OR_OR, IN, |
726f6388 JA |
3867 | 0 |
3868 | }; | |
3869 | ||
3870 | /* If we are not within a delimited expression, try to be smart | |
3871 | about which separators can be semi-colons and which must be | |
ccc6cda3 JA |
3872 | newlines. Returns the string that should be added into the |
3873 | history entry. */ | |
726f6388 JA |
3874 | char * |
3875 | history_delimiting_chars () | |
3876 | { | |
ccc6cda3 JA |
3877 | register int i; |
3878 | ||
3879 | if (dstack.delimiter_depth != 0) | |
3880 | return ("\n"); | |
3881 | ||
3882 | /* First, handle some special cases. */ | |
3883 | /*(*/ | |
3884 | /* If we just read `()', assume it's a function definition, and don't | |
3885 | add a semicolon. If the token before the `)' was not `(', and we're | |
3886 | not in the midst of parsing a case statement, assume it's a | |
3887 | parenthesized command and add the semicolon. */ | |
3888 | /*)(*/ | |
3889 | if (token_before_that == ')') | |
726f6388 | 3890 | { |
ccc6cda3 JA |
3891 | if (two_tokens_ago == '(') /*)*/ /* function def */ |
3892 | return " "; | |
3893 | /* This does not work for subshells inside case statement | |
3894 | command lists. It's a suboptimal solution. */ | |
3895 | else if (parser_state & PST_CASESTMT) /* case statement pattern */ | |
28ef6c31 | 3896 | return " "; |
ccc6cda3 | 3897 | else |
28ef6c31 | 3898 | return "; "; /* (...) subshell */ |
ccc6cda3 | 3899 | } |
cce855bc JA |
3900 | else if (token_before_that == WORD && two_tokens_ago == FUNCTION) |
3901 | return " "; /* function def using `function name' without `()' */ | |
726f6388 | 3902 | |
bb70624e JA |
3903 | else if (token_before_that == WORD && two_tokens_ago == FOR) |
3904 | { | |
3905 | /* Tricky. `for i\nin ...' should not have a semicolon, but | |
3906 | `for i\ndo ...' should. We do what we can. */ | |
3907 | for (i = shell_input_line_index; whitespace(shell_input_line[i]); i++) | |
28ef6c31 | 3908 | ; |
bb70624e JA |
3909 | if (shell_input_line[i] && shell_input_line[i] == 'i' && shell_input_line[i+1] == 'n') |
3910 | return " "; | |
3911 | return ";"; | |
3912 | } | |
633e5c6d CR |
3913 | else if (two_tokens_ago == CASE && token_before_that == WORD && (parser_state & PST_CASESTMT)) |
3914 | return " "; | |
bb70624e | 3915 | |
ccc6cda3 JA |
3916 | for (i = 0; no_semi_successors[i]; i++) |
3917 | { | |
3918 | if (token_before_that == no_semi_successors[i]) | |
3919 | return (" "); | |
726f6388 | 3920 | } |
ccc6cda3 JA |
3921 | |
3922 | return ("; "); | |
726f6388 JA |
3923 | } |
3924 | #endif /* HISTORY */ | |
3925 | ||
3926 | /* Issue a prompt, or prepare to issue a prompt when the next character | |
3927 | is read. */ | |
3928 | static void | |
3929 | prompt_again () | |
3930 | { | |
3931 | char *temp_prompt; | |
3932 | ||
d3a24ed2 | 3933 | if (interactive == 0 || expanding_alias()) /* XXX */ |
726f6388 JA |
3934 | return; |
3935 | ||
3936 | ps1_prompt = get_string_value ("PS1"); | |
3937 | ps2_prompt = get_string_value ("PS2"); | |
3938 | ||
3939 | if (!prompt_string_pointer) | |
3940 | prompt_string_pointer = &ps1_prompt; | |
3941 | ||
ccc6cda3 | 3942 | temp_prompt = *prompt_string_pointer |
726f6388 JA |
3943 | ? decode_prompt_string (*prompt_string_pointer) |
3944 | : (char *)NULL; | |
3945 | ||
3946 | if (temp_prompt == 0) | |
3947 | { | |
f73dda09 | 3948 | temp_prompt = (char *)xmalloc (1); |
726f6388 JA |
3949 | temp_prompt[0] = '\0'; |
3950 | } | |
3951 | ||
3952 | current_prompt_string = *prompt_string_pointer; | |
3953 | prompt_string_pointer = &ps2_prompt; | |
3954 | ||
3955 | #if defined (READLINE) | |
3956 | if (!no_line_editing) | |
3957 | { | |
3958 | FREE (current_readline_prompt); | |
3959 | current_readline_prompt = temp_prompt; | |
3960 | } | |
3961 | else | |
3962 | #endif /* READLINE */ | |
3963 | { | |
3964 | FREE (current_decoded_prompt); | |
3965 | current_decoded_prompt = temp_prompt; | |
3966 | } | |
3967 | } | |
3968 | ||
bb70624e JA |
3969 | int |
3970 | get_current_prompt_level () | |
3971 | { | |
3972 | return ((current_prompt_string && current_prompt_string == ps2_prompt) ? 2 : 1); | |
3973 | } | |
3974 | ||
3975 | void | |
3976 | set_current_prompt_level (x) | |
3977 | int x; | |
3978 | { | |
3979 | prompt_string_pointer = (x == 2) ? &ps2_prompt : &ps1_prompt; | |
3980 | current_prompt_string = *prompt_string_pointer; | |
3981 | } | |
3982 | ||
726f6388 JA |
3983 | static void |
3984 | print_prompt () | |
3985 | { | |
3986 | fprintf (stderr, "%s", current_decoded_prompt); | |
3987 | fflush (stderr); | |
3988 | } | |
3989 | ||
3990 | /* Return a string which will be printed as a prompt. The string | |
3991 | may contain special characters which are decoded as follows: | |
ccc6cda3 JA |
3992 | |
3993 | \a bell (ascii 07) | |
ccc6cda3 | 3994 | \d the date in Day Mon Date format |
7117c2d2 | 3995 | \e escape (ascii 033) |
ccc6cda3 JA |
3996 | \h the hostname up to the first `.' |
3997 | \H the hostname | |
bb70624e JA |
3998 | \j the number of active jobs |
3999 | \l the basename of the shell's tty device name | |
726f6388 | 4000 | \n CRLF |
7117c2d2 | 4001 | \r CR |
726f6388 | 4002 | \s the name of the shell |
ccc6cda3 JA |
4003 | \t the time in 24-hour hh:mm:ss format |
4004 | \T the time in 12-hour hh:mm:ss format | |
7117c2d2 JA |
4005 | \@ the time in 12-hour hh:mm am/pm format |
4006 | \A the time in 24-hour hh:mm format | |
4007 | \D{fmt} the result of passing FMT to strftime(3) | |
4008 | \u your username | |
ccc6cda3 JA |
4009 | \v the version of bash (e.g., 2.00) |
4010 | \V the release of bash, version + patchlevel (e.g., 2.00.0) | |
726f6388 | 4011 | \w the current working directory |
ccc6cda3 | 4012 | \W the last element of $PWD |
726f6388 | 4013 | \! the history number of this command |
7117c2d2 | 4014 | \# the command number of this command |
726f6388 | 4015 | \$ a $ or a # if you are root |
ccc6cda3 | 4016 | \nnn character code nnn in octal |
726f6388 | 4017 | \\ a backslash |
ccc6cda3 JA |
4018 | \[ begin a sequence of non-printing chars |
4019 | \] end a sequence of non-printing chars | |
726f6388 | 4020 | */ |
d166f048 | 4021 | #define PROMPT_GROWTH 48 |
726f6388 JA |
4022 | char * |
4023 | decode_prompt_string (string) | |
4024 | char *string; | |
4025 | { | |
726f6388 | 4026 | WORD_LIST *list; |
ccc6cda3 JA |
4027 | char *result, *t; |
4028 | struct dstack save_dstack; | |
f73dda09 | 4029 | int last_exit_value; |
726f6388 | 4030 | #if defined (PROMPT_STRING_DECODE) |
ccc6cda3 | 4031 | int result_size, result_index; |
d3ad40de | 4032 | int c, n, i; |
ccc6cda3 | 4033 | char *temp, octal_string[4]; |
7117c2d2 | 4034 | struct tm *tm; |
ccc6cda3 | 4035 | time_t the_time; |
7117c2d2 JA |
4036 | char timebuf[128]; |
4037 | char *timefmt; | |
726f6388 | 4038 | |
f73dda09 | 4039 | result = (char *)xmalloc (result_size = PROMPT_GROWTH); |
ccc6cda3 JA |
4040 | result[result_index = 0] = 0; |
4041 | temp = (char *)NULL; | |
726f6388 JA |
4042 | |
4043 | while (c = *string++) | |
4044 | { | |
4045 | if (posixly_correct && c == '!') | |
4046 | { | |
4047 | if (*string == '!') | |
4048 | { | |
4049 | temp = savestring ("!"); | |
4050 | goto add_string; | |
4051 | } | |
4052 | else | |
4053 | { | |
4054 | #if !defined (HISTORY) | |
4055 | temp = savestring ("1"); | |
4056 | #else /* HISTORY */ | |
4057 | temp = itos (history_number ()); | |
4058 | #endif /* HISTORY */ | |
4059 | string--; /* add_string increments string again. */ | |
4060 | goto add_string; | |
4061 | } | |
ccc6cda3 | 4062 | } |
726f6388 JA |
4063 | if (c == '\\') |
4064 | { | |
4065 | c = *string; | |
4066 | ||
4067 | switch (c) | |
4068 | { | |
4069 | case '0': | |
4070 | case '1': | |
4071 | case '2': | |
4072 | case '3': | |
4073 | case '4': | |
4074 | case '5': | |
4075 | case '6': | |
4076 | case '7': | |
ccc6cda3 JA |
4077 | strncpy (octal_string, string, 3); |
4078 | octal_string[3] = '\0'; | |
726f6388 | 4079 | |
ccc6cda3 | 4080 | n = read_octal (octal_string); |
f73dda09 | 4081 | temp = (char *)xmalloc (3); |
726f6388 | 4082 | |
ccc6cda3 JA |
4083 | if (n == CTLESC || n == CTLNUL) |
4084 | { | |
ccc6cda3 JA |
4085 | temp[0] = CTLESC; |
4086 | temp[1] = n; | |
4087 | temp[2] = '\0'; | |
4088 | } | |
4089 | else if (n == -1) | |
4090 | { | |
4091 | temp[0] = '\\'; | |
4092 | temp[1] = '\0'; | |
4093 | } | |
4094 | else | |
4095 | { | |
ccc6cda3 JA |
4096 | temp[0] = n; |
4097 | temp[1] = '\0'; | |
4098 | } | |
726f6388 | 4099 | |
28ef6c31 JA |
4100 | for (c = 0; n != -1 && c < 3 && ISOCTAL (*string); c++) |
4101 | string++; | |
4102 | ||
7117c2d2 | 4103 | c = 0; /* tested at add_string: */ |
ccc6cda3 | 4104 | goto add_string; |
726f6388 | 4105 | |
726f6388 | 4106 | case 'd': |
7117c2d2 | 4107 | case 't': |
ccc6cda3 JA |
4108 | case 'T': |
4109 | case '@': | |
f73dda09 | 4110 | case 'A': |
726f6388 | 4111 | /* Make the current time/date into a string. */ |
7117c2d2 JA |
4112 | (void) time (&the_time); |
4113 | tm = localtime (&the_time); | |
4114 | ||
4115 | if (c == 'd') | |
4116 | n = strftime (timebuf, sizeof (timebuf), "%a %b %d", tm); | |
4117 | else if (c == 't') | |
4118 | n = strftime (timebuf, sizeof (timebuf), "%H:%M:%S", tm); | |
4119 | else if (c == 'T') | |
4120 | n = strftime (timebuf, sizeof (timebuf), "%I:%M:%S", tm); | |
4121 | else if (c == '@') | |
4122 | n = strftime (timebuf, sizeof (timebuf), "%I:%M %p", tm); | |
4123 | else if (c == 'A') | |
4124 | n = strftime (timebuf, sizeof (timebuf), "%H:%M", tm); | |
4125 | ||
c2258e1c CR |
4126 | if (n == 0) |
4127 | timebuf[0] = '\0'; | |
4128 | else | |
4129 | timebuf[sizeof(timebuf) - 1] = '\0'; | |
4130 | ||
7117c2d2 JA |
4131 | temp = savestring (timebuf); |
4132 | goto add_string; | |
726f6388 | 4133 | |
7117c2d2 JA |
4134 | case 'D': /* strftime format */ |
4135 | if (string[1] != '{') /* } */ | |
4136 | goto not_escape; | |
726f6388 | 4137 | |
7117c2d2 JA |
4138 | (void) time (&the_time); |
4139 | tm = localtime (&the_time); | |
4140 | string += 2; /* skip { */ | |
4141 | timefmt = xmalloc (strlen (string) + 3); | |
4142 | for (t = timefmt; *string && *string != '}'; ) | |
4143 | *t++ = *string++; | |
4144 | *t = '\0'; | |
4145 | c = *string; /* tested at add_string */ | |
4146 | if (timefmt[0] == '\0') | |
ccc6cda3 | 4147 | { |
7117c2d2 JA |
4148 | timefmt[0] = '%'; |
4149 | timefmt[1] = 'X'; /* locale-specific current time */ | |
4150 | timefmt[2] = '\0'; | |
ccc6cda3 | 4151 | } |
7117c2d2 JA |
4152 | n = strftime (timebuf, sizeof (timebuf), timefmt, tm); |
4153 | free (timefmt); | |
4154 | ||
c2258e1c CR |
4155 | if (n == 0) |
4156 | timebuf[0] = '\0'; | |
4157 | else | |
4158 | timebuf[sizeof(timebuf) - 1] = '\0'; | |
4159 | ||
7117c2d2 JA |
4160 | if (promptvars || posixly_correct) |
4161 | /* Make sure that expand_prompt_string is called with a | |
4162 | second argument of Q_DOUBLE_QUOTES if we use this | |
4163 | function here. */ | |
4164 | temp = sh_backslash_quote_for_double_quotes (timebuf); | |
4165 | else | |
4166 | temp = savestring (timebuf); | |
ccc6cda3 | 4167 | goto add_string; |
7117c2d2 | 4168 | |
726f6388 | 4169 | case 'n': |
f73dda09 | 4170 | temp = (char *)xmalloc (3); |
ccc6cda3 JA |
4171 | temp[0] = no_line_editing ? '\n' : '\r'; |
4172 | temp[1] = no_line_editing ? '\0' : '\n'; | |
4173 | temp[2] = '\0'; | |
726f6388 JA |
4174 | goto add_string; |
4175 | ||
4176 | case 's': | |
ccc6cda3 JA |
4177 | temp = base_pathname (shell_name); |
4178 | temp = savestring (temp); | |
4179 | goto add_string; | |
4180 | ||
4181 | case 'v': | |
4182 | case 'V': | |
7117c2d2 | 4183 | temp = (char *)xmalloc (16); |
ccc6cda3 JA |
4184 | if (c == 'v') |
4185 | strcpy (temp, dist_version); | |
4186 | else | |
4187 | sprintf (temp, "%s.%d", dist_version, patch_level); | |
4188 | goto add_string; | |
4189 | ||
726f6388 JA |
4190 | case 'w': |
4191 | case 'W': | |
4192 | { | |
ccc6cda3 | 4193 | /* Use the value of PWD because it is much more efficient. */ |
d3ad40de | 4194 | char t_string[PATH_MAX]; |
e8ce775d | 4195 | int tlen; |
726f6388 JA |
4196 | |
4197 | temp = get_string_value ("PWD"); | |
4198 | ||
ccc6cda3 JA |
4199 | if (temp == 0) |
4200 | { | |
4201 | if (getcwd (t_string, sizeof(t_string)) == 0) | |
4202 | { | |
28ef6c31 | 4203 | t_string[0] = '.'; |
e8ce775d | 4204 | tlen = 1; |
ccc6cda3 | 4205 | } |
e8ce775d JA |
4206 | else |
4207 | tlen = strlen (t_string); | |
ccc6cda3 | 4208 | } |
726f6388 | 4209 | else |
e8ce775d JA |
4210 | { |
4211 | tlen = sizeof (t_string) - 1; | |
4212 | strncpy (t_string, temp, tlen); | |
4213 | } | |
4214 | t_string[tlen] = '\0'; | |
726f6388 | 4215 | |
28ef6c31 JA |
4216 | #define ROOT_PATH(x) ((x)[0] == '/' && (x)[1] == 0) |
4217 | #define DOUBLE_SLASH_ROOT(x) ((x)[0] == '/' && (x)[1] == '/' && (x)[2] == 0) | |
12d937f9 | 4218 | /* Abbreviate \W as ~ if $PWD == $HOME */ |
3ee6b87d | 4219 | if (c == 'W' && (((t = get_string_value ("HOME")) == 0) || STREQ (t, t_string) == 0)) |
726f6388 | 4220 | { |
28ef6c31 JA |
4221 | if (ROOT_PATH (t_string) == 0 && DOUBLE_SLASH_ROOT (t_string) == 0) |
4222 | { | |
4223 | t = strrchr (t_string, '/'); | |
4224 | if (t) | |
4225 | strcpy (t_string, t + 1); | |
4226 | } | |
726f6388 | 4227 | } |
28ef6c31 JA |
4228 | #undef ROOT_PATH |
4229 | #undef DOUBLE_SLASH_ROOT | |
726f6388 | 4230 | else |
e8ce775d JA |
4231 | /* polite_directory_format is guaranteed to return a string |
4232 | no longer than PATH_MAX - 1 characters. */ | |
ccc6cda3 JA |
4233 | strcpy (t_string, polite_directory_format (t_string)); |
4234 | ||
4235 | /* If we're going to be expanding the prompt string later, | |
4236 | quote the directory name. */ | |
4237 | if (promptvars || posixly_correct) | |
bb70624e | 4238 | /* Make sure that expand_prompt_string is called with a |
7117c2d2 | 4239 | second argument of Q_DOUBLE_QUOTES if we use this |
bb70624e | 4240 | function here. */ |
28ef6c31 | 4241 | temp = sh_backslash_quote_for_double_quotes (t_string); |
ccc6cda3 JA |
4242 | else |
4243 | temp = savestring (t_string); | |
4244 | ||
726f6388 JA |
4245 | goto add_string; |
4246 | } | |
ccc6cda3 | 4247 | |
726f6388 | 4248 | case 'u': |
bb70624e JA |
4249 | if (current_user.user_name == 0) |
4250 | get_current_user_info (); | |
ccc6cda3 JA |
4251 | temp = savestring (current_user.user_name); |
4252 | goto add_string; | |
726f6388 JA |
4253 | |
4254 | case 'h': | |
ccc6cda3 JA |
4255 | case 'H': |
4256 | temp = savestring (current_host_name); | |
4257 | if (c == 'h' && (t = (char *)strchr (temp, '.'))) | |
4258 | *t = '\0'; | |
4259 | goto add_string; | |
726f6388 JA |
4260 | |
4261 | case '#': | |
ccc6cda3 JA |
4262 | temp = itos (current_command_number); |
4263 | goto add_string; | |
726f6388 JA |
4264 | |
4265 | case '!': | |
726f6388 | 4266 | #if !defined (HISTORY) |
ccc6cda3 | 4267 | temp = savestring ("1"); |
726f6388 | 4268 | #else /* HISTORY */ |
ccc6cda3 | 4269 | temp = itos (history_number ()); |
726f6388 | 4270 | #endif /* HISTORY */ |
ccc6cda3 | 4271 | goto add_string; |
726f6388 JA |
4272 | |
4273 | case '$': | |
f73dda09 | 4274 | t = temp = (char *)xmalloc (3); |
b72432fd JA |
4275 | if ((promptvars || posixly_correct) && (current_user.euid != 0)) |
4276 | *t++ = '\\'; | |
4277 | *t++ = current_user.euid == 0 ? '#' : '$'; | |
4278 | *t = '\0'; | |
726f6388 JA |
4279 | goto add_string; |
4280 | ||
bb70624e JA |
4281 | case 'j': |
4282 | temp = itos (count_all_jobs ()); | |
4283 | goto add_string; | |
4284 | ||
4285 | case 'l': | |
4286 | #if defined (HAVE_TTYNAME) | |
4287 | temp = (char *)ttyname (fileno (stdin)); | |
4288 | t = temp ? base_pathname (temp) : "tty"; | |
4289 | temp = savestring (t); | |
4290 | #else | |
4291 | temp = savestring ("tty"); | |
4292 | #endif /* !HAVE_TTYNAME */ | |
4293 | goto add_string; | |
4294 | ||
726f6388 JA |
4295 | #if defined (READLINE) |
4296 | case '[': | |
4297 | case ']': | |
d3a24ed2 CR |
4298 | if (no_line_editing) |
4299 | { | |
4300 | string++; | |
4301 | break; | |
4302 | } | |
f73dda09 | 4303 | temp = (char *)xmalloc (3); |
d3ad40de CR |
4304 | n = (c == '[') ? RL_PROMPT_START_IGNORE : RL_PROMPT_END_IGNORE; |
4305 | i = 0; | |
4306 | if (n == CTLESC || n == CTLNUL) | |
4307 | temp[i++] = CTLESC; | |
4308 | temp[i++] = n; | |
4309 | temp[i] = '\0'; | |
726f6388 | 4310 | goto add_string; |
ccc6cda3 | 4311 | #endif /* READLINE */ |
726f6388 JA |
4312 | |
4313 | case '\\': | |
ccc6cda3 JA |
4314 | case 'a': |
4315 | case 'e': | |
7117c2d2 | 4316 | case 'r': |
f73dda09 | 4317 | temp = (char *)xmalloc (2); |
7117c2d2 JA |
4318 | if (c == 'a') |
4319 | temp[0] = '\07'; | |
4320 | else if (c == 'e') | |
4321 | temp[0] = '\033'; | |
4322 | else if (c == 'r') | |
4323 | temp[0] = '\r'; | |
4324 | else /* (c == '\\') */ | |
4325 | temp[0] = c; | |
ccc6cda3 | 4326 | temp[1] = '\0'; |
726f6388 JA |
4327 | goto add_string; |
4328 | ||
4329 | default: | |
7117c2d2 | 4330 | not_escape: |
f73dda09 | 4331 | temp = (char *)xmalloc (3); |
ccc6cda3 | 4332 | temp[0] = '\\'; |
726f6388 | 4333 | temp[1] = c; |
ccc6cda3 | 4334 | temp[2] = '\0'; |
726f6388 JA |
4335 | |
4336 | add_string: | |
4337 | if (c) | |
4338 | string++; | |
4339 | result = | |
4340 | sub_append_string (temp, result, &result_index, &result_size); | |
ccc6cda3 | 4341 | temp = (char *)NULL; /* Freed in sub_append_string (). */ |
726f6388 JA |
4342 | result[result_index] = '\0'; |
4343 | break; | |
4344 | } | |
4345 | } | |
4346 | else | |
4347 | { | |
ccc6cda3 | 4348 | RESIZE_MALLOCED_BUFFER (result, result_index, 3, result_size, PROMPT_GROWTH); |
726f6388 JA |
4349 | result[result_index++] = c; |
4350 | result[result_index] = '\0'; | |
4351 | } | |
4352 | } | |
4353 | #else /* !PROMPT_STRING_DECODE */ | |
4354 | result = savestring (string); | |
4355 | #endif /* !PROMPT_STRING_DECODE */ | |
4356 | ||
ccc6cda3 JA |
4357 | /* Save the delimiter stack and point `dstack' to temp space so any |
4358 | command substitutions in the prompt string won't result in screwing | |
4359 | up the parser's quoting state. */ | |
4360 | save_dstack = dstack; | |
4361 | dstack = temp_dstack; | |
4362 | dstack.delimiter_depth = 0; | |
4363 | ||
726f6388 JA |
4364 | /* Perform variable and parameter expansion and command substitution on |
4365 | the prompt string. */ | |
ccc6cda3 JA |
4366 | if (promptvars || posixly_correct) |
4367 | { | |
f73dda09 | 4368 | last_exit_value = last_command_exit_value; |
bb70624e | 4369 | list = expand_prompt_string (result, Q_DOUBLE_QUOTES); |
ccc6cda3 JA |
4370 | free (result); |
4371 | result = string_list (list); | |
4372 | dispose_words (list); | |
f73dda09 | 4373 | last_command_exit_value = last_exit_value; |
ccc6cda3 JA |
4374 | } |
4375 | else | |
4376 | { | |
4377 | t = dequote_string (result); | |
4378 | free (result); | |
4379 | result = t; | |
4380 | } | |
4381 | ||
4382 | dstack = save_dstack; | |
726f6388 JA |
4383 | |
4384 | return (result); | |
4385 | } | |
4386 | ||
7117c2d2 JA |
4387 | /************************************************ |
4388 | * * | |
4389 | * ERROR HANDLING * | |
4390 | * * | |
4391 | ************************************************/ | |
4392 | ||
726f6388 JA |
4393 | /* Report a syntax error, and restart the parser. Call here for fatal |
4394 | errors. */ | |
ccc6cda3 | 4395 | int |
f73dda09 JA |
4396 | yyerror (msg) |
4397 | const char *msg; | |
726f6388 JA |
4398 | { |
4399 | report_syntax_error ((char *)NULL); | |
4400 | reset_parser (); | |
ccc6cda3 | 4401 | return (0); |
726f6388 JA |
4402 | } |
4403 | ||
7117c2d2 | 4404 | static char * |
d3ad40de CR |
4405 | error_token_from_token (tok) |
4406 | int tok; | |
7117c2d2 JA |
4407 | { |
4408 | char *t; | |
4409 | ||
d3ad40de | 4410 | if (t = find_token_in_alist (tok, word_token_alist, 0)) |
7117c2d2 JA |
4411 | return t; |
4412 | ||
d3ad40de | 4413 | if (t = find_token_in_alist (tok, other_token_alist, 0)) |
7117c2d2 JA |
4414 | return t; |
4415 | ||
4416 | t = (char *)NULL; | |
4417 | /* This stuff is dicy and needs closer inspection */ | |
4418 | switch (current_token) | |
4419 | { | |
4420 | case WORD: | |
4421 | case ASSIGNMENT_WORD: | |
4422 | if (yylval.word) | |
4423 | t = savestring (yylval.word->word); | |
4424 | break; | |
4425 | case NUMBER: | |
4426 | t = itos (yylval.number); | |
4427 | break; | |
4428 | case ARITH_CMD: | |
4429 | if (yylval.word_list) | |
4430 | t = string_list (yylval.word_list); | |
4431 | break; | |
4432 | case ARITH_FOR_EXPRS: | |
4433 | if (yylval.word_list) | |
4434 | t = string_list_internal (yylval.word_list, " ; "); | |
4435 | break; | |
4436 | case COND_CMD: | |
4437 | t = (char *)NULL; /* punt */ | |
4438 | break; | |
4439 | } | |
4440 | ||
4441 | return t; | |
4442 | } | |
4443 | ||
4444 | static char * | |
4445 | error_token_from_text () | |
4446 | { | |
4447 | char *msg, *t; | |
4448 | int token_end, i; | |
4449 | ||
4450 | t = shell_input_line; | |
4451 | i = shell_input_line_index; | |
4452 | token_end = 0; | |
4453 | msg = (char *)NULL; | |
4454 | ||
4455 | if (i && t[i] == '\0') | |
4456 | i--; | |
4457 | ||
4458 | while (i && (whitespace (t[i]) || t[i] == '\n')) | |
4459 | i--; | |
4460 | ||
4461 | if (i) | |
4462 | token_end = i + 1; | |
4463 | ||
4464 | while (i && (member (t[i], " \n\t;|&") == 0)) | |
4465 | i--; | |
4466 | ||
4467 | while (i != token_end && (whitespace (t[i]) || t[i] == '\n')) | |
4468 | i++; | |
4469 | ||
4470 | /* Return our idea of the offending token. */ | |
4471 | if (token_end || (i == 0 && token_end == 0)) | |
4472 | { | |
4473 | if (token_end) | |
4474 | msg = substring (t, i, token_end); | |
4475 | else /* one-character token */ | |
4476 | { | |
4477 | msg = (char *)xmalloc (2); | |
4478 | msg[0] = t[i]; | |
4479 | msg[1] = '\0'; | |
4480 | } | |
4481 | } | |
4482 | ||
4483 | return (msg); | |
4484 | } | |
4485 | ||
4486 | static void | |
4487 | print_offending_line () | |
4488 | { | |
4489 | char *msg; | |
4490 | int token_end; | |
4491 | ||
4492 | msg = savestring (shell_input_line); | |
4493 | token_end = strlen (msg); | |
4494 | while (token_end && msg[token_end - 1] == '\n') | |
4495 | msg[--token_end] = '\0'; | |
4496 | ||
4497 | parser_error (line_number, "`%s'", msg); | |
4498 | free (msg); | |
4499 | } | |
4500 | ||
726f6388 JA |
4501 | /* Report a syntax error with line numbers, etc. |
4502 | Call here for recoverable errors. If you have a message to print, | |
4503 | then place it in MESSAGE, otherwise pass NULL and this will figure | |
4504 | out an appropriate message for you. */ | |
4505 | static void | |
4506 | report_syntax_error (message) | |
4507 | char *message; | |
4508 | { | |
7117c2d2 | 4509 | char *msg; |
ccc6cda3 | 4510 | |
726f6388 JA |
4511 | if (message) |
4512 | { | |
ccc6cda3 JA |
4513 | parser_error (line_number, "%s", message); |
4514 | if (interactive && EOF_Reached) | |
4515 | EOF_Reached = 0; | |
726f6388 JA |
4516 | last_command_exit_value = EX_USAGE; |
4517 | return; | |
4518 | } | |
4519 | ||
ccc6cda3 | 4520 | /* If the line of input we're reading is not null, try to find the |
7117c2d2 JA |
4521 | objectionable token. First, try to figure out what token the |
4522 | parser's complaining about by looking at current_token. */ | |
4523 | if (current_token != 0 && EOF_Reached == 0 && (msg = error_token_from_token (current_token))) | |
726f6388 | 4524 | { |
5e13499c | 4525 | parser_error (line_number, _("syntax error near unexpected token `%s'"), msg); |
7117c2d2 | 4526 | free (msg); |
726f6388 | 4527 | |
7117c2d2 JA |
4528 | if (interactive == 0) |
4529 | print_offending_line (); | |
726f6388 | 4530 | |
7117c2d2 JA |
4531 | last_command_exit_value = EX_USAGE; |
4532 | return; | |
4533 | } | |
726f6388 | 4534 | |
7117c2d2 JA |
4535 | /* If looking at the current token doesn't prove fruitful, try to find the |
4536 | offending token by analyzing the text of the input line near the current | |
4537 | input line index and report what we find. */ | |
4538 | if (shell_input_line && *shell_input_line) | |
4539 | { | |
4540 | msg = error_token_from_text (); | |
4541 | if (msg) | |
726f6388 | 4542 | { |
5e13499c | 4543 | parser_error (line_number, _("syntax error near `%s'"), msg); |
7117c2d2 | 4544 | free (msg); |
726f6388 JA |
4545 | } |
4546 | ||
ccc6cda3 JA |
4547 | /* If not interactive, print the line containing the error. */ |
4548 | if (interactive == 0) | |
7117c2d2 | 4549 | print_offending_line (); |
726f6388 JA |
4550 | } |
4551 | else | |
4552 | { | |
5e13499c | 4553 | msg = EOF_Reached ? _("syntax error: unexpected end of file") : _("syntax error"); |
ccc6cda3 JA |
4554 | parser_error (line_number, "%s", msg); |
4555 | /* When the shell is interactive, this file uses EOF_Reached | |
4556 | only for error reporting. Other mechanisms are used to | |
4557 | decide whether or not to exit. */ | |
4558 | if (interactive && EOF_Reached) | |
4559 | EOF_Reached = 0; | |
726f6388 | 4560 | } |
7117c2d2 | 4561 | |
726f6388 JA |
4562 | last_command_exit_value = EX_USAGE; |
4563 | } | |
4564 | ||
4565 | /* ??? Needed function. ??? We have to be able to discard the constructs | |
4566 | created during parsing. In the case of error, we want to return | |
4567 | allocated objects to the memory pool. In the case of no error, we want | |
4568 | to throw away the information about where the allocated objects live. | |
7117c2d2 | 4569 | (dispose_command () will actually free the command.) */ |
ccc6cda3 | 4570 | static void |
726f6388 JA |
4571 | discard_parser_constructs (error_p) |
4572 | int error_p; | |
4573 | { | |
4574 | } | |
ccc6cda3 | 4575 | |
7117c2d2 JA |
4576 | /************************************************ |
4577 | * * | |
4578 | * EOF HANDLING * | |
4579 | * * | |
4580 | ************************************************/ | |
4581 | ||
726f6388 JA |
4582 | /* Do that silly `type "bye" to exit' stuff. You know, "ignoreeof". */ |
4583 | ||
4584 | /* A flag denoting whether or not ignoreeof is set. */ | |
4585 | int ignoreeof = 0; | |
4586 | ||
4587 | /* The number of times that we have encountered an EOF character without | |
4588 | another character intervening. When this gets above the limit, the | |
4589 | shell terminates. */ | |
4590 | int eof_encountered = 0; | |
4591 | ||
4592 | /* The limit for eof_encountered. */ | |
4593 | int eof_encountered_limit = 10; | |
4594 | ||
4595 | /* If we have EOF as the only input unit, this user wants to leave | |
4596 | the shell. If the shell is not interactive, then just leave. | |
4597 | Otherwise, if ignoreeof is set, and we haven't done this the | |
4598 | required number of times in a row, print a message. */ | |
4599 | static void | |
4600 | handle_eof_input_unit () | |
4601 | { | |
4602 | if (interactive) | |
4603 | { | |
4604 | /* shell.c may use this to decide whether or not to write out the | |
4605 | history, among other things. We use it only for error reporting | |
4606 | in this file. */ | |
4607 | if (EOF_Reached) | |
4608 | EOF_Reached = 0; | |
4609 | ||
4610 | /* If the user wants to "ignore" eof, then let her do so, kind of. */ | |
4611 | if (ignoreeof) | |
4612 | { | |
4613 | if (eof_encountered < eof_encountered_limit) | |
4614 | { | |
5e13499c | 4615 | fprintf (stderr, _("Use \"%s\" to leave the shell.\n"), |
726f6388 JA |
4616 | login_shell ? "logout" : "exit"); |
4617 | eof_encountered++; | |
7117c2d2 JA |
4618 | /* Reset the parsing state. */ |
4619 | last_read_token = current_token = '\n'; | |
726f6388 JA |
4620 | /* Reset the prompt string to be $PS1. */ |
4621 | prompt_string_pointer = (char **)NULL; | |
4622 | prompt_again (); | |
726f6388 | 4623 | return; |
ccc6cda3 | 4624 | } |
726f6388 JA |
4625 | } |
4626 | ||
4627 | /* In this case EOF should exit the shell. Do it now. */ | |
4628 | reset_parser (); | |
4629 | exit_builtin ((WORD_LIST *)NULL); | |
4630 | } | |
4631 | else | |
4632 | { | |
4633 | /* We don't write history files, etc., for non-interactive shells. */ | |
4634 | EOF_Reached = 1; | |
4635 | } | |
4636 | } | |
bb70624e | 4637 | |
7117c2d2 JA |
4638 | /************************************************ |
4639 | * * | |
4640 | * STRING PARSING FUNCTIONS * | |
4641 | * * | |
4642 | ************************************************/ | |
4643 | ||
4644 | /* It's very important that these two functions treat the characters | |
4645 | between ( and ) identically. */ | |
4646 | ||
bb70624e JA |
4647 | static WORD_LIST parse_string_error; |
4648 | ||
4649 | /* Take a string and run it through the shell parser, returning the | |
4650 | resultant word list. Used by compound array assignment. */ | |
4651 | WORD_LIST * | |
5e13499c | 4652 | parse_string_to_word_list (s, flags, whom) |
f73dda09 | 4653 | char *s; |
5e13499c | 4654 | int flags; |
f73dda09 | 4655 | const char *whom; |
bb70624e JA |
4656 | { |
4657 | WORD_LIST *wl; | |
7117c2d2 | 4658 | int tok, orig_current_token, orig_line_number, orig_input_terminator; |
28ef6c31 | 4659 | int orig_line_count; |
7117c2d2 | 4660 | int old_echo_input, old_expand_aliases; |
bb70624e JA |
4661 | #if defined (HISTORY) |
4662 | int old_remember_on_history, old_history_expansion_inhibited; | |
4663 | #endif | |
4664 | ||
4665 | #if defined (HISTORY) | |
4666 | old_remember_on_history = remember_on_history; | |
4667 | # if defined (BANG_HISTORY) | |
4668 | old_history_expansion_inhibited = history_expansion_inhibited; | |
4669 | # endif | |
4670 | bash_history_disable (); | |
4671 | #endif | |
4672 | ||
4673 | orig_line_number = line_number; | |
28ef6c31 | 4674 | orig_line_count = current_command_line_count; |
bb70624e | 4675 | orig_input_terminator = shell_input_line_terminator; |
7117c2d2 JA |
4676 | old_echo_input = echo_input_at_read; |
4677 | old_expand_aliases = expand_aliases; | |
bb70624e JA |
4678 | |
4679 | push_stream (1); | |
7117c2d2 | 4680 | last_read_token = WORD; /* WORD to allow reserved words here */ |
28ef6c31 | 4681 | current_command_line_count = 0; |
7117c2d2 | 4682 | echo_input_at_read = expand_aliases = 0; |
bb70624e JA |
4683 | |
4684 | with_input_from_string (s, whom); | |
4685 | wl = (WORD_LIST *)NULL; | |
5e13499c CR |
4686 | |
4687 | if (flags & 1) | |
4688 | parser_state |= PST_COMPASSIGN; | |
4689 | ||
bb70624e JA |
4690 | while ((tok = read_token (READ)) != yacc_EOF) |
4691 | { | |
4692 | if (tok == '\n' && *bash_input.location.string == '\0') | |
4693 | break; | |
28ef6c31 JA |
4694 | if (tok == '\n') /* Allow newlines in compound assignments */ |
4695 | continue; | |
bb70624e JA |
4696 | if (tok != WORD && tok != ASSIGNMENT_WORD) |
4697 | { | |
4698 | line_number = orig_line_number + line_number - 1; | |
7117c2d2 JA |
4699 | orig_current_token = current_token; |
4700 | current_token = tok; | |
9607141c | 4701 | yyerror (NULL); /* does the right thing */ |
7117c2d2 | 4702 | current_token = orig_current_token; |
bb70624e JA |
4703 | if (wl) |
4704 | dispose_words (wl); | |
4705 | wl = &parse_string_error; | |
4706 | break; | |
4707 | } | |
4708 | wl = make_word_list (yylval.word, wl); | |
4709 | } | |
4710 | ||
4711 | last_read_token = '\n'; | |
4712 | pop_stream (); | |
4713 | ||
4714 | #if defined (HISTORY) | |
4715 | remember_on_history = old_remember_on_history; | |
4716 | # if defined (BANG_HISTORY) | |
4717 | history_expansion_inhibited = old_history_expansion_inhibited; | |
4718 | # endif /* BANG_HISTORY */ | |
4719 | #endif /* HISTORY */ | |
4720 | ||
7117c2d2 JA |
4721 | echo_input_at_read = old_echo_input; |
4722 | expand_aliases = old_expand_aliases; | |
4723 | ||
28ef6c31 | 4724 | current_command_line_count = orig_line_count; |
bb70624e JA |
4725 | shell_input_line_terminator = orig_input_terminator; |
4726 | ||
5e13499c CR |
4727 | if (flags & 1) |
4728 | parser_state &= ~PST_COMPASSIGN; | |
4729 | ||
bb70624e JA |
4730 | if (wl == &parse_string_error) |
4731 | { | |
4732 | last_command_exit_value = EXECUTION_FAILURE; | |
4733 | if (interactive_shell == 0 && posixly_correct) | |
4734 | jump_to_top_level (FORCE_EOF); | |
4735 | else | |
4736 | jump_to_top_level (DISCARD); | |
4737 | } | |
4738 | ||
4739 | return (REVERSE_LIST (wl, WORD_LIST *)); | |
4740 | } | |
7117c2d2 JA |
4741 | |
4742 | static char * | |
4743 | parse_compound_assignment (retlenp) | |
4744 | int *retlenp; | |
4745 | { | |
4746 | WORD_LIST *wl, *rl; | |
5e4a95c7 | 4747 | int tok, orig_line_number, orig_token_size, orig_last_token, assignok; |
7117c2d2 JA |
4748 | char *saved_token, *ret; |
4749 | ||
4750 | saved_token = token; | |
4751 | orig_token_size = token_buffer_size; | |
4752 | orig_line_number = line_number; | |
5e4a95c7 | 4753 | orig_last_token = last_read_token; |
7117c2d2 JA |
4754 | |
4755 | last_read_token = WORD; /* WORD to allow reserved words here */ | |
4756 | ||
4757 | token = (char *)NULL; | |
4758 | token_buffer_size = 0; | |
4759 | ||
5e4a95c7 CR |
4760 | assignok = parser_state&PST_ASSIGNOK; /* XXX */ |
4761 | ||
7117c2d2 | 4762 | wl = (WORD_LIST *)NULL; /* ( */ |
5e13499c CR |
4763 | parser_state |= PST_COMPASSIGN; |
4764 | ||
7117c2d2 JA |
4765 | while ((tok = read_token (READ)) != ')') |
4766 | { | |
4767 | if (tok == '\n') /* Allow newlines in compound assignments */ | |
5e13499c CR |
4768 | { |
4769 | if (SHOULD_PROMPT ()) | |
4770 | prompt_again (); | |
4771 | continue; | |
4772 | } | |
7117c2d2 JA |
4773 | if (tok != WORD && tok != ASSIGNMENT_WORD) |
4774 | { | |
4775 | current_token = tok; /* for error reporting */ | |
4776 | if (tok == yacc_EOF) /* ( */ | |
5e13499c | 4777 | parser_error (orig_line_number, _("unexpected EOF while looking for matching `)'")); |
7117c2d2 | 4778 | else |
9607141c | 4779 | yyerror(NULL); /* does the right thing */ |
7117c2d2 JA |
4780 | if (wl) |
4781 | dispose_words (wl); | |
4782 | wl = &parse_string_error; | |
4783 | break; | |
4784 | } | |
4785 | wl = make_word_list (yylval.word, wl); | |
4786 | } | |
4787 | ||
4788 | FREE (token); | |
4789 | token = saved_token; | |
4790 | token_buffer_size = orig_token_size; | |
4791 | ||
5e13499c CR |
4792 | parser_state &= ~PST_COMPASSIGN; |
4793 | ||
7117c2d2 JA |
4794 | if (wl == &parse_string_error) |
4795 | { | |
4796 | last_command_exit_value = EXECUTION_FAILURE; | |
4797 | last_read_token = '\n'; /* XXX */ | |
4798 | if (interactive_shell == 0 && posixly_correct) | |
4799 | jump_to_top_level (FORCE_EOF); | |
4800 | else | |
4801 | jump_to_top_level (DISCARD); | |
4802 | } | |
4803 | ||
5e4a95c7 | 4804 | last_read_token = orig_last_token; /* XXX - was WORD? */ |
dc8fbaf9 | 4805 | |
7117c2d2 JA |
4806 | if (wl) |
4807 | { | |
4808 | rl = REVERSE_LIST (wl, WORD_LIST *); | |
4809 | ret = string_list (rl); | |
4810 | dispose_words (rl); | |
4811 | } | |
4812 | else | |
4813 | ret = (char *)NULL; | |
4814 | ||
4815 | if (retlenp) | |
4816 | *retlenp = (ret && *ret) ? strlen (ret) : 0; | |
5e4a95c7 CR |
4817 | |
4818 | if (assignok) | |
4819 | parser_state |= PST_ASSIGNOK; | |
4820 | ||
7117c2d2 JA |
4821 | return ret; |
4822 | } | |
4823 | ||
d3a24ed2 CR |
4824 | /************************************************ |
4825 | * * | |
4826 | * SAVING AND RESTORING PARTIAL PARSE STATE * | |
4827 | * * | |
4828 | ************************************************/ | |
4829 | ||
4830 | sh_parser_state_t * | |
4831 | save_parser_state (ps) | |
4832 | sh_parser_state_t *ps; | |
4833 | { | |
4834 | #if defined (ARRAY_VARS) | |
4835 | SHELL_VAR *v; | |
4836 | #endif | |
4837 | ||
4838 | if (ps == 0) | |
9607141c | 4839 | ps = (sh_parser_state_t *)xmalloc (sizeof (sh_parser_state_t)); |
d3a24ed2 CR |
4840 | if (ps == 0) |
4841 | return ((sh_parser_state_t *)NULL); | |
4842 | ||
4843 | ps->parser_state = parser_state; | |
4844 | ps->token_state = save_token_state (); | |
4845 | ||
4846 | ps->input_line_terminator = shell_input_line_terminator; | |
4847 | ps->eof_encountered = eof_encountered; | |
4848 | ||
4849 | ps->current_command_line_count = current_command_line_count; | |
4850 | ||
4851 | #if defined (HISTORY) | |
4852 | ps->remember_on_history = remember_on_history; | |
4853 | # if defined (BANG_HISTORY) | |
4854 | ps->history_expansion_inhibited = history_expansion_inhibited; | |
4855 | # endif | |
4856 | #endif | |
4857 | ||
4858 | ps->last_command_exit_value = last_command_exit_value; | |
4859 | #if defined (ARRAY_VARS) | |
4860 | v = find_variable ("PIPESTATUS"); | |
4861 | if (v && array_p (v) && array_cell (v)) | |
4862 | ps->pipestatus = array_copy (array_cell (v)); | |
4863 | else | |
4864 | ps->pipestatus = (ARRAY *)NULL; | |
4865 | #endif | |
4866 | ||
4867 | ps->last_shell_builtin = last_shell_builtin; | |
4868 | ps->this_shell_builtin = this_shell_builtin; | |
4869 | ||
4870 | ps->expand_aliases = expand_aliases; | |
4871 | ps->echo_input_at_read = echo_input_at_read; | |
4872 | ||
4873 | return (ps); | |
4874 | } | |
4875 | ||
4876 | void | |
4877 | restore_parser_state (ps) | |
4878 | sh_parser_state_t *ps; | |
4879 | { | |
4880 | #if defined (ARRAY_VARS) | |
4881 | SHELL_VAR *v; | |
4882 | #endif | |
4883 | ||
4884 | if (ps == 0) | |
4885 | return; | |
4886 | ||
4887 | parser_state = ps->parser_state; | |
4888 | if (ps->token_state) | |
4889 | { | |
4890 | restore_token_state (ps->token_state); | |
4891 | free (ps->token_state); | |
4892 | } | |
4893 | ||
4894 | shell_input_line_terminator = ps->input_line_terminator; | |
4895 | eof_encountered = ps->eof_encountered; | |
4896 | ||
4897 | current_command_line_count = ps->current_command_line_count; | |
4898 | ||
4899 | #if defined (HISTORY) | |
4900 | remember_on_history = ps->remember_on_history; | |
4901 | # if defined (BANG_HISTORY) | |
4902 | history_expansion_inhibited = ps->history_expansion_inhibited; | |
4903 | # endif | |
4904 | #endif | |
4905 | ||
4906 | last_command_exit_value = ps->last_command_exit_value; | |
4907 | #if defined (ARRAY_VARS) | |
4908 | v = find_variable ("PIPESTATUS"); | |
4909 | if (v && array_p (v) && array_cell (v)) | |
4910 | { | |
4911 | array_dispose (array_cell (v)); | |
4912 | var_setarray (v, ps->pipestatus); | |
4913 | } | |
4914 | #endif | |
4915 | ||
4916 | last_shell_builtin = ps->last_shell_builtin; | |
4917 | this_shell_builtin = ps->this_shell_builtin; | |
4918 | ||
4919 | expand_aliases = ps->expand_aliases; | |
4920 | echo_input_at_read = ps->echo_input_at_read; | |
4921 | } | |
4922 | ||
7117c2d2 JA |
4923 | /************************************************ |
4924 | * * | |
4925 | * MULTIBYTE CHARACTER HANDLING * | |
4926 | * * | |
4927 | ************************************************/ | |
4928 | ||
4929 | #if defined (HANDLE_MULTIBYTE) | |
4930 | static void | |
4931 | set_line_mbstate () | |
4932 | { | |
d3a24ed2 | 4933 | int i, previ, len, c; |
7117c2d2 JA |
4934 | mbstate_t mbs, prevs; |
4935 | size_t mbclen; | |
4936 | ||
4937 | if (shell_input_line == NULL) | |
4938 | return; | |
4939 | len = strlen (shell_input_line); /* XXX - shell_input_line_len ? */ | |
4940 | FREE (shell_input_line_property); | |
4941 | shell_input_line_property = (char *)xmalloc (len + 1); | |
4942 | ||
4943 | memset (&prevs, '\0', sizeof (mbstate_t)); | |
4944 | for (i = previ = 0; i < len; i++) | |
4945 | { | |
4946 | mbs = prevs; | |
4947 | ||
d3a24ed2 CR |
4948 | c = shell_input_line[i]; |
4949 | if (c == EOF) | |
7117c2d2 JA |
4950 | { |
4951 | int j; | |
4952 | for (j = i; j < len; j++) | |
4953 | shell_input_line_property[j] = 1; | |
4954 | break; | |
4955 | } | |
4956 | ||
4957 | mbclen = mbrlen (shell_input_line + previ, i - previ + 1, &mbs); | |
4958 | if (mbclen == 1 || mbclen == (size_t)-1) | |
4959 | { | |
4960 | mbclen = 1; | |
4961 | previ = i + 1; | |
4962 | } | |
4963 | else if (mbclen == (size_t)-2) | |
4964 | mbclen = 0; | |
4965 | else if (mbclen > 1) | |
4966 | { | |
4967 | mbclen = 0; | |
4968 | previ = i + 1; | |
4969 | prevs = mbs; | |
4970 | } | |
4971 | else | |
4972 | { | |
d3a24ed2 CR |
4973 | /* XXX - what to do if mbrlen returns 0? (null wide character) */ |
4974 | int j; | |
4975 | for (j = i; j < len; j++) | |
4976 | shell_input_line_property[j] = 1; | |
4977 | break; | |
7117c2d2 JA |
4978 | } |
4979 | ||
4980 | shell_input_line_property[i] = mbclen; | |
4981 | } | |
4982 | } | |
4983 | #endif /* HANDLE_MULTIBYTE */ |