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Commit | Line | Data |
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726f6388 JA |
1 | /* Yacc grammar for bash. */ |
2 | ||
8943768b | 3 | /* Copyright (C) 1989-2008 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)); | |
ed35cb4a | 151 | static void rewind_input_string __P((void)); |
f73dda09 JA |
152 | static int yy_stream_get __P((void)); |
153 | static int yy_stream_unget __P((int)); | |
154 | ||
155 | static int shell_getc __P((int)); | |
156 | static void shell_ungetc __P((int)); | |
157 | static void discard_until __P((int)); | |
158 | ||
159 | #if defined (ALIAS) || defined (DPAREN_ARITHMETIC) | |
160 | static void push_string __P((char *, int, alias_t *)); | |
161 | static void pop_string __P((void)); | |
162 | static void free_string_list __P((void)); | |
163 | #endif | |
164 | ||
165 | static char *read_a_line __P((int)); | |
166 | ||
f73dda09 JA |
167 | static int reserved_word_acceptable __P((int)); |
168 | static int yylex __P((void)); | |
169 | static int alias_expand_token __P((char *)); | |
170 | static int time_command_acceptable __P((void)); | |
171 | static int special_case_tokens __P((char *)); | |
172 | static int read_token __P((int)); | |
173 | static char *parse_matched_pair __P((int, int, int, int *, int)); | |
ed35cb4a | 174 | static char *parse_comsub __P((int, int, int, int *, int)); |
7117c2d2 JA |
175 | #if defined (ARRAY_VARS) |
176 | static char *parse_compound_assignment __P((int *)); | |
177 | #endif | |
f73dda09 | 178 | #if defined (DPAREN_ARITHMETIC) || defined (ARITH_FOR_COMMAND) |
7117c2d2 | 179 | static int parse_dparen __P((int)); |
d3a24ed2 | 180 | static int parse_arith_cmd __P((char **, int)); |
f73dda09 | 181 | #endif |
cce855bc | 182 | #if defined (COND_COMMAND) |
7117c2d2 | 183 | static void cond_error __P((void)); |
f73dda09 JA |
184 | static COND_COM *cond_expr __P((void)); |
185 | static COND_COM *cond_or __P((void)); | |
186 | static COND_COM *cond_and __P((void)); | |
187 | static COND_COM *cond_term __P((void)); | |
188 | static int cond_skip_newlines __P((void)); | |
189 | static COMMAND *parse_cond_command __P((void)); | |
cce855bc | 190 | #endif |
7117c2d2 JA |
191 | #if defined (ARRAY_VARS) |
192 | static int token_is_assignment __P((char *, int)); | |
193 | static int token_is_ident __P((char *, int)); | |
194 | #endif | |
f73dda09 JA |
195 | static int read_token_word __P((int)); |
196 | static void discard_parser_constructs __P((int)); | |
726f6388 | 197 | |
7117c2d2 JA |
198 | static char *error_token_from_token __P((int)); |
199 | static char *error_token_from_text __P((void)); | |
200 | static void print_offending_line __P((void)); | |
f73dda09 | 201 | static void report_syntax_error __P((char *)); |
7117c2d2 | 202 | |
f73dda09 JA |
203 | static void handle_eof_input_unit __P((void)); |
204 | static void prompt_again __P((void)); | |
d166f048 | 205 | #if 0 |
f73dda09 | 206 | static void reset_readline_prompt __P((void)); |
d166f048 | 207 | #endif |
f73dda09 | 208 | static void print_prompt __P((void)); |
726f6388 | 209 | |
7117c2d2 JA |
210 | #if defined (HANDLE_MULTIBYTE) |
211 | static void set_line_mbstate __P((void)); | |
212 | static char *shell_input_line_property = NULL; | |
213 | #else | |
214 | # define set_line_mbstate() | |
215 | #endif | |
216 | ||
f73dda09 | 217 | extern int yyerror __P((const char *)); |
d166f048 | 218 | |
7117c2d2 JA |
219 | #ifdef DEBUG |
220 | extern int yydebug; | |
221 | #endif | |
222 | ||
ccc6cda3 JA |
223 | /* Default prompt strings */ |
224 | char *primary_prompt = PPROMPT; | |
225 | char *secondary_prompt = SPROMPT; | |
226 | ||
726f6388 JA |
227 | /* PROMPT_STRING_POINTER points to one of these, never to an actual string. */ |
228 | char *ps1_prompt, *ps2_prompt; | |
229 | ||
230 | /* Handle on the current prompt string. Indirectly points through | |
231 | ps1_ or ps2_prompt. */ | |
232 | char **prompt_string_pointer = (char **)NULL; | |
233 | char *current_prompt_string; | |
234 | ||
ccc6cda3 JA |
235 | /* Non-zero means we expand aliases in commands. */ |
236 | int expand_aliases = 0; | |
237 | ||
238 | /* If non-zero, the decoded prompt string undergoes parameter and | |
239 | variable substitution, command substitution, arithmetic substitution, | |
240 | string expansion, process substitution, and quote removal in | |
241 | decode_prompt_string. */ | |
242 | int promptvars = 1; | |
243 | ||
d3a24ed2 CR |
244 | /* If non-zero, $'...' and $"..." are expanded when they appear within |
245 | a ${...} expansion, even when the expansion appears within double | |
246 | quotes. */ | |
247 | int extended_quote = 1; | |
248 | ||
726f6388 JA |
249 | /* The decoded prompt string. Used if READLINE is not defined or if |
250 | editing is turned off. Analogous to current_readline_prompt. */ | |
251 | static char *current_decoded_prompt; | |
252 | ||
253 | /* The number of lines read from input while creating the current command. */ | |
ccc6cda3 | 254 | int current_command_line_count; |
726f6388 | 255 | |
8943768b CR |
256 | /* The token that currently denotes the end of parse. */ |
257 | int shell_eof_token; | |
258 | ||
259 | /* The token currently being read. */ | |
260 | int current_token; | |
261 | ||
726f6388 JA |
262 | /* Variables to manage the task of reading here documents, because we need to |
263 | defer the reading until after a complete command has been collected. */ | |
264 | static REDIRECT *redir_stack[10]; | |
ccc6cda3 | 265 | int need_here_doc; |
726f6388 JA |
266 | |
267 | /* Where shell input comes from. History expansion is performed on each | |
268 | line when the shell is interactive. */ | |
269 | static char *shell_input_line = (char *)NULL; | |
ccc6cda3 JA |
270 | static int shell_input_line_index; |
271 | static int shell_input_line_size; /* Amount allocated for shell_input_line. */ | |
272 | static int shell_input_line_len; /* strlen (shell_input_line) */ | |
726f6388 JA |
273 | |
274 | /* Either zero or EOF. */ | |
ccc6cda3 JA |
275 | static int shell_input_line_terminator; |
276 | ||
277 | /* The line number in a script on which a function definition starts. */ | |
278 | static int function_dstart; | |
279 | ||
280 | /* The line number in a script on which a function body starts. */ | |
281 | static int function_bstart; | |
726f6388 | 282 | |
bb70624e JA |
283 | /* The line number in a script at which an arithmetic for command starts. */ |
284 | static int arith_for_lineno; | |
285 | ||
8943768b CR |
286 | /* The current parser state. */ |
287 | static int parser_state; | |
288 | ||
289 | /* The last read token, or NULL. read_token () uses this for context | |
290 | checking. */ | |
291 | static int last_read_token; | |
292 | ||
293 | /* The token read prior to last_read_token. */ | |
294 | static int token_before_that; | |
295 | ||
296 | /* The token read prior to token_before_that. */ | |
297 | static int two_tokens_ago; | |
298 | ||
d3a24ed2 CR |
299 | /* The line number in a script where the word in a `case WORD', `select WORD' |
300 | or `for WORD' begins. This is a nested command maximum, since the array | |
301 | index is decremented after a case, select, or for command is parsed. */ | |
302 | #define MAX_CASE_NEST 128 | |
303 | static int word_lineno[MAX_CASE_NEST]; | |
304 | static int word_top = -1; | |
305 | ||
5e13499c CR |
306 | /* If non-zero, it is the token that we want read_token to return |
307 | regardless of what text is (or isn't) present to be read. This | |
308 | is reset by read_token. If token_to_read == WORD or | |
309 | ASSIGNMENT_WORD, yylval.word should be set to word_desc_to_read. */ | |
310 | static int token_to_read; | |
311 | static WORD_DESC *word_desc_to_read; | |
312 | ||
726f6388 JA |
313 | static REDIRECTEE redir; |
314 | %} | |
315 | ||
316 | %union { | |
317 | WORD_DESC *word; /* the word that we read. */ | |
318 | int number; /* the number that we read. */ | |
319 | WORD_LIST *word_list; | |
320 | COMMAND *command; | |
321 | REDIRECT *redirect; | |
322 | ELEMENT element; | |
323 | PATTERN_LIST *pattern; | |
324 | } | |
325 | ||
326 | /* Reserved words. Members of the first group are only recognized | |
327 | in the case that they are preceded by a list_terminator. Members | |
cce855bc JA |
328 | of the second group are for [[...]] commands. Members of the |
329 | third group are recognized only under special circumstances. */ | |
726f6388 | 330 | %token IF THEN ELSE ELIF FI CASE ESAC FOR SELECT WHILE UNTIL DO DONE FUNCTION |
cce855bc | 331 | %token COND_START COND_END COND_ERROR |
bb70624e | 332 | %token IN BANG TIME TIMEOPT |
726f6388 JA |
333 | |
334 | /* More general tokens. yylex () knows how to make these. */ | |
335 | %token <word> WORD ASSIGNMENT_WORD | |
336 | %token <number> NUMBER | |
bb70624e | 337 | %token <word_list> ARITH_CMD ARITH_FOR_EXPRS |
cce855bc | 338 | %token <command> COND_CMD |
7117c2d2 | 339 | %token AND_AND OR_OR GREATER_GREATER LESS_LESS LESS_AND LESS_LESS_LESS |
8943768b CR |
340 | %token GREATER_AND SEMI_SEMI SEMI_AND SEMI_SEMI_AND |
341 | %token LESS_LESS_MINUS AND_GREATER AND_GREATER_GREATER LESS_GREATER | |
342 | %token GREATER_BAR BAR_AND | |
726f6388 JA |
343 | |
344 | /* The types that the various syntactical units return. */ | |
345 | ||
ccc6cda3 JA |
346 | %type <command> inputunit command pipeline pipeline_command |
347 | %type <command> list list0 list1 compound_list simple_list simple_list1 | |
348 | %type <command> simple_command shell_command | |
349 | %type <command> for_command select_command case_command group_command | |
cce855bc JA |
350 | %type <command> arith_command |
351 | %type <command> cond_command | |
bb70624e | 352 | %type <command> arith_for_command |
28ef6c31 | 353 | %type <command> function_def function_body if_command elif_clause subshell |
ccc6cda3 | 354 | %type <redirect> redirection redirection_list |
726f6388 | 355 | %type <element> simple_command_element |
ccc6cda3 JA |
356 | %type <word_list> word_list pattern |
357 | %type <pattern> pattern_list case_clause_sequence case_clause | |
358 | %type <number> timespec | |
5e13499c | 359 | %type <number> list_terminator |
726f6388 JA |
360 | |
361 | %start inputunit | |
362 | ||
363 | %left '&' ';' '\n' yacc_EOF | |
364 | %left AND_AND OR_OR | |
8943768b | 365 | %right '|' BAR_AND |
726f6388 JA |
366 | %% |
367 | ||
7117c2d2 | 368 | inputunit: simple_list simple_list_terminator |
726f6388 JA |
369 | { |
370 | /* Case of regular command. Discard the error | |
371 | safety net,and return the command just parsed. */ | |
372 | global_command = $1; | |
373 | eof_encountered = 0; | |
7117c2d2 | 374 | /* discard_parser_constructs (0); */ |
726f6388 JA |
375 | YYACCEPT; |
376 | } | |
377 | | '\n' | |
378 | { | |
379 | /* Case of regular command, but not a very | |
380 | interesting one. Return a NULL command. */ | |
381 | global_command = (COMMAND *)NULL; | |
382 | YYACCEPT; | |
383 | } | |
ccc6cda3 | 384 | | error '\n' |
726f6388 JA |
385 | { |
386 | /* Error during parsing. Return NULL command. */ | |
387 | global_command = (COMMAND *)NULL; | |
388 | eof_encountered = 0; | |
7117c2d2 | 389 | /* discard_parser_constructs (1); */ |
726f6388 JA |
390 | if (interactive) |
391 | { | |
392 | YYACCEPT; | |
393 | } | |
394 | else | |
395 | { | |
396 | YYABORT; | |
397 | } | |
398 | } | |
399 | | yacc_EOF | |
400 | { | |
ccc6cda3 | 401 | /* Case of EOF seen by itself. Do ignoreeof or |
726f6388 JA |
402 | not. */ |
403 | global_command = (COMMAND *)NULL; | |
404 | handle_eof_input_unit (); | |
405 | YYACCEPT; | |
406 | } | |
407 | ; | |
408 | ||
ccc6cda3 JA |
409 | word_list: WORD |
410 | { $$ = make_word_list ($1, (WORD_LIST *)NULL); } | |
411 | | word_list WORD | |
726f6388 JA |
412 | { $$ = make_word_list ($2, $1); } |
413 | ; | |
414 | ||
415 | redirection: '>' WORD | |
416 | { | |
417 | redir.filename = $2; | |
418 | $$ = make_redirection (1, r_output_direction, redir); | |
419 | } | |
420 | | '<' WORD | |
421 | { | |
422 | redir.filename = $2; | |
423 | $$ = make_redirection (0, r_input_direction, redir); | |
424 | } | |
425 | | NUMBER '>' WORD | |
426 | { | |
427 | redir.filename = $3; | |
428 | $$ = make_redirection ($1, r_output_direction, redir); | |
429 | } | |
430 | | NUMBER '<' WORD | |
431 | { | |
432 | redir.filename = $3; | |
433 | $$ = make_redirection ($1, r_input_direction, redir); | |
434 | } | |
435 | | GREATER_GREATER WORD | |
436 | { | |
437 | redir.filename = $2; | |
438 | $$ = make_redirection (1, r_appending_to, redir); | |
439 | } | |
440 | | NUMBER GREATER_GREATER WORD | |
441 | { | |
442 | redir.filename = $3; | |
443 | $$ = make_redirection ($1, r_appending_to, redir); | |
444 | } | |
445 | | LESS_LESS WORD | |
446 | { | |
447 | redir.filename = $2; | |
448 | $$ = make_redirection (0, r_reading_until, redir); | |
449 | redir_stack[need_here_doc++] = $$; | |
450 | } | |
451 | | NUMBER LESS_LESS WORD | |
452 | { | |
453 | redir.filename = $3; | |
454 | $$ = make_redirection ($1, r_reading_until, redir); | |
455 | redir_stack[need_here_doc++] = $$; | |
456 | } | |
7117c2d2 JA |
457 | | LESS_LESS_LESS WORD |
458 | { | |
459 | redir.filename = $2; | |
460 | $$ = make_redirection (0, r_reading_string, redir); | |
461 | } | |
462 | | NUMBER LESS_LESS_LESS WORD | |
463 | { | |
464 | redir.filename = $3; | |
465 | $$ = make_redirection ($1, r_reading_string, redir); | |
466 | } | |
726f6388 JA |
467 | | LESS_AND NUMBER |
468 | { | |
469 | redir.dest = $2; | |
470 | $$ = make_redirection (0, r_duplicating_input, redir); | |
471 | } | |
472 | | NUMBER LESS_AND NUMBER | |
473 | { | |
474 | redir.dest = $3; | |
475 | $$ = make_redirection ($1, r_duplicating_input, redir); | |
476 | } | |
477 | | GREATER_AND NUMBER | |
478 | { | |
479 | redir.dest = $2; | |
480 | $$ = make_redirection (1, r_duplicating_output, redir); | |
481 | } | |
482 | | NUMBER GREATER_AND NUMBER | |
483 | { | |
484 | redir.dest = $3; | |
485 | $$ = make_redirection ($1, r_duplicating_output, redir); | |
486 | } | |
487 | | LESS_AND WORD | |
488 | { | |
489 | redir.filename = $2; | |
490 | $$ = make_redirection (0, r_duplicating_input_word, redir); | |
491 | } | |
492 | | NUMBER LESS_AND WORD | |
493 | { | |
494 | redir.filename = $3; | |
495 | $$ = make_redirection ($1, r_duplicating_input_word, redir); | |
496 | } | |
497 | | GREATER_AND WORD | |
498 | { | |
499 | redir.filename = $2; | |
500 | $$ = make_redirection (1, r_duplicating_output_word, redir); | |
501 | } | |
502 | | NUMBER GREATER_AND WORD | |
503 | { | |
504 | redir.filename = $3; | |
505 | $$ = make_redirection ($1, r_duplicating_output_word, redir); | |
506 | } | |
507 | | LESS_LESS_MINUS WORD | |
508 | { | |
509 | redir.filename = $2; | |
510 | $$ = make_redirection | |
511 | (0, r_deblank_reading_until, redir); | |
512 | redir_stack[need_here_doc++] = $$; | |
513 | } | |
514 | | NUMBER LESS_LESS_MINUS WORD | |
515 | { | |
516 | redir.filename = $3; | |
517 | $$ = make_redirection | |
518 | ($1, r_deblank_reading_until, redir); | |
519 | redir_stack[need_here_doc++] = $$; | |
520 | } | |
521 | | GREATER_AND '-' | |
522 | { | |
f73dda09 | 523 | redir.dest = 0; |
726f6388 JA |
524 | $$ = make_redirection (1, r_close_this, redir); |
525 | } | |
526 | | NUMBER GREATER_AND '-' | |
527 | { | |
f73dda09 | 528 | redir.dest = 0; |
726f6388 JA |
529 | $$ = make_redirection ($1, r_close_this, redir); |
530 | } | |
531 | | LESS_AND '-' | |
532 | { | |
f73dda09 | 533 | redir.dest = 0; |
726f6388 JA |
534 | $$ = make_redirection (0, r_close_this, redir); |
535 | } | |
536 | | NUMBER LESS_AND '-' | |
537 | { | |
f73dda09 | 538 | redir.dest = 0; |
726f6388 JA |
539 | $$ = make_redirection ($1, r_close_this, redir); |
540 | } | |
541 | | AND_GREATER WORD | |
542 | { | |
543 | redir.filename = $2; | |
544 | $$ = make_redirection (1, r_err_and_out, redir); | |
545 | } | |
8943768b CR |
546 | | AND_GREATER_GREATER WORD |
547 | { | |
548 | redir.filename = $2; | |
549 | $$ = make_redirection (1, r_append_err_and_out, redir); | |
550 | } | |
726f6388 JA |
551 | | NUMBER LESS_GREATER WORD |
552 | { | |
553 | redir.filename = $3; | |
554 | $$ = make_redirection ($1, r_input_output, redir); | |
555 | } | |
556 | | LESS_GREATER WORD | |
557 | { | |
726f6388 | 558 | redir.filename = $2; |
ccc6cda3 JA |
559 | $$ = make_redirection (0, r_input_output, redir); |
560 | } | |
726f6388 JA |
561 | | GREATER_BAR WORD |
562 | { | |
563 | redir.filename = $2; | |
564 | $$ = make_redirection (1, r_output_force, redir); | |
565 | } | |
566 | | NUMBER GREATER_BAR WORD | |
567 | { | |
568 | redir.filename = $3; | |
569 | $$ = make_redirection ($1, r_output_force, redir); | |
570 | } | |
571 | ; | |
572 | ||
573 | simple_command_element: WORD | |
574 | { $$.word = $1; $$.redirect = 0; } | |
575 | | ASSIGNMENT_WORD | |
576 | { $$.word = $1; $$.redirect = 0; } | |
577 | | redirection | |
578 | { $$.redirect = $1; $$.word = 0; } | |
579 | ; | |
580 | ||
ccc6cda3 | 581 | redirection_list: redirection |
726f6388 JA |
582 | { |
583 | $$ = $1; | |
584 | } | |
ccc6cda3 JA |
585 | | redirection_list redirection |
586 | { | |
587 | register REDIRECT *t; | |
726f6388 | 588 | |
ccc6cda3 JA |
589 | for (t = $1; t->next; t = t->next) |
590 | ; | |
591 | t->next = $2; | |
726f6388 JA |
592 | $$ = $1; |
593 | } | |
594 | ; | |
595 | ||
596 | simple_command: simple_command_element | |
597 | { $$ = make_simple_command ($1, (COMMAND *)NULL); } | |
598 | | simple_command simple_command_element | |
599 | { $$ = make_simple_command ($2, $1); } | |
600 | ; | |
601 | ||
602 | command: simple_command | |
603 | { $$ = clean_simple_command ($1); } | |
604 | | shell_command | |
605 | { $$ = $1; } | |
ccc6cda3 | 606 | | shell_command redirection_list |
726f6388 | 607 | { |
ccc6cda3 JA |
608 | COMMAND *tc; |
609 | ||
610 | tc = $1; | |
ccc6cda3 | 611 | if (tc->redirects) |
726f6388 JA |
612 | { |
613 | register REDIRECT *t; | |
ccc6cda3 | 614 | for (t = tc->redirects; t->next; t = t->next) |
726f6388 JA |
615 | ; |
616 | t->next = $2; | |
617 | } | |
618 | else | |
ccc6cda3 | 619 | tc->redirects = $2; |
726f6388 JA |
620 | $$ = $1; |
621 | } | |
28ef6c31 JA |
622 | | function_def |
623 | { $$ = $1; } | |
726f6388 JA |
624 | ; |
625 | ||
ccc6cda3 JA |
626 | shell_command: for_command |
627 | { $$ = $1; } | |
628 | | case_command | |
629 | { $$ = $1; } | |
630 | | WHILE compound_list DO compound_list DONE | |
726f6388 | 631 | { $$ = make_while_command ($2, $4); } |
ccc6cda3 | 632 | | UNTIL compound_list DO compound_list DONE |
726f6388 JA |
633 | { $$ = make_until_command ($2, $4); } |
634 | | select_command | |
635 | { $$ = $1; } | |
636 | | if_command | |
637 | { $$ = $1; } | |
638 | | subshell | |
639 | { $$ = $1; } | |
640 | | group_command | |
641 | { $$ = $1; } | |
cce855bc JA |
642 | | arith_command |
643 | { $$ = $1; } | |
644 | | cond_command | |
645 | { $$ = $1; } | |
bb70624e JA |
646 | | arith_for_command |
647 | { $$ = $1; } | |
726f6388 JA |
648 | ; |
649 | ||
d166f048 | 650 | for_command: FOR WORD newline_list DO compound_list DONE |
d3a24ed2 CR |
651 | { |
652 | $$ = make_for_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $5, word_lineno[word_top]); | |
653 | if (word_top > 0) word_top--; | |
654 | } | |
d166f048 | 655 | | FOR WORD newline_list '{' compound_list '}' |
d3a24ed2 CR |
656 | { |
657 | $$ = make_for_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $5, word_lineno[word_top]); | |
658 | if (word_top > 0) word_top--; | |
659 | } | |
d166f048 | 660 | | FOR WORD ';' newline_list DO compound_list DONE |
d3a24ed2 CR |
661 | { |
662 | $$ = make_for_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $6, word_lineno[word_top]); | |
663 | if (word_top > 0) word_top--; | |
664 | } | |
d166f048 | 665 | | FOR WORD ';' newline_list '{' compound_list '}' |
d3a24ed2 CR |
666 | { |
667 | $$ = make_for_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $6, word_lineno[word_top]); | |
668 | if (word_top > 0) word_top--; | |
669 | } | |
d166f048 | 670 | | FOR WORD newline_list IN word_list list_terminator newline_list DO compound_list DONE |
d3a24ed2 CR |
671 | { |
672 | $$ = make_for_command ($2, REVERSE_LIST ($5, WORD_LIST *), $9, word_lineno[word_top]); | |
673 | if (word_top > 0) word_top--; | |
674 | } | |
d166f048 | 675 | | FOR WORD newline_list IN word_list list_terminator newline_list '{' compound_list '}' |
d3a24ed2 CR |
676 | { |
677 | $$ = make_for_command ($2, REVERSE_LIST ($5, WORD_LIST *), $9, word_lineno[word_top]); | |
678 | if (word_top > 0) word_top--; | |
679 | } | |
f73dda09 | 680 | | FOR WORD newline_list IN list_terminator newline_list DO compound_list DONE |
d3a24ed2 CR |
681 | { |
682 | $$ = make_for_command ($2, (WORD_LIST *)NULL, $8, word_lineno[word_top]); | |
683 | if (word_top > 0) word_top--; | |
684 | } | |
f73dda09 | 685 | | FOR WORD newline_list IN list_terminator newline_list '{' compound_list '}' |
d3a24ed2 CR |
686 | { |
687 | $$ = make_for_command ($2, (WORD_LIST *)NULL, $8, word_lineno[word_top]); | |
688 | if (word_top > 0) word_top--; | |
689 | } | |
ccc6cda3 JA |
690 | ; |
691 | ||
bb70624e | 692 | arith_for_command: FOR ARITH_FOR_EXPRS list_terminator newline_list DO compound_list DONE |
d3a24ed2 CR |
693 | { |
694 | $$ = make_arith_for_command ($2, $6, arith_for_lineno); | |
695 | if (word_top > 0) word_top--; | |
696 | } | |
bb70624e | 697 | | FOR ARITH_FOR_EXPRS list_terminator newline_list '{' compound_list '}' |
d3a24ed2 CR |
698 | { |
699 | $$ = make_arith_for_command ($2, $6, arith_for_lineno); | |
700 | if (word_top > 0) word_top--; | |
701 | } | |
28ef6c31 | 702 | | FOR ARITH_FOR_EXPRS DO compound_list DONE |
d3a24ed2 CR |
703 | { |
704 | $$ = make_arith_for_command ($2, $4, arith_for_lineno); | |
705 | if (word_top > 0) word_top--; | |
706 | } | |
28ef6c31 | 707 | | FOR ARITH_FOR_EXPRS '{' compound_list '}' |
d3a24ed2 CR |
708 | { |
709 | $$ = make_arith_for_command ($2, $4, arith_for_lineno); | |
710 | if (word_top > 0) word_top--; | |
711 | } | |
bb70624e | 712 | ; |
28ef6c31 | 713 | |
ccc6cda3 | 714 | select_command: SELECT WORD newline_list DO list DONE |
726f6388 | 715 | { |
d3a24ed2 CR |
716 | $$ = make_select_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $5, word_lineno[word_top]); |
717 | if (word_top > 0) word_top--; | |
726f6388 | 718 | } |
ccc6cda3 | 719 | | SELECT WORD newline_list '{' list '}' |
726f6388 | 720 | { |
d3a24ed2 CR |
721 | $$ = make_select_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $5, word_lineno[word_top]); |
722 | if (word_top > 0) word_top--; | |
726f6388 | 723 | } |
ccc6cda3 | 724 | | SELECT WORD ';' newline_list DO list DONE |
726f6388 | 725 | { |
d3a24ed2 CR |
726 | $$ = make_select_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $6, word_lineno[word_top]); |
727 | if (word_top > 0) word_top--; | |
726f6388 | 728 | } |
ccc6cda3 | 729 | | SELECT WORD ';' newline_list '{' list '}' |
726f6388 | 730 | { |
d3a24ed2 CR |
731 | $$ = make_select_command ($2, add_string_to_list ("\"$@\"", (WORD_LIST *)NULL), $6, word_lineno[word_top]); |
732 | if (word_top > 0) word_top--; | |
726f6388 | 733 | } |
ccc6cda3 | 734 | | SELECT WORD newline_list IN word_list list_terminator newline_list DO list DONE |
726f6388 | 735 | { |
d3a24ed2 CR |
736 | $$ = make_select_command ($2, REVERSE_LIST ($5, WORD_LIST *), $9, word_lineno[word_top]); |
737 | if (word_top > 0) word_top--; | |
726f6388 | 738 | } |
ccc6cda3 | 739 | | SELECT WORD newline_list IN word_list list_terminator newline_list '{' list '}' |
726f6388 | 740 | { |
d3a24ed2 CR |
741 | $$ = make_select_command ($2, REVERSE_LIST ($5, WORD_LIST *), $9, word_lineno[word_top]); |
742 | if (word_top > 0) word_top--; | |
726f6388 JA |
743 | } |
744 | ; | |
745 | ||
ccc6cda3 | 746 | case_command: CASE WORD newline_list IN newline_list ESAC |
d3a24ed2 CR |
747 | { |
748 | $$ = make_case_command ($2, (PATTERN_LIST *)NULL, word_lineno[word_top]); | |
749 | if (word_top > 0) word_top--; | |
750 | } | |
ccc6cda3 | 751 | | CASE WORD newline_list IN case_clause_sequence newline_list ESAC |
d3a24ed2 CR |
752 | { |
753 | $$ = make_case_command ($2, $5, word_lineno[word_top]); | |
754 | if (word_top > 0) word_top--; | |
755 | } | |
ccc6cda3 | 756 | | CASE WORD newline_list IN case_clause ESAC |
d3a24ed2 CR |
757 | { |
758 | $$ = make_case_command ($2, $5, word_lineno[word_top]); | |
759 | if (word_top > 0) word_top--; | |
760 | } | |
ccc6cda3 | 761 | ; |
726f6388 | 762 | |
28ef6c31 | 763 | function_def: WORD '(' ')' newline_list function_body |
ccc6cda3 | 764 | { $$ = make_function_def ($1, $5, function_dstart, function_bstart); } |
726f6388 | 765 | |
28ef6c31 | 766 | | FUNCTION WORD '(' ')' newline_list function_body |
ccc6cda3 | 767 | { $$ = make_function_def ($2, $6, function_dstart, function_bstart); } |
726f6388 | 768 | |
28ef6c31 | 769 | | FUNCTION WORD newline_list function_body |
ccc6cda3 | 770 | { $$ = make_function_def ($2, $4, function_dstart, function_bstart); } |
726f6388 JA |
771 | ; |
772 | ||
28ef6c31 JA |
773 | |
774 | function_body: shell_command | |
775 | { $$ = $1; } | |
776 | | shell_command redirection_list | |
777 | { | |
778 | COMMAND *tc; | |
779 | ||
780 | tc = $1; | |
781 | /* According to Posix.2 3.9.5, redirections | |
782 | specified after the body of a function should | |
783 | be attached to the function and performed when | |
784 | the function is executed, not as part of the | |
785 | function definition command. */ | |
786 | /* XXX - I don't think it matters, but we might | |
787 | want to change this in the future to avoid | |
788 | problems differentiating between a function | |
789 | definition with a redirection and a function | |
790 | definition containing a single command with a | |
791 | redirection. The two are semantically equivalent, | |
792 | though -- the only difference is in how the | |
793 | command printing code displays the redirections. */ | |
794 | if (tc->redirects) | |
795 | { | |
796 | register REDIRECT *t; | |
797 | for (t = tc->redirects; t->next; t = t->next) | |
798 | ; | |
799 | t->next = $2; | |
800 | } | |
801 | else | |
802 | tc->redirects = $2; | |
803 | $$ = $1; | |
804 | } | |
805 | ; | |
806 | ||
ccc6cda3 | 807 | subshell: '(' compound_list ')' |
bb70624e JA |
808 | { |
809 | $$ = make_subshell_command ($2); | |
810 | $$->flags |= CMD_WANT_SUBSHELL; | |
811 | } | |
726f6388 | 812 | ; |
ccc6cda3 JA |
813 | |
814 | if_command: IF compound_list THEN compound_list FI | |
726f6388 | 815 | { $$ = make_if_command ($2, $4, (COMMAND *)NULL); } |
ccc6cda3 | 816 | | IF compound_list THEN compound_list ELSE compound_list FI |
726f6388 | 817 | { $$ = make_if_command ($2, $4, $6); } |
ccc6cda3 | 818 | | IF compound_list THEN compound_list elif_clause FI |
726f6388 JA |
819 | { $$ = make_if_command ($2, $4, $5); } |
820 | ; | |
821 | ||
822 | ||
28ef6c31 | 823 | group_command: '{' compound_list '}' |
726f6388 JA |
824 | { $$ = make_group_command ($2); } |
825 | ; | |
826 | ||
cce855bc JA |
827 | arith_command: ARITH_CMD |
828 | { $$ = make_arith_command ($1); } | |
829 | ; | |
830 | ||
831 | cond_command: COND_START COND_CMD COND_END | |
832 | { $$ = $2; } | |
833 | ; | |
834 | ||
ccc6cda3 | 835 | elif_clause: ELIF compound_list THEN compound_list |
726f6388 | 836 | { $$ = make_if_command ($2, $4, (COMMAND *)NULL); } |
ccc6cda3 | 837 | | ELIF compound_list THEN compound_list ELSE compound_list |
726f6388 | 838 | { $$ = make_if_command ($2, $4, $6); } |
ccc6cda3 | 839 | | ELIF compound_list THEN compound_list elif_clause |
726f6388 JA |
840 | { $$ = make_if_command ($2, $4, $5); } |
841 | ; | |
842 | ||
ccc6cda3 JA |
843 | case_clause: pattern_list |
844 | | case_clause_sequence pattern_list | |
726f6388 JA |
845 | { $2->next = $1; $$ = $2; } |
846 | ; | |
847 | ||
ccc6cda3 | 848 | pattern_list: newline_list pattern ')' compound_list |
726f6388 | 849 | { $$ = make_pattern_list ($2, $4); } |
ccc6cda3 | 850 | | newline_list pattern ')' newline_list |
726f6388 | 851 | { $$ = make_pattern_list ($2, (COMMAND *)NULL); } |
ccc6cda3 | 852 | | newline_list '(' pattern ')' compound_list |
726f6388 | 853 | { $$ = make_pattern_list ($3, $5); } |
ccc6cda3 | 854 | | newline_list '(' pattern ')' newline_list |
726f6388 JA |
855 | { $$ = make_pattern_list ($3, (COMMAND *)NULL); } |
856 | ; | |
857 | ||
ccc6cda3 | 858 | case_clause_sequence: pattern_list SEMI_SEMI |
8943768b | 859 | { $$ = $1; } |
ccc6cda3 | 860 | | case_clause_sequence pattern_list SEMI_SEMI |
726f6388 | 861 | { $2->next = $1; $$ = $2; } |
8943768b CR |
862 | | pattern_list SEMI_AND |
863 | { $1->flags |= CASEPAT_FALLTHROUGH; $$ = $1; } | |
864 | | case_clause_sequence pattern_list SEMI_AND | |
865 | { $2->flags |= CASEPAT_FALLTHROUGH; $2->next = $1; $$ = $2; } | |
866 | | pattern_list SEMI_SEMI_AND | |
867 | { $1->flags |= CASEPAT_TESTNEXT; $$ = $1; } | |
868 | | case_clause_sequence pattern_list SEMI_SEMI_AND | |
869 | { $2->flags |= CASEPAT_TESTNEXT; $2->next = $1; $$ = $2; } | |
726f6388 JA |
870 | ; |
871 | ||
726f6388 JA |
872 | pattern: WORD |
873 | { $$ = make_word_list ($1, (WORD_LIST *)NULL); } | |
874 | | pattern '|' WORD | |
875 | { $$ = make_word_list ($3, $1); } | |
876 | ; | |
877 | ||
878 | /* A list allows leading or trailing newlines and | |
879 | newlines as operators (equivalent to semicolons). | |
880 | It must end with a newline or semicolon. | |
881 | Lists are used within commands such as if, for, while. */ | |
882 | ||
ccc6cda3 | 883 | list: newline_list list0 |
726f6388 JA |
884 | { |
885 | $$ = $2; | |
886 | if (need_here_doc) | |
887 | gather_here_documents (); | |
888 | } | |
889 | ; | |
890 | ||
ccc6cda3 JA |
891 | compound_list: list |
892 | | newline_list list1 | |
893 | { | |
894 | $$ = $2; | |
895 | } | |
896 | ; | |
897 | ||
898 | list0: list1 '\n' newline_list | |
899 | | list1 '&' newline_list | |
726f6388 JA |
900 | { |
901 | if ($1->type == cm_connection) | |
902 | $$ = connect_async_list ($1, (COMMAND *)NULL, '&'); | |
903 | else | |
904 | $$ = command_connect ($1, (COMMAND *)NULL, '&'); | |
905 | } | |
ccc6cda3 | 906 | | list1 ';' newline_list |
726f6388 JA |
907 | |
908 | ; | |
909 | ||
ccc6cda3 | 910 | list1: list1 AND_AND newline_list list1 |
726f6388 | 911 | { $$ = command_connect ($1, $4, AND_AND); } |
ccc6cda3 | 912 | | list1 OR_OR newline_list list1 |
726f6388 | 913 | { $$ = command_connect ($1, $4, OR_OR); } |
ccc6cda3 | 914 | | list1 '&' newline_list list1 |
726f6388 JA |
915 | { |
916 | if ($1->type == cm_connection) | |
917 | $$ = connect_async_list ($1, $4, '&'); | |
918 | else | |
919 | $$ = command_connect ($1, $4, '&'); | |
920 | } | |
ccc6cda3 | 921 | | list1 ';' newline_list list1 |
726f6388 | 922 | { $$ = command_connect ($1, $4, ';'); } |
ccc6cda3 | 923 | | list1 '\n' newline_list list1 |
726f6388 | 924 | { $$ = command_connect ($1, $4, ';'); } |
ccc6cda3 | 925 | | pipeline_command |
726f6388 | 926 | { $$ = $1; } |
726f6388 JA |
927 | ; |
928 | ||
7117c2d2 JA |
929 | simple_list_terminator: '\n' |
930 | | yacc_EOF | |
931 | ; | |
932 | ||
726f6388 | 933 | list_terminator:'\n' |
5e13499c | 934 | { $$ = '\n'; } |
726f6388 | 935 | | ';' |
5e13499c | 936 | { $$ = ';'; } |
726f6388 | 937 | | yacc_EOF |
5e13499c | 938 | { $$ = yacc_EOF; } |
726f6388 JA |
939 | ; |
940 | ||
ccc6cda3 JA |
941 | newline_list: |
942 | | newline_list '\n' | |
726f6388 JA |
943 | ; |
944 | ||
945 | /* A simple_list is a list that contains no significant newlines | |
946 | and no leading or trailing newlines. Newlines are allowed | |
947 | only following operators, where they are not significant. | |
948 | ||
949 | This is what an inputunit consists of. */ | |
950 | ||
951 | simple_list: simple_list1 | |
952 | { | |
953 | $$ = $1; | |
954 | if (need_here_doc) | |
955 | gather_here_documents (); | |
956 | } | |
957 | | simple_list1 '&' | |
958 | { | |
959 | if ($1->type == cm_connection) | |
960 | $$ = connect_async_list ($1, (COMMAND *)NULL, '&'); | |
961 | else | |
962 | $$ = command_connect ($1, (COMMAND *)NULL, '&'); | |
963 | if (need_here_doc) | |
964 | gather_here_documents (); | |
965 | } | |
966 | | simple_list1 ';' | |
967 | { | |
968 | $$ = $1; | |
969 | if (need_here_doc) | |
970 | gather_here_documents (); | |
971 | } | |
972 | ; | |
973 | ||
ccc6cda3 | 974 | simple_list1: simple_list1 AND_AND newline_list simple_list1 |
726f6388 | 975 | { $$ = command_connect ($1, $4, AND_AND); } |
ccc6cda3 | 976 | | simple_list1 OR_OR newline_list simple_list1 |
726f6388 JA |
977 | { $$ = command_connect ($1, $4, OR_OR); } |
978 | | simple_list1 '&' simple_list1 | |
979 | { | |
980 | if ($1->type == cm_connection) | |
981 | $$ = connect_async_list ($1, $3, '&'); | |
982 | else | |
983 | $$ = command_connect ($1, $3, '&'); | |
984 | } | |
985 | | simple_list1 ';' simple_list1 | |
986 | { $$ = command_connect ($1, $3, ';'); } | |
ccc6cda3 JA |
987 | |
988 | | pipeline_command | |
989 | { $$ = $1; } | |
990 | ; | |
991 | ||
992 | pipeline_command: pipeline | |
726f6388 JA |
993 | { $$ = $1; } |
994 | | BANG pipeline | |
995 | { | |
453f278a CR |
996 | if ($2) |
997 | $2->flags |= CMD_INVERT_RETURN; | |
726f6388 JA |
998 | $$ = $2; |
999 | } | |
ccc6cda3 JA |
1000 | | timespec pipeline |
1001 | { | |
453f278a CR |
1002 | if ($2) |
1003 | $2->flags |= $1; | |
ccc6cda3 JA |
1004 | $$ = $2; |
1005 | } | |
1006 | | timespec BANG pipeline | |
1007 | { | |
453f278a CR |
1008 | if ($3) |
1009 | $3->flags |= $1|CMD_INVERT_RETURN; | |
ccc6cda3 JA |
1010 | $$ = $3; |
1011 | } | |
1012 | | BANG timespec pipeline | |
1013 | { | |
453f278a CR |
1014 | if ($3) |
1015 | $3->flags |= $2|CMD_INVERT_RETURN; | |
ccc6cda3 JA |
1016 | $$ = $3; |
1017 | } | |
5e13499c CR |
1018 | | timespec list_terminator |
1019 | { | |
1020 | ELEMENT x; | |
1021 | ||
1022 | /* Boy, this is unclean. `time' by itself can | |
1023 | time a null command. We cheat and push a | |
1024 | newline back if the list_terminator was a newline | |
1025 | to avoid the double-newline problem (one to | |
1026 | terminate this, one to terminate the command) */ | |
1027 | x.word = 0; | |
1028 | x.redirect = 0; | |
1029 | $$ = make_simple_command (x, (COMMAND *)NULL); | |
1030 | $$->flags |= $1; | |
1031 | /* XXX - let's cheat and push a newline back */ | |
1032 | if ($2 == '\n') | |
1033 | token_to_read = '\n'; | |
1034 | } | |
1035 | ||
726f6388 JA |
1036 | ; |
1037 | ||
8943768b | 1038 | pipeline: pipeline '|' newline_list pipeline |
726f6388 | 1039 | { $$ = command_connect ($1, $4, '|'); } |
8943768b CR |
1040 | | pipeline BAR_AND newline_list pipeline |
1041 | { | |
1042 | /* Make cmd1 |& cmd2 equivalent to cmd1 2>&1 | cmd2 */ | |
1043 | COMMAND *tc; | |
1044 | REDIRECTEE rd; | |
1045 | REDIRECT *r; | |
1046 | ||
1047 | tc = $1; | |
1048 | rd.dest = 1; | |
1049 | r = make_redirection (2, r_duplicating_output, rd); | |
1050 | if (tc->redirects) | |
1051 | { | |
1052 | register REDIRECT *t; | |
1053 | for (t = tc->redirects; t->next; t = t->next) | |
1054 | ; | |
1055 | t->next = r; | |
1056 | } | |
1057 | else | |
1058 | tc->redirects = r; | |
1059 | ||
1060 | $$ = command_connect ($1, $4, '|'); | |
1061 | } | |
726f6388 JA |
1062 | | command |
1063 | { $$ = $1; } | |
1064 | ; | |
ccc6cda3 JA |
1065 | |
1066 | timespec: TIME | |
1067 | { $$ = CMD_TIME_PIPELINE; } | |
1068 | | TIME TIMEOPT | |
1069 | { $$ = CMD_TIME_PIPELINE|CMD_TIME_POSIX; } | |
1070 | ; | |
726f6388 JA |
1071 | %% |
1072 | ||
1073 | /* Initial size to allocate for tokens, and the | |
1074 | amount to grow them by. */ | |
d166f048 | 1075 | #define TOKEN_DEFAULT_INITIAL_SIZE 496 |
726f6388 JA |
1076 | #define TOKEN_DEFAULT_GROW_SIZE 512 |
1077 | ||
d3a24ed2 CR |
1078 | /* Should we call prompt_again? */ |
1079 | #define SHOULD_PROMPT() \ | |
1080 | (interactive && (bash_input.type == st_stdin || bash_input.type == st_stream)) | |
1081 | ||
1082 | #if defined (ALIAS) | |
1083 | # define expanding_alias() (pushed_string_list && pushed_string_list->expander) | |
1084 | #else | |
1085 | # define expanding_alias() 0 | |
1086 | #endif | |
1087 | ||
726f6388 JA |
1088 | /* Global var is non-zero when end of file has been reached. */ |
1089 | int EOF_Reached = 0; | |
1090 | ||
f73dda09 JA |
1091 | #ifdef DEBUG |
1092 | static void | |
ccc6cda3 JA |
1093 | debug_parser (i) |
1094 | int i; | |
1095 | { | |
1096 | #if YYDEBUG != 0 | |
1097 | yydebug = i; | |
1098 | #endif | |
1099 | } | |
f73dda09 | 1100 | #endif |
ccc6cda3 | 1101 | |
726f6388 JA |
1102 | /* yy_getc () returns the next available character from input or EOF. |
1103 | yy_ungetc (c) makes `c' the next character to read. | |
1104 | init_yy_io (get, unget, type, location) makes the function GET the | |
1105 | installed function for getting the next character, makes UNGET the | |
1106 | installed function for un-getting a character, sets the type of stream | |
1107 | (either string or file) from TYPE, and makes LOCATION point to where | |
1108 | the input is coming from. */ | |
1109 | ||
1110 | /* Unconditionally returns end-of-file. */ | |
ccc6cda3 | 1111 | int |
726f6388 JA |
1112 | return_EOF () |
1113 | { | |
1114 | return (EOF); | |
1115 | } | |
1116 | ||
1117 | /* Variable containing the current get and unget functions. | |
1118 | See ./input.h for a clearer description. */ | |
1119 | BASH_INPUT bash_input; | |
1120 | ||
ccc6cda3 JA |
1121 | /* Set all of the fields in BASH_INPUT to NULL. Free bash_input.name if it |
1122 | is non-null, avoiding a memory leak. */ | |
726f6388 JA |
1123 | void |
1124 | initialize_bash_input () | |
1125 | { | |
ccc6cda3 JA |
1126 | bash_input.type = st_none; |
1127 | FREE (bash_input.name); | |
726f6388 JA |
1128 | bash_input.name = (char *)NULL; |
1129 | bash_input.location.file = (FILE *)NULL; | |
1130 | bash_input.location.string = (char *)NULL; | |
f73dda09 JA |
1131 | bash_input.getter = (sh_cget_func_t *)NULL; |
1132 | bash_input.ungetter = (sh_cunget_func_t *)NULL; | |
726f6388 JA |
1133 | } |
1134 | ||
1135 | /* Set the contents of the current bash input stream from | |
1136 | GET, UNGET, TYPE, NAME, and LOCATION. */ | |
1137 | void | |
1138 | init_yy_io (get, unget, type, name, location) | |
f73dda09 JA |
1139 | sh_cget_func_t *get; |
1140 | sh_cunget_func_t *unget; | |
d166f048 | 1141 | enum stream_type type; |
f73dda09 | 1142 | const char *name; |
726f6388 JA |
1143 | INPUT_STREAM location; |
1144 | { | |
1145 | bash_input.type = type; | |
1146 | FREE (bash_input.name); | |
ccc6cda3 | 1147 | bash_input.name = name ? savestring (name) : (char *)NULL; |
726f6388 | 1148 | |
ccc6cda3 | 1149 | /* XXX */ |
726f6388 JA |
1150 | #if defined (CRAY) |
1151 | memcpy((char *)&bash_input.location.string, (char *)&location.string, sizeof(location)); | |
1152 | #else | |
1153 | bash_input.location = location; | |
1154 | #endif | |
1155 | bash_input.getter = get; | |
1156 | bash_input.ungetter = unget; | |
1157 | } | |
1158 | ||
7117c2d2 JA |
1159 | char * |
1160 | yy_input_name () | |
1161 | { | |
1162 | return (bash_input.name ? bash_input.name : "stdin"); | |
1163 | } | |
1164 | ||
726f6388 | 1165 | /* Call this to get the next character of input. */ |
f73dda09 | 1166 | static int |
726f6388 JA |
1167 | yy_getc () |
1168 | { | |
1169 | return (*(bash_input.getter)) (); | |
1170 | } | |
1171 | ||
1172 | /* Call this to unget C. That is, to make C the next character | |
1173 | to be read. */ | |
f73dda09 | 1174 | static int |
726f6388 JA |
1175 | yy_ungetc (c) |
1176 | int c; | |
1177 | { | |
1178 | return (*(bash_input.ungetter)) (c); | |
1179 | } | |
1180 | ||
1181 | #if defined (BUFFERED_INPUT) | |
f73dda09 | 1182 | #ifdef INCLUDE_UNUSED |
726f6388 JA |
1183 | int |
1184 | input_file_descriptor () | |
1185 | { | |
1186 | switch (bash_input.type) | |
1187 | { | |
1188 | case st_stream: | |
1189 | return (fileno (bash_input.location.file)); | |
1190 | case st_bstream: | |
1191 | return (bash_input.location.buffered_fd); | |
ccc6cda3 | 1192 | case st_stdin: |
726f6388 JA |
1193 | default: |
1194 | return (fileno (stdin)); | |
1195 | } | |
1196 | } | |
f73dda09 | 1197 | #endif |
726f6388 JA |
1198 | #endif /* BUFFERED_INPUT */ |
1199 | ||
1200 | /* **************************************************************** */ | |
1201 | /* */ | |
1202 | /* Let input be read from readline (). */ | |
1203 | /* */ | |
1204 | /* **************************************************************** */ | |
1205 | ||
1206 | #if defined (READLINE) | |
1207 | char *current_readline_prompt = (char *)NULL; | |
1208 | char *current_readline_line = (char *)NULL; | |
1209 | int current_readline_line_index = 0; | |
1210 | ||
1211 | static int | |
1212 | yy_readline_get () | |
1213 | { | |
ccc6cda3 | 1214 | SigHandler *old_sigint; |
f73dda09 JA |
1215 | int line_len; |
1216 | unsigned char c; | |
ccc6cda3 | 1217 | |
726f6388 JA |
1218 | if (!current_readline_line) |
1219 | { | |
726f6388 JA |
1220 | if (!bash_readline_initialized) |
1221 | initialize_readline (); | |
1222 | ||
1223 | #if defined (JOB_CONTROL) | |
1224 | if (job_control) | |
28ef6c31 | 1225 | give_terminal_to (shell_pgrp, 0); |
726f6388 JA |
1226 | #endif /* JOB_CONTROL */ |
1227 | ||
f73dda09 | 1228 | old_sigint = (SigHandler *)NULL; |
726f6388 JA |
1229 | if (signal_is_ignored (SIGINT) == 0) |
1230 | { | |
1231 | old_sigint = (SigHandler *)set_signal_handler (SIGINT, sigint_sighandler); | |
1232 | interrupt_immediately++; | |
1233 | } | |
ac18b312 | 1234 | terminate_immediately = 1; |
726f6388 | 1235 | |
ccc6cda3 JA |
1236 | current_readline_line = readline (current_readline_prompt ? |
1237 | current_readline_prompt : ""); | |
726f6388 | 1238 | |
ac18b312 | 1239 | terminate_immediately = 0; |
f73dda09 | 1240 | if (signal_is_ignored (SIGINT) == 0 && old_sigint) |
726f6388 JA |
1241 | { |
1242 | interrupt_immediately--; | |
1243 | set_signal_handler (SIGINT, old_sigint); | |
1244 | } | |
1245 | ||
ccc6cda3 JA |
1246 | #if 0 |
1247 | /* Reset the prompt to the decoded value of prompt_string_pointer. */ | |
726f6388 | 1248 | reset_readline_prompt (); |
ccc6cda3 | 1249 | #endif |
726f6388 | 1250 | |
ccc6cda3 | 1251 | if (current_readline_line == 0) |
726f6388 JA |
1252 | return (EOF); |
1253 | ||
ccc6cda3 | 1254 | current_readline_line_index = 0; |
726f6388 | 1255 | line_len = strlen (current_readline_line); |
ccc6cda3 | 1256 | |
f73dda09 | 1257 | current_readline_line = (char *)xrealloc (current_readline_line, 2 + line_len); |
726f6388 JA |
1258 | current_readline_line[line_len++] = '\n'; |
1259 | current_readline_line[line_len] = '\0'; | |
1260 | } | |
1261 | ||
ccc6cda3 | 1262 | if (current_readline_line[current_readline_line_index] == 0) |
726f6388 JA |
1263 | { |
1264 | free (current_readline_line); | |
1265 | current_readline_line = (char *)NULL; | |
1266 | return (yy_readline_get ()); | |
1267 | } | |
1268 | else | |
1269 | { | |
f73dda09 | 1270 | c = current_readline_line[current_readline_line_index++]; |
726f6388 JA |
1271 | return (c); |
1272 | } | |
1273 | } | |
1274 | ||
1275 | static int | |
1276 | yy_readline_unget (c) | |
ccc6cda3 | 1277 | int c; |
726f6388 JA |
1278 | { |
1279 | if (current_readline_line_index && current_readline_line) | |
1280 | current_readline_line[--current_readline_line_index] = c; | |
1281 | return (c); | |
1282 | } | |
1283 | ||
ccc6cda3 | 1284 | void |
726f6388 JA |
1285 | with_input_from_stdin () |
1286 | { | |
1287 | INPUT_STREAM location; | |
1288 | ||
1289 | if (bash_input.type != st_stdin && stream_on_stack (st_stdin) == 0) | |
1290 | { | |
1291 | location.string = current_readline_line; | |
1292 | init_yy_io (yy_readline_get, yy_readline_unget, | |
1293 | st_stdin, "readline stdin", location); | |
1294 | } | |
1295 | } | |
1296 | ||
1297 | #else /* !READLINE */ | |
1298 | ||
1299 | void | |
1300 | with_input_from_stdin () | |
1301 | { | |
1302 | with_input_from_stream (stdin, "stdin"); | |
1303 | } | |
1304 | #endif /* !READLINE */ | |
1305 | ||
1306 | /* **************************************************************** */ | |
1307 | /* */ | |
1308 | /* Let input come from STRING. STRING is zero terminated. */ | |
1309 | /* */ | |
1310 | /* **************************************************************** */ | |
1311 | ||
1312 | static int | |
1313 | yy_string_get () | |
1314 | { | |
ccc6cda3 | 1315 | register char *string; |
f73dda09 | 1316 | register unsigned char c; |
726f6388 JA |
1317 | |
1318 | string = bash_input.location.string; | |
726f6388 JA |
1319 | |
1320 | /* If the string doesn't exist, or is empty, EOF found. */ | |
1321 | if (string && *string) | |
1322 | { | |
f73dda09 | 1323 | c = *string++; |
726f6388 | 1324 | bash_input.location.string = string; |
f73dda09 | 1325 | return (c); |
726f6388 | 1326 | } |
f73dda09 JA |
1327 | else |
1328 | return (EOF); | |
726f6388 JA |
1329 | } |
1330 | ||
1331 | static int | |
1332 | yy_string_unget (c) | |
1333 | int c; | |
1334 | { | |
1335 | *(--bash_input.location.string) = c; | |
1336 | return (c); | |
1337 | } | |
1338 | ||
1339 | void | |
1340 | with_input_from_string (string, name) | |
f73dda09 JA |
1341 | char *string; |
1342 | const char *name; | |
726f6388 JA |
1343 | { |
1344 | INPUT_STREAM location; | |
1345 | ||
1346 | location.string = string; | |
726f6388 JA |
1347 | init_yy_io (yy_string_get, yy_string_unget, st_string, name, location); |
1348 | } | |
1349 | ||
ed35cb4a CR |
1350 | /* Count the number of characters we've consumed from bash_input.location.string |
1351 | and read into shell_input_line, but have not returned from shell_getc. | |
1352 | That is the true input location. Rewind bash_input.location.string by | |
1353 | that number of characters, so it points to the last character actually | |
1354 | consumed by the parser. */ | |
1355 | void | |
1356 | rewind_input_string () | |
1357 | { | |
1358 | int xchars; | |
1359 | ||
1360 | /* number of unconsumed characters in the input -- XXX need to take newlines | |
1361 | into account, e.g., $(...\n) */ | |
1362 | xchars = shell_input_line_len - shell_input_line_index; | |
1363 | ||
1364 | /* XXX - how to reflect bash_input.location.string back to string passed to | |
1365 | parse_and_execute or xparse_dolparen? xparse_dolparen needs to know how | |
1366 | far into the string we parsed. parse_and_execute knows where bash_input. | |
1367 | location.string is, and how far from orig_string that is -- that's the | |
1368 | number of characters the command consumed. */ | |
1369 | ||
1370 | /* bash_input.location.string - xchars should be where we parsed to */ | |
1371 | /* need to do more validation on xchars value for sanity -- test cases. */ | |
1372 | bash_input.location.string -= xchars; | |
1373 | } | |
1374 | ||
726f6388 JA |
1375 | /* **************************************************************** */ |
1376 | /* */ | |
1377 | /* Let input come from STREAM. */ | |
1378 | /* */ | |
1379 | /* **************************************************************** */ | |
1380 | ||
bb70624e JA |
1381 | /* These two functions used to test the value of the HAVE_RESTARTABLE_SYSCALLS |
1382 | define, and just use getc/ungetc if it was defined, but since bash | |
1383 | installs its signal handlers without the SA_RESTART flag, some signals | |
1384 | (like SIGCHLD, SIGWINCH, etc.) received during a read(2) will not cause | |
1385 | the read to be restarted. We need to restart it ourselves. */ | |
1386 | ||
726f6388 JA |
1387 | static int |
1388 | yy_stream_get () | |
1389 | { | |
bb70624e | 1390 | int result; |
726f6388 | 1391 | |
bb70624e | 1392 | result = EOF; |
726f6388 | 1393 | if (bash_input.location.file) |
01ed5ba4 CR |
1394 | { |
1395 | if (interactive) | |
ac18b312 CR |
1396 | { |
1397 | interrupt_immediately++; | |
1398 | terminate_immediately++; | |
1399 | } | |
01ed5ba4 CR |
1400 | result = getc_with_restart (bash_input.location.file); |
1401 | if (interactive) | |
ac18b312 CR |
1402 | { |
1403 | interrupt_immediately--; | |
1404 | terminate_immediately--; | |
1405 | } | |
01ed5ba4 | 1406 | } |
726f6388 JA |
1407 | return (result); |
1408 | } | |
1409 | ||
1410 | static int | |
1411 | yy_stream_unget (c) | |
1412 | int c; | |
1413 | { | |
726f6388 | 1414 | return (ungetc_with_restart (c, bash_input.location.file)); |
726f6388 JA |
1415 | } |
1416 | ||
1417 | void | |
1418 | with_input_from_stream (stream, name) | |
1419 | FILE *stream; | |
f73dda09 | 1420 | const char *name; |
726f6388 JA |
1421 | { |
1422 | INPUT_STREAM location; | |
1423 | ||
1424 | location.file = stream; | |
1425 | init_yy_io (yy_stream_get, yy_stream_unget, st_stream, name, location); | |
1426 | } | |
1427 | ||
1428 | typedef struct stream_saver { | |
1429 | struct stream_saver *next; | |
1430 | BASH_INPUT bash_input; | |
1431 | int line; | |
1432 | #if defined (BUFFERED_INPUT) | |
1433 | BUFFERED_STREAM *bstream; | |
1434 | #endif /* BUFFERED_INPUT */ | |
1435 | } STREAM_SAVER; | |
1436 | ||
1437 | /* The globally known line number. */ | |
1438 | int line_number = 0; | |
1439 | ||
cce855bc JA |
1440 | #if defined (COND_COMMAND) |
1441 | static int cond_lineno; | |
1442 | static int cond_token; | |
1443 | #endif | |
1444 | ||
726f6388 JA |
1445 | STREAM_SAVER *stream_list = (STREAM_SAVER *)NULL; |
1446 | ||
ccc6cda3 JA |
1447 | void |
1448 | push_stream (reset_lineno) | |
1449 | int reset_lineno; | |
726f6388 JA |
1450 | { |
1451 | STREAM_SAVER *saver = (STREAM_SAVER *)xmalloc (sizeof (STREAM_SAVER)); | |
1452 | ||
1453 | xbcopy ((char *)&bash_input, (char *)&(saver->bash_input), sizeof (BASH_INPUT)); | |
1454 | ||
1455 | #if defined (BUFFERED_INPUT) | |
1456 | saver->bstream = (BUFFERED_STREAM *)NULL; | |
1457 | /* If we have a buffered stream, clear out buffers[fd]. */ | |
1458 | if (bash_input.type == st_bstream && bash_input.location.buffered_fd >= 0) | |
cce855bc JA |
1459 | saver->bstream = set_buffered_stream (bash_input.location.buffered_fd, |
1460 | (BUFFERED_STREAM *)NULL); | |
726f6388 JA |
1461 | #endif /* BUFFERED_INPUT */ |
1462 | ||
1463 | saver->line = line_number; | |
1464 | bash_input.name = (char *)NULL; | |
1465 | saver->next = stream_list; | |
1466 | stream_list = saver; | |
ccc6cda3 JA |
1467 | EOF_Reached = 0; |
1468 | if (reset_lineno) | |
1469 | line_number = 0; | |
726f6388 JA |
1470 | } |
1471 | ||
ccc6cda3 | 1472 | void |
726f6388 JA |
1473 | pop_stream () |
1474 | { | |
726f6388 JA |
1475 | if (!stream_list) |
1476 | EOF_Reached = 1; | |
1477 | else | |
1478 | { | |
1479 | STREAM_SAVER *saver = stream_list; | |
1480 | ||
1481 | EOF_Reached = 0; | |
1482 | stream_list = stream_list->next; | |
1483 | ||
1484 | init_yy_io (saver->bash_input.getter, | |
1485 | saver->bash_input.ungetter, | |
1486 | saver->bash_input.type, | |
1487 | saver->bash_input.name, | |
1488 | saver->bash_input.location); | |
1489 | ||
1490 | #if defined (BUFFERED_INPUT) | |
1491 | /* If we have a buffered stream, restore buffers[fd]. */ | |
1492 | /* If the input file descriptor was changed while this was on the | |
1493 | save stack, update the buffered fd to the new file descriptor and | |
1494 | re-establish the buffer <-> bash_input fd correspondence. */ | |
1495 | if (bash_input.type == st_bstream && bash_input.location.buffered_fd >= 0) | |
28ef6c31 JA |
1496 | { |
1497 | if (bash_input_fd_changed) | |
726f6388 JA |
1498 | { |
1499 | bash_input_fd_changed = 0; | |
1500 | if (default_buffered_input >= 0) | |
1501 | { | |
1502 | bash_input.location.buffered_fd = default_buffered_input; | |
1503 | saver->bstream->b_fd = default_buffered_input; | |
28ef6c31 | 1504 | SET_CLOSE_ON_EXEC (default_buffered_input); |
726f6388 JA |
1505 | } |
1506 | } | |
28ef6c31 | 1507 | /* XXX could free buffered stream returned as result here. */ |
cce855bc | 1508 | set_buffered_stream (bash_input.location.buffered_fd, saver->bstream); |
28ef6c31 | 1509 | } |
726f6388 JA |
1510 | #endif /* BUFFERED_INPUT */ |
1511 | ||
1512 | line_number = saver->line; | |
1513 | ||
1514 | FREE (saver->bash_input.name); | |
1515 | free (saver); | |
1516 | } | |
1517 | } | |
1518 | ||
1519 | /* Return 1 if a stream of type TYPE is saved on the stack. */ | |
1520 | int | |
1521 | stream_on_stack (type) | |
ccc6cda3 | 1522 | enum stream_type type; |
726f6388 JA |
1523 | { |
1524 | register STREAM_SAVER *s; | |
ccc6cda3 | 1525 | |
726f6388 JA |
1526 | for (s = stream_list; s; s = s->next) |
1527 | if (s->bash_input.type == type) | |
1528 | return 1; | |
1529 | return 0; | |
1530 | } | |
1531 | ||
bb70624e JA |
1532 | /* Save the current token state and return it in a malloced array. */ |
1533 | int * | |
1534 | save_token_state () | |
1535 | { | |
1536 | int *ret; | |
1537 | ||
1538 | ret = (int *)xmalloc (3 * sizeof (int)); | |
1539 | ret[0] = last_read_token; | |
1540 | ret[1] = token_before_that; | |
1541 | ret[2] = two_tokens_ago; | |
1542 | return ret; | |
1543 | } | |
1544 | ||
1545 | void | |
1546 | restore_token_state (ts) | |
1547 | int *ts; | |
1548 | { | |
1549 | if (ts == 0) | |
1550 | return; | |
1551 | last_read_token = ts[0]; | |
1552 | token_before_that = ts[1]; | |
1553 | two_tokens_ago = ts[2]; | |
1554 | } | |
1555 | ||
726f6388 JA |
1556 | /* |
1557 | * This is used to inhibit alias expansion and reserved word recognition | |
ccc6cda3 JA |
1558 | * inside case statement pattern lists. A `case statement pattern list' is: |
1559 | * | |
726f6388 JA |
1560 | * everything between the `in' in a `case word in' and the next ')' |
1561 | * or `esac' | |
1562 | * everything between a `;;' and the next `)' or `esac' | |
1563 | */ | |
726f6388 | 1564 | |
cce855bc JA |
1565 | #if defined (ALIAS) || defined (DPAREN_ARITHMETIC) |
1566 | ||
ccc6cda3 JA |
1567 | #define END_OF_ALIAS 0 |
1568 | ||
726f6388 JA |
1569 | /* |
1570 | * Pseudo-global variables used in implementing token-wise alias expansion. | |
1571 | */ | |
1572 | ||
726f6388 | 1573 | /* |
ccc6cda3 | 1574 | * Pushing and popping strings. This works together with shell_getc to |
726f6388 JA |
1575 | * implement alias expansion on a per-token basis. |
1576 | */ | |
1577 | ||
1578 | typedef struct string_saver { | |
1579 | struct string_saver *next; | |
1580 | int expand_alias; /* Value to set expand_alias to when string is popped. */ | |
1581 | char *saved_line; | |
cce855bc | 1582 | #if defined (ALIAS) |
ccc6cda3 | 1583 | alias_t *expander; /* alias that caused this line to be pushed. */ |
cce855bc | 1584 | #endif |
726f6388 JA |
1585 | int saved_line_size, saved_line_index, saved_line_terminator; |
1586 | } STRING_SAVER; | |
1587 | ||
1588 | STRING_SAVER *pushed_string_list = (STRING_SAVER *)NULL; | |
1589 | ||
726f6388 JA |
1590 | /* |
1591 | * Push the current shell_input_line onto a stack of such lines and make S | |
1592 | * the current input. Used when expanding aliases. EXPAND is used to set | |
1593 | * the value of expand_next_token when the string is popped, so that the | |
1594 | * word after the alias in the original line is handled correctly when the | |
1595 | * alias expands to multiple words. TOKEN is the token that was expanded | |
1596 | * into S; it is saved and used to prevent infinite recursive expansion. | |
1597 | */ | |
1598 | static void | |
ccc6cda3 | 1599 | push_string (s, expand, ap) |
726f6388 JA |
1600 | char *s; |
1601 | int expand; | |
ccc6cda3 | 1602 | alias_t *ap; |
726f6388 | 1603 | { |
f73dda09 | 1604 | STRING_SAVER *temp = (STRING_SAVER *)xmalloc (sizeof (STRING_SAVER)); |
726f6388 JA |
1605 | |
1606 | temp->expand_alias = expand; | |
1607 | temp->saved_line = shell_input_line; | |
1608 | temp->saved_line_size = shell_input_line_size; | |
1609 | temp->saved_line_index = shell_input_line_index; | |
1610 | temp->saved_line_terminator = shell_input_line_terminator; | |
cce855bc | 1611 | #if defined (ALIAS) |
ccc6cda3 | 1612 | temp->expander = ap; |
cce855bc | 1613 | #endif |
726f6388 JA |
1614 | temp->next = pushed_string_list; |
1615 | pushed_string_list = temp; | |
1616 | ||
cce855bc | 1617 | #if defined (ALIAS) |
d166f048 JA |
1618 | if (ap) |
1619 | ap->flags |= AL_BEINGEXPANDED; | |
cce855bc | 1620 | #endif |
726f6388 JA |
1621 | |
1622 | shell_input_line = s; | |
1623 | shell_input_line_size = strlen (s); | |
1624 | shell_input_line_index = 0; | |
1625 | shell_input_line_terminator = '\0'; | |
d3a24ed2 CR |
1626 | #if 0 |
1627 | parser_state &= ~PST_ALEXPNEXT; /* XXX */ | |
1628 | #endif | |
7117c2d2 JA |
1629 | |
1630 | set_line_mbstate (); | |
726f6388 JA |
1631 | } |
1632 | ||
1633 | /* | |
1634 | * Make the top of the pushed_string stack be the current shell input. | |
1635 | * Only called when there is something on the stack. Called from shell_getc | |
1636 | * when it thinks it has consumed the string generated by an alias expansion | |
1637 | * and needs to return to the original input line. | |
1638 | */ | |
1639 | static void | |
1640 | pop_string () | |
1641 | { | |
1642 | STRING_SAVER *t; | |
1643 | ||
1644 | FREE (shell_input_line); | |
1645 | shell_input_line = pushed_string_list->saved_line; | |
1646 | shell_input_line_index = pushed_string_list->saved_line_index; | |
1647 | shell_input_line_size = pushed_string_list->saved_line_size; | |
1648 | shell_input_line_terminator = pushed_string_list->saved_line_terminator; | |
ccc6cda3 JA |
1649 | |
1650 | if (pushed_string_list->expand_alias) | |
1651 | parser_state |= PST_ALEXPNEXT; | |
1652 | else | |
1653 | parser_state &= ~PST_ALEXPNEXT; | |
726f6388 JA |
1654 | |
1655 | t = pushed_string_list; | |
1656 | pushed_string_list = pushed_string_list->next; | |
ccc6cda3 | 1657 | |
cce855bc | 1658 | #if defined (ALIAS) |
d166f048 JA |
1659 | if (t->expander) |
1660 | t->expander->flags &= ~AL_BEINGEXPANDED; | |
cce855bc | 1661 | #endif |
ccc6cda3 JA |
1662 | |
1663 | free ((char *)t); | |
7117c2d2 JA |
1664 | |
1665 | set_line_mbstate (); | |
726f6388 JA |
1666 | } |
1667 | ||
1668 | static void | |
1669 | free_string_list () | |
1670 | { | |
ccc6cda3 | 1671 | register STRING_SAVER *t, *t1; |
726f6388 | 1672 | |
ccc6cda3 | 1673 | for (t = pushed_string_list; t; ) |
726f6388 JA |
1674 | { |
1675 | t1 = t->next; | |
1676 | FREE (t->saved_line); | |
cce855bc JA |
1677 | #if defined (ALIAS) |
1678 | if (t->expander) | |
1679 | t->expander->flags &= ~AL_BEINGEXPANDED; | |
1680 | #endif | |
726f6388 JA |
1681 | free ((char *)t); |
1682 | t = t1; | |
1683 | } | |
1684 | pushed_string_list = (STRING_SAVER *)NULL; | |
1685 | } | |
1686 | ||
cce855bc | 1687 | #endif /* ALIAS || DPAREN_ARITHMETIC */ |
ccc6cda3 | 1688 | |
d3a24ed2 CR |
1689 | void |
1690 | free_pushed_string_input () | |
1691 | { | |
1692 | #if defined (ALIAS) || defined (DPAREN_ARITHMETIC) | |
1693 | free_string_list (); | |
1694 | #endif | |
1695 | } | |
1696 | ||
726f6388 JA |
1697 | /* Return a line of text, taken from wherever yylex () reads input. |
1698 | If there is no more input, then we return NULL. If REMOVE_QUOTED_NEWLINE | |
1699 | is non-zero, we remove unquoted \<newline> pairs. This is used by | |
1700 | read_secondary_line to read here documents. */ | |
1701 | static char * | |
1702 | read_a_line (remove_quoted_newline) | |
1703 | int remove_quoted_newline; | |
1704 | { | |
1705 | static char *line_buffer = (char *)NULL; | |
1706 | static int buffer_size = 0; | |
1707 | int indx = 0, c, peekc, pass_next; | |
1708 | ||
ccc6cda3 | 1709 | #if defined (READLINE) |
d3a24ed2 | 1710 | if (no_line_editing && SHOULD_PROMPT ()) |
ccc6cda3 | 1711 | #else |
d3a24ed2 | 1712 | if (SHOULD_PROMPT ()) |
ccc6cda3 JA |
1713 | #endif |
1714 | print_prompt (); | |
1715 | ||
726f6388 JA |
1716 | pass_next = 0; |
1717 | while (1) | |
1718 | { | |
726f6388 JA |
1719 | /* Allow immediate exit if interrupted during input. */ |
1720 | QUIT; | |
1721 | ||
01ed5ba4 CR |
1722 | c = yy_getc (); |
1723 | ||
28ef6c31 | 1724 | /* Ignore null bytes in input. */ |
726f6388 | 1725 | if (c == 0) |
28ef6c31 JA |
1726 | { |
1727 | #if 0 | |
1728 | internal_warning ("read_a_line: ignored null byte in input"); | |
1729 | #endif | |
1730 | continue; | |
1731 | } | |
726f6388 JA |
1732 | |
1733 | /* If there is no more input, then we return NULL. */ | |
1734 | if (c == EOF) | |
1735 | { | |
ccc6cda3 JA |
1736 | if (interactive && bash_input.type == st_stream) |
1737 | clearerr (stdin); | |
726f6388 JA |
1738 | if (indx == 0) |
1739 | return ((char *)NULL); | |
1740 | c = '\n'; | |
1741 | } | |
1742 | ||
1743 | /* `+2' in case the final character in the buffer is a newline. */ | |
ccc6cda3 | 1744 | RESIZE_MALLOCED_BUFFER (line_buffer, indx, 2, buffer_size, 128); |
726f6388 JA |
1745 | |
1746 | /* IF REMOVE_QUOTED_NEWLINES is non-zero, we are reading a | |
1747 | here document with an unquoted delimiter. In this case, | |
1748 | the line will be expanded as if it were in double quotes. | |
1749 | We allow a backslash to escape the next character, but we | |
1750 | need to treat the backslash specially only if a backslash | |
1751 | quoting a backslash-newline pair appears in the line. */ | |
1752 | if (pass_next) | |
28ef6c31 | 1753 | { |
726f6388 JA |
1754 | line_buffer[indx++] = c; |
1755 | pass_next = 0; | |
28ef6c31 | 1756 | } |
726f6388 JA |
1757 | else if (c == '\\' && remove_quoted_newline) |
1758 | { | |
1759 | peekc = yy_getc (); | |
1760 | if (peekc == '\n') | |
d3a24ed2 CR |
1761 | { |
1762 | line_number++; | |
1763 | continue; /* Make the unquoted \<newline> pair disappear. */ | |
1764 | } | |
726f6388 JA |
1765 | else |
1766 | { | |
1767 | yy_ungetc (peekc); | |
1768 | pass_next = 1; | |
1769 | line_buffer[indx++] = c; /* Preserve the backslash. */ | |
1770 | } | |
1771 | } | |
1772 | else | |
1773 | line_buffer[indx++] = c; | |
1774 | ||
1775 | if (c == '\n') | |
1776 | { | |
1777 | line_buffer[indx] = '\0'; | |
1778 | return (line_buffer); | |
1779 | } | |
1780 | } | |
1781 | } | |
1782 | ||
1783 | /* Return a line as in read_a_line (), but insure that the prompt is | |
1784 | the secondary prompt. This is used to read the lines of a here | |
1785 | document. REMOVE_QUOTED_NEWLINE is non-zero if we should remove | |
1786 | newlines quoted with backslashes while reading the line. It is | |
1787 | non-zero unless the delimiter of the here document was quoted. */ | |
1788 | char * | |
1789 | read_secondary_line (remove_quoted_newline) | |
1790 | int remove_quoted_newline; | |
1791 | { | |
1792 | prompt_string_pointer = &ps2_prompt; | |
d3a24ed2 CR |
1793 | if (SHOULD_PROMPT()) |
1794 | prompt_again (); | |
726f6388 JA |
1795 | return (read_a_line (remove_quoted_newline)); |
1796 | } | |
1797 | ||
726f6388 JA |
1798 | /* **************************************************************** */ |
1799 | /* */ | |
1800 | /* YYLEX () */ | |
1801 | /* */ | |
1802 | /* **************************************************************** */ | |
1803 | ||
1804 | /* Reserved words. These are only recognized as the first word of a | |
1805 | command. */ | |
1806 | STRING_INT_ALIST word_token_alist[] = { | |
1807 | { "if", IF }, | |
1808 | { "then", THEN }, | |
1809 | { "else", ELSE }, | |
1810 | { "elif", ELIF }, | |
1811 | { "fi", FI }, | |
1812 | { "case", CASE }, | |
1813 | { "esac", ESAC }, | |
1814 | { "for", FOR }, | |
1815 | #if defined (SELECT_COMMAND) | |
1816 | { "select", SELECT }, | |
1817 | #endif | |
1818 | { "while", WHILE }, | |
1819 | { "until", UNTIL }, | |
1820 | { "do", DO }, | |
1821 | { "done", DONE }, | |
1822 | { "in", IN }, | |
1823 | { "function", FUNCTION }, | |
ccc6cda3 JA |
1824 | #if defined (COMMAND_TIMING) |
1825 | { "time", TIME }, | |
1826 | #endif | |
726f6388 JA |
1827 | { "{", '{' }, |
1828 | { "}", '}' }, | |
1829 | { "!", BANG }, | |
cce855bc JA |
1830 | #if defined (COND_COMMAND) |
1831 | { "[[", COND_START }, | |
1832 | { "]]", COND_END }, | |
1833 | #endif | |
726f6388 JA |
1834 | { (char *)NULL, 0} |
1835 | }; | |
1836 | ||
7117c2d2 JA |
1837 | /* other tokens that can be returned by read_token() */ |
1838 | STRING_INT_ALIST other_token_alist[] = { | |
1839 | /* Multiple-character tokens with special values */ | |
1840 | { "-p", TIMEOPT }, | |
1841 | { "&&", AND_AND }, | |
1842 | { "||", OR_OR }, | |
1843 | { ">>", GREATER_GREATER }, | |
1844 | { "<<", LESS_LESS }, | |
1845 | { "<&", LESS_AND }, | |
1846 | { ">&", GREATER_AND }, | |
1847 | { ";;", SEMI_SEMI }, | |
8943768b CR |
1848 | { ";&", SEMI_AND }, |
1849 | { ";;&", SEMI_SEMI_AND }, | |
7117c2d2 JA |
1850 | { "<<-", LESS_LESS_MINUS }, |
1851 | { "<<<", LESS_LESS_LESS }, | |
1852 | { "&>", AND_GREATER }, | |
8943768b | 1853 | { "&>>", AND_GREATER_GREATER }, |
7117c2d2 JA |
1854 | { "<>", LESS_GREATER }, |
1855 | { ">|", GREATER_BAR }, | |
8943768b | 1856 | { "|&", BAR_AND }, |
7117c2d2 JA |
1857 | { "EOF", yacc_EOF }, |
1858 | /* Tokens whose value is the character itself */ | |
1859 | { ">", '>' }, | |
1860 | { "<", '<' }, | |
1861 | { "-", '-' }, | |
1862 | { "{", '{' }, | |
1863 | { "}", '}' }, | |
1864 | { ";", ';' }, | |
1865 | { "(", '(' }, | |
1866 | { ")", ')' }, | |
1867 | { "|", '|' }, | |
1868 | { "&", '&' }, | |
1869 | { "newline", '\n' }, | |
1870 | { (char *)NULL, 0} | |
1871 | }; | |
1872 | ||
1873 | /* others not listed here: | |
1874 | WORD look at yylval.word | |
1875 | ASSIGNMENT_WORD look at yylval.word | |
1876 | NUMBER look at yylval.number | |
1877 | ARITH_CMD look at yylval.word_list | |
1878 | ARITH_FOR_EXPRS look at yylval.word_list | |
1879 | COND_CMD look at yylval.command | |
1880 | */ | |
b72432fd | 1881 | |
ccc6cda3 JA |
1882 | /* These are used by read_token_word, but appear up here so that shell_getc |
1883 | can use them to decide when to add otherwise blank lines to the history. */ | |
1884 | ||
1885 | /* The primary delimiter stack. */ | |
1886 | struct dstack dstack = { (char *)NULL, 0, 0 }; | |
1887 | ||
1888 | /* A temporary delimiter stack to be used when decoding prompt strings. | |
1889 | This is needed because command substitutions in prompt strings (e.g., PS2) | |
1890 | can screw up the parser's quoting state. */ | |
1891 | static struct dstack temp_dstack = { (char *)NULL, 0, 0 }; | |
1892 | ||
1893 | /* Macro for accessing the top delimiter on the stack. Returns the | |
1894 | delimiter or zero if none. */ | |
1895 | #define current_delimiter(ds) \ | |
1896 | (ds.delimiter_depth ? ds.delimiters[ds.delimiter_depth - 1] : 0) | |
1897 | ||
1898 | #define push_delimiter(ds, character) \ | |
1899 | do \ | |
1900 | { \ | |
1901 | if (ds.delimiter_depth + 2 > ds.delimiter_space) \ | |
f73dda09 | 1902 | ds.delimiters = (char *)xrealloc \ |
ccc6cda3 JA |
1903 | (ds.delimiters, (ds.delimiter_space += 10) * sizeof (char)); \ |
1904 | ds.delimiters[ds.delimiter_depth] = character; \ | |
1905 | ds.delimiter_depth++; \ | |
1906 | } \ | |
1907 | while (0) | |
1908 | ||
1909 | #define pop_delimiter(ds) ds.delimiter_depth-- | |
1910 | ||
726f6388 JA |
1911 | /* Return the next shell input character. This always reads characters |
1912 | from shell_input_line; when that line is exhausted, it is time to | |
1913 | read the next line. This is called by read_token when the shell is | |
1914 | processing normal command input. */ | |
ccc6cda3 | 1915 | |
28ef6c31 JA |
1916 | /* This implements one-character lookahead/lookbehind across physical input |
1917 | lines, to avoid something being lost because it's pushed back with | |
1918 | shell_ungetc when we're at the start of a line. */ | |
1919 | static int eol_ungetc_lookahead = 0; | |
1920 | ||
726f6388 JA |
1921 | static int |
1922 | shell_getc (remove_quoted_newline) | |
1923 | int remove_quoted_newline; | |
1924 | { | |
ccc6cda3 | 1925 | register int i; |
726f6388 | 1926 | int c; |
f73dda09 | 1927 | unsigned char uc; |
726f6388 JA |
1928 | |
1929 | QUIT; | |
1930 | ||
7027abcb CR |
1931 | if (sigwinch_received) |
1932 | { | |
1933 | sigwinch_received = 0; | |
ac58e8c8 | 1934 | get_new_window_size (0, (int *)0, (int *)0); |
7027abcb CR |
1935 | } |
1936 | ||
28ef6c31 JA |
1937 | if (eol_ungetc_lookahead) |
1938 | { | |
1939 | c = eol_ungetc_lookahead; | |
1940 | eol_ungetc_lookahead = 0; | |
1941 | return (c); | |
1942 | } | |
1943 | ||
cce855bc | 1944 | #if defined (ALIAS) || defined (DPAREN_ARITHMETIC) |
726f6388 JA |
1945 | /* If shell_input_line[shell_input_line_index] == 0, but there is |
1946 | something on the pushed list of strings, then we don't want to go | |
1947 | off and get another line. We let the code down below handle it. */ | |
1948 | ||
1949 | if (!shell_input_line || ((!shell_input_line[shell_input_line_index]) && | |
1950 | (pushed_string_list == (STRING_SAVER *)NULL))) | |
cce855bc | 1951 | #else /* !ALIAS && !DPAREN_ARITHMETIC */ |
726f6388 | 1952 | if (!shell_input_line || !shell_input_line[shell_input_line_index]) |
cce855bc | 1953 | #endif /* !ALIAS && !DPAREN_ARITHMETIC */ |
726f6388 | 1954 | { |
726f6388 JA |
1955 | line_number++; |
1956 | ||
1957 | restart_read: | |
1958 | ||
1959 | /* Allow immediate exit if interrupted during input. */ | |
1960 | QUIT; | |
1961 | ||
1962 | i = 0; | |
1963 | shell_input_line_terminator = 0; | |
1964 | ||
d3a24ed2 CR |
1965 | /* If the shell is interatctive, but not currently printing a prompt |
1966 | (interactive_shell && interactive == 0), we don't want to print | |
1967 | notifies or cleanup the jobs -- we want to defer it until we do | |
1968 | print the next prompt. */ | |
1969 | if (interactive_shell == 0 || SHOULD_PROMPT()) | |
1970 | { | |
726f6388 JA |
1971 | #if defined (JOB_CONTROL) |
1972 | /* This can cause a problem when reading a command as the result | |
1973 | of a trap, when the trap is called from flush_child. This call | |
1974 | had better not cause jobs to disappear from the job table in | |
1975 | that case, or we will have big trouble. */ | |
d3a24ed2 | 1976 | notify_and_cleanup (); |
726f6388 | 1977 | #else /* !JOB_CONTROL */ |
d3a24ed2 | 1978 | cleanup_dead_jobs (); |
726f6388 | 1979 | #endif /* !JOB_CONTROL */ |
d3a24ed2 | 1980 | } |
726f6388 JA |
1981 | |
1982 | #if defined (READLINE) | |
d3a24ed2 | 1983 | if (no_line_editing && SHOULD_PROMPT()) |
726f6388 | 1984 | #else |
d3a24ed2 | 1985 | if (SHOULD_PROMPT()) |
726f6388 JA |
1986 | #endif |
1987 | print_prompt (); | |
1988 | ||
1989 | if (bash_input.type == st_stream) | |
1990 | clearerr (stdin); | |
1991 | ||
28ef6c31 | 1992 | while (1) |
726f6388 | 1993 | { |
28ef6c31 JA |
1994 | c = yy_getc (); |
1995 | ||
726f6388 JA |
1996 | /* Allow immediate exit if interrupted during input. */ |
1997 | QUIT; | |
1998 | ||
28ef6c31 JA |
1999 | if (c == '\0') |
2000 | { | |
2001 | #if 0 | |
2002 | internal_warning ("shell_getc: ignored null byte in input"); | |
2003 | #endif | |
2004 | continue; | |
2005 | } | |
2006 | ||
ccc6cda3 | 2007 | RESIZE_MALLOCED_BUFFER (shell_input_line, i, 2, shell_input_line_size, 256); |
726f6388 JA |
2008 | |
2009 | if (c == EOF) | |
2010 | { | |
2011 | if (bash_input.type == st_stream) | |
2012 | clearerr (stdin); | |
2013 | ||
ccc6cda3 | 2014 | if (i == 0) |
726f6388 JA |
2015 | shell_input_line_terminator = EOF; |
2016 | ||
2017 | shell_input_line[i] = '\0'; | |
2018 | break; | |
2019 | } | |
2020 | ||
2021 | shell_input_line[i++] = c; | |
2022 | ||
2023 | if (c == '\n') | |
2024 | { | |
2025 | shell_input_line[--i] = '\0'; | |
2026 | current_command_line_count++; | |
2027 | break; | |
2028 | } | |
2029 | } | |
28ef6c31 | 2030 | |
726f6388 JA |
2031 | shell_input_line_index = 0; |
2032 | shell_input_line_len = i; /* == strlen (shell_input_line) */ | |
2033 | ||
7117c2d2 JA |
2034 | set_line_mbstate (); |
2035 | ||
726f6388 | 2036 | #if defined (HISTORY) |
ccc6cda3 | 2037 | if (remember_on_history && shell_input_line && shell_input_line[0]) |
726f6388 JA |
2038 | { |
2039 | char *expansions; | |
ccc6cda3 JA |
2040 | # if defined (BANG_HISTORY) |
2041 | int old_hist; | |
2042 | ||
2043 | /* If the current delimiter is a single quote, we should not be | |
2044 | performing history expansion, even if we're on a different | |
2045 | line from the original single quote. */ | |
2046 | old_hist = history_expansion_inhibited; | |
2047 | if (current_delimiter (dstack) == '\'') | |
2048 | history_expansion_inhibited = 1; | |
2049 | # endif | |
726f6388 | 2050 | expansions = pre_process_line (shell_input_line, 1, 1); |
ccc6cda3 JA |
2051 | # if defined (BANG_HISTORY) |
2052 | history_expansion_inhibited = old_hist; | |
2053 | # endif | |
d166f048 JA |
2054 | if (expansions != shell_input_line) |
2055 | { | |
2056 | free (shell_input_line); | |
2057 | shell_input_line = expansions; | |
2058 | shell_input_line_len = shell_input_line ? | |
2059 | strlen (shell_input_line) : 0; | |
2060 | if (!shell_input_line_len) | |
2061 | current_command_line_count--; | |
2062 | ||
2063 | /* We have to force the xrealloc below because we don't know | |
28ef6c31 | 2064 | the true allocated size of shell_input_line anymore. */ |
d166f048 | 2065 | shell_input_line_size = shell_input_line_len; |
7117c2d2 JA |
2066 | |
2067 | set_line_mbstate (); | |
d166f048 | 2068 | } |
726f6388 | 2069 | } |
28ef6c31 JA |
2070 | /* Try to do something intelligent with blank lines encountered while |
2071 | entering multi-line commands. XXX - this is grotesque */ | |
ccc6cda3 JA |
2072 | else if (remember_on_history && shell_input_line && |
2073 | shell_input_line[0] == '\0' && | |
28ef6c31 | 2074 | current_command_line_count > 1) |
ccc6cda3 | 2075 | { |
28ef6c31 JA |
2076 | if (current_delimiter (dstack)) |
2077 | /* We know shell_input_line[0] == 0 and we're reading some sort of | |
2078 | quoted string. This means we've got a line consisting of only | |
2079 | a newline in a quoted string. We want to make sure this line | |
2080 | gets added to the history. */ | |
2081 | maybe_add_history (shell_input_line); | |
2082 | else | |
2083 | { | |
2084 | char *hdcs; | |
2085 | hdcs = history_delimiting_chars (); | |
2086 | if (hdcs && hdcs[0] == ';') | |
2087 | maybe_add_history (shell_input_line); | |
2088 | } | |
ccc6cda3 JA |
2089 | } |
2090 | ||
726f6388 JA |
2091 | #endif /* HISTORY */ |
2092 | ||
2093 | if (shell_input_line) | |
2094 | { | |
2095 | /* Lines that signify the end of the shell's input should not be | |
2096 | echoed. */ | |
2097 | if (echo_input_at_read && (shell_input_line[0] || | |
2098 | shell_input_line_terminator != EOF)) | |
2099 | fprintf (stderr, "%s\n", shell_input_line); | |
2100 | } | |
2101 | else | |
2102 | { | |
2103 | shell_input_line_size = 0; | |
2104 | prompt_string_pointer = ¤t_prompt_string; | |
d3a24ed2 CR |
2105 | if (SHOULD_PROMPT ()) |
2106 | prompt_again (); | |
726f6388 JA |
2107 | goto restart_read; |
2108 | } | |
2109 | ||
2110 | /* Add the newline to the end of this string, iff the string does | |
2111 | not already end in an EOF character. */ | |
2112 | if (shell_input_line_terminator != EOF) | |
2113 | { | |
ccc6cda3 | 2114 | if (shell_input_line_len + 3 > shell_input_line_size) |
f73dda09 | 2115 | shell_input_line = (char *)xrealloc (shell_input_line, |
726f6388 JA |
2116 | 1 + (shell_input_line_size += 2)); |
2117 | ||
ccc6cda3 JA |
2118 | shell_input_line[shell_input_line_len] = '\n'; |
2119 | shell_input_line[shell_input_line_len + 1] = '\0'; | |
7117c2d2 JA |
2120 | |
2121 | set_line_mbstate (); | |
726f6388 JA |
2122 | } |
2123 | } | |
ccc6cda3 | 2124 | |
f73dda09 | 2125 | uc = shell_input_line[shell_input_line_index]; |
726f6388 | 2126 | |
f73dda09 | 2127 | if (uc) |
726f6388 JA |
2128 | shell_input_line_index++; |
2129 | ||
cce855bc | 2130 | #if defined (ALIAS) || defined (DPAREN_ARITHMETIC) |
f73dda09 | 2131 | /* If UC is NULL, we have reached the end of the current input string. If |
726f6388 JA |
2132 | pushed_string_list is non-empty, it's time to pop to the previous string |
2133 | because we have fully consumed the result of the last alias expansion. | |
2134 | Do it transparently; just return the next character of the string popped | |
2135 | to. */ | |
f73dda09 | 2136 | if (!uc && (pushed_string_list != (STRING_SAVER *)NULL)) |
726f6388 | 2137 | { |
d3a24ed2 CR |
2138 | pop_string (); |
2139 | uc = shell_input_line[shell_input_line_index]; | |
2140 | if (uc) | |
2141 | shell_input_line_index++; | |
726f6388 | 2142 | } |
cce855bc | 2143 | #endif /* ALIAS || DPAREN_ARITHMETIC */ |
726f6388 | 2144 | |
10590446 CR |
2145 | if MBTEST(uc == '\\' && remove_quoted_newline && shell_input_line[shell_input_line_index] == '\n') |
2146 | { | |
2147 | if (SHOULD_PROMPT ()) | |
2148 | prompt_again (); | |
2149 | line_number++; | |
2150 | goto restart_read; | |
2151 | } | |
2152 | ||
f73dda09 | 2153 | if (!uc && shell_input_line_terminator == EOF) |
ccc6cda3 | 2154 | return ((shell_input_line_index != 0) ? '\n' : EOF); |
726f6388 | 2155 | |
f73dda09 | 2156 | return (uc); |
726f6388 JA |
2157 | } |
2158 | ||
7117c2d2 JA |
2159 | /* Put C back into the input for the shell. This might need changes for |
2160 | HANDLE_MULTIBYTE around EOLs. Since we (currently) never push back a | |
2161 | character different than we read, shell_input_line_property doesn't need | |
2162 | to change when manipulating shell_input_line. The define for | |
2163 | last_shell_getc_is_singlebyte should take care of it, though. */ | |
726f6388 JA |
2164 | static void |
2165 | shell_ungetc (c) | |
2166 | int c; | |
2167 | { | |
2168 | if (shell_input_line && shell_input_line_index) | |
2169 | shell_input_line[--shell_input_line_index] = c; | |
28ef6c31 JA |
2170 | else |
2171 | eol_ungetc_lookahead = c; | |
726f6388 JA |
2172 | } |
2173 | ||
f73dda09 JA |
2174 | #ifdef INCLUDE_UNUSED |
2175 | /* Back the input pointer up by one, effectively `ungetting' a character. */ | |
ccc6cda3 JA |
2176 | static void |
2177 | shell_ungetchar () | |
2178 | { | |
2179 | if (shell_input_line && shell_input_line_index) | |
2180 | shell_input_line_index--; | |
2181 | } | |
f73dda09 | 2182 | #endif |
ccc6cda3 JA |
2183 | |
2184 | /* Discard input until CHARACTER is seen, then push that character back | |
2185 | onto the input stream. */ | |
726f6388 JA |
2186 | static void |
2187 | discard_until (character) | |
2188 | int character; | |
2189 | { | |
2190 | int c; | |
2191 | ||
2192 | while ((c = shell_getc (0)) != EOF && c != character) | |
2193 | ; | |
2194 | ||
2195 | if (c != EOF) | |
2196 | shell_ungetc (c); | |
2197 | } | |
726f6388 JA |
2198 | |
2199 | void | |
d3ad40de CR |
2200 | execute_variable_command (command, vname) |
2201 | char *command, *vname; | |
726f6388 | 2202 | { |
726f6388 | 2203 | char *last_lastarg; |
d3a24ed2 | 2204 | sh_parser_state_t ps; |
726f6388 | 2205 | |
d3a24ed2 | 2206 | save_parser_state (&ps); |
726f6388 JA |
2207 | last_lastarg = get_string_value ("_"); |
2208 | if (last_lastarg) | |
2209 | last_lastarg = savestring (last_lastarg); | |
2210 | ||
d3ad40de | 2211 | parse_and_execute (savestring (command), vname, SEVAL_NONINT|SEVAL_NOHIST); |
726f6388 | 2212 | |
d3a24ed2 | 2213 | restore_parser_state (&ps); |
d11b8b46 | 2214 | bind_variable ("_", last_lastarg, 0); |
726f6388 JA |
2215 | FREE (last_lastarg); |
2216 | ||
ccc6cda3 | 2217 | if (token_to_read == '\n') /* reset_parser was called */ |
726f6388 JA |
2218 | token_to_read = 0; |
2219 | } | |
2220 | ||
ccc6cda3 JA |
2221 | /* Place to remember the token. We try to keep the buffer |
2222 | at a reasonable size, but it can grow. */ | |
2223 | static char *token = (char *)NULL; | |
2224 | ||
2225 | /* Current size of the token buffer. */ | |
2226 | static int token_buffer_size; | |
2227 | ||
726f6388 JA |
2228 | /* Command to read_token () explaining what we want it to do. */ |
2229 | #define READ 0 | |
2230 | #define RESET 1 | |
2231 | #define prompt_is_ps1 \ | |
2232 | (!prompt_string_pointer || prompt_string_pointer == &ps1_prompt) | |
2233 | ||
2234 | /* Function for yyparse to call. yylex keeps track of | |
2235 | the last two tokens read, and calls read_token. */ | |
ccc6cda3 | 2236 | static int |
726f6388 JA |
2237 | yylex () |
2238 | { | |
ccc6cda3 | 2239 | if (interactive && (current_token == 0 || current_token == '\n')) |
726f6388 JA |
2240 | { |
2241 | /* Before we print a prompt, we might have to check mailboxes. | |
2242 | We do this only if it is time to do so. Notice that only here | |
2243 | is the mail alarm reset; nothing takes place in check_mail () | |
2244 | except the checking of mail. Please don't change this. */ | |
2245 | if (prompt_is_ps1 && time_to_check_mail ()) | |
2246 | { | |
2247 | check_mail (); | |
2248 | reset_mail_timer (); | |
2249 | } | |
2250 | ||
2251 | /* Avoid printing a prompt if we're not going to read anything, e.g. | |
2252 | after resetting the parser with read_token (RESET). */ | |
d3a24ed2 | 2253 | if (token_to_read == 0 && SHOULD_PROMPT ()) |
726f6388 JA |
2254 | prompt_again (); |
2255 | } | |
2256 | ||
ccc6cda3 | 2257 | two_tokens_ago = token_before_that; |
726f6388 JA |
2258 | token_before_that = last_read_token; |
2259 | last_read_token = current_token; | |
2260 | current_token = read_token (READ); | |
2261 | return (current_token); | |
2262 | } | |
2263 | ||
726f6388 JA |
2264 | /* When non-zero, we have read the required tokens |
2265 | which allow ESAC to be the next one read. */ | |
ccc6cda3 | 2266 | static int esacs_needed_count; |
726f6388 JA |
2267 | |
2268 | void | |
2269 | gather_here_documents () | |
2270 | { | |
2271 | int r = 0; | |
2272 | while (need_here_doc) | |
2273 | { | |
2274 | make_here_document (redir_stack[r++]); | |
2275 | need_here_doc--; | |
2276 | } | |
2277 | } | |
2278 | ||
726f6388 JA |
2279 | /* When non-zero, an open-brace used to create a group is awaiting a close |
2280 | brace partner. */ | |
ccc6cda3 | 2281 | static int open_brace_count; |
726f6388 JA |
2282 | |
2283 | #define command_token_position(token) \ | |
2284 | (((token) == ASSIGNMENT_WORD) || \ | |
8943768b | 2285 | ((token) != SEMI_SEMI && (token) != SEMI_AND && (token) != SEMI_SEMI_AND && reserved_word_acceptable(token))) |
726f6388 | 2286 | |
d3a24ed2 CR |
2287 | #define assignment_acceptable(token) \ |
2288 | (command_token_position(token) && ((parser_state & PST_CASEPAT) == 0)) | |
726f6388 JA |
2289 | |
2290 | /* Check to see if TOKEN is a reserved word and return the token | |
2291 | value if it is. */ | |
2292 | #define CHECK_FOR_RESERVED_WORD(tok) \ | |
2293 | do { \ | |
2294 | if (!dollar_present && !quoted && \ | |
2295 | reserved_word_acceptable (last_read_token)) \ | |
2296 | { \ | |
2297 | int i; \ | |
2298 | for (i = 0; word_token_alist[i].word != (char *)NULL; i++) \ | |
2299 | if (STREQ (tok, word_token_alist[i].word)) \ | |
2300 | { \ | |
ccc6cda3 | 2301 | if ((parser_state & PST_CASEPAT) && (word_token_alist[i].token != ESAC)) \ |
726f6388 | 2302 | break; \ |
d3a24ed2 | 2303 | if (word_token_alist[i].token == TIME && time_command_acceptable () == 0) \ |
cce855bc | 2304 | break; \ |
726f6388 | 2305 | if (word_token_alist[i].token == ESAC) \ |
ccc6cda3 JA |
2306 | parser_state &= ~(PST_CASEPAT|PST_CASESTMT); \ |
2307 | else if (word_token_alist[i].token == CASE) \ | |
2308 | parser_state |= PST_CASESTMT; \ | |
cce855bc JA |
2309 | else if (word_token_alist[i].token == COND_END) \ |
2310 | parser_state &= ~(PST_CONDCMD|PST_CONDEXPR); \ | |
2311 | else if (word_token_alist[i].token == COND_START) \ | |
2312 | parser_state |= PST_CONDCMD; \ | |
ccc6cda3 JA |
2313 | else if (word_token_alist[i].token == '{') \ |
2314 | open_brace_count++; \ | |
2315 | else if (word_token_alist[i].token == '}' && open_brace_count) \ | |
2316 | open_brace_count--; \ | |
726f6388 JA |
2317 | return (word_token_alist[i].token); \ |
2318 | } \ | |
2319 | } \ | |
2320 | } while (0) | |
2321 | ||
ccc6cda3 JA |
2322 | #if defined (ALIAS) |
2323 | ||
2324 | /* OK, we have a token. Let's try to alias expand it, if (and only if) | |
2325 | it's eligible. | |
2326 | ||
7117c2d2 | 2327 | It is eligible for expansion if EXPAND_ALIASES is set, and |
ccc6cda3 JA |
2328 | the token is unquoted and the last token read was a command |
2329 | separator (or expand_next_token is set), and we are currently | |
2330 | processing an alias (pushed_string_list is non-empty) and this | |
2331 | token is not the same as the current or any previously | |
2332 | processed alias. | |
2333 | ||
2334 | Special cases that disqualify: | |
2335 | In a pattern list in a case statement (parser_state & PST_CASEPAT). */ | |
d3a24ed2 CR |
2336 | |
2337 | static char * | |
2338 | mk_alexpansion (s) | |
2339 | char *s; | |
2340 | { | |
2341 | int l; | |
2342 | char *r; | |
2343 | ||
2344 | l = strlen (s); | |
2345 | r = xmalloc (l + 2); | |
2346 | strcpy (r, s); | |
2347 | if (r[l -1] != ' ') | |
2348 | r[l++] = ' '; | |
2349 | r[l] = '\0'; | |
2350 | return r; | |
2351 | } | |
2352 | ||
ccc6cda3 | 2353 | static int |
f73dda09 JA |
2354 | alias_expand_token (tokstr) |
2355 | char *tokstr; | |
726f6388 | 2356 | { |
ccc6cda3 JA |
2357 | char *expanded; |
2358 | alias_t *ap; | |
726f6388 | 2359 | |
ccc6cda3 JA |
2360 | if (((parser_state & PST_ALEXPNEXT) || command_token_position (last_read_token)) && |
2361 | (parser_state & PST_CASEPAT) == 0) | |
726f6388 | 2362 | { |
f73dda09 | 2363 | ap = find_alias (tokstr); |
ccc6cda3 JA |
2364 | |
2365 | /* Currently expanding this token. */ | |
2366 | if (ap && (ap->flags & AL_BEINGEXPANDED)) | |
2367 | return (NO_EXPANSION); | |
2368 | ||
d3a24ed2 CR |
2369 | /* mk_alexpansion puts an extra space on the end of the alias expansion, |
2370 | so the lookahead by the parser works right. If this gets changed, | |
2371 | make sure the code in shell_getc that deals with reaching the end of | |
2372 | an expanded alias is changed with it. */ | |
2373 | expanded = ap ? mk_alexpansion (ap->value) : (char *)NULL; | |
2374 | ||
ccc6cda3 JA |
2375 | if (expanded) |
2376 | { | |
2377 | push_string (expanded, ap->flags & AL_EXPANDNEXT, ap); | |
2378 | return (RE_READ_TOKEN); | |
2379 | } | |
2380 | else | |
2381 | /* This is an eligible token that does not have an expansion. */ | |
2382 | return (NO_EXPANSION); | |
726f6388 | 2383 | } |
ccc6cda3 JA |
2384 | return (NO_EXPANSION); |
2385 | } | |
2386 | #endif /* ALIAS */ | |
726f6388 | 2387 | |
cce855bc JA |
2388 | static int |
2389 | time_command_acceptable () | |
2390 | { | |
2391 | #if defined (COMMAND_TIMING) | |
2392 | switch (last_read_token) | |
2393 | { | |
2394 | case 0: | |
2395 | case ';': | |
2396 | case '\n': | |
2397 | case AND_AND: | |
2398 | case OR_OR: | |
2399 | case '&': | |
b72432fd JA |
2400 | case DO: |
2401 | case THEN: | |
2402 | case ELSE: | |
28ef6c31 JA |
2403 | case '{': /* } */ |
2404 | case '(': /* ) */ | |
cce855bc JA |
2405 | return 1; |
2406 | default: | |
2407 | return 0; | |
2408 | } | |
2409 | #else | |
2410 | return 0; | |
2411 | #endif /* COMMAND_TIMING */ | |
2412 | } | |
2413 | ||
ccc6cda3 JA |
2414 | /* Handle special cases of token recognition: |
2415 | IN is recognized if the last token was WORD and the token | |
2416 | before that was FOR or CASE or SELECT. | |
2417 | ||
2418 | DO is recognized if the last token was WORD and the token | |
2419 | before that was FOR or SELECT. | |
2420 | ||
2421 | ESAC is recognized if the last token caused `esacs_needed_count' | |
2422 | to be set | |
2423 | ||
2424 | `{' is recognized if the last token as WORD and the token | |
28ef6c31 JA |
2425 | before that was FUNCTION, or if we just parsed an arithmetic |
2426 | `for' command. | |
ccc6cda3 | 2427 | |
28ef6c31 | 2428 | `}' is recognized if there is an unclosed `{' present. |
cce855bc JA |
2429 | |
2430 | `-p' is returned as TIMEOPT if the last read token was TIME. | |
2431 | ||
2432 | ']]' is returned as COND_END if the parser is currently parsing | |
2433 | a conditional expression ((parser_state & PST_CONDEXPR) != 0) | |
2434 | ||
2435 | `time' is returned as TIME if and only if it is immediately | |
2436 | preceded by one of `;', `\n', `||', `&&', or `&'. | |
ccc6cda3 JA |
2437 | */ |
2438 | ||
2439 | static int | |
f73dda09 JA |
2440 | special_case_tokens (tokstr) |
2441 | char *tokstr; | |
ccc6cda3 JA |
2442 | { |
2443 | if ((last_read_token == WORD) && | |
2444 | #if defined (SELECT_COMMAND) | |
2445 | ((token_before_that == FOR) || (token_before_that == CASE) || (token_before_that == SELECT)) && | |
2446 | #else | |
2447 | ((token_before_that == FOR) || (token_before_that == CASE)) && | |
2448 | #endif | |
f73dda09 | 2449 | (tokstr[0] == 'i' && tokstr[1] == 'n' && tokstr[2] == 0)) |
726f6388 | 2450 | { |
ccc6cda3 JA |
2451 | if (token_before_that == CASE) |
2452 | { | |
2453 | parser_state |= PST_CASEPAT; | |
2454 | esacs_needed_count++; | |
2455 | } | |
2456 | return (IN); | |
2457 | } | |
726f6388 | 2458 | |
ccc6cda3 JA |
2459 | if (last_read_token == WORD && |
2460 | #if defined (SELECT_COMMAND) | |
2461 | (token_before_that == FOR || token_before_that == SELECT) && | |
2462 | #else | |
2463 | (token_before_that == FOR) && | |
2464 | #endif | |
f73dda09 | 2465 | (tokstr[0] == 'd' && tokstr[1] == 'o' && tokstr[2] == '\0')) |
ccc6cda3 JA |
2466 | return (DO); |
2467 | ||
2468 | /* Ditto for ESAC in the CASE case. | |
2469 | Specifically, this handles "case word in esac", which is a legal | |
2470 | construct, certainly because someone will pass an empty arg to the | |
2471 | case construct, and we don't want it to barf. Of course, we should | |
2472 | insist that the case construct has at least one pattern in it, but | |
2473 | the designers disagree. */ | |
2474 | if (esacs_needed_count) | |
2475 | { | |
2476 | esacs_needed_count--; | |
f73dda09 | 2477 | if (STREQ (tokstr, "esac")) |
726f6388 | 2478 | { |
ccc6cda3 JA |
2479 | parser_state &= ~PST_CASEPAT; |
2480 | return (ESAC); | |
726f6388 | 2481 | } |
ccc6cda3 | 2482 | } |
726f6388 | 2483 | |
ccc6cda3 JA |
2484 | /* The start of a shell function definition. */ |
2485 | if (parser_state & PST_ALLOWOPNBRC) | |
2486 | { | |
2487 | parser_state &= ~PST_ALLOWOPNBRC; | |
f73dda09 | 2488 | if (tokstr[0] == '{' && tokstr[1] == '\0') /* } */ |
726f6388 | 2489 | { |
ccc6cda3 JA |
2490 | open_brace_count++; |
2491 | function_bstart = line_number; | |
2492 | return ('{'); /* } */ | |
726f6388 | 2493 | } |
ccc6cda3 JA |
2494 | } |
2495 | ||
28ef6c31 JA |
2496 | /* We allow a `do' after a for ((...)) without an intervening |
2497 | list_terminator */ | |
f73dda09 | 2498 | if (last_read_token == ARITH_FOR_EXPRS && tokstr[0] == 'd' && tokstr[1] == 'o' && !tokstr[2]) |
28ef6c31 | 2499 | return (DO); |
f73dda09 | 2500 | if (last_read_token == ARITH_FOR_EXPRS && tokstr[0] == '{' && tokstr[1] == '\0') /* } */ |
28ef6c31 JA |
2501 | { |
2502 | open_brace_count++; | |
2503 | return ('{'); /* } */ | |
2504 | } | |
2505 | ||
f73dda09 | 2506 | if (open_brace_count && reserved_word_acceptable (last_read_token) && tokstr[0] == '}' && !tokstr[1]) |
ccc6cda3 JA |
2507 | { |
2508 | open_brace_count--; /* { */ | |
2509 | return ('}'); | |
2510 | } | |
2511 | ||
cce855bc | 2512 | #if defined (COMMAND_TIMING) |
ccc6cda3 | 2513 | /* Handle -p after `time'. */ |
f73dda09 | 2514 | if (last_read_token == TIME && tokstr[0] == '-' && tokstr[1] == 'p' && !tokstr[2]) |
ccc6cda3 | 2515 | return (TIMEOPT); |
cce855bc JA |
2516 | #endif |
2517 | ||
d3a24ed2 | 2518 | #if 0 |
cce855bc | 2519 | #if defined (COMMAND_TIMING) |
b72432fd | 2520 | if (STREQ (token, "time") && ((parser_state & PST_CASEPAT) == 0) && time_command_acceptable ()) |
cce855bc JA |
2521 | return (TIME); |
2522 | #endif /* COMMAND_TIMING */ | |
d3a24ed2 | 2523 | #endif |
cce855bc JA |
2524 | |
2525 | #if defined (COND_COMMAND) /* [[ */ | |
f73dda09 | 2526 | if ((parser_state & PST_CONDEXPR) && tokstr[0] == ']' && tokstr[1] == ']' && tokstr[2] == '\0') |
cce855bc JA |
2527 | return (COND_END); |
2528 | #endif | |
726f6388 | 2529 | |
ccc6cda3 JA |
2530 | return (-1); |
2531 | } | |
2532 | ||
2533 | /* Called from shell.c when Control-C is typed at top level. Or | |
2534 | by the error rule at top level. */ | |
2535 | void | |
2536 | reset_parser () | |
2537 | { | |
2538 | dstack.delimiter_depth = 0; /* No delimiters found so far. */ | |
2539 | open_brace_count = 0; | |
2540 | ||
2541 | parser_state = 0; | |
2542 | ||
cce855bc | 2543 | #if defined (ALIAS) || defined (DPAREN_ARITHMETIC) |
ccc6cda3 | 2544 | if (pushed_string_list) |
cce855bc JA |
2545 | free_string_list (); |
2546 | #endif /* ALIAS || DPAREN_ARITHMETIC */ | |
726f6388 | 2547 | |
ccc6cda3 JA |
2548 | if (shell_input_line) |
2549 | { | |
2550 | free (shell_input_line); | |
2551 | shell_input_line = (char *)NULL; | |
2552 | shell_input_line_size = shell_input_line_index = 0; | |
2553 | } | |
2554 | ||
2555 | FREE (word_desc_to_read); | |
2556 | word_desc_to_read = (WORD_DESC *)NULL; | |
2557 | ||
2558 | last_read_token = '\n'; | |
2559 | token_to_read = '\n'; | |
2560 | } | |
2561 | ||
2562 | /* Read the next token. Command can be READ (normal operation) or | |
2563 | RESET (to normalize state). */ | |
2564 | static int | |
2565 | read_token (command) | |
2566 | int command; | |
2567 | { | |
2568 | int character; /* Current character. */ | |
2569 | int peek_char; /* Temporary look-ahead character. */ | |
2570 | int result; /* The thing to return. */ | |
2571 | ||
2572 | if (command == RESET) | |
2573 | { | |
2574 | reset_parser (); | |
726f6388 JA |
2575 | return ('\n'); |
2576 | } | |
2577 | ||
2578 | if (token_to_read) | |
2579 | { | |
ccc6cda3 JA |
2580 | result = token_to_read; |
2581 | if (token_to_read == WORD || token_to_read == ASSIGNMENT_WORD) | |
d166f048 JA |
2582 | { |
2583 | yylval.word = word_desc_to_read; | |
2584 | word_desc_to_read = (WORD_DESC *)NULL; | |
2585 | } | |
726f6388 | 2586 | token_to_read = 0; |
ccc6cda3 | 2587 | return (result); |
726f6388 JA |
2588 | } |
2589 | ||
cce855bc JA |
2590 | #if defined (COND_COMMAND) |
2591 | if ((parser_state & (PST_CONDCMD|PST_CONDEXPR)) == PST_CONDCMD) | |
2592 | { | |
2593 | cond_lineno = line_number; | |
2594 | parser_state |= PST_CONDEXPR; | |
2595 | yylval.command = parse_cond_command (); | |
2596 | if (cond_token != COND_END) | |
2597 | { | |
7117c2d2 | 2598 | cond_error (); |
cce855bc JA |
2599 | return (-1); |
2600 | } | |
2601 | token_to_read = COND_END; | |
2602 | parser_state &= ~(PST_CONDEXPR|PST_CONDCMD); | |
2603 | return (COND_CMD); | |
2604 | } | |
2605 | #endif | |
2606 | ||
726f6388 | 2607 | #if defined (ALIAS) |
726f6388 JA |
2608 | /* This is a place to jump back to once we have successfully expanded a |
2609 | token with an alias and pushed the string with push_string () */ | |
2610 | re_read_token: | |
726f6388 JA |
2611 | #endif /* ALIAS */ |
2612 | ||
2613 | /* Read a single word from input. Start by skipping blanks. */ | |
d3ad40de | 2614 | while ((character = shell_getc (1)) != EOF && shellblank (character)) |
ccc6cda3 | 2615 | ; |
726f6388 JA |
2616 | |
2617 | if (character == EOF) | |
2618 | { | |
2619 | EOF_Reached = 1; | |
2620 | return (yacc_EOF); | |
2621 | } | |
2622 | ||
7117c2d2 | 2623 | if MBTEST(character == '#' && (!interactive || interactive_comments)) |
726f6388 JA |
2624 | { |
2625 | /* A comment. Discard until EOL or EOF, and then return a newline. */ | |
2626 | discard_until ('\n'); | |
2627 | shell_getc (0); | |
ccc6cda3 | 2628 | character = '\n'; /* this will take the next if statement and return. */ |
726f6388 JA |
2629 | } |
2630 | ||
2631 | if (character == '\n') | |
2632 | { | |
2633 | /* If we're about to return an unquoted newline, we can go and collect | |
2634 | the text of any pending here document. */ | |
2635 | if (need_here_doc) | |
2636 | gather_here_documents (); | |
2637 | ||
2638 | #if defined (ALIAS) | |
ccc6cda3 | 2639 | parser_state &= ~PST_ALEXPNEXT; |
726f6388 JA |
2640 | #endif /* ALIAS */ |
2641 | ||
301e2142 CR |
2642 | parser_state &= ~PST_ASSIGNOK; |
2643 | ||
726f6388 JA |
2644 | return (character); |
2645 | } | |
2646 | ||
d3ad40de CR |
2647 | if (parser_state & PST_REGEXP) |
2648 | goto tokword; | |
2649 | ||
ccc6cda3 | 2650 | /* Shell meta-characters. */ |
7117c2d2 | 2651 | if MBTEST(shellmeta (character) && ((parser_state & PST_DBLPAREN) == 0)) |
726f6388 JA |
2652 | { |
2653 | #if defined (ALIAS) | |
2654 | /* Turn off alias tokenization iff this character sequence would | |
2655 | not leave us ready to read a command. */ | |
2656 | if (character == '<' || character == '>') | |
ccc6cda3 | 2657 | parser_state &= ~PST_ALEXPNEXT; |
726f6388 JA |
2658 | #endif /* ALIAS */ |
2659 | ||
301e2142 CR |
2660 | parser_state &= ~PST_ASSIGNOK; |
2661 | ||
ccc6cda3 JA |
2662 | peek_char = shell_getc (1); |
2663 | if (character == peek_char) | |
726f6388 JA |
2664 | { |
2665 | switch (character) | |
2666 | { | |
ccc6cda3 | 2667 | case '<': |
726f6388 JA |
2668 | /* If '<' then we could be at "<<" or at "<<-". We have to |
2669 | look ahead one more character. */ | |
726f6388 | 2670 | peek_char = shell_getc (1); |
6a8fd0ed | 2671 | if MBTEST(peek_char == '-') |
726f6388 | 2672 | return (LESS_LESS_MINUS); |
6a8fd0ed | 2673 | else if MBTEST(peek_char == '<') |
7117c2d2 | 2674 | return (LESS_LESS_LESS); |
726f6388 JA |
2675 | else |
2676 | { | |
2677 | shell_ungetc (peek_char); | |
2678 | return (LESS_LESS); | |
2679 | } | |
2680 | ||
2681 | case '>': | |
2682 | return (GREATER_GREATER); | |
2683 | ||
2684 | case ';': | |
ccc6cda3 | 2685 | parser_state |= PST_CASEPAT; |
726f6388 | 2686 | #if defined (ALIAS) |
ccc6cda3 | 2687 | parser_state &= ~PST_ALEXPNEXT; |
726f6388 | 2688 | #endif /* ALIAS */ |
8943768b CR |
2689 | peek_char = shell_getc (1); |
2690 | if MBTEST(peek_char == '&') | |
2691 | return (SEMI_SEMI_AND); | |
2692 | else | |
2693 | { | |
2694 | shell_ungetc (peek_char); | |
2695 | return (SEMI_SEMI); | |
2696 | } | |
726f6388 JA |
2697 | |
2698 | case '&': | |
2699 | return (AND_AND); | |
2700 | ||
2701 | case '|': | |
2702 | return (OR_OR); | |
ccc6cda3 | 2703 | |
bb70624e | 2704 | #if defined (DPAREN_ARITHMETIC) || defined (ARITH_FOR_COMMAND) |
ccc6cda3 | 2705 | case '(': /* ) */ |
7117c2d2 JA |
2706 | result = parse_dparen (character); |
2707 | if (result == -2) | |
2708 | break; | |
2709 | else | |
2710 | return result; | |
ccc6cda3 | 2711 | #endif |
726f6388 | 2712 | } |
726f6388 | 2713 | } |
7117c2d2 | 2714 | else if MBTEST(character == '<' && peek_char == '&') |
ccc6cda3 | 2715 | return (LESS_AND); |
7117c2d2 | 2716 | else if MBTEST(character == '>' && peek_char == '&') |
ccc6cda3 | 2717 | return (GREATER_AND); |
7117c2d2 | 2718 | else if MBTEST(character == '<' && peek_char == '>') |
ccc6cda3 | 2719 | return (LESS_GREATER); |
7117c2d2 | 2720 | else if MBTEST(character == '>' && peek_char == '|') |
ccc6cda3 | 2721 | return (GREATER_BAR); |
8943768b CR |
2722 | else if MBTEST(character == '&' && peek_char == '>') |
2723 | { | |
2724 | peek_char = shell_getc (1); | |
2725 | if MBTEST(peek_char == '>') | |
2726 | return (AND_GREATER_GREATER); | |
2727 | else | |
2728 | { | |
2729 | shell_ungetc (peek_char); | |
2730 | return (AND_GREATER); | |
2731 | } | |
2732 | } | |
2733 | else if MBTEST(character == '|' && peek_char == '&') | |
2734 | return (BAR_AND); | |
2735 | else if MBTEST(character == ';' && peek_char == '&') | |
2736 | { | |
2737 | parser_state |= PST_CASEPAT; | |
2738 | #if defined (ALIAS) | |
2739 | parser_state &= ~PST_ALEXPNEXT; | |
2740 | #endif /* ALIAS */ | |
2741 | return (SEMI_AND); | |
2742 | } | |
ccc6cda3 | 2743 | |
726f6388 JA |
2744 | shell_ungetc (peek_char); |
2745 | ||
2746 | /* If we look like we are reading the start of a function | |
2747 | definition, then let the reader know about it so that | |
2748 | we will do the right thing with `{'. */ | |
7117c2d2 | 2749 | if MBTEST(character == ')' && last_read_token == '(' && token_before_that == WORD) |
726f6388 | 2750 | { |
ccc6cda3 | 2751 | parser_state |= PST_ALLOWOPNBRC; |
726f6388 | 2752 | #if defined (ALIAS) |
ccc6cda3 | 2753 | parser_state &= ~PST_ALEXPNEXT; |
726f6388 | 2754 | #endif /* ALIAS */ |
ccc6cda3 | 2755 | function_dstart = line_number; |
726f6388 JA |
2756 | } |
2757 | ||
ccc6cda3 JA |
2758 | /* case pattern lists may be preceded by an optional left paren. If |
2759 | we're not trying to parse a case pattern list, the left paren | |
2760 | indicates a subshell. */ | |
7117c2d2 | 2761 | if MBTEST(character == '(' && (parser_state & PST_CASEPAT) == 0) /* ) */ |
ccc6cda3 JA |
2762 | parser_state |= PST_SUBSHELL; |
2763 | /*(*/ | |
7117c2d2 | 2764 | else if MBTEST((parser_state & PST_CASEPAT) && character == ')') |
28ef6c31 | 2765 | parser_state &= ~PST_CASEPAT; |
ccc6cda3 | 2766 | /*(*/ |
7117c2d2 | 2767 | else if MBTEST((parser_state & PST_SUBSHELL) && character == ')') |
ccc6cda3 | 2768 | parser_state &= ~PST_SUBSHELL; |
726f6388 JA |
2769 | |
2770 | #if defined (PROCESS_SUBSTITUTION) | |
2771 | /* Check for the constructs which introduce process substitution. | |
2772 | Shells running in `posix mode' don't do process substitution. */ | |
7117c2d2 | 2773 | if MBTEST(posixly_correct || ((character != '>' && character != '<') || peek_char != '(')) /*)*/ |
726f6388 JA |
2774 | #endif /* PROCESS_SUBSTITUTION */ |
2775 | return (character); | |
2776 | } | |
2777 | ||
7117c2d2 JA |
2778 | /* Hack <&- (close stdin) case. Also <&N- (dup and close). */ |
2779 | if MBTEST(character == '-' && (last_read_token == LESS_AND || last_read_token == GREATER_AND)) | |
ccc6cda3 JA |
2780 | return (character); |
2781 | ||
d3ad40de | 2782 | tokword: |
726f6388 JA |
2783 | /* Okay, if we got this far, we have to read a word. Read one, |
2784 | and then check it against the known ones. */ | |
ccc6cda3 JA |
2785 | result = read_token_word (character); |
2786 | #if defined (ALIAS) | |
2787 | if (result == RE_READ_TOKEN) | |
2788 | goto re_read_token; | |
2789 | #endif | |
2790 | return result; | |
2791 | } | |
726f6388 | 2792 | |
7117c2d2 JA |
2793 | /* |
2794 | * Match a $(...) or other grouping construct. This has to handle embedded | |
2795 | * quoted strings ('', ``, "") and nested constructs. It also must handle | |
fd3925f1 CR |
2796 | * reprompting the user, if necessary, after reading a newline, and returning |
2797 | * correct error values if it reads EOF. | |
7117c2d2 | 2798 | */ |
b72432fd | 2799 | #define P_FIRSTCLOSE 0x01 |
bb70624e | 2800 | #define P_ALLOWESC 0x02 |
d3a24ed2 | 2801 | #define P_DQUOTE 0x04 |
f6410766 | 2802 | #define P_COMMAND 0x08 /* parsing a command, so look for comments */ |
27a1808c | 2803 | #define P_BACKQUOTE 0x10 /* parsing a backquoted command substitution */ |
b72432fd | 2804 | |
8943768b CR |
2805 | /* Lexical state while parsing a grouping construct or $(...). */ |
2806 | #define LEX_WASDOL 0x001 | |
2807 | #define LEX_CKCOMMENT 0x002 | |
2808 | #define LEX_INCOMMENT 0x004 | |
2809 | #define LEX_PASSNEXT 0x008 | |
2810 | #define LEX_RESWDOK 0x010 | |
2811 | #define LEX_CKCASE 0x020 | |
2812 | #define LEX_INCASE 0x040 | |
2813 | #define LEX_INHEREDOC 0x080 | |
2814 | #define LEX_HEREDELIM 0x100 /* reading here-doc delimiter */ | |
2815 | #define LEX_STRIPDOC 0x200 /* <<- strip tabs from here doc delim */ | |
2816 | ||
ed35cb4a | 2817 | #define COMSUB_META(ch) ((ch) == ';' || (ch) == '&' || (ch) == '|') |
8943768b CR |
2818 | |
2819 | #define CHECK_NESTRET_ERROR() \ | |
2820 | do { \ | |
2821 | if (nestret == &matched_pair_error) \ | |
2822 | { \ | |
2823 | free (ret); \ | |
2824 | return &matched_pair_error; \ | |
2825 | } \ | |
2826 | } while (0) | |
2827 | ||
2828 | #define APPEND_NESTRET() \ | |
2829 | do { \ | |
2830 | if (nestlen) \ | |
2831 | { \ | |
2832 | RESIZE_MALLOCED_BUFFER (ret, retind, nestlen, retsize, 64); \ | |
2833 | strcpy (ret + retind, nestret); \ | |
2834 | retind += nestlen; \ | |
2835 | } \ | |
2836 | } while (0) | |
2837 | ||
ccc6cda3 | 2838 | static char matched_pair_error; |
8943768b | 2839 | |
ccc6cda3 JA |
2840 | static char * |
2841 | parse_matched_pair (qc, open, close, lenp, flags) | |
2842 | int qc; /* `"' if this construct is within double quotes */ | |
2843 | int open, close; | |
2844 | int *lenp, flags; | |
2845 | { | |
ed35cb4a CR |
2846 | int count, ch, tflags; |
2847 | int nestlen, ttranslen, start_lineno; | |
28ef6c31 | 2848 | char *ret, *nestret, *ttrans; |
d3a24ed2 | 2849 | int retind, retsize, rflags; |
726f6388 | 2850 | |
462a7a25 | 2851 | /* itrace("parse_matched_pair: open = %c close = %c", open, close); */ |
ccc6cda3 | 2852 | count = 1; |
ed35cb4a CR |
2853 | tflags = 0; |
2854 | ||
2855 | if ((flags & P_COMMAND) && qc != '`' && qc != '\'' && qc != '"' && (flags & P_DQUOTE) == 0) | |
2856 | tflags |= LEX_CKCOMMENT; | |
726f6388 | 2857 | |
d3a24ed2 CR |
2858 | /* RFLAGS is the set of flags we want to pass to recursive calls. */ |
2859 | rflags = (qc == '"') ? P_DQUOTE : (flags & P_DQUOTE); | |
2860 | ||
f73dda09 | 2861 | ret = (char *)xmalloc (retsize = 64); |
ccc6cda3 | 2862 | retind = 0; |
726f6388 | 2863 | |
ccc6cda3 JA |
2864 | start_lineno = line_number; |
2865 | while (count) | |
2866 | { | |
ed35cb4a | 2867 | ch = shell_getc (qc != '\'' && (tflags & LEX_PASSNEXT) == 0); |
b317c077 | 2868 | |
ccc6cda3 JA |
2869 | if (ch == EOF) |
2870 | { | |
2871 | free (ret); | |
5e13499c | 2872 | parser_error (start_lineno, _("unexpected EOF while looking for matching `%c'"), close); |
ccc6cda3 JA |
2873 | EOF_Reached = 1; /* XXX */ |
2874 | return (&matched_pair_error); | |
2875 | } | |
726f6388 | 2876 | |
ccc6cda3 | 2877 | /* Possible reprompting. */ |
d3a24ed2 | 2878 | if (ch == '\n' && SHOULD_PROMPT ()) |
ccc6cda3 | 2879 | prompt_again (); |
726f6388 | 2880 | |
ed35cb4a CR |
2881 | /* Don't bother counting parens or doing anything else if in a comment |
2882 | or part of a case statement */ | |
2883 | if (tflags & LEX_INCOMMENT) | |
f6410766 CR |
2884 | { |
2885 | /* Add this character. */ | |
2886 | RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64); | |
2887 | ret[retind++] = ch; | |
2888 | ||
2889 | if (ch == '\n') | |
ed35cb4a | 2890 | tflags &= ~LEX_INCOMMENT; |
f6410766 CR |
2891 | |
2892 | continue; | |
2893 | } | |
ed35cb4a | 2894 | |
d3ad40de CR |
2895 | /* Not exactly right yet, should handle shell metacharacters, too. If |
2896 | any changes are made to this test, make analogous changes to subst.c: | |
2897 | extract_delimited_string(). */ | |
ed35cb4a CR |
2898 | else if MBTEST((tflags & LEX_CKCOMMENT) && (tflags & LEX_INCOMMENT) == 0 && ch == '#' && (retind == 0 || ret[retind-1] == '\n' || whitespace (ret[retind - 1]))) |
2899 | tflags |= LEX_INCOMMENT; | |
27a1808c | 2900 | |
ed35cb4a | 2901 | if (tflags & LEX_PASSNEXT) /* last char was backslash */ |
ccc6cda3 | 2902 | { |
ed35cb4a | 2903 | tflags &= ~LEX_PASSNEXT; |
ccc6cda3 JA |
2904 | if (qc != '\'' && ch == '\n') /* double-quoted \<newline> disappears. */ |
2905 | { | |
ed35cb4a CR |
2906 | if (retind > 0) |
2907 | retind--; /* swallow previously-added backslash */ | |
ccc6cda3 JA |
2908 | continue; |
2909 | } | |
726f6388 | 2910 | |
ccc6cda3 | 2911 | RESIZE_MALLOCED_BUFFER (ret, retind, 2, retsize, 64); |
7117c2d2 | 2912 | if MBTEST(ch == CTLESC || ch == CTLNUL) |
ccc6cda3 JA |
2913 | ret[retind++] = CTLESC; |
2914 | ret[retind++] = ch; | |
2915 | continue; | |
2916 | } | |
7117c2d2 | 2917 | else if MBTEST(ch == CTLESC || ch == CTLNUL) /* special shell escapes */ |
ccc6cda3 JA |
2918 | { |
2919 | RESIZE_MALLOCED_BUFFER (ret, retind, 2, retsize, 64); | |
2920 | ret[retind++] = CTLESC; | |
2921 | ret[retind++] = ch; | |
2922 | continue; | |
2923 | } | |
7117c2d2 | 2924 | else if MBTEST(ch == close) /* ending delimiter */ |
ccc6cda3 | 2925 | count--; |
bb70624e | 2926 | /* handle nested ${...} specially. */ |
ed35cb4a | 2927 | else if MBTEST(open != close && (tflags & LEX_WASDOL) && open == '{' && ch == open) /* } */ |
28ef6c31 | 2928 | count++; |
7117c2d2 | 2929 | else if MBTEST(((flags & P_FIRSTCLOSE) == 0) && ch == open) /* nested begin */ |
ccc6cda3 | 2930 | count++; |
726f6388 | 2931 | |
ccc6cda3 JA |
2932 | /* Add this character. */ |
2933 | RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64); | |
2934 | ret[retind++] = ch; | |
726f6388 | 2935 | |
ed35cb4a CR |
2936 | /* If we just read the ending character, don't bother continuing. */ |
2937 | if (count == 0) | |
2938 | break; | |
2939 | ||
ccc6cda3 | 2940 | if (open == '\'') /* '' inside grouping construct */ |
bb70624e | 2941 | { |
7117c2d2 | 2942 | if MBTEST((flags & P_ALLOWESC) && ch == '\\') |
ed35cb4a | 2943 | tflags |= LEX_PASSNEXT; |
bb70624e JA |
2944 | continue; |
2945 | } | |
726f6388 | 2946 | |
7117c2d2 | 2947 | if MBTEST(ch == '\\') /* backslashes */ |
ed35cb4a | 2948 | tflags |= LEX_PASSNEXT; |
726f6388 | 2949 | |
ed35cb4a CR |
2950 | /* Could also check open == '`' if we want to parse grouping constructs |
2951 | inside old-style command substitution. */ | |
ccc6cda3 JA |
2952 | if (open != close) /* a grouping construct */ |
2953 | { | |
7117c2d2 | 2954 | if MBTEST(shellquote (ch)) |
ccc6cda3 JA |
2955 | { |
2956 | /* '', ``, or "" inside $(...) or other grouping construct. */ | |
2957 | push_delimiter (dstack, ch); | |
ed35cb4a | 2958 | if MBTEST((tflags & LEX_WASDOL) && ch == '\'') /* $'...' inside group */ |
d3a24ed2 | 2959 | nestret = parse_matched_pair (ch, ch, ch, &nestlen, P_ALLOWESC|rflags); |
28ef6c31 | 2960 | else |
d3a24ed2 | 2961 | nestret = parse_matched_pair (ch, ch, ch, &nestlen, rflags); |
ccc6cda3 | 2962 | pop_delimiter (dstack); |
ed35cb4a CR |
2963 | CHECK_NESTRET_ERROR (); |
2964 | ||
2965 | if MBTEST((tflags & LEX_WASDOL) && ch == '\'' && (extended_quote || (rflags & P_DQUOTE) == 0)) | |
28ef6c31 JA |
2966 | { |
2967 | /* Translate $'...' here. */ | |
2968 | ttrans = ansiexpand (nestret, 0, nestlen - 1, &ttranslen); | |
f73dda09 | 2969 | xfree (nestret); |
c3271763 | 2970 | |
7790f917 CR |
2971 | if ((rflags & P_DQUOTE) == 0) |
2972 | { | |
2973 | nestret = sh_single_quote (ttrans); | |
2974 | free (ttrans); | |
2975 | nestlen = strlen (nestret); | |
2976 | } | |
2977 | else | |
2978 | { | |
2979 | nestret = ttrans; | |
2980 | nestlen = ttranslen; | |
2981 | } | |
28ef6c31 JA |
2982 | retind -= 2; /* back up before the $' */ |
2983 | } | |
ed35cb4a | 2984 | else if MBTEST((tflags & LEX_WASDOL) && ch == '"' && (extended_quote || (rflags & P_DQUOTE) == 0)) |
28ef6c31 JA |
2985 | { |
2986 | /* Locale expand $"..." here. */ | |
2987 | ttrans = localeexpand (nestret, 0, nestlen - 1, start_lineno, &ttranslen); | |
f73dda09 | 2988 | xfree (nestret); |
c3271763 CR |
2989 | |
2990 | nestret = sh_mkdoublequoted (ttrans, ttranslen, 0); | |
28ef6c31 | 2991 | free (ttrans); |
c3271763 | 2992 | nestlen = ttranslen + 2; |
28ef6c31 JA |
2993 | retind -= 2; /* back up before the $" */ |
2994 | } | |
7117c2d2 | 2995 | |
ed35cb4a | 2996 | APPEND_NESTRET (); |
ccc6cda3 JA |
2997 | FREE (nestret); |
2998 | } | |
2999 | } | |
3000 | /* Parse an old-style command substitution within double quotes as a | |
3001 | single word. */ | |
3002 | /* XXX - sh and ksh93 don't do this - XXX */ | |
7117c2d2 | 3003 | else if MBTEST(open == '"' && ch == '`') |
ccc6cda3 | 3004 | { |
d3a24ed2 | 3005 | nestret = parse_matched_pair (0, '`', '`', &nestlen, rflags); |
ed35cb4a CR |
3006 | |
3007 | CHECK_NESTRET_ERROR (); | |
3008 | APPEND_NESTRET (); | |
3009 | ||
3010 | FREE (nestret); | |
3011 | } | |
3012 | else if MBTEST(open != '`' && (tflags & LEX_WASDOL) && (ch == '(' || ch == '{' || ch == '[')) /* ) } ] */ | |
3013 | /* check for $(), $[], or ${} inside quoted string. */ | |
3014 | { | |
3015 | if (open == ch) /* undo previous increment */ | |
3016 | count--; | |
3017 | if (ch == '(') /* ) */ | |
3018 | nestret = parse_matched_pair (0, '(', ')', &nestlen, rflags & ~P_DQUOTE); | |
3019 | else if (ch == '{') /* } */ | |
3020 | nestret = parse_matched_pair (0, '{', '}', &nestlen, P_FIRSTCLOSE|rflags); | |
3021 | else if (ch == '[') /* ] */ | |
3022 | nestret = parse_matched_pair (0, '[', ']', &nestlen, rflags); | |
3023 | ||
3024 | CHECK_NESTRET_ERROR (); | |
3025 | APPEND_NESTRET (); | |
3026 | ||
3027 | FREE (nestret); | |
3028 | } | |
3029 | if MBTEST(ch == '$') | |
3030 | tflags |= LEX_WASDOL; | |
3031 | else | |
3032 | tflags &= ~LEX_WASDOL; | |
3033 | } | |
3034 | ||
3035 | ret[retind] = '\0'; | |
3036 | if (lenp) | |
3037 | *lenp = retind; | |
3038 | return ret; | |
3039 | } | |
3040 | ||
3041 | /* Parse a $(...) command substitution. This is messier than I'd like, and | |
3042 | reproduces a lot more of the token-reading code than I'd like. */ | |
3043 | static char * | |
3044 | parse_comsub (qc, open, close, lenp, flags) | |
3045 | int qc; /* `"' if this construct is within double quotes */ | |
3046 | int open, close; | |
3047 | int *lenp, flags; | |
3048 | { | |
3049 | int count, ch, peekc, tflags, lex_rwlen, lex_firstind; | |
3050 | int nestlen, ttranslen, start_lineno; | |
3051 | char *ret, *nestret, *ttrans, *heredelim; | |
3052 | int retind, retsize, rflags, hdlen; | |
3053 | ||
3054 | /*itrace("parse_comsub: qc = `%c' open = %c close = %c", qc, open, close);*/ | |
3055 | count = 1; | |
3056 | tflags = LEX_RESWDOK; | |
3057 | ||
3058 | if ((flags & P_COMMAND) && qc != '\'' && qc != '"' && (flags & P_DQUOTE) == 0) | |
3059 | tflags |= LEX_CKCASE; | |
3060 | if ((tflags & LEX_CKCASE) && (interactive == 0 || interactive_comments)) | |
3061 | tflags |= LEX_CKCOMMENT; | |
3062 | ||
3063 | /* RFLAGS is the set of flags we want to pass to recursive calls. */ | |
3064 | rflags = (flags & P_DQUOTE); | |
3065 | ||
3066 | ret = (char *)xmalloc (retsize = 64); | |
3067 | retind = 0; | |
3068 | ||
3069 | start_lineno = line_number; | |
3070 | lex_rwlen = 0; | |
3071 | ||
3072 | heredelim = 0; | |
3073 | lex_firstind = -1; | |
3074 | ||
3075 | while (count) | |
3076 | { | |
3077 | comsub_readchar: | |
3078 | ch = shell_getc (qc != '\'' && (tflags & LEX_PASSNEXT) == 0); | |
3079 | ||
3080 | if (ch == EOF) | |
3081 | { | |
3082 | eof_error: | |
3083 | free (ret); | |
3084 | FREE (heredelim); | |
3085 | parser_error (start_lineno, _("unexpected EOF while looking for matching `%c'"), close); | |
3086 | EOF_Reached = 1; /* XXX */ | |
3087 | return (&matched_pair_error); | |
3088 | } | |
3089 | ||
3090 | /* If we hit the end of a line and are reading the contents of a here | |
3091 | document, and it's not the same line that the document starts on, | |
3092 | check for this line being the here doc delimiter. Otherwise, if | |
3093 | we're in a here document, mark the next character as the beginning | |
3094 | of a line. */ | |
3095 | if (ch == '\n') | |
3096 | { | |
3097 | if ((tflags & LEX_HEREDELIM) && heredelim) | |
ccc6cda3 | 3098 | { |
ed35cb4a CR |
3099 | tflags &= ~LEX_HEREDELIM; |
3100 | tflags |= LEX_INHEREDOC; | |
3101 | lex_firstind = retind + 1; | |
ccc6cda3 | 3102 | } |
ed35cb4a | 3103 | else if (tflags & LEX_INHEREDOC) |
ccc6cda3 | 3104 | { |
ed35cb4a CR |
3105 | int tind; |
3106 | tind = lex_firstind; | |
3107 | while ((tflags & LEX_STRIPDOC) && ret[tind] == '\t') | |
3108 | tind++; | |
3109 | if (STREQN (ret + tind, heredelim, hdlen)) | |
3110 | { | |
3111 | tflags &= ~(LEX_STRIPDOC|LEX_INHEREDOC); | |
3112 | /*itrace("parse_comsub:%d: found here doc end `%s'", line_number, ret + tind);*/ | |
3113 | lex_firstind = -1; | |
3114 | } | |
3115 | else | |
3116 | lex_firstind = retind + 1; | |
ccc6cda3 | 3117 | } |
ccc6cda3 | 3118 | } |
ed35cb4a CR |
3119 | |
3120 | /* Possible reprompting. */ | |
3121 | if (ch == '\n' && SHOULD_PROMPT ()) | |
3122 | prompt_again (); | |
3123 | ||
3124 | /* Don't bother counting parens or doing anything else if in a comment */ | |
3125 | if (tflags & (LEX_INCOMMENT|LEX_INHEREDOC)) | |
3126 | { | |
3127 | /* Add this character. */ | |
3128 | RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64); | |
3129 | ret[retind++] = ch; | |
3130 | ||
3131 | if ((tflags & LEX_INCOMMENT) && ch == '\n') | |
3132 | tflags &= ~LEX_INCOMMENT; | |
3133 | ||
3134 | continue; | |
3135 | } | |
3136 | ||
3137 | /* Skip whitespace */ | |
3138 | if MBTEST(shellblank (ch) && lex_rwlen == 0) | |
3139 | { | |
3140 | /* Add this character. */ | |
3141 | RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64); | |
3142 | ret[retind++] = ch; | |
3143 | continue; | |
3144 | } | |
3145 | ||
3146 | /* Either we are looking for the start of the here-doc delimiter | |
3147 | (lex_firstind == -1) or we are reading one (lex_firstind >= 0). | |
3148 | If this character is a shell break character and we are reading | |
3149 | the delimiter, save it and note that we are now reading a here | |
3150 | document. If we've found the start of the delimiter, note it by | |
3151 | setting lex_firstind. Backslashes can quote shell metacharacters | |
3152 | in here-doc delimiters. */ | |
3153 | if (tflags & LEX_HEREDELIM) | |
3154 | { | |
3155 | if (lex_firstind == -1 && shellbreak (ch) == 0) | |
3156 | lex_firstind = retind; | |
3157 | else if (lex_firstind >= 0 && (tflags & LEX_PASSNEXT) == 0 && shellbreak (ch)) | |
3158 | { | |
3159 | nestret = substring (ret, lex_firstind, retind); | |
3160 | heredelim = string_quote_removal (nestret, 0); | |
3161 | free (nestret); | |
3162 | hdlen = STRLEN(heredelim); | |
3163 | /*itrace("parse_comsub:%d: found here doc delimiter `%s' (%d)", line_number, heredelim, hdlen);*/ | |
3164 | if (ch == '\n') | |
3165 | { | |
3166 | tflags |= LEX_INHEREDOC; | |
3167 | tflags &= ~LEX_HEREDELIM; | |
3168 | lex_firstind = retind + 1; | |
3169 | } | |
3170 | else | |
3171 | lex_firstind = -1; | |
3172 | } | |
3173 | } | |
3174 | ||
3175 | /* Meta-characters that can introduce a reserved word. Not perfect yet. */ | |
3176 | if MBTEST((tflags & LEX_RESWDOK) == 0 && (tflags & LEX_CKCASE) && (tflags & LEX_INCOMMENT) == 0 && shellmeta(ch)) | |
3177 | { | |
3178 | /* Add this character. */ | |
3179 | RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64); | |
3180 | ret[retind++] = ch; | |
3181 | peekc = shell_getc (1); | |
3182 | if (ch == peekc && (ch == '&' || ch == '|' || ch == ';')) /* two-character tokens */ | |
3183 | { | |
3184 | RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64); | |
3185 | ret[retind++] = peekc; | |
3186 | /*itrace("parse_comsub:%d: set lex_reswordok = 1, ch = `%c'", line_number, ch); */ | |
3187 | tflags |= LEX_RESWDOK; | |
3188 | lex_rwlen = 0; | |
3189 | continue; | |
3190 | } | |
3191 | else if (ch == '\n' || COMSUB_META(ch)) | |
3192 | { | |
3193 | shell_ungetc (peekc); | |
3194 | tflags |= LEX_RESWDOK; | |
3195 | /*itrace("parse_comsub:%d: set lex_reswordok = 1, ch = `%c'", line_number, ch);*/ | |
3196 | lex_rwlen = 0; | |
3197 | continue; | |
3198 | } | |
3199 | else if (ch == EOF) | |
3200 | goto eof_error; | |
3201 | else | |
3202 | { | |
3203 | /* `unget' the character we just added and fall through */ | |
3204 | retind--; | |
3205 | shell_ungetc (peekc); | |
3206 | } | |
3207 | } | |
3208 | ||
3209 | /* If we can read a reserved word, try to read one. */ | |
3210 | if (tflags & LEX_RESWDOK) | |
3211 | { | |
3212 | if MBTEST(islower (ch)) | |
3213 | { | |
3214 | /* Add this character. */ | |
3215 | RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64); | |
3216 | ret[retind++] = ch; | |
3217 | lex_rwlen++; | |
3218 | continue; | |
3219 | } | |
3220 | else if MBTEST(lex_rwlen == 4 && shellbreak (ch)) | |
3221 | { | |
3222 | if (STREQN (ret + retind - 4, "case", 4)) | |
3223 | { | |
3224 | tflags |= LEX_INCASE; | |
3225 | /*itrace("parse_comsub:%d: found `case', lex_incase -> 1", line_number);*/ | |
3226 | } | |
3227 | else if (STREQN (ret + retind - 4, "esac", 4)) | |
3228 | { | |
3229 | tflags &= ~LEX_INCASE; | |
3230 | /*itrace("parse_comsub:%d: found `esac', lex_incase -> 0", line_number);*/ | |
3231 | } | |
3232 | tflags &= ~LEX_RESWDOK; | |
3233 | } | |
3234 | else if (shellbreak (ch) == 0) | |
3235 | { | |
3236 | tflags &= ~LEX_RESWDOK; | |
3237 | /*itrace("parse_comsub:%d: found `%c', lex_reswordok -> 0", line_number, ch);*/ | |
3238 | } | |
3239 | } | |
3240 | ||
3241 | if MBTEST((tflags & LEX_INCOMMENT) == 0 && (tflags & LEX_CKCASE) && ch == '<') | |
3242 | { | |
3243 | /* Add this character. */ | |
3244 | RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64); | |
3245 | ret[retind++] = ch; | |
3246 | peekc = shell_getc (1); | |
3247 | if (peekc == EOF) | |
3248 | goto eof_error; | |
3249 | if (peekc == ch) | |
3250 | { | |
3251 | RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64); | |
3252 | ret[retind++] = peekc; | |
3253 | peekc = shell_getc (1); | |
3254 | if (peekc == EOF) | |
3255 | goto eof_error; | |
3256 | if (peekc == '-') | |
3257 | { | |
3258 | RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64); | |
3259 | ret[retind++] = peekc; | |
3260 | tflags |= LEX_STRIPDOC; | |
3261 | } | |
3262 | else | |
3263 | shell_ungetc (peekc); | |
3264 | tflags |= LEX_HEREDELIM; | |
3265 | lex_firstind = -1; | |
3266 | continue; | |
3267 | } | |
3268 | else | |
3269 | ch = peekc; /* fall through and continue XXX - this skips comments if peekc == '#' */ | |
3270 | } | |
3271 | /* Not exactly right yet, should handle shell metacharacters, too. If | |
3272 | any changes are made to this test, make analogous changes to subst.c: | |
3273 | extract_delimited_string(). */ | |
3274 | else if MBTEST((tflags & LEX_CKCOMMENT) && (tflags & LEX_INCOMMENT) == 0 && ch == '#' && (retind == 0 || ret[retind-1] == '\n' || shellblank (ret[retind - 1]))) | |
3275 | tflags |= LEX_INCOMMENT; | |
3276 | ||
3277 | if (tflags & LEX_PASSNEXT) /* last char was backslash */ | |
3278 | { | |
3279 | tflags &= ~LEX_PASSNEXT; | |
3280 | if (qc != '\'' && ch == '\n') /* double-quoted \<newline> disappears. */ | |
3281 | { | |
3282 | if (retind > 0) | |
3283 | retind--; /* swallow previously-added backslash */ | |
3284 | continue; | |
3285 | } | |
3286 | ||
3287 | RESIZE_MALLOCED_BUFFER (ret, retind, 2, retsize, 64); | |
3288 | if MBTEST(ch == CTLESC || ch == CTLNUL) | |
3289 | ret[retind++] = CTLESC; | |
3290 | ret[retind++] = ch; | |
3291 | continue; | |
3292 | } | |
3293 | else if MBTEST(ch == CTLESC || ch == CTLNUL) /* special shell escapes */ | |
fd3925f1 | 3294 | { |
ed35cb4a CR |
3295 | RESIZE_MALLOCED_BUFFER (ret, retind, 2, retsize, 64); |
3296 | ret[retind++] = CTLESC; | |
3297 | ret[retind++] = ch; | |
3298 | continue; | |
fd3925f1 | 3299 | } |
ed35cb4a CR |
3300 | #if 0 |
3301 | else if MBTEST((tflags & LEX_INCASE) && ch == close && close == ')') | |
3302 | tflags &= ~LEX_INCASE; /* XXX */ | |
462a7a25 | 3303 | #endif |
ed35cb4a CR |
3304 | else if MBTEST(ch == close && (tflags & LEX_INCASE) == 0) /* ending delimiter */ |
3305 | { | |
3306 | count--; | |
3307 | /*itrace("parse_comsub:%d: found close: count = %d", line_number, count);*/ | |
3308 | } | |
3309 | else if MBTEST(((flags & P_FIRSTCLOSE) == 0) && (tflags & LEX_INCASE) == 0 && ch == open) /* nested begin */ | |
3310 | count++; | |
3311 | ||
3312 | /* Add this character. */ | |
3313 | RESIZE_MALLOCED_BUFFER (ret, retind, 1, retsize, 64); | |
3314 | ret[retind++] = ch; | |
3315 | ||
3316 | /* If we just read the ending character, don't bother continuing. */ | |
3317 | if (count == 0) | |
3318 | break; | |
3319 | ||
3320 | if MBTEST(ch == '\\') /* backslashes */ | |
3321 | tflags |= LEX_PASSNEXT; | |
3322 | ||
3323 | if MBTEST(shellquote (ch)) | |
3324 | { | |
3325 | /* '', ``, or "" inside $(...). */ | |
3326 | push_delimiter (dstack, ch); | |
3327 | if MBTEST((tflags & LEX_WASDOL) && ch == '\'') /* $'...' inside group */ | |
3328 | nestret = parse_matched_pair (ch, ch, ch, &nestlen, P_ALLOWESC|rflags); | |
3329 | else | |
3330 | nestret = parse_matched_pair (ch, ch, ch, &nestlen, rflags); | |
3331 | pop_delimiter (dstack); | |
3332 | CHECK_NESTRET_ERROR (); | |
3333 | ||
3334 | if MBTEST((tflags & LEX_WASDOL) && ch == '\'' && (extended_quote || (rflags & P_DQUOTE) == 0)) | |
3335 | { | |
3336 | /* Translate $'...' here. */ | |
3337 | ttrans = ansiexpand (nestret, 0, nestlen - 1, &ttranslen); | |
3338 | xfree (nestret); | |
3339 | ||
3340 | if ((rflags & P_DQUOTE) == 0) | |
3341 | { | |
3342 | nestret = sh_single_quote (ttrans); | |
3343 | free (ttrans); | |
3344 | nestlen = strlen (nestret); | |
3345 | } | |
3346 | else | |
3347 | { | |
3348 | nestret = ttrans; | |
3349 | nestlen = ttranslen; | |
3350 | } | |
3351 | retind -= 2; /* back up before the $' */ | |
3352 | } | |
3353 | else if MBTEST((tflags & LEX_WASDOL) && ch == '"' && (extended_quote || (rflags & P_DQUOTE) == 0)) | |
3354 | { | |
3355 | /* Locale expand $"..." here. */ | |
3356 | ttrans = localeexpand (nestret, 0, nestlen - 1, start_lineno, &ttranslen); | |
3357 | xfree (nestret); | |
3358 | ||
3359 | nestret = sh_mkdoublequoted (ttrans, ttranslen, 0); | |
3360 | free (ttrans); | |
3361 | nestlen = ttranslen + 2; | |
3362 | retind -= 2; /* back up before the $" */ | |
3363 | } | |
3364 | ||
3365 | APPEND_NESTRET (); | |
3366 | FREE (nestret); | |
3367 | } | |
3368 | else if MBTEST((tflags & LEX_WASDOL) && (ch == '(' || ch == '{' || ch == '[')) /* ) } ] */ | |
3369 | /* check for $(), $[], or ${} inside command substitution. */ | |
ccc6cda3 | 3370 | { |
ed35cb4a | 3371 | if ((tflags & LEX_INCASE) == 0 && open == ch) /* undo previous increment */ |
ccc6cda3 JA |
3372 | count--; |
3373 | if (ch == '(') /* ) */ | |
ed35cb4a | 3374 | nestret = parse_comsub (0, '(', ')', &nestlen, (rflags|P_COMMAND) & ~P_DQUOTE); |
ccc6cda3 | 3375 | else if (ch == '{') /* } */ |
d3a24ed2 | 3376 | nestret = parse_matched_pair (0, '{', '}', &nestlen, P_FIRSTCLOSE|rflags); |
ccc6cda3 | 3377 | else if (ch == '[') /* ] */ |
d3a24ed2 | 3378 | nestret = parse_matched_pair (0, '[', ']', &nestlen, rflags); |
fd3925f1 | 3379 | |
ed35cb4a CR |
3380 | CHECK_NESTRET_ERROR (); |
3381 | APPEND_NESTRET (); | |
3382 | ||
3383 | FREE (nestret); | |
ccc6cda3 | 3384 | } |
ed35cb4a CR |
3385 | if MBTEST(ch == '$') |
3386 | tflags |= LEX_WASDOL; | |
3387 | else | |
3388 | tflags &= ~LEX_WASDOL; | |
ccc6cda3 | 3389 | } |
726f6388 | 3390 | |
ed35cb4a | 3391 | FREE (heredelim); |
ccc6cda3 JA |
3392 | ret[retind] = '\0'; |
3393 | if (lenp) | |
3394 | *lenp = retind; | |
ed35cb4a CR |
3395 | /*itrace("parse_comsub:%d: returning `%s'", line_number, ret);*/ |
3396 | return ret; | |
3397 | } | |
3398 | ||
3399 | /* XXX - this needs to handle functionality like subst.c:no_longjmp_on_fatal_error; | |
3400 | maybe extract_command_subst should handle it. */ | |
3401 | char * | |
3402 | xparse_dolparen (base, string, indp, flags) | |
3403 | char *base; | |
3404 | char *string; | |
3405 | int *indp; | |
3406 | int flags; | |
3407 | { | |
3408 | sh_parser_state_t ps; | |
3409 | int orig_ind, nc, sflags; | |
3410 | char *ret, *s, *ep, *ostring; | |
3411 | ||
3412 | /*yydebug = 1;*/ | |
3413 | orig_ind = *indp; | |
3414 | ostring = string; | |
3415 | ||
3416 | sflags = SEVAL_NONINT|SEVAL_NOHIST|SEVAL_NOFREE; | |
3417 | if (flags & 0x010) /* EX_NOLONGJMP */ | |
3418 | sflags |= SEVAL_NOLONGJMP; | |
3419 | save_parser_state (&ps); | |
3420 | ||
3421 | /*(*/ | |
3422 | parser_state |= PST_CMDSUBST|PST_EOFTOKEN; /* allow instant ')' */ /*(*/ | |
3423 | shell_eof_token = ')'; | |
3424 | parse_string (string, "command substitution", sflags, &ep); | |
3425 | ||
3426 | restore_parser_state (&ps); | |
3427 | reset_parser (); | |
3428 | if (interactive) | |
3429 | token_to_read = 0; | |
3430 | ||
3431 | /* Need to find how many characters parse_and_execute consumed, update | |
3432 | *indp, if flags != 0, copy the portion of the string parsed into RET | |
3433 | and return it. If flags & 1 (EX_NOALLOC) we can return NULL. */ | |
3434 | ||
3435 | /*(*/ | |
3436 | if (ep[-1] != ')') | |
3437 | { | |
3438 | #if DEBUG | |
3439 | itrace("xparse_dolparen:%d: ep[-1] != RPAREN (%d), ep = `%s'", line_number, ep[-1], ep); | |
3440 | #endif | |
3441 | while (ep > ostring && ep[-1] == '\n') ep--; | |
3442 | } | |
3443 | ||
3444 | nc = ep - ostring; | |
3445 | *indp = ep - base - 1; | |
3446 | ||
3447 | /*(*/ | |
3448 | #if DEBUG | |
3449 | if (base[*indp] != ')') | |
3450 | itrace("xparse_dolparen:%d: base[%d] != RPAREN (%d), base = `%s'", line_number, *indp, base[*indp], base); | |
3451 | #endif | |
3452 | ||
3453 | if (flags & 1) | |
3454 | return (char *)NULL; | |
3455 | ||
3456 | if (nc == 0) | |
3457 | { | |
3458 | ret = xmalloc (1); | |
3459 | ret[0] = '\0'; | |
3460 | } | |
3461 | else | |
3462 | ret = substring (ostring, 0, nc - 1); | |
3463 | ||
ccc6cda3 JA |
3464 | return ret; |
3465 | } | |
726f6388 | 3466 | |
bb70624e | 3467 | #if defined (DPAREN_ARITHMETIC) || defined (ARITH_FOR_COMMAND) |
7117c2d2 JA |
3468 | /* Parse a double-paren construct. It can be either an arithmetic |
3469 | command, an arithmetic `for' command, or a nested subshell. Returns | |
3470 | the parsed token, -1 on error, or -2 if we didn't do anything and | |
3471 | should just go on. */ | |
3472 | static int | |
3473 | parse_dparen (c) | |
3474 | int c; | |
3475 | { | |
d3ad40de CR |
3476 | int cmdtyp, sline; |
3477 | char *wval; | |
7117c2d2 JA |
3478 | WORD_DESC *wd; |
3479 | ||
3480 | #if defined (ARITH_FOR_COMMAND) | |
3481 | if (last_read_token == FOR) | |
3482 | { | |
3483 | arith_for_lineno = line_number; | |
d3a24ed2 | 3484 | cmdtyp = parse_arith_cmd (&wval, 0); |
7117c2d2 JA |
3485 | if (cmdtyp == 1) |
3486 | { | |
227f982e CR |
3487 | wd = alloc_word_desc (); |
3488 | wd->word = wval; | |
7117c2d2 | 3489 | yylval.word_list = make_word_list (wd, (WORD_LIST *)NULL); |
7117c2d2 JA |
3490 | return (ARITH_FOR_EXPRS); |
3491 | } | |
3492 | else | |
3493 | return -1; /* ERROR */ | |
3494 | } | |
3495 | #endif | |
3496 | ||
3497 | #if defined (DPAREN_ARITHMETIC) | |
3498 | if (reserved_word_acceptable (last_read_token)) | |
3499 | { | |
3500 | sline = line_number; | |
c3271763 | 3501 | |
d3a24ed2 | 3502 | cmdtyp = parse_arith_cmd (&wval, 0); |
7117c2d2 JA |
3503 | if (cmdtyp == 1) /* arithmetic command */ |
3504 | { | |
227f982e CR |
3505 | wd = alloc_word_desc (); |
3506 | wd->word = wval; | |
da719982 | 3507 | wd->flags = W_QUOTED|W_NOSPLIT|W_NOGLOB|W_DQUOTE; |
7117c2d2 | 3508 | yylval.word_list = make_word_list (wd, (WORD_LIST *)NULL); |
7117c2d2 JA |
3509 | return (ARITH_CMD); |
3510 | } | |
3511 | else if (cmdtyp == 0) /* nested subshell */ | |
3512 | { | |
3513 | push_string (wval, 0, (alias_t *)NULL); | |
3514 | if ((parser_state & PST_CASEPAT) == 0) | |
3515 | parser_state |= PST_SUBSHELL; | |
3516 | return (c); | |
3517 | } | |
3518 | else /* ERROR */ | |
3519 | return -1; | |
3520 | } | |
3521 | #endif | |
3522 | ||
3523 | return -2; /* XXX */ | |
3524 | } | |
3525 | ||
d166f048 JA |
3526 | /* We've seen a `(('. Look for the matching `))'. If we get it, return 1. |
3527 | If not, assume it's a nested subshell for backwards compatibility and | |
3528 | return 0. In any case, put the characters we've consumed into a locally- | |
3529 | allocated buffer and make *ep point to that buffer. Return -1 on an | |
3530 | error, for example EOF. */ | |
3531 | static int | |
d3a24ed2 | 3532 | parse_arith_cmd (ep, adddq) |
d166f048 | 3533 | char **ep; |
d3a24ed2 | 3534 | int adddq; |
d166f048 JA |
3535 | { |
3536 | int exp_lineno, rval, c; | |
f73dda09 | 3537 | char *ttok, *tokstr; |
d166f048 JA |
3538 | int ttoklen; |
3539 | ||
3540 | exp_lineno = line_number; | |
3541 | ttok = parse_matched_pair (0, '(', ')', &ttoklen, 0); | |
3542 | rval = 1; | |
3543 | if (ttok == &matched_pair_error) | |
3544 | return -1; | |
3545 | /* Check that the next character is the closing right paren. If | |
3546 | not, this is a syntax error. ( */ | |
7117c2d2 JA |
3547 | c = shell_getc (0); |
3548 | if MBTEST(c != ')') | |
d166f048 JA |
3549 | rval = 0; |
3550 | ||
f73dda09 | 3551 | tokstr = (char *)xmalloc (ttoklen + 4); |
d166f048 | 3552 | |
d3a24ed2 CR |
3553 | /* if ADDDQ != 0 then (( ... )) -> "..." */ |
3554 | if (rval == 1 && adddq) /* arith cmd, add double quotes */ | |
d166f048 | 3555 | { |
d3a24ed2 CR |
3556 | tokstr[0] = '"'; |
3557 | strncpy (tokstr + 1, ttok, ttoklen - 1); | |
f73dda09 JA |
3558 | tokstr[ttoklen] = '"'; |
3559 | tokstr[ttoklen+1] = '\0'; | |
d166f048 | 3560 | } |
d3a24ed2 | 3561 | else if (rval == 1) /* arith cmd, don't add double quotes */ |
d166f048 | 3562 | { |
d3a24ed2 CR |
3563 | strncpy (tokstr, ttok, ttoklen - 1); |
3564 | tokstr[ttoklen-1] = '\0'; | |
3565 | } | |
3566 | else /* nested subshell */ | |
3567 | { | |
3568 | tokstr[0] = '('; | |
3569 | strncpy (tokstr + 1, ttok, ttoklen - 1); | |
f73dda09 JA |
3570 | tokstr[ttoklen] = ')'; |
3571 | tokstr[ttoklen+1] = c; | |
3572 | tokstr[ttoklen+2] = '\0'; | |
d166f048 | 3573 | } |
d3a24ed2 | 3574 | |
f73dda09 | 3575 | *ep = tokstr; |
d166f048 JA |
3576 | FREE (ttok); |
3577 | return rval; | |
3578 | } | |
bb70624e | 3579 | #endif /* DPAREN_ARITHMETIC || ARITH_FOR_COMMAND */ |
d166f048 | 3580 | |
cce855bc | 3581 | #if defined (COND_COMMAND) |
7117c2d2 JA |
3582 | static void |
3583 | cond_error () | |
3584 | { | |
3585 | char *etext; | |
3586 | ||
3587 | if (EOF_Reached && cond_token != COND_ERROR) /* [[ */ | |
5e13499c | 3588 | parser_error (cond_lineno, _("unexpected EOF while looking for `]]'")); |
7117c2d2 JA |
3589 | else if (cond_token != COND_ERROR) |
3590 | { | |
3591 | if (etext = error_token_from_token (cond_token)) | |
3592 | { | |
5e13499c | 3593 | parser_error (cond_lineno, _("syntax error in conditional expression: unexpected token `%s'"), etext); |
7117c2d2 JA |
3594 | free (etext); |
3595 | } | |
3596 | else | |
5e13499c | 3597 | parser_error (cond_lineno, _("syntax error in conditional expression")); |
7117c2d2 JA |
3598 | } |
3599 | } | |
3600 | ||
cce855bc JA |
3601 | static COND_COM * |
3602 | cond_expr () | |
3603 | { | |
3604 | return (cond_or ()); | |
3605 | } | |
3606 | ||
3607 | static COND_COM * | |
3608 | cond_or () | |
3609 | { | |
3610 | COND_COM *l, *r; | |
3611 | ||
3612 | l = cond_and (); | |
3613 | if (cond_token == OR_OR) | |
3614 | { | |
3615 | r = cond_or (); | |
3616 | l = make_cond_node (COND_OR, (WORD_DESC *)NULL, l, r); | |
3617 | } | |
3618 | return l; | |
3619 | } | |
3620 | ||
3621 | static COND_COM * | |
3622 | cond_and () | |
3623 | { | |
3624 | COND_COM *l, *r; | |
3625 | ||
3626 | l = cond_term (); | |
3627 | if (cond_token == AND_AND) | |
3628 | { | |
3629 | r = cond_and (); | |
3630 | l = make_cond_node (COND_AND, (WORD_DESC *)NULL, l, r); | |
3631 | } | |
3632 | return l; | |
3633 | } | |
3634 | ||
3635 | static int | |
3636 | cond_skip_newlines () | |
3637 | { | |
3638 | while ((cond_token = read_token (READ)) == '\n') | |
3639 | { | |
d3a24ed2 | 3640 | if (SHOULD_PROMPT ()) |
cce855bc JA |
3641 | prompt_again (); |
3642 | } | |
3643 | return (cond_token); | |
3644 | } | |
3645 | ||
3646 | #define COND_RETURN_ERROR() \ | |
3647 | do { cond_token = COND_ERROR; return ((COND_COM *)NULL); } while (0) | |
3648 | ||
3649 | static COND_COM * | |
3650 | cond_term () | |
3651 | { | |
3652 | WORD_DESC *op; | |
3653 | COND_COM *term, *tleft, *tright; | |
3654 | int tok, lineno; | |
7117c2d2 | 3655 | char *etext; |
cce855bc JA |
3656 | |
3657 | /* Read a token. It can be a left paren, a `!', a unary operator, or a | |
3658 | word that should be the first argument of a binary operator. Start by | |
3659 | skipping newlines, since this is a compound command. */ | |
3660 | tok = cond_skip_newlines (); | |
3661 | lineno = line_number; | |
3662 | if (tok == COND_END) | |
3663 | { | |
3664 | COND_RETURN_ERROR (); | |
3665 | } | |
3666 | else if (tok == '(') | |
3667 | { | |
3668 | term = cond_expr (); | |
3669 | if (cond_token != ')') | |
3670 | { | |
3671 | if (term) | |
3672 | dispose_cond_node (term); /* ( */ | |
7117c2d2 JA |
3673 | if (etext = error_token_from_token (cond_token)) |
3674 | { | |
5e13499c | 3675 | parser_error (lineno, _("unexpected token `%s', expected `)'"), etext); |
7117c2d2 JA |
3676 | free (etext); |
3677 | } | |
3678 | else | |
5e13499c | 3679 | parser_error (lineno, _("expected `)'")); |
cce855bc JA |
3680 | COND_RETURN_ERROR (); |
3681 | } | |
3682 | term = make_cond_node (COND_EXPR, (WORD_DESC *)NULL, term, (COND_COM *)NULL); | |
3683 | (void)cond_skip_newlines (); | |
3684 | } | |
3685 | else if (tok == BANG || (tok == WORD && (yylval.word->word[0] == '!' && yylval.word->word[1] == '\0'))) | |
3686 | { | |
3687 | if (tok == WORD) | |
3688 | dispose_word (yylval.word); /* not needed */ | |
3689 | term = cond_term (); | |
3690 | if (term) | |
3691 | term->flags |= CMD_INVERT_RETURN; | |
3692 | } | |
7a131ef2 | 3693 | else if (tok == WORD && yylval.word->word[0] == '-' && yylval.word->word[2] == 0 && test_unop (yylval.word->word)) |
cce855bc JA |
3694 | { |
3695 | op = yylval.word; | |
3696 | tok = read_token (READ); | |
3697 | if (tok == WORD) | |
3698 | { | |
3699 | tleft = make_cond_node (COND_TERM, yylval.word, (COND_COM *)NULL, (COND_COM *)NULL); | |
3700 | term = make_cond_node (COND_UNARY, op, tleft, (COND_COM *)NULL); | |
3701 | } | |
3702 | else | |
3703 | { | |
3704 | dispose_word (op); | |
7117c2d2 JA |
3705 | if (etext = error_token_from_token (tok)) |
3706 | { | |
5e13499c | 3707 | parser_error (line_number, _("unexpected argument `%s' to conditional unary operator"), etext); |
7117c2d2 JA |
3708 | free (etext); |
3709 | } | |
3710 | else | |
5e13499c | 3711 | parser_error (line_number, _("unexpected argument to conditional unary operator")); |
cce855bc JA |
3712 | COND_RETURN_ERROR (); |
3713 | } | |
3714 | ||
3715 | (void)cond_skip_newlines (); | |
3716 | } | |
bb70624e | 3717 | else if (tok == WORD) /* left argument to binary operator */ |
cce855bc JA |
3718 | { |
3719 | /* lhs */ | |
3720 | tleft = make_cond_node (COND_TERM, yylval.word, (COND_COM *)NULL, (COND_COM *)NULL); | |
3721 | ||
3722 | /* binop */ | |
3723 | tok = read_token (READ); | |
3724 | if (tok == WORD && test_binop (yylval.word->word)) | |
28ef6c31 | 3725 | op = yylval.word; |
d3a24ed2 | 3726 | #if defined (COND_REGEXP) |
d3ad40de CR |
3727 | else if (tok == WORD && STREQ (yylval.word->word, "=~")) |
3728 | { | |
3729 | op = yylval.word; | |
3730 | parser_state |= PST_REGEXP; | |
3731 | } | |
d3a24ed2 | 3732 | #endif |
cce855bc | 3733 | else if (tok == '<' || tok == '>') |
28ef6c31 JA |
3734 | op = make_word_from_token (tok); /* ( */ |
3735 | /* There should be a check before blindly accepting the `)' that we have | |
3736 | seen the opening `('. */ | |
3737 | else if (tok == COND_END || tok == AND_AND || tok == OR_OR || tok == ')') | |
cce855bc JA |
3738 | { |
3739 | /* Special case. [[ x ]] is equivalent to [[ -n x ]], just like | |
3740 | the test command. Similarly for [[ x && expr ]] or | |
28ef6c31 | 3741 | [[ x || expr ]] or [[ (x) ]]. */ |
cce855bc JA |
3742 | op = make_word ("-n"); |
3743 | term = make_cond_node (COND_UNARY, op, tleft, (COND_COM *)NULL); | |
3744 | cond_token = tok; | |
3745 | return (term); | |
3746 | } | |
3747 | else | |
3748 | { | |
7117c2d2 JA |
3749 | if (etext = error_token_from_token (tok)) |
3750 | { | |
5e13499c | 3751 | parser_error (line_number, _("unexpected token `%s', conditional binary operator expected"), etext); |
7117c2d2 JA |
3752 | free (etext); |
3753 | } | |
3754 | else | |
5e13499c | 3755 | parser_error (line_number, _("conditional binary operator expected")); |
cce855bc JA |
3756 | dispose_cond_node (tleft); |
3757 | COND_RETURN_ERROR (); | |
3758 | } | |
3759 | ||
3760 | /* rhs */ | |
3761 | tok = read_token (READ); | |
d3ad40de | 3762 | parser_state &= ~PST_REGEXP; |
cce855bc JA |
3763 | if (tok == WORD) |
3764 | { | |
3765 | tright = make_cond_node (COND_TERM, yylval.word, (COND_COM *)NULL, (COND_COM *)NULL); | |
3766 | term = make_cond_node (COND_BINARY, op, tleft, tright); | |
3767 | } | |
3768 | else | |
3769 | { | |
7117c2d2 JA |
3770 | if (etext = error_token_from_token (tok)) |
3771 | { | |
5e13499c | 3772 | parser_error (line_number, _("unexpected argument `%s' to conditional binary operator"), etext); |
7117c2d2 JA |
3773 | free (etext); |
3774 | } | |
3775 | else | |
5e13499c | 3776 | parser_error (line_number, _("unexpected argument to conditional binary operator")); |
cce855bc JA |
3777 | dispose_cond_node (tleft); |
3778 | dispose_word (op); | |
3779 | COND_RETURN_ERROR (); | |
3780 | } | |
3781 | ||
3782 | (void)cond_skip_newlines (); | |
3783 | } | |
bb70624e JA |
3784 | else |
3785 | { | |
3786 | if (tok < 256) | |
5e13499c | 3787 | parser_error (line_number, _("unexpected token `%c' in conditional command"), tok); |
7117c2d2 JA |
3788 | else if (etext = error_token_from_token (tok)) |
3789 | { | |
5e13499c | 3790 | parser_error (line_number, _("unexpected token `%s' in conditional command"), etext); |
7117c2d2 JA |
3791 | free (etext); |
3792 | } | |
bb70624e | 3793 | else |
5e13499c | 3794 | parser_error (line_number, _("unexpected token %d in conditional command"), tok); |
bb70624e JA |
3795 | COND_RETURN_ERROR (); |
3796 | } | |
cce855bc JA |
3797 | return (term); |
3798 | } | |
3799 | ||
3800 | /* This is kind of bogus -- we slip a mini recursive-descent parser in | |
3801 | here to handle the conditional statement syntax. */ | |
3802 | static COMMAND * | |
3803 | parse_cond_command () | |
3804 | { | |
3805 | COND_COM *cexp; | |
3806 | ||
3807 | cexp = cond_expr (); | |
3808 | return (make_cond_command (cexp)); | |
3809 | } | |
3810 | #endif | |
3811 | ||
7117c2d2 JA |
3812 | #if defined (ARRAY_VARS) |
3813 | /* When this is called, it's guaranteed that we don't care about anything | |
3814 | in t beyond i. We do save and restore the chars, though. */ | |
3815 | static int | |
3816 | token_is_assignment (t, i) | |
3817 | char *t; | |
3818 | int i; | |
3819 | { | |
3820 | unsigned char c, c1; | |
3821 | int r; | |
3822 | ||
3823 | c = t[i]; c1 = t[i+1]; | |
3824 | t[i] = '='; t[i+1] = '\0'; | |
5e13499c | 3825 | r = assignment (t, (parser_state & PST_COMPASSIGN) != 0); |
7117c2d2 JA |
3826 | t[i] = c; t[i+1] = c1; |
3827 | return r; | |
3828 | } | |
3829 | ||
d11b8b46 | 3830 | /* XXX - possible changes here for `+=' */ |
7117c2d2 JA |
3831 | static int |
3832 | token_is_ident (t, i) | |
3833 | char *t; | |
3834 | int i; | |
3835 | { | |
3836 | unsigned char c; | |
3837 | int r; | |
3838 | ||
3839 | c = t[i]; | |
3840 | t[i] = '\0'; | |
3841 | r = legal_identifier (t); | |
3842 | t[i] = c; | |
3843 | return r; | |
3844 | } | |
3845 | #endif | |
3846 | ||
ccc6cda3 JA |
3847 | static int |
3848 | read_token_word (character) | |
3849 | int character; | |
3850 | { | |
3851 | /* The value for YYLVAL when a WORD is read. */ | |
3852 | WORD_DESC *the_word; | |
726f6388 | 3853 | |
ccc6cda3 JA |
3854 | /* Index into the token that we are building. */ |
3855 | int token_index; | |
726f6388 | 3856 | |
ccc6cda3 | 3857 | /* ALL_DIGITS becomes zero when we see a non-digit. */ |
f73dda09 | 3858 | int all_digit_token; |
726f6388 | 3859 | |
ccc6cda3 JA |
3860 | /* DOLLAR_PRESENT becomes non-zero if we see a `$'. */ |
3861 | int dollar_present; | |
726f6388 | 3862 | |
43df7bbb CR |
3863 | /* COMPOUND_ASSIGNMENT becomes non-zero if we are parsing a compound |
3864 | assignment. */ | |
3865 | int compound_assignment; | |
3866 | ||
ccc6cda3 JA |
3867 | /* QUOTED becomes non-zero if we see one of ("), ('), (`), or (\). */ |
3868 | int quoted; | |
726f6388 | 3869 | |
ccc6cda3 JA |
3870 | /* Non-zero means to ignore the value of the next character, and just |
3871 | to add it no matter what. */ | |
3872 | int pass_next_character; | |
726f6388 | 3873 | |
ccc6cda3 JA |
3874 | /* The current delimiting character. */ |
3875 | int cd; | |
3876 | int result, peek_char; | |
3877 | char *ttok, *ttrans; | |
3878 | int ttoklen, ttranslen; | |
7117c2d2 | 3879 | intmax_t lvalue; |
726f6388 | 3880 | |
d166f048 | 3881 | if (token_buffer_size < TOKEN_DEFAULT_INITIAL_SIZE) |
f73dda09 | 3882 | token = (char *)xrealloc (token, token_buffer_size = TOKEN_DEFAULT_INITIAL_SIZE); |
726f6388 | 3883 | |
ccc6cda3 | 3884 | token_index = 0; |
f73dda09 | 3885 | all_digit_token = DIGIT (character); |
43df7bbb | 3886 | dollar_present = quoted = pass_next_character = compound_assignment = 0; |
726f6388 | 3887 | |
ccc6cda3 JA |
3888 | for (;;) |
3889 | { | |
3890 | if (character == EOF) | |
3891 | goto got_token; | |
726f6388 | 3892 | |
ccc6cda3 JA |
3893 | if (pass_next_character) |
3894 | { | |
3895 | pass_next_character = 0; | |
d3ad40de | 3896 | goto got_escaped_character; |
ccc6cda3 | 3897 | } |
726f6388 | 3898 | |
ccc6cda3 | 3899 | cd = current_delimiter (dstack); |
726f6388 | 3900 | |
ccc6cda3 JA |
3901 | /* Handle backslashes. Quote lots of things when not inside of |
3902 | double-quotes, quote some things inside of double-quotes. */ | |
7117c2d2 | 3903 | if MBTEST(character == '\\') |
ccc6cda3 JA |
3904 | { |
3905 | peek_char = shell_getc (0); | |
726f6388 | 3906 | |
ccc6cda3 JA |
3907 | /* Backslash-newline is ignored in all cases except |
3908 | when quoted with single quotes. */ | |
3909 | if (peek_char == '\n') | |
3910 | { | |
3911 | character = '\n'; | |
3912 | goto next_character; | |
3913 | } | |
3914 | else | |
3915 | { | |
3916 | shell_ungetc (peek_char); | |
726f6388 | 3917 | |
ccc6cda3 JA |
3918 | /* If the next character is to be quoted, note it now. */ |
3919 | if (cd == 0 || cd == '`' || | |
f73dda09 | 3920 | (cd == '"' && peek_char >= 0 && (sh_syntaxtab[peek_char] & CBSDQUOTE))) |
ccc6cda3 | 3921 | pass_next_character++; |
726f6388 | 3922 | |
ccc6cda3 JA |
3923 | quoted = 1; |
3924 | goto got_character; | |
3925 | } | |
3926 | } | |
726f6388 | 3927 | |
ccc6cda3 | 3928 | /* Parse a matched pair of quote characters. */ |
7117c2d2 | 3929 | if MBTEST(shellquote (character)) |
ccc6cda3 JA |
3930 | { |
3931 | push_delimiter (dstack, character); | |
f6410766 | 3932 | ttok = parse_matched_pair (character, character, character, &ttoklen, (character == '`') ? P_COMMAND : 0); |
ccc6cda3 JA |
3933 | pop_delimiter (dstack); |
3934 | if (ttok == &matched_pair_error) | |
3935 | return -1; /* Bail immediately. */ | |
3936 | RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 2, | |
3937 | token_buffer_size, TOKEN_DEFAULT_GROW_SIZE); | |
3938 | token[token_index++] = character; | |
3939 | strcpy (token + token_index, ttok); | |
3940 | token_index += ttoklen; | |
f73dda09 | 3941 | all_digit_token = 0; |
ccc6cda3 JA |
3942 | quoted = 1; |
3943 | dollar_present |= (character == '"' && strchr (ttok, '$') != 0); | |
3944 | FREE (ttok); | |
3945 | goto next_character; | |
3946 | } | |
726f6388 | 3947 | |
d3ad40de CR |
3948 | #ifdef COND_REGEXP |
3949 | /* When parsing a regexp as a single word inside a conditional command, | |
3950 | we need to special-case characters special to both the shell and | |
3951 | regular expressions. Right now, that is only '(' and '|'. */ /*)*/ | |
3952 | if MBTEST((parser_state & PST_REGEXP) && (character == '(' || character == '|')) /*)*/ | |
3953 | { | |
3954 | if (character == '|') | |
3955 | goto got_character; | |
3956 | ||
3957 | push_delimiter (dstack, character); | |
3958 | ttok = parse_matched_pair (cd, '(', ')', &ttoklen, 0); | |
3959 | pop_delimiter (dstack); | |
3960 | if (ttok == &matched_pair_error) | |
3961 | return -1; /* Bail immediately. */ | |
3962 | RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 2, | |
3963 | token_buffer_size, TOKEN_DEFAULT_GROW_SIZE); | |
3964 | token[token_index++] = character; | |
3965 | strcpy (token + token_index, ttok); | |
3966 | token_index += ttoklen; | |
3967 | FREE (ttok); | |
3968 | dollar_present = all_digit_token = 0; | |
3969 | goto next_character; | |
3970 | } | |
3971 | #endif /* COND_REGEXP */ | |
3972 | ||
cce855bc JA |
3973 | #ifdef EXTENDED_GLOB |
3974 | /* Parse a ksh-style extended pattern matching specification. */ | |
d3ad40de | 3975 | if MBTEST(extended_glob && PATTERN_CHAR (character)) |
cce855bc JA |
3976 | { |
3977 | peek_char = shell_getc (1); | |
7117c2d2 | 3978 | if MBTEST(peek_char == '(') /* ) */ |
cce855bc JA |
3979 | { |
3980 | push_delimiter (dstack, peek_char); | |
3981 | ttok = parse_matched_pair (cd, '(', ')', &ttoklen, 0); | |
3982 | pop_delimiter (dstack); | |
3983 | if (ttok == &matched_pair_error) | |
3984 | return -1; /* Bail immediately. */ | |
3985 | RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 2, | |
3986 | token_buffer_size, | |
3987 | TOKEN_DEFAULT_GROW_SIZE); | |
3988 | token[token_index++] = character; | |
3989 | token[token_index++] = peek_char; | |
3990 | strcpy (token + token_index, ttok); | |
3991 | token_index += ttoklen; | |
3992 | FREE (ttok); | |
f73dda09 | 3993 | dollar_present = all_digit_token = 0; |
cce855bc JA |
3994 | goto next_character; |
3995 | } | |
3996 | else | |
3997 | shell_ungetc (peek_char); | |
3998 | } | |
3999 | #endif /* EXTENDED_GLOB */ | |
4000 | ||
ccc6cda3 JA |
4001 | /* If the delimiter character is not single quote, parse some of |
4002 | the shell expansions that must be read as a single word. */ | |
28ef6c31 | 4003 | if (shellexp (character)) |
ccc6cda3 JA |
4004 | { |
4005 | peek_char = shell_getc (1); | |
4006 | /* $(...), <(...), >(...), $((...)), ${...}, and $[...] constructs */ | |
7117c2d2 | 4007 | if MBTEST(peek_char == '(' || \ |
ccc6cda3 JA |
4008 | ((peek_char == '{' || peek_char == '[') && character == '$')) /* ) ] } */ |
4009 | { | |
4010 | if (peek_char == '{') /* } */ | |
28ef6c31 | 4011 | ttok = parse_matched_pair (cd, '{', '}', &ttoklen, P_FIRSTCLOSE); |
ccc6cda3 | 4012 | else if (peek_char == '(') /* ) */ |
d166f048 JA |
4013 | { |
4014 | /* XXX - push and pop the `(' as a delimiter for use by | |
4015 | the command-oriented-history code. This way newlines | |
4016 | appearing in the $(...) string get added to the | |
4017 | history literally rather than causing a possibly- | |
bb70624e | 4018 | incorrect `;' to be added. ) */ |
d166f048 | 4019 | push_delimiter (dstack, peek_char); |
f6410766 | 4020 | ttok = parse_matched_pair (cd, '(', ')', &ttoklen, P_COMMAND); |
d166f048 JA |
4021 | pop_delimiter (dstack); |
4022 | } | |
ccc6cda3 JA |
4023 | else |
4024 | ttok = parse_matched_pair (cd, '[', ']', &ttoklen, 0); | |
4025 | if (ttok == &matched_pair_error) | |
4026 | return -1; /* Bail immediately. */ | |
4027 | RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 2, | |
4028 | token_buffer_size, | |
4029 | TOKEN_DEFAULT_GROW_SIZE); | |
4030 | token[token_index++] = character; | |
4031 | token[token_index++] = peek_char; | |
4032 | strcpy (token + token_index, ttok); | |
4033 | token_index += ttoklen; | |
4034 | FREE (ttok); | |
4035 | dollar_present = 1; | |
f73dda09 | 4036 | all_digit_token = 0; |
ccc6cda3 JA |
4037 | goto next_character; |
4038 | } | |
4039 | /* This handles $'...' and $"..." new-style quoted strings. */ | |
7117c2d2 | 4040 | else if MBTEST(character == '$' && (peek_char == '\'' || peek_char == '"')) |
ccc6cda3 | 4041 | { |
cce855bc JA |
4042 | int first_line; |
4043 | ||
4044 | first_line = line_number; | |
bb70624e JA |
4045 | push_delimiter (dstack, peek_char); |
4046 | ttok = parse_matched_pair (peek_char, peek_char, peek_char, | |
4047 | &ttoklen, | |
4048 | (peek_char == '\'') ? P_ALLOWESC : 0); | |
4049 | pop_delimiter (dstack); | |
ccc6cda3 JA |
4050 | if (ttok == &matched_pair_error) |
4051 | return -1; | |
4052 | if (peek_char == '\'') | |
bb70624e JA |
4053 | { |
4054 | ttrans = ansiexpand (ttok, 0, ttoklen - 1, &ttranslen); | |
4055 | free (ttok); | |
c3271763 | 4056 | |
bb70624e JA |
4057 | /* Insert the single quotes and correctly quote any |
4058 | embedded single quotes (allowed because P_ALLOWESC was | |
4059 | passed to parse_matched_pair). */ | |
28ef6c31 | 4060 | ttok = sh_single_quote (ttrans); |
bb70624e | 4061 | free (ttrans); |
c3271763 | 4062 | ttranslen = strlen (ttok); |
bb70624e | 4063 | ttrans = ttok; |
bb70624e | 4064 | } |
ccc6cda3 | 4065 | else |
bb70624e | 4066 | { |
b317c077 | 4067 | /* Try to locale-expand the converted string. */ |
bb70624e JA |
4068 | ttrans = localeexpand (ttok, 0, ttoklen - 1, first_line, &ttranslen); |
4069 | free (ttok); | |
4070 | ||
4071 | /* Add the double quotes back */ | |
c3271763 | 4072 | ttok = sh_mkdoublequoted (ttrans, ttranslen, 0); |
bb70624e | 4073 | free (ttrans); |
c3271763 | 4074 | ttranslen += 2; |
bb70624e JA |
4075 | ttrans = ttok; |
4076 | } | |
4077 | ||
ccc6cda3 JA |
4078 | RESIZE_MALLOCED_BUFFER (token, token_index, ttranslen + 2, |
4079 | token_buffer_size, | |
4080 | TOKEN_DEFAULT_GROW_SIZE); | |
ccc6cda3 JA |
4081 | strcpy (token + token_index, ttrans); |
4082 | token_index += ttranslen; | |
ccc6cda3 JA |
4083 | FREE (ttrans); |
4084 | quoted = 1; | |
f73dda09 | 4085 | all_digit_token = 0; |
ccc6cda3 JA |
4086 | goto next_character; |
4087 | } | |
b72432fd JA |
4088 | /* This could eventually be extended to recognize all of the |
4089 | shell's single-character parameter expansions, and set flags.*/ | |
7117c2d2 | 4090 | else if MBTEST(character == '$' && peek_char == '$') |
b72432fd | 4091 | { |
f73dda09 | 4092 | ttok = (char *)xmalloc (3); |
b72432fd JA |
4093 | ttok[0] = ttok[1] = '$'; |
4094 | ttok[2] = '\0'; | |
4095 | RESIZE_MALLOCED_BUFFER (token, token_index, 3, | |
4096 | token_buffer_size, | |
4097 | TOKEN_DEFAULT_GROW_SIZE); | |
4098 | strcpy (token + token_index, ttok); | |
4099 | token_index += 2; | |
4100 | dollar_present = 1; | |
f73dda09 | 4101 | all_digit_token = 0; |
b72432fd JA |
4102 | FREE (ttok); |
4103 | goto next_character; | |
4104 | } | |
ccc6cda3 JA |
4105 | else |
4106 | shell_ungetc (peek_char); | |
4107 | } | |
726f6388 | 4108 | |
ccc6cda3 | 4109 | #if defined (ARRAY_VARS) |
7117c2d2 JA |
4110 | /* Identify possible array subscript assignment; match [...] */ |
4111 | else if MBTEST(character == '[' && token_index > 0 && assignment_acceptable (last_read_token) && token_is_ident (token, token_index)) /* ] */ | |
4112 | { | |
4113 | ttok = parse_matched_pair (cd, '[', ']', &ttoklen, 0); | |
4114 | if (ttok == &matched_pair_error) | |
4115 | return -1; /* Bail immediately. */ | |
4116 | RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 2, | |
4117 | token_buffer_size, | |
4118 | TOKEN_DEFAULT_GROW_SIZE); | |
4119 | token[token_index++] = character; | |
4120 | strcpy (token + token_index, ttok); | |
4121 | token_index += ttoklen; | |
4122 | FREE (ttok); | |
4123 | all_digit_token = 0; | |
4124 | goto next_character; | |
4125 | } | |
ccc6cda3 | 4126 | /* Identify possible compound array variable assignment. */ |
301e2142 | 4127 | else if MBTEST(character == '=' && token_index > 0 && (assignment_acceptable (last_read_token) || (parser_state & PST_ASSIGNOK)) && token_is_assignment (token, token_index)) |
ccc6cda3 JA |
4128 | { |
4129 | peek_char = shell_getc (1); | |
7117c2d2 | 4130 | if MBTEST(peek_char == '(') /* ) */ |
ccc6cda3 | 4131 | { |
7117c2d2 JA |
4132 | ttok = parse_compound_assignment (&ttoklen); |
4133 | ||
4134 | RESIZE_MALLOCED_BUFFER (token, token_index, ttoklen + 4, | |
ccc6cda3 JA |
4135 | token_buffer_size, |
4136 | TOKEN_DEFAULT_GROW_SIZE); | |
7117c2d2 JA |
4137 | |
4138 | token[token_index++] = '='; | |
4139 | token[token_index++] = '('; | |
4140 | if (ttok) | |
4141 | { | |
4142 | strcpy (token + token_index, ttok); | |
4143 | token_index += ttoklen; | |
4144 | } | |
4145 | token[token_index++] = ')'; | |
ccc6cda3 | 4146 | FREE (ttok); |
f73dda09 | 4147 | all_digit_token = 0; |
43df7bbb | 4148 | compound_assignment = 1; |
ac18b312 | 4149 | #if 1 |
ccc6cda3 | 4150 | goto next_character; |
43df7bbb CR |
4151 | #else |
4152 | goto got_token; /* ksh93 seems to do this */ | |
4153 | #endif | |
ccc6cda3 JA |
4154 | } |
4155 | else | |
4156 | shell_ungetc (peek_char); | |
4157 | } | |
4158 | #endif | |
726f6388 | 4159 | |
ccc6cda3 JA |
4160 | /* When not parsing a multi-character word construct, shell meta- |
4161 | characters break words. */ | |
7117c2d2 | 4162 | if MBTEST(shellbreak (character)) |
ccc6cda3 JA |
4163 | { |
4164 | shell_ungetc (character); | |
4165 | goto got_token; | |
4166 | } | |
726f6388 | 4167 | |
ccc6cda3 | 4168 | got_character: |
726f6388 | 4169 | |
28157acd CR |
4170 | if (character == CTLESC || character == CTLNUL) |
4171 | token[token_index++] = CTLESC; | |
4172 | ||
d3ad40de CR |
4173 | got_escaped_character: |
4174 | ||
4175 | all_digit_token &= DIGIT (character); | |
4176 | dollar_present |= character == '$'; | |
4177 | ||
ccc6cda3 | 4178 | token[token_index++] = character; |
726f6388 | 4179 | |
ccc6cda3 JA |
4180 | RESIZE_MALLOCED_BUFFER (token, token_index, 1, token_buffer_size, |
4181 | TOKEN_DEFAULT_GROW_SIZE); | |
726f6388 | 4182 | |
ccc6cda3 | 4183 | next_character: |
d3a24ed2 | 4184 | if (character == '\n' && SHOULD_PROMPT ()) |
ccc6cda3 | 4185 | prompt_again (); |
726f6388 | 4186 | |
ccc6cda3 JA |
4187 | /* We want to remove quoted newlines (that is, a \<newline> pair) |
4188 | unless we are within single quotes or pass_next_character is | |
4189 | set (the shell equivalent of literal-next). */ | |
4190 | cd = current_delimiter (dstack); | |
4191 | character = shell_getc (cd != '\'' && pass_next_character == 0); | |
4192 | } /* end for (;;) */ | |
726f6388 | 4193 | |
ccc6cda3 | 4194 | got_token: |
726f6388 | 4195 | |
ccc6cda3 | 4196 | token[token_index] = '\0'; |
726f6388 | 4197 | |
ccc6cda3 JA |
4198 | /* Check to see what thing we should return. If the last_read_token |
4199 | is a `<', or a `&', or the character which ended this token is | |
4200 | a '>' or '<', then, and ONLY then, is this input token a NUMBER. | |
4201 | Otherwise, it is just a word, and should be returned as such. */ | |
7117c2d2 JA |
4202 | if MBTEST(all_digit_token && (character == '<' || character == '>' || \ |
4203 | last_read_token == LESS_AND || \ | |
ccc6cda3 | 4204 | last_read_token == GREATER_AND)) |
726f6388 | 4205 | { |
f73dda09 JA |
4206 | if (legal_number (token, &lvalue) && (int)lvalue == lvalue) |
4207 | yylval.number = lvalue; | |
4208 | else | |
4209 | yylval.number = -1; | |
ccc6cda3 | 4210 | return (NUMBER); |
726f6388 JA |
4211 | } |
4212 | ||
ccc6cda3 | 4213 | /* Check for special case tokens. */ |
7117c2d2 | 4214 | result = (last_shell_getc_is_singlebyte) ? special_case_tokens (token) : -1; |
ccc6cda3 JA |
4215 | if (result >= 0) |
4216 | return result; | |
726f6388 JA |
4217 | |
4218 | #if defined (ALIAS) | |
ccc6cda3 JA |
4219 | /* Posix.2 does not allow reserved words to be aliased, so check for all |
4220 | of them, including special cases, before expanding the current token | |
4221 | as an alias. */ | |
7117c2d2 | 4222 | if MBTEST(posixly_correct) |
ccc6cda3 JA |
4223 | CHECK_FOR_RESERVED_WORD (token); |
4224 | ||
4225 | /* Aliases are expanded iff EXPAND_ALIASES is non-zero, and quoting | |
4226 | inhibits alias expansion. */ | |
4227 | if (expand_aliases && quoted == 0) | |
4228 | { | |
4229 | result = alias_expand_token (token); | |
4230 | if (result == RE_READ_TOKEN) | |
4231 | return (RE_READ_TOKEN); | |
4232 | else if (result == NO_EXPANSION) | |
4233 | parser_state &= ~PST_ALEXPNEXT; | |
4234 | } | |
726f6388 | 4235 | |
ccc6cda3 JA |
4236 | /* If not in Posix.2 mode, check for reserved words after alias |
4237 | expansion. */ | |
7117c2d2 | 4238 | if MBTEST(posixly_correct == 0) |
ccc6cda3 JA |
4239 | #endif |
4240 | CHECK_FOR_RESERVED_WORD (token); | |
4241 | ||
4242 | the_word = (WORD_DESC *)xmalloc (sizeof (WORD_DESC)); | |
f73dda09 | 4243 | the_word->word = (char *)xmalloc (1 + token_index); |
ccc6cda3 JA |
4244 | the_word->flags = 0; |
4245 | strcpy (the_word->word, token); | |
4246 | if (dollar_present) | |
4247 | the_word->flags |= W_HASDOLLAR; | |
4248 | if (quoted) | |
d3ad40de CR |
4249 | the_word->flags |= W_QUOTED; /*(*/ |
4250 | if (compound_assignment && token[token_index-1] == ')') | |
43df7bbb | 4251 | the_word->flags |= W_COMPASSIGN; |
ccc6cda3 JA |
4252 | /* A word is an assignment if it appears at the beginning of a |
4253 | simple command, or after another assignment word. This is | |
4254 | context-dependent, so it cannot be handled in the grammar. */ | |
5e13499c | 4255 | if (assignment (token, (parser_state & PST_COMPASSIGN) != 0)) |
ccc6cda3 JA |
4256 | { |
4257 | the_word->flags |= W_ASSIGNMENT; | |
4258 | /* Don't perform word splitting on assignment statements. */ | |
5e13499c | 4259 | if (assignment_acceptable (last_read_token) || (parser_state & PST_COMPASSIGN) != 0) |
ccc6cda3 JA |
4260 | the_word->flags |= W_NOSPLIT; |
4261 | } | |
726f6388 | 4262 | |
301e2142 CR |
4263 | if (command_token_position (last_read_token)) |
4264 | { | |
4265 | struct builtin *b; | |
4266 | b = builtin_address_internal (token, 0); | |
4267 | if (b && (b->flags & ASSIGNMENT_BUILTIN)) | |
5e4a95c7 CR |
4268 | parser_state |= PST_ASSIGNOK; |
4269 | else if (STREQ (token, "eval") || STREQ (token, "let")) | |
4270 | parser_state |= PST_ASSIGNOK; | |
301e2142 CR |
4271 | } |
4272 | ||
ccc6cda3 | 4273 | yylval.word = the_word; |
726f6388 | 4274 | |
ccc6cda3 JA |
4275 | result = ((the_word->flags & (W_ASSIGNMENT|W_NOSPLIT)) == (W_ASSIGNMENT|W_NOSPLIT)) |
4276 | ? ASSIGNMENT_WORD : WORD; | |
726f6388 | 4277 | |
d3a24ed2 | 4278 | switch (last_read_token) |
ccc6cda3 | 4279 | { |
d3a24ed2 | 4280 | case FUNCTION: |
ccc6cda3 JA |
4281 | parser_state |= PST_ALLOWOPNBRC; |
4282 | function_dstart = line_number; | |
d3a24ed2 CR |
4283 | break; |
4284 | case CASE: | |
4285 | case SELECT: | |
4286 | case FOR: | |
4287 | if (word_top < MAX_CASE_NEST) | |
4288 | word_top++; | |
4289 | word_lineno[word_top] = line_number; | |
4290 | break; | |
ccc6cda3 | 4291 | } |
726f6388 | 4292 | |
ccc6cda3 JA |
4293 | return (result); |
4294 | } | |
726f6388 | 4295 | |
f73dda09 | 4296 | /* Return 1 if TOKSYM is a token that after being read would allow |
726f6388 JA |
4297 | a reserved word to be seen, else 0. */ |
4298 | static int | |
f73dda09 JA |
4299 | reserved_word_acceptable (toksym) |
4300 | int toksym; | |
726f6388 | 4301 | { |
7117c2d2 JA |
4302 | switch (toksym) |
4303 | { | |
4304 | case '\n': | |
4305 | case ';': | |
4306 | case '(': | |
4307 | case ')': | |
4308 | case '|': | |
4309 | case '&': | |
4310 | case '{': | |
4311 | case '}': /* XXX */ | |
4312 | case AND_AND: | |
4313 | case BANG: | |
4314 | case DO: | |
4315 | case DONE: | |
4316 | case ELIF: | |
4317 | case ELSE: | |
4318 | case ESAC: | |
4319 | case FI: | |
4320 | case IF: | |
4321 | case OR_OR: | |
4322 | case SEMI_SEMI: | |
8943768b CR |
4323 | case SEMI_AND: |
4324 | case SEMI_SEMI_AND: | |
7117c2d2 JA |
4325 | case THEN: |
4326 | case TIME: | |
4327 | case TIMEOPT: | |
4328 | case UNTIL: | |
4329 | case WHILE: | |
4330 | case 0: | |
4331 | return 1; | |
4332 | default: | |
4333 | return 0; | |
4334 | } | |
726f6388 | 4335 | } |
7117c2d2 | 4336 | |
726f6388 JA |
4337 | /* Return the index of TOKEN in the alist of reserved words, or -1 if |
4338 | TOKEN is not a shell reserved word. */ | |
4339 | int | |
f73dda09 JA |
4340 | find_reserved_word (tokstr) |
4341 | char *tokstr; | |
726f6388 JA |
4342 | { |
4343 | int i; | |
ccc6cda3 | 4344 | for (i = 0; word_token_alist[i].word; i++) |
f73dda09 | 4345 | if (STREQ (tokstr, word_token_alist[i].word)) |
726f6388 JA |
4346 | return i; |
4347 | return -1; | |
4348 | } | |
4349 | ||
ccc6cda3 | 4350 | #if 0 |
726f6388 JA |
4351 | #if defined (READLINE) |
4352 | /* Called after each time readline is called. This insures that whatever | |
4353 | the new prompt string is gets propagated to readline's local prompt | |
4354 | variable. */ | |
4355 | static void | |
4356 | reset_readline_prompt () | |
4357 | { | |
ccc6cda3 JA |
4358 | char *temp_prompt; |
4359 | ||
726f6388 JA |
4360 | if (prompt_string_pointer) |
4361 | { | |
ccc6cda3 | 4362 | temp_prompt = (*prompt_string_pointer) |
726f6388 JA |
4363 | ? decode_prompt_string (*prompt_string_pointer) |
4364 | : (char *)NULL; | |
4365 | ||
4366 | if (temp_prompt == 0) | |
4367 | { | |
f73dda09 | 4368 | temp_prompt = (char *)xmalloc (1); |
726f6388 JA |
4369 | temp_prompt[0] = '\0'; |
4370 | } | |
4371 | ||
4372 | FREE (current_readline_prompt); | |
726f6388 JA |
4373 | current_readline_prompt = temp_prompt; |
4374 | } | |
4375 | } | |
4376 | #endif /* READLINE */ | |
ccc6cda3 | 4377 | #endif /* 0 */ |
726f6388 JA |
4378 | |
4379 | #if defined (HISTORY) | |
4380 | /* A list of tokens which can be followed by newlines, but not by | |
4381 | semi-colons. When concatenating multiple lines of history, the | |
4382 | newline separator for such tokens is replaced with a space. */ | |
d3ad40de | 4383 | static const int no_semi_successors[] = { |
726f6388 | 4384 | '\n', '{', '(', ')', ';', '&', '|', |
8943768b CR |
4385 | CASE, DO, ELSE, IF, SEMI_SEMI, SEMI_AND, SEMI_SEMI_AND, THEN, UNTIL, |
4386 | WHILE, AND_AND, OR_OR, IN, | |
726f6388 JA |
4387 | 0 |
4388 | }; | |
4389 | ||
4390 | /* If we are not within a delimited expression, try to be smart | |
4391 | about which separators can be semi-colons and which must be | |
ccc6cda3 JA |
4392 | newlines. Returns the string that should be added into the |
4393 | history entry. */ | |
726f6388 JA |
4394 | char * |
4395 | history_delimiting_chars () | |
4396 | { | |
ccc6cda3 JA |
4397 | register int i; |
4398 | ||
4399 | if (dstack.delimiter_depth != 0) | |
4400 | return ("\n"); | |
4401 | ||
4402 | /* First, handle some special cases. */ | |
4403 | /*(*/ | |
4404 | /* If we just read `()', assume it's a function definition, and don't | |
4405 | add a semicolon. If the token before the `)' was not `(', and we're | |
4406 | not in the midst of parsing a case statement, assume it's a | |
4407 | parenthesized command and add the semicolon. */ | |
4408 | /*)(*/ | |
4409 | if (token_before_that == ')') | |
726f6388 | 4410 | { |
ccc6cda3 JA |
4411 | if (two_tokens_ago == '(') /*)*/ /* function def */ |
4412 | return " "; | |
4413 | /* This does not work for subshells inside case statement | |
4414 | command lists. It's a suboptimal solution. */ | |
4415 | else if (parser_state & PST_CASESTMT) /* case statement pattern */ | |
28ef6c31 | 4416 | return " "; |
ccc6cda3 | 4417 | else |
28ef6c31 | 4418 | return "; "; /* (...) subshell */ |
ccc6cda3 | 4419 | } |
cce855bc JA |
4420 | else if (token_before_that == WORD && two_tokens_ago == FUNCTION) |
4421 | return " "; /* function def using `function name' without `()' */ | |
726f6388 | 4422 | |
bb70624e JA |
4423 | else if (token_before_that == WORD && two_tokens_ago == FOR) |
4424 | { | |
4425 | /* Tricky. `for i\nin ...' should not have a semicolon, but | |
4426 | `for i\ndo ...' should. We do what we can. */ | |
4427 | for (i = shell_input_line_index; whitespace(shell_input_line[i]); i++) | |
28ef6c31 | 4428 | ; |
bb70624e JA |
4429 | if (shell_input_line[i] && shell_input_line[i] == 'i' && shell_input_line[i+1] == 'n') |
4430 | return " "; | |
4431 | return ";"; | |
4432 | } | |
633e5c6d CR |
4433 | else if (two_tokens_ago == CASE && token_before_that == WORD && (parser_state & PST_CASESTMT)) |
4434 | return " "; | |
bb70624e | 4435 | |
ccc6cda3 JA |
4436 | for (i = 0; no_semi_successors[i]; i++) |
4437 | { | |
4438 | if (token_before_that == no_semi_successors[i]) | |
4439 | return (" "); | |
726f6388 | 4440 | } |
ccc6cda3 JA |
4441 | |
4442 | return ("; "); | |
726f6388 JA |
4443 | } |
4444 | #endif /* HISTORY */ | |
4445 | ||
4446 | /* Issue a prompt, or prepare to issue a prompt when the next character | |
4447 | is read. */ | |
4448 | static void | |
4449 | prompt_again () | |
4450 | { | |
4451 | char *temp_prompt; | |
4452 | ||
d3a24ed2 | 4453 | if (interactive == 0 || expanding_alias()) /* XXX */ |
726f6388 JA |
4454 | return; |
4455 | ||
4456 | ps1_prompt = get_string_value ("PS1"); | |
4457 | ps2_prompt = get_string_value ("PS2"); | |
4458 | ||
4459 | if (!prompt_string_pointer) | |
4460 | prompt_string_pointer = &ps1_prompt; | |
4461 | ||
ccc6cda3 | 4462 | temp_prompt = *prompt_string_pointer |
726f6388 JA |
4463 | ? decode_prompt_string (*prompt_string_pointer) |
4464 | : (char *)NULL; | |
4465 | ||
4466 | if (temp_prompt == 0) | |
4467 | { | |
f73dda09 | 4468 | temp_prompt = (char *)xmalloc (1); |
726f6388 JA |
4469 | temp_prompt[0] = '\0'; |
4470 | } | |
4471 | ||
4472 | current_prompt_string = *prompt_string_pointer; | |
4473 | prompt_string_pointer = &ps2_prompt; | |
4474 | ||
4475 | #if defined (READLINE) | |
4476 | if (!no_line_editing) | |
4477 | { | |
4478 | FREE (current_readline_prompt); | |
4479 | current_readline_prompt = temp_prompt; | |
4480 | } | |
4481 | else | |
4482 | #endif /* READLINE */ | |
4483 | { | |
4484 | FREE (current_decoded_prompt); | |
4485 | current_decoded_prompt = temp_prompt; | |
4486 | } | |
4487 | } | |
4488 | ||
bb70624e JA |
4489 | int |
4490 | get_current_prompt_level () | |
4491 | { | |
4492 | return ((current_prompt_string && current_prompt_string == ps2_prompt) ? 2 : 1); | |
4493 | } | |
4494 | ||
4495 | void | |
4496 | set_current_prompt_level (x) | |
4497 | int x; | |
4498 | { | |
4499 | prompt_string_pointer = (x == 2) ? &ps2_prompt : &ps1_prompt; | |
4500 | current_prompt_string = *prompt_string_pointer; | |
4501 | } | |
4502 | ||
726f6388 JA |
4503 | static void |
4504 | print_prompt () | |
4505 | { | |
4506 | fprintf (stderr, "%s", current_decoded_prompt); | |
4507 | fflush (stderr); | |
4508 | } | |
4509 | ||
4510 | /* Return a string which will be printed as a prompt. The string | |
4511 | may contain special characters which are decoded as follows: | |
ccc6cda3 JA |
4512 | |
4513 | \a bell (ascii 07) | |
ccc6cda3 | 4514 | \d the date in Day Mon Date format |
7117c2d2 | 4515 | \e escape (ascii 033) |
ccc6cda3 JA |
4516 | \h the hostname up to the first `.' |
4517 | \H the hostname | |
bb70624e JA |
4518 | \j the number of active jobs |
4519 | \l the basename of the shell's tty device name | |
726f6388 | 4520 | \n CRLF |
7117c2d2 | 4521 | \r CR |
726f6388 | 4522 | \s the name of the shell |
ccc6cda3 JA |
4523 | \t the time in 24-hour hh:mm:ss format |
4524 | \T the time in 12-hour hh:mm:ss format | |
7117c2d2 JA |
4525 | \@ the time in 12-hour hh:mm am/pm format |
4526 | \A the time in 24-hour hh:mm format | |
4527 | \D{fmt} the result of passing FMT to strftime(3) | |
4528 | \u your username | |
ccc6cda3 JA |
4529 | \v the version of bash (e.g., 2.00) |
4530 | \V the release of bash, version + patchlevel (e.g., 2.00.0) | |
726f6388 | 4531 | \w the current working directory |
ccc6cda3 | 4532 | \W the last element of $PWD |
726f6388 | 4533 | \! the history number of this command |
7117c2d2 | 4534 | \# the command number of this command |
726f6388 | 4535 | \$ a $ or a # if you are root |
ccc6cda3 | 4536 | \nnn character code nnn in octal |
726f6388 | 4537 | \\ a backslash |
ccc6cda3 JA |
4538 | \[ begin a sequence of non-printing chars |
4539 | \] end a sequence of non-printing chars | |
726f6388 | 4540 | */ |
d166f048 | 4541 | #define PROMPT_GROWTH 48 |
726f6388 JA |
4542 | char * |
4543 | decode_prompt_string (string) | |
4544 | char *string; | |
4545 | { | |
726f6388 | 4546 | WORD_LIST *list; |
ccc6cda3 JA |
4547 | char *result, *t; |
4548 | struct dstack save_dstack; | |
f73dda09 | 4549 | int last_exit_value; |
726f6388 | 4550 | #if defined (PROMPT_STRING_DECODE) |
ccc6cda3 | 4551 | int result_size, result_index; |
d3ad40de | 4552 | int c, n, i; |
ccc6cda3 | 4553 | char *temp, octal_string[4]; |
7117c2d2 | 4554 | struct tm *tm; |
ccc6cda3 | 4555 | time_t the_time; |
7117c2d2 JA |
4556 | char timebuf[128]; |
4557 | char *timefmt; | |
726f6388 | 4558 | |
f73dda09 | 4559 | result = (char *)xmalloc (result_size = PROMPT_GROWTH); |
ccc6cda3 JA |
4560 | result[result_index = 0] = 0; |
4561 | temp = (char *)NULL; | |
726f6388 JA |
4562 | |
4563 | while (c = *string++) | |
4564 | { | |
4565 | if (posixly_correct && c == '!') | |
4566 | { | |
4567 | if (*string == '!') | |
4568 | { | |
4569 | temp = savestring ("!"); | |
4570 | goto add_string; | |
4571 | } | |
4572 | else | |
4573 | { | |
4574 | #if !defined (HISTORY) | |
4575 | temp = savestring ("1"); | |
4576 | #else /* HISTORY */ | |
4577 | temp = itos (history_number ()); | |
4578 | #endif /* HISTORY */ | |
4579 | string--; /* add_string increments string again. */ | |
4580 | goto add_string; | |
4581 | } | |
ccc6cda3 | 4582 | } |
726f6388 JA |
4583 | if (c == '\\') |
4584 | { | |
4585 | c = *string; | |
4586 | ||
4587 | switch (c) | |
4588 | { | |
4589 | case '0': | |
4590 | case '1': | |
4591 | case '2': | |
4592 | case '3': | |
4593 | case '4': | |
4594 | case '5': | |
4595 | case '6': | |
4596 | case '7': | |
ccc6cda3 JA |
4597 | strncpy (octal_string, string, 3); |
4598 | octal_string[3] = '\0'; | |
726f6388 | 4599 | |
ccc6cda3 | 4600 | n = read_octal (octal_string); |
f73dda09 | 4601 | temp = (char *)xmalloc (3); |
726f6388 | 4602 | |
ccc6cda3 JA |
4603 | if (n == CTLESC || n == CTLNUL) |
4604 | { | |
ccc6cda3 JA |
4605 | temp[0] = CTLESC; |
4606 | temp[1] = n; | |
4607 | temp[2] = '\0'; | |
4608 | } | |
4609 | else if (n == -1) | |
4610 | { | |
4611 | temp[0] = '\\'; | |
4612 | temp[1] = '\0'; | |
4613 | } | |
4614 | else | |
4615 | { | |
ccc6cda3 JA |
4616 | temp[0] = n; |
4617 | temp[1] = '\0'; | |
4618 | } | |
726f6388 | 4619 | |
28ef6c31 JA |
4620 | for (c = 0; n != -1 && c < 3 && ISOCTAL (*string); c++) |
4621 | string++; | |
4622 | ||
7117c2d2 | 4623 | c = 0; /* tested at add_string: */ |
ccc6cda3 | 4624 | goto add_string; |
726f6388 | 4625 | |
726f6388 | 4626 | case 'd': |
7117c2d2 | 4627 | case 't': |
ccc6cda3 JA |
4628 | case 'T': |
4629 | case '@': | |
f73dda09 | 4630 | case 'A': |
726f6388 | 4631 | /* Make the current time/date into a string. */ |
7117c2d2 JA |
4632 | (void) time (&the_time); |
4633 | tm = localtime (&the_time); | |
4634 | ||
4635 | if (c == 'd') | |
4636 | n = strftime (timebuf, sizeof (timebuf), "%a %b %d", tm); | |
4637 | else if (c == 't') | |
4638 | n = strftime (timebuf, sizeof (timebuf), "%H:%M:%S", tm); | |
4639 | else if (c == 'T') | |
4640 | n = strftime (timebuf, sizeof (timebuf), "%I:%M:%S", tm); | |
4641 | else if (c == '@') | |
4642 | n = strftime (timebuf, sizeof (timebuf), "%I:%M %p", tm); | |
4643 | else if (c == 'A') | |
4644 | n = strftime (timebuf, sizeof (timebuf), "%H:%M", tm); | |
4645 | ||
c2258e1c CR |
4646 | if (n == 0) |
4647 | timebuf[0] = '\0'; | |
4648 | else | |
4649 | timebuf[sizeof(timebuf) - 1] = '\0'; | |
4650 | ||
7117c2d2 JA |
4651 | temp = savestring (timebuf); |
4652 | goto add_string; | |
726f6388 | 4653 | |
7117c2d2 JA |
4654 | case 'D': /* strftime format */ |
4655 | if (string[1] != '{') /* } */ | |
4656 | goto not_escape; | |
726f6388 | 4657 | |
7117c2d2 JA |
4658 | (void) time (&the_time); |
4659 | tm = localtime (&the_time); | |
4660 | string += 2; /* skip { */ | |
4661 | timefmt = xmalloc (strlen (string) + 3); | |
4662 | for (t = timefmt; *string && *string != '}'; ) | |
4663 | *t++ = *string++; | |
4664 | *t = '\0'; | |
4665 | c = *string; /* tested at add_string */ | |
4666 | if (timefmt[0] == '\0') | |
ccc6cda3 | 4667 | { |
7117c2d2 JA |
4668 | timefmt[0] = '%'; |
4669 | timefmt[1] = 'X'; /* locale-specific current time */ | |
4670 | timefmt[2] = '\0'; | |
ccc6cda3 | 4671 | } |
7117c2d2 JA |
4672 | n = strftime (timebuf, sizeof (timebuf), timefmt, tm); |
4673 | free (timefmt); | |
4674 | ||
c2258e1c CR |
4675 | if (n == 0) |
4676 | timebuf[0] = '\0'; | |
4677 | else | |
4678 | timebuf[sizeof(timebuf) - 1] = '\0'; | |
4679 | ||
7117c2d2 JA |
4680 | if (promptvars || posixly_correct) |
4681 | /* Make sure that expand_prompt_string is called with a | |
4682 | second argument of Q_DOUBLE_QUOTES if we use this | |
4683 | function here. */ | |
4684 | temp = sh_backslash_quote_for_double_quotes (timebuf); | |
4685 | else | |
4686 | temp = savestring (timebuf); | |
ccc6cda3 | 4687 | goto add_string; |
7117c2d2 | 4688 | |
726f6388 | 4689 | case 'n': |
f73dda09 | 4690 | temp = (char *)xmalloc (3); |
ccc6cda3 JA |
4691 | temp[0] = no_line_editing ? '\n' : '\r'; |
4692 | temp[1] = no_line_editing ? '\0' : '\n'; | |
4693 | temp[2] = '\0'; | |
726f6388 JA |
4694 | goto add_string; |
4695 | ||
4696 | case 's': | |
ccc6cda3 JA |
4697 | temp = base_pathname (shell_name); |
4698 | temp = savestring (temp); | |
4699 | goto add_string; | |
4700 | ||
4701 | case 'v': | |
4702 | case 'V': | |
7117c2d2 | 4703 | temp = (char *)xmalloc (16); |
ccc6cda3 JA |
4704 | if (c == 'v') |
4705 | strcpy (temp, dist_version); | |
4706 | else | |
4707 | sprintf (temp, "%s.%d", dist_version, patch_level); | |
4708 | goto add_string; | |
4709 | ||
726f6388 JA |
4710 | case 'w': |
4711 | case 'W': | |
4712 | { | |
ccc6cda3 | 4713 | /* Use the value of PWD because it is much more efficient. */ |
d3ad40de | 4714 | char t_string[PATH_MAX]; |
e8ce775d | 4715 | int tlen; |
726f6388 JA |
4716 | |
4717 | temp = get_string_value ("PWD"); | |
4718 | ||
ccc6cda3 JA |
4719 | if (temp == 0) |
4720 | { | |
4721 | if (getcwd (t_string, sizeof(t_string)) == 0) | |
4722 | { | |
28ef6c31 | 4723 | t_string[0] = '.'; |
e8ce775d | 4724 | tlen = 1; |
ccc6cda3 | 4725 | } |
e8ce775d JA |
4726 | else |
4727 | tlen = strlen (t_string); | |
ccc6cda3 | 4728 | } |
726f6388 | 4729 | else |
e8ce775d JA |
4730 | { |
4731 | tlen = sizeof (t_string) - 1; | |
4732 | strncpy (t_string, temp, tlen); | |
4733 | } | |
4734 | t_string[tlen] = '\0'; | |
726f6388 | 4735 | |
28ef6c31 JA |
4736 | #define ROOT_PATH(x) ((x)[0] == '/' && (x)[1] == 0) |
4737 | #define DOUBLE_SLASH_ROOT(x) ((x)[0] == '/' && (x)[1] == '/' && (x)[2] == 0) | |
12d937f9 | 4738 | /* Abbreviate \W as ~ if $PWD == $HOME */ |
3ee6b87d | 4739 | if (c == 'W' && (((t = get_string_value ("HOME")) == 0) || STREQ (t, t_string) == 0)) |
726f6388 | 4740 | { |
28ef6c31 JA |
4741 | if (ROOT_PATH (t_string) == 0 && DOUBLE_SLASH_ROOT (t_string) == 0) |
4742 | { | |
4743 | t = strrchr (t_string, '/'); | |
4744 | if (t) | |
4745 | strcpy (t_string, t + 1); | |
4746 | } | |
726f6388 | 4747 | } |
28ef6c31 JA |
4748 | #undef ROOT_PATH |
4749 | #undef DOUBLE_SLASH_ROOT | |
726f6388 | 4750 | else |
e8ce775d JA |
4751 | /* polite_directory_format is guaranteed to return a string |
4752 | no longer than PATH_MAX - 1 characters. */ | |
ccc6cda3 JA |
4753 | strcpy (t_string, polite_directory_format (t_string)); |
4754 | ||
ed35cb4a | 4755 | temp = trim_pathname (t_string, PATH_MAX - 1); |
ccc6cda3 JA |
4756 | /* If we're going to be expanding the prompt string later, |
4757 | quote the directory name. */ | |
4758 | if (promptvars || posixly_correct) | |
bb70624e | 4759 | /* Make sure that expand_prompt_string is called with a |
7117c2d2 | 4760 | second argument of Q_DOUBLE_QUOTES if we use this |
bb70624e | 4761 | function here. */ |
28ef6c31 | 4762 | temp = sh_backslash_quote_for_double_quotes (t_string); |
ccc6cda3 JA |
4763 | else |
4764 | temp = savestring (t_string); | |
4765 | ||
726f6388 JA |
4766 | goto add_string; |
4767 | } | |
ccc6cda3 | 4768 | |
726f6388 | 4769 | case 'u': |
bb70624e JA |
4770 | if (current_user.user_name == 0) |
4771 | get_current_user_info (); | |
ccc6cda3 JA |
4772 | temp = savestring (current_user.user_name); |
4773 | goto add_string; | |
726f6388 JA |
4774 | |
4775 | case 'h': | |
ccc6cda3 JA |
4776 | case 'H': |
4777 | temp = savestring (current_host_name); | |
4778 | if (c == 'h' && (t = (char *)strchr (temp, '.'))) | |
4779 | *t = '\0'; | |
4780 | goto add_string; | |
726f6388 JA |
4781 | |
4782 | case '#': | |
ccc6cda3 JA |
4783 | temp = itos (current_command_number); |
4784 | goto add_string; | |
726f6388 JA |
4785 | |
4786 | case '!': | |
726f6388 | 4787 | #if !defined (HISTORY) |
ccc6cda3 | 4788 | temp = savestring ("1"); |
726f6388 | 4789 | #else /* HISTORY */ |
ccc6cda3 | 4790 | temp = itos (history_number ()); |
726f6388 | 4791 | #endif /* HISTORY */ |
ccc6cda3 | 4792 | goto add_string; |
726f6388 JA |
4793 | |
4794 | case '$': | |
f73dda09 | 4795 | t = temp = (char *)xmalloc (3); |
b72432fd JA |
4796 | if ((promptvars || posixly_correct) && (current_user.euid != 0)) |
4797 | *t++ = '\\'; | |
4798 | *t++ = current_user.euid == 0 ? '#' : '$'; | |
4799 | *t = '\0'; | |
726f6388 JA |
4800 | goto add_string; |
4801 | ||
bb70624e JA |
4802 | case 'j': |
4803 | temp = itos (count_all_jobs ()); | |
4804 | goto add_string; | |
4805 | ||
4806 | case 'l': | |
4807 | #if defined (HAVE_TTYNAME) | |
4808 | temp = (char *)ttyname (fileno (stdin)); | |
4809 | t = temp ? base_pathname (temp) : "tty"; | |
4810 | temp = savestring (t); | |
4811 | #else | |
4812 | temp = savestring ("tty"); | |
4813 | #endif /* !HAVE_TTYNAME */ | |
4814 | goto add_string; | |
4815 | ||
726f6388 JA |
4816 | #if defined (READLINE) |
4817 | case '[': | |
4818 | case ']': | |
d3a24ed2 CR |
4819 | if (no_line_editing) |
4820 | { | |
4821 | string++; | |
4822 | break; | |
4823 | } | |
f73dda09 | 4824 | temp = (char *)xmalloc (3); |
d3ad40de CR |
4825 | n = (c == '[') ? RL_PROMPT_START_IGNORE : RL_PROMPT_END_IGNORE; |
4826 | i = 0; | |
4827 | if (n == CTLESC || n == CTLNUL) | |
4828 | temp[i++] = CTLESC; | |
4829 | temp[i++] = n; | |
4830 | temp[i] = '\0'; | |
726f6388 | 4831 | goto add_string; |
ccc6cda3 | 4832 | #endif /* READLINE */ |
726f6388 JA |
4833 | |
4834 | case '\\': | |
ccc6cda3 JA |
4835 | case 'a': |
4836 | case 'e': | |
7117c2d2 | 4837 | case 'r': |
f73dda09 | 4838 | temp = (char *)xmalloc (2); |
7117c2d2 JA |
4839 | if (c == 'a') |
4840 | temp[0] = '\07'; | |
4841 | else if (c == 'e') | |
4842 | temp[0] = '\033'; | |
4843 | else if (c == 'r') | |
4844 | temp[0] = '\r'; | |
4845 | else /* (c == '\\') */ | |
4846 | temp[0] = c; | |
ccc6cda3 | 4847 | temp[1] = '\0'; |
726f6388 JA |
4848 | goto add_string; |
4849 | ||
4850 | default: | |
7117c2d2 | 4851 | not_escape: |
f73dda09 | 4852 | temp = (char *)xmalloc (3); |
ccc6cda3 | 4853 | temp[0] = '\\'; |
726f6388 | 4854 | temp[1] = c; |
ccc6cda3 | 4855 | temp[2] = '\0'; |
726f6388 JA |
4856 | |
4857 | add_string: | |
4858 | if (c) | |
4859 | string++; | |
4860 | result = | |
4861 | sub_append_string (temp, result, &result_index, &result_size); | |
ccc6cda3 | 4862 | temp = (char *)NULL; /* Freed in sub_append_string (). */ |
726f6388 JA |
4863 | result[result_index] = '\0'; |
4864 | break; | |
4865 | } | |
4866 | } | |
4867 | else | |
4868 | { | |
ccc6cda3 | 4869 | RESIZE_MALLOCED_BUFFER (result, result_index, 3, result_size, PROMPT_GROWTH); |
726f6388 JA |
4870 | result[result_index++] = c; |
4871 | result[result_index] = '\0'; | |
4872 | } | |
4873 | } | |
4874 | #else /* !PROMPT_STRING_DECODE */ | |
4875 | result = savestring (string); | |
4876 | #endif /* !PROMPT_STRING_DECODE */ | |
4877 | ||
ccc6cda3 JA |
4878 | /* Save the delimiter stack and point `dstack' to temp space so any |
4879 | command substitutions in the prompt string won't result in screwing | |
4880 | up the parser's quoting state. */ | |
4881 | save_dstack = dstack; | |
4882 | dstack = temp_dstack; | |
4883 | dstack.delimiter_depth = 0; | |
4884 | ||
726f6388 JA |
4885 | /* Perform variable and parameter expansion and command substitution on |
4886 | the prompt string. */ | |
ccc6cda3 JA |
4887 | if (promptvars || posixly_correct) |
4888 | { | |
f73dda09 | 4889 | last_exit_value = last_command_exit_value; |
4d8d005b | 4890 | list = expand_prompt_string (result, Q_DOUBLE_QUOTES, 0); |
ccc6cda3 JA |
4891 | free (result); |
4892 | result = string_list (list); | |
4893 | dispose_words (list); | |
f73dda09 | 4894 | last_command_exit_value = last_exit_value; |
ccc6cda3 JA |
4895 | } |
4896 | else | |
4897 | { | |
4898 | t = dequote_string (result); | |
4899 | free (result); | |
4900 | result = t; | |
4901 | } | |
4902 | ||
4903 | dstack = save_dstack; | |
726f6388 JA |
4904 | |
4905 | return (result); | |
4906 | } | |
4907 | ||
7117c2d2 JA |
4908 | /************************************************ |
4909 | * * | |
4910 | * ERROR HANDLING * | |
4911 | * * | |
4912 | ************************************************/ | |
4913 | ||
726f6388 JA |
4914 | /* Report a syntax error, and restart the parser. Call here for fatal |
4915 | errors. */ | |
ccc6cda3 | 4916 | int |
f73dda09 JA |
4917 | yyerror (msg) |
4918 | const char *msg; | |
726f6388 JA |
4919 | { |
4920 | report_syntax_error ((char *)NULL); | |
4921 | reset_parser (); | |
ccc6cda3 | 4922 | return (0); |
726f6388 JA |
4923 | } |
4924 | ||
7117c2d2 | 4925 | static char * |
d3ad40de CR |
4926 | error_token_from_token (tok) |
4927 | int tok; | |
7117c2d2 JA |
4928 | { |
4929 | char *t; | |
4930 | ||
d3ad40de | 4931 | if (t = find_token_in_alist (tok, word_token_alist, 0)) |
7117c2d2 JA |
4932 | return t; |
4933 | ||
d3ad40de | 4934 | if (t = find_token_in_alist (tok, other_token_alist, 0)) |
7117c2d2 JA |
4935 | return t; |
4936 | ||
4937 | t = (char *)NULL; | |
4938 | /* This stuff is dicy and needs closer inspection */ | |
4939 | switch (current_token) | |
4940 | { | |
4941 | case WORD: | |
4942 | case ASSIGNMENT_WORD: | |
4943 | if (yylval.word) | |
4944 | t = savestring (yylval.word->word); | |
4945 | break; | |
4946 | case NUMBER: | |
4947 | t = itos (yylval.number); | |
4948 | break; | |
4949 | case ARITH_CMD: | |
4950 | if (yylval.word_list) | |
4951 | t = string_list (yylval.word_list); | |
4952 | break; | |
4953 | case ARITH_FOR_EXPRS: | |
4954 | if (yylval.word_list) | |
4955 | t = string_list_internal (yylval.word_list, " ; "); | |
4956 | break; | |
4957 | case COND_CMD: | |
4958 | t = (char *)NULL; /* punt */ | |
4959 | break; | |
4960 | } | |
4961 | ||
4962 | return t; | |
4963 | } | |
4964 | ||
4965 | static char * | |
4966 | error_token_from_text () | |
4967 | { | |
4968 | char *msg, *t; | |
4969 | int token_end, i; | |
4970 | ||
4971 | t = shell_input_line; | |
4972 | i = shell_input_line_index; | |
4973 | token_end = 0; | |
4974 | msg = (char *)NULL; | |
4975 | ||
4976 | if (i && t[i] == '\0') | |
4977 | i--; | |
4978 | ||
4979 | while (i && (whitespace (t[i]) || t[i] == '\n')) | |
4980 | i--; | |
4981 | ||
4982 | if (i) | |
4983 | token_end = i + 1; | |
4984 | ||
4985 | while (i && (member (t[i], " \n\t;|&") == 0)) | |
4986 | i--; | |
4987 | ||
4988 | while (i != token_end && (whitespace (t[i]) || t[i] == '\n')) | |
4989 | i++; | |
4990 | ||
4991 | /* Return our idea of the offending token. */ | |
4992 | if (token_end || (i == 0 && token_end == 0)) | |
4993 | { | |
4994 | if (token_end) | |
4995 | msg = substring (t, i, token_end); | |
4996 | else /* one-character token */ | |
4997 | { | |
4998 | msg = (char *)xmalloc (2); | |
4999 | msg[0] = t[i]; | |
5000 | msg[1] = '\0'; | |
5001 | } | |
5002 | } | |
5003 | ||
5004 | return (msg); | |
5005 | } | |
5006 | ||
5007 | static void | |
5008 | print_offending_line () | |
5009 | { | |
5010 | char *msg; | |
5011 | int token_end; | |
5012 | ||
5013 | msg = savestring (shell_input_line); | |
5014 | token_end = strlen (msg); | |
5015 | while (token_end && msg[token_end - 1] == '\n') | |
5016 | msg[--token_end] = '\0'; | |
5017 | ||
5018 | parser_error (line_number, "`%s'", msg); | |
5019 | free (msg); | |
5020 | } | |
5021 | ||
726f6388 JA |
5022 | /* Report a syntax error with line numbers, etc. |
5023 | Call here for recoverable errors. If you have a message to print, | |
5024 | then place it in MESSAGE, otherwise pass NULL and this will figure | |
5025 | out an appropriate message for you. */ | |
5026 | static void | |
5027 | report_syntax_error (message) | |
5028 | char *message; | |
5029 | { | |
7117c2d2 | 5030 | char *msg; |
ccc6cda3 | 5031 | |
726f6388 JA |
5032 | if (message) |
5033 | { | |
ccc6cda3 JA |
5034 | parser_error (line_number, "%s", message); |
5035 | if (interactive && EOF_Reached) | |
5036 | EOF_Reached = 0; | |
726f6388 JA |
5037 | last_command_exit_value = EX_USAGE; |
5038 | return; | |
5039 | } | |
5040 | ||
ccc6cda3 | 5041 | /* If the line of input we're reading is not null, try to find the |
7117c2d2 JA |
5042 | objectionable token. First, try to figure out what token the |
5043 | parser's complaining about by looking at current_token. */ | |
5044 | if (current_token != 0 && EOF_Reached == 0 && (msg = error_token_from_token (current_token))) | |
726f6388 | 5045 | { |
5e13499c | 5046 | parser_error (line_number, _("syntax error near unexpected token `%s'"), msg); |
7117c2d2 | 5047 | free (msg); |
726f6388 | 5048 | |
7117c2d2 JA |
5049 | if (interactive == 0) |
5050 | print_offending_line (); | |
726f6388 | 5051 | |
7117c2d2 JA |
5052 | last_command_exit_value = EX_USAGE; |
5053 | return; | |
5054 | } | |
726f6388 | 5055 | |
7117c2d2 JA |
5056 | /* If looking at the current token doesn't prove fruitful, try to find the |
5057 | offending token by analyzing the text of the input line near the current | |
5058 | input line index and report what we find. */ | |
5059 | if (shell_input_line && *shell_input_line) | |
5060 | { | |
5061 | msg = error_token_from_text (); | |
5062 | if (msg) | |
726f6388 | 5063 | { |
5e13499c | 5064 | parser_error (line_number, _("syntax error near `%s'"), msg); |
7117c2d2 | 5065 | free (msg); |
726f6388 JA |
5066 | } |
5067 | ||
ccc6cda3 JA |
5068 | /* If not interactive, print the line containing the error. */ |
5069 | if (interactive == 0) | |
7117c2d2 | 5070 | print_offending_line (); |
726f6388 JA |
5071 | } |
5072 | else | |
5073 | { | |
5e13499c | 5074 | msg = EOF_Reached ? _("syntax error: unexpected end of file") : _("syntax error"); |
ccc6cda3 JA |
5075 | parser_error (line_number, "%s", msg); |
5076 | /* When the shell is interactive, this file uses EOF_Reached | |
5077 | only for error reporting. Other mechanisms are used to | |
5078 | decide whether or not to exit. */ | |
5079 | if (interactive && EOF_Reached) | |
5080 | EOF_Reached = 0; | |
726f6388 | 5081 | } |
7117c2d2 | 5082 | |
726f6388 JA |
5083 | last_command_exit_value = EX_USAGE; |
5084 | } | |
5085 | ||
5086 | /* ??? Needed function. ??? We have to be able to discard the constructs | |
5087 | created during parsing. In the case of error, we want to return | |
5088 | allocated objects to the memory pool. In the case of no error, we want | |
5089 | to throw away the information about where the allocated objects live. | |
7117c2d2 | 5090 | (dispose_command () will actually free the command.) */ |
ccc6cda3 | 5091 | static void |
726f6388 JA |
5092 | discard_parser_constructs (error_p) |
5093 | int error_p; | |
5094 | { | |
5095 | } | |
ccc6cda3 | 5096 | |
7117c2d2 JA |
5097 | /************************************************ |
5098 | * * | |
5099 | * EOF HANDLING * | |
5100 | * * | |
5101 | ************************************************/ | |
5102 | ||
726f6388 JA |
5103 | /* Do that silly `type "bye" to exit' stuff. You know, "ignoreeof". */ |
5104 | ||
5105 | /* A flag denoting whether or not ignoreeof is set. */ | |
5106 | int ignoreeof = 0; | |
5107 | ||
5108 | /* The number of times that we have encountered an EOF character without | |
5109 | another character intervening. When this gets above the limit, the | |
5110 | shell terminates. */ | |
5111 | int eof_encountered = 0; | |
5112 | ||
5113 | /* The limit for eof_encountered. */ | |
5114 | int eof_encountered_limit = 10; | |
5115 | ||
5116 | /* If we have EOF as the only input unit, this user wants to leave | |
5117 | the shell. If the shell is not interactive, then just leave. | |
5118 | Otherwise, if ignoreeof is set, and we haven't done this the | |
5119 | required number of times in a row, print a message. */ | |
5120 | static void | |
5121 | handle_eof_input_unit () | |
5122 | { | |
5123 | if (interactive) | |
5124 | { | |
5125 | /* shell.c may use this to decide whether or not to write out the | |
5126 | history, among other things. We use it only for error reporting | |
5127 | in this file. */ | |
5128 | if (EOF_Reached) | |
5129 | EOF_Reached = 0; | |
5130 | ||
5131 | /* If the user wants to "ignore" eof, then let her do so, kind of. */ | |
5132 | if (ignoreeof) | |
5133 | { | |
5134 | if (eof_encountered < eof_encountered_limit) | |
5135 | { | |
5e13499c | 5136 | fprintf (stderr, _("Use \"%s\" to leave the shell.\n"), |
726f6388 JA |
5137 | login_shell ? "logout" : "exit"); |
5138 | eof_encountered++; | |
7117c2d2 JA |
5139 | /* Reset the parsing state. */ |
5140 | last_read_token = current_token = '\n'; | |
726f6388 JA |
5141 | /* Reset the prompt string to be $PS1. */ |
5142 | prompt_string_pointer = (char **)NULL; | |
5143 | prompt_again (); | |
726f6388 | 5144 | return; |
ccc6cda3 | 5145 | } |
726f6388 JA |
5146 | } |
5147 | ||
5148 | /* In this case EOF should exit the shell. Do it now. */ | |
5149 | reset_parser (); | |
5150 | exit_builtin ((WORD_LIST *)NULL); | |
5151 | } | |
5152 | else | |
5153 | { | |
5154 | /* We don't write history files, etc., for non-interactive shells. */ | |
5155 | EOF_Reached = 1; | |
5156 | } | |
5157 | } | |
bb70624e | 5158 | |
7117c2d2 JA |
5159 | /************************************************ |
5160 | * * | |
5161 | * STRING PARSING FUNCTIONS * | |
5162 | * * | |
5163 | ************************************************/ | |
5164 | ||
5165 | /* It's very important that these two functions treat the characters | |
5166 | between ( and ) identically. */ | |
5167 | ||
bb70624e JA |
5168 | static WORD_LIST parse_string_error; |
5169 | ||
5170 | /* Take a string and run it through the shell parser, returning the | |
5171 | resultant word list. Used by compound array assignment. */ | |
5172 | WORD_LIST * | |
5e13499c | 5173 | parse_string_to_word_list (s, flags, whom) |
f73dda09 | 5174 | char *s; |
5e13499c | 5175 | int flags; |
f73dda09 | 5176 | const char *whom; |
bb70624e JA |
5177 | { |
5178 | WORD_LIST *wl; | |
7117c2d2 | 5179 | int tok, orig_current_token, orig_line_number, orig_input_terminator; |
28ef6c31 | 5180 | int orig_line_count; |
7117c2d2 | 5181 | int old_echo_input, old_expand_aliases; |
bb70624e JA |
5182 | #if defined (HISTORY) |
5183 | int old_remember_on_history, old_history_expansion_inhibited; | |
5184 | #endif | |
5185 | ||
5186 | #if defined (HISTORY) | |
5187 | old_remember_on_history = remember_on_history; | |
5188 | # if defined (BANG_HISTORY) | |
5189 | old_history_expansion_inhibited = history_expansion_inhibited; | |
5190 | # endif | |
5191 | bash_history_disable (); | |
5192 | #endif | |
5193 | ||
5194 | orig_line_number = line_number; | |
28ef6c31 | 5195 | orig_line_count = current_command_line_count; |
bb70624e | 5196 | orig_input_terminator = shell_input_line_terminator; |
7117c2d2 JA |
5197 | old_echo_input = echo_input_at_read; |
5198 | old_expand_aliases = expand_aliases; | |
bb70624e JA |
5199 | |
5200 | push_stream (1); | |
7117c2d2 | 5201 | last_read_token = WORD; /* WORD to allow reserved words here */ |
28ef6c31 | 5202 | current_command_line_count = 0; |
7117c2d2 | 5203 | echo_input_at_read = expand_aliases = 0; |
bb70624e JA |
5204 | |
5205 | with_input_from_string (s, whom); | |
5206 | wl = (WORD_LIST *)NULL; | |
5e13499c CR |
5207 | |
5208 | if (flags & 1) | |
5209 | parser_state |= PST_COMPASSIGN; | |
5210 | ||
bb70624e JA |
5211 | while ((tok = read_token (READ)) != yacc_EOF) |
5212 | { | |
5213 | if (tok == '\n' && *bash_input.location.string == '\0') | |
5214 | break; | |
28ef6c31 JA |
5215 | if (tok == '\n') /* Allow newlines in compound assignments */ |
5216 | continue; | |
bb70624e JA |
5217 | if (tok != WORD && tok != ASSIGNMENT_WORD) |
5218 | { | |
5219 | line_number = orig_line_number + line_number - 1; | |
7117c2d2 JA |
5220 | orig_current_token = current_token; |
5221 | current_token = tok; | |
9607141c | 5222 | yyerror (NULL); /* does the right thing */ |
7117c2d2 | 5223 | current_token = orig_current_token; |
bb70624e JA |
5224 | if (wl) |
5225 | dispose_words (wl); | |
5226 | wl = &parse_string_error; | |
5227 | break; | |
5228 | } | |
5229 | wl = make_word_list (yylval.word, wl); | |
5230 | } | |
5231 | ||
5232 | last_read_token = '\n'; | |
5233 | pop_stream (); | |
5234 | ||
5235 | #if defined (HISTORY) | |
5236 | remember_on_history = old_remember_on_history; | |
5237 | # if defined (BANG_HISTORY) | |
5238 | history_expansion_inhibited = old_history_expansion_inhibited; | |
5239 | # endif /* BANG_HISTORY */ | |
5240 | #endif /* HISTORY */ | |
5241 | ||
7117c2d2 JA |
5242 | echo_input_at_read = old_echo_input; |
5243 | expand_aliases = old_expand_aliases; | |
5244 | ||
28ef6c31 | 5245 | current_command_line_count = orig_line_count; |
bb70624e JA |
5246 | shell_input_line_terminator = orig_input_terminator; |
5247 | ||
5e13499c CR |
5248 | if (flags & 1) |
5249 | parser_state &= ~PST_COMPASSIGN; | |
5250 | ||
bb70624e JA |
5251 | if (wl == &parse_string_error) |
5252 | { | |
5253 | last_command_exit_value = EXECUTION_FAILURE; | |
5254 | if (interactive_shell == 0 && posixly_correct) | |
5255 | jump_to_top_level (FORCE_EOF); | |
5256 | else | |
5257 | jump_to_top_level (DISCARD); | |
5258 | } | |
5259 | ||
5260 | return (REVERSE_LIST (wl, WORD_LIST *)); | |
5261 | } | |
7117c2d2 JA |
5262 | |
5263 | static char * | |
5264 | parse_compound_assignment (retlenp) | |
5265 | int *retlenp; | |
5266 | { | |
5267 | WORD_LIST *wl, *rl; | |
5e4a95c7 | 5268 | int tok, orig_line_number, orig_token_size, orig_last_token, assignok; |
7117c2d2 JA |
5269 | char *saved_token, *ret; |
5270 | ||
5271 | saved_token = token; | |
5272 | orig_token_size = token_buffer_size; | |
5273 | orig_line_number = line_number; | |
5e4a95c7 | 5274 | orig_last_token = last_read_token; |
7117c2d2 JA |
5275 | |
5276 | last_read_token = WORD; /* WORD to allow reserved words here */ | |
5277 | ||
5278 | token = (char *)NULL; | |
5279 | token_buffer_size = 0; | |
5280 | ||
5e4a95c7 CR |
5281 | assignok = parser_state&PST_ASSIGNOK; /* XXX */ |
5282 | ||
7117c2d2 | 5283 | wl = (WORD_LIST *)NULL; /* ( */ |
5e13499c CR |
5284 | parser_state |= PST_COMPASSIGN; |
5285 | ||
7117c2d2 JA |
5286 | while ((tok = read_token (READ)) != ')') |
5287 | { | |
5288 | if (tok == '\n') /* Allow newlines in compound assignments */ | |
5e13499c CR |
5289 | { |
5290 | if (SHOULD_PROMPT ()) | |
5291 | prompt_again (); | |
5292 | continue; | |
5293 | } | |
7117c2d2 JA |
5294 | if (tok != WORD && tok != ASSIGNMENT_WORD) |
5295 | { | |
5296 | current_token = tok; /* for error reporting */ | |
5297 | if (tok == yacc_EOF) /* ( */ | |
5e13499c | 5298 | parser_error (orig_line_number, _("unexpected EOF while looking for matching `)'")); |
7117c2d2 | 5299 | else |
9607141c | 5300 | yyerror(NULL); /* does the right thing */ |
7117c2d2 JA |
5301 | if (wl) |
5302 | dispose_words (wl); | |
5303 | wl = &parse_string_error; | |
5304 | break; | |
5305 | } | |
5306 | wl = make_word_list (yylval.word, wl); | |
5307 | } | |
5308 | ||
5309 | FREE (token); | |
5310 | token = saved_token; | |
5311 | token_buffer_size = orig_token_size; | |
5312 | ||
5e13499c CR |
5313 | parser_state &= ~PST_COMPASSIGN; |
5314 | ||
7117c2d2 JA |
5315 | if (wl == &parse_string_error) |
5316 | { | |
5317 | last_command_exit_value = EXECUTION_FAILURE; | |
5318 | last_read_token = '\n'; /* XXX */ | |
5319 | if (interactive_shell == 0 && posixly_correct) | |
5320 | jump_to_top_level (FORCE_EOF); | |
5321 | else | |
5322 | jump_to_top_level (DISCARD); | |
5323 | } | |
5324 | ||
5e4a95c7 | 5325 | last_read_token = orig_last_token; /* XXX - was WORD? */ |
dc8fbaf9 | 5326 | |
7117c2d2 JA |
5327 | if (wl) |
5328 | { | |
5329 | rl = REVERSE_LIST (wl, WORD_LIST *); | |
5330 | ret = string_list (rl); | |
5331 | dispose_words (rl); | |
5332 | } | |
5333 | else | |
5334 | ret = (char *)NULL; | |
5335 | ||
5336 | if (retlenp) | |
5337 | *retlenp = (ret && *ret) ? strlen (ret) : 0; | |
5e4a95c7 CR |
5338 | |
5339 | if (assignok) | |
5340 | parser_state |= PST_ASSIGNOK; | |
5341 | ||
7117c2d2 JA |
5342 | return ret; |
5343 | } | |
5344 | ||
d3a24ed2 CR |
5345 | /************************************************ |
5346 | * * | |
5347 | * SAVING AND RESTORING PARTIAL PARSE STATE * | |
5348 | * * | |
5349 | ************************************************/ | |
5350 | ||
5351 | sh_parser_state_t * | |
5352 | save_parser_state (ps) | |
5353 | sh_parser_state_t *ps; | |
5354 | { | |
5355 | #if defined (ARRAY_VARS) | |
5356 | SHELL_VAR *v; | |
5357 | #endif | |
5358 | ||
5359 | if (ps == 0) | |
9607141c | 5360 | ps = (sh_parser_state_t *)xmalloc (sizeof (sh_parser_state_t)); |
d3a24ed2 CR |
5361 | if (ps == 0) |
5362 | return ((sh_parser_state_t *)NULL); | |
5363 | ||
5364 | ps->parser_state = parser_state; | |
5365 | ps->token_state = save_token_state (); | |
5366 | ||
5367 | ps->input_line_terminator = shell_input_line_terminator; | |
5368 | ps->eof_encountered = eof_encountered; | |
5369 | ||
5370 | ps->current_command_line_count = current_command_line_count; | |
5371 | ||
5372 | #if defined (HISTORY) | |
5373 | ps->remember_on_history = remember_on_history; | |
5374 | # if defined (BANG_HISTORY) | |
5375 | ps->history_expansion_inhibited = history_expansion_inhibited; | |
5376 | # endif | |
5377 | #endif | |
5378 | ||
5379 | ps->last_command_exit_value = last_command_exit_value; | |
5380 | #if defined (ARRAY_VARS) | |
5381 | v = find_variable ("PIPESTATUS"); | |
5382 | if (v && array_p (v) && array_cell (v)) | |
5383 | ps->pipestatus = array_copy (array_cell (v)); | |
5384 | else | |
5385 | ps->pipestatus = (ARRAY *)NULL; | |
5386 | #endif | |
5387 | ||
5388 | ps->last_shell_builtin = last_shell_builtin; | |
5389 | ps->this_shell_builtin = this_shell_builtin; | |
5390 | ||
5391 | ps->expand_aliases = expand_aliases; | |
5392 | ps->echo_input_at_read = echo_input_at_read; | |
5393 | ||
5394 | return (ps); | |
5395 | } | |
5396 | ||
5397 | void | |
5398 | restore_parser_state (ps) | |
5399 | sh_parser_state_t *ps; | |
5400 | { | |
5401 | #if defined (ARRAY_VARS) | |
5402 | SHELL_VAR *v; | |
5403 | #endif | |
5404 | ||
5405 | if (ps == 0) | |
5406 | return; | |
5407 | ||
5408 | parser_state = ps->parser_state; | |
5409 | if (ps->token_state) | |
5410 | { | |
5411 | restore_token_state (ps->token_state); | |
5412 | free (ps->token_state); | |
5413 | } | |
5414 | ||
5415 | shell_input_line_terminator = ps->input_line_terminator; | |
5416 | eof_encountered = ps->eof_encountered; | |
5417 | ||
5418 | current_command_line_count = ps->current_command_line_count; | |
5419 | ||
5420 | #if defined (HISTORY) | |
5421 | remember_on_history = ps->remember_on_history; | |
5422 | # if defined (BANG_HISTORY) | |
5423 | history_expansion_inhibited = ps->history_expansion_inhibited; | |
5424 | # endif | |
5425 | #endif | |
5426 | ||
5427 | last_command_exit_value = ps->last_command_exit_value; | |
5428 | #if defined (ARRAY_VARS) | |
5429 | v = find_variable ("PIPESTATUS"); | |
5430 | if (v && array_p (v) && array_cell (v)) | |
5431 | { | |
5432 | array_dispose (array_cell (v)); | |
5433 | var_setarray (v, ps->pipestatus); | |
5434 | } | |
5435 | #endif | |
5436 | ||
5437 | last_shell_builtin = ps->last_shell_builtin; | |
5438 | this_shell_builtin = ps->this_shell_builtin; | |
5439 | ||
5440 | expand_aliases = ps->expand_aliases; | |
5441 | echo_input_at_read = ps->echo_input_at_read; | |
5442 | } | |
5443 | ||
7117c2d2 JA |
5444 | /************************************************ |
5445 | * * | |
5446 | * MULTIBYTE CHARACTER HANDLING * | |
5447 | * * | |
5448 | ************************************************/ | |
5449 | ||
5450 | #if defined (HANDLE_MULTIBYTE) | |
5451 | static void | |
5452 | set_line_mbstate () | |
5453 | { | |
d3a24ed2 | 5454 | int i, previ, len, c; |
7117c2d2 JA |
5455 | mbstate_t mbs, prevs; |
5456 | size_t mbclen; | |
5457 | ||
5458 | if (shell_input_line == NULL) | |
5459 | return; | |
5460 | len = strlen (shell_input_line); /* XXX - shell_input_line_len ? */ | |
5461 | FREE (shell_input_line_property); | |
5462 | shell_input_line_property = (char *)xmalloc (len + 1); | |
5463 | ||
5464 | memset (&prevs, '\0', sizeof (mbstate_t)); | |
5465 | for (i = previ = 0; i < len; i++) | |
5466 | { | |
5467 | mbs = prevs; | |
5468 | ||
d3a24ed2 CR |
5469 | c = shell_input_line[i]; |
5470 | if (c == EOF) | |
7117c2d2 JA |
5471 | { |
5472 | int j; | |
5473 | for (j = i; j < len; j++) | |
5474 | shell_input_line_property[j] = 1; | |
5475 | break; | |
5476 | } | |
5477 | ||
5478 | mbclen = mbrlen (shell_input_line + previ, i - previ + 1, &mbs); | |
5479 | if (mbclen == 1 || mbclen == (size_t)-1) | |
5480 | { | |
5481 | mbclen = 1; | |
5482 | previ = i + 1; | |
5483 | } | |
5484 | else if (mbclen == (size_t)-2) | |
5485 | mbclen = 0; | |
5486 | else if (mbclen > 1) | |
5487 | { | |
5488 | mbclen = 0; | |
5489 | previ = i + 1; | |
5490 | prevs = mbs; | |
5491 | } | |
5492 | else | |
5493 | { | |
d3a24ed2 CR |
5494 | /* XXX - what to do if mbrlen returns 0? (null wide character) */ |
5495 | int j; | |
5496 | for (j = i; j < len; j++) | |
5497 | shell_input_line_property[j] = 1; | |
5498 | break; | |
7117c2d2 JA |
5499 | } |
5500 | ||
5501 | shell_input_line_property[i] = mbclen; | |
5502 | } | |
5503 | } | |
5504 | #endif /* HANDLE_MULTIBYTE */ |