Commit | Line | Data |
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d60d9f65 SS |
1 | /* histexpand.c -- history expansion. */ |
2 | ||
cb41b9e7 | 3 | /* Copyright (C) 1989-2018 Free Software Foundation, Inc. |
d60d9f65 | 4 | |
cc88a640 | 5 | This file contains the GNU History Library (History), a set of |
d60d9f65 SS |
6 | routines for managing the text of previously typed lines. |
7 | ||
cc88a640 | 8 | History is free software: you can redistribute it and/or modify |
d60d9f65 | 9 | it under the terms of the GNU General Public License as published by |
cc88a640 JK |
10 | the Free Software Foundation, either version 3 of the License, or |
11 | (at your option) any later version. | |
d60d9f65 | 12 | |
cc88a640 JK |
13 | History is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
d60d9f65 | 17 | |
cc88a640 JK |
18 | You should have received a copy of the GNU General Public License |
19 | along with History. If not, see <http://www.gnu.org/licenses/>. | |
20 | */ | |
d60d9f65 SS |
21 | |
22 | #define READLINE_LIBRARY | |
23 | ||
24 | #if defined (HAVE_CONFIG_H) | |
25 | # include <config.h> | |
26 | #endif | |
27 | ||
28 | #include <stdio.h> | |
29 | ||
30 | #if defined (HAVE_STDLIB_H) | |
31 | # include <stdlib.h> | |
32 | #else | |
33 | # include "ansi_stdlib.h" | |
34 | #endif /* HAVE_STDLIB_H */ | |
35 | ||
36 | #if defined (HAVE_UNISTD_H) | |
37 | # ifndef _MINIX | |
38 | # include <sys/types.h> | |
39 | # endif | |
40 | # include <unistd.h> | |
41 | #endif | |
42 | ||
9255ee31 | 43 | #include "rlmbutil.h" |
d60d9f65 SS |
44 | |
45 | #include "history.h" | |
46 | #include "histlib.h" | |
775e241e | 47 | #include "chardefs.h" |
d60d9f65 | 48 | |
1b17e766 EZ |
49 | #include "rlshell.h" |
50 | #include "xmalloc.h" | |
51 | ||
d60d9f65 SS |
52 | #define HISTORY_WORD_DELIMITERS " \t\n;&()|<>" |
53 | #define HISTORY_QUOTE_CHARACTERS "\"'`" | |
775e241e | 54 | #define HISTORY_EVENT_DELIMITERS "^$*%-" |
d60d9f65 | 55 | |
5bdf8622 DJ |
56 | #define slashify_in_quotes "\\`\"$" |
57 | ||
cb41b9e7 TT |
58 | #define fielddelim(c) (whitespace(c) || (c) == '\n') |
59 | ||
9255ee31 EZ |
60 | typedef int _hist_search_func_t PARAMS((const char *, int)); |
61 | ||
d60d9f65 SS |
62 | static char error_pointer; |
63 | ||
64 | static char *subst_lhs; | |
65 | static char *subst_rhs; | |
66 | static int subst_lhs_len; | |
67 | static int subst_rhs_len; | |
68 | ||
775e241e TT |
69 | /* Characters that delimit history event specifications and separate event |
70 | specifications from word designators. Static for now */ | |
71 | static char *history_event_delimiter_chars = HISTORY_EVENT_DELIMITERS; | |
72 | ||
9255ee31 | 73 | static char *get_history_word_specifier PARAMS((char *, char *, int *)); |
5bdf8622 | 74 | static int history_tokenize_word PARAMS((const char *, int)); |
cc88a640 | 75 | static char **history_tokenize_internal PARAMS((const char *, int, int *)); |
5bdf8622 | 76 | static char *history_substring PARAMS((const char *, int, int)); |
cc88a640 JK |
77 | static void freewords PARAMS((char **, int)); |
78 | static char *history_find_word PARAMS((char *, int)); | |
d60d9f65 | 79 | |
9255ee31 | 80 | static char *quote_breaks PARAMS((char *)); |
d60d9f65 SS |
81 | |
82 | /* Variables exported by this file. */ | |
83 | /* The character that represents the start of a history expansion | |
84 | request. This is usually `!'. */ | |
85 | char history_expansion_char = '!'; | |
86 | ||
87 | /* The character that invokes word substitution if found at the start of | |
88 | a line. This is usually `^'. */ | |
89 | char history_subst_char = '^'; | |
90 | ||
91 | /* During tokenization, if this character is seen as the first character | |
92 | of a word, then it, and all subsequent characters upto a newline are | |
93 | ignored. For a Bourne shell, this should be '#'. Bash special cases | |
94 | the interactive comment character to not be a comment delimiter. */ | |
95 | char history_comment_char = '\0'; | |
96 | ||
97 | /* The list of characters which inhibit the expansion of text if found | |
98 | immediately following history_expansion_char. */ | |
99 | char *history_no_expand_chars = " \t\n\r="; | |
100 | ||
101 | /* If set to a non-zero value, single quotes inhibit history expansion. | |
102 | The default is 0. */ | |
103 | int history_quotes_inhibit_expansion = 0; | |
104 | ||
9255ee31 EZ |
105 | /* Used to split words by history_tokenize_internal. */ |
106 | char *history_word_delimiters = HISTORY_WORD_DELIMITERS; | |
107 | ||
d60d9f65 SS |
108 | /* If set, this points to a function that is called to verify that a |
109 | particular history expansion should be performed. */ | |
9255ee31 | 110 | rl_linebuf_func_t *history_inhibit_expansion_function; |
d60d9f65 | 111 | |
cb41b9e7 TT |
112 | int history_quoting_state = 0; |
113 | ||
d60d9f65 SS |
114 | /* **************************************************************** */ |
115 | /* */ | |
116 | /* History Expansion */ | |
117 | /* */ | |
118 | /* **************************************************************** */ | |
119 | ||
120 | /* Hairy history expansion on text, not tokens. This is of general | |
121 | use, and thus belongs in this library. */ | |
122 | ||
123 | /* The last string searched for by a !?string? search. */ | |
124 | static char *search_string; | |
d60d9f65 SS |
125 | /* The last string matched by a !?string? search. */ |
126 | static char *search_match; | |
127 | ||
128 | /* Return the event specified at TEXT + OFFSET modifying OFFSET to | |
129 | point to after the event specifier. Just a pointer to the history | |
130 | line is returned; NULL is returned in the event of a bad specifier. | |
131 | You pass STRING with *INDEX equal to the history_expansion_char that | |
132 | begins this specification. | |
133 | DELIMITING_QUOTE is a character that is allowed to end the string | |
134 | specification for what to search for in addition to the normal | |
135 | characters `:', ` ', `\t', `\n', and sometimes `?'. | |
136 | So you might call this function like: | |
137 | line = get_history_event ("!echo:p", &index, 0); */ | |
138 | char * | |
cb41b9e7 | 139 | get_history_event (const char *string, int *caller_index, int delimiting_quote) |
d60d9f65 SS |
140 | { |
141 | register int i; | |
142 | register char c; | |
143 | HIST_ENTRY *entry; | |
144 | int which, sign, local_index, substring_okay; | |
9255ee31 | 145 | _hist_search_func_t *search_func; |
d60d9f65 SS |
146 | char *temp; |
147 | ||
148 | /* The event can be specified in a number of ways. | |
149 | ||
150 | !! the previous command | |
151 | !n command line N | |
152 | !-n current command-line minus N | |
153 | !str the most recent command starting with STR | |
154 | !?str[?] | |
155 | the most recent command containing STR | |
156 | ||
157 | All values N are determined via HISTORY_BASE. */ | |
158 | ||
159 | i = *caller_index; | |
160 | ||
161 | if (string[i] != history_expansion_char) | |
162 | return ((char *)NULL); | |
163 | ||
164 | /* Move on to the specification. */ | |
165 | i++; | |
166 | ||
167 | sign = 1; | |
168 | substring_okay = 0; | |
169 | ||
170 | #define RETURN_ENTRY(e, w) \ | |
171 | return ((e = history_get (w)) ? e->line : (char *)NULL) | |
172 | ||
173 | /* Handle !! case. */ | |
174 | if (string[i] == history_expansion_char) | |
175 | { | |
176 | i++; | |
177 | which = history_base + (history_length - 1); | |
178 | *caller_index = i; | |
179 | RETURN_ENTRY (entry, which); | |
180 | } | |
181 | ||
182 | /* Hack case of numeric line specification. */ | |
183 | if (string[i] == '-') | |
184 | { | |
185 | sign = -1; | |
186 | i++; | |
187 | } | |
188 | ||
189 | if (_rl_digit_p (string[i])) | |
190 | { | |
191 | /* Get the extent of the digits and compute the value. */ | |
192 | for (which = 0; _rl_digit_p (string[i]); i++) | |
193 | which = (which * 10) + _rl_digit_value (string[i]); | |
194 | ||
195 | *caller_index = i; | |
196 | ||
197 | if (sign < 0) | |
198 | which = (history_length + history_base) - which; | |
199 | ||
200 | RETURN_ENTRY (entry, which); | |
201 | } | |
202 | ||
203 | /* This must be something to search for. If the spec begins with | |
204 | a '?', then the string may be anywhere on the line. Otherwise, | |
205 | the string must be found at the start of a line. */ | |
206 | if (string[i] == '?') | |
207 | { | |
208 | substring_okay++; | |
209 | i++; | |
210 | } | |
211 | ||
212 | /* Only a closing `?' or a newline delimit a substring search string. */ | |
213 | for (local_index = i; c = string[i]; i++) | |
5bdf8622 | 214 | { |
9255ee31 | 215 | #if defined (HANDLE_MULTIBYTE) |
5bdf8622 DJ |
216 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) |
217 | { | |
218 | int v; | |
219 | mbstate_t ps; | |
220 | ||
221 | memset (&ps, 0, sizeof (mbstate_t)); | |
222 | /* These produce warnings because we're passing a const string to a | |
223 | function that takes a non-const string. */ | |
224 | _rl_adjust_point ((char *)string, i, &ps); | |
225 | if ((v = _rl_get_char_len ((char *)string + i, &ps)) > 1) | |
226 | { | |
227 | i += v - 1; | |
228 | continue; | |
229 | } | |
230 | } | |
9255ee31 | 231 | |
9255ee31 EZ |
232 | #endif /* HANDLE_MULTIBYTE */ |
233 | if ((!substring_okay && (whitespace (c) || c == ':' || | |
775e241e | 234 | (history_event_delimiter_chars && member (c, history_event_delimiter_chars)) || |
9255ee31 EZ |
235 | (history_search_delimiter_chars && member (c, history_search_delimiter_chars)) || |
236 | string[i] == delimiting_quote)) || | |
237 | string[i] == '\n' || | |
238 | (substring_okay && string[i] == '?')) | |
239 | break; | |
5bdf8622 | 240 | } |
d60d9f65 SS |
241 | |
242 | which = i - local_index; | |
9255ee31 | 243 | temp = (char *)xmalloc (1 + which); |
d60d9f65 SS |
244 | if (which) |
245 | strncpy (temp, string + local_index, which); | |
246 | temp[which] = '\0'; | |
247 | ||
248 | if (substring_okay && string[i] == '?') | |
249 | i++; | |
250 | ||
251 | *caller_index = i; | |
252 | ||
253 | #define FAIL_SEARCH() \ | |
254 | do { \ | |
cc88a640 | 255 | history_offset = history_length; xfree (temp) ; return (char *)NULL; \ |
d60d9f65 SS |
256 | } while (0) |
257 | ||
258 | /* If there is no search string, try to use the previous search string, | |
259 | if one exists. If not, fail immediately. */ | |
260 | if (*temp == '\0' && substring_okay) | |
261 | { | |
262 | if (search_string) | |
263 | { | |
cc88a640 | 264 | xfree (temp); |
d60d9f65 SS |
265 | temp = savestring (search_string); |
266 | } | |
267 | else | |
268 | FAIL_SEARCH (); | |
269 | } | |
270 | ||
271 | search_func = substring_okay ? history_search : history_search_prefix; | |
272 | while (1) | |
273 | { | |
274 | local_index = (*search_func) (temp, -1); | |
275 | ||
276 | if (local_index < 0) | |
277 | FAIL_SEARCH (); | |
278 | ||
279 | if (local_index == 0 || substring_okay) | |
280 | { | |
281 | entry = current_history (); | |
775e241e TT |
282 | if (entry == 0) |
283 | FAIL_SEARCH (); | |
d60d9f65 SS |
284 | history_offset = history_length; |
285 | ||
286 | /* If this was a substring search, then remember the | |
287 | string that we matched for word substitution. */ | |
288 | if (substring_okay) | |
289 | { | |
290 | FREE (search_string); | |
291 | search_string = temp; | |
292 | ||
293 | FREE (search_match); | |
294 | search_match = history_find_word (entry->line, local_index); | |
295 | } | |
296 | else | |
cc88a640 | 297 | xfree (temp); |
d60d9f65 SS |
298 | |
299 | return (entry->line); | |
300 | } | |
301 | ||
302 | if (history_offset) | |
303 | history_offset--; | |
304 | else | |
305 | FAIL_SEARCH (); | |
306 | } | |
307 | #undef FAIL_SEARCH | |
308 | #undef RETURN_ENTRY | |
309 | } | |
310 | ||
311 | /* Function for extracting single-quoted strings. Used for inhibiting | |
312 | history expansion within single quotes. */ | |
313 | ||
314 | /* Extract the contents of STRING as if it is enclosed in single quotes. | |
315 | SINDEX, when passed in, is the offset of the character immediately | |
316 | following the opening single quote; on exit, SINDEX is left pointing | |
cc88a640 JK |
317 | to the closing single quote. FLAGS currently used to allow backslash |
318 | to escape a single quote (e.g., for bash $'...'). */ | |
d60d9f65 | 319 | static void |
cb41b9e7 | 320 | hist_string_extract_single_quoted (char *string, int *sindex, int flags) |
d60d9f65 SS |
321 | { |
322 | register int i; | |
323 | ||
324 | for (i = *sindex; string[i] && string[i] != '\''; i++) | |
cc88a640 JK |
325 | { |
326 | if ((flags & 1) && string[i] == '\\' && string[i+1]) | |
327 | i++; | |
328 | } | |
d60d9f65 SS |
329 | |
330 | *sindex = i; | |
331 | } | |
332 | ||
333 | static char * | |
cb41b9e7 | 334 | quote_breaks (char *s) |
d60d9f65 SS |
335 | { |
336 | register char *p, *r; | |
337 | char *ret; | |
338 | int len = 3; | |
339 | ||
340 | for (p = s; p && *p; p++, len++) | |
341 | { | |
342 | if (*p == '\'') | |
343 | len += 3; | |
344 | else if (whitespace (*p) || *p == '\n') | |
345 | len += 2; | |
346 | } | |
347 | ||
9255ee31 | 348 | r = ret = (char *)xmalloc (len); |
d60d9f65 SS |
349 | *r++ = '\''; |
350 | for (p = s; p && *p; ) | |
351 | { | |
352 | if (*p == '\'') | |
353 | { | |
354 | *r++ = '\''; | |
355 | *r++ = '\\'; | |
356 | *r++ = '\''; | |
357 | *r++ = '\''; | |
358 | p++; | |
359 | } | |
360 | else if (whitespace (*p) || *p == '\n') | |
361 | { | |
362 | *r++ = '\''; | |
363 | *r++ = *p++; | |
364 | *r++ = '\''; | |
365 | } | |
366 | else | |
367 | *r++ = *p++; | |
368 | } | |
369 | *r++ = '\''; | |
370 | *r = '\0'; | |
371 | return ret; | |
372 | } | |
373 | ||
374 | static char * | |
cb41b9e7 | 375 | hist_error(char *s, int start, int current, int errtype) |
d60d9f65 | 376 | { |
9255ee31 EZ |
377 | char *temp; |
378 | const char *emsg; | |
d60d9f65 SS |
379 | int ll, elen; |
380 | ||
381 | ll = current - start; | |
382 | ||
383 | switch (errtype) | |
384 | { | |
385 | case EVENT_NOT_FOUND: | |
386 | emsg = "event not found"; | |
387 | elen = 15; | |
388 | break; | |
389 | case BAD_WORD_SPEC: | |
390 | emsg = "bad word specifier"; | |
391 | elen = 18; | |
392 | break; | |
393 | case SUBST_FAILED: | |
394 | emsg = "substitution failed"; | |
395 | elen = 19; | |
396 | break; | |
397 | case BAD_MODIFIER: | |
398 | emsg = "unrecognized history modifier"; | |
399 | elen = 29; | |
400 | break; | |
c862e87b JM |
401 | case NO_PREV_SUBST: |
402 | emsg = "no previous substitution"; | |
403 | elen = 24; | |
404 | break; | |
d60d9f65 SS |
405 | default: |
406 | emsg = "unknown expansion error"; | |
407 | elen = 23; | |
408 | break; | |
409 | } | |
410 | ||
9255ee31 | 411 | temp = (char *)xmalloc (ll + elen + 3); |
d60d9f65 SS |
412 | strncpy (temp, s + start, ll); |
413 | temp[ll] = ':'; | |
414 | temp[ll + 1] = ' '; | |
415 | strcpy (temp + ll + 2, emsg); | |
416 | return (temp); | |
417 | } | |
418 | ||
419 | /* Get a history substitution string from STR starting at *IPTR | |
420 | and return it. The length is returned in LENPTR. | |
421 | ||
422 | A backslash can quote the delimiter. If the string is the | |
423 | empty string, the previous pattern is used. If there is | |
424 | no previous pattern for the lhs, the last history search | |
425 | string is used. | |
426 | ||
427 | If IS_RHS is 1, we ignore empty strings and set the pattern | |
428 | to "" anyway. subst_lhs is not changed if the lhs is empty; | |
429 | subst_rhs is allowed to be set to the empty string. */ | |
430 | ||
431 | static char * | |
cb41b9e7 | 432 | get_subst_pattern (char *str, int *iptr, int delimiter, int is_rhs, int *lenptr) |
d60d9f65 SS |
433 | { |
434 | register int si, i, j, k; | |
9255ee31 EZ |
435 | char *s; |
436 | #if defined (HANDLE_MULTIBYTE) | |
437 | mbstate_t ps; | |
438 | #endif | |
d60d9f65 | 439 | |
9255ee31 | 440 | s = (char *)NULL; |
d60d9f65 SS |
441 | i = *iptr; |
442 | ||
9255ee31 EZ |
443 | #if defined (HANDLE_MULTIBYTE) |
444 | memset (&ps, 0, sizeof (mbstate_t)); | |
445 | _rl_adjust_point (str, i, &ps); | |
446 | #endif | |
447 | ||
d60d9f65 | 448 | for (si = i; str[si] && str[si] != delimiter; si++) |
9255ee31 EZ |
449 | #if defined (HANDLE_MULTIBYTE) |
450 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
451 | { | |
452 | int v; | |
453 | if ((v = _rl_get_char_len (str + si, &ps)) > 1) | |
454 | si += v - 1; | |
455 | else if (str[si] == '\\' && str[si + 1] == delimiter) | |
456 | si++; | |
457 | } | |
458 | else | |
459 | #endif /* HANDLE_MULTIBYTE */ | |
460 | if (str[si] == '\\' && str[si + 1] == delimiter) | |
461 | si++; | |
d60d9f65 SS |
462 | |
463 | if (si > i || is_rhs) | |
464 | { | |
9255ee31 | 465 | s = (char *)xmalloc (si - i + 1); |
d60d9f65 SS |
466 | for (j = 0, k = i; k < si; j++, k++) |
467 | { | |
468 | /* Remove a backslash quoting the search string delimiter. */ | |
469 | if (str[k] == '\\' && str[k + 1] == delimiter) | |
470 | k++; | |
471 | s[j] = str[k]; | |
472 | } | |
473 | s[j] = '\0'; | |
474 | if (lenptr) | |
475 | *lenptr = j; | |
476 | } | |
477 | ||
478 | i = si; | |
479 | if (str[i]) | |
480 | i++; | |
481 | *iptr = i; | |
482 | ||
483 | return s; | |
484 | } | |
485 | ||
486 | static void | |
cb41b9e7 | 487 | postproc_subst_rhs (void) |
d60d9f65 SS |
488 | { |
489 | char *new; | |
490 | int i, j, new_size; | |
491 | ||
9255ee31 | 492 | new = (char *)xmalloc (new_size = subst_rhs_len + subst_lhs_len); |
d60d9f65 SS |
493 | for (i = j = 0; i < subst_rhs_len; i++) |
494 | { | |
495 | if (subst_rhs[i] == '&') | |
496 | { | |
497 | if (j + subst_lhs_len >= new_size) | |
9255ee31 | 498 | new = (char *)xrealloc (new, (new_size = new_size * 2 + subst_lhs_len)); |
d60d9f65 SS |
499 | strcpy (new + j, subst_lhs); |
500 | j += subst_lhs_len; | |
501 | } | |
502 | else | |
503 | { | |
504 | /* a single backslash protects the `&' from lhs interpolation */ | |
505 | if (subst_rhs[i] == '\\' && subst_rhs[i + 1] == '&') | |
506 | i++; | |
507 | if (j >= new_size) | |
9255ee31 | 508 | new = (char *)xrealloc (new, new_size *= 2); |
d60d9f65 SS |
509 | new[j++] = subst_rhs[i]; |
510 | } | |
511 | } | |
512 | new[j] = '\0'; | |
cc88a640 | 513 | xfree (subst_rhs); |
d60d9f65 SS |
514 | subst_rhs = new; |
515 | subst_rhs_len = j; | |
516 | } | |
517 | ||
518 | /* Expand the bulk of a history specifier starting at STRING[START]. | |
519 | Returns 0 if everything is OK, -1 if an error occurred, and 1 | |
520 | if the `p' modifier was supplied and the caller should just print | |
521 | the returned string. Returns the new index into string in | |
522 | *END_INDEX_PTR, and the expanded specifier in *RET_STRING. */ | |
cb41b9e7 | 523 | /* need current line for !# */ |
d60d9f65 | 524 | static int |
cb41b9e7 | 525 | history_expand_internal (char *string, int start, int qc, int *end_index_ptr, char **ret_string, char *current_line) |
d60d9f65 SS |
526 | { |
527 | int i, n, starting_index; | |
5bdf8622 | 528 | int substitute_globally, subst_bywords, want_quotes, print_only; |
d60d9f65 SS |
529 | char *event, *temp, *result, *tstr, *t, c, *word_spec; |
530 | int result_len; | |
9255ee31 EZ |
531 | #if defined (HANDLE_MULTIBYTE) |
532 | mbstate_t ps; | |
533 | ||
534 | memset (&ps, 0, sizeof (mbstate_t)); | |
535 | #endif | |
d60d9f65 | 536 | |
9255ee31 | 537 | result = (char *)xmalloc (result_len = 128); |
d60d9f65 SS |
538 | |
539 | i = start; | |
540 | ||
541 | /* If it is followed by something that starts a word specifier, | |
542 | then !! is implied as the event specifier. */ | |
543 | ||
544 | if (member (string[i + 1], ":$*%^")) | |
545 | { | |
546 | char fake_s[3]; | |
547 | int fake_i = 0; | |
548 | i++; | |
549 | fake_s[0] = fake_s[1] = history_expansion_char; | |
550 | fake_s[2] = '\0'; | |
551 | event = get_history_event (fake_s, &fake_i, 0); | |
552 | } | |
553 | else if (string[i + 1] == '#') | |
554 | { | |
555 | i += 2; | |
556 | event = current_line; | |
557 | } | |
558 | else | |
775e241e | 559 | event = get_history_event (string, &i, qc); |
d60d9f65 SS |
560 | |
561 | if (event == 0) | |
562 | { | |
563 | *ret_string = hist_error (string, start, i, EVENT_NOT_FOUND); | |
cc88a640 | 564 | xfree (result); |
d60d9f65 SS |
565 | return (-1); |
566 | } | |
567 | ||
568 | /* If a word specifier is found, then do what that requires. */ | |
569 | starting_index = i; | |
570 | word_spec = get_history_word_specifier (string, event, &i); | |
571 | ||
572 | /* There is no such thing as a `malformed word specifier'. However, | |
573 | it is possible for a specifier that has no match. In that case, | |
574 | we complain. */ | |
575 | if (word_spec == (char *)&error_pointer) | |
576 | { | |
577 | *ret_string = hist_error (string, starting_index, i, BAD_WORD_SPEC); | |
cc88a640 | 578 | xfree (result); |
d60d9f65 SS |
579 | return (-1); |
580 | } | |
581 | ||
582 | /* If no word specifier, than the thing of interest was the event. */ | |
583 | temp = word_spec ? savestring (word_spec) : savestring (event); | |
584 | FREE (word_spec); | |
585 | ||
586 | /* Perhaps there are other modifiers involved. Do what they say. */ | |
5bdf8622 | 587 | want_quotes = substitute_globally = subst_bywords = print_only = 0; |
d60d9f65 SS |
588 | starting_index = i; |
589 | ||
590 | while (string[i] == ':') | |
591 | { | |
592 | c = string[i + 1]; | |
593 | ||
5bdf8622 | 594 | if (c == 'g' || c == 'a') |
d60d9f65 SS |
595 | { |
596 | substitute_globally = 1; | |
597 | i++; | |
598 | c = string[i + 1]; | |
599 | } | |
5bdf8622 DJ |
600 | else if (c == 'G') |
601 | { | |
602 | subst_bywords = 1; | |
603 | i++; | |
604 | c = string[i + 1]; | |
605 | } | |
d60d9f65 SS |
606 | |
607 | switch (c) | |
608 | { | |
609 | default: | |
610 | *ret_string = hist_error (string, i+1, i+2, BAD_MODIFIER); | |
cc88a640 JK |
611 | xfree (result); |
612 | xfree (temp); | |
d60d9f65 SS |
613 | return -1; |
614 | ||
615 | case 'q': | |
616 | want_quotes = 'q'; | |
617 | break; | |
618 | ||
619 | case 'x': | |
620 | want_quotes = 'x'; | |
621 | break; | |
622 | ||
623 | /* :p means make this the last executed line. So we | |
624 | return an error state after adding this line to the | |
625 | history. */ | |
626 | case 'p': | |
627 | print_only++; | |
628 | break; | |
629 | ||
630 | /* :t discards all but the last part of the pathname. */ | |
631 | case 't': | |
632 | tstr = strrchr (temp, '/'); | |
633 | if (tstr) | |
634 | { | |
635 | tstr++; | |
636 | t = savestring (tstr); | |
cc88a640 | 637 | xfree (temp); |
d60d9f65 SS |
638 | temp = t; |
639 | } | |
640 | break; | |
641 | ||
642 | /* :h discards the last part of a pathname. */ | |
643 | case 'h': | |
644 | tstr = strrchr (temp, '/'); | |
645 | if (tstr) | |
646 | *tstr = '\0'; | |
647 | break; | |
648 | ||
649 | /* :r discards the suffix. */ | |
650 | case 'r': | |
651 | tstr = strrchr (temp, '.'); | |
652 | if (tstr) | |
653 | *tstr = '\0'; | |
654 | break; | |
655 | ||
656 | /* :e discards everything but the suffix. */ | |
657 | case 'e': | |
658 | tstr = strrchr (temp, '.'); | |
659 | if (tstr) | |
660 | { | |
661 | t = savestring (tstr); | |
cc88a640 | 662 | xfree (temp); |
d60d9f65 SS |
663 | temp = t; |
664 | } | |
665 | break; | |
666 | ||
667 | /* :s/this/that substitutes `that' for the first | |
668 | occurrence of `this'. :gs/this/that substitutes `that' | |
669 | for each occurrence of `this'. :& repeats the last | |
670 | substitution. :g& repeats the last substitution | |
671 | globally. */ | |
672 | ||
673 | case '&': | |
674 | case 's': | |
675 | { | |
9255ee31 | 676 | char *new_event; |
5bdf8622 | 677 | int delimiter, failed, si, l_temp, ws, we; |
d60d9f65 SS |
678 | |
679 | if (c == 's') | |
680 | { | |
681 | if (i + 2 < (int)strlen (string)) | |
9255ee31 EZ |
682 | { |
683 | #if defined (HANDLE_MULTIBYTE) | |
684 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
685 | { | |
686 | _rl_adjust_point (string, i + 2, &ps); | |
687 | if (_rl_get_char_len (string + i + 2, &ps) > 1) | |
688 | delimiter = 0; | |
689 | else | |
690 | delimiter = string[i + 2]; | |
691 | } | |
692 | else | |
693 | #endif /* HANDLE_MULTIBYTE */ | |
694 | delimiter = string[i + 2]; | |
695 | } | |
d60d9f65 SS |
696 | else |
697 | break; /* no search delimiter */ | |
698 | ||
699 | i += 3; | |
700 | ||
701 | t = get_subst_pattern (string, &i, delimiter, 0, &subst_lhs_len); | |
702 | /* An empty substitution lhs with no previous substitution | |
703 | uses the last search string as the lhs. */ | |
704 | if (t) | |
705 | { | |
706 | FREE (subst_lhs); | |
707 | subst_lhs = t; | |
708 | } | |
709 | else if (!subst_lhs) | |
710 | { | |
711 | if (search_string && *search_string) | |
712 | { | |
713 | subst_lhs = savestring (search_string); | |
714 | subst_lhs_len = strlen (subst_lhs); | |
715 | } | |
716 | else | |
717 | { | |
718 | subst_lhs = (char *) NULL; | |
719 | subst_lhs_len = 0; | |
720 | } | |
721 | } | |
722 | ||
d60d9f65 SS |
723 | FREE (subst_rhs); |
724 | subst_rhs = get_subst_pattern (string, &i, delimiter, 1, &subst_rhs_len); | |
725 | ||
726 | /* If `&' appears in the rhs, it's supposed to be replaced | |
727 | with the lhs. */ | |
728 | if (member ('&', subst_rhs)) | |
729 | postproc_subst_rhs (); | |
730 | } | |
731 | else | |
732 | i += 2; | |
733 | ||
c862e87b JM |
734 | /* If there is no lhs, the substitution can't succeed. */ |
735 | if (subst_lhs_len == 0) | |
736 | { | |
737 | *ret_string = hist_error (string, starting_index, i, NO_PREV_SUBST); | |
cc88a640 JK |
738 | xfree (result); |
739 | xfree (temp); | |
c862e87b JM |
740 | return -1; |
741 | } | |
742 | ||
d60d9f65 SS |
743 | l_temp = strlen (temp); |
744 | /* Ignore impossible cases. */ | |
745 | if (subst_lhs_len > l_temp) | |
746 | { | |
747 | *ret_string = hist_error (string, starting_index, i, SUBST_FAILED); | |
cc88a640 JK |
748 | xfree (result); |
749 | xfree (temp); | |
d60d9f65 SS |
750 | return (-1); |
751 | } | |
752 | ||
753 | /* Find the first occurrence of THIS in TEMP. */ | |
5bdf8622 DJ |
754 | /* Substitute SUBST_RHS for SUBST_LHS in TEMP. There are three |
755 | cases to consider: | |
756 | ||
757 | 1. substitute_globally == subst_bywords == 0 | |
758 | 2. substitute_globally == 1 && subst_bywords == 0 | |
759 | 3. substitute_globally == 0 && subst_bywords == 1 | |
760 | ||
761 | In the first case, we substitute for the first occurrence only. | |
762 | In the second case, we substitute for every occurrence. | |
763 | In the third case, we tokenize into words and substitute the | |
764 | first occurrence of each word. */ | |
765 | ||
766 | si = we = 0; | |
d60d9f65 | 767 | for (failed = 1; (si + subst_lhs_len) <= l_temp; si++) |
5bdf8622 DJ |
768 | { |
769 | /* First skip whitespace and find word boundaries if | |
770 | we're past the end of the word boundary we found | |
771 | the last time. */ | |
772 | if (subst_bywords && si > we) | |
773 | { | |
cb41b9e7 | 774 | for (; temp[si] && fielddelim (temp[si]); si++) |
5bdf8622 DJ |
775 | ; |
776 | ws = si; | |
777 | we = history_tokenize_word (temp, si); | |
778 | } | |
779 | ||
780 | if (STREQN (temp+si, subst_lhs, subst_lhs_len)) | |
781 | { | |
782 | int len = subst_rhs_len - subst_lhs_len + l_temp; | |
783 | new_event = (char *)xmalloc (1 + len); | |
784 | strncpy (new_event, temp, si); | |
785 | strncpy (new_event + si, subst_rhs, subst_rhs_len); | |
786 | strncpy (new_event + si + subst_rhs_len, | |
787 | temp + si + subst_lhs_len, | |
788 | l_temp - (si + subst_lhs_len)); | |
789 | new_event[len] = '\0'; | |
cc88a640 | 790 | xfree (temp); |
5bdf8622 DJ |
791 | temp = new_event; |
792 | ||
793 | failed = 0; | |
794 | ||
795 | if (substitute_globally) | |
796 | { | |
797 | /* Reported to fix a bug that causes it to skip every | |
798 | other match when matching a single character. Was | |
799 | si += subst_rhs_len previously. */ | |
800 | si += subst_rhs_len - 1; | |
801 | l_temp = strlen (temp); | |
802 | substitute_globally++; | |
803 | continue; | |
804 | } | |
805 | else if (subst_bywords) | |
806 | { | |
807 | si = we; | |
808 | l_temp = strlen (temp); | |
809 | continue; | |
810 | } | |
811 | else | |
812 | break; | |
813 | } | |
814 | } | |
d60d9f65 SS |
815 | |
816 | if (substitute_globally > 1) | |
817 | { | |
818 | substitute_globally = 0; | |
819 | continue; /* don't want to increment i */ | |
820 | } | |
821 | ||
822 | if (failed == 0) | |
823 | continue; /* don't want to increment i */ | |
824 | ||
825 | *ret_string = hist_error (string, starting_index, i, SUBST_FAILED); | |
cc88a640 JK |
826 | xfree (result); |
827 | xfree (temp); | |
d60d9f65 SS |
828 | return (-1); |
829 | } | |
830 | } | |
831 | i += 2; | |
832 | } | |
775e241e | 833 | /* Done with modifiers. */ |
d60d9f65 SS |
834 | /* Believe it or not, we have to back the pointer up by one. */ |
835 | --i; | |
836 | ||
837 | if (want_quotes) | |
838 | { | |
839 | char *x; | |
840 | ||
841 | if (want_quotes == 'q') | |
9255ee31 | 842 | x = sh_single_quote (temp); |
d60d9f65 SS |
843 | else if (want_quotes == 'x') |
844 | x = quote_breaks (temp); | |
845 | else | |
846 | x = savestring (temp); | |
847 | ||
cc88a640 | 848 | xfree (temp); |
d60d9f65 SS |
849 | temp = x; |
850 | } | |
851 | ||
852 | n = strlen (temp); | |
853 | if (n >= result_len) | |
9255ee31 | 854 | result = (char *)xrealloc (result, n + 2); |
d60d9f65 | 855 | strcpy (result, temp); |
cc88a640 | 856 | xfree (temp); |
d60d9f65 SS |
857 | |
858 | *end_index_ptr = i; | |
859 | *ret_string = result; | |
860 | return (print_only); | |
861 | } | |
862 | ||
863 | /* Expand the string STRING, placing the result into OUTPUT, a pointer | |
864 | to a string. Returns: | |
865 | ||
866 | -1) If there was an error in expansion. | |
867 | 0) If no expansions took place (or, if the only change in | |
868 | the text was the de-slashifying of the history expansion | |
869 | character) | |
870 | 1) If expansions did take place | |
871 | 2) If the `p' modifier was given and the caller should print the result | |
872 | ||
775e241e | 873 | If an error occurred in expansion, then OUTPUT contains a descriptive |
d60d9f65 SS |
874 | error message. */ |
875 | ||
876 | #define ADD_STRING(s) \ | |
877 | do \ | |
878 | { \ | |
879 | int sl = strlen (s); \ | |
880 | j += sl; \ | |
881 | if (j >= result_len) \ | |
882 | { \ | |
883 | while (j >= result_len) \ | |
884 | result_len += 128; \ | |
9255ee31 | 885 | result = (char *)xrealloc (result, result_len); \ |
d60d9f65 SS |
886 | } \ |
887 | strcpy (result + j - sl, s); \ | |
888 | } \ | |
889 | while (0) | |
890 | ||
891 | #define ADD_CHAR(c) \ | |
892 | do \ | |
893 | { \ | |
894 | if (j >= result_len - 1) \ | |
9255ee31 | 895 | result = (char *)xrealloc (result, result_len += 64); \ |
d60d9f65 SS |
896 | result[j++] = c; \ |
897 | result[j] = '\0'; \ | |
898 | } \ | |
899 | while (0) | |
900 | ||
901 | int | |
cb41b9e7 | 902 | history_expand (char *hstring, char **output) |
d60d9f65 SS |
903 | { |
904 | register int j; | |
775e241e | 905 | int i, r, l, passc, cc, modified, eindex, only_printing, dquote, squote, flag; |
d60d9f65 SS |
906 | char *string; |
907 | ||
908 | /* The output string, and its length. */ | |
909 | int result_len; | |
910 | char *result; | |
911 | ||
9255ee31 EZ |
912 | #if defined (HANDLE_MULTIBYTE) |
913 | char mb[MB_LEN_MAX]; | |
914 | mbstate_t ps; | |
915 | #endif | |
916 | ||
d60d9f65 SS |
917 | /* Used when adding the string. */ |
918 | char *temp; | |
919 | ||
9255ee31 EZ |
920 | if (output == 0) |
921 | return 0; | |
922 | ||
d60d9f65 SS |
923 | /* Setting the history expansion character to 0 inhibits all |
924 | history expansion. */ | |
925 | if (history_expansion_char == 0) | |
926 | { | |
927 | *output = savestring (hstring); | |
928 | return (0); | |
929 | } | |
930 | ||
931 | /* Prepare the buffer for printing error messages. */ | |
9255ee31 | 932 | result = (char *)xmalloc (result_len = 256); |
d60d9f65 SS |
933 | result[0] = '\0'; |
934 | ||
935 | only_printing = modified = 0; | |
936 | l = strlen (hstring); | |
937 | ||
938 | /* Grovel the string. Only backslash and single quotes can quote the | |
939 | history escape character. We also handle arg specifiers. */ | |
940 | ||
941 | /* Before we grovel forever, see if the history_expansion_char appears | |
942 | anywhere within the text. */ | |
943 | ||
944 | /* The quick substitution character is a history expansion all right. That | |
945 | is to say, "^this^that^" is equivalent to "!!:s^this^that^", and in fact, | |
946 | that is the substitution that we do. */ | |
947 | if (hstring[0] == history_subst_char) | |
948 | { | |
9255ee31 | 949 | string = (char *)xmalloc (l + 5); |
d60d9f65 SS |
950 | |
951 | string[0] = string[1] = history_expansion_char; | |
952 | string[2] = ':'; | |
953 | string[3] = 's'; | |
954 | strcpy (string + 4, hstring); | |
955 | l += 4; | |
956 | } | |
957 | else | |
958 | { | |
9255ee31 EZ |
959 | #if defined (HANDLE_MULTIBYTE) |
960 | memset (&ps, 0, sizeof (mbstate_t)); | |
961 | #endif | |
962 | ||
d60d9f65 SS |
963 | string = hstring; |
964 | /* If not quick substitution, still maybe have to do expansion. */ | |
965 | ||
966 | /* `!' followed by one of the characters in history_no_expand_chars | |
967 | is NOT an expansion. */ | |
cb41b9e7 TT |
968 | dquote = history_quoting_state == '"'; |
969 | squote = history_quoting_state == '\''; | |
970 | ||
971 | /* If the calling application tells us we are already reading a | |
972 | single-quoted string, consume the rest of the string right now | |
973 | and then go on. */ | |
974 | i = 0; | |
975 | if (squote && history_quotes_inhibit_expansion) | |
976 | { | |
977 | hist_string_extract_single_quoted (string, &i, 0); | |
978 | squote = 0; | |
979 | if (string[i]) | |
980 | i++; | |
981 | } | |
982 | ||
983 | for ( ; string[i]; i++) | |
d60d9f65 | 984 | { |
9255ee31 EZ |
985 | #if defined (HANDLE_MULTIBYTE) |
986 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
987 | { | |
988 | int v; | |
989 | v = _rl_get_char_len (string + i, &ps); | |
990 | if (v > 1) | |
991 | { | |
992 | i += v - 1; | |
993 | continue; | |
994 | } | |
995 | } | |
996 | #endif /* HANDLE_MULTIBYTE */ | |
997 | ||
d60d9f65 | 998 | cc = string[i + 1]; |
9255ee31 | 999 | /* The history_comment_char, if set, appearing at the beginning |
d60d9f65 SS |
1000 | of a word signifies that the rest of the line should not have |
1001 | history expansion performed on it. | |
1002 | Skip the rest of the line and break out of the loop. */ | |
1003 | if (history_comment_char && string[i] == history_comment_char && | |
775e241e | 1004 | dquote == 0 && |
9255ee31 | 1005 | (i == 0 || member (string[i - 1], history_word_delimiters))) |
d60d9f65 SS |
1006 | { |
1007 | while (string[i]) | |
1008 | i++; | |
1009 | break; | |
1010 | } | |
1011 | else if (string[i] == history_expansion_char) | |
1012 | { | |
cc88a640 | 1013 | if (cc == 0 || member (cc, history_no_expand_chars)) |
d60d9f65 | 1014 | continue; |
775e241e TT |
1015 | /* DQUOTE won't be set unless history_quotes_inhibit_expansion |
1016 | is set. The idea here is to treat double-quoted strings the | |
1017 | same as the word outside double quotes; in effect making the | |
1018 | double quote part of history_no_expand_chars when DQUOTE is | |
1019 | set. */ | |
1020 | else if (dquote && cc == '"') | |
1021 | continue; | |
d60d9f65 SS |
1022 | /* If the calling application has set |
1023 | history_inhibit_expansion_function to a function that checks | |
1024 | for special cases that should not be history expanded, | |
1025 | call the function and skip the expansion if it returns a | |
1026 | non-zero value. */ | |
1027 | else if (history_inhibit_expansion_function && | |
1028 | (*history_inhibit_expansion_function) (string, i)) | |
1029 | continue; | |
1030 | else | |
1031 | break; | |
1032 | } | |
5bdf8622 DJ |
1033 | /* Shell-like quoting: allow backslashes to quote double quotes |
1034 | inside a double-quoted string. */ | |
1035 | else if (dquote && string[i] == '\\' && cc == '"') | |
1036 | i++; | |
1037 | /* More shell-like quoting: if we're paying attention to single | |
1038 | quotes and letting them quote the history expansion character, | |
1039 | then we need to pay attention to double quotes, because single | |
1040 | quotes are not special inside double-quoted strings. */ | |
1041 | else if (history_quotes_inhibit_expansion && string[i] == '"') | |
1042 | { | |
1043 | dquote = 1 - dquote; | |
1044 | } | |
1045 | else if (dquote == 0 && history_quotes_inhibit_expansion && string[i] == '\'') | |
d60d9f65 SS |
1046 | { |
1047 | /* If this is bash, single quotes inhibit history expansion. */ | |
cc88a640 | 1048 | flag = (i > 0 && string[i - 1] == '$'); |
d60d9f65 | 1049 | i++; |
cc88a640 | 1050 | hist_string_extract_single_quoted (string, &i, flag); |
d60d9f65 SS |
1051 | } |
1052 | else if (history_quotes_inhibit_expansion && string[i] == '\\') | |
1053 | { | |
1054 | /* If this is bash, allow backslashes to quote single | |
1055 | quotes and the history expansion character. */ | |
1056 | if (cc == '\'' || cc == history_expansion_char) | |
1057 | i++; | |
1058 | } | |
5bdf8622 | 1059 | |
d60d9f65 SS |
1060 | } |
1061 | ||
1062 | if (string[i] != history_expansion_char) | |
1063 | { | |
cc88a640 | 1064 | xfree (result); |
d60d9f65 SS |
1065 | *output = savestring (string); |
1066 | return (0); | |
1067 | } | |
1068 | } | |
1069 | ||
1070 | /* Extract and perform the substitution. */ | |
cb41b9e7 TT |
1071 | dquote = history_quoting_state == '"'; |
1072 | squote = history_quoting_state == '\''; | |
1073 | ||
1074 | /* If the calling application tells us we are already reading a | |
1075 | single-quoted string, consume the rest of the string right now | |
1076 | and then go on. */ | |
1077 | i = j = 0; | |
1078 | if (squote && history_quotes_inhibit_expansion) | |
1079 | { | |
1080 | int c; | |
1081 | ||
1082 | hist_string_extract_single_quoted (string, &i, 0); | |
1083 | squote = 0; | |
1084 | for (c = 0; c < i; c++) | |
1085 | ADD_CHAR (string[c]); | |
1086 | if (string[i]) | |
1087 | { | |
1088 | ADD_CHAR (string[i]); | |
1089 | i++; | |
1090 | } | |
1091 | } | |
1092 | ||
1093 | for (passc = 0; i < l; i++) | |
d60d9f65 | 1094 | { |
775e241e | 1095 | int qc, tchar = string[i]; |
d60d9f65 SS |
1096 | |
1097 | if (passc) | |
1098 | { | |
1099 | passc = 0; | |
1100 | ADD_CHAR (tchar); | |
1101 | continue; | |
1102 | } | |
1103 | ||
9255ee31 EZ |
1104 | #if defined (HANDLE_MULTIBYTE) |
1105 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
1106 | { | |
1107 | int k, c; | |
1108 | ||
1109 | c = tchar; | |
1110 | memset (mb, 0, sizeof (mb)); | |
1111 | for (k = 0; k < MB_LEN_MAX; k++) | |
1112 | { | |
1113 | mb[k] = (char)c; | |
1114 | memset (&ps, 0, sizeof (mbstate_t)); | |
1115 | if (_rl_get_char_len (mb, &ps) == -2) | |
1116 | c = string[++i]; | |
1117 | else | |
1118 | break; | |
1119 | } | |
1120 | if (strlen (mb) > 1) | |
1121 | { | |
1122 | ADD_STRING (mb); | |
cc88a640 | 1123 | continue; |
9255ee31 EZ |
1124 | } |
1125 | } | |
1126 | #endif /* HANDLE_MULTIBYTE */ | |
1127 | ||
d60d9f65 SS |
1128 | if (tchar == history_expansion_char) |
1129 | tchar = -3; | |
1130 | else if (tchar == history_comment_char) | |
1131 | tchar = -2; | |
1132 | ||
1133 | switch (tchar) | |
1134 | { | |
1135 | default: | |
1136 | ADD_CHAR (string[i]); | |
1137 | break; | |
1138 | ||
1139 | case '\\': | |
1140 | passc++; | |
1141 | ADD_CHAR (tchar); | |
1142 | break; | |
1143 | ||
5bdf8622 DJ |
1144 | case '"': |
1145 | dquote = 1 - dquote; | |
1146 | ADD_CHAR (tchar); | |
1147 | break; | |
1148 | ||
d60d9f65 SS |
1149 | case '\'': |
1150 | { | |
1151 | /* If history_quotes_inhibit_expansion is set, single quotes | |
775e241e TT |
1152 | inhibit history expansion, otherwise they are treated like |
1153 | double quotes. */ | |
1154 | if (squote) | |
1155 | { | |
1156 | squote = 0; | |
1157 | ADD_CHAR (tchar); | |
1158 | } | |
1159 | else if (dquote == 0 && history_quotes_inhibit_expansion) | |
d60d9f65 SS |
1160 | { |
1161 | int quote, slen; | |
1162 | ||
cc88a640 | 1163 | flag = (i > 0 && string[i - 1] == '$'); |
d60d9f65 | 1164 | quote = i++; |
cc88a640 | 1165 | hist_string_extract_single_quoted (string, &i, flag); |
d60d9f65 SS |
1166 | |
1167 | slen = i - quote + 2; | |
9255ee31 | 1168 | temp = (char *)xmalloc (slen); |
d60d9f65 SS |
1169 | strncpy (temp, string + quote, slen); |
1170 | temp[slen - 1] = '\0'; | |
1171 | ADD_STRING (temp); | |
cc88a640 | 1172 | xfree (temp); |
d60d9f65 | 1173 | } |
775e241e TT |
1174 | else if (dquote == 0 && squote == 0 && history_quotes_inhibit_expansion == 0) |
1175 | { | |
1176 | squote = 1; | |
1177 | ADD_CHAR (string[i]); | |
1178 | } | |
d60d9f65 SS |
1179 | else |
1180 | ADD_CHAR (string[i]); | |
1181 | break; | |
1182 | } | |
1183 | ||
1184 | case -2: /* history_comment_char */ | |
775e241e TT |
1185 | if ((dquote == 0 || history_quotes_inhibit_expansion == 0) && |
1186 | (i == 0 || member (string[i - 1], history_word_delimiters))) | |
d60d9f65 | 1187 | { |
9255ee31 | 1188 | temp = (char *)xmalloc (l - i + 1); |
d60d9f65 SS |
1189 | strcpy (temp, string + i); |
1190 | ADD_STRING (temp); | |
cc88a640 | 1191 | xfree (temp); |
d60d9f65 SS |
1192 | i = l; |
1193 | } | |
1194 | else | |
1195 | ADD_CHAR (string[i]); | |
1196 | break; | |
1197 | ||
1198 | case -3: /* history_expansion_char */ | |
1199 | cc = string[i + 1]; | |
1200 | ||
1201 | /* If the history_expansion_char is followed by one of the | |
1202 | characters in history_no_expand_chars, then it is not a | |
1203 | candidate for expansion of any kind. */ | |
cc88a640 | 1204 | if (cc == 0 || member (cc, history_no_expand_chars) || |
775e241e | 1205 | (dquote && cc == '"') || |
cc88a640 | 1206 | (history_inhibit_expansion_function && (*history_inhibit_expansion_function) (string, i))) |
d60d9f65 SS |
1207 | { |
1208 | ADD_CHAR (string[i]); | |
1209 | break; | |
1210 | } | |
1211 | ||
1212 | #if defined (NO_BANG_HASH_MODIFIERS) | |
1213 | /* There is something that is listed as a `word specifier' in csh | |
1214 | documentation which means `the expanded text to this point'. | |
1215 | That is not a word specifier, it is an event specifier. If we | |
1216 | don't want to allow modifiers with `!#', just stick the current | |
1217 | output line in again. */ | |
1218 | if (cc == '#') | |
1219 | { | |
1220 | if (result) | |
1221 | { | |
9255ee31 | 1222 | temp = (char *)xmalloc (1 + strlen (result)); |
d60d9f65 SS |
1223 | strcpy (temp, result); |
1224 | ADD_STRING (temp); | |
cc88a640 | 1225 | xfree (temp); |
d60d9f65 SS |
1226 | } |
1227 | i++; | |
1228 | break; | |
1229 | } | |
1230 | #endif | |
775e241e TT |
1231 | qc = squote ? '\'' : (dquote ? '"' : 0); |
1232 | r = history_expand_internal (string, i, qc, &eindex, &temp, result); | |
d60d9f65 SS |
1233 | if (r < 0) |
1234 | { | |
1235 | *output = temp; | |
cc88a640 | 1236 | xfree (result); |
d60d9f65 | 1237 | if (string != hstring) |
cc88a640 | 1238 | xfree (string); |
d60d9f65 SS |
1239 | return -1; |
1240 | } | |
1241 | else | |
1242 | { | |
1243 | if (temp) | |
1244 | { | |
1245 | modified++; | |
1246 | if (*temp) | |
1247 | ADD_STRING (temp); | |
cc88a640 | 1248 | xfree (temp); |
d60d9f65 | 1249 | } |
775e241e | 1250 | only_printing += r == 1; |
d60d9f65 SS |
1251 | i = eindex; |
1252 | } | |
1253 | break; | |
1254 | } | |
1255 | } | |
1256 | ||
1257 | *output = result; | |
1258 | if (string != hstring) | |
cc88a640 | 1259 | xfree (string); |
d60d9f65 SS |
1260 | |
1261 | if (only_printing) | |
1262 | { | |
5bdf8622 | 1263 | #if 0 |
d60d9f65 | 1264 | add_history (result); |
5bdf8622 | 1265 | #endif |
d60d9f65 SS |
1266 | return (2); |
1267 | } | |
1268 | ||
1269 | return (modified != 0); | |
1270 | } | |
1271 | ||
1272 | /* Return a consed string which is the word specified in SPEC, and found | |
1273 | in FROM. NULL is returned if there is no spec. The address of | |
1274 | ERROR_POINTER is returned if the word specified cannot be found. | |
1275 | CALLER_INDEX is the offset in SPEC to start looking; it is updated | |
1276 | to point to just after the last character parsed. */ | |
1277 | static char * | |
cb41b9e7 | 1278 | get_history_word_specifier (char *spec, char *from, int *caller_index) |
d60d9f65 SS |
1279 | { |
1280 | register int i = *caller_index; | |
1281 | int first, last; | |
1282 | int expecting_word_spec = 0; | |
1283 | char *result; | |
1284 | ||
1285 | /* The range of words to return doesn't exist yet. */ | |
1286 | first = last = 0; | |
1287 | result = (char *)NULL; | |
1288 | ||
1289 | /* If we found a colon, then this *must* be a word specification. If | |
1290 | it isn't, then it is an error. */ | |
1291 | if (spec[i] == ':') | |
1292 | { | |
1293 | i++; | |
1294 | expecting_word_spec++; | |
1295 | } | |
1296 | ||
1297 | /* Handle special cases first. */ | |
1298 | ||
1299 | /* `%' is the word last searched for. */ | |
1300 | if (spec[i] == '%') | |
1301 | { | |
1302 | *caller_index = i + 1; | |
1303 | return (search_match ? savestring (search_match) : savestring ("")); | |
1304 | } | |
1305 | ||
1306 | /* `*' matches all of the arguments, but not the command. */ | |
1307 | if (spec[i] == '*') | |
1308 | { | |
1309 | *caller_index = i + 1; | |
1310 | result = history_arg_extract (1, '$', from); | |
1311 | return (result ? result : savestring ("")); | |
1312 | } | |
1313 | ||
1314 | /* `$' is last arg. */ | |
1315 | if (spec[i] == '$') | |
1316 | { | |
1317 | *caller_index = i + 1; | |
1318 | return (history_arg_extract ('$', '$', from)); | |
1319 | } | |
1320 | ||
1321 | /* Try to get FIRST and LAST figured out. */ | |
1322 | ||
1323 | if (spec[i] == '-') | |
1324 | first = 0; | |
1325 | else if (spec[i] == '^') | |
5bdf8622 DJ |
1326 | { |
1327 | first = 1; | |
1328 | i++; | |
1329 | } | |
d60d9f65 SS |
1330 | else if (_rl_digit_p (spec[i]) && expecting_word_spec) |
1331 | { | |
1332 | for (first = 0; _rl_digit_p (spec[i]); i++) | |
1333 | first = (first * 10) + _rl_digit_value (spec[i]); | |
1334 | } | |
1335 | else | |
1336 | return ((char *)NULL); /* no valid `first' for word specifier */ | |
1337 | ||
1338 | if (spec[i] == '^' || spec[i] == '*') | |
1339 | { | |
1340 | last = (spec[i] == '^') ? 1 : '$'; /* x* abbreviates x-$ */ | |
1341 | i++; | |
1342 | } | |
1343 | else if (spec[i] != '-') | |
1344 | last = first; | |
1345 | else | |
1346 | { | |
1347 | i++; | |
1348 | ||
1349 | if (_rl_digit_p (spec[i])) | |
1350 | { | |
1351 | for (last = 0; _rl_digit_p (spec[i]); i++) | |
1352 | last = (last * 10) + _rl_digit_value (spec[i]); | |
1353 | } | |
1354 | else if (spec[i] == '$') | |
1355 | { | |
1356 | i++; | |
1357 | last = '$'; | |
1358 | } | |
9255ee31 EZ |
1359 | #if 0 |
1360 | else if (!spec[i] || spec[i] == ':') | |
1361 | /* check against `:' because there could be a modifier separator */ | |
1362 | #else | |
1363 | else | |
1364 | /* csh seems to allow anything to terminate the word spec here, | |
1365 | leaving it as an abbreviation. */ | |
1366 | #endif | |
d60d9f65 SS |
1367 | last = -1; /* x- abbreviates x-$ omitting word `$' */ |
1368 | } | |
1369 | ||
1370 | *caller_index = i; | |
1371 | ||
1372 | if (last >= first || last == '$' || last < 0) | |
1373 | result = history_arg_extract (first, last, from); | |
1374 | ||
1375 | return (result ? result : (char *)&error_pointer); | |
1376 | } | |
1377 | ||
1378 | /* Extract the args specified, starting at FIRST, and ending at LAST. | |
1379 | The args are taken from STRING. If either FIRST or LAST is < 0, | |
1380 | then make that arg count from the right (subtract from the number of | |
1381 | tokens, so that FIRST = -1 means the next to last token on the line). | |
1382 | If LAST is `$' the last arg from STRING is used. */ | |
1383 | char * | |
cb41b9e7 | 1384 | history_arg_extract (int first, int last, const char *string) |
d60d9f65 SS |
1385 | { |
1386 | register int i, len; | |
1387 | char *result; | |
1388 | int size, offset; | |
1389 | char **list; | |
1390 | ||
1391 | /* XXX - think about making history_tokenize return a struct array, | |
1392 | each struct in array being a string and a length to avoid the | |
1393 | calls to strlen below. */ | |
1394 | if ((list = history_tokenize (string)) == NULL) | |
1395 | return ((char *)NULL); | |
1396 | ||
1397 | for (len = 0; list[len]; len++) | |
1398 | ; | |
1399 | ||
1400 | if (last < 0) | |
1401 | last = len + last - 1; | |
1402 | ||
1403 | if (first < 0) | |
1404 | first = len + first - 1; | |
1405 | ||
1406 | if (last == '$') | |
1407 | last = len - 1; | |
1408 | ||
1409 | if (first == '$') | |
1410 | first = len - 1; | |
1411 | ||
1412 | last++; | |
1413 | ||
1414 | if (first >= len || last > len || first < 0 || last < 0 || first > last) | |
1415 | result = ((char *)NULL); | |
1416 | else | |
1417 | { | |
1418 | for (size = 0, i = first; i < last; i++) | |
1419 | size += strlen (list[i]) + 1; | |
9255ee31 | 1420 | result = (char *)xmalloc (size + 1); |
d60d9f65 SS |
1421 | result[0] = '\0'; |
1422 | ||
1423 | for (i = first, offset = 0; i < last; i++) | |
1424 | { | |
1425 | strcpy (result + offset, list[i]); | |
1426 | offset += strlen (list[i]); | |
1427 | if (i + 1 < last) | |
1428 | { | |
1429 | result[offset++] = ' '; | |
1430 | result[offset] = 0; | |
1431 | } | |
1432 | } | |
1433 | } | |
1434 | ||
1435 | for (i = 0; i < len; i++) | |
cc88a640 JK |
1436 | xfree (list[i]); |
1437 | xfree (list); | |
d60d9f65 SS |
1438 | |
1439 | return (result); | |
1440 | } | |
1441 | ||
5bdf8622 | 1442 | static int |
cb41b9e7 | 1443 | history_tokenize_word (const char *string, int ind) |
5bdf8622 | 1444 | { |
775e241e | 1445 | register int i, j; |
cc88a640 | 1446 | int delimiter, nestdelim, delimopen; |
5bdf8622 DJ |
1447 | |
1448 | i = ind; | |
cc88a640 | 1449 | delimiter = nestdelim = 0; |
5bdf8622 | 1450 | |
cb41b9e7 | 1451 | if (member (string[i], "()\n")) /* XXX - included \n, but why? been here forever */ |
5bdf8622 DJ |
1452 | { |
1453 | i++; | |
1454 | return i; | |
1455 | } | |
1456 | ||
775e241e TT |
1457 | if (ISDIGIT (string[i])) |
1458 | { | |
1459 | j = i; | |
1460 | while (string[j] && ISDIGIT (string[j])) | |
1461 | j++; | |
1462 | if (string[j] == 0) | |
1463 | return (j); | |
1464 | if (string[j] == '<' || string[j] == '>') | |
1465 | i = j; /* digit sequence is a file descriptor */ | |
1466 | else | |
1467 | { | |
1468 | i = j; | |
1469 | goto get_word; /* digit sequence is part of a word */ | |
1470 | } | |
1471 | } | |
1472 | ||
cb41b9e7 | 1473 | if (member (string[i], "<>;&|")) |
5bdf8622 DJ |
1474 | { |
1475 | int peek = string[i + 1]; | |
1476 | ||
cb41b9e7 | 1477 | if (peek == string[i]) |
5bdf8622 DJ |
1478 | { |
1479 | if (peek == '<' && string[i + 2] == '-') | |
1480 | i++; | |
cc88a640 JK |
1481 | else if (peek == '<' && string[i + 2] == '<') |
1482 | i++; | |
5bdf8622 DJ |
1483 | i += 2; |
1484 | return i; | |
1485 | } | |
775e241e TT |
1486 | else if (peek == '&' && (string[i] == '>' || string[i] == '<')) |
1487 | { | |
1488 | j = i + 2; | |
1489 | while (string[j] && ISDIGIT (string[j])) /* file descriptor */ | |
1490 | j++; | |
1491 | if (string[j] =='-') /* <&[digits]-, >&[digits]- */ | |
1492 | j++; | |
1493 | return j; | |
1494 | } | |
1495 | else if ((peek == '>' && string[i] == '&') || (peek == '|' && string[i] == '>')) | |
5bdf8622 | 1496 | { |
cc88a640 JK |
1497 | i += 2; |
1498 | return i; | |
1499 | } | |
cb41b9e7 TT |
1500 | /* XXX - process substitution -- separated out for later -- bash-4.2 */ |
1501 | else if (peek == '(' && (string[i] == '>' || string[i] == '<')) /*)*/ | |
cc88a640 JK |
1502 | { |
1503 | i += 2; | |
1504 | delimopen = '('; | |
1505 | delimiter = ')'; | |
1506 | nestdelim = 1; | |
1507 | goto get_word; | |
5bdf8622 DJ |
1508 | } |
1509 | ||
cb41b9e7 TT |
1510 | i++; |
1511 | return i; | |
cc88a640 JK |
1512 | } |
1513 | ||
1514 | get_word: | |
5bdf8622 DJ |
1515 | /* Get word from string + i; */ |
1516 | ||
cc88a640 | 1517 | if (delimiter == 0 && member (string[i], HISTORY_QUOTE_CHARACTERS)) |
5bdf8622 DJ |
1518 | delimiter = string[i++]; |
1519 | ||
1520 | for (; string[i]; i++) | |
1521 | { | |
1522 | if (string[i] == '\\' && string[i + 1] == '\n') | |
1523 | { | |
1524 | i++; | |
1525 | continue; | |
1526 | } | |
1527 | ||
1528 | if (string[i] == '\\' && delimiter != '\'' && | |
1529 | (delimiter != '"' || member (string[i], slashify_in_quotes))) | |
1530 | { | |
1531 | i++; | |
1532 | continue; | |
1533 | } | |
1534 | ||
cc88a640 JK |
1535 | /* delimiter must be set and set to something other than a quote if |
1536 | nestdelim is set, so these tests are safe. */ | |
1537 | if (nestdelim && string[i] == delimopen) | |
1538 | { | |
1539 | nestdelim++; | |
1540 | continue; | |
1541 | } | |
1542 | if (nestdelim && string[i] == delimiter) | |
1543 | { | |
1544 | nestdelim--; | |
1545 | if (nestdelim == 0) | |
1546 | delimiter = 0; | |
1547 | continue; | |
1548 | } | |
1549 | ||
5bdf8622 DJ |
1550 | if (delimiter && string[i] == delimiter) |
1551 | { | |
1552 | delimiter = 0; | |
1553 | continue; | |
1554 | } | |
1555 | ||
cb41b9e7 TT |
1556 | /* Command and process substitution; shell extended globbing patterns */ |
1557 | if (nestdelim == 0 && delimiter == 0 && member (string[i], "<>$!@?+*") && string[i+1] == '(') /*)*/ | |
1558 | { | |
1559 | i += 2; | |
1560 | delimopen = '('; | |
1561 | delimiter = ')'; | |
1562 | nestdelim = 1; | |
1563 | continue; | |
1564 | } | |
1565 | ||
cc88a640 | 1566 | if (delimiter == 0 && (member (string[i], history_word_delimiters))) |
5bdf8622 DJ |
1567 | break; |
1568 | ||
cc88a640 | 1569 | if (delimiter == 0 && member (string[i], HISTORY_QUOTE_CHARACTERS)) |
5bdf8622 DJ |
1570 | delimiter = string[i]; |
1571 | } | |
1572 | ||
1573 | return i; | |
1574 | } | |
1575 | ||
1576 | static char * | |
cb41b9e7 | 1577 | history_substring (const char *string, int start, int end) |
5bdf8622 DJ |
1578 | { |
1579 | register int len; | |
1580 | register char *result; | |
1581 | ||
1582 | len = end - start; | |
1583 | result = (char *)xmalloc (len + 1); | |
1584 | strncpy (result, string + start, len); | |
1585 | result[len] = '\0'; | |
1586 | return result; | |
1587 | } | |
d60d9f65 SS |
1588 | |
1589 | /* Parse STRING into tokens and return an array of strings. If WIND is | |
1590 | not -1 and INDP is not null, we also want the word surrounding index | |
1591 | WIND. The position in the returned array of strings is returned in | |
1592 | *INDP. */ | |
1593 | static char ** | |
cb41b9e7 | 1594 | history_tokenize_internal (const char *string, int wind, int *indp) |
d60d9f65 SS |
1595 | { |
1596 | char **result; | |
1597 | register int i, start, result_index, size; | |
d60d9f65 | 1598 | |
9255ee31 EZ |
1599 | /* If we're searching for a string that's not part of a word (e.g., " "), |
1600 | make sure we set *INDP to a reasonable value. */ | |
1601 | if (indp && wind != -1) | |
1602 | *indp = -1; | |
1603 | ||
d60d9f65 SS |
1604 | /* Get a token, and stuff it into RESULT. The tokens are split |
1605 | exactly where the shell would split them. */ | |
1606 | for (i = result_index = size = 0, result = (char **)NULL; string[i]; ) | |
1607 | { | |
d60d9f65 | 1608 | /* Skip leading whitespace. */ |
cb41b9e7 | 1609 | for (; string[i] && fielddelim (string[i]); i++) |
d60d9f65 SS |
1610 | ; |
1611 | if (string[i] == 0 || string[i] == history_comment_char) | |
1612 | return (result); | |
1613 | ||
1614 | start = i; | |
d60d9f65 | 1615 | |
5bdf8622 | 1616 | i = history_tokenize_word (string, start); |
d60d9f65 | 1617 | |
5bdf8622 DJ |
1618 | /* If we have a non-whitespace delimiter character (which would not be |
1619 | skipped by the loop above), use it and any adjacent delimiters to | |
1620 | make a separate field. Any adjacent white space will be skipped the | |
1621 | next time through the loop. */ | |
1622 | if (i == start && history_word_delimiters) | |
d60d9f65 | 1623 | { |
5bdf8622 DJ |
1624 | i++; |
1625 | while (string[i] && member (string[i], history_word_delimiters)) | |
1626 | i++; | |
d60d9f65 SS |
1627 | } |
1628 | ||
d60d9f65 SS |
1629 | /* If we are looking for the word in which the character at a |
1630 | particular index falls, remember it. */ | |
1631 | if (indp && wind != -1 && wind >= start && wind < i) | |
1632 | *indp = result_index; | |
1633 | ||
d60d9f65 SS |
1634 | if (result_index + 2 >= size) |
1635 | result = (char **)xrealloc (result, ((size += 10) * sizeof (char *))); | |
5bdf8622 DJ |
1636 | |
1637 | result[result_index++] = history_substring (string, start, i); | |
1638 | result[result_index] = (char *)NULL; | |
d60d9f65 SS |
1639 | } |
1640 | ||
1641 | return (result); | |
1642 | } | |
1643 | ||
1644 | /* Return an array of tokens, much as the shell might. The tokens are | |
1645 | parsed out of STRING. */ | |
1646 | char ** | |
cb41b9e7 | 1647 | history_tokenize (const char *string) |
d60d9f65 SS |
1648 | { |
1649 | return (history_tokenize_internal (string, -1, (int *)NULL)); | |
1650 | } | |
1651 | ||
cc88a640 JK |
1652 | /* Free members of WORDS from START to an empty string */ |
1653 | static void | |
cb41b9e7 | 1654 | freewords (char **words, int start) |
cc88a640 JK |
1655 | { |
1656 | register int i; | |
1657 | ||
1658 | for (i = start; words[i]; i++) | |
1659 | xfree (words[i]); | |
1660 | } | |
1661 | ||
d60d9f65 SS |
1662 | /* Find and return the word which contains the character at index IND |
1663 | in the history line LINE. Used to save the word matched by the | |
1664 | last history !?string? search. */ | |
1665 | static char * | |
cb41b9e7 | 1666 | history_find_word (char *line, int ind) |
d60d9f65 SS |
1667 | { |
1668 | char **words, *s; | |
1669 | int i, wind; | |
1670 | ||
1671 | words = history_tokenize_internal (line, ind, &wind); | |
9255ee31 | 1672 | if (wind == -1 || words == 0) |
cc88a640 JK |
1673 | { |
1674 | if (words) | |
1675 | freewords (words, 0); | |
1676 | FREE (words); | |
1677 | return ((char *)NULL); | |
1678 | } | |
d60d9f65 SS |
1679 | s = words[wind]; |
1680 | for (i = 0; i < wind; i++) | |
cc88a640 JK |
1681 | xfree (words[i]); |
1682 | freewords (words, wind + 1); | |
1683 | xfree (words); | |
d60d9f65 SS |
1684 | return s; |
1685 | } |