Commit | Line | Data |
---|---|---|
d60d9f65 SS |
1 | /* util.c -- readline utility functions */ |
2 | ||
775e241e | 3 | /* Copyright (C) 1987-2015 Free Software Foundation, Inc. |
d60d9f65 | 4 | |
cc88a640 JK |
5 | This file is part of the GNU Readline Library (Readline), a library |
6 | for reading lines of text with interactive input and history editing. | |
d60d9f65 | 7 | |
cc88a640 JK |
8 | Readline is free software: you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation, either version 3 of the License, or | |
d60d9f65 SS |
11 | (at your option) any later version. |
12 | ||
cc88a640 JK |
13 | Readline 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 | |
d60d9f65 SS |
16 | GNU General Public License for more details. |
17 | ||
cc88a640 JK |
18 | You should have received a copy of the GNU General Public License |
19 | along with Readline. If not, see <http://www.gnu.org/licenses/>. | |
20 | */ | |
21 | ||
d60d9f65 SS |
22 | #define READLINE_LIBRARY |
23 | ||
24 | #if defined (HAVE_CONFIG_H) | |
25 | # include <config.h> | |
26 | #endif | |
27 | ||
28 | #include <sys/types.h> | |
29 | #include <fcntl.h> | |
30 | #include "posixjmp.h" | |
31 | ||
32 | #if defined (HAVE_UNISTD_H) | |
33 | # include <unistd.h> /* for _POSIX_VERSION */ | |
34 | #endif /* HAVE_UNISTD_H */ | |
35 | ||
36 | #if defined (HAVE_STDLIB_H) | |
37 | # include <stdlib.h> | |
38 | #else | |
39 | # include "ansi_stdlib.h" | |
40 | #endif /* HAVE_STDLIB_H */ | |
41 | ||
42 | #include <stdio.h> | |
43 | #include <ctype.h> | |
44 | ||
45 | /* System-specific feature definitions and include files. */ | |
46 | #include "rldefs.h" | |
5bdf8622 | 47 | #include "rlmbutil.h" |
d60d9f65 SS |
48 | |
49 | #if defined (TIOCSTAT_IN_SYS_IOCTL) | |
50 | # include <sys/ioctl.h> | |
51 | #endif /* TIOCSTAT_IN_SYS_IOCTL */ | |
52 | ||
53 | /* Some standard library routines. */ | |
54 | #include "readline.h" | |
55 | ||
1b17e766 EZ |
56 | #include "rlprivate.h" |
57 | #include "xmalloc.h" | |
7f3c5ec8 | 58 | #include "rlshell.h" |
d60d9f65 | 59 | |
d60d9f65 SS |
60 | /* **************************************************************** */ |
61 | /* */ | |
62 | /* Utility Functions */ | |
63 | /* */ | |
64 | /* **************************************************************** */ | |
65 | ||
66 | /* Return 0 if C is not a member of the class of characters that belong | |
67 | in words, or 1 if it is. */ | |
68 | ||
69 | int _rl_allow_pathname_alphabetic_chars = 0; | |
cc88a640 | 70 | static const char * const pathname_alphabetic_chars = "/-_=~.#$"; |
d60d9f65 SS |
71 | |
72 | int | |
9255ee31 | 73 | rl_alphabetic (c) |
d60d9f65 SS |
74 | int c; |
75 | { | |
76 | if (ALPHABETIC (c)) | |
77 | return (1); | |
78 | ||
79 | return (_rl_allow_pathname_alphabetic_chars && | |
80 | strchr (pathname_alphabetic_chars, c) != NULL); | |
81 | } | |
82 | ||
5bdf8622 DJ |
83 | #if defined (HANDLE_MULTIBYTE) |
84 | int | |
cc88a640 | 85 | _rl_walphabetic (wchar_t wc) |
5bdf8622 DJ |
86 | { |
87 | int c; | |
88 | ||
89 | if (iswalnum (wc)) | |
90 | return (1); | |
91 | ||
92 | c = wc & 0177; | |
93 | return (_rl_allow_pathname_alphabetic_chars && | |
94 | strchr (pathname_alphabetic_chars, c) != NULL); | |
95 | } | |
96 | #endif | |
97 | ||
d60d9f65 SS |
98 | /* How to abort things. */ |
99 | int | |
100 | _rl_abort_internal () | |
101 | { | |
9255ee31 | 102 | rl_ding (); |
d60d9f65 | 103 | rl_clear_message (); |
5bdf8622 | 104 | _rl_reset_argument (); |
9255ee31 | 105 | rl_clear_pending_input (); |
d60d9f65 | 106 | |
9255ee31 EZ |
107 | RL_UNSETSTATE (RL_STATE_MACRODEF); |
108 | while (rl_executing_macro) | |
d60d9f65 SS |
109 | _rl_pop_executing_macro (); |
110 | ||
775e241e TT |
111 | RL_UNSETSTATE (RL_STATE_MULTIKEY); /* XXX */ |
112 | ||
9255ee31 | 113 | rl_last_func = (rl_command_func_t *)NULL; |
775e241e TT |
114 | |
115 | _rl_longjmp (_rl_top_level, 1); | |
d60d9f65 SS |
116 | return (0); |
117 | } | |
118 | ||
119 | int | |
120 | rl_abort (count, key) | |
121 | int count, key; | |
122 | { | |
123 | return (_rl_abort_internal ()); | |
124 | } | |
125 | ||
cc88a640 JK |
126 | int |
127 | _rl_null_function (count, key) | |
128 | int count, key; | |
129 | { | |
130 | return 0; | |
131 | } | |
132 | ||
d60d9f65 SS |
133 | int |
134 | rl_tty_status (count, key) | |
135 | int count, key; | |
136 | { | |
137 | #if defined (TIOCSTAT) | |
138 | ioctl (1, TIOCSTAT, (char *)0); | |
c862e87b | 139 | rl_refresh_line (count, key); |
d60d9f65 | 140 | #else |
9255ee31 | 141 | rl_ding (); |
d60d9f65 SS |
142 | #endif |
143 | return 0; | |
144 | } | |
145 | ||
146 | /* Return a copy of the string between FROM and TO. | |
147 | FROM is inclusive, TO is not. */ | |
148 | char * | |
149 | rl_copy_text (from, to) | |
150 | int from, to; | |
151 | { | |
152 | register int length; | |
153 | char *copy; | |
154 | ||
155 | /* Fix it if the caller is confused. */ | |
156 | if (from > to) | |
157 | SWAP (from, to); | |
158 | ||
159 | length = to - from; | |
9255ee31 | 160 | copy = (char *)xmalloc (1 + length); |
d60d9f65 SS |
161 | strncpy (copy, rl_line_buffer + from, length); |
162 | copy[length] = '\0'; | |
163 | return (copy); | |
164 | } | |
165 | ||
166 | /* Increase the size of RL_LINE_BUFFER until it has enough space to hold | |
167 | LEN characters. */ | |
168 | void | |
169 | rl_extend_line_buffer (len) | |
170 | int len; | |
171 | { | |
172 | while (len >= rl_line_buffer_len) | |
173 | { | |
174 | rl_line_buffer_len += DEFAULT_BUFFER_SIZE; | |
9255ee31 | 175 | rl_line_buffer = (char *)xrealloc (rl_line_buffer, rl_line_buffer_len); |
d60d9f65 SS |
176 | } |
177 | ||
178 | _rl_set_the_line (); | |
179 | } | |
180 | ||
181 | ||
182 | /* A function for simple tilde expansion. */ | |
183 | int | |
184 | rl_tilde_expand (ignore, key) | |
185 | int ignore, key; | |
186 | { | |
187 | register int start, end; | |
188 | char *homedir, *temp; | |
189 | int len; | |
190 | ||
191 | end = rl_point; | |
192 | start = end - 1; | |
193 | ||
194 | if (rl_point == rl_end && rl_line_buffer[rl_point] == '~') | |
195 | { | |
196 | homedir = tilde_expand ("~"); | |
197 | _rl_replace_text (homedir, start, end); | |
cc88a640 | 198 | xfree (homedir); |
d60d9f65 SS |
199 | return (0); |
200 | } | |
775e241e | 201 | else if (start >= 0 && rl_line_buffer[start] != '~') |
d60d9f65 SS |
202 | { |
203 | for (; !whitespace (rl_line_buffer[start]) && start >= 0; start--) | |
204 | ; | |
205 | start++; | |
206 | } | |
775e241e TT |
207 | else if (start < 0) |
208 | start = 0; | |
d60d9f65 SS |
209 | |
210 | end = start; | |
211 | do | |
212 | end++; | |
213 | while (whitespace (rl_line_buffer[end]) == 0 && end < rl_end); | |
214 | ||
215 | if (whitespace (rl_line_buffer[end]) || end >= rl_end) | |
216 | end--; | |
217 | ||
218 | /* If the first character of the current word is a tilde, perform | |
219 | tilde expansion and insert the result. If not a tilde, do | |
220 | nothing. */ | |
221 | if (rl_line_buffer[start] == '~') | |
222 | { | |
223 | len = end - start + 1; | |
9255ee31 | 224 | temp = (char *)xmalloc (len + 1); |
d60d9f65 SS |
225 | strncpy (temp, rl_line_buffer + start, len); |
226 | temp[len] = '\0'; | |
227 | homedir = tilde_expand (temp); | |
cc88a640 | 228 | xfree (temp); |
d60d9f65 SS |
229 | |
230 | _rl_replace_text (homedir, start, end); | |
cc88a640 | 231 | xfree (homedir); |
d60d9f65 SS |
232 | } |
233 | ||
234 | return (0); | |
235 | } | |
236 | ||
cc88a640 JK |
237 | #if defined (USE_VARARGS) |
238 | void | |
239 | #if defined (PREFER_STDARG) | |
240 | _rl_ttymsg (const char *format, ...) | |
241 | #else | |
242 | _rl_ttymsg (va_alist) | |
243 | va_dcl | |
244 | #endif | |
245 | { | |
246 | va_list args; | |
247 | #if defined (PREFER_VARARGS) | |
248 | char *format; | |
249 | #endif | |
250 | ||
251 | #if defined (PREFER_STDARG) | |
252 | va_start (args, format); | |
253 | #else | |
254 | va_start (args); | |
255 | format = va_arg (args, char *); | |
256 | #endif | |
257 | ||
258 | fprintf (stderr, "readline: "); | |
259 | vfprintf (stderr, format, args); | |
260 | fprintf (stderr, "\n"); | |
261 | fflush (stderr); | |
262 | ||
263 | va_end (args); | |
264 | ||
265 | rl_forced_update_display (); | |
266 | } | |
267 | ||
268 | void | |
269 | #if defined (PREFER_STDARG) | |
270 | _rl_errmsg (const char *format, ...) | |
271 | #else | |
272 | _rl_errmsg (va_alist) | |
273 | va_dcl | |
274 | #endif | |
275 | { | |
276 | va_list args; | |
277 | #if defined (PREFER_VARARGS) | |
278 | char *format; | |
279 | #endif | |
280 | ||
281 | #if defined (PREFER_STDARG) | |
282 | va_start (args, format); | |
283 | #else | |
284 | va_start (args); | |
285 | format = va_arg (args, char *); | |
286 | #endif | |
287 | ||
288 | fprintf (stderr, "readline: "); | |
289 | vfprintf (stderr, format, args); | |
290 | fprintf (stderr, "\n"); | |
291 | fflush (stderr); | |
292 | ||
293 | va_end (args); | |
294 | } | |
295 | ||
296 | #else /* !USE_VARARGS */ | |
297 | void | |
298 | _rl_ttymsg (format, arg1, arg2) | |
299 | char *format; | |
300 | { | |
301 | fprintf (stderr, "readline: "); | |
302 | fprintf (stderr, format, arg1, arg2); | |
303 | fprintf (stderr, "\n"); | |
304 | ||
305 | rl_forced_update_display (); | |
306 | } | |
307 | ||
308 | void | |
309 | _rl_errmsg (format, arg1, arg2) | |
310 | char *format; | |
311 | { | |
312 | fprintf (stderr, "readline: "); | |
313 | fprintf (stderr, format, arg1, arg2); | |
314 | fprintf (stderr, "\n"); | |
315 | } | |
316 | #endif /* !USE_VARARGS */ | |
317 | ||
d60d9f65 SS |
318 | /* **************************************************************** */ |
319 | /* */ | |
320 | /* String Utility Functions */ | |
321 | /* */ | |
322 | /* **************************************************************** */ | |
323 | ||
324 | /* Determine if s2 occurs in s1. If so, return a pointer to the | |
325 | match in s1. The compare is case insensitive. */ | |
326 | char * | |
327 | _rl_strindex (s1, s2) | |
9255ee31 | 328 | register const char *s1, *s2; |
d60d9f65 SS |
329 | { |
330 | register int i, l, len; | |
331 | ||
332 | for (i = 0, l = strlen (s2), len = strlen (s1); (len - i) >= l; i++) | |
333 | if (_rl_strnicmp (s1 + i, s2, l) == 0) | |
9255ee31 | 334 | return ((char *) (s1 + i)); |
d60d9f65 SS |
335 | return ((char *)NULL); |
336 | } | |
337 | ||
9255ee31 EZ |
338 | #ifndef HAVE_STRPBRK |
339 | /* Find the first occurrence in STRING1 of any character from STRING2. | |
340 | Return a pointer to the character in STRING1. */ | |
341 | char * | |
342 | _rl_strpbrk (string1, string2) | |
343 | const char *string1, *string2; | |
344 | { | |
345 | register const char *scan; | |
346 | #if defined (HANDLE_MULTIBYTE) | |
347 | mbstate_t ps; | |
348 | register int i, v; | |
349 | ||
350 | memset (&ps, 0, sizeof (mbstate_t)); | |
351 | #endif | |
352 | ||
353 | for (; *string1; string1++) | |
354 | { | |
355 | for (scan = string2; *scan; scan++) | |
356 | { | |
357 | if (*string1 == *scan) | |
358 | return ((char *)string1); | |
359 | } | |
360 | #if defined (HANDLE_MULTIBYTE) | |
361 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
362 | { | |
363 | v = _rl_get_char_len (string1, &ps); | |
364 | if (v > 1) | |
5bdf8622 | 365 | string1 += v - 1; /* -1 to account for auto-increment in loop */ |
9255ee31 EZ |
366 | } |
367 | #endif | |
368 | } | |
369 | return ((char *)NULL); | |
370 | } | |
371 | #endif | |
372 | ||
d60d9f65 SS |
373 | #if !defined (HAVE_STRCASECMP) |
374 | /* Compare at most COUNT characters from string1 to string2. Case | |
cc88a640 | 375 | doesn't matter (strncasecmp). */ |
d60d9f65 SS |
376 | int |
377 | _rl_strnicmp (string1, string2, count) | |
775e241e TT |
378 | const char *string1; |
379 | const char *string2; | |
d60d9f65 SS |
380 | int count; |
381 | { | |
775e241e TT |
382 | register const char *s1; |
383 | register const char *s2; | |
384 | register int d; | |
d60d9f65 | 385 | |
cc88a640 JK |
386 | if (count <= 0 || (string1 == string2)) |
387 | return 0; | |
388 | ||
389 | s1 = string1; | |
390 | s2 = string2; | |
391 | do | |
d60d9f65 | 392 | { |
cc88a640 JK |
393 | d = _rl_to_lower (*s1) - _rl_to_lower (*s2); /* XXX - cast to unsigned char? */ |
394 | if (d != 0) | |
395 | return d; | |
396 | if (*s1++ == '\0') | |
d60d9f65 | 397 | break; |
cc88a640 | 398 | s2++; |
d60d9f65 | 399 | } |
ab3a7f8f | 400 | while (--count != 0); |
cc88a640 JK |
401 | |
402 | return (0); | |
d60d9f65 SS |
403 | } |
404 | ||
cc88a640 | 405 | /* strcmp (), but caseless (strcasecmp). */ |
d60d9f65 SS |
406 | int |
407 | _rl_stricmp (string1, string2) | |
775e241e TT |
408 | const char *string1; |
409 | const char *string2; | |
d60d9f65 | 410 | { |
775e241e TT |
411 | register const char *s1; |
412 | register const char *s2; | |
413 | register int d; | |
cc88a640 JK |
414 | |
415 | s1 = string1; | |
416 | s2 = string2; | |
d60d9f65 | 417 | |
cc88a640 JK |
418 | if (s1 == s2) |
419 | return 0; | |
420 | ||
421 | while ((d = _rl_to_lower (*s1) - _rl_to_lower (*s2)) == 0) | |
d60d9f65 | 422 | { |
cc88a640 JK |
423 | if (*s1++ == '\0') |
424 | return 0; | |
425 | s2++; | |
d60d9f65 | 426 | } |
cc88a640 JK |
427 | |
428 | return (d); | |
d60d9f65 SS |
429 | } |
430 | #endif /* !HAVE_STRCASECMP */ | |
431 | ||
432 | /* Stupid comparison routine for qsort () ing strings. */ | |
433 | int | |
434 | _rl_qsort_string_compare (s1, s2) | |
435 | char **s1, **s2; | |
436 | { | |
437 | #if defined (HAVE_STRCOLL) | |
438 | return (strcoll (*s1, *s2)); | |
439 | #else | |
440 | int result; | |
441 | ||
442 | result = **s1 - **s2; | |
443 | if (result == 0) | |
444 | result = strcmp (*s1, *s2); | |
445 | ||
446 | return result; | |
447 | #endif | |
448 | } | |
449 | ||
9255ee31 EZ |
450 | /* Function equivalents for the macros defined in chardefs.h. */ |
451 | #define FUNCTION_FOR_MACRO(f) int (f) (c) int c; { return f (c); } | |
d60d9f65 | 452 | |
9255ee31 EZ |
453 | FUNCTION_FOR_MACRO (_rl_digit_p) |
454 | FUNCTION_FOR_MACRO (_rl_digit_value) | |
455 | FUNCTION_FOR_MACRO (_rl_lowercase_p) | |
456 | FUNCTION_FOR_MACRO (_rl_pure_alphabetic) | |
457 | FUNCTION_FOR_MACRO (_rl_to_lower) | |
458 | FUNCTION_FOR_MACRO (_rl_to_upper) | |
459 | FUNCTION_FOR_MACRO (_rl_uppercase_p) | |
d60d9f65 | 460 | |
cc88a640 JK |
461 | /* A convenience function, to force memory deallocation to be performed |
462 | by readline. DLLs on Windows apparently require this. */ | |
463 | void | |
464 | rl_free (mem) | |
465 | void *mem; | |
466 | { | |
467 | if (mem) | |
468 | free (mem); | |
469 | } | |
470 | ||
d60d9f65 SS |
471 | /* Backwards compatibility, now that savestring has been removed from |
472 | all `public' readline header files. */ | |
473 | #undef _rl_savestring | |
474 | char * | |
475 | _rl_savestring (s) | |
9255ee31 | 476 | const char *s; |
d60d9f65 | 477 | { |
9255ee31 | 478 | return (strcpy ((char *)xmalloc (1 + (int)strlen (s)), (s))); |
d60d9f65 | 479 | } |
cc88a640 | 480 | |
775e241e | 481 | #if defined (DEBUG) |
cc88a640 JK |
482 | #if defined (USE_VARARGS) |
483 | static FILE *_rl_tracefp; | |
484 | ||
485 | void | |
486 | #if defined (PREFER_STDARG) | |
487 | _rl_trace (const char *format, ...) | |
488 | #else | |
489 | _rl_trace (va_alist) | |
490 | va_dcl | |
491 | #endif | |
492 | { | |
493 | va_list args; | |
494 | #if defined (PREFER_VARARGS) | |
495 | char *format; | |
496 | #endif | |
497 | ||
498 | #if defined (PREFER_STDARG) | |
499 | va_start (args, format); | |
500 | #else | |
501 | va_start (args); | |
502 | format = va_arg (args, char *); | |
503 | #endif | |
504 | ||
505 | if (_rl_tracefp == 0) | |
506 | _rl_tropen (); | |
507 | vfprintf (_rl_tracefp, format, args); | |
508 | fprintf (_rl_tracefp, "\n"); | |
509 | fflush (_rl_tracefp); | |
510 | ||
511 | va_end (args); | |
512 | } | |
513 | ||
514 | int | |
515 | _rl_tropen () | |
516 | { | |
775e241e | 517 | char fnbuf[128], *x; |
cc88a640 JK |
518 | |
519 | if (_rl_tracefp) | |
520 | fclose (_rl_tracefp); | |
7f3c5ec8 EZ |
521 | #if defined (_WIN32) && !defined (__CYGWIN__) |
522 | /* Windows doesn't have /var/tmp, so open the trace file in the | |
523 | user's temporary directory instead. */ | |
524 | sprintf (fnbuf, "%s/rltrace.%ld", | |
525 | (sh_get_env_value ("TEMP") | |
526 | ? sh_get_env_value ("TEMP") | |
527 | : "."), | |
16bfc2f9 | 528 | getpid ()); |
7f3c5ec8 | 529 | #else |
16bfc2f9 | 530 | sprintf (fnbuf, "/var/tmp/rltrace.%ld", (long) getpid ()); |
7f3c5ec8 | 531 | #endif |
16bfc2f9 | 532 | unlink (fnbuf); |
cc88a640 JK |
533 | _rl_tracefp = fopen (fnbuf, "w+"); |
534 | return _rl_tracefp != 0; | |
535 | } | |
536 | ||
537 | int | |
538 | _rl_trclose () | |
539 | { | |
540 | int r; | |
541 | ||
542 | r = fclose (_rl_tracefp); | |
543 | _rl_tracefp = 0; | |
544 | return r; | |
545 | } | |
546 | ||
775e241e TT |
547 | void |
548 | _rl_settracefp (fp) | |
549 | FILE *fp; | |
550 | { | |
551 | _rl_tracefp = fp; | |
552 | } | |
553 | #endif | |
554 | #endif /* DEBUG */ | |
555 | ||
556 | ||
557 | #if HAVE_DECL_AUDIT_USER_TTY && defined (HAVE_LIBAUDIT_H) && defined (ENABLE_TTY_AUDIT_SUPPORT) | |
558 | #include <sys/socket.h> | |
559 | #include <libaudit.h> | |
560 | #include <linux/audit.h> | |
561 | #include <linux/netlink.h> | |
562 | ||
563 | /* Report STRING to the audit system. */ | |
564 | void | |
565 | _rl_audit_tty (string) | |
566 | char *string; | |
567 | { | |
568 | struct audit_message req; | |
569 | struct sockaddr_nl addr; | |
570 | size_t size; | |
571 | int fd; | |
572 | ||
573 | fd = socket (PF_NETLINK, SOCK_RAW, NETLINK_AUDIT); | |
574 | if (fd < 0) | |
575 | return; | |
576 | size = strlen (string) + 1; | |
577 | ||
578 | if (NLMSG_SPACE (size) > MAX_AUDIT_MESSAGE_LENGTH) | |
579 | return; | |
580 | ||
581 | memset (&req, 0, sizeof(req)); | |
582 | req.nlh.nlmsg_len = NLMSG_SPACE (size); | |
583 | req.nlh.nlmsg_type = AUDIT_USER_TTY; | |
584 | req.nlh.nlmsg_flags = NLM_F_REQUEST; | |
585 | req.nlh.nlmsg_seq = 0; | |
586 | if (size && string) | |
587 | memcpy (NLMSG_DATA(&req.nlh), string, size); | |
588 | memset (&addr, 0, sizeof(addr)); | |
589 | ||
590 | addr.nl_family = AF_NETLINK; | |
591 | addr.nl_pid = 0; | |
592 | addr.nl_groups = 0; | |
593 | ||
594 | sendto (fd, &req, req.nlh.nlmsg_len, 0, (struct sockaddr*)&addr, sizeof(addr)); | |
595 | close (fd); | |
596 | } | |
cc88a640 | 597 | #endif |