1/* Implementation of the locale program according to POSIX 9945-2.
2 Copyright (C) 1995-2023 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; version 2 of the License, or
8 (at your option) any later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, see <https://www.gnu.org/licenses/>. */
17
18#ifdef HAVE_CONFIG_H
19# include <config.h>
20#endif
21
22#include <argp.h>
23#include <argz.h>
24#include <dirent.h>
25#include <errno.h>
26#include <error.h>
27#include <fcntl.h>
28#include <langinfo.h>
29#include <libintl.h>
30#include <limits.h>
31#include <locale.h>
32#include <search.h>
33#include <stdio.h>
34#include <stdio_ext.h>
35#include <stdlib.h>
36#include <string.h>
37#include <unistd.h>
38#include <stdint.h>
39#include <sys/mman.h>
40#include <sys/stat.h>
41
42#include "record-status.h"
43#include "localeinfo.h"
44#include "charmap-dir.h"
45#include "../locarchive.h"
46#include <programs/xmalloc.h>
47
48#define ARCHIVE_NAME COMPLOCALEDIR "/locale-archive"
49
50/* If set print the name of the category. */
51static int show_category_name;
52
53/* If set print the name of the item. */
54static int show_keyword_name;
55
56/* Print names of all available locales. */
57static int do_all;
58
59/* Print names of all available character maps. */
60static int do_charmaps = 0;
61
62/* Name and version of program. */
63static void print_version (FILE *stream, struct argp_state *state);
64void (*argp_program_version_hook) (FILE *, struct argp_state *) = print_version;
65
66/* Definitions of arguments for argp functions. */
67static const struct argp_option options[] =
68{
69 { NULL, 0, NULL, 0, N_("System information:") },
70 { "all-locales", 'a', NULL, OPTION_NO_USAGE,
71 N_("Write names of available locales") },
72 { "charmaps", 'm', NULL, OPTION_NO_USAGE,
73 N_("Write names of available charmaps") },
74 { NULL, 0, NULL, 0, N_("Modify output format:") },
75 { "category-name", 'c', NULL, 0, N_("Write names of selected categories") },
76 { "keyword-name", 'k', NULL, 0, N_("Write names of selected keywords") },
77 { "verbose", 'v', NULL, 0, N_("Print more information") },
78 { NULL, 0, NULL, 0, NULL }
79};
80
81/* Short description of program. */
82static const char doc[] = N_("Get locale-specific information.");
83
84/* Strings for arguments in help texts. */
85static const char args_doc[] = N_("NAME\n[-a|-m]");
86
87/* Prototype for option handler. */
88static error_t parse_opt (int key, char *arg, struct argp_state *state);
89
90/* Function to print some extra text in the help message. */
91static char *more_help (int key, const char *text, void *input);
92
93/* Data structure to communicate with argp functions. */
94static struct argp argp =
95{
96 options, parse_opt, args_doc, doc, NULL, more_help
97};
98
99
100/* We don't have these constants defined because we don't use them. Give
101 default values. */
102#define CTYPE_MB_CUR_MIN 0
103#define CTYPE_MB_CUR_MAX 0
104#define CTYPE_HASH_SIZE 0
105#define CTYPE_HASH_LAYERS 0
106#define CTYPE_CLASS 0
107#define CTYPE_TOUPPER_EB 0
108#define CTYPE_TOLOWER_EB 0
109#define CTYPE_TOUPPER_EL 0
110#define CTYPE_TOLOWER_EL 0
111
112/* Definition of the data structure which represents a category and its
113 items. */
114struct category
115{
116 int cat_id;
117 const char *name;
118 size_t number;
119 struct cat_item
120 {
121 int item_id;
122 const char *name;
123 enum { std, opt } status;
124 enum value_type value_type;
125 int min;
126 int max;
127 } *item_desc;
128};
129
130/* Simple helper macro. */
131#define NELEMS(arr) ((sizeof (arr)) / (sizeof (arr[0])))
132
133/* For some tricky stuff. */
134#define NO_PAREN(Item, More...) Item, ## More
135
136/* We have all categories defined in `categories.def'. Now construct
137 the description and data structure used for all categories. */
138#define DEFINE_ELEMENT(Item, More...) { Item, ## More },
139#define DEFINE_CATEGORY(category, name, items, postload) \
140 static struct cat_item category##_desc[] = \
141 { \
142 NO_PAREN items \
143 };
144
145#include "categories.def"
146#undef DEFINE_CATEGORY
147
148static struct category category[] =
149 {
150#define DEFINE_CATEGORY(category, name, items, postload) \
151 [category] = { _NL_NUM_##category, name, NELEMS (category##_desc), \
152 category##_desc },
153#include "categories.def"
154#undef DEFINE_CATEGORY
155 };
156#define NCATEGORIES NELEMS (category)
157
158
159/* Automatically set variable. */
160extern const char *__progname;
161
162/* helper function for extended name handling. */
163extern void locale_special (const char *name, int show_category_name,
164 int show_keyword_name);
165
166/* Prototypes for local functions. */
167static void print_LC_IDENTIFICATION (void *mapped, size_t size);
168static void print_LC_CTYPE (void *mapped, size_t size);
169static void write_locales (void);
170static int nameentcmp (const void *a, const void *b);
171static int write_archive_locales (void **all_datap, char *linebuf);
172static void write_charmaps (void);
173static void show_locale_vars (void);
174static void show_info (const char *name);
175static void try_setlocale (int category, const char *category_name);
176static char *quote_string (const char *input);
177static void setlocale_diagnostics (void);
178
179
180int
181main (int argc, char *argv[])
182{
183 int remaining;
184
185 /* Set initial values for global variables. */
186 show_category_name = 0;
187 show_keyword_name = 0;
188
189 /* Set locale. Do not set LC_ALL because the other categories must
190 not be affected (according to POSIX.2). */
191 try_setlocale (LC_CTYPE, "LC_CTYPE");
192 try_setlocale (LC_MESSAGES, "LC_MESSAGES");
193
194 /* Initialize the message catalog. */
195 textdomain (PACKAGE);
196
197 /* Parse and process arguments. */
198 argp_parse (&argp, argc, argv, 0, &remaining, NULL);
199
200 /* `-a' requests the names of all available locales. */
201 if (do_all != 0)
202 {
203 setlocale_diagnostics ();
204 try_setlocale (LC_COLLATE, "LC_COLLATE");
205 write_locales ();
206 exit (EXIT_SUCCESS);
207 }
208
209 /* `m' requests the names of all available charmaps. The names can be
210 used for the -f argument to localedef(1). */
211 if (do_charmaps != 0)
212 {
213 setlocale_diagnostics ();
214 write_charmaps ();
215 exit (EXIT_SUCCESS);
216 }
217
218 /* Specific information about the current locale are requested.
219 Change to this locale now. */
220 try_setlocale (LC_ALL, "LC_ALL");
221 setlocale_diagnostics ();
222
223 /* If no real argument is given we have to print the contents of the
224 current locale definition variables. These are LANG and the LC_*. */
225 if (remaining == argc && show_keyword_name == 0 && show_category_name == 0)
226 {
227 show_locale_vars ();
228 exit (EXIT_SUCCESS);
229 }
230
231 /* Process all given names. */
232 while (remaining < argc)
233 show_info (argv[remaining++]);
234
235 exit (EXIT_SUCCESS);
236}
237
238
239/* Handle program arguments. */
240static error_t
241parse_opt (int key, char *arg, struct argp_state *state)
242{
243 switch (key)
244 {
245 case 'a':
246 do_all = 1;
247 break;
248 case 'c':
249 show_category_name = 1;
250 break;
251 case 'm':
252 do_charmaps = 1;
253 break;
254 case 'k':
255 show_keyword_name = 1;
256 break;
257 case 'v':
258 verbose = 1;
259 break;
260 default:
261 return ARGP_ERR_UNKNOWN;
262 }
263 return 0;
264}
265
266
267static char *
268more_help (int key, const char *text, void *input)
269{
270 char *tp = NULL;
271 switch (key)
272 {
273 case ARGP_KEY_HELP_EXTRA:
274 /* We print some extra information. */
275 if (asprintf (&tp, gettext ("\
276For bug reporting instructions, please see:\n\
277%s.\n"), REPORT_BUGS_TO) < 0)
278 return NULL;
279 return tp;
280 default:
281 break;
282 }
283 return (char *) text;
284}
285
286
287/* Print the version information. */
288static void
289print_version (FILE *stream, struct argp_state *state)
290{
291 fprintf (stream, "locale %s%s\n", PKGVERSION, VERSION);
292 fprintf (stream, gettext ("\
293Copyright (C) %s Free Software Foundation, Inc.\n\
294This is free software; see the source for copying conditions. There is NO\n\
295warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
296"), "2023");
297 fprintf (stream, gettext ("Written by %s.\n"), "Ulrich Drepper");
298}
299
300
301/* Simple action function which prints arguments as strings. */
302static void
303print_names (const void *nodep, VISIT value, int level)
304{
305 if (value == postorder || value == leaf)
306 puts (*(char **) nodep);
307}
308
309
310static int
311select_dirs (const struct dirent *dirent)
312{
313 int result = 0;
314
315 if (strcmp (dirent->d_name, ".") != 0 && strcmp (dirent->d_name, "..") != 0)
316 {
317 mode_t mode = 0;
318
319 if (dirent->d_type != DT_UNKNOWN && dirent->d_type != DT_LNK)
320 mode = DTTOIF (dirent->d_type);
321 else
322 {
323 struct stat64 st;
324 char buf[sizeof (COMPLOCALEDIR)
325 + strlen (dirent->d_name) + 1];
326
327 stpcpy (stpcpy (stpcpy (buf, COMPLOCALEDIR), "/"),
328 dirent->d_name);
329
330 if (stat64 (buf, &st) == 0)
331 mode = st.st_mode;
332 }
333
334 result = S_ISDIR (mode);
335 }
336
337 return result;
338}
339
340
341static void
342print_LC_IDENTIFICATION (void *mapped, size_t size)
343{
344 /* Read the information from the file. */
345 struct
346 {
347 unsigned int magic;
348 unsigned int nstrings;
349 unsigned int strindex[0];
350 } *filedata = mapped;
351
352 if (filedata->magic == LIMAGIC (LC_IDENTIFICATION)
353 && (sizeof *filedata
354 + (filedata->nstrings
355 * sizeof (unsigned int))
356 <= size))
357 {
358 const char *str;
359
360#define HANDLE(idx, name) \
361 str = ((char *) mapped \
362 + filedata->strindex[_NL_ITEM_INDEX (_NL_IDENTIFICATION_##idx)]); \
363 if (*str != '\0') \
364 printf ("%9s | %s\n", name, str)
365 HANDLE (TITLE, "title");
366 HANDLE (SOURCE, "source");
367 HANDLE (ADDRESS, "address");
368 HANDLE (CONTACT, "contact");
369 HANDLE (EMAIL, "email");
370 HANDLE (TEL, "telephone");
371 HANDLE (FAX, "fax");
372 HANDLE (LANGUAGE, "language");
373 HANDLE (TERRITORY, "territory");
374 HANDLE (AUDIENCE, "audience");
375 HANDLE (APPLICATION, "application");
376 HANDLE (ABBREVIATION, "abbreviation");
377 HANDLE (REVISION, "revision");
378 HANDLE (DATE, "date");
379 }
380}
381
382
383static void
384print_LC_CTYPE (void *mapped, size_t size)
385{
386 struct
387 {
388 unsigned int magic;
389 unsigned int nstrings;
390 unsigned int strindex[0];
391 } *filedata = mapped;
392
393 if (filedata->magic == LIMAGIC (LC_CTYPE)
394 && (sizeof *filedata
395 + (filedata->nstrings
396 * sizeof (unsigned int))
397 <= size))
398 {
399 const char *str;
400
401 str = ((char *) mapped
402 + filedata->strindex[_NL_ITEM_INDEX (_NL_CTYPE_CODESET_NAME)]);
403 if (*str != '\0')
404 printf (" codeset | %s\n", str);
405 }
406}
407
408
409/* Write the names of all available locales to stdout. We have some
410 sources of the information: the contents of the locale directory
411 and the locale.alias file. To avoid duplicates and print the
412 result is a reasonable order we put all entries is a search tree
413 and print them afterwards. */
414static void
415write_locales (void)
416{
417 char linebuf[80];
418 void *all_data = NULL;
419 struct dirent **dirents;
420 int ndirents;
421 int cnt;
422 char *alias_path;
423 size_t alias_path_len;
424 char *entry;
425 int first_locale = 1;
426
427#define PUT(name) tsearch (name, &all_data, \
428 (int (*) (const void *, const void *)) strcoll)
429#define GET(name) tfind (name, &all_data, \
430 (int (*) (const void *, const void *)) strcoll)
431
432 /* `POSIX' locale is always available (POSIX.2 4.34.3). */
433 PUT ("POSIX");
434 /* And so is the "C" locale. */
435 PUT ("C");
436
437 memset (linebuf, '-', sizeof (linebuf) - 1);
438 linebuf[sizeof (linebuf) - 1] = '\0';
439
440 /* First scan the locale archive. */
441 if (write_archive_locales (&all_data, linebuf))
442 first_locale = 0;
443
444 /* Now we can look for all files in the directory. */
445 ndirents = scandir (COMPLOCALEDIR, &dirents, select_dirs,
446 alphasort);
447 for (cnt = 0; cnt < ndirents; ++cnt)
448 {
449 /* Test whether at least the LC_CTYPE data is there. Some
450 directories only contain translations. */
451 char buf[sizeof (COMPLOCALEDIR)
452 + strlen (dirents[cnt]->d_name)
453 + sizeof "/LC_IDENTIFICATION"];
454 char *enddir;
455 struct stat64 st;
456
457 stpcpy (enddir = stpcpy (stpcpy (stpcpy (buf,
458 COMPLOCALEDIR),
459 "/"),
460 dirents[cnt]->d_name),
461 "/LC_IDENTIFICATION");
462
463 if (stat64 (buf, &st) == 0 && S_ISREG (st.st_mode))
464 {
465 if (verbose && GET (dirents[cnt]->d_name) == NULL)
466 {
467 /* Provide some nice output of all kinds of
468 information. */
469 int fd;
470
471 if (! first_locale)
472 putchar_unlocked ('\n');
473 first_locale = 0;
474
475 printf ("locale: %-15.15s directory: %.*s\n%s\n",
476 dirents[cnt]->d_name, (int) (enddir - buf), buf,
477 linebuf);
478
479 fd = open64 (buf, O_RDONLY);
480 if (fd != -1)
481 {
482 void *mapped = mmap64 (NULL, st.st_size, PROT_READ,
483 MAP_SHARED, fd, 0);
484 if (mapped != MAP_FAILED)
485 {
486 print_LC_IDENTIFICATION (mapped, st.st_size);
487
488 munmap (mapped, st.st_size);
489 }
490
491 close (fd);
492
493 /* Now try to get the charset information. */
494 strcpy (enddir, "/LC_CTYPE");
495 fd = open64 (buf, O_RDONLY);
496 if (fd != -1 && fstat64 (fd, &st) >= 0
497 && ((mapped = mmap64 (NULL, st.st_size, PROT_READ,
498 MAP_SHARED, fd, 0))
499 != MAP_FAILED))
500 {
501 print_LC_CTYPE (mapped, st.st_size);
502
503 munmap (mapped, st.st_size);
504 }
505
506 if (fd != -1)
507 close (fd);
508 }
509 }
510
511 /* If the verbose format is not selected we simply
512 collect the names. */
513 PUT (xstrdup (dirents[cnt]->d_name));
514 }
515 }
516 if (ndirents > 0)
517 free (dirents);
518
519 /* Now read the locale.alias files. */
520 if (argz_create_sep (LOCALE_ALIAS_PATH, ':', &alias_path, &alias_path_len))
521 error (1, errno, gettext ("while preparing output"));
522
523 entry = NULL;
524 while ((entry = argz_next (alias_path, alias_path_len, entry)))
525 {
526 static const char aliasfile[] = "/locale.alias";
527 FILE *fp;
528 char full_name[strlen (entry) + sizeof aliasfile];
529
530 stpcpy (stpcpy (full_name, entry), aliasfile);
531 fp = fopen (full_name, "rm");
532 if (fp == NULL)
533 /* Ignore non-existing files. */
534 continue;
535
536 /* No threads present. */
537 __fsetlocking (fp, FSETLOCKING_BYCALLER);
538
539 while (! feof_unlocked (fp))
540 {
541 /* It is a reasonable approach to use a fix buffer here
542 because
543 a) we are only interested in the first two fields
544 b) these fields must be usable as file names and so must
545 not be that long */
546 char buf[BUFSIZ];
547 char *alias;
548 char *value;
549 char *cp;
550
551 if (fgets_unlocked (buf, BUFSIZ, fp) == NULL)
552 /* EOF reached. */
553 break;
554
555 cp = buf;
556 /* Ignore leading white space. */
557 while (isspace (cp[0]) && cp[0] != '\n')
558 ++cp;
559
560 /* A leading '#' signals a comment line. */
561 if (cp[0] != '\0' && cp[0] != '#' && cp[0] != '\n')
562 {
563 alias = cp++;
564 while (cp[0] != '\0' && !isspace (cp[0]))
565 ++cp;
566 /* Terminate alias name. */
567 if (cp[0] != '\0')
568 *cp++ = '\0';
569
570 /* Now look for the beginning of the value. */
571 while (isspace (cp[0]))
572 ++cp;
573
574 if (cp[0] != '\0')
575 {
576 value = cp++;
577 while (cp[0] != '\0' && !isspace (cp[0]))
578 ++cp;
579 /* Terminate value. */
580 if (cp[0] == '\n')
581 {
582 /* This has to be done to make the following
583 test for the end of line possible. We are
584 looking for the terminating '\n' which do not
585 overwrite here. */
586 *cp++ = '\0';
587 *cp = '\n';
588 }
589 else if (cp[0] != '\0')
590 *cp++ = '\0';
591
592 /* Add the alias. */
593 if (! verbose && GET (value) != NULL)
594 PUT (xstrdup (alias));
595 }
596 }
597
598 /* Possibly not the whole line fits into the buffer.
599 Ignore the rest of the line. */
600 while (strchr (cp, '\n') == NULL)
601 {
602 cp = buf;
603 if (fgets_unlocked (buf, BUFSIZ, fp) == NULL)
604 /* Make sure the inner loop will be left. The outer
605 loop will exit at the `feof' test. */
606 *cp = '\n';
607 }
608 }
609
610 fclose (fp);
611 }
612
613 if (! verbose)
614 {
615 twalk (all_data, print_names);
616 }
617}
618
619
620struct nameent
621{
622 char *name;
623 uint32_t locrec_offset;
624};
625
626
627static int
628nameentcmp (const void *a, const void *b)
629{
630 return strcoll (((const struct nameent *) a)->name,
631 ((const struct nameent *) b)->name);
632}
633
634
635static int
636write_archive_locales (void **all_datap, char *linebuf)
637{
638 struct stat64 st;
639 void *all_data = *all_datap;
640 size_t len = 0;
641 struct locarhead *head;
642 struct namehashent *namehashtab;
643 char *addr = MAP_FAILED;
644 int fd, ret = 0;
645 uint32_t cnt;
646
647 fd = open64 (ARCHIVE_NAME, O_RDONLY);
648 if (fd < 0)
649 return 0;
650
651 if (fstat64 (fd, &st) < 0 || st.st_size < sizeof (*head))
652 goto error_out;
653
654 len = st.st_size;
655 addr = mmap64 (NULL, len, PROT_READ, MAP_SHARED, fd, 0);
656 if (addr == MAP_FAILED)
657 goto error_out;
658
659 head = (struct locarhead *) addr;
660 if (head->namehash_offset + head->namehash_size > len
661 || head->string_offset + head->string_size > len
662 || head->locrectab_offset + head->locrectab_size > len
663 || head->sumhash_offset + head->sumhash_size > len)
664 goto error_out;
665
666 namehashtab = (struct namehashent *) (addr + head->namehash_offset);
667 if (! verbose)
668 {
669 for (cnt = 0; cnt < head->namehash_size; ++cnt)
670 if (namehashtab[cnt].locrec_offset != 0)
671 {
672 PUT (xstrdup (addr + namehashtab[cnt].name_offset));
673 ++ret;
674 }
675 }
676 else
677 {
678 struct nameent *names;
679 uint32_t used;
680
681 names = (struct nameent *) xmalloc (head->namehash_used
682 * sizeof (struct nameent));
683 for (cnt = used = 0; cnt < head->namehash_size; ++cnt)
684 if (namehashtab[cnt].locrec_offset != 0)
685 {
686 names[used].name = addr + namehashtab[cnt].name_offset;
687 names[used++].locrec_offset = namehashtab[cnt].locrec_offset;
688 }
689
690 /* Sort the names. */
691 qsort (names, used, sizeof (struct nameent), nameentcmp);
692
693 for (cnt = 0; cnt < used; ++cnt)
694 {
695 struct locrecent *locrec;
696
697 PUT (xstrdup (names[cnt].name));
698
699 if (cnt)
700 putchar_unlocked ('\n');
701
702 printf ("locale: %-15.15s archive: " ARCHIVE_NAME "\n%s\n",
703 names[cnt].name, linebuf);
704
705 locrec = (struct locrecent *) (addr + names[cnt].locrec_offset);
706
707 print_LC_IDENTIFICATION (addr
708 + locrec->record[LC_IDENTIFICATION].offset,
709 locrec->record[LC_IDENTIFICATION].len);
710
711 print_LC_CTYPE (addr + locrec->record[LC_CTYPE].offset,
712 locrec->record[LC_CTYPE].len);
713 }
714
715 free (names);
716
717 ret = used;
718 }
719
720error_out:
721 if (addr != MAP_FAILED)
722 munmap (addr, len);
723 close (fd);
724 *all_datap = all_data;
725 return ret;
726}
727
728
729/* Write the names of all available character maps to stdout. */
730static void
731write_charmaps (void)
732{
733 void *all_data = NULL;
734 CHARMAP_DIR *dir;
735 const char *dirent;
736
737 /* Look for all files in the charmap directory. */
738 dir = charmap_opendir (CHARMAP_PATH);
739 if (dir == NULL)
740 return;
741
742 while ((dirent = charmap_readdir (dir)) != NULL)
743 {
744 char **aliases;
745 char **p;
746
747 PUT (xstrdup (dirent));
748
749 aliases = charmap_aliases (CHARMAP_PATH, dirent);
750
751#if 0
752 /* Add the code_set_name and the aliases. */
753 for (p = aliases; *p; p++)
754 PUT (xstrdup (*p));
755#else
756 /* Add the code_set_name only. Most aliases are obsolete. */
757 p = aliases;
758 if (*p)
759 PUT (xstrdup (*p));
760#endif
761
762 charmap_free_aliases (aliases);
763 }
764
765 charmap_closedir (dir);
766
767 twalk (all_data, print_names);
768}
769
770/* Print a properly quoted assignment of NAME with VAL, using double
771 quotes iff DQUOTE is true. */
772static void
773print_assignment (const char *name, const char *val, bool dquote)
774{
775 printf ("%s=", name);
776 if (dquote)
777 putchar ('"');
778 while (*val != '\0')
779 {
780 size_t segment
781 = strcspn (val, dquote ? "$`\"\\" : "~|&;<>()$`\\\"' \t\n");
782 printf ("%.*s", (int) segment, val);
783 val += segment;
784 if (*val == '\0')
785 break;
786 putchar ('\\');
787 putchar (*val++);
788 }
789 if (dquote)
790 putchar ('"');
791 putchar ('\n');
792}
793
794/* We have to show the contents of the environments determining the
795 locale. */
796static void
797show_locale_vars (void)
798{
799 const char *lcall = getenv ("LC_ALL") ?: "";
800 const char *lang = getenv ("LANG") ?: "";
801
802 /* LANG has to be the first value. */
803 print_assignment ("LANG", lang, false);
804
805 /* Now all categories in an unspecified order. */
806 for (size_t cat_no = 0; cat_no < NCATEGORIES; ++cat_no)
807 if (cat_no != LC_ALL)
808 {
809 const char *name = category[cat_no].name;
810 const char *val = getenv (name);
811
812 if (lcall[0] != '\0' || val == NULL)
813 print_assignment (name,
814 lcall[0] != '\0' ? lcall
815 : lang[0] != '\0' ? lang
816 : "POSIX",
817 true);
818 else
819 print_assignment (name, val, false);
820 }
821
822 /* The last is the LC_ALL value. */
823 print_assignment ("LC_ALL", lcall, false);
824}
825
826
827/* Subroutine of show_info, below. */
828static void
829print_item (struct cat_item *item)
830{
831 switch (item->value_type)
832 {
833 case string:
834 if (show_keyword_name)
835 printf ("%s=\"", item->name);
836 fputs (nl_langinfo (item->item_id) ? : "", stdout);
837 if (show_keyword_name)
838 putchar ('"');
839 putchar ('\n');
840 break;
841 case stringarray:
842 {
843 const char *val;
844 int cnt;
845
846 if (show_keyword_name)
847 printf ("%s=\"", item->name);
848
849 for (cnt = 0; cnt < item->max - 1; ++cnt)
850 {
851 val = nl_langinfo (item->item_id + cnt);
852 if (val != NULL)
853 fputs (val, stdout);
854 putchar (';');
855 }
856
857 val = nl_langinfo (item->item_id + cnt);
858 if (val != NULL)
859 fputs (val, stdout);
860
861 if (show_keyword_name)
862 putchar ('"');
863 putchar ('\n');
864 }
865 break;
866 case stringlist:
867 {
868 int first = 1;
869 const char *val = nl_langinfo (item->item_id) ? : "";
870
871 if (show_keyword_name)
872 printf ("%s=", item->name);
873
874 for (int cnt = 0; cnt < item->max && *val != '\0'; ++cnt)
875 {
876 printf ("%s%s%s%s", first ? "" : ";",
877 show_keyword_name ? "\"" : "", val,
878 show_keyword_name ? "\"" : "");
879 val = strchr (val, '\0') + 1;
880 first = 0;
881 }
882 putchar ('\n');
883 }
884 break;
885 case byte:
886 {
887 const char *val = nl_langinfo (item->item_id);
888
889 if (show_keyword_name)
890 printf ("%s=", item->name);
891
892 if (val != NULL)
893 printf ("%d", *val == '\377' ? -1 : *val);
894 putchar ('\n');
895 }
896 break;
897 case bytearray:
898 {
899 const char *val = nl_langinfo (item->item_id);
900 int cnt = val ? strlen (val) : 0;
901
902 if (show_keyword_name)
903 printf ("%s=", item->name);
904
905 while (cnt > 1)
906 {
907 printf ("%d;", *val == '\177' ? -1 : *val);
908 --cnt;
909 ++val;
910 }
911
912 printf ("%d\n", cnt == 0 || *val == '\177' ? -1 : *val);
913 }
914 break;
915 case word:
916 {
917 union { unsigned int word; char *string; } val;
918 val.string = nl_langinfo (item->item_id);
919 if (show_keyword_name)
920 printf ("%s=", item->name);
921
922 printf ("%d\n", val.word);
923 }
924 break;
925 case wordarray:
926 {
927 int first = 1;
928 union { unsigned int *wordarray; char *string; } val;
929
930 val.string = nl_langinfo (item->item_id);
931 if (show_keyword_name)
932 printf ("%s=", item->name);
933
934 for (int cnt = 0; cnt < item->max; ++cnt)
935 {
936 printf ("%s%d", first ? "" : ";", val.wordarray[cnt]);
937 first = 0;
938 }
939 putchar ('\n');
940 }
941 break;
942 case wstring:
943 case wstringarray:
944 case wstringlist:
945 /* We don't print wide character information since the same
946 information is available in a multibyte string. */
947 default:
948 break;
949 }
950}
951
952/* Show the information request for NAME. */
953static void
954show_info (const char *name)
955{
956 for (size_t cat_no = 0; cat_no < NCATEGORIES; ++cat_no)
957 if (cat_no != LC_ALL)
958 {
959 if (strcmp (name, category[cat_no].name) == 0)
960 /* Print the whole category. */
961 {
962 if (show_category_name != 0)
963 puts (category[cat_no].name);
964
965 for (size_t item_no = 0;
966 item_no < category[cat_no].number;
967 ++item_no)
968 print_item (&category[cat_no].item_desc[item_no]);
969
970 return;
971 }
972
973 for (size_t item_no = 0; item_no < category[cat_no].number; ++item_no)
974 if (strcmp (name, category[cat_no].item_desc[item_no].name) == 0)
975 {
976 if (show_category_name != 0)
977 puts (category[cat_no].name);
978
979 print_item (&category[cat_no].item_desc[item_no]);
980 return;
981 }
982 }
983
984 /* The name is not a standard one.
985 For testing and perhaps advanced use allow some more symbols. */
986 locale_special (name, show_category_name, show_keyword_name);
987}
988
989/* Set to true by try_setlocale if setlocale fails. Used by
990 setlocale_diagnostics. */
991static bool setlocale_failed;
992
993/* Call setlocale, with non-fatal error reporting. */
994static void
995try_setlocale (int category, const char *category_name)
996{
997 if (setlocale (category, "") == NULL)
998 {
999 error (0, errno, gettext ("Cannot set %s to default locale"),
1000 category_name);
1001 setlocale_failed = true;
1002 }
1003}
1004
1005/* Return a quoted version of the passed string, or NULL on error. */
1006static char *
1007quote_string (const char *input)
1008{
1009 char *buffer;
1010 size_t length;
1011 FILE *stream = open_memstream (&buffer, &length);
1012 if (stream == NULL)
1013 return NULL;
1014
1015 while (true)
1016 {
1017 unsigned char ch = *input++;
1018 if (ch == '\0')
1019 break;
1020
1021 /* Use C backslash escapes for those control characters for
1022 which they are defined. */
1023 switch (ch)
1024 {
1025 case '\a':
1026 putc_unlocked ('\\', stream);
1027 putc_unlocked ('a', stream);
1028 break;
1029 case '\b':
1030 putc_unlocked ('\\', stream);
1031 putc_unlocked ('b', stream);
1032 break;
1033 case '\f':
1034 putc_unlocked ('\\', stream);
1035 putc_unlocked ('f', stream);
1036 break;
1037 case '\n':
1038 putc_unlocked ('\\', stream);
1039 putc_unlocked ('n', stream);
1040 break;
1041 case '\r':
1042 putc_unlocked ('\\', stream);
1043 putc_unlocked ('r', stream);
1044 break;
1045 case '\t':
1046 putc_unlocked ('\\', stream);
1047 putc_unlocked ('t', stream);
1048 break;
1049 case '\v':
1050 putc_unlocked ('\\', stream);
1051 putc_unlocked ('v', stream);
1052 break;
1053 case '\\':
1054 case '\'':
1055 case '\"':
1056 putc_unlocked ('\\', stream);
1057 putc_unlocked (ch, stream);
1058 break;
1059 default:
1060 if (ch < ' ' || ch > '~')
1061 /* Use octal sequences because they are fixed width,
1062 unlike hexadecimal sequences. */
1063 fprintf (stream, "\\%03o", ch);
1064 else
1065 putc_unlocked (ch, stream);
1066 }
1067 }
1068
1069 if (ferror (stream))
1070 {
1071 fclose (stream);
1072 free (buffer);
1073 return NULL;
1074 }
1075 if (fclose (stream) != 0)
1076 {
1077 free (buffer);
1078 return NULL;
1079 }
1080
1081 return buffer;
1082}
1083
1084/* Print additional information if there was a setlocale error (during
1085 try_setlocale). */
1086static void
1087setlocale_diagnostics (void)
1088{
1089 if (setlocale_failed)
1090 {
1091 const char *locpath = getenv ("LOCPATH");
1092 if (locpath != NULL)
1093 {
1094 char *quoted = quote_string (locpath);
1095 if (quoted != NULL)
1096 fprintf (stderr,
1097 gettext ("\
1098warning: The LOCPATH variable is set to \"%s\"\n"),
1099 quoted);
1100 else
1101 fputs ("warning: The LOCPATH variable is set\n", stderr);
1102 free (quoted);
1103 }
1104 }
1105}
1106