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ubuntu-buildroot/output/build/glibc-2.36-81-g4f4d7a13edfd.../locale/programs/locale.c

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/* Implementation of the locale program according to POSIX 9945-2.
Copyright (C) 1995-2022 Free Software Foundation, Inc.
This file is part of the GNU C Library.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
by the Free Software Foundation; version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, see <https://www.gnu.org/licenses/>. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <argp.h>
#include <argz.h>
#include <dirent.h>
#include <errno.h>
#include <error.h>
#include <fcntl.h>
#include <langinfo.h>
#include <libintl.h>
#include <limits.h>
#include <locale.h>
#include <search.h>
#include <stdio.h>
#include <stdio_ext.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <stdint.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include "record-status.h"
#include "localeinfo.h"
#include "charmap-dir.h"
#include "../locarchive.h"
#include <programs/xmalloc.h>
#define ARCHIVE_NAME COMPLOCALEDIR "/locale-archive"
/* If set print the name of the category. */
static int show_category_name;
/* If set print the name of the item. */
static int show_keyword_name;
/* Print names of all available locales. */
static int do_all;
/* Print names of all available character maps. */
static int do_charmaps = 0;
/* Name and version of program. */
static void print_version (FILE *stream, struct argp_state *state);
void (*argp_program_version_hook) (FILE *, struct argp_state *) = print_version;
/* Definitions of arguments for argp functions. */
static const struct argp_option options[] =
{
{ NULL, 0, NULL, 0, N_("System information:") },
{ "all-locales", 'a', NULL, OPTION_NO_USAGE,
N_("Write names of available locales") },
{ "charmaps", 'm', NULL, OPTION_NO_USAGE,
N_("Write names of available charmaps") },
{ NULL, 0, NULL, 0, N_("Modify output format:") },
{ "category-name", 'c', NULL, 0, N_("Write names of selected categories") },
{ "keyword-name", 'k', NULL, 0, N_("Write names of selected keywords") },
{ "verbose", 'v', NULL, 0, N_("Print more information") },
{ NULL, 0, NULL, 0, NULL }
};
/* Short description of program. */
static const char doc[] = N_("Get locale-specific information.");
/* Strings for arguments in help texts. */
static const char args_doc[] = N_("NAME\n[-a|-m]");
/* Prototype for option handler. */
static error_t parse_opt (int key, char *arg, struct argp_state *state);
/* Function to print some extra text in the help message. */
static char *more_help (int key, const char *text, void *input);
/* Data structure to communicate with argp functions. */
static struct argp argp =
{
options, parse_opt, args_doc, doc, NULL, more_help
};
/* We don't have these constants defined because we don't use them. Give
default values. */
#define CTYPE_MB_CUR_MIN 0
#define CTYPE_MB_CUR_MAX 0
#define CTYPE_HASH_SIZE 0
#define CTYPE_HASH_LAYERS 0
#define CTYPE_CLASS 0
#define CTYPE_TOUPPER_EB 0
#define CTYPE_TOLOWER_EB 0
#define CTYPE_TOUPPER_EL 0
#define CTYPE_TOLOWER_EL 0
/* Definition of the data structure which represents a category and its
items. */
struct category
{
int cat_id;
const char *name;
size_t number;
struct cat_item
{
int item_id;
const char *name;
enum { std, opt } status;
enum value_type value_type;
int min;
int max;
} *item_desc;
};
/* Simple helper macro. */
#define NELEMS(arr) ((sizeof (arr)) / (sizeof (arr[0])))
/* For some tricky stuff. */
#define NO_PAREN(Item, More...) Item, ## More
/* We have all categories defined in `categories.def'. Now construct
the description and data structure used for all categories. */
#define DEFINE_ELEMENT(Item, More...) { Item, ## More },
#define DEFINE_CATEGORY(category, name, items, postload) \
static struct cat_item category##_desc[] = \
{ \
NO_PAREN items \
};
#include "categories.def"
#undef DEFINE_CATEGORY
static struct category category[] =
{
#define DEFINE_CATEGORY(category, name, items, postload) \
[category] = { _NL_NUM_##category, name, NELEMS (category##_desc), \
category##_desc },
#include "categories.def"
#undef DEFINE_CATEGORY
};
#define NCATEGORIES NELEMS (category)
/* Automatically set variable. */
extern const char *__progname;
/* helper function for extended name handling. */
extern void locale_special (const char *name, int show_category_name,
int show_keyword_name);
/* Prototypes for local functions. */
static void print_LC_IDENTIFICATION (void *mapped, size_t size);
static void print_LC_CTYPE (void *mapped, size_t size);
static void write_locales (void);
static int nameentcmp (const void *a, const void *b);
static int write_archive_locales (void **all_datap, char *linebuf);
static void write_charmaps (void);
static void show_locale_vars (void);
static void show_info (const char *name);
static void try_setlocale (int category, const char *category_name);
static char *quote_string (const char *input);
static void setlocale_diagnostics (void);
int
main (int argc, char *argv[])
{
int remaining;
/* Set initial values for global variables. */
show_category_name = 0;
show_keyword_name = 0;
/* Set locale. Do not set LC_ALL because the other categories must
not be affected (according to POSIX.2). */
try_setlocale (LC_CTYPE, "LC_CTYPE");
try_setlocale (LC_MESSAGES, "LC_MESSAGES");
/* Initialize the message catalog. */
textdomain (PACKAGE);
/* Parse and process arguments. */
argp_parse (&argp, argc, argv, 0, &remaining, NULL);
/* `-a' requests the names of all available locales. */
if (do_all != 0)
{
setlocale_diagnostics ();
try_setlocale (LC_COLLATE, "LC_COLLATE");
write_locales ();
exit (EXIT_SUCCESS);
}
/* `m' requests the names of all available charmaps. The names can be
used for the -f argument to localedef(1). */
if (do_charmaps != 0)
{
setlocale_diagnostics ();
write_charmaps ();
exit (EXIT_SUCCESS);
}
/* Specific information about the current locale are requested.
Change to this locale now. */
try_setlocale (LC_ALL, "LC_ALL");
setlocale_diagnostics ();
/* If no real argument is given we have to print the contents of the
current locale definition variables. These are LANG and the LC_*. */
if (remaining == argc && show_keyword_name == 0 && show_category_name == 0)
{
show_locale_vars ();
exit (EXIT_SUCCESS);
}
/* Process all given names. */
while (remaining < argc)
show_info (argv[remaining++]);
exit (EXIT_SUCCESS);
}
/* Handle program arguments. */
static error_t
parse_opt (int key, char *arg, struct argp_state *state)
{
switch (key)
{
case 'a':
do_all = 1;
break;
case 'c':
show_category_name = 1;
break;
case 'm':
do_charmaps = 1;
break;
case 'k':
show_keyword_name = 1;
break;
case 'v':
verbose = 1;
break;
default:
return ARGP_ERR_UNKNOWN;
}
return 0;
}
static char *
more_help (int key, const char *text, void *input)
{
char *tp = NULL;
switch (key)
{
case ARGP_KEY_HELP_EXTRA:
/* We print some extra information. */
if (asprintf (&tp, gettext ("\
For bug reporting instructions, please see:\n\
%s.\n"), REPORT_BUGS_TO) < 0)
return NULL;
return tp;
default:
break;
}
return (char *) text;
}
/* Print the version information. */
static void
print_version (FILE *stream, struct argp_state *state)
{
fprintf (stream, "locale %s%s\n", PKGVERSION, VERSION);
fprintf (stream, gettext ("\
Copyright (C) %s Free Software Foundation, Inc.\n\
This is free software; see the source for copying conditions. There is NO\n\
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\
"), "2022");
fprintf (stream, gettext ("Written by %s.\n"), "Ulrich Drepper");
}
/* Simple action function which prints arguments as strings. */
static void
print_names (const void *nodep, VISIT value, int level)
{
if (value == postorder || value == leaf)
puts (*(char **) nodep);
}
static int
select_dirs (const struct dirent *dirent)
{
int result = 0;
if (strcmp (dirent->d_name, ".") != 0 && strcmp (dirent->d_name, "..") != 0)
{
mode_t mode = 0;
if (dirent->d_type != DT_UNKNOWN && dirent->d_type != DT_LNK)
mode = DTTOIF (dirent->d_type);
else
{
struct stat64 st;
char buf[sizeof (COMPLOCALEDIR)
+ strlen (dirent->d_name) + 1];
stpcpy (stpcpy (stpcpy (buf, COMPLOCALEDIR), "/"),
dirent->d_name);
if (stat64 (buf, &st) == 0)
mode = st.st_mode;
}
result = S_ISDIR (mode);
}
return result;
}
static void
print_LC_IDENTIFICATION (void *mapped, size_t size)
{
/* Read the information from the file. */
struct
{
unsigned int magic;
unsigned int nstrings;
unsigned int strindex[0];
} *filedata = mapped;
if (filedata->magic == LIMAGIC (LC_IDENTIFICATION)
&& (sizeof *filedata
+ (filedata->nstrings
* sizeof (unsigned int))
<= size))
{
const char *str;
#define HANDLE(idx, name) \
str = ((char *) mapped \
+ filedata->strindex[_NL_ITEM_INDEX (_NL_IDENTIFICATION_##idx)]); \
if (*str != '\0') \
printf ("%9s | %s\n", name, str)
HANDLE (TITLE, "title");
HANDLE (SOURCE, "source");
HANDLE (ADDRESS, "address");
HANDLE (CONTACT, "contact");
HANDLE (EMAIL, "email");
HANDLE (TEL, "telephone");
HANDLE (FAX, "fax");
HANDLE (LANGUAGE, "language");
HANDLE (TERRITORY, "territory");
HANDLE (AUDIENCE, "audience");
HANDLE (APPLICATION, "application");
HANDLE (ABBREVIATION, "abbreviation");
HANDLE (REVISION, "revision");
HANDLE (DATE, "date");
}
}
static void
print_LC_CTYPE (void *mapped, size_t size)
{
struct
{
unsigned int magic;
unsigned int nstrings;
unsigned int strindex[0];
} *filedata = mapped;
if (filedata->magic == LIMAGIC (LC_CTYPE)
&& (sizeof *filedata
+ (filedata->nstrings
* sizeof (unsigned int))
<= size))
{
const char *str;
str = ((char *) mapped
+ filedata->strindex[_NL_ITEM_INDEX (_NL_CTYPE_CODESET_NAME)]);
if (*str != '\0')
printf (" codeset | %s\n", str);
}
}
/* Write the names of all available locales to stdout. We have some
sources of the information: the contents of the locale directory
and the locale.alias file. To avoid duplicates and print the
result is a reasonable order we put all entries is a search tree
and print them afterwards. */
static void
write_locales (void)
{
char linebuf[80];
void *all_data = NULL;
struct dirent **dirents;
int ndirents;
int cnt;
char *alias_path;
size_t alias_path_len;
char *entry;
int first_locale = 1;
#define PUT(name) tsearch (name, &all_data, \
(int (*) (const void *, const void *)) strcoll)
#define GET(name) tfind (name, &all_data, \
(int (*) (const void *, const void *)) strcoll)
/* `POSIX' locale is always available (POSIX.2 4.34.3). */
PUT ("POSIX");
/* And so is the "C" locale. */
PUT ("C");
memset (linebuf, '-', sizeof (linebuf) - 1);
linebuf[sizeof (linebuf) - 1] = '\0';
/* First scan the locale archive. */
if (write_archive_locales (&all_data, linebuf))
first_locale = 0;
/* Now we can look for all files in the directory. */
ndirents = scandir (COMPLOCALEDIR, &dirents, select_dirs,
alphasort);
for (cnt = 0; cnt < ndirents; ++cnt)
{
/* Test whether at least the LC_CTYPE data is there. Some
directories only contain translations. */
char buf[sizeof (COMPLOCALEDIR)
+ strlen (dirents[cnt]->d_name)
+ sizeof "/LC_IDENTIFICATION"];
char *enddir;
struct stat64 st;
stpcpy (enddir = stpcpy (stpcpy (stpcpy (buf,
COMPLOCALEDIR),
"/"),
dirents[cnt]->d_name),
"/LC_IDENTIFICATION");
if (stat64 (buf, &st) == 0 && S_ISREG (st.st_mode))
{
if (verbose && GET (dirents[cnt]->d_name) == NULL)
{
/* Provide some nice output of all kinds of
information. */
int fd;
if (! first_locale)
putchar_unlocked ('\n');
first_locale = 0;
printf ("locale: %-15.15s directory: %.*s\n%s\n",
dirents[cnt]->d_name, (int) (enddir - buf), buf,
linebuf);
fd = open64 (buf, O_RDONLY);
if (fd != -1)
{
void *mapped = mmap64 (NULL, st.st_size, PROT_READ,
MAP_SHARED, fd, 0);
if (mapped != MAP_FAILED)
{
print_LC_IDENTIFICATION (mapped, st.st_size);
munmap (mapped, st.st_size);
}
close (fd);
/* Now try to get the charset information. */
strcpy (enddir, "/LC_CTYPE");
fd = open64 (buf, O_RDONLY);
if (fd != -1 && fstat64 (fd, &st) >= 0
&& ((mapped = mmap64 (NULL, st.st_size, PROT_READ,
MAP_SHARED, fd, 0))
!= MAP_FAILED))
{
print_LC_CTYPE (mapped, st.st_size);
munmap (mapped, st.st_size);
}
if (fd != -1)
close (fd);
}
}
/* If the verbose format is not selected we simply
collect the names. */
PUT (xstrdup (dirents[cnt]->d_name));
}
}
if (ndirents > 0)
free (dirents);
/* Now read the locale.alias files. */
if (argz_create_sep (LOCALE_ALIAS_PATH, ':', &alias_path, &alias_path_len))
error (1, errno, gettext ("while preparing output"));
entry = NULL;
while ((entry = argz_next (alias_path, alias_path_len, entry)))
{
static const char aliasfile[] = "/locale.alias";
FILE *fp;
char full_name[strlen (entry) + sizeof aliasfile];
stpcpy (stpcpy (full_name, entry), aliasfile);
fp = fopen (full_name, "rm");
if (fp == NULL)
/* Ignore non-existing files. */
continue;
/* No threads present. */
__fsetlocking (fp, FSETLOCKING_BYCALLER);
while (! feof_unlocked (fp))
{
/* It is a reasonable approach to use a fix buffer here
because
a) we are only interested in the first two fields
b) these fields must be usable as file names and so must
not be that long */
char buf[BUFSIZ];
char *alias;
char *value;
char *cp;
if (fgets_unlocked (buf, BUFSIZ, fp) == NULL)
/* EOF reached. */
break;
cp = buf;
/* Ignore leading white space. */
while (isspace (cp[0]) && cp[0] != '\n')
++cp;
/* A leading '#' signals a comment line. */
if (cp[0] != '\0' && cp[0] != '#' && cp[0] != '\n')
{
alias = cp++;
while (cp[0] != '\0' && !isspace (cp[0]))
++cp;
/* Terminate alias name. */
if (cp[0] != '\0')
*cp++ = '\0';
/* Now look for the beginning of the value. */
while (isspace (cp[0]))
++cp;
if (cp[0] != '\0')
{
value = cp++;
while (cp[0] != '\0' && !isspace (cp[0]))
++cp;
/* Terminate value. */
if (cp[0] == '\n')
{
/* This has to be done to make the following
test for the end of line possible. We are
looking for the terminating '\n' which do not
overwrite here. */
*cp++ = '\0';
*cp = '\n';
}
else if (cp[0] != '\0')
*cp++ = '\0';
/* Add the alias. */
if (! verbose && GET (value) != NULL)
PUT (xstrdup (alias));
}
}
/* Possibly not the whole line fits into the buffer.
Ignore the rest of the line. */
while (strchr (cp, '\n') == NULL)
{
cp = buf;
if (fgets_unlocked (buf, BUFSIZ, fp) == NULL)
/* Make sure the inner loop will be left. The outer
loop will exit at the `feof' test. */
*cp = '\n';
}
}
fclose (fp);
}
if (! verbose)
{
twalk (all_data, print_names);
}
}
struct nameent
{
char *name;
uint32_t locrec_offset;
};
static int
nameentcmp (const void *a, const void *b)
{
return strcoll (((const struct nameent *) a)->name,
((const struct nameent *) b)->name);
}
static int
write_archive_locales (void **all_datap, char *linebuf)
{
struct stat64 st;
void *all_data = *all_datap;
size_t len = 0;
struct locarhead *head;
struct namehashent *namehashtab;
char *addr = MAP_FAILED;
int fd, ret = 0;
uint32_t cnt;
fd = open64 (ARCHIVE_NAME, O_RDONLY);
if (fd < 0)
return 0;
if (fstat64 (fd, &st) < 0 || st.st_size < sizeof (*head))
goto error_out;
len = st.st_size;
addr = mmap64 (NULL, len, PROT_READ, MAP_SHARED, fd, 0);
if (addr == MAP_FAILED)
goto error_out;
head = (struct locarhead *) addr;
if (head->namehash_offset + head->namehash_size > len
|| head->string_offset + head->string_size > len
|| head->locrectab_offset + head->locrectab_size > len
|| head->sumhash_offset + head->sumhash_size > len)
goto error_out;
namehashtab = (struct namehashent *) (addr + head->namehash_offset);
if (! verbose)
{
for (cnt = 0; cnt < head->namehash_size; ++cnt)
if (namehashtab[cnt].locrec_offset != 0)
{
PUT (xstrdup (addr + namehashtab[cnt].name_offset));
++ret;
}
}
else
{
struct nameent *names;
uint32_t used;
names = (struct nameent *) xmalloc (head->namehash_used
* sizeof (struct nameent));
for (cnt = used = 0; cnt < head->namehash_size; ++cnt)
if (namehashtab[cnt].locrec_offset != 0)
{
names[used].name = addr + namehashtab[cnt].name_offset;
names[used++].locrec_offset = namehashtab[cnt].locrec_offset;
}
/* Sort the names. */
qsort (names, used, sizeof (struct nameent), nameentcmp);
for (cnt = 0; cnt < used; ++cnt)
{
struct locrecent *locrec;
PUT (xstrdup (names[cnt].name));
if (cnt)
putchar_unlocked ('\n');
printf ("locale: %-15.15s archive: " ARCHIVE_NAME "\n%s\n",
names[cnt].name, linebuf);
locrec = (struct locrecent *) (addr + names[cnt].locrec_offset);
print_LC_IDENTIFICATION (addr
+ locrec->record[LC_IDENTIFICATION].offset,
locrec->record[LC_IDENTIFICATION].len);
print_LC_CTYPE (addr + locrec->record[LC_CTYPE].offset,
locrec->record[LC_CTYPE].len);
}
free (names);
ret = used;
}
error_out:
if (addr != MAP_FAILED)
munmap (addr, len);
close (fd);
*all_datap = all_data;
return ret;
}
/* Write the names of all available character maps to stdout. */
static void
write_charmaps (void)
{
void *all_data = NULL;
CHARMAP_DIR *dir;
const char *dirent;
/* Look for all files in the charmap directory. */
dir = charmap_opendir (CHARMAP_PATH);
if (dir == NULL)
return;
while ((dirent = charmap_readdir (dir)) != NULL)
{
char **aliases;
char **p;
PUT (xstrdup (dirent));
aliases = charmap_aliases (CHARMAP_PATH, dirent);
#if 0
/* Add the code_set_name and the aliases. */
for (p = aliases; *p; p++)
PUT (xstrdup (*p));
#else
/* Add the code_set_name only. Most aliases are obsolete. */
p = aliases;
if (*p)
PUT (xstrdup (*p));
#endif
charmap_free_aliases (aliases);
}
charmap_closedir (dir);
twalk (all_data, print_names);
}
/* Print a properly quoted assignment of NAME with VAL, using double
quotes iff DQUOTE is true. */
static void
print_assignment (const char *name, const char *val, bool dquote)
{
printf ("%s=", name);
if (dquote)
putchar ('"');
while (*val != '\0')
{
size_t segment
= strcspn (val, dquote ? "$`\"\\" : "~|&;<>()$`\\\"' \t\n");
printf ("%.*s", (int) segment, val);
val += segment;
if (*val == '\0')
break;
putchar ('\\');
putchar (*val++);
}
if (dquote)
putchar ('"');
putchar ('\n');
}
/* We have to show the contents of the environments determining the
locale. */
static void
show_locale_vars (void)
{
const char *lcall = getenv ("LC_ALL") ?: "";
const char *lang = getenv ("LANG") ?: "";
/* LANG has to be the first value. */
print_assignment ("LANG", lang, false);
/* Now all categories in an unspecified order. */
for (size_t cat_no = 0; cat_no < NCATEGORIES; ++cat_no)
if (cat_no != LC_ALL)
{
const char *name = category[cat_no].name;
const char *val = getenv (name);
if (lcall[0] != '\0' || val == NULL)
print_assignment (name,
lcall[0] != '\0' ? lcall
: lang[0] != '\0' ? lang
: "POSIX",
true);
else
print_assignment (name, val, false);
}
/* The last is the LC_ALL value. */
print_assignment ("LC_ALL", lcall, false);
}
/* Subroutine of show_info, below. */
static void
print_item (struct cat_item *item)
{
switch (item->value_type)
{
case string:
if (show_keyword_name)
printf ("%s=\"", item->name);
fputs (nl_langinfo (item->item_id) ? : "", stdout);
if (show_keyword_name)
putchar ('"');
putchar ('\n');
break;
case stringarray:
{
const char *val;
int cnt;
if (show_keyword_name)
printf ("%s=\"", item->name);
for (cnt = 0; cnt < item->max - 1; ++cnt)
{
val = nl_langinfo (item->item_id + cnt);
if (val != NULL)
fputs (val, stdout);
putchar (';');
}
val = nl_langinfo (item->item_id + cnt);
if (val != NULL)
fputs (val, stdout);
if (show_keyword_name)
putchar ('"');
putchar ('\n');
}
break;
case stringlist:
{
int first = 1;
const char *val = nl_langinfo (item->item_id) ? : "";
if (show_keyword_name)
printf ("%s=", item->name);
for (int cnt = 0; cnt < item->max && *val != '\0'; ++cnt)
{
printf ("%s%s%s%s", first ? "" : ";",
show_keyword_name ? "\"" : "", val,
show_keyword_name ? "\"" : "");
val = strchr (val, '\0') + 1;
first = 0;
}
putchar ('\n');
}
break;
case byte:
{
const char *val = nl_langinfo (item->item_id);
if (show_keyword_name)
printf ("%s=", item->name);
if (val != NULL)
printf ("%d", *val == '\377' ? -1 : *val);
putchar ('\n');
}
break;
case bytearray:
{
const char *val = nl_langinfo (item->item_id);
int cnt = val ? strlen (val) : 0;
if (show_keyword_name)
printf ("%s=", item->name);
while (cnt > 1)
{
printf ("%d;", *val == '\177' ? -1 : *val);
--cnt;
++val;
}
printf ("%d\n", cnt == 0 || *val == '\177' ? -1 : *val);
}
break;
case word:
{
union { unsigned int word; char *string; } val;
val.string = nl_langinfo (item->item_id);
if (show_keyword_name)
printf ("%s=", item->name);
printf ("%d\n", val.word);
}
break;
case wordarray:
{
int first = 1;
union { unsigned int *wordarray; char *string; } val;
val.string = nl_langinfo (item->item_id);
if (show_keyword_name)
printf ("%s=", item->name);
for (int cnt = 0; cnt < item->max; ++cnt)
{
printf ("%s%d", first ? "" : ";", val.wordarray[cnt]);
first = 0;
}
putchar ('\n');
}
break;
case wstring:
case wstringarray:
case wstringlist:
/* We don't print wide character information since the same
information is available in a multibyte string. */
default:
break;
}
}
/* Show the information request for NAME. */
static void
show_info (const char *name)
{
for (size_t cat_no = 0; cat_no < NCATEGORIES; ++cat_no)
if (cat_no != LC_ALL)
{
if (strcmp (name, category[cat_no].name) == 0)
/* Print the whole category. */
{
if (show_category_name != 0)
puts (category[cat_no].name);
for (size_t item_no = 0;
item_no < category[cat_no].number;
++item_no)
print_item (&category[cat_no].item_desc[item_no]);
return;
}
for (size_t item_no = 0; item_no < category[cat_no].number; ++item_no)
if (strcmp (name, category[cat_no].item_desc[item_no].name) == 0)
{
if (show_category_name != 0)
puts (category[cat_no].name);
print_item (&category[cat_no].item_desc[item_no]);
return;
}
}
/* The name is not a standard one.
For testing and perhaps advanced use allow some more symbols. */
locale_special (name, show_category_name, show_keyword_name);
}
/* Set to true by try_setlocale if setlocale fails. Used by
setlocale_diagnostics. */
static bool setlocale_failed;
/* Call setlocale, with non-fatal error reporting. */
static void
try_setlocale (int category, const char *category_name)
{
if (setlocale (category, "") == NULL)
{
error (0, errno, gettext ("Cannot set %s to default locale"),
category_name);
setlocale_failed = true;
}
}
/* Return a quoted version of the passed string, or NULL on error. */
static char *
quote_string (const char *input)
{
char *buffer;
size_t length;
FILE *stream = open_memstream (&buffer, &length);
if (stream == NULL)
return NULL;
while (true)
{
unsigned char ch = *input++;
if (ch == '\0')
break;
/* Use C backslash escapes for those control characters for
which they are defined. */
switch (ch)
{
case '\a':
putc_unlocked ('\\', stream);
putc_unlocked ('a', stream);
break;
case '\b':
putc_unlocked ('\\', stream);
putc_unlocked ('b', stream);
break;
case '\f':
putc_unlocked ('\\', stream);
putc_unlocked ('f', stream);
break;
case '\n':
putc_unlocked ('\\', stream);
putc_unlocked ('n', stream);
break;
case '\r':
putc_unlocked ('\\', stream);
putc_unlocked ('r', stream);
break;
case '\t':
putc_unlocked ('\\', stream);
putc_unlocked ('t', stream);
break;
case '\v':
putc_unlocked ('\\', stream);
putc_unlocked ('v', stream);
break;
case '\\':
case '\'':
case '\"':
putc_unlocked ('\\', stream);
putc_unlocked (ch, stream);
break;
default:
if (ch < ' ' || ch > '~')
/* Use octal sequences because they are fixed width,
unlike hexadecimal sequences. */
fprintf (stream, "\\%03o", ch);
else
putc_unlocked (ch, stream);
}
}
if (ferror (stream))
{
fclose (stream);
free (buffer);
return NULL;
}
if (fclose (stream) != 0)
{
free (buffer);
return NULL;
}
return buffer;
}
/* Print additional information if there was a setlocale error (during
try_setlocale). */
static void
setlocale_diagnostics (void)
{
if (setlocale_failed)
{
const char *locpath = getenv ("LOCPATH");
if (locpath != NULL)
{
char *quoted = quote_string (locpath);
if (quoted != NULL)
fprintf (stderr,
gettext ("\
warning: The LOCPATH variable is set to \"%s\"\n"),
quoted);
else
fputs ("warning: The LOCPATH variable is set\n", stderr);
free (quoted);
}
}
}
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