Branch
Hash :
e21236c3
Author :
Date :
2025-02-20T16:09:49
*_l: Fix mistake. * lib/is_l-impl.h (FUNC): Fix array index on old NetBSD and OpenBSD. * lib/to_l-impl.h (FUNC): Likewise. * lib/strcasecmp_l.c (strcasecmp_l): Likewise. * lib/strncasecmp_l.c (strncasecmp_l): Likewise. * lib/strerror_l.c (strerror_l_r): Likewise.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222
/* Internationalized description of system error code.
Copyright (C) 2025 Free Software Foundation, Inc.
This file is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
This file 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
/* Written by Bruno Haible <bruno@clisp.org>, 2025. */
#include <config.h>
/* Specification. */
#include <string.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "at-init.h"
#include "errno-iter.h"
#include "glthread/tls.h"
#include "glthread/once.h"
/* Minimum and maximum valid errno value (other than 0). */
static int errno_min;
static int errno_max;
/* Array of descriptions of system error codes in the "C" locale.
Note: Such a linear array would not work
- on GNU/Hurd, where errno_min = -309, errno_max = 1073741945,
- on Haiku, where errno_min = -2147483648, errno_max = 2016. */
static char **c_error_strings;
/* We need to initialize them before main() is entered, because main() often
contains a call to setlocale(). */
AT_INIT (init_c_error_strings);
#ifdef __SUNPRO_C
# pragma init (init_c_error_strings)
#endif
static int
errno_minmax_callback (void *data, int err)
{
if (err < errno_min)
errno_min = err;
if (err > errno_max)
errno_max = err;
return 0;
}
static int
errno_string_callback (void *data, int err)
{
char *s = strerror (err);
if (s != NULL && *s != '\0')
c_error_strings[err - errno_min] = strdup (s);
return 0;
}
/* Initializes errno_min, errno_max, c_error_strings. */
static void
init_c_error_strings (void)
{
/* Compute errno_min, errno_max. */
errno_min = errno_max = EDOM;
errno_iterate (errno_minmax_callback, NULL);
#if 0 /* for debugging */
{
char buf[80];
sprintf (buf, "min.errno = %d\nmax.errno = %d\n", errno_min, errno_max);
write (STDOUT_FILENO, buf, strlen (buf));
}
#endif
/* Allocate memory for c_error_strings. */
c_error_strings =
(char **) calloc (errno_max - errno_min + 1, sizeof (char *));
/* Fetch the descriptions of system error codes. */
if (c_error_strings != NULL)
errno_iterate (errno_string_callback, NULL);
}
#if GNULIB_defined_locale_t
/* Copy as much of MSG into BUF as possible, without corrupting errno.
Return 0 if MSG fit in BUFLEN, otherwise return ERANGE. */
static int
safe_copy (char *buf, size_t buflen, const char *msg)
{
size_t len = strlen (msg);
size_t moved = len < buflen ? len : buflen - 1;
/* Although POSIX lets memmove corrupt errno, we don't
know of any implementation where this is a real problem. */
memmove (buf, msg, moved);
buf[moved] = '\0';
return len < buflen ? 0 : ERANGE;
}
#endif
int
strerror_l_r (int errnum, char *buf, size_t buflen, locale_t locale)
{
int ret;
int saved_errno = errno;
#if GNULIB_defined_locale_t
struct gl_locale_category_t *plc =
&locale->category[gl_log2_lcmask_to_index (gl_log2_lc_mask (LC_MESSAGES))];
if (plc->is_c_locale)
{
/* Implementation for the "C" locale. */
char stackbuf[80];
char *s;
if (errnum == 0)
s = "No error";
else
{
if (errnum >= errno_min && errnum <= errno_max
&& c_error_strings != NULL)
s = c_error_strings[errnum - errno_min];
else
s = NULL;
if (s == NULL)
{
# if defined __HAIKU__
/* For consistency with perror(). */
sprintf (stackbuf, "Unknown Application Error (%d)", errnum);
# else
sprintf (stackbuf, "Unknown error %d", errnum);
# endif
s = stackbuf;
}
}
ret = safe_copy (buf, buflen, s);
}
else
{
/* Implementation for the global locale. */
# if HAVE_WORKING_USELOCALE
locale_t saved_locale = uselocale (LC_GLOBAL_LOCALE);
# endif
ret = strerror_r (errnum, buf, buflen);
# if HAVE_WORKING_USELOCALE
uselocale (saved_locale);
# endif
}
#else
# if HAVE_WORKING_USELOCALE
locale_t saved_locale = uselocale (locale);
# endif
ret = strerror_r (errnum, buf, buflen);
# if HAVE_WORKING_USELOCALE
uselocale (saved_locale);
# endif
#endif
if (ret == 0)
errno = saved_errno;
return ret;
}
/* Maximum supported size of an error code description. */
#define RESULT_MAX_SIZE 200
static gl_tls_key_t result_key; /* TLS key for a 'char *' */
static void
key_init (void)
{
gl_tls_key_init (result_key, free);
/* The per-thread initial value is NULL. */
}
/* Ensure that key_init is called once only. */
gl_once_define(static, key_init_once)
char *
strerror_l (int errnum, locale_t locale)
{
int saved_errno = errno;
/* Call strerror_l_r, returning the string in thread-local storage. */
gl_once (key_init_once, key_init);
char *result = gl_tls_get (result_key);
if (result == NULL)
{
result = malloc (RESULT_MAX_SIZE);
if (result == NULL)
{
errno = ENOMEM;
return NULL;
}
gl_tls_set (result_key, result);
}
int ret = strerror_l_r (errnum, result, RESULT_MAX_SIZE, locale);
if (ret == 0)
{
errno = saved_errno;
return result;
}
else
return NULL;
}