sysdeps/mach/strerror_l.c

   1 /* strerror_l - Get errno description string in given locale.  Mach version.
   2    Copyright (C) 2007-2024 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library 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 GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <libintl.h>
  20 #include <locale.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <errno.h>
  25 #include <mach/error.h>
  26 #include <errorlib.h>
  27 #include <tls-internal.h>
  28
  29
  30 static const char *
  31 translate (const char *str, locale_t loc)
  32 {
  33   locale_t oldloc = __uselocale (loc);
  34   const char *res = _(str);
  35   __uselocale (oldloc);
  36   return res;
  37 }
  38
  39
  40 /* Return a string describing the errno code in ERRNUM.  */
  41 char *
  42 __strerror_l (int errnum, locale_t loc)
  43 {
  44   int saved_errno = errno;
  45   char *err;
  46   int system;
  47   int sub;
  48   int code;
  49   const struct error_system *es;
  50   extern void __mach_error_map_compat (int *);
  51
  52   __mach_error_map_compat (&errnum);
  53
  54   system = err_get_system (errnum);
  55   sub = err_get_sub (errnum);
  56   code = err_get_code (errnum);
  57
  58   if (system > err_max_system || ! __mach_error_systems[system].bad_sub)
  59     {
  60       struct tls_internal_t *tls_internal = __glibc_tls_internal ();
  61       free (tls_internal->strerror_l_buf);
  62       if (__asprintf (&tls_internal->strerror_l_buf, "%s%X",
  63                       translate ("Error in unknown error system: ", loc),
  64                       errnum) > 0)
  65         err = tls_internal->strerror_l_buf;
  66       else
  67         {
  68           /* The memory was freed above.  */
  69           tls_internal->strerror_l_buf = NULL;
  70           /* Provide a fallback translation.  */
  71           err = (char *) translate ("Unknown error", loc);
  72         }
  73
  74       __set_errno (saved_errno);
  75       return err;
  76     }
  77
  78   es = &__mach_error_systems[system];
  79
  80   if (sub >= es->max_sub)
  81     err = (char *) translate (es->bad_sub, loc);
  82   else if (code >= es->subsystem[sub].max_code)
  83     {
  84       struct tls_internal_t *tls_internal = __glibc_tls_internal ();
  85       free (tls_internal->strerror_l_buf);
  86       if (__asprintf (&tls_internal->strerror_l_buf, "%s%s %d",
  87                       translate ("Unknown error ", loc),
  88                       translate (es->subsystem[sub].subsys_name, loc),
  89                       errnum) > 0)
  90         err = tls_internal->strerror_l_buf;
  91       else
  92         {
  93           /* The memory was freed above.  */
  94           tls_internal->strerror_l_buf = NULL;
  95           /* Provide a fallback translation.  */
  96           err = (char *) translate ("Unknown error", loc);
  97         }
  98     }
  99   else
 100     err = (char *) translate (es->subsystem[sub].codes[code], loc);
 101
 102   __set_errno (saved_errno);
 103   return err;
 104 }
 105 weak_alias (__strerror_l, strerror_l)
 106 libc_hidden_def (__strerror_l)