sysdeps/mach/strerror_l.c

   1 /* strerror_l - Get errno description string in given locale.  Mach version.
   2    Copyright (C) 2007-2018 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    <http://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 <mach/error.h>
  25 #include <errorlib.h>
  26 #include <sys/param.h>
  27
  28
  29 static __thread char *last_value;
  30
  31
  32 static const char *
  33 translate (const char *str, locale_t loc)
  34 {
  35   locale_t oldloc = __uselocale (loc);
  36   const char *res = _(str);
  37   __uselocale (oldloc);
  38   return res;
  39 }
  40
  41
  42 /* Return a string describing the errno code in ERRNUM.  */
  43 char *
  44 strerror_l (int errnum, locale_t loc)
  45 {
  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       free (last_value);
  61       if (__asprintf (&last_value, "%s%X",
  62                       translate ("Error in unknown error system: ", loc),
  63                       errnum) == -1)
  64         last_value = NULL;
  65
  66       return last_value;
  67     }
  68
  69   es = &__mach_error_systems[system];
  70
  71   if (sub >= es->max_sub)
  72     return (char *) translate (es->bad_sub, loc);
  73
  74   if (code >= es->subsystem[sub].max_code)
  75     {
  76       free (last_value);
  77       if (__asprintf (&last_value, "%s%s %d",
  78                       translate ("Unknown error ", loc),
  79                       translate (es->subsystem[sub].subsys_name, loc),
  80                       errnum) == -1)
  81         last_value = NULL;
  82
  83       return last_value;
  84     }
  85
  86   return (char *) translate (es->subsystem[sub].codes[code], loc);
  87 }
  88
  89
  90 #ifdef _LIBC
  91 # ifdef _LIBC_REENTRANT
  92 /* This is called when a thread is exiting to free the last_value string.  */
  93 static void __attribute__ ((section ("__libc_thread_freeres_fn")))
  94 strerror_thread_freeres (void)
  95 {
  96   free (last_value);
  97 }
  98 text_set_element (__libc_thread_subfreeres, strerror_thread_freeres);
  99 text_set_element (__libc_subfreeres, strerror_thread_freeres);
 100 # endif
 101 #endif