sysdeps/mach/strerror_l.c

   1 /* strerror_l - Get errno description string in given locale.  Mach version.
   2    Copyright (C) 2007, 2008 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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <libintl.h>
  21 #include <locale.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <mach/error.h>
  26 #include <errorlib.h>
  27 #include <sys/param.h>
  28
  29
  30 static __thread char *last_value;
  31
  32
  33 static const char *
  34 translate (const char *str, locale_t loc)
  35 {
  36   locale_t oldloc = __uselocale (loc);
  37   const char *res = _(str);
  38   __uselocale (oldloc);
  39   return res;
  40 }
  41
  42
  43 /* Return a string describing the errno code in ERRNUM.  */
  44 char *
  45 strerror_l (int errnum, locale_t loc)
  46 {
  47   int system;
  48   int sub;
  49   int code;
  50   const struct error_system *es;
  51   extern void __mach_error_map_compat (int *);
  52
  53   __mach_error_map_compat (&errnum);
  54
  55   system = err_get_system (errnum);
  56   sub = err_get_sub (errnum);
  57   code = err_get_code (errnum);
  58
  59   if (system > err_max_system || ! __mach_error_systems[system].bad_sub)
  60     {
  61       free (last_value);
  62       if (__asprintf (&last_value, "%s%X",
  63                       translate ("Error in unknown error system: ", loc),
  64                       errnum) == -1)
  65         last_value = NULL;
  66
  67       return last_value;
  68     }
  69
  70   es = &__mach_error_systems[system];
  71
  72   if (sub >= es->max_sub)
  73     return (char *) translate (es->bad_sub, loc);
  74
  75   if (code >= es->subsystem[sub].max_code)
  76     {
  77       free (last_value);
  78       if (__asprintf (&last_value, "%s%s %d",
  79                       translate ("Unknown error ", loc),
  80                       translate (es->subsystem[sub].subsys_name, loc),
  81                       errnum) == -1)
  82         last_value = NULL;
  83
  84       return last_value;
  85     }
  86
  87   return (char *) translate (es->subsystem[sub].codes[code], loc);
  88 }
  89
  90
  91 #ifdef _LIBC
  92 # ifdef _LIBC_REENTRANT
  93 /* This is called when a thread is exiting to free the last_value string.  */
  94 static void __attribute__ ((section ("__libc_thread_freeres_fn")))
  95 strerror_thread_freeres (void)
  96 {
  97   free (last_value);
  98 }
  99 text_set_element (__libc_thread_subfreeres, strerror_thread_freeres);
 100 text_set_element (__libc_subfreeres, strerror_thread_freeres);
 101 # endif
 102 #endif