string/_strerror.c

   1 /* Copyright (C) 1991-2021 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <string.h>
  19 #include <libintl.h>
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22
  23 /* Return a string describing the errno code in ERRNUM.  */
  24 char *
  25 __strerror_r (int errnum, char *buf, size_t buflen)
  26 {
  27   char *err = (char *) __get_errlist (errnum);
  28   if (__glibc_unlikely (err == NULL))
  29     {
  30       __snprintf (buf, buflen, "%s%d", _("Unknown error "), errnum);
  31       return buf;
  32     }
  33
  34   return _(err);
  35 }
  36 weak_alias (__strerror_r, strerror_r)
  37 libc_hidden_def (__strerror_r)