newlib/libc/string/xpg_strerror_r.c

   1 /* POSIX variant of strerror_r. */
   2 #undef __STRICT_ANSI__
   3 #include <errno.h>
   4 #include <string.h>
   5
   6 int
   7 __xpg_strerror_r (int errnum,
   8         char *buffer,
   9         size_t n)
  10 {
  11   char *error;
  12   int result = 0;
  13
  14   if (!n)
  15     return ERANGE;
  16   error = _strerror_r (_REENT, errnum, 1, &result);
  17   if (strlen (error) >= n)
  18     {
  19       memcpy (buffer, error, n - 1);
  20       buffer[n - 1] = '\0';
  21       return ERANGE;
  22     }
  23   strcpy (buffer, error);
  24   return (result || *error) ? result : EINVAL;
  25 }