1 /* Copyright (c) 2011 Eric Blake <eblake@redhat.com> */
2 /* POSIX variant of strerror_r. */
3 #define _POSIX_C_SOURCE 200809
4 #include <errno.h>
5 #include <string.h>
6 #include "local.h"
7
8 int
9 __xpg_strerror_r (int errnum,
10 char *buffer,
11 size_t n);
12
13 int
__xpg_strerror_r(int errnum,char * buffer,size_t n)14 __xpg_strerror_r (int errnum,
15 char *buffer,
16 size_t n)
17 {
18 char *error;
19 int result = 0;
20
21 if (!n)
22 return ERANGE;
23 error = _strerror_r (errnum, 1, &result);
24 if (strlen (error) >= n)
25 {
26 memcpy (buffer, error, n - 1);
27 buffer[n - 1] = '\0';
28 return ERANGE;
29 }
30 strcpy (buffer, error);
31 return (result || *error) ? result : EINVAL;
32 }
33
