1 /* Copyright (C) 1989-2018 Free Software Foundation, Inc.
2      Written by James Clark (jjc@jclark.com)
3 
4 This file is part of groff.
5 
6 groff is free software; you can redistribute it and/or modify it under
7 the terms of the GNU General Public License as published by the Free
8 Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
10 
11 groff is distributed in the hope that it will be useful, but WITHOUT ANY
12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14 for more details.
15 
16 You should have received a copy of the GNU General Public License
17 along with this program.  If not, see <http://www.gnu.org/licenses/>. */
18 
19 #ifdef HAVE_CONFIG_H
20 #include <config.h>
21 #endif
22 
23 #include <stdio.h>
24 #include <errno.h>
25 #include <stdlib.h>		/* for MinGW */
26 
27 #define INT_DIGITS 19		/* enough for 64 bit integer */
28 
29 #ifndef HAVE_SYS_NERR
30 extern int sys_nerr;
31 #endif
32 #ifndef HAVE_SYS_ERRLIST
33 extern char *sys_errlist[];
34 #endif
35 
strerror(n)36 char *strerror(n)
37      int n;
38 {
39   static char buf[sizeof("Error ") + 1 + INT_DIGITS];
40   if (n >= 0 && n < sys_nerr && sys_errlist[n] != 0)
41     return sys_errlist[n];
42   else {
43     sprintf(buf, "Error %d", n);
44     return buf;
45   }
46 }
47