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)36char *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