FreeNOS
strerror.cpp
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1 /*
2  * Copyright (C) 2009 Niek Linnenbank
3  *
4  * This program is free software: you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License as published by
6  * the Free Software Foundation, either version 3 of the License, or
7  * (at your option) any later version.
8  *
9  * This program 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
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with this program. If not, see <http://www.gnu.org/licenses/>.
16  */
17 
18 #include "string.h"
19 
20 char * strerror(int errnum)
21 {
22  return error_map[-errnum % -ELAST];
23 }
string.h
ELAST
#define ELAST
Last defined error value (do not use).
Definition: errno.h:292
error_map
C char * error_map[]
Contains a array of character strings, representing errno values.
Definition: errno.c:23
strerror
char * strerror(int errnum)
The strerror function maps the number in errnum to a message string.
Definition: strerror.cpp:20