strerror()

Convert an error number to an error message

Synopsis:

#include <string.h>

char* strerror( int errnum );

Library:

libc

Description:

The strerror() function maps the error number contained in errnum to an error message. This function works for any valid errno value.

Returns:

A pointer to the error message. Don't modify the string it points to.

Examples:

#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <stdlib.h>

int main( void )
{
    FILE *fp;

    fp = fopen( "file.name", "r" );
    if( fp == NULL ) {
        printf( "Unable to open file: %s\n",
            strerror( errno ) );
    }

    return EXIT_SUCCESS;
}

Classification:

ANSI

See also:

errno, perror()