EXIT_SUCCESS

Standard C library (libc)

EXIT_SUCCESS and EXIT_FAILURE represent a successful and unsuccessful exit status respectively, and can be used as arguments to the exit(3) function.

C11, POSIX.1-2008.

C89, POSIX.1-2001.

#include <stdio.h>
#include <stdlib.h>
int
main(int argc, char *argv[])
{


    FILE *fp;


    if (argc != 2) {


        fprintf(stderr, "Usage: %s <file>\n", argv[0]);


        exit(EXIT_FAILURE);


    }


    fp = fopen(argv[1], "r");


    if (fp == NULL) {


        perror(argv[1]);


        exit(EXIT_FAILURE);


    }


    /* Other code omitted */


    fclose(fp);


    exit(EXIT_SUCCESS);
}