Question

How to get the program exit status code in C

Answer 1

#include <stdio.h>
#include <unistd.h>
#include <sys/wait.h>

int main() {
    int id = fork();
    
    if (id == -1) {
        return 1;
    }

    if (id == 0) {
        int err = -1;
        if (err == -1) {
            printf("Error...\n");
            return 3;
        }
    } else {
        int status;
        
        wait(&status);
        
        if (WIFEXITED(status)) {
            int exitCode = WEXITSTATUS(status);
            if (exitCode == 0) {
                printf("Success\n");
            } else {
                printf("Failure with status code: %d\n", exitCode);
            }
        }
    }

    return 0;
}




/*
run:

Error...
Failure with status code: 3

*/

 

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