minimake/microshell/microshell.c

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

int main(int argc, char **argv)
{
    if (argc < 2)
        err(1, "Not enough args");

    int id = fork();
    if (id < 0)
        err(1, "Cannot fork");

    if (id == 0)
    {
        int res = 0;
        wait(&res);
        // printf("%d\n", res);
        return res;
    }
    else
    {
        int res = execl("/bin/sh", "supershell", "-c", argv[1], NULL);
        printf("process exit status: %d\n", res);
        // exit(res);
        return res;
    }
}