chickenshell/run.c

#include "run.h"
#include <sys/wait.h>

struct Job {
    bool done;
    int ret_val;
    char **argv;
    int argc;
};

/* Fork and exec a command given in args taking input from in and sending 
 * output to out. The arguments array must end in a NULL. 
 *
 * Returns true on success or 1 on failure.
 */
int execute(int in_FD, int out_FD, char *args[], pid_t* child_ID) {

    int err = fork();

    if (err == -1) {
        return ER_FAIL_TO_FORK;
    }

    if (err) {  // parent
        *child_ID = err;
        return ER_SUCCESS;
    } else {    // child
        dup2(in_FD, 0);
        dup2(out_FD, 1);

        err = execvp(args[0], args);
        if (err) {
            perror("Bad");
        }
    }

    return ER_SUCCESS;
}