8.10.c

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

char *env_init[] = {"USER=unknown", "PATH=/tmp", NULL};

int main() {
    pid_t pid;

    if ((pid = fork()) < 0) {
        err_sys("fork error");
    } else if (pid == 0) {
        if (execle("/home/meik/apue/Chapter-08/echoall", "echoall", "myarg1", "MY ARG2", (char *)0, env_init) < 0) {
            err_sys("execle error");
        }
    }

    if (waitpid(pid, NULL, 0) < 0) {
        err_sys("wait error");
    }

    if ((pid = fork()) < 0) {
        err_sys("fork error");
    } else if (pid == 0) {
        if (execlp("./echoall", "echoall", "only 1 arg", (char *)0) < 0) {
            err_sys("execlp error");
        }
    }
    exit(0);
}