dev/c/src/fork/fork_exec.c


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#include <sys/types.h>
#include <sys/wait.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <string.h>

int main(){ 

	pid_t cpid,ppid;
	char errbuf[1024];

	char *prog = "vim";
	char *const args[3]= {"vim", "fork_exec.c", NULL};

	cpid = fork();
	if (cpid == -1) {
		(void) snprintf(errbuf, sizeof(errbuf),
				"fork: %s", strerror(errno));
		printf("%s\n", errbuf);
		exit(1);
	}

	if (cpid == 0) {	
		//child
		ppid = getppid();
		if(ppid == 1){
			printf("parent died ?\n");
			_exit(1);
		}
		execvp(prog, args);
		_exit(0);
	}
/* parent */
	wait(NULL);
	printf("Child id: %i\n", cpid);
	return 0;
}