execl.c

关于进程间通信的代码集锦2

#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>

int main()
{
	if(!fork())
	{
		/*****************execl*********************/
	//	pid_t result=execl("/bin/cat","/bin/cat","/etc/passwd","/etc/group",NULL);
	//	pid_t result=execl("/bin/cat","/bin/cat","myfork.c",NULL);		
		/*****************execlp*********************/
		pid_t result=execlp("cat","cat","/etc/passwd","/etc/group","myfork.c",NULL);
		/*****************execv*********************/
	//	char *argv[]={"/bin/cat","/etc/passwd","/etc/group",NULL};
       	//	pid_t result=execv("/bin/cat",argv);
		/*****************execvp********************/
	//	char *argv[]={"cat","/etc/passwd","/etc/group",NULL};
       	//	pid_t result=execvp("cat",argv);
		if(result<0)
		{
			perror("execl error!\n");
		}
	}
	return 0;
}