system.c

基于网络编程的例子

/*
 * system.c - Demonstrate the system() call
 */
#include <stdio.h>
#include <stdlib.h>

int main(void)
{
	int retval;

	retval = system("ls -l");

	if(retval == 127) {
		fprintf(stderr, "/bin/sh not available\n");
		exit(127);
	} else if(retval == -1) {
		perror("system");
		exit(EXIT_FAILURE);
	} else if(retval != 0) {
		fprintf(stderr, "command returned %d\n", retval);
		perror("ls");
	} else {
		puts("command successfully executed");
	}
	exit(EXIT_SUCCESS);
}