pwrite.c

Unix编程例子

#include <stdio.h>
int main(void)
{
	int pfd[2];
	char fdstr[16], *message = "Send/Receive data using pipe\n";
	pipe(pfd);
	if(fork() == 0){ /* child */
		close(pfd[1]);
		sprintf(fdstr, "%d", pfd[0]);
		execlp("./pread", "pread", fdstr, 0);
		perror ("Execute 'pread'");
	}else{ /* parent */
		close(pfd[0]);
		write(pfd[1], message, strlen(message));
		write(pfd[1], message, strlen(message));
		close(pfd[1]);
	}
}