/*
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <limits.h>
#define BUFSIZE PIPE_BUF
int main(int argc, char *argv[])
{
int fd[2];
int len;
pid_t pid;
char buffer[BUFSIZ]="hello,Linux world!\n";
//create pipe if(pipe(fd)<0) { printf("pipe failed!\n"); exit(1); } //create son process if((pid=fork())<0) { printf("fork failed!\n"); exit(1); } else if(pid>0)// father process { close(fd[0]); write(fd[0],buf,strlen(buf));//father process write data to pipe exit(0); } else { close(fd[1]);//son process close the write of pipe len=read(fd[0],buf,BUFSIZE);//son process read data from pipe if(len<0) { printf("process failed when read a pipe.\n"); exit(1); } else write(STDOUT_FILENO,buf,len);//output to stdout exit(0); } //return 0; }
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