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/*
#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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