ppipe.c

操作系统中进程通信的说明性实验程序

#include<stdio.h>
#include<unistd.h>
#include<stdlib.h>
int main(int argc,char *argv[])
{
int pid;
int pipe1[2];
int pipe2[2];
int x;
if(pipe(pipe1)<0)
{
perror("pipe not create");
exit(EXIT_FAILURE);
}
if(pipe(pipe2)<0)
{
perror("pipe not create");
exit(EXIT_FAILURE);
}
if((pid=fork())<0)
{
perror("pipe not create");
exit(EXIT_FAILURE);
}
else if(pid==0)
{
close(pipe1[1]);
close(pipe2[0]);
do
{
read(pipe1[0],&x,sizeof(int));
printf("child%dread:%d\n",getpid(),x++);
write(pipe2[1],&x,sizeof(int));
}while(x<=9);
close(pipe1[0]);
close(pipe2[1]);
exit(EXIT_SUCCESS);
}
else
{
close(pipe1[0]);
close(pipe2[1]);
x=1;
do
{
write(pipe2[1],&x,sizeof(int));
read(pipe1[0],&x,sizeof(int));
printf("parent%dread:%d\n",getpid(),x++);
}while(x<=9);
close(pipe1[1]);
close(pipe2[0]);
}
return EXIT_SUCCESS;
}