通过管道实现进程间通信
int pipe(int filedes[2]);
//成功时返回0, 失败时返回-1。
实例代码:
int main(int argc , char *argv[])
{
int fds[2];
char str[]="Who are you?";
char buf[BUF_SIZE];
pid_t pid;
pipe(fds);
pid=fork() ;
if(pid==0)
{
write(fds[l], str, sizeof(str)) ;
}
else
{
read(fds[0], buf, BUF_SIZE);
puts(buf);
}
return 0;
}
通过管道进行进程间双向通信
实例代码:
int main(int argc , char *argv[])
{
int fds1[2], fds2[2];
char str1[]="Who are you?";
char str2[]="Thank you for your message";
char buf[BUF_SIZE];
pid_t pid;
pipe(fds1);
pipe(fds2);
pid=fork() ;
if(pid==0)
{
write(fds1[1], str, sizeof(str));
read(fds2[0], buf, BUF_SIZE);
printf("Child proc output: %s \n", buf);
}
else
{
read(fds1[0], buf, BUF_SIZE);
printf("Parent pr oc output: %s \n", buf);
write(fds2[1], str2, sizeof(str2));
sleep(3);
}
return 0;
}