Linux管道及有名管道

以实例的方式讲述两者的区别

1. 管道

#include

#include

#include

#include

#include

 

int main()

{

    pid_t childpid

    int fd[2];

    char string[] = "data from child process";

    char tmp[100];

 

    childpid = fork();

    switch(childpid)

    {

         case -1:

            printf("fork error.\n");

            break;

         case 0:

            printf("fork ok, I am the child.\n");

            close(fd[0]);//0->in 1->out 2->stderr

            write(fd[1], string, strlen(string));

            exit(0);

 

        default:

            printf("I am the father.\n");

            close(fd[1]);

            read(fd[0], tmp, sizeof(tmp));

            printf("now buf is %s\n", tmp);

    }

    return 0

}

2. 有名管道

#defined FIFO_TMP "/tmp/fifotest"
 
int main()
{
    int fd;
    char buf[] = "data packet.";
 
    if((mkfifo(FIFO_TMP, S_IRWXU) < 0) && error != EEXIST)
        printf("Error to creat fifo tmp\n");
 
    fd = fopen(FIFO_TMP, "w");
    
    ret = fwite(buf, 1, 100, fd);
}