Simple Linux Pipe Example | Pipe Command Linux (dup2)

Simple Linux Pipe Example | Pipe Command Linux (dup2)

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#include <stdio.h>

#include <stdlib.h>

#include<string.h>

#include <unistd.h>

int main(void)

{

   int pfds[2];

   pipe(pfds);

  

   pid_t pid;

   pid=fork();

   if (pid==0) {

        close(1);          /* close normal stdout */

        dup2(pfds[1],1);   /* make stdout same as pfds[1] */

        close(pfds[0]);    /* we don't need this */

        execlp("ls", "ls", NULL);

   }

   else {

        close(0);          /* close normal stdin */

        dup2(pfds[0],0);   /* make stdin same as pfds[0] */

        close(pfds[1]);    /* we don't need this */

        execlp("more", "more", NULL, NULL);

    }

    return 0;

}