Question

C programming in Shell

Implement a MS-DOS style pipe command. Make sure it allows for command-line arguments to be passed to the programs. You only need to support one pipe command at a time. For example, when you type ls | wc the shell should

• write the output of ls to a temporary file by redirecting standard output when running ls, and
• run wc, redirecting standard input so it reads from the temporary file written to by ls.

Answer 1

Here is the C code for you:

#include <stdio.h>
#include <unistd.h>
#include <dirent.h>
#include <stdlib.h>

int main (void) {

   char command[20];
   printf("Enter your command: ");
   fgets(command, 80, stdin);   /* Read a command as input from keyboard */
   system(command);       /* Execute the command */

}

And the sample output screenshot is:

This code works for any shell commands you execute directly in terminal.