/*-------------------------------------------------------------------*/
/* testdupstdin.c                                                    */
/* The dup system call to redirect stdin.                            */
/*-------------------------------------------------------------------*/

#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>

int main(int argc, char *argv[])
{
   int iFd;
   char pcBuffer[1024];

   scanf("%s", pcBuffer);
   printf("%s\n", pcBuffer);

   iFd = open("tempfile", O_RDONLY, 0);
   close(0);
   dup(iFd);
   close(iFd);

   scanf("%s", pcBuffer);
   printf("%s\n", pcBuffer);

   return 0;
}

/* Sample executions:

$ cat tempfile
somedata
$ testdupstdin
somedata           <- Typed by the user.
somedata
somedata
$ 

*/