Linux_c DUP ()

1 /*2 * stdinredir2.c3 * shows, methods for redirecting , standard input4 * Use #define to set one or the other5  */6#include <stdio.h>7#include <fcntl.h>8 /*#define Close_dup/*open, close, DUP, close*/9 /*#define USE_DUP2/*opne, dup2, close*/Ten intMainvoid) { One   intFD, NEWFD; A   Charline[ -]; -   //Read and Print lines -Fgets (Line, -, stdin); theprintf"Line :%s", line); -    -Fd=open ("/home/wiz/wizcode/psh1.c", o_rdonly);/*Open the disk file*/ -  + #ifdef close_dup -Close0); +Newfd=dup (FD);/*copy open fd to 0*/ A   #else atNewfd=dup2 (FD,0);/*close 0, DUP fd to 0*/ -   #endif -   if(newfd!=0){ -fprintf (stderr,"Could not duplicate fd to 0\n"); -Exit1); -   } in Close (FD); -Fgets (Line, -, stdin); printf"%s", line); toFgets (Line, -, stdin); printf"%s", line); +Fgets (Line, -, stdin); printf"%s", line); -   return 0; the}

Linux_c DUP ()