lib/dup2.c

   1 /*
   2  * dup2.c
   3  *
   4  * Ersatz dup2() for really ancient systems
   5  */
   6
   7 #include "config.h"
   8
   9 int dup2(int oldfd, int newfd)
  10 {
  11     int rv, nfd;
  12
  13     close(newfd);
  14
  15     nfd = rv = dup(oldfd);
  16
  17     if (rv >= 0 && rv != newfd) {
  18         rv = dup2(oldfd, newfd);
  19         close(nfd);
  20     }
  21
  22     return rv;
  23 }