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fd_copy.c (257B)

      1 /* Public domain. */
      2 
      3 #include <unistd.h>
      4 #include <fcntl.h>
      5 #include "fd.h"
      6 
      7 int fd_copy(int to,int from)
      8 {
      9   if (to == from) return 0;
     10   if (fcntl(from,F_GETFL,0) == -1) return -1;
     11   close(to);
     12   if (fcntl(from,F_DUPFD,to) == -1) return -1;
     13   return 0;
     14 }