skalibs

Mirror/fork of https://skarnet.org/software/skalibs/
git clone https://ccx.te2000.cz/git/skalibs
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fd_copy.c (267B)

      1 /* ISC license. */
      2 
      3 #include <unistd.h>
      4 #include <errno.h>
      5 #include <skalibs/djbunix.h>
      6 
      7 int fd_copy (int to, int from)
      8 {
      9   int r ;
     10   if (to == from) return (errno = EINVAL, -1) ;
     11   do
     12     r = dup2(from, to) ;
     13   while ((r == -1) && (errno == EINTR)) ;
     14   return r ;
     15 }