external/ibm-public/postfix/dist/src/util/duplex_pipe.c

   1 /*      $NetBSD$        */
   2
   3 /*++
   4 /* NAME
   5 /*      duplex_pipe 3
   6 /* SUMMARY
   7 /*      local IPD
   8 /* SYNOPSIS
   9 /*      #include <iostuff.h>
  10 /*
  11 /*      int     duplex_pipe(fds)
  12 /*      int     *fds;
  13 /* DESCRIPTION
  14 /*      duplex_pipe() uses whatever local primitive it takes
  15 /*      to get a two-way I/O channel.
  16 /* DIAGNOSTICS
  17 /*      A null result means success. In case of error, the result
  18 /*      is -1 and errno is set to the appropriate number.
  19 /* LICENSE
  20 /* .ad
  21 /* .fi
  22 /*      The Secure Mailer license must be distributed with this software.
  23 /* AUTHOR(S)
  24 /*      Wietse Venema
  25 /*      IBM T.J. Watson Research
  26 /*      P.O. Box 704
  27 /*      Yorktown Heights, NY 10598, USA
  28 /*--*/
  29
  30 /* System libraries */
  31
  32 #include <sys_defs.h>
  33 #include <sys/socket.h>
  34 #include <unistd.h>
  35
  36 /* Utility library. */
  37
  38 #include "iostuff.h"
  39 #include "sane_socketpair.h"
  40
  41 /* duplex_pipe - give me a duplex pipe or bust */
  42
  43 int     duplex_pipe(int *fds)
  44 {
  45 #ifdef HAS_DUPLEX_PIPE
  46     return (pipe(fds));
  47 #else
  48     return (sane_socketpair(AF_UNIX, SOCK_STREAM, 0, fds));
  49 #endif
  50 }
  51