external/ibm-public/postfix/dist/src/global/timed_ipc.c

   1 /*      $NetBSD$        */
   2
   3 /*++
   4 /* NAME
   5 /*      timed_ipc 3
   6 /* SUMMARY
   7 /*      enforce IPC timeout on stream
   8 /* SYNOPSIS
   9 /*      #include <time_ipc.h>
  10 /*
  11 /*      void    timed_ipc_setup(stream)
  12 /*      VSTREAM *stream;
  13 /* DESCRIPTION
  14 /*      timed_ipc() enforces on the specified stream the timeout as
  15 /*      specified via the \fIipc_timeout\fR configuration parameter:
  16 /*      a read or write operation fails if it does not succeed within
  17 /*      \fIipc_timeout\fR seconds. This deadline exists as a safety
  18 /*      measure for communication between mail subsystem programs,
  19 /*      and should never be exceeded.
  20 /* DIAGNOSTICS
  21 /*      Panic: sanity check failed. Fatal error: deadline exceeded.
  22 /* LICENSE
  23 /* .ad
  24 /* .fi
  25 /*      The Secure Mailer license must be distributed with this software.
  26 /* AUTHOR(S)
  27 /*      Wietse Venema
  28 /*      IBM T.J. Watson Research
  29 /*      P.O. Box 704
  30 /*      Yorktown Heights, NY 10598, USA
  31 /*--*/
  32
  33 /* System library. */
  34
  35 #include <sys_defs.h>
  36
  37 /* Utility library. */
  38
  39 #include <msg.h>
  40 #include <vstream.h>
  41
  42 /* Global library. */
  43
  44 #include "mail_params.h"
  45 #include "timed_ipc.h"
  46
  47 /* timed_ipc_setup - enable ipc with timeout */
  48
  49 void    timed_ipc_setup(VSTREAM *stream)
  50 {
  51     if (var_ipc_timeout <= 0)
  52         msg_panic("timed_ipc_setup: bad ipc_timeout %d", var_ipc_timeout);
  53
  54     vstream_control(stream,
  55                     VSTREAM_CTL_TIMEOUT, var_ipc_timeout,
  56                     VSTREAM_CTL_END);
  57 }