external/ibm-public/postfix/dist/src/util/myflock.h

   1 /*      $NetBSD$        */
   2
   3 #ifndef _MYFLOCK_H_INCLUDED_
   4 #define _MYFLOCK_H_INCLUDED_
   5
   6 /*++
   7 /* NAME
   8 /*      myflock 3h
   9 /* SUMMARY
  10 /*      lock open file
  11 /* SYNOPSIS
  12 /*      #include <myflock.h>
  13 /* DESCRIPTION
  14 /* .nf
  15
  16  /*
  17   * External interface.
  18   */
  19 extern int myflock(int, int, int);
  20
  21  /*
  22   * Lock styles.
  23   */
  24 #define MYFLOCK_STYLE_FLOCK     1
  25 #define MYFLOCK_STYLE_FCNTL     2
  26
  27  /*
  28   * Lock request types.
  29   */
  30 #define MYFLOCK_OP_NONE         0
  31 #define MYFLOCK_OP_SHARED       1
  32 #define MYFLOCK_OP_EXCLUSIVE    2
  33 #define MYFLOCK_OP_NOWAIT       4
  34
  35 #define MYFLOCK_OP_BITS \
  36         (MYFLOCK_OP_SHARED | MYFLOCK_OP_EXCLUSIVE | MYFLOCK_OP_NOWAIT)
  37
  38 /* LICENSE
  39 /* .ad
  40 /* .fi
  41 /*      The Secure Mailer license must be distributed with this software.
  42 /* AUTHOR(S)
  43 /*      Wietse Venema
  44 /*      IBM T.J. Watson Research
  45 /*      P.O. Box 704
  46 /*      Yorktown Heights, NY 10598, USA
  47 /*--*/
  48
  49 #endif