winsup/cygwin/include/cygwin/wait.h

   1 /* cygwin/wait.h
   2
   3    Copyright 2006, 2009, 2011, 2012 Red Hat, Inc.
   4
   5 This file is part of Cygwin.
   6
   7 This software is a copyrighted work licensed under the terms of the
   8 Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
   9 details. */
  10
  11 #ifndef _CYGWIN_WAIT_H
  12 #define _CYGWIN_WAIT_H
  13
  14 #define WAIT_ANY        (pid_t)-1
  15 #define WAIT_MYPGRP     (pid_t)0
  16
  17 #define WNOHANG 1
  18 #define WUNTRACED 2
  19 #define WCONTINUED 8
  20 #define __W_CONTINUED   0xffff
  21
  22 /* Will be redefined in sys/wait.h.  */
  23 #define __wait_status_to_int(w)  (w)
  24
  25 /* A status is 16 bits, and looks like:
  26       <1 byte info> <1 byte code>
  27
  28       <code> == 0, child has exited, info is the exit value
  29       <code> == 1..7e, child has exited, info is the signal number.
  30       <code> == 7f, child has stopped, info was the signal number.
  31       <code> == 80, there was a core dump.
  32 */
  33
  34 #define WIFEXITED(w)    ((__wait_status_to_int(w) & 0xff) == 0)
  35 #define WIFSIGNALED(w)  ((__wait_status_to_int(w) & 0x7f) > 0 \
  36                          && ((__wait_status_to_int(w) & 0x7f) < 0x7f))
  37 #define WIFSTOPPED(w)   ((__wait_status_to_int(w) & 0xff) == 0x7f)
  38 #define WIFCONTINUED(w) ((__wait_status_to_int(w) & 0xffff) == __W_CONTINUED)
  39 #define WEXITSTATUS(w)  ((__wait_status_to_int(w) >> 8) & 0xff)
  40 #define WTERMSIG(w)     (__wait_status_to_int(w) & 0x7f)
  41 #define WSTOPSIG        WEXITSTATUS
  42 #define WCOREDUMP(w)    (WIFSIGNALED(w) && (__wait_status_to_int(w) & 0x80))
  43
  44 #endif /* _CYGWIN_WAIT_H */