include/sys/wait.h

   1 /* sys/wait.h
   2
   3    Copyright 1997, 1998, 2001 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 _SYS_WAIT_H
  12 #define _SYS_WAIT_H
  13
  14 #include <sys/types.h>
  15 #include <sys/resource.h>
  16
  17 #ifdef __cplusplus
  18 extern "C" {
  19 #endif
  20
  21 #define WNOHANG 1
  22 #define WUNTRACED 2
  23
  24 /* A status looks like:
  25       <2 bytes info> <2 bytes code>
  26
  27       <code> == 0, child has exited, info is the exit value
  28       <code> == 1..7e, child has exited, info is the signal number.
  29       <code> == 7f, child has stopped, info was the signal number.
  30       <code> == 80, there was a core dump.
  31 */
  32
  33 #define WIFEXITED(w)    (((w) & 0xff) == 0)
  34 #define WIFSIGNALED(w)  (((w) & 0x7f) > 0 && (((w) & 0x7f) < 0x7f))
  35 #define WIFSTOPPED(w)   (((w) & 0xff) == 0x7f)
  36 #define WEXITSTATUS(w)  (((w) >> 8) & 0xff)
  37 #define WTERMSIG(w)     ((w) & 0x7f)
  38 #define WSTOPSIG        WEXITSTATUS
  39
  40 pid_t wait (int *);
  41 pid_t waitpid (pid_t, int *, int);
  42 pid_t wait3 (int *__status, int __options, struct rusage *__rusage);
  43 pid_t wait4 (pid_t __pid, int *__status, int __options, struct rusage *__rusage);
  44
  45 union wait
  46   {
  47     int w_status;
  48     struct
  49       {
  50         unsigned int __w_termsig:7; /* Terminating signal.  */
  51         unsigned int __w_coredump:1; /* Set if dumped core.  */
  52         unsigned int __w_retcode:8; /* Return code if exited normally.  */
  53         unsigned int:16;
  54       } __wait_terminated;
  55     struct
  56       {
  57         unsigned int __w_stopval:8; /* W_STOPPED if stopped.  */
  58         unsigned int __w_stopsig:8; /* Stopping signal.  */
  59         unsigned int:16;
  60       } __wait_stopped;
  61   };
  62
  63 #define w_termsig       __wait_terminated.__w_termsig
  64 #define w_coredump      __wait_terminated.__w_coredump
  65 #define w_retcode       __wait_terminated.__w_retcode
  66 #define w_stopsig       __wait_stopped.__w_stopsig
  67 #define w_stopval       __wait_stopped.__w_stopval
  68
  69 #ifdef __cplusplus
  70 };
  71 #endif
  72
  73 #endif