sys/sys/wait.h

   1 /*
   2  * Copyright (c) 1982, 1986, 1989, 1993, 1994
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the University nor the names of its contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  *      @(#)wait.h      8.2 (Berkeley) 7/10/94
  30  * $FreeBSD: src/sys/sys/wait.h,v 1.11 1999/12/29 04:24:50 peter Exp $
  31  */
  32
  33 #ifndef _SYS_WAIT_H_
  34 #define _SYS_WAIT_H_
  35
  36 #include <sys/cdefs.h>
  37
  38 /*
  39  * This file holds definitions relevant to the wait4 system call
  40  * and the alternate interfaces that use it (wait, wait3, waitpid).
  41  */
  42
  43 /*
  44  * Macros to test the exit status returned by wait
  45  * and extract the relevant values.
  46  */
  47 #if __BSD_VISIBLE
  48 #define WCOREFLAG       0200
  49 #endif
  50 #define _W_INT(i)       (i)
  51
  52 #define _WSTATUS(x)     (_W_INT(x) & 0177)
  53 #define _WSTOPPED       0177            /* _WSTATUS if process is stopped */
  54 #define WSTOPPED        _WSTOPPED
  55 #define WIFSTOPPED(x)   (_WSTATUS(x) == _WSTOPPED)
  56 #define WSTOPSIG(x)     (_W_INT(x) >> 8)
  57 #define WIFSIGNALED(x)  (_WSTATUS(x) != _WSTOPPED && _WSTATUS(x) != 0)
  58 #define WTERMSIG(x)     (_WSTATUS(x))
  59 #define WIFEXITED(x)    (_WSTATUS(x) == 0)
  60 #define WEXITSTATUS(x)  (_W_INT(x) >> 8)
  61 #define WIFCONTINUED(x) (x == 19)       /* 19 == SIGCONT */
  62 #if __BSD_VISIBLE
  63 #define WCOREDUMP(x)    (_W_INT(x) & WCOREFLAG)
  64
  65 #define W_EXITCODE(ret, sig)    ((ret) << 8 | (sig))
  66 #define W_STOPCODE(sig)         ((sig) << 8 | _WSTOPPED)
  67 #endif
  68
  69 /*
  70  * Option bits for the third argument of wait4.  WNOHANG causes the
  71  * wait to not hang if there are no stopped or terminated processes, rather
  72  * returning an error indication in this case (pid==0).  WUNTRACED
  73  * indicates that the caller should receive status about untraced children
  74  * which stop due to signals.  If children are stopped and a wait without
  75  * this option is done, it is as though they were still running... nothing
  76  * about them is returned.
  77  */
  78 #define WNOHANG         1       /* don't hang in wait */
  79 #define WUNTRACED       2       /* tell about stopped, untraced children */
  80 #define WCONTINUED      4       /* Report a job control continued process. */
  81 #if __BSD_VISIBLE
  82 #define WLINUXCLONE     0x80000000 /* wait for kthread spawned from linux_clone */
  83
  84 /*
  85  * Tokens for special values of the "pid" parameter to wait4.
  86  */
  87 #define WAIT_ANY        (-1)    /* any process */
  88 #define WAIT_MYPGRP     0       /* any process in my process group */
  89 #endif /* __BSD_VISIBLE */
  90
  91 #if !defined(_KERNEL) || defined(_KERNEL_VIRTUAL)
  92 #ifndef _SYS_TYPES_H_
  93 #include <sys/types.h>
  94 #endif
  95
  96 __BEGIN_DECLS
  97 pid_t   wait(int *);
  98 pid_t   waitpid(pid_t, int *, int);
  99 #if __XSI_VISIBLE < 600 || __BSD_VISIBLE
 100 struct rusage;
 101 pid_t   wait3(int *, int, struct rusage *);
 102 #endif
 103 #if __BSD_VISIBLE
 104 pid_t   wait4(pid_t, int *, int, struct rusage *);
 105 #endif
 106 __END_DECLS
 107 #endif
 108
 109 #endif