FreeBSD/Linux Kernel Cross Reference
sys/sys/wait.h

     /*      $OpenBSD: wait.h,v 1.20 2022/12/19 00:22:11 guenther Exp $      */
     /*      $NetBSD: wait.h,v 1.11 1996/04/09 20:55:51 cgd Exp $    */
     
     /*
      * Copyright (c) 1982, 1986, 1989, 1993, 1994
      *      The Regents of the University of California.  All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      @(#)wait.h      8.2 (Berkeley) 7/10/94
     */
    
    #ifndef _SYS_WAIT_H_
    #define _SYS_WAIT_H_
    
    #include <sys/cdefs.h>
    #include <sys/siginfo.h>
    
    /*
     * This file holds definitions relevant to the wait4 system call
     * and the alternate interfaces that use it (wait, wait3, waitpid).
     */
    
    /*
     * Macros to test the exit status returned by wait
     * and extract the relevant values.
     */
    #define _WSTATUS(x)     ((x) & 0177)
    #define _WSTOPPED       0177            /* _WSTATUS if process is stopped */
    #define _WCONTINUED     0177777         /* process has continued */
    #define WIFSTOPPED(x)   (((x) & 0xff) == _WSTOPPED)
    #define WSTOPSIG(x)     (int)(((unsigned)(x) >> 8) & 0xff)
    #define WIFSIGNALED(x)  (_WSTATUS(x) != _WSTOPPED && _WSTATUS(x) != 0)
    #define WTERMSIG(x)     (_WSTATUS(x))
    #define WIFEXITED(x)    (_WSTATUS(x) == 0)
    #define WEXITSTATUS(x)  (int)(((unsigned)(x) >> 8) & 0xff)
    #define WIFCONTINUED(x) (((x) & _WCONTINUED) == _WCONTINUED)
    #if __XPG_VISIBLE
    #define WCOREFLAG       0200
    #define WCOREDUMP(x)    ((x) & WCOREFLAG)
    
    #define W_EXITCODE(ret, sig)    ((ret) << 8 | (sig))
    #define W_STOPCODE(sig)         ((sig) << 8 | _WSTOPPED)
    #endif
    
    /*
     * Option bits for the third argument of wait4.  WNOHANG causes the
     * wait to not hang if there are no stopped or terminated processes, rather
     * returning an error indication in this case (pid==0).  WUNTRACED
     * indicates that the caller should receive status about untraced children
     * which stop due to signals.  If children are stopped and a wait without
     * this option is done, it is as though they were still running... nothing
     * about them is returned. WNOWAIT only requests information about zombie,
     * leaving the proc around, available for later waits.
     */
    #define WNOHANG         0x01    /* don't hang in wait */
    #define WUNTRACED       0x02    /* report stopped-by-signal processes */
    #define WCONTINUED      0x08    /* report job control continued processes */
    #if __POSIX_VISIBLE >= 200809 || __XPG_VISIBLE >= 420
    #define WEXITED         0x04    /* report exited processes */
    #define WSTOPPED        WUNTRACED
    #define WNOWAIT         0x10    /* poll only */
    #define WTRAPPED        0x20    /* report stopped-by-tracing processes */
    
    typedef enum {
            P_ALL,
            P_PGID,
            P_PID
    } idtype_t;
    #endif
    
    #if __BSD_VISIBLE
    /*
     * Tokens for special values of the "pid" parameter to wait4.
     */
    #define WAIT_ANY        (-1)    /* any process */
    #define WAIT_MYPGRP     0       /* any process in my process group */
   #endif /* __BSD_VISIBLE */
   
   #ifndef _KERNEL
   #include <sys/types.h>
   
   __BEGIN_DECLS
   struct rusage;  /* forward declaration */
   
   pid_t   wait(int *);
   pid_t   waitpid(pid_t, int *, int);
   #if __POSIX_VISIBLE >= 200809 || __XPG_VISIBLE >= 420
   int     waitid(idtype_t, id_t, siginfo_t *, int);
   #endif
   #if __BSD_VISIBLE
   pid_t   wait3(int *, int, struct rusage *);
   pid_t   wait4(pid_t, int *, int, struct rusage *);
   #endif /* __BSD_VISIBLE */
   __END_DECLS
   #endif /* !_KERNEL */
   
   #endif /* !_SYS_WAIT_H_ */

Cache object: de4596576159888b5781509cfac5bdf2