The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

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

Version: -  FREEBSD  -  FREEBSD-13-STABLE  -  FREEBSD-13-0  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  l41  -  OPENBSD  -  linux-2.6  -  MK84  -  PLAN9  -  xnu-8792 
SearchContext: -  none  -  3  -  10 

    1 /*      $NetBSD: wait.h,v 1.21 2003/09/20 14:59:56 cl Exp $     */
    2 
    3 /*
    4  * Copyright (c) 1982, 1986, 1989, 1993, 1994
    5  *      The Regents of the University of California.  All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. Neither the name of the University nor the names of its contributors
   16  *    may be used to endorse or promote products derived from this software
   17  *    without specific prior written permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  *
   31  *      @(#)wait.h      8.2 (Berkeley) 7/10/94
   32  */
   33 
   34 #ifndef _SYS_WAIT_H_
   35 #define _SYS_WAIT_H_
   36 
   37 #include <sys/featuretest.h>
   38 
   39 /*
   40  * This file holds definitions relevent to the wait4 system call
   41  * and the alternate interfaces that use it (wait, wait3, waitpid).
   42  */
   43 
   44 /*
   45  * Macros to test the exit status returned by wait
   46  * and extract the relevant values.
   47  */
   48 #if !( defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE) ) || defined(_KERNEL)
   49 #define _W_INT(i)       (i)
   50 #else
   51 #define _W_INT(w)       (*(int *)(void *)&(w))  /* convert union wait to int */
   52 #endif
   53 
   54 #define _WSTATUS(x)     (_W_INT(x) & 0177)
   55 #define _WSTOPPED       0177            /* _WSTATUS if process is stopped */
   56 #define WIFSTOPPED(x)   (_WSTATUS(x) == _WSTOPPED)
   57 #define WSTOPSIG(x)     ((int)(((unsigned int)_W_INT(x)) >> 8) & 0xff)
   58 #define WIFSIGNALED(x)  (_WSTATUS(x) != _WSTOPPED && _WSTATUS(x) != 0)
   59 #define WTERMSIG(x)     (_WSTATUS(x))
   60 #define WIFEXITED(x)    (_WSTATUS(x) == 0)
   61 #define WEXITSTATUS(x)  ((int)(((unsigned int)_W_INT(x)) >> 8) & 0xff)
   62 #if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE) || defined(_KERNEL)
   63 #define WCOREFLAG       0200
   64 #define WCOREDUMP(x)    (_W_INT(x) & WCOREFLAG)
   65 
   66 #define W_EXITCODE(ret, sig)    ((ret) << 8 | (sig))
   67 #define W_STOPCODE(sig)         ((sig) << 8 | _WSTOPPED)
   68 #endif
   69 
   70 /*
   71  * Option bits for the third argument of wait4.  WNOHANG causes the
   72  * wait to not hang if there are no stopped or terminated processes, rather
   73  * returning an error indication in this case (pid==0).  WUNTRACED
   74  * indicates that the caller should receive status about untraced children
   75  * which stop due to signals.  If children are stopped and a wait without
   76  * this option is done, it is as though they were still running... nothing
   77  * about them is returned.
   78  */
   79 #define WNOHANG         0x00000001      /* don't hang in wait */
   80 #define WUNTRACED       0x00000002      /* tell about stopped,
   81                                            untraced children */
   82 #if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE)
   83 #define WALTSIG         0x00000004      /* wait for processes that exit
   84                                            with an alternate signal (i.e.
   85                                            not SIGCHLD) */
   86 #define WALLSIG         0x00000008      /* wait for processes that exit
   87                                            with any signal, i.e. SIGCHLD
   88                                            and alternates */
   89 
   90 /*
   91  * These are the Linux names of some of the above flags, for compatibility
   92  * with Linux's clone(2) API.
   93  */
   94 #define __WCLONE        WALTSIG
   95 #define __WALL          WALLSIG
   96 
   97 /* 
   98  * These bits are used in order to support SVR4 (etc) functionality
   99  * without replicating sys_wait4 5 times.
  100  */
  101 #define WNOWAIT         0x00010000      /* Don't mark child 'P_WAITED' */ 
  102 #define WNOZOMBIE       0x00020000      /* Ignore zombies */
  103 #endif /* _XOPEN_SOURCE || _NETBSD_SOURCE */
  104 
  105 #if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE)
  106 /* POSIX extensions and 4.2/4.3 compatibility: */
  107 
  108 /*
  109  * Tokens for special values of the "pid" parameter to wait4.
  110  */
  111 #define WAIT_ANY        (-1)    /* any process */
  112 #define WAIT_MYPGRP     0       /* any process in my process group */
  113 
  114 #include <sys/types.h>
  115 
  116 /*
  117  * Deprecated:
  118  * Structure of the information in the status word returned by wait4.
  119  * If w_stopval==WSTOPPED, then the second structure describes
  120  * the information returned, else the first.
  121  */
  122 union wait {
  123         int     w_status;               /* used in syscall */
  124         /*
  125          * Terminated process status.
  126          */
  127         struct {
  128 #if BYTE_ORDER == LITTLE_ENDIAN
  129                 unsigned int    w_Termsig:7,    /* termination signal */
  130                                 w_Coredump:1,   /* core dump indicator */
  131                                 w_Retcode:8,    /* exit code if w_termsig==0 */
  132                                 w_Filler:16;    /* upper bits filler */
  133 #endif
  134 #if BYTE_ORDER == BIG_ENDIAN
  135                 unsigned int    w_Filler:16,    /* upper bits filler */
  136                                 w_Retcode:8,    /* exit code if w_termsig==0 */
  137                                 w_Coredump:1,   /* core dump indicator */
  138                                 w_Termsig:7;    /* termination signal */
  139 #endif
  140         } w_T;
  141         /*
  142          * Stopped process status.  Returned
  143          * only for traced children unless requested
  144          * with the WUNTRACED option bit.
  145          */
  146         struct {
  147 #if BYTE_ORDER == LITTLE_ENDIAN
  148                 unsigned int    w_Stopval:8,    /* == W_STOPPED if stopped */
  149                                 w_Stopsig:8,    /* signal that stopped us */
  150                                 w_Filler:16;    /* upper bits filler */
  151 #endif
  152 #if BYTE_ORDER == BIG_ENDIAN
  153                 unsigned int    w_Filler:16,    /* upper bits filler */
  154                                 w_Stopsig:8,    /* signal that stopped us */
  155                                 w_Stopval:8;    /* == W_STOPPED if stopped */
  156 #endif
  157         } w_S;
  158 };
  159 #define w_termsig       w_T.w_Termsig
  160 #define w_coredump      w_T.w_Coredump
  161 #define w_retcode       w_T.w_Retcode
  162 #define w_stopval       w_S.w_Stopval
  163 #define w_stopsig       w_S.w_Stopsig
  164 
  165 #define WSTOPPED        _WSTOPPED
  166 #endif /* _XOPEN_SOURCE || _NETBSD_SOURCE */
  167 
  168 #ifndef _KERNEL
  169 #include <sys/cdefs.h>
  170 
  171 __BEGIN_DECLS
  172 struct rusage;  /* forward declaration */
  173 
  174 pid_t   wait __P((int *));
  175 pid_t   waitpid __P((pid_t, int *, int));
  176 #if defined(_XOPEN_SOURCE) || defined(_NETBSD_SOURCE)
  177 pid_t   wait3 __P((int *, int, struct rusage *));
  178 pid_t   wait4 __P((pid_t, int *, int, struct rusage *));
  179 #endif
  180 __END_DECLS
  181 #endif
  182 
  183 #endif /* !_SYS_WAIT_H_ */

Cache object: 4159f9de8fa6fe8aa88a4a08d0879904


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.