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b7e23e826c
options, status pointer and rusage pointer as arguments. It is up to the caller to copyout the status and rusage to userland if needed. This lets us axe the 'compat' argument and hide all that functionality in owait(), by the way. This also cleans up some locking in kern_wait() since it no longer has to drop locks around copyout() since all the copyout()'s are deferred. - Convert owait(), wait4(), and the various ABI compat wait() syscalls to use kern_wait() rather than wait1() or wait4(). This removes a bit more stackgap usage. Tested on: i386 Compiled on: i386, alpha, amd64
118 lines
4.2 KiB
C
118 lines
4.2 KiB
C
/*-
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* Copyright (c) 1982, 1986, 1989, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)wait.h 8.2 (Berkeley) 7/10/94
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* $FreeBSD$
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*/
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#ifndef _SYS_WAIT_H_
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#define _SYS_WAIT_H_
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#include <sys/cdefs.h>
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/*
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* This file holds definitions relevant to the wait4 system call and the
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* alternate interfaces that use it (wait, wait3, waitpid).
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*/
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/*
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* Macros to test the exit status returned by wait and extract the relevant
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* values.
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*/
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#if __BSD_VISIBLE
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#define _W_INT(w) (*(int *)&(w)) /* Convert union wait to int. */
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#define WCOREFLAG 0200
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#else
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#define _W_INT(i) (i)
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#endif
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#define _WSTATUS(x) (_W_INT(x) & 0177)
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#define _WSTOPPED 0177 /* _WSTATUS if process is stopped */
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#define WIFSTOPPED(x) (_WSTATUS(x) == _WSTOPPED)
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#define WSTOPSIG(x) (_W_INT(x) >> 8)
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#define WIFSIGNALED(x) (_WSTATUS(x) != _WSTOPPED && _WSTATUS(x) != 0)
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#define WTERMSIG(x) (_WSTATUS(x))
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#define WIFEXITED(x) (_WSTATUS(x) == 0)
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#define WEXITSTATUS(x) (_W_INT(x) >> 8)
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#define WIFCONTINUED(x) (x == 0x13) /* 0x13 == SIGCONT */
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#if __BSD_VISIBLE
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#define WCOREDUMP(x) (_W_INT(x) & WCOREFLAG)
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#define W_EXITCODE(ret, sig) ((ret) << 8 | (sig))
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#define W_STOPCODE(sig) ((sig) << 8 | _WSTOPPED)
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#endif
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/*
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* Option bits for the third argument of wait4. WNOHANG causes the
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* wait to not hang if there are no stopped or terminated processes, rather
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* returning an error indication in this case (pid==0). WUNTRACED
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* indicates that the caller should receive status about untraced children
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* which stop due to signals. If children are stopped and a wait without
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* this option is done, it is as though they were still running... nothing
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* about them is returned.
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*/
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#define WNOHANG 1 /* Don't hang in wait. */
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#define WUNTRACED 2 /* Tell about stopped, untraced children. */
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#define WCONTINUED 4 /* Report a job control continued process. */
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#if __BSD_VISIBLE
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#define WLINUXCLONE 0x80000000 /* Wait for kthread spawned from linux_clone. */
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#endif
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/*
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* Tokens for special values of the "pid" parameter to wait4.
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*/
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#if __BSD_VISIBLE
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#define WAIT_ANY (-1) /* any process */
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#define WAIT_MYPGRP 0 /* any process in my process group */
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#endif /* __BSD_VISIBLE */
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#ifdef _KERNEL
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int kern_wait(struct thread *td, pid_t pid, int *status, int options,
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struct rusage *rusage);
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#else
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#include <sys/types.h>
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__BEGIN_DECLS
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struct rusage; /* forward declaration */
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pid_t wait(int *);
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pid_t waitpid(pid_t, int *, int);
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#if __BSD_VISIBLE
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pid_t wait3(int *, int, struct rusage *);
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pid_t wait4(pid_t, int *, int, struct rusage *);
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#endif
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__END_DECLS
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#endif
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#endif /* !_SYS_WAIT_H_ */
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