3d0045bb2b
waitid() function is required to be cancellable by the standard. The wait6() and ppoll() follow the other syscalls in their groups. Reviewed by: jhb, jilles (previous versions) Sponsored by: The FreeBSD Foundation MFC after: 1 week
69 lines
2.4 KiB
C
69 lines
2.4 KiB
C
/*-
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* Copyright (c) 2012 Jukka A. Ukkonen
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* All rights reserved.
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*
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* This software was developed by Jukka Ukkonen for FreeBSD.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "namespace.h"
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <stddef.h>
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#include <string.h>
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#include <signal.h>
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#include <errno.h>
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#include "un-namespace.h"
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#include "libc_private.h"
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int
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__waitid(idtype_t idtype, id_t id, siginfo_t *info, int flags)
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{
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int status;
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pid_t ret;
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ret = ((pid_t (*)(idtype_t, id_t, int *, int, struct __wrusage *,
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siginfo_t *))__libc_interposing[INTERPOS_wait6])(idtype, id,
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&status, flags, NULL, info);
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/*
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* According to SUSv4, waitid() shall not return a PID when a
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* process is found, but only 0. If a process was actually
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* found, siginfo_t fields si_signo and si_pid will be
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* non-zero. In case WNOHANG was set in the flags and no
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* process was found those fields are set to zero using
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* memset() below.
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*/
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if (ret == 0 && info != NULL)
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memset(info, 0, sizeof(*info));
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else if (ret > 0)
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ret = 0;
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return (ret);
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}
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__weak_reference(__waitid, waitid);
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__weak_reference(__waitid, _waitid);
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