51 lines
1.8 KiB
C
51 lines
1.8 KiB
C
/* Copyright (C) 1991-2019 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <sys/wait.h>
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#include <sys/types.h>
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/* Wait for a child matching PID to die.
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If PID is greater than 0, match any process whose process ID is PID.
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If PID is (pid_t) -1, match any process.
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If PID is (pid_t) 0, match any process with the
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same process group as the current process.
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If PID is less than -1, match any process whose
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process group is the absolute value of PID.
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If the WNOHANG bit is set in OPTIONS, and that child
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is not already dead, return (pid_t) 0. If successful,
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return PID and store the dead child's status in STAT_LOC.
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Return (pid_t) -1 for errors. If the WUNTRACED bit is set in OPTIONS,
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return status for stopped children; otherwise don't. */
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pid_t
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__waitpid (pid_t pid, int *stat_loc, int options)
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{
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if ((options & ~(WNOHANG|WUNTRACED)) != 0)
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{
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__set_errno (EINVAL);
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return (pid_t) -1;
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}
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__set_errno (ENOSYS);
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return (pid_t) -1;
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}
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libc_hidden_def (__waitpid)
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weak_alias (__waitpid, waitpid)
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stub_warning (waitpid)
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