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83 lines
2.2 KiB
C
83 lines
2.2 KiB
C
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/* Pseudo implementation of waitid.
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Copyright (C) 1997, 1998, 2000 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Zack Weinberg <zack@rabi.phys.columbia.edu>, 1997.
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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 Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <errno.h>
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#include <signal.h>
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#define __need_NULL
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#include <stddef.h>
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#include <sys/wait.h>
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#include <sys/types.h>
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#include <assert.h>
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extern pid_t kwaitpid (int *stat_loc, pid_t pid, int options,
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struct rusage *ru_loc, siginfo_t *infop);
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int
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waitid (idtype, id, infop, options)
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idtype_t idtype;
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id_t id;
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siginfo_t *infop;
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int options;
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{
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pid_t pid, child;
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int status;
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switch (idtype)
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{
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case P_PID:
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if(id <= 0)
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goto invalid;
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pid = (pid_t) id;
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break;
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case P_PGID:
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if (id < 0 || id == 1)
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goto invalid;
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pid = (pid_t) -id;
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break;
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case P_ALL:
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pid = -1;
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break;
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default:
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invalid:
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__set_errno (EINVAL);
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return -1;
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}
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/* Technically we're supposed to return EFAULT if infop is bogus,
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but that would involve mucking with signals, which is
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too much hassle. User will have to deal with SIGSEGV/SIGBUS.
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We just check for a null pointer. */
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if (infop == NULL)
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{
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__set_errno (EFAULT);
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return -1;
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}
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child = kwaitpid (&status, pid, options, NULL, infop);
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if (child == -1)
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/* `waitpid' set `errno' for us. */
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return -1;
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return 0;
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}
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