gen/waitpid-fbsd.c

   1 /*
   2  * Copyright (c) 1988, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #if defined(LIBC_SCCS) && !defined(lint)
  35 static char sccsid[] = "@(#)waitpid.c   8.1 (Berkeley) 6/4/93";
  36 #endif /* LIBC_SCCS and not lint */
  37 #include <sys/cdefs.h>
  38 __FBSDID("$FreeBSD: src/lib/libc/gen/waitpid.c,v 1.6 2002/02/01 00:57:29 obrien Exp $");
  39
  40 #include "namespace.h"
  41 #include <sys/types.h>
  42 #include <sys/time.h>
  43 #include <sys/wait.h>
  44 #include <sys/resource.h>
  45 #include "un-namespace.h"
  46
  47 #if __DARWIN_UNIX03
  48 #include <errno.h>
  49 #endif /* __DARWIN_UNIX03 */
  50 #ifdef VARIANT_CANCELABLE
  51 int __wait4(pid_t, int *, int , struct rusage *);
  52 #else /* !VARIANT_CANCELABLE */
  53 int __wait4_nocancel(pid_t, int *, int , struct rusage *);
  54 #endif /* VARIANT_CANCELABLE */
  55
  56 pid_t
  57 __waitpid(pid_t pid, int *istat, int options)
  58 {
  59 #if __DARWIN_UNIX03
  60         /* POSIX: Validate waitpid() options before calling wait4() */
  61         if ((options & (WCONTINUED | WNOHANG | WUNTRACED)) != options) {
  62                 errno = EINVAL;
  63                 return ((pid_t)-1);
  64         }
  65 #endif  /* __DARWIN_UNIX03 */
  66
  67 #ifdef VARIANT_CANCELABLE
  68         return (__wait4(pid, istat, options, (struct rusage *)0));
  69 #else /* !VARIANT_CANCELABLE */
  70         return (__wait4_nocancel(pid, istat, options, (struct rusage *)0));
  71 #endif /* VARIANT_CANCELABLE */
  72 }
  73
  74 __weak_reference(__waitpid, waitpid);
  75 __weak_reference(__waitpid, _waitpid);