libc/unistd/wait.c

/*
 * Copyright (C) 2008 The Android Open Source Project
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */
#include <sys/wait.h>
#include <stddef.h>

extern pid_t  __wait4 (pid_t pid, int *status, int options, struct rusage *rusage);
extern int    __waitid(idtype_t which, id_t id, siginfo_t *info, int options, struct rusage *ru);

pid_t  wait( int*  status )
{
    return __wait4( (pid_t)-1, status, 0, NULL );
}

pid_t  wait3(int*  status, int options, struct rusage*  rusage)
{
    return __wait4( (pid_t)-1, status, options, rusage );
}

pid_t  waitpid(pid_t  pid, int*  status, int  options)
{
    return __wait4( pid, status, options, NULL );
}

int  waitid(idtype_t which, id_t id, siginfo_t *info, int options)
{
    /* the system call takes an option struct rusage that we don't need */
    return __waitid(which, id, info, options, NULL);
}