waitpid.cpp

Go to the documentation of this file.

/*
 * Copyright (C) 2009 Niek Linnenbank
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#include <FreeNOS/User.h>
#include "sys/wait.h"
#include "sys/types.h"
#include <errno.h>
 
pid_t waitpid(pid_t pid, int *stat_loc, int options)
{
    const ulong result = (ulong) ProcessCtl(pid, WaitPID);
 
    switch ((const API::Result) (result & 0xffff))
    {
        case API::NotFound:
            errno = ESRCH;
            return (pid_t) -1;
 
        case API::Success:
            if (stat_loc)
            {
                *stat_loc = result >> 16;
            }
            return pid;
 
        default:
            errno = EIO;
            return (pid_t) -1;
    }
}