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Annotation of prex-old/usr/bin/init/init.c, Revision 1.1

1.1     ! nbrk        1: /*
        !             2:  * Copyright (c) 2005-2007, Kohsuke Ohtani
        !             3:  * 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. Neither the name of the author nor the names of any co-contibutors
        !            14:  *    may be used to endorse or promote products derived from this software
        !            15:  *    without specific prior written permission.
        !            16:  *
        !            17:  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
        !            18:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            19:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            20:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
        !            21:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            22:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            23:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            24:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            25:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            26:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            27:  * SUCH DAMAGE.
        !            28:  */
        !            29:
        !            30: #include <prex/prex.h>
        !            31: #include <sys/wait.h>
        !            32:
        !            33: #include <unistd.h>
        !            34: #include <errno.h>
        !            35: #include <fcntl.h>
        !            36: #include <stdio.h>
        !            37: #include <stdlib.h>
        !            38:
        !            39: #define PROGNAME       "/boot/cmdbox"
        !            40:
        !            41: /*
        !            42:  * The mother of all processes.
        !            43:  */
        !            44: int
        !            45: main(int argc, char *argv[])
        !            46: {
        !            47:        pid_t pid;
        !            48:
        !            49:        close(0);
        !            50:        close(1);
        !            51:        close(2);
        !            52:
        !            53:        pid = vfork();
        !            54:
        !            55:        if (pid == -1)
        !            56:                exit(1);
        !            57:
        !            58:        if (pid == 0) {
        !            59:                /*
        !            60:                 * child
        !            61:                 */
        !            62:                signal(SIGHUP, SIG_DFL);
        !            63:                signal(SIGINT, SIG_DFL);
        !            64:                signal(SIGALRM, SIG_DFL);
        !            65:
        !            66:                open("/dev/console", O_RDWR);   /* stdin */
        !            67:                dup(0);                         /* stdout */
        !            68:                dup(0);                         /* stderr */
        !            69:
        !            70:                exit(execve(PROGNAME, 0, 0));
        !            71:        }
        !            72:        /*
        !            73:         * parent
        !            74:         */
        !            75:        thread_setprio(thread_self(), 254);
        !            76:        while (wait((int *)0) != pid);
        !            77:        return 0;
        !            78: }