source: mainline/uspace/app/init/init.c@ cc1f8d4

/*
 * Copyright (c) 2005 Martin Decky
 * 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.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 */

/** @addtogroup init Init
 * @brief Init process for user space environment configuration.
 * @{
 */
/**
 * @file
 */

#include <stdio.h>
#include <unistd.h>
#include <ipc/ipc.h>
#include <vfs/vfs.h>
#include <bool.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <task.h>
#include <malloc.h>
#include <macros.h>
#include <string.h>
#include <devmap.h>
#include "init.h"

static void info_print(void)
{
        printf(NAME ": HelenOS init\n");
}

static bool mount_root(const char *fstype)
{
        char *opts = "";
        const char *root_dev = "initrd";
        
        if (str_cmp(fstype, "tmpfs") == 0)
                opts = "restore";
        
        int rc = mount(fstype, "/", root_dev, opts, IPC_FLAG_BLOCKING);
        
        switch (rc) {
        case EOK:
                printf(NAME ": Root filesystem mounted, %s at %s\n",
                    fstype, root_dev);
                break;
        case EBUSY:
                printf(NAME ": Root filesystem already mounted\n");
                return false;
        case ELIMIT:
                printf(NAME ": Unable to mount root filesystem\n");
                return false;
        case ENOENT:
                printf(NAME ": Unknown filesystem type (%s)\n", fstype);
                return false;
        default:
                printf(NAME ": Error mounting root filesystem (%d)\n", rc);
                return false;
        }
        
        return true;
}

static bool mount_devfs(void)
{
        char null[MAX_DEVICE_NAME];
        int null_id = devmap_null_create();
        
        if (null_id == -1) {
                printf(NAME ": Unable to create null device\n");
                return false;
        }
        
        snprintf(null, MAX_DEVICE_NAME, "null%d", null_id);
        int rc = mount("devfs", "/dev", null, "", IPC_FLAG_BLOCKING);
        
        switch (rc) {
        case EOK:
                printf(NAME ": Device filesystem mounted\n");
                break;
        case EBUSY:
                printf(NAME ": Device filesystem already mounted\n");
                devmap_null_destroy(null_id);
                return false;
        case ELIMIT:
                printf(NAME ": Unable to mount device filesystem\n");
                devmap_null_destroy(null_id);
                return false;
        case ENOENT:
                printf(NAME ": Unknown filesystem type (devfs)\n");
                devmap_null_destroy(null_id);
                return false;
        default:
                printf(NAME ": Error mounting device filesystem (%d)\n", rc);
                devmap_null_destroy(null_id);
                return false;
        }
        
        return true;
}

static void spawn(char *fname)
{
        char *argv[2];
        struct stat s;
        
        if (stat(fname, &s) == ENOENT)
                return;
        
        printf(NAME ": Spawning %s\n", fname);
        
        argv[0] = fname;
        argv[1] = NULL;
        
        if (!task_spawn(fname, argv))
                printf(NAME ": Error spawning %s\n", fname);
}

static void srv_start(char *fname)
{
        char *argv[2];
        task_id_t id;
        task_exit_t texit;
        int rc, retval;
        struct stat s;
        
        if (stat(fname, &s) == ENOENT)
                return;
        
        printf(NAME ": Starting %s\n", fname);
        
        argv[0] = fname;
        argv[1] = NULL;
        
        id = task_spawn(fname, argv);
        if (!id) {
                printf(NAME ": Error spawning %s\n", fname);
                return;
        }

        rc = task_wait(id, &texit, &retval);
        if (rc != EOK) {
                printf(NAME ": Error waiting for %s\n", fname);
                return;
        }

        if (texit != TASK_EXIT_NORMAL || retval != 0) {
                printf(NAME ": Server %s failed to start (returned %d)\n",
                        fname, retval);
        }
}

static void getvc(char *dev, char *app)
{
        char *argv[4];
        char vc[MAX_DEVICE_NAME];
        int rc;
        
        snprintf(vc, MAX_DEVICE_NAME, "/dev/%s", dev);
        
        printf(NAME ": Spawning getvc on %s\n", vc);
        
        dev_handle_t handle;
        rc = devmap_device_get_handle(dev, &handle, IPC_FLAG_BLOCKING);
        
        if (rc == EOK) {
                argv[0] = "/app/getvc";
                argv[1] = vc;
                argv[2] = app;
                argv[3] = NULL;
                
                if (!task_spawn("/app/getvc", argv))
                        printf(NAME ": Error spawning getvc on %s\n", vc);
        } else {
                printf(NAME ": Error waiting on %s\n", vc);
        }
}

static void mount_data(void)
{
        int rc;

        printf("Trying to mount disk0 on /data... ");
        fflush(stdout);

        rc = mount("fat", "/data", "disk0", "wtcache", 0);
        if (rc == EOK)
                printf("OK\n");
        else
                printf("Failed\n");
}

int main(int argc, char *argv[])
{
        info_print();
        
        if (!mount_root(STRING(RDFMT))) {
                printf(NAME ": Exiting\n");
                return -1;
        }
        
        spawn("/srv/devfs");
        
        if (!mount_devfs()) {
                printf(NAME ": Exiting\n");
                return -2;
        }
        
        spawn("/srv/fb");
        spawn("/srv/kbd");
        spawn("/srv/console");
        spawn("/srv/fhc");
        spawn("/srv/obio");

        /*
         * Start these synchronously so that mount_data() can be
         * non-blocking.
         */
#ifdef CONFIG_START_BD
        srv_start("/srv/ata_bd");
        srv_start("/srv/gxe_bd");
#else
        (void) srv_start;
#endif

#ifdef CONFIG_MOUNT_DATA
        mount_data();
#else
        (void) mount_data;
#endif

        getvc("vc0", "/app/bdsh");
        getvc("vc1", "/app/bdsh");
        getvc("vc2", "/app/bdsh");
        getvc("vc3", "/app/bdsh");
        getvc("vc4", "/app/bdsh");
        getvc("vc5", "/app/bdsh");
        getvc("vc6", "/app/klog");
        
        return 0;
}

/** @}
 */