mntudev.c

/***************************************************************************
 * CVSID: $Id: mntudev.c,v 1.3 2004/12/19 00:13:08 stefanb Exp $
 *
 * mntudev.c : Sending dbus signal to MNT daemon from udev call
 *
 * Copyright (C) 2004 Stefan Bambach, <sbambach@gmx.net>
 *
 * Licensed under the GNU General Public License 2.0
 *
 * 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 2 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 **************************************************************************/
 
#ifdef HAVE_CONFIG_H
#  include <config.h>
#endif

#include <stdlib.h>
#include <glib.h>

#include "mntdbus.h"
#include "mntudev.h"
#include "errmanager.h"
#include "libmnt/libmnt.h"
#include "dbug_mem.h"


int main(int argc, char **argv)
{
    DBusConnection *conn = NULL;
    char *subsystem = NULL;
    char *action = NULL;
    char *devname = NULL;
    char *devpath = NULL;
    gchar **gparts = NULL;
    gchar **gparts_it = NULL;
    int gparts_idx = 0;
    int res = 0;
    
    // initialize error manager
    emInit(LOG_DEBUG, EM_TYPE_SYSLOG, NULL, NULL, NULL, "mntudev");
    
    // check for devpath
    devpath = mntdbus_getenv("DEVPATH");
    if (devpath == NULL) {
        goto error;
    }
    
    // check for action
    action = mntdbus_getenv("ACTION");
    if (action == NULL) {
        goto error;
    }
    
    // check for devname
    devname = mntdbus_getenv("DEVNAME");
    if (devname == NULL) {
        goto error;
    }
    
    // get subsystem
    gparts = g_strsplit(devpath, G_DIR_SEPARATOR_S, 0);
    if (gparts == NULL) {
        MSG_ERR("Out of memory.");
        goto error;
    }
    gparts_it = gparts;
    while (*gparts_it != NULL) {
        // check for first path of e.g. '/block/...'
        if (gparts_idx == 1) {
            subsystem = *gparts_it;
        }
        gparts_it++;
        gparts_idx++;
    }
    if (subsystem == NULL) {
        MSG_ERR("DEVPATH '%s' in invalid.", devpath);
        goto error;
    }

    // check handled types
    if (strcmp(subsystem, "block")!=0 && 
         strcmp(subsystem, "tty")!=0 &&
         strcmp(subsystem, "disc")!=0) {
        MSG_ERR("type '%s' not handled by mntudev (only 'tty', 'block' and 'disc').", subsystem);
        goto error;
    }
    
    // connect to dbus
    conn = mntdbus_init();
    if (conn == NULL) {
        MSG_ERR("Couldn't connect to dbus!");
        goto error;
    }
    
    // handle action
    if (strcmp(action, "add")==0) {
        if (mntdbus_add(conn, subsystem, devname) != 0) {
            MSG_ERR("Error sending add message");
            goto error;
        }
    } else if (strcmp(action, "remove")==0) {
        if (mntdbus_remove(conn, subsystem, devname) != 0) {
            MSG_ERR("Error sending remove message");
            goto error;
        }
    } else {
        MSG_ERR("Unknown ACTION '%s'.", action);
        goto error;
    }
    
    goto cleanup;
    
error:
    if (conn!=NULL) {
        mntdbus_quit(conn);
        conn = NULL;
    }
    res = -1;
    
cleanup:    
    if (gparts != NULL) {
        g_strfreev(gparts);
        gparts = NULL;
    }

    return res;
}

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