Mntd - Auto mount daemon for hotplug devices

0.3.4 Copyright © 2004 Stefan Bambach < stefan @ bambach . biz >

Distributed under the GPL (daemon) and LGPL (library) license, see COPYING for details.

Introduction

mntd is an automount daemon and shared library written in C for automatically mount hotplug devices like USB sticks, Compact Flash cards or other mountable devices on linux 2.6.x kernels.

You only have to plug in your hotplug device and wait a little bit. Use the library, for user mode programs, that want to be informed, if new devices will be mounted and others unmounted.

Examples

Example Function to integrate the mainloop into glibs mainloop

    void main_loop(DBusConnection* dbus_connection, void *user_data)
    {
        dbus_connection_setup_with_g_main(dbus_connection, NULL);
        return;
    }

Callback function that will be called, if volume was mounted

    void volume_mounted(const char* udi, const char* mntpnt, void *user_data)
    {
        printf("volume_mounted('%s', '%s', 0x%p) called\n", udi, mntpnt, user_data);
        return;
    }

Callback function that will be called, if volume was unmounted

    void volume_unmounted(const char* udi, const char* mntpnt, void *user_data)
    {
        printf("volume_unmounted('%s', '%s', 0x%p) called\n", udi, mntpnt, user_data);
        return;
    }

Define the callback functions, for later use

    LIBMNTFUNCS mnt_functions = {   main_loop,
                                            volume_mounted, 
                                            volume_unmounted};

Example of main() function from lsmnt.c

    int main(int argc, char* argv[])
    {
        GMainLoop* loop;
        int num_volumes=0;
        char **data = NULL;
        int i=0;
        char *udi = NULL;
        char *mntpnt = NULL;
    
        // print version info
        fprintf(stderr, "lsmnt v" PACKAGE_VERSION "\n");
        
        // get glib main loop
        loop = g_main_loop_new (NULL, FALSE);
        
        // initialize mnt library
        if (mnt_init(&mnt_functions, NULL) == -1) {
            fprintf(stderr, "error: mnt_init failed\n");
            exit(1);
        }
    
        // get all data
        data = mnt_get_all_volumes(&num_volumes);
        if (data != NULL) {
            for (i=0; i<num_volumes; i++) {
                udi = data[i];
                if (udi != NULL) {
                    printf("volume%d = '%s'\n", i, udi);
                    // get the mount point
                    mntpnt = mnt_get_mntpnt(udi);
                    if (mntpnt != NULL) {
                        printf("    -> mntpnt = '%s'\n", mntpnt);
                        free(mntpnt);
                        mntpnt = NULL;
                    }
                    free(udi);
                    udi = NULL;
                }
            }
            free(data);
            data = NULL;
            num_volumes = 0;
        }
        
        // start program
        g_main_loop_run(loop);
        
        // free libraries resources
        mnt_quit();
        
        // exit
        return 0;
    }