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#define FUSE_USE_VERSION 30
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <fuse.h>
#include <udisks/udisks.h>
static GMainLoop *main_loop;
static GThread *sub_thread;
static UDisksClient *client;
static GHashTable *mounts;
G_LOCK_DEFINE_STATIC(mounts);
static void udisks_changed(UDisksClient *client, gpointer user_data)
{
GDBusObjectManager *manager = udisks_client_get_object_manager(client);
GList *objs = g_dbus_object_manager_get_objects(manager);
G_LOCK(mounts);
g_debug("udisks changed");
g_hash_table_remove_all(mounts);
for (GList *l = objs; l; l = g_list_next(l)) {
UDisksObject *obj = UDISKS_OBJECT(l->data);
UDisksFilesystem *filesys = udisks_object_get_filesystem(obj);
UDisksBlock *block = udisks_object_get_block(obj);
if (block && filesys) {
const gchar *name = udisks_block_get_id_label(block);
if (!name || strlen(name) == 0) {
name = udisks_block_get_id_uuid(block);
}
const gchar * const * mpoints = udisks_filesystem_get_mount_points(filesys);
const gchar * mountpoint = mpoints && mpoints[0] ? mpoints[0] : NULL;
if (name && mountpoint) {
g_debug("%s -> %s", name, mountpoint);
g_hash_table_insert(mounts, g_strdup(name), g_strdup(mountpoint));
}
}
if (filesys) g_object_unref(filesys);
if (block) g_object_unref(block);
}
G_UNLOCK(mounts);
g_list_free_full(objs, g_object_unref);
}
static gpointer sub_thread_main(gpointer user_data)
{
GError *error = NULL;
client = udisks_client_new_sync(NULL, &error);
if (!client) {
g_printerr("Could not connect to UDisks2 service: %s", error->message);
g_error_free(error);
}
g_signal_connect(client, "changed",
G_CALLBACK(udisks_changed), NULL);
udisks_changed(client, NULL);
g_main_loop_run(main_loop);
}
static void * volumesfs_init(struct fuse_conn_info *conn)
{
main_loop = g_main_loop_new(NULL, FALSE);
mounts = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, g_free);
sub_thread = g_thread_new("volumesfs-sub-thread", sub_thread_main, NULL);
}
static void volumesfs_destroy(void *user_data)
{
g_main_loop_quit(main_loop);
g_thread_join(sub_thread);
g_object_unref(client);
g_hash_table_destroy(mounts);
g_object_unref(main_loop);
}
static int volumesfs_getattr(const char *path, struct stat *stbuf)
{
if (strcmp(path, "/") == 0) {
stbuf->st_mode = S_IFDIR | 0755;
stbuf->st_nlink = 2;
} else {
stbuf->st_mode = S_IFLNK | 0444;
stbuf->st_nlink = 1;
}
return 0;
}
static int volumesfs_readdir(const char *path, void *buf, fuse_fill_dir_t filler,
off_t offset, struct fuse_file_info *fi)
{
if (strcmp(path, "/") != 0) {
return -ENOENT;
}
G_LOCK(mounts);
(void) offset;
(void) fi;
filler(buf, ".", NULL, 0);
filler(buf, "..", NULL, 0);
GHashTableIter iter;
gchar *name;
g_hash_table_iter_init(&iter, mounts);
while (g_hash_table_iter_next(&iter, (void**)&name, NULL)) {
filler(buf, name, NULL, 0);
}
G_UNLOCK(mounts);
}
static int volumesfs_readlink(const char *path, char *buf, size_t size)
{
if (strcmp(path, "/") == 0) {
return -EINVAL;
}
G_LOCK(mounts);
gchar *mountpoint = g_hash_table_lookup(mounts, path + 1);
G_UNLOCK(mounts);
if (mountpoint) {
strcpy(buf, mountpoint);
return 0;
} else {
return -ENOENT;
}
}
static struct fuse_operations volumesfs_oper = {
.init = volumesfs_init,
.destroy = volumesfs_destroy,
.getattr = volumesfs_getattr,
.readdir = volumesfs_readdir,
.readlink = volumesfs_readlink
};
int main(int argc, char *argv[])
{
return fuse_main(argc, argv, &volumesfs_oper, NULL);
}
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