int main(int argc, char *argv[])
{
struct fuse_args args = FUSE_ARGS_INIT(argc, argv);
char *mountpoint;
int err = -1;
int fd;
if (fuse_parse_cmdline(&args, &mountpoint, NULL, NULL) != -1 &&
(fd = fuse_mount(mountpoint, &args)) != -1) {
struct fuse_session *se;
se = fuse_lowlevel_new(&args, &hello_ll_oper, sizeof(hello_ll_oper),
NULL);
if (se != NULL) {
if (fuse_set_signal_handlers(se) != -1) {
struct fuse_chan *ch = fuse_kern_chan_new(fd);
if (ch != NULL) {
fuse_session_add_chan(se, ch);
err = fuse_session_loop(se);
}
fuse_remove_signal_handlers(se);
}
fuse_session_destroy(se);
}
close(fd);
}
fuse_unmount(mountpoint);
fuse_opt_free_args(&args);
return err ? 1 : 0;
}
static struct fuse_chan *fuse_mount_common(const char *mountpoint,
struct fuse_args *args)
{
struct fuse_chan *ch;
int fd;
/*
* Make sure file descriptors 0, 1 and 2 are open, otherwise chaos
* would ensue.
*/
do {
fd = open("/dev/null", O_RDWR);
if (fd > 2)
close(fd);
} while (fd >= 0 && fd <= 2);
fd = fuse_mount_compat25(mountpoint, args);
if (fd == -1)
return NULL;
ch = fuse_kern_chan_new(fd);
if (!ch)
fuse_kern_unmount(mountpoint, fd);
return ch;
}
// Do a mount for helper_thread()
static void helper_thread_mount(mount_t * m)
{
Dprintf("%s(\"%s\")\n", __FUNCTION__, m->fstitch_path);
if ((m->channel_fd = fuse_mount(m->mountpoint, &m->args)) == -1)
{
fprintf(stderr, "%s(): fuse_mount(\"%s\") failed. (Does the mountpoint exist?)\n", __FUNCTION__, m->mountpoint);
return;
}
if (!(m->session = fuse_lowlevel_new(&m->args, ops, ops_len, m)))
{
fprintf(stderr, "%s(): fuse_lowlevel_new() failed\n", __FUNCTION__);
return;
}
if (!(m->channel = fuse_kern_chan_new(m->channel_fd)))
{
fprintf(stderr, "%s(): fuse_kern_chan_new() failed\n", __FUNCTION__);
return;
}
fuse_session_add_chan(m->session, m->channel);
if (fuse_chan_bufsize(m->channel) != fuse_serve_mount_chan_bufsize())
fprintf(stderr, "bufsizes differ!\n");
m->mounted = 1;
printf("Mounted \"%s\" from %s\n", m->fstitch_path, modman_name_cfs(m->cfs));
}
static int mount_root(int argc, char ** argv)
{
Dprintf("%s()\n", __FUNCTION__);
if (!(root = calloc(1, sizeof(*root))))
return -ENOMEM;
// We can't use FUSE_ARGS_INIT() here so assert we are initing the
// whole structure
static_assert(sizeof(root->args) == sizeof(argc) + sizeof(argv) + sizeof(int));
root->args.argc = argc;
root->args.argv = argv;
root->args.allocated = 0;
if (!(root->fstitch_path = strdup("")))
return -ENOMEM;
if (!(root->parents = hash_map_create()))
return -ENOMEM;
root->cfs = NULL; // set later via fuse_serve_mount_set_root()
if (fuse_parse_cmdline(&root->args, &root->mountpoint, NULL, NULL) == -1)
{
fprintf(stderr, "%s(): fuse_parse_cmdline() failed\n", __FUNCTION__);
return -1;
}
if ((root->channel_fd = fuse_mount(root->mountpoint, &root->args)) == -1)
{
fprintf(stderr, "%s():%d: fuse_mount(\"%s\") failed\n", __FUNCTION__, __LINE__, root->mountpoint);
return -1;
}
if (!(root->session = fuse_lowlevel_new(&root->args, ops, ops_len, root)))
{
fprintf(stderr, "%s(): fuse_lowlevel_new() failed\n", __FUNCTION__);
return -1;
}
if (!(root->channel = fuse_kern_chan_new(root->channel_fd)))
{
fprintf(stderr, "%s(): fuse_kern_chan_new() failed\n", __FUNCTION__);
return -1;
}
fuse_session_add_chan(root->session, root->channel);
mounts_insert(root);
root->mounted = 1;
return 0;
}
static sqfs_err sqfs_ll_mount(sqfs_ll_chan *ch, const char *mountpoint,
struct fuse_args *args) {
#ifdef HAVE_NEW_FUSE_UNMOUNT
ch->ch = fuse_mount(mountpoint, args);
#else
ch->fd = fuse_mount(mountpoint, args);
if (ch->fd == -1)
return SQFS_ERR;
ch->ch = fuse_kern_chan_new(ch->fd);
#endif
return ch->ch ? SQFS_OK : SQFS_ERR;
}
static struct fuse_chan *fuse_mount_common(const char *mountpoint,
struct fuse_args *args)
{
struct fuse_chan *ch;
int fd = fuse_mount_compat25(mountpoint, args);
if (fd == -1)
return NULL;
ch = fuse_kern_chan_new(fd);
if (!ch)
fuse_kern_unmount(mountpoint, fd);
return ch;
}
struct fuse_session *cuse_lowlevel_setup(int argc, char *argv[],
const struct cuse_info *ci,
const struct cuse_lowlevel_ops *clop,
int *multithreaded, void *userdata)
{
const char *devname = "/dev/cuse";
static const struct fuse_opt kill_subtype_opts[] = {
FUSE_OPT_KEY("subtype=", FUSE_OPT_KEY_DISCARD),
FUSE_OPT_END
};
struct fuse_args args = FUSE_ARGS_INIT(argc, argv);
struct fuse_session *se;
struct fuse_chan *ch;
int fd;
int foreground;
int res;
res = fuse_parse_cmdline(&args, NULL, multithreaded, &foreground);
if (res == -1)
goto err_args;
res = fuse_opt_parse(&args, NULL, kill_subtype_opts, NULL);
if (res == -1)
goto err_args;
/*
* Make sure file descriptors 0, 1 and 2 are open, otherwise chaos
* would ensue.
*/
do {
fd = open("/dev/null", O_RDWR);
if (fd > 2)
close(fd);
} while (fd >= 0 && fd <= 2);
se = cuse_lowlevel_new(&args, ci, clop, userdata);
fuse_opt_free_args(&args);
if (se == NULL)
goto err_args;
fd = open(devname, O_RDWR);
if (fd == -1) {
if (errno == ENODEV || errno == ENOENT)
fprintf(stderr, "cuse: device not found, try 'modprobe cuse' first\n");
else
fprintf(stderr, "cuse: failed to open %s: %s\n",
devname, strerror(errno));
goto err_se;
}
ch = fuse_kern_chan_new(fd);
if (!ch) {
close(fd);
goto err_se;
}
fuse_session_add_chan(se, ch);
res = fuse_set_signal_handlers(se);
if (res == -1)
goto err_se;
res = fuse_daemonize(foreground);
if (res == -1)
goto err_sig;
return se;
err_sig:
fuse_remove_signal_handlers(se);
err_se:
fuse_session_destroy(se);
err_args:
fuse_opt_free_args(&args);
return NULL;
}
