int
guestfs_impl_mount_local (guestfs_h *g, const char *localmountpoint,
const struct guestfs_mount_local_argv *optargs)
{
const char *t;
struct fuse_args args = FUSE_ARGS_INIT (0, NULL);
struct fuse_chan *ch;
int fd;
/* You can only mount each handle in one place in one thread. */
gl_lock_lock (mount_local_lock);
t = g->localmountpoint;
gl_lock_unlock (mount_local_lock);
if (t) {
error (g, _("filesystem is already mounted in another thread"));
return -1;
}
if (optargs->bitmask & GUESTFS_MOUNT_LOCAL_READONLY_BITMASK)
g->ml_read_only = optargs->readonly;
else
g->ml_read_only = 0;
if (optargs->bitmask & GUESTFS_MOUNT_LOCAL_CACHETIMEOUT_BITMASK)
g->ml_dir_cache_timeout = optargs->cachetimeout;
else
g->ml_dir_cache_timeout = 60;
if (optargs->bitmask & GUESTFS_MOUNT_LOCAL_DEBUGCALLS_BITMASK)
g->ml_debug_calls = optargs->debugcalls;
else
g->ml_debug_calls = 0;
/* Initialize the directory caches in the handle. */
if (init_dir_caches (g) == -1)
return -1;
/* Create the FUSE 'args'. */
/* XXX we don't have a program name */
if (fuse_opt_add_arg (&args, "guestfs_mount_local") == -1) {
arg_error:
perrorf (g, _("fuse_opt_add_arg: %s"), localmountpoint);
fuse_opt_free_args (&args);
guestfs_int_free_fuse (g);
return -1;
}
if (optargs->bitmask & GUESTFS_MOUNT_LOCAL_OPTIONS_BITMASK) {
if (fuse_opt_add_arg (&args, "-o") == -1 ||
fuse_opt_add_arg (&args, optargs->options) == -1)
goto arg_error;
}
debug (g, "%s: fuse_mount %s", __func__, localmountpoint);
/* Create the FUSE mountpoint. */
ch = fuse_mount (localmountpoint, &args);
if (ch == NULL) {
perrorf (g, _("fuse_mount: %s"), localmountpoint);
fuse_opt_free_args (&args);
guestfs_int_free_fuse (g);
return -1;
}
/* Set F_CLOEXEC on the channel. XXX libfuse should do this. */
fd = fuse_chan_fd (ch);
if (fd >= 0)
set_cloexec_flag (fd, 1);
debug (g, "%s: fuse_new", __func__);
/* Create the FUSE handle. */
g->fuse = fuse_new (ch, &args,
&mount_local_operations, sizeof mount_local_operations,
g);
if (!g->fuse) {
perrorf (g, _("fuse_new: %s"), localmountpoint);
fuse_unmount (localmountpoint, ch);
fuse_opt_free_args (&args);
guestfs_int_free_fuse (g);
return -1;
}
fuse_opt_free_args (&args);
debug (g, "%s: leaving fuse_mount_local", __func__);
/* Set g->localmountpoint in the handle. */
gl_lock_lock (mount_local_lock);
g->localmountpoint = localmountpoint;
gl_lock_unlock (mount_local_lock);
return 0;
}
int
main (int argc, char *argv[])
{
setlocale (LC_ALL, "");
bindtextdomain (PACKAGE, LOCALEBASEDIR);
textdomain (PACKAGE);
parse_config ();
enum { HELP_OPTION = CHAR_MAX + 1 };
/* The command line arguments are broadly compatible with (a subset
* of) guestfish. Thus we have to deal mainly with -a, -m and --ro.
*/
static const char *options = "a:c:d:im:no:rv?Vwx";
static const struct option long_options[] = {
{ "add", 1, 0, 'a' },
{ "connect", 1, 0, 'c' },
{ "dir-cache-timeout", 1, 0, 0 },
{ "domain", 1, 0, 'd' },
{ "echo-keys", 0, 0, 0 },
{ "format", 2, 0, 0 },
{ "fuse-help", 0, 0, 0 },
{ "help", 0, 0, HELP_OPTION },
{ "inspector", 0, 0, 'i' },
{ "keys-from-stdin", 0, 0, 0 },
{ "live", 0, 0, 0 },
{ "mount", 1, 0, 'm' },
{ "no-sync", 0, 0, 'n' },
{ "option", 1, 0, 'o' },
{ "ro", 0, 0, 'r' },
{ "rw", 0, 0, 'w' },
{ "selinux", 0, 0, 0 },
{ "trace", 0, 0, 'x' },
{ "verbose", 0, 0, 'v' },
{ "version", 0, 0, 'V' },
{ 0, 0, 0, 0 }
};
struct drv *drvs = NULL;
struct drv *drv;
struct mp *mps = NULL;
struct mp *mp;
char *p;
const char *format = NULL;
int c, r;
int option_index;
struct sigaction sa;
int fuse_argc = 0;
const char **fuse_argv = NULL;
#define ADD_FUSE_ARG(str) \
do { \
fuse_argc ++; \
fuse_argv = realloc (fuse_argv, (1+fuse_argc) * sizeof (char *)); \
if (!fuse_argv) { \
perror ("realloc"); \
exit (EXIT_FAILURE); \
} \
fuse_argv[fuse_argc-1] = (str); \
fuse_argv[fuse_argc] = NULL; \
} while (0)
/* LC_ALL=C is required so we can parse error messages. */
setenv ("LC_ALL", "C", 1);
/* Set global program name that is not polluted with libtool artifacts. */
set_program_name (argv[0]);
memset (&sa, 0, sizeof sa);
sa.sa_handler = SIG_IGN;
sa.sa_flags = SA_RESTART;
sigaction (SIGPIPE, &sa, NULL);
/* Various initialization. */
init_dir_caches ();
g = guestfs_create ();
if (g == NULL) {
fprintf (stderr, _("guestfs_create: failed to create handle\n"));
exit (EXIT_FAILURE);
}
guestfs_set_recovery_proc (g, 0);
ADD_FUSE_ARG (program_name);
/* MUST be single-threaded. You cannot have two threads accessing the
* same libguestfs handle, and opening more than one handle is likely
* to be very expensive.
*/
ADD_FUSE_ARG ("-s");
for (;;) {
c = getopt_long (argc, argv, options, long_options, &option_index);
if (c == -1) break;
switch (c) {
case 0: /* options which are long only */
if (STREQ (long_options[option_index].name, "dir-cache-timeout"))
dir_cache_timeout = atoi (optarg);
else if (STREQ (long_options[option_index].name, "fuse-help"))
fuse_help ();
else if (STREQ (long_options[option_index].name, "selinux"))
guestfs_set_selinux (g, 1);
else if (STREQ (long_options[option_index].name, "format")) {
if (!optarg || STREQ (optarg, ""))
format = NULL;
else
format = optarg;
} else if (STREQ (long_options[option_index].name, "keys-from-stdin")) {
keys_from_stdin = 1;
} else if (STREQ (long_options[option_index].name, "echo-keys")) {
echo_keys = 1;
} else if (STREQ (long_options[option_index].name, "live")) {
live = 1;
} else {
fprintf (stderr, _("%s: unknown long option: %s (%d)\n"),
program_name, long_options[option_index].name, option_index);
exit (EXIT_FAILURE);
}
break;
case 'a':
OPTION_a;
break;
case 'c':
OPTION_c;
break;
case 'd':
OPTION_d;
break;
case 'i':
OPTION_i;
break;
case 'm':
OPTION_m;
break;
case 'n':
OPTION_n;
break;
case 'o':
ADD_FUSE_ARG ("-o");
ADD_FUSE_ARG (optarg);
break;
case 'r':
OPTION_r;
break;
case 'v':
OPTION_v;
break;
case 'V':
OPTION_V;
break;
case 'w':
OPTION_w;
break;
case 'x':
OPTION_x;
ADD_FUSE_ARG ("-f");
guestfs_set_recovery_proc (g, 1);
trace_calls = 1;
break;
case HELP_OPTION:
usage (EXIT_SUCCESS);
default:
usage (EXIT_FAILURE);
}
}
/* Check we have the right options. */
if (!live) {
if (!drvs || !(mps || inspector)) {
fprintf (stderr,
_("%s: must have at least one -a/-d and at least one -m/-i option\n"),
program_name);
exit (EXIT_FAILURE);
}
} else {
size_t count_d = 0, count_other = 0;
struct drv *drv;
if (read_only) {
fprintf (stderr,
_("%s: --live is not compatible with --ro option\n"),
program_name);
exit (EXIT_FAILURE);
}
if (inspector) {
fprintf (stderr,
_("%s: --live is not compatible with -i option\n"),
program_name);
exit (EXIT_FAILURE);
}
/* --live: make sure there was one -d option and no -a options */
for (drv = drvs; drv; drv = drv->next) {
if (drv->type == drv_d)
count_d++;
else
count_other++;
}
if (count_d != 1) {
fprintf (stderr,
_("%s: with --live, you must use exactly one -d option\n"),
program_name);
exit (EXIT_FAILURE);
}
if (count_other != 0) {
fprintf (stderr,
_("%s: --live is not compatible with -a option\n"),
program_name);
exit (EXIT_FAILURE);
}
}
/* We'd better have a mountpoint. */
if (optind+1 != argc) {
fprintf (stderr,
_("%s: you must specify a mountpoint in the host filesystem\n"),
program_name);
exit (EXIT_FAILURE);
}
/* Do the guest drives and mountpoints. */
add_drives (drvs, 'a');
if (guestfs_launch (g) == -1)
exit (EXIT_FAILURE);
if (inspector)
inspect_mount ();
mount_mps (mps);
free_drives (drvs);
free_mps (mps);
/* FUSE example does this, not clear if it's necessary, but ... */
if (guestfs_umask (g, 0) == -1)
exit (EXIT_FAILURE);
/* At the last minute, remove the libguestfs error handler. In code
* above this point, the default error handler has been used which
* sends all errors to stderr. Now before entering FUSE itself we
* want to silence errors so we can convert them (see error()
* function above).
*/
guestfs_set_error_handler (g, NULL, NULL);
/* Finish off FUSE args. */
ADD_FUSE_ARG (argv[optind]);
/*
It says about the line containing the for-statement:
error: assuming signed overflow does not occur when simplifying conditional to constant [-Wstrict-overflow]
if (verbose) {
fprintf (stderr, "guestmount: invoking FUSE with args [");
for (i = 0; i < fuse_argc; ++i) {
if (i > 0) fprintf (stderr, ", ");
fprintf (stderr, "%s", fuse_argv[i]);
}
fprintf (stderr, "]\n");
}
*/
r = fuse_main (fuse_argc, (char **) fuse_argv, &fg_operations, NULL);
/* Cleanup. */
guestfs_close (g);
free_dir_caches ();
exit (r == 0 ? EXIT_SUCCESS : EXIT_FAILURE);
}