static void
try_df (const char *name, const char *uuid,
const char *dev, int offset)
{
struct guestfs_statvfs *stat = NULL;
guestfs_error_handler_cb old_error_cb;
void *old_error_data;
if (verbose)
fprintf (stderr, "try_df %s %s %d\n", name, dev, offset);
/* Try mounting and stating the device. This might reasonably fail,
* so don't show errors.
*/
old_error_cb = guestfs_get_error_handler (g, &old_error_data);
guestfs_set_error_handler (g, NULL, NULL);
if (guestfs_mount_ro (g, dev, "/") == 0) {
stat = guestfs_statvfs (g, "/");
guestfs_umount_all (g);
}
guestfs_set_error_handler (g, old_error_cb, old_error_data);
if (stat) {
print_stat (name, uuid, dev, offset, stat);
guestfs_free_statvfs (stat);
}
}
int
run_supported (const char *cmd, size_t argc, char *argv[])
{
char **groups;
/* As a side-effect this also checks that we've called 'launch'. */
groups = guestfs_available_all_groups (g);
if (groups == NULL)
return -1;
/* Temporarily replace the error handler so that messages don't get
* printed to stderr while we are issuing commands.
*/
guestfs_error_handler_cb old_error_cb;
void *old_error_cb_data;
old_error_cb = guestfs_get_error_handler (g, &old_error_cb_data);
guestfs_set_error_handler (g, NULL, NULL);
/* Work out the max string length of any group name. */
size_t i;
size_t len = 0;
for (i = 0; groups[i] != NULL; ++i) {
size_t l = strlen (groups[i]);
if (l > len)
len = l;
}
for (i = 0; groups[i] != NULL; ++i) {
size_t l = strlen (groups[i]);
size_t j;
for (j = 0; j < len-l; ++j)
putchar (' ');
printf ("%s", groups[i]);
putchar (' ');
char *gg[] = { groups[i], NULL };
int r = guestfs_available (g, gg);
if (r == 0)
printf ("%s", _("yes"));
else
printf ("%s", _("no"));
putchar ('\n');
}
/* Free groups list. */
for (i = 0; groups[i] != NULL; ++i)
free (groups[i]);
free (groups);
/* Restore error handler. */
guestfs_set_error_handler (g, old_error_cb, old_error_cb_data);
return 0;
}
/* Guestfs.create */
CAMLprim value
ocaml_guestfs_create (void)
{
CAMLparam0 ();
CAMLlocal1 (gv);
guestfs_h *g;
value *v;
g = guestfs_create ();
if (g == NULL)
caml_failwith ("failed to create guestfs handle");
guestfs_set_error_handler (g, NULL, NULL);
gv = Val_guestfs (g);
/* Store the OCaml handle into the C handle. This is only so we can
* map the C handle to the OCaml handle in event_callback_wrapper.
*/
v = guestfs_safe_malloc (g, sizeof *v);
*v = gv;
/* XXX This global root is generational, but we cannot rely on every
* user having the OCaml 3.11 version which supports this.
*/
caml_register_global_root (v);
guestfs_set_private (g, "_ocaml_g", v);
CAMLreturn (gv);
}
/* Guestfs.create */
value
ocaml_guestfs_create (value environmentv, value close_on_exitv, value unitv)
{
CAMLparam3 (environmentv, close_on_exitv, unitv);
CAMLlocal1 (gv);
unsigned flags = 0;
guestfs_h *g;
if (environmentv != Val_int (0) &&
!Bool_val (Field (environmentv, 0)))
flags |= GUESTFS_CREATE_NO_ENVIRONMENT;
if (close_on_exitv != Val_int (0) &&
!Bool_val (Field (close_on_exitv, 0)))
flags |= GUESTFS_CREATE_NO_CLOSE_ON_EXIT;
g = guestfs_create_flags (flags);
if (g == NULL)
caml_failwith ("failed to create guestfs handle");
guestfs_set_error_handler (g, NULL, NULL);
gv = Val_guestfs (g);
CAMLreturn (gv);
}
void
guestfs_push_error_handler (guestfs_h *g,
guestfs_error_handler_cb cb, void *data)
{
struct error_cb_stack *old_stack;
old_stack = g->error_cb_stack;
g->error_cb_stack = safe_malloc (g, sizeof (struct error_cb_stack));
g->error_cb_stack->next = old_stack;
g->error_cb_stack->error_cb = g->error_cb;
g->error_cb_stack->error_cb_data = g->error_cb_data;
guestfs_set_error_handler (g, cb, data);
}
JNIEXPORT jlong JNICALL
Java_com_redhat_et_libguestfs_GuestFS__1create (JNIEnv *env,
jobject obj_unused, jint flags)
{
guestfs_h *g;
g = guestfs_create_flags ((int) flags);
if (g == NULL) {
throw_exception (env, "GuestFS.create: failed to allocate handle");
return 0;
}
guestfs_set_error_handler (g, NULL, NULL);
return (jlong) (long) g;
}
void
guestfs_pop_error_handler (guestfs_h *g)
{
struct error_cb_stack *next_stack;
if (g->error_cb_stack) {
next_stack = g->error_cb_stack->next;
guestfs_set_error_handler (g, g->error_cb_stack->error_cb,
g->error_cb_stack->error_cb_data);
free (g->error_cb_stack);
g->error_cb_stack = next_stack;
}
else
guestfs___init_error_handler (g);
}
PyObject *
py_guestfs_create (PyObject *self, PyObject *args)
{
guestfs_h *g;
g = guestfs_create ();
if (g == NULL) {
PyErr_SetString (PyExc_RuntimeError,
"guestfs.create: failed to allocate handle");
return NULL;
}
guestfs_set_error_handler (g, NULL, NULL);
/* This can return NULL, but in that case put_handle will have
* set the Python error string.
*/
return put_handle (g);
}
/* Guestfs.create */
value
ocaml_guestfs_create (value environmentv, value close_on_exitv, value unitv)
{
CAMLparam3 (environmentv, close_on_exitv, unitv);
CAMLlocal1 (gv);
unsigned flags = 0;
guestfs_h *g;
value *v;
if (environmentv != Val_int (0) &&
!Bool_val (Field (environmentv, 0)))
flags |= GUESTFS_CREATE_NO_ENVIRONMENT;
if (close_on_exitv != Val_int (0) &&
!Bool_val (Field (close_on_exitv, 0)))
flags |= GUESTFS_CREATE_NO_CLOSE_ON_EXIT;
g = guestfs_create_flags (flags);
if (g == NULL)
caml_failwith ("failed to create guestfs handle");
guestfs_set_error_handler (g, NULL, NULL);
gv = Val_guestfs (g);
/* Store the OCaml handle into the C handle. This is only so we can
* map the C handle to the OCaml handle in event_callback_wrapper.
*/
v = guestfs_int_safe_malloc (g, sizeof *v);
*v = gv;
/* XXX This global root is generational, but we cannot rely on every
* user having the OCaml 3.11 version which supports this.
*/
caml_register_global_root (v);
guestfs_set_private (g, "_ocaml_g", v);
CAMLreturn (gv);
}
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);
}
int
run_reopen (const char *cmd, size_t argc, char *argv[])
{
guestfs_h *g2;
int r;
const char *p;
guestfs_error_handler_cb cb;
void *cb_data;
if (argc > 0) {
fprintf (stderr, _("'reopen' command takes no parameters\n"));
return -1;
}
if (guestfs_shutdown (g) == -1)
return -1;
/* Open the new handle first, so we can copy the settings from the
* old one to the new one, and also so if it fails we still have an
* open handle.
*/
g2 = guestfs_create ();
if (g2 == NULL) {
fprintf (stderr, _("reopen: guestfs_create: failed to create handle\n"));
return -1;
}
/* Now copy some of the settings from the old handle. The settings
* we copy are those which are set by guestfish itself.
*/
cb = guestfs_get_error_handler (g, &cb_data);
guestfs_set_error_handler (g2, cb, cb_data);
r = guestfs_get_verbose (g);
if (r >= 0)
guestfs_set_verbose (g2, r);
r = guestfs_get_trace (g);
if (r >= 0)
guestfs_set_trace (g2, r);
r = guestfs_get_autosync (g);
if (r >= 0)
guestfs_set_autosync (g2, r);
p = guestfs_get_path (g);
if (p)
guestfs_set_path (g2, p);
r = guestfs_get_pgroup (g);
if (r >= 0)
guestfs_set_pgroup (g2, r);
if (progress_bars)
guestfs_set_event_callback (g2, progress_callback,
GUESTFS_EVENT_PROGRESS, 0, NULL);
/* Close the original handle. */
guestfs_close (g);
g = g2;
/* We don't bother copying event handlers over to the new handle,
* but we have to reset the list because they were registered
* against the old handle.
*/
free_event_handlers ();
init_event_handlers ();
return 0;
}
