mirror of
https://github.com/libguestfs/libguestfs.git
synced 2026-03-21 22:53:37 +00:00
381c8b68c4
GUESTFSD_EXT_CMD was used by OpenSUSE to track which external commands are run by the daemon and package those commands into the appliance. It is no longer used by recent SUSE builds, so remove it. Thanks: Pino Toscano, Olaf Hering.
142 lines
3.3 KiB
C
142 lines
3.3 KiB
C
/* libguestfs - the guestfsd daemon
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* Copyright (C) 2009 Red Hat Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include <config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "c-ctype.h"
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#include "ignore-value.h"
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#include "guestfs_protocol.h"
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#include "daemon.h"
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#include "actions.h"
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#include "optgroups.h"
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int
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do_internal_feature_available (const char *group)
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{
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size_t i;
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for (i = 0; optgroups[i].group != NULL; ++i) {
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if (STREQ (group, optgroups[i].group)) {
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const int av = optgroups[i].available ();
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return av ? 0 : 1;
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}
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}
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/* Unknown group */
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return 2;
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}
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char **
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do_available_all_groups (void)
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{
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size_t i;
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CLEANUP_FREE_STRINGSBUF DECLARE_STRINGSBUF (groups);
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for (i = 0; optgroups[i].group != NULL; ++i) {
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if (add_string (&groups, optgroups[i].group) == -1)
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return NULL;
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}
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if (end_stringsbuf (&groups) == -1)
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return NULL;
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return take_stringsbuf (&groups); /* caller frees */
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}
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/* Search for filesystem in /proc/filesystems, ignoring "nodev". */
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static int
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test_proc_filesystems (const char *filesystem)
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{
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CLEANUP_FREE char *regex = NULL;
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CLEANUP_FREE char *err = NULL;
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int r;
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if (asprintf (®ex, "^[[:space:]]*%s$", filesystem) == -1) {
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perror ("asprintf");
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return -1;
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}
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r = commandr (NULL, &err, "grep", regex, "/proc/filesystems", NULL);
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if (r == -1 || r >= 2) {
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fprintf (stderr, "grep /proc/filesystems: %s", err);
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return -1;
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}
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return r == 0;
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}
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/* Do modprobe, ignore any errors. */
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static void
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modprobe (const char *module)
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{
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ignore_value (command (NULL, NULL, "modprobe", module, NULL));
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}
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/* Internal function for testing if a filesystem is available. Note
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* this must not call reply_with_error functions.
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*/
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int
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filesystem_available (const char *filesystem)
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{
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int r;
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r = test_proc_filesystems (filesystem);
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if (r == -1 || r > 0)
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return r;
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/* Not found: try to modprobe the module, then test again. */
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if (optgroup_linuxmodules_available ()) {
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modprobe (filesystem);
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r = test_proc_filesystems (filesystem);
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if (r == -1)
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return -1;
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}
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return r;
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}
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int
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do_filesystem_available (const char *filesystem)
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{
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size_t i;
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const size_t len = strlen (filesystem);
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int r;
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for (i = 0; i < len; ++i) {
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if (!c_isalnum (filesystem[i]) && filesystem[i] != '_') {
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reply_with_error ("filesystem name contains non-alphanumeric characters");
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return -1;
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}
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}
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r = filesystem_available (filesystem);
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if (r == -1) {
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reply_with_error ("error testing for filesystem availability; "
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"enable verbose mode and look at preceding output");
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return -1;
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}
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return r;
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}
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