1 /* libguestfs - the guestfsd daemon
2 * Copyright (C) 2009 Red Hat Inc.
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 #include "../src/guestfs_protocol.h"
31 do_tune2fs_l (const char *device)
35 char *p, *pend, *colon;
37 int size = 0, alloc = 0;
39 IS_DEVICE (device, NULL);
41 r = command (&out, &err, "/sbin/tune2fs", "-l", device, NULL);
43 reply_with_error ("tune2fs: %s", err);
52 /* Discard the first line if it contains "tune2fs ...". */
53 if (strncmp (p, "tune2fs ", 8) == 0) {
57 reply_with_error ("tune2fs: truncated output");
63 /* Read the lines and split into "key: value". */
65 pend = strchrnul (p, '\n');
73 colon = strchr (p, ':');
77 do { colon++; } while (*colon && isspace (*colon));
79 if (add_string (&ret, &size, &alloc, p) == -1) {
83 if (strcmp (colon, "<none>") == 0 ||
84 strcmp (colon, "<not available>") == 0 ||
85 strcmp (colon, "(none)") == 0) {
86 if (add_string (&ret, &size, &alloc, "") == -1) {
91 if (add_string (&ret, &size, &alloc, colon) == -1) {
98 if (add_string (&ret, &size, &alloc, p) == -1) {
102 if (add_string (&ret, &size, &alloc, "") == -1) {
113 if (add_string (&ret, &size, &alloc, NULL) == -1)
120 do_set_e2label (const char *device, const char *label)
125 r = command (NULL, &err, "/sbin/e2label", device, label, NULL);
127 reply_with_error ("e2label: %s", err);
137 do_get_e2label (const char *device)
142 r = command (&out, &err, "/sbin/e2label", device, NULL);
144 reply_with_error ("e2label: %s", err);
152 /* Remove any trailing \n from the label. */
154 if (len > 0 && out[len-1] == '\n')
157 return out; /* caller frees */
161 do_set_e2uuid (const char *device, const char *uuid)
166 r = command (NULL, &err, "/sbin/tune2fs", "-U", uuid, device, NULL);
168 reply_with_error ("tune2fs -U: %s", err);
178 do_get_e2uuid (const char *device)
181 char *out, *err, *p, *q;
183 /* It's not so straightforward to get the volume UUID. We have
184 * to use tune2fs -l and then look for a particular string in
188 r = command (&out, &err, "/sbin/tune2fs", "-l", device, NULL);
190 reply_with_error ("tune2fs -l: %s", err);
198 /* Look for /\nFilesystem UUID:\s+/ in the output. */
199 p = strstr (out, "\nFilesystem UUID:");
201 reply_with_error ("no Filesystem UUID in the output of tune2fs -l");
207 while (*p && isspace (*p))
210 reply_with_error ("malformed Filesystem UUID in the output of tune2fs -l");
215 /* Now 'p' hopefully points to the start of the UUID. */
217 while (*q && (isxdigit (*q) || *q == '-'))
220 reply_with_error ("malformed Filesystem UUID in the output of tune2fs -l");
229 reply_with_perror ("strdup");
235 return p; /* caller frees */
239 do_resize2fs (const char *device)
244 IS_DEVICE (device, -1);
246 r = command (NULL, &err, "/sbin/resize2fs", device, NULL);
248 reply_with_error ("resize2fs: %s", err);
258 do_e2fsck_f (const char *device)
263 IS_DEVICE (device, -1);
265 r = command (NULL, &err, "/sbin/e2fsck", "-p", "-f", device, NULL);
267 reply_with_error ("e2fsck: %s", err);