diff options
| -rw-r--r-- | daemon/tune2fs.c | 119 | ||||
| -rwxr-xr-x | src/generator.ml | 49 |
2 files changed, 168 insertions, 0 deletions
diff --git a/daemon/tune2fs.c b/daemon/tune2fs.c index 742a7d91..99c12f09 100644 --- a/daemon/tune2fs.c +++ b/daemon/tune2fs.c @@ -115,3 +115,122 @@ do_tune2fs_l (const char *device) return ret; } + +int +do_set_e2label (const char *device, const char *label) +{ + int r; + char *err; + + r = command (NULL, &err, "/sbin/e2label", device, label, NULL); + if (r == -1) { + reply_with_error ("e2label: %s", err); + free (err); + return -1; + } + + free (err); + return 0; +} + +char * +do_get_e2label (const char *device) +{ + int r, len; + char *out, *err; + + r = command (&out, &err, "/sbin/e2label", device, NULL); + if (r == -1) { + reply_with_error ("e2label: %s", err); + free (out); + free (err); + return NULL; + } + + free (err); + + /* Remove any trailing \n from the label. */ + len = strlen (out); + if (len > 0 && out[len-1] == '\n') + out[len-1] = '\0'; + + return out; /* caller frees */ +} + +int +do_set_e2uuid (const char *device, const char *uuid) +{ + int r; + char *err; + + r = command (NULL, &err, "/sbin/tune2fs", "-U", uuid, device, NULL); + if (r == -1) { + reply_with_error ("tune2fs -U: %s", err); + free (err); + return -1; + } + + free (err); + return 0; +} + +char * +do_get_e2uuid (const char *device) +{ + int r; + char *out, *err, *p, *q; + + /* It's not so straightforward to get the volume UUID. We have + * to use tune2fs -l and then look for a particular string in + * the output. + */ + + r = command (&out, &err, "/sbin/tune2fs", "-l", device, NULL); + if (r == -1) { + reply_with_error ("tune2fs -l: %s", err); + free (out); + free (err); + return NULL; + } + + free (err); + + /* Look for /\nFilesystem UUID:\s+/ in the output. */ + p = strstr (out, "\nFilesystem UUID:"); + if (p == NULL) { + reply_with_error ("no Filesystem UUID in the output of tune2fs -l"); + free (out); + return NULL; + } + + p += 17; + while (*p && isspace (*p)) + p++; + if (!*p) { + reply_with_error ("malformed Filesystem UUID in the output of tune2fs -l"); + free (out); + return NULL; + } + + /* Now 'p' hopefully points to the start of the UUID. */ + q = p; + while (*q && (isxdigit (*q) || *q == '-')) + q++; + if (!*q) { + reply_with_error ("malformed Filesystem UUID in the output of tune2fs -l"); + free (out); + return NULL; + } + + *q = '\0'; + + p = strdup (p); + if (!p) { + reply_with_perror ("strdup"); + free (out); + return NULL; + } + + free (out); + return p; /* caller frees */ +} diff --git a/src/generator.ml b/src/generator.ml index 5e2b4d4b..a7093768 100755 --- a/src/generator.ml +++ b/src/generator.ml @@ -1565,6 +1565,55 @@ The implementation uses the C<pvremove> command which refuses to wipe physical volumes that contain any volume groups, so you have to remove those first."); + ("set_e2label", (RErr, [String "device"; String "label"]), 80, [], + [InitBasicFS, TestOutput ( + [["set_e2label"; "/dev/sda1"; "testlabel"]; + ["get_e2label"; "/dev/sda1"]], "testlabel")], + "set the ext2/3/4 filesystem label", + "\ +This sets the ext2/3/4 filesystem label of the filesystem on +C<device> to C<label>. Filesystem labels are limited to +16 characters. + +You can use either C<guestfs_tune2fs_l> or C<guestfs_get_e2label> +to return the existing label on a filesystem."); + + ("get_e2label", (RString "label", [String "device"]), 81, [], + [], + "get the ext2/3/4 filesystem label", + "\ +This returns the ext2/3/4 filesystem label of the filesystem on +C<device>."); + + ("set_e2uuid", (RErr, [String "device"; String "uuid"]), 82, [], + [InitBasicFS, TestOutput ( + [["set_e2uuid"; "/dev/sda1"; "a3a61220-882b-4f61-89f4-cf24dcc7297d"]; + ["get_e2uuid"; "/dev/sda1"]], "a3a61220-882b-4f61-89f4-cf24dcc7297d"); + InitBasicFS, TestOutput ( + [["set_e2uuid"; "/dev/sda1"; "clear"]; + ["get_e2uuid"; "/dev/sda1"]], ""); + (* We can't predict what UUIDs will be, so just check the commands run. *) + InitBasicFS, TestRun ( + [["set_e2uuid"; "/dev/sda1"; "random"]]); + InitBasicFS, TestRun ( + [["set_e2uuid"; "/dev/sda1"; "time"]])], + "set the ext2/3/4 filesystem UUID", + "\ +This sets the ext2/3/4 filesystem UUID of the filesystem on +C<device> to C<uuid>. The format of the UUID and alternatives +such as C<clear>, C<random> and C<time> are described in the +L<tune2fs(8)> manpage. + +You can use either C<guestfs_tune2fs_l> or C<guestfs_get_e2uuid> +to return the existing UUID of a filesystem."); + + ("get_e2uuid", (RString "uuid", [String "device"]), 83, [], + [], + "get the ext2/3/4 filesystem UUID", + "\ +This returns the ext2/3/4 filesystem UUID of the filesystem on +C<device>."); + ] let all_functions = non_daemon_functions @ daemon_functions |