Implemented an option to set a new serial number in ntfslabel
Defined new options --new-serial and --new-half-serial to set a new serial number (either the given one or a random one) to a file system. Useful for mounting the original and the cloned file system at the same time.edge.strict_endians
Jean-Pierre André
parent
54f96e4af1
commit
66d30c86b3
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@ -12,10 +12,12 @@ ntfslabel \- display/change the label on an ntfs file system
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.B ntfslabel
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will display or change the file system label on the ntfs file system located on
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.IR device .
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It can also change the serial number of the
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.IR device .
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.PP
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If the optional argument
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.I new\-label
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is not present,
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is not present, and no option is present,
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.B ntfslabel
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will simply display the current file system label.
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.PP
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@ -57,6 +59,22 @@ volume. Use this option with caution.
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.TP
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\fB\-h\fR, \fB\-\-help\fR
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Show a list of options with a brief description of each one.
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.TP
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\fB\-\-new\-serial\fR[\fI=ssssssssssssssss\fR], or
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.TP
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\fB\-\-new\-half\-serial\fR[\fI=ssssssss\fR]
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Set a new serial number to the device, either the argument value, or a random
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one if no argument is given. The serial number is a 64 bit number,
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represented as a sixteen-digit hexadecimal number, used to identify the
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device during the mounting process. As a consequence, two devices with the
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same serial number cannot be mounted at the same time on the same computer.
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This is not the volume UUID used by Windows to locate files which have been
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moved to another volume.
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The option \-\-new\-half\-serial only changes the upper part of the serial
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number, keeping the lower part which is used by Windows unchanged.
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In this case the optional argument is an eight-digit hexadecimal number.
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.TP
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\fB\-n\fR, \fB\-\-no\-action\fR
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Don't actually write to disk.
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@ -67,7 +85,7 @@ Reduce the amount of output to a minimum.
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\fB\-v\fR, \fB\-\-verbose\fR
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Increase the amount of output that
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.B ntfslabel
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prints.
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prints. The label and the serial number are displayed.
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.TP
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\fB\-V\fR, \fB\-\-version\fR
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Show the version number, copyright and license for
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@ -4,6 +4,7 @@
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* Copyright (c) 2002 Matthew J. Fanto
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* Copyright (c) 2002-2005 Anton Altaparmakov
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* Copyright (c) 2002-2003 Richard Russon
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* Copyright (c) 2012 Jean-Pierre Andre
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*
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* This utility will display/change the label on an NTFS partition.
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*
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@ -43,12 +44,16 @@
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#ifdef HAVE_GETOPT_H
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#include <getopt.h>
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include "debug.h"
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#include "mft.h"
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#include "utils.h"
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/* #include "version.h" */
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#include "logging.h"
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#include "misc.h"
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static const char *EXEC_NAME = "ntfslabel";
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@ -58,6 +63,8 @@ static struct options {
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int quiet; /* Less output */
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int verbose; /* Extra output */
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int force; /* Override common sense */
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int new_serial; /* Change the serial number */
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long long serial; /* Forced serial number value */
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int noaction; /* Do not write to disk */
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} opts;
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@ -76,6 +83,7 @@ static void version(void)
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ntfs_log_info(" 2002 Matthew J. Fanto\n");
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ntfs_log_info(" 2002-2005 Anton Altaparmakov\n");
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ntfs_log_info(" 2002-2003 Richard Russon\n");
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ntfs_log_info(" 2012 Jean-Pierre Andre\n");
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ntfs_log_info("\n%s\n%s%s\n", ntfs_gpl, ntfs_bugs, ntfs_home);
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}
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@ -91,6 +99,8 @@ static void usage(void)
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ntfs_log_info("\nUsage: %s [options] device [label]\n"
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" -n, --no-action Do not write to disk\n"
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" -f, --force Use less caution\n"
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" --new-serial Set a new serial number\n"
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" --new-half-serial Set a partial new serial number\n"
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" -q, --quiet Less output\n"
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" -v, --verbose More output\n"
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" -V, --version Display version information\n"
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@ -110,10 +120,12 @@ static void usage(void)
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*/
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static int parse_options(int argc, char *argv[])
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{
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static const char *sopt = "-fh?nqvV";
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static const char *sopt = "-fh?IinqvV";
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static const struct option lopt[] = {
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{ "force", no_argument, NULL, 'f' },
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{ "help", no_argument, NULL, 'h' },
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{ "new-serial", optional_argument, NULL, 'I' },
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{ "new-half-serial", optional_argument, NULL, 'i' },
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{ "no-action", no_argument, NULL, 'n' },
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{ "quiet", no_argument, NULL, 'q' },
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{ "verbose", no_argument, NULL, 'v' },
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@ -126,6 +138,7 @@ static int parse_options(int argc, char *argv[])
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int ver = 0;
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int help = 0;
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int levels = 0;
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char *endserial;
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opterr = 0; /* We'll handle the errors, thank you. */
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@ -151,6 +164,23 @@ static int parse_options(int argc, char *argv[])
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}
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help++;
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break;
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case 'I' : /* not proposed as a short option letter */
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if (optarg) {
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opts.serial = strtoll(optarg, &endserial, 16);
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if (*endserial)
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ntfs_log_error("Bad hexadecimal serial number.\n");
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}
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opts.new_serial |= 2;
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break;
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case 'i' : /* not proposed as a short option letter */
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if (optarg) {
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opts.serial = strtoll(optarg, &endserial, 16)
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<< 32;
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if (*endserial)
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ntfs_log_error("Bad hexadecimal serial number.\n");
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}
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opts.new_serial |= 1;
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break;
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case 'n':
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opts.noaction++;
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break;
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@ -203,6 +233,106 @@ static int parse_options(int argc, char *argv[])
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return (!err && !help && !ver);
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}
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static int change_serial(ntfs_volume *vol, u64 sector, le64 serial_number,
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NTFS_BOOT_SECTOR *bs, NTFS_BOOT_SECTOR *oldbs)
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{
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int res;
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le64 mask;
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BOOL same;
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res = -1;
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if ((ntfs_pread(vol->dev, sector << vol->sector_size_bits,
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vol->sector_size, bs) == vol->sector_size)) {
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same = TRUE;
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if (!sector)
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/* save the real bootsector */
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memcpy(oldbs, bs, vol->sector_size);
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else
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/* backup bootsector must be similar */
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same = !memcmp(oldbs, bs, vol->sector_size);
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if (same) {
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if (opts.new_serial & 2)
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bs->volume_serial_number = serial_number;
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else {
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mask = const_cpu_to_le64(~0x0ffffffffULL);
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bs->volume_serial_number
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= (serial_number & mask)
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| (bs->volume_serial_number & ~mask);
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}
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if (opts.noaction
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|| (ntfs_pwrite(vol->dev,
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sector << vol->sector_size_bits,
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vol->sector_size, bs) == vol->sector_size)) {
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res = 0;
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}
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} else {
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ntfs_log_info("* Warning : the backup boot sector"
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" does not match (leaving unchanged)\n");
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res = 0;
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}
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}
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return (res);
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}
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static int set_new_serial(ntfs_volume *vol)
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{
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NTFS_BOOT_SECTOR *bs; /* full boot sectors */
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NTFS_BOOT_SECTOR *oldbs; /* full original boot sector */
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le64 serial_number;
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u64 number_of_sectors;
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u64 sn;
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int res;
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res = -1;
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bs = (NTFS_BOOT_SECTOR*)ntfs_malloc(vol->sector_size);
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oldbs = (NTFS_BOOT_SECTOR*)ntfs_malloc(vol->sector_size);
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if (bs && oldbs) {
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if (opts.serial)
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serial_number = cpu_to_le64(opts.serial);
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else {
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/* different values for parallel processes */
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srandom(time((time_t*)NULL) ^ (getpid() << 16));
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sn = ((u64)random() << 32)
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| ((u64)random() & 0xffffffff);
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serial_number = cpu_to_le64(sn);
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}
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if (!change_serial(vol, 0, serial_number, bs, oldbs)) {
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number_of_sectors = le64_to_cpu(bs->number_of_sectors);
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if (!change_serial(vol, number_of_sectors,
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serial_number, bs, oldbs)) {
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ntfs_log_info("New serial number : %016llx\n",
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(long long)le64_to_cpu(
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bs->volume_serial_number));
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res = 0;
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}
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}
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free(bs);
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free(oldbs);
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}
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if (res)
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ntfs_log_info("Error setting a new serial number\n");
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return (res);
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}
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static int print_serial(ntfs_volume *vol)
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{
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NTFS_BOOT_SECTOR *bs; /* full boot sectors */
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int res;
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res = -1;
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bs = (NTFS_BOOT_SECTOR*)ntfs_malloc(vol->sector_size);
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if (bs
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&& (ntfs_pread(vol->dev, 0,
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vol->sector_size, bs) == vol->sector_size)) {
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ntfs_log_info("Serial number : %016llx\n",
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(long long)le64_to_cpu(bs->volume_serial_number));
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res = 0;
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free(bs);
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}
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if (res)
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ntfs_log_info("Error getting the serial number\n");
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return (res);
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}
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/**
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* print_label - display the current label of a mounted ntfs partition.
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@ -223,7 +353,10 @@ static int print_label(ntfs_volume *vol, unsigned long mnt_flags)
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result = 1;
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}
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ntfs_log_info("%s\n", vol->vol_name);
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if (opts.verbose)
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ntfs_log_info("Volume label : %s\n", vol->vol_name);
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else
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ntfs_log_info("%s\n", vol->vol_name);
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return result;
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}
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@ -236,27 +369,12 @@ static int print_label(ntfs_volume *vol, unsigned long mnt_flags)
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*
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* Change the label on the device @dev to @label.
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*/
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static int change_label(ntfs_volume *vol, unsigned long mnt_flags, char *label, BOOL force)
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static int change_label(ntfs_volume *vol, char *label)
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{
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ntfschar *new_label = NULL;
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int label_len;
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int result = 0;
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//XXX significant?
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if (mnt_flags & NTFS_MF_MOUNTED) {
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/* If not the root fs or mounted read/write, refuse change. */
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if (!(mnt_flags & NTFS_MF_ISROOT) ||
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!(mnt_flags & NTFS_MF_READONLY)) {
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if (!force) {
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ntfs_log_error("Refusing to change label on "
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"read-%s mounted device %s.\n",
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mnt_flags & NTFS_MF_READONLY ?
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"only" : "write", opts.device);
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return 1;
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}
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}
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}
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label_len = ntfs_mbstoucs(label, &new_label);
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if (label_len == -1) {
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ntfs_log_perror("Unable to convert label string to Unicode");
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@ -300,7 +418,17 @@ int main(int argc, char **argv)
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utils_set_locale();
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if (!opts.label)
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if ((opts.label || opts.new_serial)
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&& !opts.noaction
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&& !opts.force
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&& !ntfs_check_if_mounted(opts.device, &mnt_flags)
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&& (mnt_flags & NTFS_MF_MOUNTED)) {
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ntfs_log_error("Cannot make changes to a mounted device\n");
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result = 1;
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goto abort;
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}
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if (!opts.label && !opts.new_serial)
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opts.noaction++;
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vol = utils_mount_volume(opts.device,
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@ -309,12 +437,22 @@ int main(int argc, char **argv)
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if (!vol)
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return 1;
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if (opts.new_serial) {
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result = set_new_serial(vol);
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if (result)
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goto unmount;
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} else {
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if (opts.verbose)
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result = print_serial(vol);
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}
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if (opts.label)
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result = change_label(vol, mnt_flags, opts.label, opts.force);
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result = change_label(vol, opts.label);
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else
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result = print_label(vol, mnt_flags);
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unmount :
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ntfs_umount(vol, FALSE);
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abort :
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return result;
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}
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