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813 lines
20 KiB
813 lines
20 KiB
/**
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* ntfstruncate - Part of the Linux-NTFS project.
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*
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* Copyright (c) 2002-2005 Anton Altaparmakov
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*
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* This utility will truncate a specified attribute belonging to a
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* specified inode, i.e. file or directory, to a specified length.
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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 (in the main directory of the Linux-NTFS source
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* in the file COPYING); if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "config.h"
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#ifdef HAVE_STDLIB_H
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# include <stdlib.h>
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#endif
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#ifdef HAVE_STDIO_H
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# include <stdio.h>
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#endif
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#ifdef HAVE_STDARG_H
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# include <stdarg.h>
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#endif
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#ifdef HAVE_STRING_H
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# include <string.h>
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#endif
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#ifdef HAVE_ERRNO_H
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# include <errno.h>
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#endif
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#ifdef HAVE_TIME_H
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#include <time.h>
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#endif
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#ifdef HAVE_GETOPT_H
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# include <getopt.h>
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#else
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extern char *optarg;
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extern int optind;
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#endif
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#ifdef HAVE_LIMITS_H
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#include <limits.h>
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#endif
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#ifndef LLONG_MAX
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# define LLONG_MAX 9223372036854775807LL
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#endif
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#include "types.h"
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#include "attrib.h"
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#include "inode.h"
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#include "layout.h"
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#include "volume.h"
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#include "utils.h"
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#include "attrdef.h"
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/* #include "version.h" */
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#include "logging.h"
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const char *EXEC_NAME = "ntfstruncate";
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/* Need these global so ntfstruncate_exit can access them. */
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BOOL success = FALSE;
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char *dev_name;
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s64 inode;
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ATTR_TYPES attr_type;
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ntfschar *attr_name = NULL;
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u32 attr_name_len;
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s64 new_len;
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ntfs_volume *vol;
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ntfs_inode *ni;
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ntfs_attr *na = NULL;
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ATTR_DEF *attr_defs;
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struct {
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/* -h, print usage and exit. */
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int no_action; /* -n, do not write to device, only display
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what would be done. */
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int quiet; /* -q, quiet execution. */
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int verbose; /* -v, verbose execution, given twice, really
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verbose execution (debug mode). */
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int force; /* -f, force truncation. */
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/* -V, print version and exit. */
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} opts;
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/**
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* err_exit - error output and terminate; ignores quiet (-q)
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*/
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__attribute__((noreturn))
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__attribute__((format(printf, 1, 2)))
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static void err_exit(const char *fmt, ...)
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{
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va_list ap;
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fprintf(stderr, "ERROR: ");
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va_start(ap, fmt);
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vfprintf(stderr, fmt, ap);
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va_end(ap);
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fprintf(stderr, "Aborting...\n");
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exit(1);
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}
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/**
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* copyright - print copyright statements
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*/
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static void copyright(void)
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{
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fprintf(stderr, "Copyright (c) 2002-2005 Anton Altaparmakov\n"
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"Copyright (c) 2003 Richard Russon\n"
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"Truncate a specified attribute of a specified "
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"inode.\n");
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}
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/**
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* license - print license statement
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*/
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static void license(void)
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{
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fprintf(stderr, "%s", ntfs_gpl);
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}
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/**
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* usage - print a list of the parameters to the program
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*/
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__attribute__((noreturn))
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static void usage(int ret)
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{
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copyright();
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fprintf(stderr, "Usage: %s [options] device inode [attr-type "
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"[attr-name]] new-length\n"
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" If attr-type is not specified, 0x80 (i.e. $DATA) "
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"is assumed.\n"
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" If attr-name is not specified, an unnamed "
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"attribute is assumed.\n"
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" -n Do not write to disk\n"
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" -f Force execution despite errors\n"
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" -q Quiet execution\n"
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" -v Verbose execution\n"
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" -vv Very verbose execution\n"
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" -V Display version information\n"
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" -l Display licensing information\n"
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" -h Display this help\n", EXEC_NAME);
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fprintf(stderr, "%s%s", ntfs_bugs, ntfs_home);
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exit(ret);
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}
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/**
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* parse_options
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*/
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static void parse_options(int argc, char *argv[])
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{
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long long ll;
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char *s, *s2;
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int c;
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if (argc && *argv)
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EXEC_NAME = *argv;
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fprintf(stderr, "%s v%s (libntfs-3g)\n", EXEC_NAME, VERSION);
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while ((c = getopt(argc, argv, "fh?nqvVl")) != EOF)
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switch (c) {
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case 'f':
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opts.force = 1;
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break;
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case 'n':
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opts.no_action = 1;
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break;
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case 'q':
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opts.quiet = 1;
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ntfs_log_clear_levels(NTFS_LOG_LEVEL_QUIET);
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break;
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case 'v':
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opts.verbose++;
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ntfs_log_set_levels(NTFS_LOG_LEVEL_VERBOSE);
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break;
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case 'V':
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/* Version number already printed, so just exit. */
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exit(0);
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case 'l':
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copyright();
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license();
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exit(0);
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case 'h':
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usage(0);
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case '?':
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default:
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usage(1);
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}
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if (optind == argc)
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usage(1);
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if (opts.verbose > 1)
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ntfs_log_set_levels(NTFS_LOG_LEVEL_DEBUG | NTFS_LOG_LEVEL_TRACE |
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NTFS_LOG_LEVEL_VERBOSE | NTFS_LOG_LEVEL_QUIET);
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/* Get the device. */
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dev_name = argv[optind++];
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ntfs_log_verbose("device name = %s\n", dev_name);
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if (optind == argc)
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usage(1);
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/* Get the inode. */
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ll = strtoll(argv[optind++], &s, 0);
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if (*s || !ll || (ll >= LLONG_MAX && errno == ERANGE))
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err_exit("Invalid inode number: %s\n", argv[optind - 1]);
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inode = ll;
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ntfs_log_verbose("inode = %lli\n", (long long)inode);
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if (optind == argc)
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usage(1);
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/* Get the attribute type, if specified. */
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s = argv[optind++];
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if (optind == argc) {
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attr_type = AT_DATA;
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attr_name = AT_UNNAMED;
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attr_name_len = 0;
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} else {
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unsigned long ul;
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ul = strtoul(s, &s2, 0);
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if (*s2 || !ul || (ul >= ULONG_MAX && errno == ERANGE))
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err_exit("Invalid attribute type %s: %s\n", s,
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strerror(errno));
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attr_type = cpu_to_le32(ul);
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/* Get the attribute name, if specified. */
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s = argv[optind++];
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if (optind != argc) {
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/* Convert the string to little endian Unicode. */
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attr_name_len = ntfs_mbstoucs(s, &attr_name);
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if ((int)attr_name_len < 0)
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err_exit("Invalid attribute name \"%s\": %s\n",
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s, strerror(errno));
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/* Keep hold of the original string. */
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s2 = s;
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s = argv[optind++];
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if (optind != argc)
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usage(1);
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} else {
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attr_name = AT_UNNAMED;
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attr_name_len = 0;
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}
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}
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ntfs_log_verbose("attribute type = 0x%x\n", (unsigned int)le32_to_cpu(attr_type));
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if (attr_name == AT_UNNAMED)
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ntfs_log_verbose("attribute name = \"\" (UNNAMED)\n");
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else
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ntfs_log_verbose("attribute name = \"%s\" (length %u Unicode "
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"characters)\n", s2,
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(unsigned int)attr_name_len);
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/* Get the new length. */
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ll = strtoll(s, &s2, 0);
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if (*s2 || ll < 0 || (ll >= LLONG_MAX && errno == ERANGE))
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err_exit("Invalid new length: %s\n", s);
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new_len = ll;
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ntfs_log_verbose("new length = %lli\n", (long long)new_len);
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}
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/**
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* ucstos - convert unicode-character string to ASCII
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* @dest: points to buffer to receive the converted string
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* @src: points to string to convert
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* @maxlen: size of @dest buffer in bytes
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*
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* Return the number of characters written to @dest, not including the
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* terminating null byte. If a unicode character was encountered which could
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* not be converted -1 is returned.
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*/
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static int ucstos(char *dest, const ntfschar *src, int maxlen)
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{
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u16 u;
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int i;
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/* Need one byte for null terminator. */
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maxlen--;
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for (i = 0; i < maxlen; i++) {
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u = le16_to_cpu(src[i]);
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if (!u)
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break;
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if (u & 0xff00)
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return -1;
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dest[i] = u & 0xff;
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}
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dest[i] = 0;
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return i;
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}
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/**
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* dump_resident_attr_val
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*/
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static void dump_resident_attr_val(ATTR_TYPES type, char *val, u32 val_len)
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{
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const char *don_t_know = "Don't know what to do with this attribute "
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"type yet.";
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const char *skip = "Skipping display of $%s attribute value.\n";
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const char *todo = "This is still work in progress.";
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char *buf;
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int i, j;
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VOLUME_FLAGS flags;
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u32 u;
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switch (type) {
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case AT_STANDARD_INFORMATION:
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// TODO
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printf("%s\n", todo);
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return;
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case AT_ATTRIBUTE_LIST:
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// TODO
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printf("%s\n", todo);
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return;
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case AT_FILE_NAME:
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// TODO
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printf("%s\n", todo);
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return;
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case AT_OBJECT_ID:
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// TODO
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printf("%s\n", todo);
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return;
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case AT_SECURITY_DESCRIPTOR:
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// TODO
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printf("%s\n", todo);
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return;
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case AT_VOLUME_NAME:
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printf("Volume name length = %u\n", (unsigned int)val_len);
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if (val_len) {
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buf = calloc(1, val_len);
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if (!buf)
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err_exit("Failed to allocate internal buffer: "
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"%s\n", strerror(errno));
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i = ucstos(buf, (ntfschar*)val, val_len);
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if (i == -1)
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printf("Volume name contains non-displayable "
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"Unicode characters.\n");
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printf("Volume name = %s\n", buf);
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free(buf);
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}
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return;
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case AT_VOLUME_INFORMATION:
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#define VOL_INF(x) ((VOLUME_INFORMATION *)(x))
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printf("NTFS version %i.%i\n", VOL_INF(val)->major_ver,
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VOL_INF(val)->minor_ver);
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flags = VOL_INF(val)->flags;
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#undef VOL_INF
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printf("Volume flags = 0x%x: ", le16_to_cpu(flags));
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if (!flags) {
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printf("NONE\n");
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return;
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}
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j = 0;
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if (flags & VOLUME_MODIFIED_BY_CHKDSK) {
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j = 1;
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printf("VOLUME_MODIFIED_BY_CHKDSK");
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}
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if (flags & VOLUME_REPAIR_OBJECT_ID) {
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if (j)
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printf(" | ");
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else
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j = 0;
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printf("VOLUME_REPAIR_OBJECT_ID");
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}
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if (flags & VOLUME_DELETE_USN_UNDERWAY) {
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if (j)
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printf(" | ");
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else
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j = 0;
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printf("VOLUME_DELETE_USN_UNDERWAY");
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}
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if (flags & VOLUME_MOUNTED_ON_NT4) {
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if (j)
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printf(" | ");
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else
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j = 0;
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printf("VOLUME_MOUNTED_ON_NT4");
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}
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if (flags & VOLUME_UPGRADE_ON_MOUNT) {
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if (j)
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printf(" | ");
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else
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j = 0;
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printf("VOLUME_UPGRADE_ON_MOUNT");
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}
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if (flags & VOLUME_RESIZE_LOG_FILE) {
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if (j)
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printf(" | ");
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else
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j = 0;
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printf("VOLUME_RESIZE_LOG_FILE");
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}
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if (flags & VOLUME_IS_DIRTY) {
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if (j)
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printf(" | ");
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else
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j = 0;
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printf("VOLUME_IS_DIRTY");
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}
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printf("\n");
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return;
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case AT_DATA:
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printf(skip, "DATA");
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return;
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case AT_INDEX_ROOT:
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// TODO
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printf("%s\n", todo);
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return;
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case AT_INDEX_ALLOCATION:
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// TODO
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printf("%s\n", todo);
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return;
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case AT_BITMAP:
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printf(skip, "BITMAP");
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return;
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case AT_REPARSE_POINT:
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// TODO
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printf("%s\n", todo);
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return;
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case AT_EA_INFORMATION:
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// TODO
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printf("%s\n", don_t_know);
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return;
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case AT_EA:
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// TODO
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printf("%s\n", don_t_know);
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return;
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case AT_LOGGED_UTILITY_STREAM:
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// TODO
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printf("%s\n", don_t_know);
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return;
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default:
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u = le32_to_cpu(type);
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printf("Cannot display unknown %s defined attribute type 0x%x"
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".\n", u >=
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le32_to_cpu(AT_FIRST_USER_DEFINED_ATTRIBUTE) ?
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"user" : "system", (unsigned int)u);
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}
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}
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/**
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* dump_resident_attr
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*/
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static void dump_resident_attr(ATTR_RECORD *a)
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{
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int i;
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i = le32_to_cpu(a->value_length);
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printf("Attribute value length = %u (0x%x)\n", i, i);
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i = le16_to_cpu(a->value_offset);
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printf("Attribute value offset = %u (0x%x)\n", i, i);
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i = a->resident_flags;
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printf("Resident flags = 0x%x: ", i);
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if (!i)
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printf("NONE\n");
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else if (i & ~RESIDENT_ATTR_IS_INDEXED)
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printf("UNKNOWN FLAG(S)\n");
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else
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printf("RESIDENT_ATTR_IS_INDEXED\n");
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dump_resident_attr_val(a->type, (char*)a + le16_to_cpu(a->value_offset),
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le32_to_cpu(a->value_length));
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}
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/**
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* dump_mapping_pairs_array
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*/
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static void dump_mapping_pairs_array(char *b __attribute__((unused)),
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unsigned int max_len __attribute__((unused)))
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{
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// TODO
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return;
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}
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/**
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* dump_non_resident_attr
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*/
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static void dump_non_resident_attr(ATTR_RECORD *a)
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{
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s64 l;
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int i;
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l = sle64_to_cpu(a->lowest_vcn);
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printf("Lowest VCN = %lli (0x%llx)\n", (long long)l,
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(unsigned long long)l);
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l = sle64_to_cpu(a->highest_vcn);
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printf("Highest VCN = %lli (0x%llx)\n", (long long)l,
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(unsigned long long)l);
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printf("Mapping pairs array offset = 0x%x\n",
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le16_to_cpu(a->mapping_pairs_offset));
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printf("Compression unit = 0x%x: %sCOMPRESSED\n", a->compression_unit,
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a->compression_unit ? "" : "NOT ");
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if (sle64_to_cpu(a->lowest_vcn))
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printf("Attribute is not the first extent. The following "
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"sizes are meaningless:\n");
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l = sle64_to_cpu(a->allocated_size);
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printf("Allocated size = %lli (0x%llx)\n", (long long)l,
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(unsigned long long)l);
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l = sle64_to_cpu(a->data_size);
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printf("Data size = %lli (0x%llx)\n", (long long)l,
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(unsigned long long)l);
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l = sle64_to_cpu(a->initialized_size);
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printf("Initialized size = %lli (0x%llx)\n", (long long)l,
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(unsigned long long)l);
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if (a->flags & ATTR_COMPRESSION_MASK) {
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l = sle64_to_cpu(a->compressed_size);
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printf("Compressed size = %lli (0x%llx)\n", (long long)l,
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(unsigned long long)l);
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}
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i = le16_to_cpu(a->mapping_pairs_offset);
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dump_mapping_pairs_array((char*)a + i, le32_to_cpu(a->length) - i);
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|
}
|
|
|
|
/**
|
|
* dump_attr_record
|
|
*/
|
|
static void dump_attr_record(MFT_RECORD *m, ATTR_RECORD *a)
|
|
{
|
|
unsigned int u;
|
|
char s[0x200];
|
|
int i;
|
|
ATTR_FLAGS flags;
|
|
|
|
printf("-- Beginning dump of attribute record at offset 0x%x. --\n",
|
|
(unsigned)((u8*)a - (u8*)m));
|
|
if (a->type == AT_END) {
|
|
printf("Attribute type = 0x%x ($END)\n",
|
|
(unsigned int)le32_to_cpu(AT_END));
|
|
u = le32_to_cpu(a->length);
|
|
printf("Length of resident part = %u (0x%x)\n", u, u);
|
|
return;
|
|
}
|
|
u = le32_to_cpu(a->type);
|
|
for (i = 0; attr_defs[i].type; i++)
|
|
if (le32_to_cpu(attr_defs[i].type) >= u)
|
|
break;
|
|
if (attr_defs[i].type) {
|
|
// printf("type = 0x%x\n", le32_to_cpu(attr_defs[i].type));
|
|
// { char *p = (char*)attr_defs[i].name;
|
|
// printf("name = %c%c%c%c%c\n", *p, p[1], p[2], p[3], p[4]);
|
|
// }
|
|
if (ucstos(s, attr_defs[i].name, sizeof(s)) == -1) {
|
|
ntfs_log_error("Could not convert Unicode string to single "
|
|
"byte string in current locale.\n");
|
|
strncpy(s, "Error converting Unicode string",
|
|
sizeof(s));
|
|
}
|
|
} else
|
|
strncpy(s, "UNKNOWN_TYPE", sizeof(s));
|
|
printf("Attribute type = 0x%x (%s)\n", u, s);
|
|
u = le32_to_cpu(a->length);
|
|
printf("Length of resident part = %u (0x%x)\n", u, u);
|
|
printf("Attribute is %sresident\n", a->non_resident ? "non-" : "");
|
|
printf("Name length = %u unicode characters\n", a->name_length);
|
|
printf("Name offset = %u (0x%x)\n", le16_to_cpu(a->name_offset),
|
|
le16_to_cpu(a->name_offset));
|
|
flags = a->flags;
|
|
if (a->name_length) {
|
|
if (ucstos(s, (ntfschar*)((char*)a +
|
|
le16_to_cpu(a->name_offset)),
|
|
min((int)sizeof(s),
|
|
a->name_length + 1)) == -1) {
|
|
ntfs_log_error("Could not convert Unicode string to single "
|
|
"byte string in current locale.\n");
|
|
strncpy(s, "Error converting Unicode string",
|
|
sizeof(s));
|
|
|
|
}
|
|
printf("Name = %s\n", s);
|
|
}
|
|
printf("Attribute flags = 0x%x: ", le16_to_cpu(flags));
|
|
if (!flags)
|
|
printf("NONE");
|
|
else {
|
|
int first = TRUE;
|
|
if (flags & ATTR_COMPRESSION_MASK) {
|
|
if (flags & ATTR_IS_COMPRESSED) {
|
|
printf("ATTR_IS_COMPRESSED");
|
|
first = FALSE;
|
|
}
|
|
if ((flags & ATTR_COMPRESSION_MASK) & ~ATTR_IS_COMPRESSED) {
|
|
if (!first)
|
|
printf(" | ");
|
|
else
|
|
first = FALSE;
|
|
printf("ATTR_UNKNOWN_COMPRESSION");
|
|
}
|
|
}
|
|
if (flags & ATTR_IS_ENCRYPTED) {
|
|
if (!first)
|
|
printf(" | ");
|
|
else
|
|
first = FALSE;
|
|
printf("ATTR_IS_ENCRYPTED");
|
|
}
|
|
if (flags & ATTR_IS_SPARSE) {
|
|
if (!first)
|
|
printf(" | ");
|
|
else
|
|
first = FALSE;
|
|
printf("ATTR_IS_SPARSE");
|
|
}
|
|
}
|
|
printf("\n");
|
|
printf("Attribute instance = %u\n", le16_to_cpu(a->instance));
|
|
if (a->non_resident) {
|
|
dump_non_resident_attr(a);
|
|
} else {
|
|
dump_resident_attr(a);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* dump_mft_record
|
|
*/
|
|
static void dump_mft_record(MFT_RECORD *m)
|
|
{
|
|
ATTR_RECORD *a;
|
|
unsigned int u;
|
|
MFT_REF r;
|
|
|
|
printf("-- Beginning dump of mft record. --\n");
|
|
u = le32_to_cpu(m->magic);
|
|
printf("Mft record signature (magic) = %c%c%c%c\n", u & 0xff,
|
|
u >> 8 & 0xff, u >> 16 & 0xff, u >> 24 & 0xff);
|
|
u = le16_to_cpu(m->usa_ofs);
|
|
printf("Update sequence array offset = %u (0x%x)\n", u, u);
|
|
printf("Update sequence array size = %u\n", le16_to_cpu(m->usa_count));
|
|
printf("$LogFile sequence number (lsn) = %llu\n",
|
|
(unsigned long long)sle64_to_cpu(m->lsn));
|
|
printf("Sequence number = %u\n", le16_to_cpu(m->sequence_number));
|
|
printf("Reference (hard link) count = %u\n",
|
|
le16_to_cpu(m->link_count));
|
|
u = le16_to_cpu(m->attrs_offset);
|
|
printf("First attribute offset = %u (0x%x)\n", u, u);
|
|
printf("Flags = %u: ", le16_to_cpu(m->flags));
|
|
if (m->flags & MFT_RECORD_IN_USE)
|
|
printf("MFT_RECORD_IN_USE");
|
|
else
|
|
printf("MFT_RECORD_NOT_IN_USE");
|
|
if (m->flags & MFT_RECORD_IS_DIRECTORY)
|
|
printf(" | MFT_RECORD_IS_DIRECTORY");
|
|
printf("\n");
|
|
u = le32_to_cpu(m->bytes_in_use);
|
|
printf("Bytes in use = %u (0x%x)\n", u, u);
|
|
u = le32_to_cpu(m->bytes_allocated);
|
|
printf("Bytes allocated = %u (0x%x)\n", u, u);
|
|
r = le64_to_cpu(m->base_mft_record);
|
|
printf("Base mft record reference:\n\tMft record number = %llu\n\t"
|
|
"Sequence number = %u\n",
|
|
(unsigned long long)MREF(r), MSEQNO(r));
|
|
printf("Next attribute instance = %u\n",
|
|
le16_to_cpu(m->next_attr_instance));
|
|
a = (ATTR_RECORD*)((char*)m + le16_to_cpu(m->attrs_offset));
|
|
printf("-- Beginning dump of attributes within mft record. --\n");
|
|
while ((char*)a < (char*)m + le32_to_cpu(m->bytes_in_use)) {
|
|
if (a->type == attr_type)
|
|
dump_attr_record(m, a);
|
|
if (a->type == AT_END)
|
|
break;
|
|
a = (ATTR_RECORD*)((char*)a + le32_to_cpu(a->length));
|
|
};
|
|
printf("-- End of attributes. --\n");
|
|
}
|
|
|
|
/**
|
|
* ntfstruncate_exit
|
|
*/
|
|
static void ntfstruncate_exit(void)
|
|
{
|
|
int err;
|
|
|
|
if (success)
|
|
return;
|
|
/* Close the attribute. */
|
|
if (na)
|
|
ntfs_attr_close(na);
|
|
/* Close the inode. */
|
|
if (ni && ntfs_inode_close(ni)) {
|
|
ntfs_log_perror("Warning: Failed to close inode %lli",
|
|
(long long)inode);
|
|
}
|
|
/* Unmount the volume. */
|
|
err = ntfs_umount(vol, 0);
|
|
if (err == -1)
|
|
ntfs_log_perror("Warning: Could not umount %s", dev_name);
|
|
/* Free the attribute name if it exists. */
|
|
ntfs_ucsfree(attr_name);
|
|
}
|
|
|
|
/**
|
|
* main
|
|
*/
|
|
int main(int argc, char **argv)
|
|
{
|
|
unsigned long mnt_flags, ul;
|
|
int err;
|
|
|
|
ntfs_log_set_handler(ntfs_log_handler_outerr);
|
|
|
|
/* Initialize opts to zero / required values. */
|
|
memset(&opts, 0, sizeof(opts));
|
|
|
|
/*
|
|
* Setup a default $AttrDef. FIXME: Should be reading this from the
|
|
* volume itself, at ntfs_mount() time.
|
|
*/
|
|
attr_defs = (ATTR_DEF*)&attrdef_ntfs3x_array;
|
|
|
|
/* Parse command line options. */
|
|
parse_options(argc, argv);
|
|
|
|
utils_set_locale();
|
|
|
|
/* Make sure the file system is not mounted. */
|
|
if (ntfs_check_if_mounted(dev_name, &mnt_flags))
|
|
ntfs_log_perror("Failed to determine whether %s is mounted",
|
|
dev_name);
|
|
else if (mnt_flags & NTFS_MF_MOUNTED) {
|
|
ntfs_log_error("%s is mounted.\n", dev_name);
|
|
if (!opts.force)
|
|
err_exit("Refusing to run!\n");
|
|
fprintf(stderr, "ntfstruncate forced anyway. Hope /etc/mtab "
|
|
"is incorrect.\n");
|
|
}
|
|
|
|
/* Mount the device. */
|
|
if (opts.no_action) {
|
|
ntfs_log_quiet("Running in READ-ONLY mode!\n");
|
|
ul = NTFS_MNT_RDONLY;
|
|
} else
|
|
ul = 0;
|
|
vol = ntfs_mount(dev_name, ul);
|
|
if (!vol)
|
|
err_exit("Failed to mount %s: %s\n", dev_name, strerror(errno));
|
|
|
|
/* Register our exit function which will unlock and close the device. */
|
|
err = atexit(&ntfstruncate_exit);
|
|
if (err == -1) {
|
|
ntfs_log_error("Could not set up exit() function because atexit() "
|
|
"failed: %s Aborting...\n", strerror(errno));
|
|
ntfstruncate_exit();
|
|
exit(1);
|
|
}
|
|
|
|
/* Open the specified inode. */
|
|
ni = ntfs_inode_open(vol, inode);
|
|
if (!ni)
|
|
err_exit("Failed to open inode %lli: %s\n", (long long)inode,
|
|
strerror(errno));
|
|
|
|
/* Open the specified attribute. */
|
|
na = ntfs_attr_open(ni, attr_type, attr_name, attr_name_len);
|
|
if (!na)
|
|
err_exit("Failed to open attribute 0x%x: %s\n",
|
|
(unsigned int)le32_to_cpu(attr_type), strerror(errno));
|
|
|
|
if (!opts.quiet && opts.verbose > 1) {
|
|
ntfs_log_verbose("Dumping mft record before calling "
|
|
"ntfs_attr_truncate():\n");
|
|
dump_mft_record(ni->mrec);
|
|
}
|
|
|
|
/* Truncate the attribute. */
|
|
err = ntfs_attr_truncate(na, new_len);
|
|
if (err)
|
|
err_exit("Failed to truncate attribute 0x%x: %s\n",
|
|
(unsigned int)le32_to_cpu(attr_type), strerror(errno));
|
|
|
|
if (!opts.quiet && opts.verbose > 1) {
|
|
ntfs_log_verbose("Dumping mft record after calling "
|
|
"ntfs_attr_truncate():\n");
|
|
dump_mft_record(ni->mrec);
|
|
}
|
|
|
|
/* Close the attribute. */
|
|
ntfs_attr_close(na);
|
|
na = NULL;
|
|
|
|
/* Close the inode. */
|
|
err = ntfs_inode_close(ni);
|
|
if (err)
|
|
err_exit("Failed to close inode %lli: %s\n", (long long)inode,
|
|
strerror(errno));
|
|
|
|
/* Unmount the volume. */
|
|
err = ntfs_umount(vol, 0);
|
|
if (err == -1)
|
|
ntfs_log_perror("Warning: Failed to umount %s", dev_name);
|
|
|
|
/* Free the attribute name if it exists. */
|
|
ntfs_ucsfree(attr_name);
|
|
|
|
/* Finally, disable our ntfstruncate_exit() handler. */
|
|
success = TRUE;
|
|
|
|
ntfs_log_quiet("ntfstruncate completed successfully. Have a nice day.\n");
|
|
return 0;
|
|
}
|