/*
** jls
** The Sleuth Kit 
**
** $Date: 2007/03/13 20:05:38 $
**
** Brian Carrier [carrier@sleuthkit.org]
** Copyright (c) 2006 Brian Carrier, Basis Technology.  All Rights reserved
** Copyright (c) 2004-2005 Brian Carrier.  All rights reserved
**
**
** This software is distributed under the Common Public License 1.0
**
*/
#include <locale.h>
#include "fs_tools.h"

static TSK_TCHAR *progname;

/* usage - explain and terminate */
static void
usage()
{
    TFPRINTF(stderr,
        _TSK_T
        ("usage: %s [-f fstype] [-i imgtype] [-o imgoffset] [-vV] image [inode]\n"),
        progname);
    tsk_fprintf(stderr,
        "\t-i imgtype: The format of the image file (use '-i list' for supported types)\n");
    tsk_fprintf(stderr,
        "\t-f fstype: File system type (use '-f list' for supported types)\n");
    tsk_fprintf(stderr,
        "\t-o imgoffset: The offset of the file system in the image (in sectors)\n");
    tsk_fprintf(stderr, "\t-v: verbose output to stderr\n");
    tsk_fprintf(stderr, "\t-V: print version\n");
    exit(1);
}


int
MAIN(int argc, TSK_TCHAR ** argv)
{
    INUM_T inum;
    int ch;
    TSK_TCHAR *fstype = NULL;
    TSK_TCHAR *imgtype = NULL;
    TSK_FS_INFO *fs;
    TSK_IMG_INFO *img;
    SSIZE_T imgoff = 0;

    progname = argv[0];
    setlocale(LC_ALL, "");

    while ((ch = getopt(argc, argv, _TSK_T("f:i:o:vV"))) > 0) {
        switch (ch) {
        case _TSK_T('?'):
        default:
            TFPRINTF(stderr, _TSK_T("Invalid argument: %s\n"),
                argv[optind]);
            usage();
        case _TSK_T('f'):
            fstype = optarg;
            if (TSTRCMP(fstype, _TSK_T("list")) == 0) {
                tsk_fs_print_types(stderr);
                exit(1);
            }
            break;
        case _TSK_T('i'):
            imgtype = optarg;
            if (TSTRCMP(imgtype, _TSK_T("list")) == 0) {
                tsk_img_print_types(stderr);
                exit(1);
            }
            break;
        case _TSK_T('o'):
            if ((imgoff = tsk_parse_offset(optarg)) == -1) {
                tsk_error_print(stderr);
                exit(1);
            }
            break;
        case _TSK_T('v'):
            tsk_verbose++;
            break;
        case _TSK_T('V'):
            tsk_print_version(stdout);
            exit(0);
        }
    }

    /* We need at least one more argument */
    if (optind >= argc) {
        tsk_fprintf(stderr, "Missing image name and/or address\n");
        usage();
    }


    /* open image - there is an optional inode address at the end of args 
     *
     * Check the final argument and see if it is a number
     */
    if (tsk_parse_inum(argv[argc - 1], &inum, NULL, NULL, NULL)) {
        /* Not an inode at the end */
        if ((img =
                tsk_img_open(imgtype, argc - optind,
                    (const TSK_TCHAR **) &argv[optind])) == NULL) {
            tsk_error_print(stderr);
            exit(1);
        }

        if ((fs = tsk_fs_open(img, imgoff, fstype)) == NULL) {
            tsk_error_print(stderr);
            if (tsk_errno == TSK_ERR_FS_UNSUPTYPE)
                tsk_fs_print_types(stderr);
            img->close(img);
            exit(1);
        }

        inum = fs->journ_inum;
    }
    else {
        if ((img =
                tsk_img_open(imgtype, argc - optind - 1,
                    (const TSK_TCHAR **) &argv[optind])) == NULL) {
            tsk_error_print(stderr);
            exit(1);
        }

        if ((fs = tsk_fs_open(img, imgoff, fstype)) == NULL) {
            tsk_error_print(stderr);
            if (tsk_errno == TSK_ERR_FS_UNSUPTYPE)
                tsk_fs_print_types(stderr);
            img->close(img);
            exit(1);
        }
    }

    if (fs->jopen == NULL) {
        tsk_fprintf(stderr,
            "Journal support does not exist for this file system\n");
        fs->close(fs);
        img->close(img);
        exit(1);
    }

    if (inum > fs->last_inum) {
        tsk_fprintf(stderr,
            "Inode value is too large for image (%" PRIuINUM ")\n",
            fs->last_inum);
        fs->close(fs);
        img->close(img);
        exit(1);
    }

    if (inum < fs->first_inum) {
        tsk_fprintf(stderr,
            "Inode value is too small for image (%" PRIuINUM ")\n",
            fs->first_inum);
        fs->close(fs);
        img->close(img);
        exit(1);
    }

    if (fs->jopen(fs, inum)) {
        tsk_error_print(stderr);
        fs->close(fs);
        img->close(img);
        exit(1);
    }
    if (fs->jentry_walk(fs, 0, 0, NULL)) {
        tsk_error_print(stderr);
        fs->close(fs);
        img->close(img);
        exit(1);
    }

    fs->close(fs);
    img->close(img);
    exit(0);
}