/*
** istat
** The Sleuth Kit 
**
** $Date: 2007/03/23 15:01:31 $
**
** Display all inode info about a given inode.
**
** Brian Carrier [carrier@sleuthkit.org]
** Copyright (c) 2006 Brian Carrier, Basis Technology.  All Rights reserved
** Copyright (c) 2003-2005 Brian Carrier.  All rights reserved
**
** TASK
** Copyright (c) 2002 Brian Carrier, @stake Inc.  All rights reserved
**
** TCTUTILs
** Copyright (c) 2001 Brian Carrier.  All rights reserved
**
**
** This software is distributed under the Common Public License 1.0
**
*/
#include <locale.h>
#include <time.h>
#include "fs_tools.h"

static TSK_TCHAR *progname;

/* usage - explain and terminate */
static void
usage()
{
    TFPRINTF(stderr,
        _TSK_T
        ("usage: %s [-b num] [-f fstype] [-i imgtype] [-o imgoffset] [-z zone] [-s seconds] [-vV] image inum\n"),
        progname);
    tsk_fprintf(stderr,
        "\t-b num: force the display of NUM address of block pointers\n");
    tsk_fprintf(stderr,
        "\t-z zone: time zone of original machine (i.e. EST5EDT or GMT)\n");
    tsk_fprintf(stderr,
        "\t-s seconds: Time skew of original machine (in seconds)\n");
    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)
{
    TSK_TCHAR *imgtype = NULL;
    TSK_TCHAR *fstype = NULL;
    TSK_IMG_INFO *img;
    TSK_FS_INFO *fs;
    INUM_T inum;
    int ch;
    TSK_TCHAR *cp;
    int32_t sec_skew = 0;
    SSIZE_T imgoff = 0;

    /* When > 0 this is the number of blocks to print, used for -b arg */
    DADDR_T numblock = 0;

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

    while ((ch = getopt(argc, argv, _TSK_T("b:f:i:o:s:vVz:"))) > 0) {
        switch (ch) {
        case _TSK_T('?'):
        default:
            TFPRINTF(stderr, _TSK_T("Invalid argument: %s\n"),
                argv[optind]);
            usage();
        case _TSK_T('b'):
            numblock = TSTRTOULL(optarg, &cp, 0);
            if (*cp || *cp == *optarg || numblock < 1) {
                TFPRINTF(stderr,
                    _TSK_T
                    ("invalid argument: block count must be positive: %s\n"),
                    optarg);
                usage();
            }
            break;
        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('s'):
            sec_skew = TATOI(optarg);
            break;
        case _TSK_T('v'):
            tsk_verbose++;
            break;
        case _TSK_T('V'):
            tsk_print_version(stdout);
            exit(0);
        case _TSK_T('z'):
            {
                TSK_TCHAR envstr[32];
                TSNPRINTF(envstr, 32, _TSK_T("TZ=%s"), optarg);
                if (0 != PUTENV(envstr)) {
                    tsk_fprintf(stderr, "error setting environment");
                    exit(1);
                }
                TZSET();
            }
            break;
        }
    }

    /* We need at least two more argument */
    if (optind + 1 >= argc) {
        tsk_fprintf(stderr, "Missing image name and/or address\n");
        usage();
    }

    /* if we are given the inode in the inode-type-id form, then ignore
     * the other stuff w/out giving an error 
     *
     * This will make scripting easier
     */
    if (tsk_parse_inum(argv[argc - 1], &inum, NULL, NULL, NULL)) {
        TFPRINTF(stderr, _TSK_T("Invalid inode number: %s"),
            argv[argc - 1]);
        usage();
    }

    /*
     * Open the file system.
     */
    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 (inum > fs->last_inum) {
        tsk_fprintf(stderr,
            "Metadata address 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,
            "Metadata address is too small for image (%" PRIuINUM ")\n",
            fs->first_inum);
        fs->close(fs);
        img->close(img);
        exit(1);
    }

    if (fs->istat(fs, stdout, inum, numblock, sec_skew)) {
        tsk_error_print(stderr);
        fs->close(fs);
        img->close(img);
        exit(1);
    }

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