/*
** ffind  (file find)
** The Sleuth Kit 
**
** $Date: 2007/04/04 18:18:53 $
**
** Find the file that uses the specified inode (including deleted files)
** 
** 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 "fs_tools.h"

static TSK_TCHAR *progname;

void
usage()
{
    TFPRINTF(stderr,
        _TSK_T
        ("usage: %s [-aduvV] [-f fstype] [-i imgtype] [-o imgoffset] image [images] inode\n"),
        progname);
    tsk_fprintf(stderr, "\t-a: Find all occurrences\n");
    tsk_fprintf(stderr, "\t-d: Find deleted entries ONLY\n");
    tsk_fprintf(stderr, "\t-u: Find undeleted entries ONLY\n");
    tsk_fprintf(stderr,
        "\t-f fstype: Image file system type (use '-f list' for supported types)\n");
    tsk_fprintf(stderr,
        "\t-i imgtype: The format of the image file (use '-i 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 *fstype = NULL;
    TSK_TCHAR *imgtype = NULL;
    int flags = TSK_FS_DENT_FLAG_RECURSE;
    int ch;
    TSK_FS_INFO *fs;
    extern int optind;
    uint32_t type;
    uint16_t id;
    int id_used;
    TSK_IMG_INFO *img;
    uint8_t localflags = 0;
    INUM_T inode;
    SSIZE_T imgoff = 0;

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

    while ((ch = getopt(argc, argv, _TSK_T("adf:i:o:uvV"))) > 0) {
        switch (ch) {
        case _TSK_T('a'):
            localflags |= TSK_FS_FFIND_ALL;
            break;
        case _TSK_T('d'):
            flags |= TSK_FS_DENT_FLAG_UNALLOC;
            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('u'):
            flags |= TSK_FS_DENT_FLAG_ALLOC;
            break;
        case _TSK_T('v'):
            tsk_verbose++;
            break;
        case _TSK_T('V'):
            tsk_print_version(stdout);
            exit(0);
        case _TSK_T('?'):
        default:
            TFPRINTF(stderr, _TSK_T("Invalid argument: %s\n"),
                argv[optind]);
            usage();
        }
    }

    /* if the user did not specify either of the alloc/unalloc flags
     ** then show them all
     */
    if ((!(flags & TSK_FS_DENT_FLAG_ALLOC))
        && (!(flags & TSK_FS_DENT_FLAG_UNALLOC)))
        flags |= (TSK_FS_DENT_FLAG_ALLOC | TSK_FS_DENT_FLAG_UNALLOC);


    if (optind + 1 >= argc) {
        tsk_fprintf(stderr, "Missing image name and/or address\n");
        usage();
    }


    /* Get the inode */
    if (tsk_parse_inum(argv[argc - 1], &inode, &type, &id, &id_used)) {
        TFPRINTF(stderr, _TSK_T("Invalid inode: %s\n"), argv[argc - 1]);
        usage();
    }
    if (id_used == 0)
        flags |= TSK_FS_FILE_FLAG_NOID;

    /* open image */
    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 (inode < fs->first_inum) {
        tsk_fprintf(stderr,
            "Inode is too small for image (%" PRIuINUM ")\n",
            fs->first_inum);
        exit(1);
    }
    if (inode > fs->last_inum) {
        tsk_fprintf(stderr,
            "Inode is too large for image (%" PRIuINUM ")\n",
            fs->last_inum);
        exit(1);
    }

    if (tsk_fs_ffind(fs, localflags, inode, type, id, flags)) {
        tsk_error_print(stderr);
        fs->close(fs);
        img->close(img);
        exit(1);
    }

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