char* lfn_get ( DIR_ENT * de )
Definition at line 353 of file lfn.c.
Referenced by add_file().
{
    char *lfn;
    __u8 sum;
    int i;

    if (de->attr == VFAT_LN_ATTR)
    die("lfn_get called with LFN directory entry");

#if 0
    if (de->lcase)
    VfatPrint( "lcase=%02x\n",de->lcase );
#endif

    if (lfn_slot == -1)
    /* no long name for this file */
    return NULL;

    if (lfn_slot != 0) {
    /* The long name isn't finished yet. */
    /* Causes: 1) LFN slot overwritten by non-VFAT aware tool */
    /* Fixes: 1) delete LFN 2) move overwriting entry to somewhere else
     * and let user enter missing part of LFN (hard to do :-()
     * 3) renumber entries and truncate name */
    char *long_name = CNV_PARTS_SO_FAR();
    char *short_name = file_name(de->name);
    VfatPrint( "Unfinished long file name \"%s\".\n"
        "  (Start may have been overwritten by %s)\n",
        long_name, short_name );
    vffree( long_name );
    if (FsCheckFlags & FSCHECK_INTERACTIVE) {
        VfatPrint( "1: Delete LFN\n2: Leave it as it is.\n"
            "3: Fix numbering (truncates long name and attaches "
            "it to short name %s)\n", short_name );
    }
    else VfatPrint( "  Not auto-correcting this.\n" );
    if (FsCheckFlags & FSCHECK_INTERACTIVE) {
        switch( get_key( "123", "?" )) {
          case '1':
        clear_lfn_slots( 0, lfn_parts-1 );
        lfn_reset();
        return NULL;
          case '2':
        lfn_reset();
        return NULL;
          case '3':
        for( i = 0; i < lfn_parts; ++i ) {
            __u8 id = (lfn_parts-i) | (i==0 ? LFN_ID_START : 0);
            fs_write( lfn_offsets[i]+offsetof(LFN_ENT,id),
                  sizeof(id), &id );
        }
        memmove( lfn_unicode, lfn_unicode+lfn_slot*CHARS_PER_LFN*2,
             lfn_parts*CHARS_PER_LFN*2 );
        break;
        }
    }
    }

    for (sum = 0, i = 0; i < 8; i++)
    sum = (((sum&1) << 7) | ((sum&0xfe) >> 1)) + de->name[i];

    for (i = 0; i < 3; i++)
    sum = (((sum&1) << 7) | ((sum&0xfe) >> 1)) + de->ext[i];

    if (sum != lfn_checksum) {
    /* checksum doesn't match, long name doesn't apply to this alias */
    /* Causes: 1) alias renamed */
    /* Fixes: 1) Fix checksum in LFN entries */
    char *long_name = CNV_PARTS_SO_FAR();
    char *short_name = file_name(de->name);
    VfatPrint( "Wrong checksum for long file name \"%s\".\n"
        "  (Short name %s may have changed without updating the long name)\n",
        long_name, short_name );
    vffree( long_name );
    if (FsCheckFlags & FSCHECK_INTERACTIVE) {
        VfatPrint( "1: Delete LFN\n2: Leave it as it is.\n"
            "3: Fix checksum (attaches to short name %s)\n",
            short_name );
    }
    else VfatPrint( "  Not auto-correcting this.\n" );
    if (FsCheckFlags & FSCHECK_INTERACTIVE) {
        switch( get_key( "123", "?" )) {
          case '1':
        clear_lfn_slots( 0, lfn_parts-1 );
        lfn_reset();
        return NULL;
          case '2':
        lfn_reset();
        return NULL;
          case '3':
        for( i = 0; i < lfn_parts; ++i ) {
            fs_write( lfn_offsets[i]+offsetof(LFN_ENT,alias_checksum),
                  sizeof(sum), &sum );
        }
        break;
        }
    }
    }

    lfn = cnv_unicode( lfn_unicode, UNTIL_0, 1 );
    lfn_reset();
    return( lfn );
}
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