2 * This file has been modified for the cdrkit suite.
4 * The behaviour and appearence of the program code below can differ to a major
5 * extent from the version distributed by the original author(s).
7 * For details, see Changelog file distributed with the cdrkit package. If you
8 * received this file from another source then ask the distributing person for
9 * a log of modifications.
13 /* @(#)isosize.c 1.9 04/03/02 Copyright 1996, 2001-2004 J. Schilling */
15 * Copyright (c) 1996, 2001-2004 J. Schilling
18 * This program is free software; you can redistribute it and/or modify
19 * it under the terms of the GNU General Public License version 2
20 * as published by the Free Software Foundation.
22 * This program is distributed in the hope that it will be useful,
23 * but WITHOUT ANY WARRANTY; without even the implied warranty of
24 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
25 * GNU General Public License for more details.
27 * You should have received a copy of the GNU General Public License along with
28 * this program; see the file COPYING. If not, write to the Free Software
29 * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
40 #include "wodim.h" /* to verify isosize() prototype */
47 struct iso9660_voldesc vd;
48 struct iso9660_pr_voldesc *vp;
54 * First check if a bad guy tries to call isosize()
55 * with an unappropriate file descriptor.
56 * return -1 in this case.
60 if (fstat(f, &sb) < 0)
62 mode = sb.st_mode & S_IFMT;
63 if (!S_ISREG(mode) && !S_ISBLK(mode) && !S_ISCHR(mode))
66 if (lseek(f, (off_t)(16L * 2048L), SEEK_SET) == -1)
69 vp = (struct iso9660_pr_voldesc *) &vd;
72 read(f, &vd, sizeof (vd)); /* FIXME: check return value */
73 if (GET_UBYTE(vd.vd_type) == VD_PRIMARY)
76 } while (GET_UBYTE(vd.vd_type) != VD_TERM);
78 lseek(f, (off_t)0L, SEEK_SET);
80 if (GET_UBYTE(vd.vd_type) != VD_PRIMARY)
83 isize = (Llong)GET_BINT(vp->vd_volume_space_size);
84 isize *= GET_BSHORT(vp->vd_lbsize);