1 /*- 2 * Copyright (c) 2004 Pawel Jakub Dawidek <pjd@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/param.h> 31 #include <sys/systm.h> 32 #include <sys/kernel.h> 33 #include <sys/malloc.h> 34 35 #include <geom/geom.h> 36 #include <geom/label/g_label.h> 37 38 #define G_LABEL_ISO9660_DIR "iso9660" 39 40 #define ISO9660_MAGIC "\x01" "CD001" "\x01\x00" 41 #define VOLUME_LEN 32 42 43 44 static void 45 g_label_iso9660_taste(struct g_consumer *cp, char *label, size_t size) 46 { 47 struct g_provider *pp; 48 char *sector, *volume; 49 int i, error; 50 51 g_topology_assert_not(); 52 pp = cp->provider; 53 label[0] = '\0'; 54 55 sector = (char *)g_read_data(cp, 0x8000, pp->sectorsize, &error); 56 if (sector == NULL || error != 0) 57 return; 58 if (bcmp(sector, ISO9660_MAGIC, sizeof(ISO9660_MAGIC) - 1) != 0) { 59 g_free(sector); 60 return; 61 } 62 G_LABEL_DEBUG(1, "ISO9660 file system detected on %s.", pp->name); 63 volume = sector + 0x28; 64 bzero(label, size); 65 strlcpy(label, volume, MIN(size, VOLUME_LEN)); 66 g_free(sector); 67 for (i = size - 1; i > 0; i--) { 68 if (label[i] == '\0') 69 continue; 70 else if (label[i] == ' ') 71 label[i] = '\0'; 72 else 73 break; 74 } 75 } 76 77 const struct g_label_desc g_label_iso9660 = { 78 .ld_taste = g_label_iso9660_taste, 79 .ld_dir = G_LABEL_ISO9660_DIR 80 }; 81