1 /* $NetBSD: partutil.c,v 1.4 2009/04/11 06:48:36 lukem Exp $ */ 2 3 /*- 4 * Copyright (c) 2006 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Christos Zoulas. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __RCSID("$NetBSD: partutil.c,v 1.4 2009/04/11 06:48:36 lukem Exp $"); 34 35 #include <sys/types.h> 36 #include <sys/disklabel.h> 37 #include <sys/disk.h> 38 #include <sys/ioctl.h> 39 #include <sys/stat.h> 40 41 #include <disktab.h> 42 #include <fcntl.h> 43 #include <util.h> 44 #include <unistd.h> 45 #include <err.h> 46 #include <string.h> 47 #include <errno.h> 48 49 #include "partutil.h" 50 51 static void 52 label2geom(struct disk_geom *geo, const struct disklabel *lp) 53 { 54 geo->dg_secperunit = lp->d_secperunit; 55 geo->dg_secsize = lp->d_secsize; 56 geo->dg_nsectors = lp->d_nsectors; 57 geo->dg_ntracks = lp->d_ntracks; 58 geo->dg_ncylinders = lp->d_ncylinders; 59 geo->dg_secpercyl = lp->d_secpercyl; 60 geo->dg_pcylinders = lp->d_ncylinders; 61 geo->dg_sparespertrack = lp->d_sparespertrack; 62 geo->dg_sparespercyl = lp->d_sparespercyl; 63 geo->dg_acylinders = lp->d_acylinders; 64 } 65 66 static void 67 part2wedge(struct dkwedge_info *dkw, const struct disklabel *lp, const char *s) 68 { 69 struct stat sb; 70 const struct partition *pp; 71 int ptn; 72 73 (void)memset(dkw, 0, sizeof(*dkw)); 74 if (stat(s, &sb) == -1) 75 return; 76 77 ptn = strchr(s, '\0')[-1] - 'a'; 78 if ((unsigned)ptn >= lp->d_npartitions || 79 (devminor_t)ptn != DISKPART(sb.st_rdev)) 80 return; 81 82 pp = &lp->d_partitions[ptn]; 83 dkw->dkw_offset = pp->p_offset; 84 dkw->dkw_size = pp->p_size; 85 dkw->dkw_parent[0] = '*'; 86 switch (pp->p_fstype) { 87 default: 88 (void)strcpy(dkw->dkw_ptype, DKW_PTYPE_UNKNOWN); 89 break; 90 case FS_UNUSED: 91 (void)strcpy(dkw->dkw_ptype, DKW_PTYPE_UNUSED); 92 break; 93 case FS_SWAP: 94 (void)strcpy(dkw->dkw_ptype, DKW_PTYPE_SWAP); 95 break; 96 case FS_BSDFFS: 97 (void)strcpy(dkw->dkw_ptype, DKW_PTYPE_FFS); 98 break; 99 case FS_BSDLFS: 100 (void)strcpy(dkw->dkw_ptype, DKW_PTYPE_LFS); 101 break; 102 case FS_EX2FS: 103 (void)strcpy(dkw->dkw_ptype, DKW_PTYPE_EXT2FS); 104 break; 105 case FS_ISO9660: 106 (void)strcpy(dkw->dkw_ptype, DKW_PTYPE_ISO9660); 107 break; 108 case FS_ADOS: 109 (void)strcpy(dkw->dkw_ptype, DKW_PTYPE_AMIGADOS); 110 break; 111 case FS_HFS: 112 (void)strcpy(dkw->dkw_ptype, DKW_PTYPE_APPLEHFS); 113 break; 114 case FS_MSDOS: 115 (void)strcpy(dkw->dkw_ptype, DKW_PTYPE_FAT); 116 break; 117 case FS_FILECORE: 118 (void)strcpy(dkw->dkw_ptype, DKW_PTYPE_FILECORE); 119 break; 120 case FS_APPLEUFS: 121 (void)strcpy(dkw->dkw_ptype, DKW_PTYPE_APPLEUFS); 122 break; 123 case FS_NTFS: 124 (void)strcpy(dkw->dkw_ptype, DKW_PTYPE_NTFS); 125 break; 126 } 127 } 128 129 int 130 getdiskinfo(const char *s, int fd, const char *dt, struct disk_geom *geo, 131 struct dkwedge_info *dkw) 132 { 133 struct disklabel lab; 134 struct disklabel *lp = &lab; 135 char parent[1024]; 136 137 if (dt) { 138 lp = getdiskbyname(dt); 139 if (lp == NULL) 140 errx(1, "%s: unknown disk type", dt); 141 goto part; 142 } 143 144 if (ioctl(fd, DIOCGDINFO, lp) == -1) { 145 if (errno == ENOTTY) { 146 int pfd; 147 if (ioctl(fd, DIOCGWEDGEINFO, dkw) == -1) { 148 warn("ioctl (DIOCGWEDGEINFO)"); 149 goto bad; 150 } 151 pfd = opendisk(dkw->dkw_parent, O_RDONLY, 152 parent, sizeof(parent), 0); 153 if (pfd == -1) { 154 warn("Cannot open `%s'", dkw->dkw_parent); 155 goto bad; 156 } 157 if (ioctl(pfd, DIOCGDINFO, lp) != -1) { 158 (void)close(pfd); 159 goto label; 160 } else { 161 int serrno = errno; 162 (void)close(pfd); 163 errno = serrno; 164 } 165 } 166 warn("ioctl (DIOCGDINFO)"); 167 goto bad; 168 } 169 part: 170 part2wedge(dkw, lp, s); 171 label: 172 label2geom(geo, lp); 173 return 0; 174 bad: 175 return -1; 176 } 177