1 /* $OpenBSD: octeon_installboot.c,v 1.2 2020/07/18 16:42:00 deraadt Exp $ */ 2 3 /* 4 * Copyright (c) 2011 Joel Sing <jsing@openbsd.org> 5 * Copyright (c) 2010 Otto Moerbeek <otto@openbsd.org> 6 * Copyright (c) 2003 Tom Cosgrove <tom.cosgrove@arches-consulting.com> 7 * Copyright (c) 1997 Michael Shalayeff 8 * Copyright (c) 1994 Paul Kranenburg 9 * All rights reserved. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. All advertising materials mentioning features or use of this software 20 * must display the following acknowledgement: 21 * This product includes software developed by Paul Kranenburg. 22 * 4. The name of the author may not be used to endorse or promote products 23 * derived from this software without specific prior written permission 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 26 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 27 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 28 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 29 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 30 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 31 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 32 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 33 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 34 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 35 */ 36 37 #include <sys/param.h> /* DEV_BSIZE */ 38 #include <sys/disklabel.h> 39 #include <sys/dkio.h> 40 #include <sys/ioctl.h> 41 #include <sys/mount.h> 42 #include <sys/stat.h> 43 44 #include <err.h> 45 #include <errno.h> 46 #include <fcntl.h> 47 #include <stdlib.h> 48 #include <stdio.h> 49 #include <string.h> 50 #include <unistd.h> 51 #include <util.h> 52 #include <endian.h> 53 54 #include "installboot.h" 55 56 static void write_filesystem(struct disklabel *, char); 57 static int findmbrfat(int, struct disklabel *); 58 59 void 60 md_init(void) 61 { 62 } 63 64 void 65 md_loadboot(void) 66 { 67 } 68 69 void 70 md_installboot(int devfd, char *dev) 71 { 72 struct disklabel dl; 73 int part; 74 75 /* Get and check disklabel. */ 76 if (ioctl(devfd, DIOCGDINFO, &dl) == -1) 77 err(1, "disklabel: %s", dev); 78 if (dl.d_magic != DISKMAGIC) 79 errx(1, "bad disklabel magic=0x%08x", dl.d_magic); 80 81 /* Warn on unknown disklabel types. */ 82 if (dl.d_type == 0) 83 warnx("disklabel type unknown"); 84 85 part = findmbrfat(devfd, &dl); 86 if (part != -1) { 87 write_filesystem(&dl, (char)part); 88 return; 89 } 90 } 91 92 93 static void 94 write_filesystem(struct disklabel *dl, char part) 95 { 96 static char *fsckfmt = "/sbin/fsck_msdos %s >/dev/null"; 97 static char *newfsfmt ="/sbin/newfs_msdos %s >/dev/null"; 98 struct msdosfs_args args; 99 char cmd[60]; 100 char dst[PATH_MAX]; 101 char *src; 102 size_t mntlen, pathlen, srclen; 103 int rslt; 104 105 src = NULL; 106 107 /* Create directory for temporary mount point. */ 108 strlcpy(dst, "/tmp/installboot.XXXXXXXXXX", sizeof(dst)); 109 if (mkdtemp(dst) == NULL) 110 err(1, "mkdtemp('%s') failed", dst); 111 mntlen = strlen(dst); 112 113 /* Mount <duid>.<part> as msdos filesystem. */ 114 memset(&args, 0, sizeof(args)); 115 rslt = asprintf(&args.fspec, 116 "%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx%02hhx.%c", 117 dl->d_uid[0], dl->d_uid[1], dl->d_uid[2], dl->d_uid[3], 118 dl->d_uid[4], dl->d_uid[5], dl->d_uid[6], dl->d_uid[7], 119 part); 120 if (rslt == -1) { 121 warn("bad special device"); 122 goto rmdir; 123 } 124 125 args.export_info.ex_root = -2; 126 args.export_info.ex_flags = 0; 127 128 if (mount(MOUNT_MSDOS, dst, 0, &args) == -1) { 129 /* Try fsck'ing it. */ 130 rslt = snprintf(cmd, sizeof(cmd), fsckfmt, args.fspec); 131 if (rslt >= sizeof(cmd)) { 132 warnx("can't build fsck command"); 133 rslt = -1; 134 goto rmdir; 135 } 136 rslt = system(cmd); 137 if (rslt == -1) { 138 warn("system('%s') failed", cmd); 139 goto rmdir; 140 } 141 if (mount(MOUNT_MSDOS, dst, 0, &args) == -1) { 142 /* Try newfs'ing it. */ 143 rslt = snprintf(cmd, sizeof(cmd), newfsfmt, 144 args.fspec); 145 if (rslt >= sizeof(cmd)) { 146 warnx("can't build newfs command"); 147 rslt = -1; 148 goto rmdir; 149 } 150 rslt = system(cmd); 151 if (rslt == -1) { 152 warn("system('%s') failed", cmd); 153 goto rmdir; 154 } 155 rslt = mount(MOUNT_MSDOS, dst, 0, &args); 156 if (rslt == -1) { 157 warn("unable to mount MSDOS partition"); 158 goto rmdir; 159 } 160 } 161 } 162 163 /* 164 * Copy /usr/mdec/boot to /mnt/boot. 165 */ 166 pathlen = strlen(dst); 167 if (strlcat(dst, "/boot", sizeof(dst)) >= sizeof(dst)) { 168 rslt = -1; 169 warn("unable to build /boot path"); 170 goto umount; 171 } 172 src = fileprefix(root, "/usr/mdec/boot"); 173 if (src == NULL) { 174 rslt = -1; 175 goto umount; 176 } 177 srclen = strlen(src); 178 if (verbose) 179 fprintf(stderr, "%s %s to %s\n", 180 (nowrite ? "would copy" : "copying"), src, dst); 181 if (!nowrite) { 182 rslt = filecopy(src, dst); 183 if (rslt == -1) 184 goto umount; 185 } 186 187 rslt = 0; 188 189 umount: 190 dst[mntlen] = '\0'; 191 if (unmount(dst, MNT_FORCE) == -1) 192 err(1, "unmount('%s') failed", dst); 193 194 rmdir: 195 free(args.fspec); 196 dst[mntlen] = '\0'; 197 if (rmdir(dst) == -1) 198 err(1, "rmdir('%s') failed", dst); 199 200 free(src); 201 202 if (rslt == -1) 203 exit(1); 204 } 205 206 int 207 findmbrfat(int devfd, struct disklabel *dl) 208 { 209 struct dos_partition dp[NDOSPART]; 210 ssize_t len; 211 u_int64_t start = 0; 212 int i; 213 u_int8_t *secbuf; 214 215 if ((secbuf = malloc(dl->d_secsize)) == NULL) 216 err(1, NULL); 217 218 /* Read MBR. */ 219 len = pread(devfd, secbuf, dl->d_secsize, 0); 220 if (len != dl->d_secsize) 221 err(4, "can't read mbr"); 222 memcpy(dp, &secbuf[DOSPARTOFF], sizeof(dp)); 223 224 for (i = 0; i < NDOSPART; i++) { 225 if (dp[i].dp_typ == DOSPTYP_UNUSED) 226 continue; 227 if (dp[i].dp_typ == DOSPTYP_FAT16L || 228 dp[i].dp_typ == DOSPTYP_FAT32L || 229 dp[i].dp_typ == DOSPTYP_FAT16B) 230 start = letoh32(dp[i].dp_start); 231 } 232 233 free(secbuf); 234 235 if (start) { 236 for (i = 0; i < MAXPARTITIONS; i++) { 237 if (DL_GETPSIZE(&dl->d_partitions[i]) > 0 && 238 DL_GETPOFFSET(&dl->d_partitions[i]) == start) 239 return ('a' + i); 240 } 241 } 242 243 return (-1); 244 } 245