1 /* $OpenBSD: loongson_installboot.c,v 1.3 2020/07/19 15:23:08 visa Exp $ */ 2 /* $NetBSD: installboot.c,v 1.5 1995/11/17 23:23:50 gwr Exp $ */ 3 4 /* 5 * Copyright (c) 2011 Joel Sing <jsing@openbsd.org> 6 * Copyright (c) 2010 Otto Moerbeek <otto@openbsd.org> 7 * Copyright (c) 2003 Tom Cosgrove <tom.cosgrove@arches-consulting.com> 8 * Copyright (c) 1997 Michael Shalayeff 9 * Copyright (c) 1994 Paul Kranenburg 10 * All rights reserved. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by Paul Kranenburg. 23 * 4. The name of the author may not be used to endorse or promote products 24 * derived from this software without specific prior written permission 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 27 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 28 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 29 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 30 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 31 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 32 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 33 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 34 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 35 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 #include <sys/param.h> /* DEV_BSIZE */ 39 #include <sys/disklabel.h> 40 #include <sys/dkio.h> 41 #include <sys/ioctl.h> 42 #include <sys/mount.h> 43 #include <sys/stat.h> 44 45 #include <err.h> 46 #include <errno.h> 47 #include <fcntl.h> 48 #include <stdlib.h> 49 #include <stdio.h> 50 #include <string.h> 51 #include <unistd.h> 52 #include <util.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_ext2fs %s >/dev/null"; 97 static char *newfsfmt ="/sbin/newfs_ext2fs %s >/dev/null"; 98 struct ufs_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 ext2fs 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_EXT2FS, 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_EXT2FS, 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_EXT2FS, dst, 0, &args); 156 if (rslt == -1) { 157 warn("unable to mount ext2fs partition"); 158 goto rmdir; 159 } 160 } 161 } 162 163 /* Create "/boot" directory in <duid>.<part>. */ 164 if (strlcat(dst, "/boot", sizeof(dst)) >= sizeof(dst)) { 165 rslt = -1; 166 warn("unable to build /boot directory"); 167 goto umount; 168 } 169 rslt = mkdir(dst, 0755); 170 if (rslt == -1 && errno != EEXIST) { 171 warn("mkdir('%s') failed", dst); 172 goto umount; 173 } 174 175 /* 176 * Copy /usr/mdec/boot to /boot/boot. 177 */ 178 pathlen = strlen(dst); 179 if (strlcat(dst, "/boot", sizeof(dst)) >= sizeof(dst)) { 180 rslt = -1; 181 warn("unable to build /boot path"); 182 goto umount; 183 } 184 src = fileprefix(root, "/usr/mdec/boot"); 185 if (src == NULL) { 186 rslt = -1; 187 goto umount; 188 } 189 srclen = strlen(src); 190 if (verbose) 191 fprintf(stderr, "%s %s to %s\n", 192 (nowrite ? "would copy" : "copying"), src, dst); 193 if (!nowrite) { 194 rslt = filecopy(src, dst); 195 if (rslt == -1) 196 goto umount; 197 } 198 199 rslt = 0; 200 201 umount: 202 dst[mntlen] = '\0'; 203 if (unmount(dst, MNT_FORCE) == -1) 204 err(1, "unmount('%s') failed", dst); 205 206 rmdir: 207 free(args.fspec); 208 dst[mntlen] = '\0'; 209 if (rmdir(dst) == -1) 210 err(1, "rmdir('%s') failed", dst); 211 212 free(src); 213 214 if (rslt == -1) 215 exit(1); 216 } 217 218 int 219 findmbrfat(int devfd, struct disklabel *dl) 220 { 221 struct dos_partition dp[NDOSPART]; 222 ssize_t len; 223 u_int64_t start = 0; 224 int i; 225 u_int8_t *secbuf; 226 227 if ((secbuf = malloc(dl->d_secsize)) == NULL) 228 err(1, NULL); 229 230 /* Read MBR. */ 231 len = pread(devfd, secbuf, dl->d_secsize, 0); 232 if (len != dl->d_secsize) 233 err(4, "can't read mbr"); 234 memcpy(dp, &secbuf[DOSPARTOFF], sizeof(dp)); 235 236 for (i = 0; i < NDOSPART; i++) { 237 if (dp[i].dp_typ == DOSPTYP_UNUSED) 238 continue; 239 if (dp[i].dp_typ == DOSPTYP_LINUX) 240 start = dp[i].dp_start; 241 } 242 243 free(secbuf); 244 245 if (start) { 246 for (i = 0; i < MAXPARTITIONS; i++) { 247 if (DL_GETPSIZE(&dl->d_partitions[i]) > 0 && 248 DL_GETPOFFSET(&dl->d_partitions[i]) == start) 249 return ('a' + i); 250 } 251 } 252 253 return (-1); 254 } 255