1 /*- 2 * Copyright (c) 2008-2014, Juniper Networks, Inc. 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 AUTHOR ``AS IS'' AND ANY EXPRESS OR 15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 17 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 19 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 20 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 21 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 22 * 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/socket.h> 32 #include <net/if.h> 33 #include <netinet/in.h> 34 #include <netinet/in_systm.h> 35 36 #include <stand.h> 37 #include <net.h> 38 #include <string.h> 39 40 #include "bootstrap.h" 41 42 extern struct in_addr servip; 43 44 extern int pkgfs_init(const char *, struct fs_ops *); 45 extern void pkgfs_cleanup(void); 46 47 COMMAND_SET(install, "install", "install software package", command_install); 48 49 static char *inst_kernel; 50 static char **inst_modules; 51 static char *inst_rootfs; 52 static char *inst_loader_rc; 53 54 static int 55 setpath(char **what, char *val) 56 { 57 char *path; 58 size_t len; 59 int rel; 60 61 len = strlen(val) + 1; 62 rel = (val[0] != '/') ? 1 : 0; 63 path = malloc(len + rel); 64 if (path == NULL) 65 return (ENOMEM); 66 path[0] = '/'; 67 strcpy(path + rel, val); 68 69 *what = path; 70 return (0); 71 } 72 73 static int 74 setmultipath(char ***what, char *val) 75 { 76 char *s, *v; 77 int count, error, idx; 78 79 count = 0; 80 v = val; 81 do { 82 count++; 83 s = strchr(v, ','); 84 v = (s == NULL) ? NULL : s + 1; 85 } while (v != NULL); 86 87 *what = calloc(count + 1, sizeof(char *)); 88 if (*what == NULL) 89 return (ENOMEM); 90 91 for (idx = 0; idx < count; idx++) { 92 s = strchr(val, ','); 93 if (s != NULL) 94 *s++ = '\0'; 95 error = setpath(*what + idx, val); 96 if (error) 97 return (error); 98 val = s; 99 } 100 101 return (0); 102 } 103 104 static int 105 read_metatags(int fd) 106 { 107 char buf[1024]; 108 char *p, *tag, *val; 109 ssize_t fsize; 110 int error; 111 112 fsize = read(fd, buf, sizeof(buf)); 113 if (fsize == -1) 114 return (errno); 115 116 /* 117 * Assume that if we read a whole buffer worth of data, we 118 * haven't read the entire file. In other words, the buffer 119 * size must always be larger than the file size. That way 120 * we can append a '\0' and use standard string operations. 121 * Return an error if this is not possible. 122 */ 123 if (fsize == sizeof(buf)) 124 return (ENOMEM); 125 126 buf[fsize] = '\0'; 127 error = 0; 128 tag = buf; 129 while (!error && *tag != '\0') { 130 val = strchr(tag, '='); 131 if (val == NULL) { 132 error = EINVAL; 133 break; 134 } 135 *val++ = '\0'; 136 p = strchr(val, '\n'); 137 if (p == NULL) { 138 error = EINVAL; 139 break; 140 } 141 *p++ = '\0'; 142 143 if (strcmp(tag, "KERNEL") == 0) 144 error = setpath(&inst_kernel, val); 145 else if (strcmp(tag, "MODULES") == 0) 146 error = setmultipath(&inst_modules, val); 147 else if (strcmp(tag, "ROOTFS") == 0) 148 error = setpath(&inst_rootfs, val); 149 else if (strcmp(tag, "LOADER_RC") == 0) 150 error = setpath(&inst_loader_rc, val); 151 152 tag = p; 153 } 154 155 return (error); 156 } 157 158 static void 159 cleanup(void) 160 { 161 u_int i; 162 163 if (inst_kernel != NULL) { 164 free(inst_kernel); 165 inst_kernel = NULL; 166 } 167 if (inst_modules != NULL) { 168 i = 0; 169 while (inst_modules[i] != NULL) 170 free(inst_modules[i++]); 171 free(inst_modules); 172 inst_modules = NULL; 173 } 174 if (inst_rootfs != NULL) { 175 free(inst_rootfs); 176 inst_rootfs = NULL; 177 } 178 if (inst_loader_rc != NULL) { 179 free(inst_loader_rc); 180 inst_loader_rc = NULL; 181 } 182 pkgfs_cleanup(); 183 } 184 185 /* 186 * usage: install URL 187 * where: URL = tftp://[host]/<package> 188 * or file://[devname[:fstype]]/<package> 189 */ 190 static int 191 install(char *pkgname) 192 { 193 static char buf[256]; 194 struct fs_ops *proto; 195 struct preloaded_file *fp; 196 char *e, *s, *currdev; 197 char *devname; 198 size_t devnamelen; 199 int error, fd, i, local; 200 201 s = strstr(pkgname, "://"); 202 if (s == NULL) 203 goto invalid_url; 204 205 i = s - pkgname; 206 s += 3; 207 if (*s == '\0') 208 goto invalid_url; 209 210 devname = NULL; 211 devnamelen = 0; 212 proto = NULL; 213 local = 0; 214 215 if (i == 4 && !strncasecmp(pkgname, "tftp", i)) { 216 devname = "net0"; 217 devnamelen = 4; 218 proto = &tftp_fsops; 219 } else if (i == 4 && !strncasecmp(pkgname, "file", i)) { 220 currdev = getenv("currdev"); 221 local = 1; 222 223 if (*s == '/') { /* file:/// */ 224 if (devname == NULL) 225 devname = currdev; 226 if (devname == NULL) 227 devname = "disk1"; 228 } else { /* file://devname[:fstype]/ */ 229 devname = s; 230 e = strchr(devname, '/'); 231 if (!e) 232 goto invalid_url; 233 devnamelen = e - devname; 234 s = e; /* consume devname */ 235 } 236 if ((e = strchr(devname, ':')) != NULL) { 237 /* could be :fstype */ 238 devnamelen = e - devname; 239 switch (e[1]) { 240 case '\0': /* just currdev */ 241 break; 242 case 'd': 243 proto = &dosfs_fsops; 244 break; 245 #ifdef HOSTPROG 246 case 'h': 247 { 248 extern struct fs_ops host_fsops; 249 250 proto = &host_fsops; 251 } 252 break; 253 #endif 254 case 'u': 255 proto = &ufs_fsops; 256 break; 257 } 258 } 259 if (proto == NULL && strncmp(devname, "disk", 4) == 0) { 260 proto = &dosfs_fsops; 261 } 262 } 263 264 if (devname == NULL) 265 goto invalid_url; 266 267 if (devnamelen == 0) { 268 /* default is currdev which ends with ':' */ 269 devnamelen = strlen(devname); 270 if (devname[devnamelen - 1] == ':') 271 devnamelen--; 272 } 273 274 if (*s != '/' ) { 275 if (local) 276 goto invalid_url; 277 278 pkgname = strchr(s, '/'); 279 if (pkgname == NULL) 280 goto invalid_url; 281 282 *pkgname = '\0'; 283 servip.s_addr = inet_addr(s); 284 if (servip.s_addr == htonl(INADDR_NONE)) 285 goto invalid_url; 286 287 setenv("serverip", inet_ntoa(servip), 1); 288 289 *pkgname = '/'; 290 } else 291 pkgname = s; 292 293 i = snprintf(buf, sizeof(buf), "%.*s:%s", 294 (int) devnamelen, devname, pkgname); 295 if (i >= (int) sizeof(buf)) { 296 command_errmsg = "package name too long"; 297 return (CMD_ERROR); 298 } 299 setenv("install_package", buf, 1); 300 301 error = pkgfs_init(buf, proto); 302 if (error) { 303 command_errmsg = "cannot open package"; 304 goto fail; 305 } 306 307 /* 308 * Point of no return: unload anything that may have been 309 * loaded and prune the environment from harmful variables. 310 */ 311 unload(); 312 unsetenv("vfs.root.mountfrom"); 313 314 /* 315 * read the metatags file. 316 */ 317 fd = open("/metatags", O_RDONLY); 318 if (fd != -1) { 319 error = read_metatags(fd); 320 close(fd); 321 if (error) { 322 command_errmsg = "cannot load metatags"; 323 goto fail; 324 } 325 } 326 327 s = (inst_kernel == NULL) ? "/kernel" : inst_kernel; 328 error = mod_loadkld(s, 0, NULL); 329 if (error) { 330 command_errmsg = "cannot load kernel from package"; 331 goto fail; 332 } 333 334 /* If there is a loader.rc in the package, execute it */ 335 s = (inst_loader_rc == NULL) ? "/loader.rc" : inst_loader_rc; 336 fd = open(s, O_RDONLY); 337 if (fd != -1) { 338 close(fd); 339 error = interp_include(s); 340 if (error == CMD_ERROR) 341 goto fail; 342 } 343 344 i = 0; 345 while (inst_modules != NULL && inst_modules[i] != NULL) { 346 error = mod_loadkld(inst_modules[i], 0, NULL); 347 if (error) { 348 command_errmsg = "cannot load module(s) from package"; 349 goto fail; 350 } 351 i++; 352 } 353 354 s = (inst_rootfs == NULL) ? "/install.iso" : inst_rootfs; 355 if (file_loadraw(s, "mfs_root", 1) == NULL) { 356 error = errno; 357 command_errmsg = "cannot load root file system"; 358 goto fail; 359 } 360 361 cleanup(); 362 363 fp = file_findfile(NULL, NULL); 364 if (fp != NULL) 365 file_formats[fp->f_loader]->l_exec(fp); 366 error = CMD_ERROR; 367 command_errmsg = "unable to start installation"; 368 369 fail: 370 sprintf(buf, "%s (error %d)", command_errmsg, error); 371 cleanup(); 372 unload(); 373 exclusive_file_system = NULL; 374 command_errmsg = buf; /* buf is static. */ 375 return (CMD_ERROR); 376 377 invalid_url: 378 command_errmsg = "invalid URL"; 379 return (CMD_ERROR); 380 } 381 382 static int 383 command_install(int argc, char *argv[]) 384 { 385 int argidx; 386 387 unsetenv("install_format"); 388 389 argidx = 1; 390 while (1) { 391 if (argc == argidx) { 392 command_errmsg = 393 "usage: install [--format] <URL>"; 394 return (CMD_ERROR); 395 } 396 if (!strcmp(argv[argidx], "--format")) { 397 setenv("install_format", "yes", 1); 398 argidx++; 399 continue; 400 } 401 break; 402 } 403 404 return (install(argv[argidx])); 405 } 406