1 /*- 2 * Copyright (c) 2012 Baptiste Daroussin <bapt@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 AUTHOR 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 AUTHOR 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/elf_common.h> 32 #include <sys/endian.h> 33 #include <sys/wait.h> 34 35 #include <archive.h> 36 #include <archive_entry.h> 37 #include <ctype.h> 38 #include <err.h> 39 #include <errno.h> 40 #include <fcntl.h> 41 #include <fetch.h> 42 #include <gelf.h> 43 #include <paths.h> 44 #include <stdlib.h> 45 #include <stdio.h> 46 #include <string.h> 47 #include <time.h> 48 #include <unistd.h> 49 50 #include "elf_tables.h" 51 52 #define _LOCALBASE "/usr/local" 53 #define _PKGS_URL "http://pkgbeta.FreeBSD.org" 54 55 static const char * 56 elf_corres_to_string(struct _elf_corres *m, int e) 57 { 58 int i; 59 60 for (i = 0; m[i].string != NULL; i++) 61 if (m[i].elf_nb == e) 62 return (m[i].string); 63 64 return ("unknown"); 65 } 66 67 static int 68 pkg_get_myabi(char *dest, size_t sz) 69 { 70 Elf *elf; 71 Elf_Data *data; 72 Elf_Note note; 73 Elf_Scn *scn; 74 char *src, *osname; 75 const char *abi; 76 GElf_Ehdr elfhdr; 77 GElf_Shdr shdr; 78 int fd, i, ret; 79 uint32_t version; 80 81 version = 0; 82 ret = -1; 83 scn = NULL; 84 abi = NULL; 85 86 if (elf_version(EV_CURRENT) == EV_NONE) { 87 warnx("ELF library initialization failed: %s", 88 elf_errmsg(-1)); 89 return (-1); 90 } 91 92 if ((fd = open("/bin/sh", O_RDONLY)) < 0) { 93 warn("open()"); 94 return (-1); 95 } 96 97 if ((elf = elf_begin(fd, ELF_C_READ, NULL)) == NULL) { 98 ret = -1; 99 warnx("elf_begin() failed: %s.", elf_errmsg(-1)); 100 goto cleanup; 101 } 102 103 if (gelf_getehdr(elf, &elfhdr) == NULL) { 104 ret = -1; 105 warn("getehdr() failed: %s.", elf_errmsg(-1)); 106 goto cleanup; 107 } 108 109 while ((scn = elf_nextscn(elf, scn)) != NULL) { 110 if (gelf_getshdr(scn, &shdr) != &shdr) { 111 ret = -1; 112 warn("getshdr() failed: %s.", elf_errmsg(-1)); 113 goto cleanup; 114 } 115 116 if (shdr.sh_type == SHT_NOTE) 117 break; 118 } 119 120 if (scn == NULL) { 121 ret = -1; 122 warn("failed to get the note section"); 123 goto cleanup; 124 } 125 126 data = elf_getdata(scn, NULL); 127 src = data->d_buf; 128 for (;;) { 129 memcpy(¬e, src, sizeof(Elf_Note)); 130 src += sizeof(Elf_Note); 131 if (note.n_type == NT_VERSION) 132 break; 133 src += note.n_namesz + note.n_descsz; 134 } 135 osname = src; 136 src += note.n_namesz; 137 if (elfhdr.e_ident[EI_DATA] == ELFDATA2MSB) 138 version = be32dec(src); 139 else 140 version = le32dec(src); 141 142 for (i = 0; osname[i] != '\0'; i++) 143 osname[i] = (char)tolower(osname[i]); 144 145 snprintf(dest, sz, "%s:%d:%s:%s", 146 osname, version / 100000, 147 elf_corres_to_string(mach_corres, (int)elfhdr.e_machine), 148 elf_corres_to_string(wordsize_corres, 149 (int)elfhdr.e_ident[EI_CLASS])); 150 151 ret = 0; 152 153 switch (elfhdr.e_machine) { 154 case EM_ARM: 155 snprintf(dest + strlen(dest), sz - strlen(dest), 156 ":%s:%s:%s", elf_corres_to_string(endian_corres, 157 (int)elfhdr.e_ident[EI_DATA]), 158 (elfhdr.e_flags & EF_ARM_NEW_ABI) > 0 ? 159 "eabi" : "oabi", 160 (elfhdr.e_flags & EF_ARM_VFP_FLOAT) > 0 ? 161 "softfp" : "vfp"); 162 break; 163 case EM_MIPS: 164 /* 165 * this is taken from binutils sources: 166 * include/elf/mips.h 167 * mapping is figured out from binutils: 168 * gas/config/tc-mips.c 169 */ 170 switch (elfhdr.e_flags & EF_MIPS_ABI) { 171 case E_MIPS_ABI_O32: 172 abi = "o32"; 173 break; 174 case E_MIPS_ABI_N32: 175 abi = "n32"; 176 break; 177 default: 178 if (elfhdr.e_ident[EI_DATA] == 179 ELFCLASS32) 180 abi = "o32"; 181 else if (elfhdr.e_ident[EI_DATA] == 182 ELFCLASS64) 183 abi = "n64"; 184 break; 185 } 186 snprintf(dest + strlen(dest), sz - strlen(dest), 187 ":%s:%s", elf_corres_to_string(endian_corres, 188 (int)elfhdr.e_ident[EI_DATA]), abi); 189 break; 190 } 191 192 cleanup: 193 if (elf != NULL) 194 elf_end(elf); 195 196 close(fd); 197 return (ret); 198 } 199 200 static int 201 extract_pkg_static(int fd, char *p, int sz) 202 { 203 struct archive *a; 204 struct archive_entry *ae; 205 char *end; 206 int ret, r; 207 208 ret = -1; 209 a = archive_read_new(); 210 if (a == NULL) { 211 warn("archive_read_new"); 212 return (ret); 213 } 214 archive_read_support_compression_all(a); 215 archive_read_support_format_tar(a); 216 217 if (lseek(fd, 0, 0) == -1) { 218 warn("lseek"); 219 goto cleanup; 220 } 221 222 if (archive_read_open_fd(a, fd, 4096) != ARCHIVE_OK) { 223 warnx("archive_read_open_fd: %s", archive_error_string(a)); 224 goto cleanup; 225 } 226 227 ae = NULL; 228 while ((r = archive_read_next_header(a, &ae)) == ARCHIVE_OK) { 229 end = strrchr(archive_entry_pathname(ae), '/'); 230 if (end == NULL) 231 continue; 232 233 if (strcmp(end, "/pkg-static") == 0) { 234 r = archive_read_extract(a, ae, 235 ARCHIVE_EXTRACT_OWNER | ARCHIVE_EXTRACT_PERM | 236 ARCHIVE_EXTRACT_TIME | ARCHIVE_EXTRACT_ACL | 237 ARCHIVE_EXTRACT_FFLAGS | ARCHIVE_EXTRACT_XATTR); 238 strlcpy(p, archive_entry_pathname(ae), sz); 239 break; 240 } 241 } 242 243 if (r == ARCHIVE_OK) 244 ret = 0; 245 else 246 warnx("fail to extract pkg-static"); 247 248 cleanup: 249 archive_read_finish(a); 250 return (ret); 251 252 } 253 254 static int 255 install_pkg_static(char *path, char *pkgpath) 256 { 257 int pstat; 258 pid_t pid; 259 260 switch ((pid = fork())) { 261 case -1: 262 return (-1); 263 case 0: 264 execl(path, "pkg-static", "add", pkgpath, (char *)NULL); 265 _exit(1); 266 default: 267 break; 268 } 269 270 while (waitpid(pid, &pstat, 0) == -1) 271 if (errno != EINTR) 272 return (-1); 273 274 if (WEXITSTATUS(pstat)) 275 return (WEXITSTATUS(pstat)); 276 else if (WIFSIGNALED(pstat)) 277 return (128 & (WTERMSIG(pstat))); 278 return (pstat); 279 } 280 281 static int 282 bootstrap_pkg(void) 283 { 284 FILE *remote; 285 FILE *config; 286 char *site; 287 char url[MAXPATHLEN]; 288 char conf[MAXPATHLEN]; 289 char abi[BUFSIZ]; 290 char tmppkg[MAXPATHLEN]; 291 char buf[10240]; 292 char pkgstatic[MAXPATHLEN]; 293 int fd, retry, ret; 294 struct url_stat st; 295 off_t done, r; 296 time_t now; 297 time_t last; 298 299 done = 0; 300 last = 0; 301 ret = -1; 302 remote = NULL; 303 config = NULL; 304 305 printf("Bootstrapping pkg please wait\n"); 306 307 if (pkg_get_myabi(abi, MAXPATHLEN) != 0) { 308 warnx("failed to determine the system ABI"); 309 return (-1); 310 } 311 312 if (getenv("PACKAGESITE") != NULL) 313 snprintf(url, MAXPATHLEN, "%s/Latest/pkg.txz", getenv("PACKAGESITE")); 314 else 315 snprintf(url, MAXPATHLEN, "%s/%s/latest/Latest/pkg.txz", 316 getenv("PACKAGEROOT") ? getenv("PACKAGEROOT") : _PKGS_URL, 317 getenv("ABI") ? getenv("ABI") : abi); 318 319 snprintf(tmppkg, MAXPATHLEN, "%s/pkg.txz.XXXXXX", 320 getenv("TMPDIR") ? getenv("TMPDIR") : _PATH_TMP); 321 322 if ((fd = mkstemp(tmppkg)) == -1) { 323 warn("mkstemp()"); 324 return (-1); 325 } 326 327 retry = 3; 328 do { 329 remote = fetchXGetURL(url, &st, ""); 330 if (remote == NULL) 331 sleep(1); 332 } while (remote == NULL && retry-- > 0); 333 334 if (remote == NULL) 335 goto fetchfail; 336 337 while (done < st.size) { 338 if ((r = fread(buf, 1, sizeof(buf), remote)) < 1) 339 break; 340 341 if (write(fd, buf, r) != r) { 342 warn("write()"); 343 goto cleanup; 344 } 345 346 done += r; 347 now = time(NULL); 348 if (now > last || done == st.size) 349 last = now; 350 } 351 352 if (ferror(remote)) 353 goto fetchfail; 354 355 if ((ret = extract_pkg_static(fd, pkgstatic, MAXPATHLEN)) == 0) 356 ret = install_pkg_static(pkgstatic, tmppkg); 357 358 snprintf(conf, MAXPATHLEN, "%s/etc/pkg.conf", 359 getenv("LOCALBASE") ? getenv("LOCALBASE") : _LOCALBASE); 360 361 if (access(conf, R_OK) == -1) { 362 site = strrchr(url, '/'); 363 if (site == NULL) 364 goto cleanup; 365 site[0] = '\0'; 366 site = strrchr(url, '/'); 367 if (site == NULL) 368 goto cleanup; 369 site[0] = '\0'; 370 371 config = fopen(conf, "w+"); 372 if (config == NULL) 373 goto cleanup; 374 fprintf(config, "packagesite: %s\n", url); 375 fclose(config); 376 } 377 378 goto cleanup; 379 380 fetchfail: 381 warnx("Error fetching %s: %s", url, fetchLastErrString); 382 383 cleanup: 384 if (remote != NULL) 385 fclose(remote); 386 close(fd); 387 unlink(tmppkg); 388 389 return (ret); 390 } 391 392 static const char confirmation_message[] = 393 "The package management tool is not yet installed on your system.\n" 394 "Do you want to fetch and install it now? [y/N]: "; 395 396 static int 397 pkg_query_yes_no(void) 398 { 399 int ret, c; 400 401 c = getchar(); 402 403 if (c == 'y' || c == 'Y') 404 ret = 1; 405 else 406 ret = 0; 407 408 while (c != '\n' && c != EOF) 409 c = getchar(); 410 411 return (ret); 412 } 413 414 int 415 main(__unused int argc, char *argv[]) 416 { 417 char pkgpath[MAXPATHLEN]; 418 419 snprintf(pkgpath, MAXPATHLEN, "%s/sbin/pkg", 420 getenv("LOCALBASE") ? getenv("LOCALBASE") : _LOCALBASE); 421 422 if (access(pkgpath, X_OK) == -1) { 423 /* 424 * Do not ask for confirmation if either of stdin or stdout is 425 * not tty. Check the environment to see if user has answer 426 * tucked in there already. 427 */ 428 if (getenv("ASSUME_ALWAYS_YES") == NULL) { 429 printf("%s", confirmation_message); 430 if (!isatty(fileno(stdin))) 431 exit(EXIT_FAILURE); 432 433 if (pkg_query_yes_no() == 0) 434 exit(EXIT_FAILURE); 435 } 436 if (bootstrap_pkg() != 0) 437 exit(EXIT_FAILURE); 438 } 439 440 execv(pkgpath, argv); 441 442 /* NOT REACHED */ 443 return (EXIT_FAILURE); 444 } 445