archival/rpm.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * Mini rpm applet for busybox
   4  *
   5  * Copyright (C) 2001,2002 by Laurence Anderson
   6  *
   7  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
   8  */
   9 //config:config RPM
  10 //config:       bool "rpm (32 kb)"
  11 //config:       default y
  12 //config:       help
  13 //config:       Mini RPM applet - queries and extracts RPM packages.
  14
  15 //applet:IF_RPM(APPLET(rpm, BB_DIR_BIN, BB_SUID_DROP))
  16
  17 //kbuild:lib-$(CONFIG_RPM) += rpm.o
  18
  19 #include "libbb.h"
  20 #include "common_bufsiz.h"
  21 #include "bb_archive.h"
  22 #include "rpm.h"
  23
  24 #define RPM_CHAR_TYPE           1
  25 #define RPM_INT8_TYPE           2
  26 #define RPM_INT16_TYPE          3
  27 #define RPM_INT32_TYPE          4
  28 /* #define RPM_INT64_TYPE       5   ---- These aren't supported (yet) */
  29 #define RPM_STRING_TYPE         6
  30 #define RPM_BIN_TYPE            7
  31 #define RPM_STRING_ARRAY_TYPE   8
  32 #define RPM_I18NSTRING_TYPE     9
  33
  34 #define TAG_NAME                1000
  35 #define TAG_VERSION             1001
  36 #define TAG_RELEASE             1002
  37 #define TAG_SUMMARY             1004
  38 #define TAG_DESCRIPTION         1005
  39 #define TAG_BUILDTIME           1006
  40 #define TAG_BUILDHOST           1007
  41 #define TAG_SIZE                1009
  42 #define TAG_VENDOR              1011
  43 #define TAG_LICENSE             1014
  44 #define TAG_PACKAGER            1015
  45 #define TAG_GROUP               1016
  46 #define TAG_URL                 1020
  47 #define TAG_PREIN               1023
  48 #define TAG_POSTIN              1024
  49 #define TAG_FILEFLAGS           1037
  50 #define TAG_FILEUSERNAME        1039
  51 #define TAG_FILEGROUPNAME       1040
  52 #define TAG_SOURCERPM           1044
  53 #define TAG_PREINPROG           1085
  54 #define TAG_POSTINPROG          1086
  55 #define TAG_PREFIXS             1098
  56 #define TAG_DIRINDEXES          1116
  57 #define TAG_BASENAMES           1117
  58 #define TAG_DIRNAMES            1118
  59 #define TAG_PAYLOADCOMPRESSOR   1125
  60
  61
  62 #define RPMFILE_CONFIG          (1 << 0)
  63 #define RPMFILE_DOC             (1 << 1)
  64
  65 enum rpm_functions_e {
  66         rpm_query = 1,
  67         rpm_install = 2,
  68         rpm_query_info = 4,
  69         rpm_query_package = 8,
  70         rpm_query_list = 16,
  71         rpm_query_list_doc = 32,
  72         rpm_query_list_config = 64
  73 };
  74
  75 typedef struct {
  76         uint32_t tag; /* 4 byte tag */
  77         uint32_t type; /* 4 byte type */
  78         uint32_t offset; /* 4 byte offset */
  79         uint32_t count; /* 4 byte count */
  80 } rpm_index;
  81
  82 struct globals {
  83         void *map;
  84         rpm_index *mytags;
  85         int tagcount;
  86         unsigned mapsize, pagesize;
  87 } FIX_ALIASING;
  88 #define G (*(struct globals*)bb_common_bufsiz1)
  89 #define INIT_G() do { setup_common_bufsiz(); } while (0)
  90
  91 static int rpm_gettags(const char *filename)
  92 {
  93         rpm_index *tags;
  94         int fd;
  95         unsigned pass, idx;
  96         unsigned storepos;
  97
  98         if (!filename) { /* rpm2cpio w/o filename? */
  99                 filename = bb_msg_standard_output;
 100                 fd = 0;
 101         } else {
 102                 fd = xopen(filename, O_RDONLY);
 103         }
 104
 105         storepos = xlseek(fd, 96, SEEK_CUR); /* Seek past the unused lead */
 106         G.tagcount = 0;
 107         tags = NULL;
 108         idx = 0;
 109         /* 1st pass is the signature headers, 2nd is the main stuff */
 110         for (pass = 0; pass < 2; pass++) {
 111                 struct rpm_header header;
 112                 unsigned cnt;
 113
 114                 xread(fd, &header, sizeof(header));
 115                 if (header.magic_and_ver != htonl(RPM_HEADER_MAGICnVER))
 116                         bb_error_msg_and_die("invalid RPM header magic in '%s'", filename);
 117                 header.size = ntohl(header.size);
 118                 cnt = ntohl(header.entries);
 119                 storepos += sizeof(header) + cnt * 16;
 120
 121                 G.tagcount += cnt;
 122                 tags = xrealloc(tags, sizeof(tags[0]) * G.tagcount);
 123                 xread(fd, &tags[idx], sizeof(tags[0]) * cnt);
 124                 while (cnt--) {
 125                         rpm_index *tag = &tags[idx];
 126                         tag->tag = ntohl(tag->tag);
 127                         tag->type = ntohl(tag->type);
 128                         tag->count = ntohl(tag->count);
 129                         tag->offset = storepos + ntohl(tag->offset);
 130                         if (pass == 0)
 131                                 tag->tag -= 743;
 132                         idx++;
 133                 }
 134                 /* Skip padding to 8 byte boundary after reading signature headers */
 135                 if (pass == 0)
 136                         while (header.size & 7)
 137                                 header.size++;
 138                 /* Seek past store */
 139                 storepos = xlseek(fd, header.size, SEEK_CUR);
 140         }
 141         G.mytags = tags;
 142
 143         /* Map the store */
 144         storepos = (storepos + G.pagesize) & -(int)G.pagesize;
 145         /* remember size for munmap */
 146         G.mapsize = storepos;
 147         /* some NOMMU systems prefer MAP_PRIVATE over MAP_SHARED */
 148         G.map = mmap(0, storepos, PROT_READ, MAP_PRIVATE, fd, 0);
 149         if (G.map == MAP_FAILED)
 150                 bb_perror_msg_and_die("mmap '%s'", filename);
 151
 152         return fd;
 153 }
 154
 155 static int bsearch_rpmtag(const void *key, const void *item)
 156 {
 157         int *tag = (int *)key;
 158         rpm_index *tmp = (rpm_index *) item;
 159         return (*tag - tmp->tag);
 160 }
 161
 162 static char *rpm_getstr(int tag, int itemindex)
 163 {
 164         rpm_index *found;
 165         found = bsearch(&tag, G.mytags, G.tagcount, sizeof(G.mytags[0]), bsearch_rpmtag);
 166         if (!found || itemindex >= found->count)
 167                 return NULL;
 168         if (found->type == RPM_STRING_TYPE
 169          || found->type == RPM_I18NSTRING_TYPE
 170          || found->type == RPM_STRING_ARRAY_TYPE
 171         ) {
 172                 int n;
 173                 char *tmpstr = (char *) G.map + found->offset;
 174                 for (n = 0; n < itemindex; n++)
 175                         tmpstr = tmpstr + strlen(tmpstr) + 1;
 176                 return tmpstr;
 177         }
 178         return NULL;
 179 }
 180 static char *rpm_getstr0(int tag)
 181 {
 182         return rpm_getstr(tag, 0);
 183 }
 184
 185 #if ENABLE_RPM
 186
 187 static int rpm_getint(int tag, int itemindex)
 188 {
 189         rpm_index *found;
 190         char *tmpint;
 191
 192         /* gcc throws warnings here when sizeof(void*)!=sizeof(int) ...
 193          * it's ok to ignore it because tag won't be used as a pointer */
 194         found = bsearch(&tag, G.mytags, G.tagcount, sizeof(G.mytags[0]), bsearch_rpmtag);
 195         if (!found || itemindex >= found->count)
 196                 return -1;
 197
 198         tmpint = (char *) G.map + found->offset;
 199         if (found->type == RPM_INT32_TYPE) {
 200                 tmpint += itemindex*4;
 201                 return ntohl(*(int32_t*)tmpint);
 202         }
 203         if (found->type == RPM_INT16_TYPE) {
 204                 tmpint += itemindex*2;
 205                 return ntohs(*(int16_t*)tmpint);
 206         }
 207         if (found->type == RPM_INT8_TYPE) {
 208                 tmpint += itemindex;
 209                 return *(int8_t*)tmpint;
 210         }
 211         return -1;
 212 }
 213
 214 static int rpm_getcount(int tag)
 215 {
 216         rpm_index *found;
 217         found = bsearch(&tag, G.mytags, G.tagcount, sizeof(G.mytags[0]), bsearch_rpmtag);
 218         if (!found)
 219                 return 0;
 220         return found->count;
 221 }
 222
 223 static void fileaction_dobackup(char *filename, int fileref)
 224 {
 225         struct stat oldfile;
 226         int stat_res;
 227         char *newname;
 228         if (rpm_getint(TAG_FILEFLAGS, fileref) & RPMFILE_CONFIG) {
 229                 /* Only need to backup config files */
 230                 stat_res = lstat(filename, &oldfile);
 231                 if (stat_res == 0 && S_ISREG(oldfile.st_mode)) {
 232                         /* File already exists  - really should check MD5's etc to see if different */
 233                         newname = xasprintf("%s.rpmorig", filename);
 234                         copy_file(filename, newname, FILEUTILS_RECUR | FILEUTILS_PRESERVE_STATUS);
 235                         remove_file(filename, FILEUTILS_RECUR | FILEUTILS_FORCE);
 236                         free(newname);
 237                 }
 238         }
 239 }
 240
 241 static void fileaction_setowngrp(char *filename, int fileref)
 242 {
 243         /* real rpm warns: "user foo does not exist - using <you>" */
 244         struct passwd *pw = getpwnam(rpm_getstr(TAG_FILEUSERNAME, fileref));
 245         int uid = pw ? pw->pw_uid : getuid(); /* or euid? */
 246         struct group *gr = getgrnam(rpm_getstr(TAG_FILEGROUPNAME, fileref));
 247         int gid = gr ? gr->gr_gid : getgid();
 248         chown(filename, uid, gid);
 249 }
 250
 251 static void loop_through_files(int filetag, void (*fileaction)(char *filename, int fileref))
 252 {
 253         int count = 0;
 254         while (rpm_getstr(filetag, count)) {
 255                 char* filename = xasprintf("%s%s",
 256                         rpm_getstr(TAG_DIRNAMES, rpm_getint(TAG_DIRINDEXES, count)),
 257                         rpm_getstr(TAG_BASENAMES, count));
 258                 fileaction(filename, count++);
 259                 free(filename);
 260         }
 261 }
 262
 263 #if 0 //DEBUG
 264 static void print_all_tags(void)
 265 {
 266         unsigned i = 0;
 267         while (i < G.tagcount) {
 268                 rpm_index *tag = &G.mytags[i];
 269                 if (tag->type == RPM_STRING_TYPE
 270                  || tag->type == RPM_I18NSTRING_TYPE
 271                  || tag->type == RPM_STRING_ARRAY_TYPE
 272                 ) {
 273                         unsigned n;
 274                         char *str = (char *) G.map + tag->offset;
 275
 276                         printf("tag[%u] %08x type %08x offset %08x count %d '%s'\n",
 277                                 i, tag->tag, tag->type, tag->offset, tag->count, str
 278                         );
 279                         for (n = 1; n < tag->count; n++) {
 280                                 str += strlen(str) + 1;
 281                                 printf("\t'%s'\n", str);
 282                         }
 283                 }
 284                 i++;
 285         }
 286 }
 287 #else
 288 #define print_all_tags() ((void)0)
 289 #endif
 290
 291 static void extract_cpio(int fd, const char *source_rpm)
 292 {
 293         archive_handle_t *archive_handle;
 294
 295         if (source_rpm != NULL) {
 296                 /* Binary rpm (it was built from some SRPM), install to root */
 297                 xchdir("/");
 298         } /* else: SRPM, install to current dir */
 299
 300         /* Initialize */
 301         archive_handle = init_handle();
 302         archive_handle->seek = seek_by_read;
 303         archive_handle->action_data = data_extract_all;
 304 #if 0 /* For testing (rpm -i only lists the files in internal cpio): */
 305         archive_handle->action_header = header_list;
 306         archive_handle->action_data = data_skip;
 307 #endif
 308         archive_handle->ah_flags = ARCHIVE_RESTORE_DATE | ARCHIVE_CREATE_LEADING_DIRS
 309                 /* compat: overwrite existing files.
 310                  * try "rpm -i foo.src.rpm" few times in a row -
 311                  * standard rpm will not complain.
 312                  */
 313                 | ARCHIVE_REPLACE_VIA_RENAME;
 314         archive_handle->src_fd = fd;
 315         /*archive_handle->offset = 0; - init_handle() did it */
 316
 317         setup_unzip_on_fd(archive_handle->src_fd, /*fail_if_not_compressed:*/ 1);
 318         while (get_header_cpio(archive_handle) == EXIT_SUCCESS)
 319                 continue;
 320 }
 321
 322 //usage:#define rpm_trivial_usage
 323 //usage:       "-i PACKAGE.rpm; rpm -qp[ildc] PACKAGE.rpm"
 324 //usage:#define rpm_full_usage "\n\n"
 325 //usage:       "Manipulate RPM packages\n"
 326 //usage:     "\nCommands:"
 327 //usage:     "\n        -i      Install package"
 328 //usage:     "\n        -qp     Query package"
 329 //usage:     "\n        -qpi    Show information"
 330 //usage:     "\n        -qpl    List contents"
 331 //usage:     "\n        -qpd    List documents"
 332 //usage:     "\n        -qpc    List config files"
 333
 334 /* RPM version 4.13.0.1:
 335  * Unlike -q, -i seems to imply -p: -i, -ip and -pi work the same.
 336  * OTOH, with -q order is important: "-piq FILE.rpm" works as -qp, not -qpi
 337  * (IOW: shows only package name, not package info).
 338  * "-iq ARG" works as -q: treats ARG as package name, not a file.
 339  *
 340  * "man rpm" on -l option and options implying it:
 341  * -l, --list           List files in package.
 342  * -c, --configfiles    List only configuration files (implies -l).
 343  * -d, --docfiles       List only documentation files (implies -l).
 344  * -L, --licensefiles   List only license files (implies -l).
 345  * --dump       Dump file information as follows (implies -l):
 346  *              path size mtime digest mode owner group isconfig isdoc rdev symlink
 347  * -s, --state  Display the states of files in the package (implies -l).
 348  *              The state of each file is one of normal, not installed, or replaced.
 349  *
 350  * Looks like we can switch to getopt32 here: in practice, people
 351  * do place -q first if they intend to use it (misinterpreting "-piq" wouldn't matter).
 352  */
 353 int rpm_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 354 int rpm_main(int argc, char **argv)
 355 {
 356         int opt, func = 0;
 357
 358         INIT_G();
 359         G.pagesize = getpagesize();
 360
 361         while ((opt = getopt(argc, argv, "iqpldc")) != -1) {
 362                 switch (opt) {
 363                 case 'i': /* First arg: Install mode, with q: Information */
 364                         if (!func) func = rpm_install;
 365                         else func |= rpm_query_info;
 366                         break;
 367                 case 'q': /* First arg: Query mode */
 368                         if (func) bb_show_usage();
 369                         func = rpm_query;
 370                         break;
 371                 case 'p': /* Query a package (IOW: .rpm file, we are not querying RPMDB) */
 372                         func |= rpm_query_package;
 373                         break;
 374                 case 'l': /* List files in a package */
 375                         func |= rpm_query_list;
 376                         break;
 377                 case 'd': /* List doc files in a package (implies -l) */
 378                         func |= rpm_query_list;
 379                         func |= rpm_query_list_doc;
 380                         break;
 381                 case 'c': /* List config files in a package (implies -l) */
 382                         func |= rpm_query_list;
 383                         func |= rpm_query_list_config;
 384                         break;
 385                 default:
 386                         bb_show_usage();
 387                 }
 388         }
 389         argv += optind;
 390         //argc -= optind;
 391         if (!argv[0]) {
 392                 bb_show_usage();
 393         }
 394
 395         for (;;) {
 396                 int rpm_fd;
 397                 const char *source_rpm;
 398
 399                 rpm_fd = rpm_gettags(*argv);
 400                 print_all_tags();
 401
 402                 source_rpm = rpm_getstr0(TAG_SOURCERPM);
 403
 404                 if (func & rpm_install) {
 405                         /* -i (and not -qi) */
 406
 407                         /* Backup any config files */
 408                         loop_through_files(TAG_BASENAMES, fileaction_dobackup);
 409                         /* Extact the archive */
 410                         extract_cpio(rpm_fd, source_rpm);
 411                         /* Set the correct file uid/gid's */
 412                         loop_through_files(TAG_BASENAMES, fileaction_setowngrp);
 413                 }
 414                 else
 415                 if ((func & (rpm_query|rpm_query_package)) == (rpm_query|rpm_query_package)) {
 416                         /* -qp */
 417
 418                         if (!(func & (rpm_query_info|rpm_query_list))) {
 419                                 /* If just a straight query, just give package name */
 420                                 printf("%s-%s-%s\n", rpm_getstr0(TAG_NAME), rpm_getstr0(TAG_VERSION), rpm_getstr0(TAG_RELEASE));
 421                         }
 422                         if (func & rpm_query_info) {
 423                                 /* Do the nice printout */
 424                                 time_t bdate_time;
 425                                 struct tm *bdate_ptm;
 426                                 char bdatestring[50];
 427                                 const char *p;
 428
 429                                 printf("%-12s: %s\n", "Name"        , rpm_getstr0(TAG_NAME));
 430                                 /* TODO compat: add "Epoch" here */
 431                                 printf("%-12s: %s\n", "Version"     , rpm_getstr0(TAG_VERSION));
 432                                 printf("%-12s: %s\n", "Release"     , rpm_getstr0(TAG_RELEASE));
 433                                 /* add "Architecture" */
 434                                 /* printf("%-12s: %s\n", "Install Date", "(not installed)"); - we don't know */
 435                                 printf("%-12s: %s\n", "Group"       , rpm_getstr0(TAG_GROUP));
 436                                 printf("%-12s: %d\n", "Size"        , rpm_getint(TAG_SIZE, 0));
 437                                 printf("%-12s: %s\n", "License"     , rpm_getstr0(TAG_LICENSE));
 438                                 /* add "Signature" */
 439                                 printf("%-12s: %s\n", "Source RPM"  , source_rpm ? source_rpm : "(none)");
 440                                 bdate_time = rpm_getint(TAG_BUILDTIME, 0);
 441                                 bdate_ptm = localtime(&bdate_time);
 442                                 strftime(bdatestring, 50, "%a %d %b %Y %T %Z", bdate_ptm);
 443                                 printf("%-12s: %s\n", "Build Date"  , bdatestring);
 444                                 printf("%-12s: %s\n", "Build Host"  , rpm_getstr0(TAG_BUILDHOST));
 445                                 p = rpm_getstr0(TAG_PREFIXS);
 446                                 printf("%-12s: %s\n", "Relocations" , p ? p : "(not relocatable)");
 447                                 /* add "Packager" */
 448                                 p = rpm_getstr0(TAG_VENDOR);
 449                                 if (p) /* rpm 4.13.0.1 does not show "(none)" for Vendor: */
 450                                 printf("%-12s: %s\n", "Vendor"      , p);
 451                                 p = rpm_getstr0(TAG_URL);
 452                                 if (p) /* rpm 4.13.0.1 does not show "(none)"/"(null)" for URL: */
 453                                 printf("%-12s: %s\n", "URL"         , p);
 454                                 printf("%-12s: %s\n", "Summary"     , rpm_getstr0(TAG_SUMMARY));
 455                                 printf("Description :\n%s\n", rpm_getstr0(TAG_DESCRIPTION));
 456                         }
 457                         if (func & rpm_query_list) {
 458                                 int count, it, flags;
 459                                 count = rpm_getcount(TAG_BASENAMES);
 460                                 for (it = 0; it < count; it++) {
 461                                         flags = rpm_getint(TAG_FILEFLAGS, it);
 462                                         switch (func & (rpm_query_list_doc|rpm_query_list_config)) {
 463                                         case rpm_query_list_doc:
 464                                                 if (!(flags & RPMFILE_DOC)) continue;
 465                                                 break;
 466                                         case rpm_query_list_config:
 467                                                 if (!(flags & RPMFILE_CONFIG)) continue;
 468                                                 break;
 469                                         case rpm_query_list_doc|rpm_query_list_config:
 470                                                 if (!(flags & (RPMFILE_CONFIG|RPMFILE_DOC))) continue;
 471                                                 break;
 472                                         }
 473                                         printf("%s%s\n",
 474                                                 rpm_getstr(TAG_DIRNAMES, rpm_getint(TAG_DIRINDEXES, it)),
 475                                                 rpm_getstr(TAG_BASENAMES, it));
 476                                 }
 477                         }
 478                 } else {
 479                         /* Unsupported (help text shows what we support) */
 480                         bb_show_usage();
 481                 }
 482                 if (!*++argv)
 483                         break;
 484                 munmap(G.map, G.mapsize);
 485                 free(G.mytags);
 486                 close(rpm_fd);
 487         }
 488
 489         return 0;
 490 }
 491
 492 #endif /* RPM */
 493
 494 /*
 495  * Mini rpm2cpio implementation for busybox
 496  *
 497  * Copyright (C) 2001 by Laurence Anderson
 498  *
 499  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
 500  */
 501 //config:config RPM2CPIO
 502 //config:       bool "rpm2cpio (21 kb)"
 503 //config:       default y
 504 //config:       help
 505 //config:       Converts a RPM file into a CPIO archive.
 506
 507 //applet:IF_RPM2CPIO(APPLET(rpm2cpio, BB_DIR_USR_BIN, BB_SUID_DROP))
 508
 509 //kbuild:lib-$(CONFIG_RPM2CPIO) += rpm.o
 510
 511 //usage:#define rpm2cpio_trivial_usage
 512 //usage:       "PACKAGE.rpm"
 513 //usage:#define rpm2cpio_full_usage "\n\n"
 514 //usage:       "Output a cpio archive of the rpm file"
 515
 516 #if ENABLE_RPM2CPIO
 517
 518 /* No getopt required */
 519 int rpm2cpio_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 520 int rpm2cpio_main(int argc UNUSED_PARAM, char **argv)
 521 {
 522         const char *str;
 523         int rpm_fd;
 524
 525         INIT_G();
 526         G.pagesize = getpagesize();
 527
 528         rpm_fd = rpm_gettags(argv[1]);
 529
 530         //if (SEAMLESS_COMPRESSION) - we do this at the end instead.
 531         //      /* We need to know whether child (gzip/bzip/etc) exits abnormally */
 532         //      signal(SIGCHLD, check_errors_in_children);
 533
 534         if (ENABLE_FEATURE_SEAMLESS_LZMA
 535          && (str = rpm_getstr0(TAG_PAYLOADCOMPRESSOR)) != NULL
 536          && strcmp(str, "lzma") == 0
 537         ) {
 538                 // lzma compression can't be detected
 539                 // set up decompressor without detection
 540                 setup_lzma_on_fd(rpm_fd);
 541         } else {
 542                 setup_unzip_on_fd(rpm_fd, /*fail_if_not_compressed:*/ 1);
 543         }
 544
 545         if (bb_copyfd_eof(rpm_fd, STDOUT_FILENO) < 0)
 546                 bb_simple_error_msg_and_die("error unpacking");
 547
 548         if (ENABLE_FEATURE_CLEAN_UP) {
 549                 close(rpm_fd);
 550         }
 551
 552         if (SEAMLESS_COMPRESSION) {
 553                 check_errors_in_children(0);
 554                 return bb_got_signal;
 555         }
 556         return EXIT_SUCCESS;
 557 }
 558
 559 #endif /* RPM2CPIO */