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