LXR busybox/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
  65enum 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
  75typedef 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
  82struct 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
  91static 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
 155static 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
 162static 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}
 180static char *rpm_getstr0(int tag)
 181{
 182        return rpm_getstr(tag, 0);
 183}
 184
 185#if ENABLE_RPM
 186
 187static 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
 214static 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
 223static 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
 241static 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
 251static 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
 264static 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
 291static 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 */
 353int rpm_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 354int 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 */
 519int rpm2cpio_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 520int 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_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 */
 560