busybox/archival/rpm.c
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   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;
  87        IF_VARIABLE_ARCH_PAGESIZE(unsigned pagesize;)
  88#define G_pagesize cached_pagesize(G.pagesize)
  89} FIX_ALIASING;
  90#define G (*(struct globals*)bb_common_bufsiz1)
  91#define INIT_G() do { setup_common_bufsiz(); } while (0)
  92
  93static int rpm_gettags(const char *filename)
  94{
  95        rpm_index *tags;
  96        int fd;
  97        unsigned pass, idx;
  98        unsigned storepos;
  99
 100        if (!filename) { /* rpm2cpio w/o filename? */
 101                filename = bb_msg_standard_output;
 102                fd = 0;
 103        } else {
 104                fd = xopen(filename, O_RDONLY);
 105        }
 106
 107        storepos = xlseek(fd, 96, SEEK_CUR); /* Seek past the unused lead */
 108        G.tagcount = 0;
 109        tags = NULL;
 110        idx = 0;
 111        /* 1st pass is the signature headers, 2nd is the main stuff */
 112        for (pass = 0; pass < 2; pass++) {
 113                struct rpm_header header;
 114                unsigned cnt;
 115
 116                xread(fd, &header, sizeof(header));
 117                if (header.magic_and_ver != htonl(RPM_HEADER_MAGICnVER))
 118                        bb_error_msg_and_die("invalid RPM header magic in '%s'", filename);
 119                header.size = ntohl(header.size);
 120                cnt = ntohl(header.entries);
 121                storepos += sizeof(header) + cnt * 16;
 122
 123                G.tagcount += cnt;
 124                tags = xrealloc(tags, sizeof(tags[0]) * G.tagcount);
 125                xread(fd, &tags[idx], sizeof(tags[0]) * cnt);
 126                while (cnt--) {
 127                        rpm_index *tag = &tags[idx];
 128                        tag->tag = ntohl(tag->tag);
 129                        tag->type = ntohl(tag->type);
 130                        tag->count = ntohl(tag->count);
 131                        tag->offset = storepos + ntohl(tag->offset);
 132                        if (pass == 0)
 133                                tag->tag -= 743;
 134                        idx++;
 135                }
 136                /* Skip padding to 8 byte boundary after reading signature headers */
 137                if (pass == 0)
 138                        while (header.size & 7)
 139                                header.size++;
 140                /* Seek past store */
 141                storepos = xlseek(fd, header.size, SEEK_CUR);
 142        }
 143        G.mytags = tags;
 144
 145        /* Map the store */
 146        storepos = (storepos + G_pagesize) & -(int)G_pagesize;
 147        /* remember size for munmap */
 148        G.mapsize = storepos;
 149        /* some NOMMU systems prefer MAP_PRIVATE over MAP_SHARED */
 150        G.map = mmap_read(fd, storepos);
 151        if (G.map == MAP_FAILED)
 152                bb_perror_msg_and_die("mmap '%s'", filename);
 153
 154        return fd;
 155}
 156
 157static int bsearch_rpmtag(const void *key, const void *item)
 158{
 159        int *tag = (int *)key;
 160        rpm_index *tmp = (rpm_index *) item;
 161        return (*tag - tmp->tag);
 162}
 163
 164static char *rpm_getstr(int tag, int itemindex)
 165{
 166        rpm_index *found;
 167        found = bsearch(&tag, G.mytags, G.tagcount, sizeof(G.mytags[0]), bsearch_rpmtag);
 168        if (!found || itemindex >= found->count)
 169                return NULL;
 170        if (found->type == RPM_STRING_TYPE
 171         || found->type == RPM_I18NSTRING_TYPE
 172         || found->type == RPM_STRING_ARRAY_TYPE
 173        ) {
 174                int n;
 175                char *tmpstr = (char *) G.map + found->offset;
 176                for (n = 0; n < itemindex; n++)
 177                        tmpstr = tmpstr + strlen(tmpstr) + 1;
 178                return tmpstr;
 179        }
 180        return NULL;
 181}
 182static char *rpm_getstr0(int tag)
 183{
 184        return rpm_getstr(tag, 0);
 185}
 186
 187#if ENABLE_RPM
 188
 189static int rpm_getint(int tag, int itemindex)
 190{
 191        rpm_index *found;
 192        char *tmpint;
 193
 194        /* gcc throws warnings here when sizeof(void*)!=sizeof(int) ...
 195         * it's ok to ignore it because tag won't be used as a pointer */
 196        found = bsearch(&tag, G.mytags, G.tagcount, sizeof(G.mytags[0]), bsearch_rpmtag);
 197        if (!found || itemindex >= found->count)
 198                return -1;
 199
 200        tmpint = (char *) G.map + found->offset;
 201        if (found->type == RPM_INT32_TYPE) {
 202                tmpint += itemindex*4;
 203                return ntohl(*(int32_t*)tmpint);
 204        }
 205        if (found->type == RPM_INT16_TYPE) {
 206                tmpint += itemindex*2;
 207                return ntohs(*(int16_t*)tmpint);
 208        }
 209        if (found->type == RPM_INT8_TYPE) {
 210                tmpint += itemindex;
 211                return *(int8_t*)tmpint;
 212        }
 213        return -1;
 214}
 215
 216static int rpm_getcount(int tag)
 217{
 218        rpm_index *found;
 219        found = bsearch(&tag, G.mytags, G.tagcount, sizeof(G.mytags[0]), bsearch_rpmtag);
 220        if (!found)
 221                return 0;
 222        return found->count;
 223}
 224
 225static void fileaction_dobackup(char *filename, int fileref)
 226{
 227        struct stat oldfile;
 228        int stat_res;
 229        char *newname;
 230        if (rpm_getint(TAG_FILEFLAGS, fileref) & RPMFILE_CONFIG) {
 231                /* Only need to backup config files */
 232                stat_res = lstat(filename, &oldfile);
 233                if (stat_res == 0 && S_ISREG(oldfile.st_mode)) {
 234                        /* File already exists  - really should check MD5's etc to see if different */
 235                        newname = xasprintf("%s.rpmorig", filename);
 236                        copy_file(filename, newname, FILEUTILS_RECUR | FILEUTILS_PRESERVE_STATUS);
 237                        remove_file(filename, FILEUTILS_RECUR | FILEUTILS_FORCE);
 238                        free(newname);
 239                }
 240        }
 241}
 242
 243static void fileaction_setowngrp(char *filename, int fileref)
 244{
 245        /* real rpm warns: "user foo does not exist - using <you>" */
 246        struct passwd *pw = getpwnam(rpm_getstr(TAG_FILEUSERNAME, fileref));
 247        int uid = pw ? pw->pw_uid : getuid(); /* or euid? */
 248        struct group *gr = getgrnam(rpm_getstr(TAG_FILEGROUPNAME, fileref));
 249        int gid = gr ? gr->gr_gid : getgid();
 250        chown(filename, uid, gid);
 251}
 252
 253static void loop_through_files(int filetag, void (*fileaction)(char *filename, int fileref))
 254{
 255        int count = 0;
 256        while (rpm_getstr(filetag, count)) {
 257                char* filename = xasprintf("%s%s",
 258                        rpm_getstr(TAG_DIRNAMES, rpm_getint(TAG_DIRINDEXES, count)),
 259                        rpm_getstr(TAG_BASENAMES, count));
 260                fileaction(filename, count++);
 261                free(filename);
 262        }
 263}
 264
 265#if 0 //DEBUG
 266static void print_all_tags(void)
 267{
 268        unsigned i = 0;
 269        while (i < G.tagcount) {
 270                rpm_index *tag = &G.mytags[i];
 271                if (tag->type == RPM_STRING_TYPE
 272                 || tag->type == RPM_I18NSTRING_TYPE
 273                 || tag->type == RPM_STRING_ARRAY_TYPE
 274                ) {
 275                        unsigned n;
 276                        char *str = (char *) G.map + tag->offset;
 277
 278                        printf("tag[%u] %08x type %08x offset %08x count %d '%s'\n",
 279                                i, tag->tag, tag->type, tag->offset, tag->count, str
 280                        );
 281                        for (n = 1; n < tag->count; n++) {
 282                                str += strlen(str) + 1;
 283                                printf("\t'%s'\n", str);
 284                        }
 285                }
 286                i++;
 287        }
 288}
 289#else
 290#define print_all_tags() ((void)0)
 291#endif
 292
 293static void extract_cpio(int fd, const char *source_rpm)
 294{
 295        archive_handle_t *archive_handle;
 296
 297        if (source_rpm != NULL) {
 298                /* Binary rpm (it was built from some SRPM), install to root */
 299                xchdir("/");
 300        } /* else: SRPM, install to current dir */
 301
 302        /* Initialize */
 303        archive_handle = init_handle();
 304        archive_handle->seek = seek_by_read;
 305        archive_handle->action_data = data_extract_all;
 306#if 0 /* For testing (rpm -i only lists the files in internal cpio): */
 307        archive_handle->action_header = header_list;
 308        archive_handle->action_data = data_skip;
 309#endif
 310        archive_handle->ah_flags = ARCHIVE_RESTORE_DATE | ARCHIVE_CREATE_LEADING_DIRS
 311                /* compat: overwrite existing files.
 312                 * try "rpm -i foo.src.rpm" few times in a row -
 313                 * standard rpm will not complain.
 314                 */
 315                | ARCHIVE_REPLACE_VIA_RENAME;
 316        archive_handle->src_fd = fd;
 317        /*archive_handle->offset = 0; - init_handle() did it */
 318
 319        setup_unzip_on_fd(archive_handle->src_fd, /*fail_if_not_compressed:*/ 1);
 320        while (get_header_cpio(archive_handle) == EXIT_SUCCESS)
 321                continue;
 322}
 323
 324//usage:#define rpm_trivial_usage
 325//usage:       "-i PACKAGE.rpm; rpm -qp[ildc] PACKAGE.rpm"
 326//usage:#define rpm_full_usage "\n\n"
 327//usage:       "Manipulate RPM packages\n"
 328//usage:     "\nCommands:"
 329//usage:     "\n        -i      Install package"
 330//usage:     "\n        -qp     Query package"
 331//usage:     "\n        -qpi    Show information"
 332//usage:     "\n        -qpl    List contents"
 333//usage:     "\n        -qpd    List documents"
 334//usage:     "\n        -qpc    List config files"
 335
 336/* RPM version 4.13.0.1:
 337 * Unlike -q, -i seems to imply -p: -i, -ip and -pi work the same.
 338 * OTOH, with -q order is important: "-piq FILE.rpm" works as -qp, not -qpi
 339 * (IOW: shows only package name, not package info).
 340 * "-iq ARG" works as -q: treats ARG as package name, not a file.
 341 *
 342 * "man rpm" on -l option and options implying it:
 343 * -l, --list           List files in package.
 344 * -c, --configfiles    List only configuration files (implies -l).
 345 * -d, --docfiles       List only documentation files (implies -l).
 346 * -L, --licensefiles   List only license files (implies -l).
 347 * --dump       Dump file information as follows (implies -l):
 348 *              path size mtime digest mode owner group isconfig isdoc rdev symlink
 349 * -s, --state  Display the states of files in the package (implies -l).
 350 *              The state of each file is one of normal, not installed, or replaced.
 351 *
 352 * Looks like we can switch to getopt32 here: in practice, people
 353 * do place -q first if they intend to use it (misinterpreting "-piq" wouldn't matter).
 354 */
 355int rpm_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 356int rpm_main(int argc, char **argv)
 357{
 358        int opt, func = 0;
 359
 360        INIT_G();
 361        INIT_PAGESIZE(G.pagesize);
 362
 363        while ((opt = getopt(argc, argv, "iqpldc")) != -1) {
 364                switch (opt) {
 365                case 'i': /* First arg: Install mode, with q: Information */
 366                        if (!func) func = rpm_install;
 367                        else func |= rpm_query_info;
 368                        break;
 369                case 'q': /* First arg: Query mode */
 370                        if (func) bb_show_usage();
 371                        func = rpm_query;
 372                        break;
 373                case 'p': /* Query a package (IOW: .rpm file, we are not querying RPMDB) */
 374                        func |= rpm_query_package;
 375                        break;
 376                case 'l': /* List files in a package */
 377                        func |= rpm_query_list;
 378                        break;
 379                case 'd': /* List doc files in a package (implies -l) */
 380                        func |= rpm_query_list;
 381                        func |= rpm_query_list_doc;
 382                        break;
 383                case 'c': /* List config files in a package (implies -l) */
 384                        func |= rpm_query_list;
 385                        func |= rpm_query_list_config;
 386                        break;
 387                default:
 388                        bb_show_usage();
 389                }
 390        }
 391        argv += optind;
 392        //argc -= optind;
 393        if (!argv[0]) {
 394                bb_show_usage();
 395        }
 396
 397        for (;;) {
 398                int rpm_fd;
 399                const char *source_rpm;
 400
 401                rpm_fd = rpm_gettags(*argv);
 402                print_all_tags();
 403
 404                source_rpm = rpm_getstr0(TAG_SOURCERPM);
 405
 406                if (func & rpm_install) {
 407                        /* -i (and not -qi) */
 408
 409                        /* Backup any config files */
 410                        loop_through_files(TAG_BASENAMES, fileaction_dobackup);
 411                        /* Extact the archive */
 412                        extract_cpio(rpm_fd, source_rpm);
 413                        /* Set the correct file uid/gid's */
 414                        loop_through_files(TAG_BASENAMES, fileaction_setowngrp);
 415                }
 416                else
 417                if ((func & (rpm_query|rpm_query_package)) == (rpm_query|rpm_query_package)) {
 418                        /* -qp */
 419
 420                        if (!(func & (rpm_query_info|rpm_query_list))) {
 421                                /* If just a straight query, just give package name */
 422                                printf("%s-%s-%s\n", rpm_getstr0(TAG_NAME), rpm_getstr0(TAG_VERSION), rpm_getstr0(TAG_RELEASE));
 423                        }
 424                        if (func & rpm_query_info) {
 425                                /* Do the nice printout */
 426                                time_t bdate_time;
 427                                struct tm *bdate_ptm;
 428                                char bdatestring[50];
 429                                const char *p;
 430
 431                                printf("%-12s: %s\n", "Name"        , rpm_getstr0(TAG_NAME));
 432                                /* TODO compat: add "Epoch" here */
 433                                printf("%-12s: %s\n", "Version"     , rpm_getstr0(TAG_VERSION));
 434                                printf("%-12s: %s\n", "Release"     , rpm_getstr0(TAG_RELEASE));
 435                                /* add "Architecture" */
 436                                /* printf("%-12s: %s\n", "Install Date", "(not installed)"); - we don't know */
 437                                printf("%-12s: %s\n", "Group"       , rpm_getstr0(TAG_GROUP));
 438                                printf("%-12s: %d\n", "Size"        , rpm_getint(TAG_SIZE, 0));
 439                                printf("%-12s: %s\n", "License"     , rpm_getstr0(TAG_LICENSE));
 440                                /* add "Signature" */
 441                                printf("%-12s: %s\n", "Source RPM"  , source_rpm ? source_rpm : "(none)");
 442                                bdate_time = rpm_getint(TAG_BUILDTIME, 0);
 443                                bdate_ptm = localtime(&bdate_time);
 444                                strftime(bdatestring, 50, "%a %d %b %Y %T %Z", bdate_ptm);
 445                                printf("%-12s: %s\n", "Build Date"  , bdatestring);
 446                                printf("%-12s: %s\n", "Build Host"  , rpm_getstr0(TAG_BUILDHOST));
 447                                p = rpm_getstr0(TAG_PREFIXS);
 448                                printf("%-12s: %s\n", "Relocations" , p ? p : "(not relocatable)");
 449                                /* add "Packager" */
 450                                p = rpm_getstr0(TAG_VENDOR);
 451                                if (p) /* rpm 4.13.0.1 does not show "(none)" for Vendor: */
 452                                printf("%-12s: %s\n", "Vendor"      , p);
 453                                p = rpm_getstr0(TAG_URL);
 454                                if (p) /* rpm 4.13.0.1 does not show "(none)"/"(null)" for URL: */
 455                                printf("%-12s: %s\n", "URL"         , p);
 456                                printf("%-12s: %s\n", "Summary"     , rpm_getstr0(TAG_SUMMARY));
 457                                printf("Description :\n%s\n", rpm_getstr0(TAG_DESCRIPTION));
 458                        }
 459                        if (func & rpm_query_list) {
 460                                int count, it, flags;
 461                                count = rpm_getcount(TAG_BASENAMES);
 462                                for (it = 0; it < count; it++) {
 463                                        flags = rpm_getint(TAG_FILEFLAGS, it);
 464                                        switch (func & (rpm_query_list_doc|rpm_query_list_config)) {
 465                                        case rpm_query_list_doc:
 466                                                if (!(flags & RPMFILE_DOC)) continue;
 467                                                break;
 468                                        case rpm_query_list_config:
 469                                                if (!(flags & RPMFILE_CONFIG)) continue;
 470                                                break;
 471                                        case rpm_query_list_doc|rpm_query_list_config:
 472                                                if (!(flags & (RPMFILE_CONFIG|RPMFILE_DOC))) continue;
 473                                                break;
 474                                        }
 475                                        printf("%s%s\n",
 476                                                rpm_getstr(TAG_DIRNAMES, rpm_getint(TAG_DIRINDEXES, it)),
 477                                                rpm_getstr(TAG_BASENAMES, it));
 478                                }
 479                        }
 480                } else {
 481                        /* Unsupported (help text shows what we support) */
 482                        bb_show_usage();
 483                }
 484                if (!*++argv)
 485                        break;
 486                munmap(G.map, G.mapsize);
 487                free(G.mytags);
 488                close(rpm_fd);
 489        }
 490
 491        return 0;
 492}
 493
 494#endif /* RPM */
 495
 496/*
 497 * Mini rpm2cpio implementation for busybox
 498 *
 499 * Copyright (C) 2001 by Laurence Anderson
 500 *
 501 * Licensed under GPLv2 or later, see file LICENSE in this source tree.
 502 */
 503//config:config RPM2CPIO
 504//config:       bool "rpm2cpio (21 kb)"
 505//config:       default y
 506//config:       help
 507//config:       Converts a RPM file into a CPIO archive.
 508
 509//applet:IF_RPM2CPIO(APPLET(rpm2cpio, BB_DIR_USR_BIN, BB_SUID_DROP))
 510
 511//kbuild:lib-$(CONFIG_RPM2CPIO) += rpm.o
 512
 513//usage:#define rpm2cpio_trivial_usage
 514//usage:       "PACKAGE.rpm"
 515//usage:#define rpm2cpio_full_usage "\n\n"
 516//usage:       "Output a cpio archive of the rpm file"
 517
 518#if ENABLE_RPM2CPIO
 519
 520/* No getopt required */
 521int rpm2cpio_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 522int rpm2cpio_main(int argc UNUSED_PARAM, char **argv)
 523{
 524        const char *str;
 525        int rpm_fd;
 526
 527        INIT_G();
 528        INIT_PAGESIZE(G.pagesize);
 529
 530        rpm_fd = rpm_gettags(argv[1]);
 531
 532        //if (SEAMLESS_COMPRESSION) - we do this at the end instead.
 533        //      /* We need to know whether child (gzip/bzip/etc) exits abnormally */
 534        //      signal(SIGCHLD, check_errors_in_children);
 535
 536        if (ENABLE_FEATURE_SEAMLESS_LZMA
 537         && (str = rpm_getstr0(TAG_PAYLOADCOMPRESSOR)) != NULL
 538         && strcmp(str, "lzma") == 0
 539        ) {
 540                // lzma compression can't be detected
 541                // set up decompressor without detection
 542                setup_lzma_on_fd(rpm_fd);
 543        } else {
 544                setup_unzip_on_fd(rpm_fd, /*fail_if_not_compressed:*/ 1);
 545        }
 546
 547        if (bb_copyfd_eof(rpm_fd, STDOUT_FILENO) < 0)
 548                bb_simple_error_msg_and_die("error unpacking");
 549
 550        if (ENABLE_FEATURE_CLEAN_UP) {
 551                close(rpm_fd);
 552        }
 553
 554        if (SEAMLESS_COMPRESSION) {
 555                check_errors_in_children(0);
 556                return bb_got_signal;
 557        }
 558        return EXIT_SUCCESS;
 559}
 560
 561#endif /* RPM2CPIO */
 562
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