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
  10 //config:config RPM
  11 //config:       bool "rpm"
  12 //config:       default y
  13 //config:       help
  14 //config:         Mini RPM applet - queries and extracts RPM packages.
  15
  16 //applet:IF_RPM(APPLET(rpm, BB_DIR_BIN, BB_SUID_DROP))
  17 //kbuild:lib-$(CONFIG_RPM) += rpm.o
  18
  19 //usage:#define rpm_trivial_usage
  20 //usage:       "-i PACKAGE.rpm; rpm -qp[ildc] PACKAGE.rpm"
  21 //usage:#define rpm_full_usage "\n\n"
  22 //usage:       "Manipulate RPM packages\n"
  23 //usage:     "\nCommands:"
  24 //usage:     "\n        -i      Install package"
  25 //usage:     "\n        -qp     Query package"
  26 //usage:     "\n        -qpi    Show information"
  27 //usage:     "\n        -qpl    List contents"
  28 //usage:     "\n        -qpd    List documents"
  29 //usage:     "\n        -qpc    List config files"
  30
  31 #include "libbb.h"
  32 #include "bb_archive.h"
  33 #include "rpm.h"
  34
  35 #define RPM_CHAR_TYPE           1
  36 #define RPM_INT8_TYPE           2
  37 #define RPM_INT16_TYPE          3
  38 #define RPM_INT32_TYPE          4
  39 /* #define RPM_INT64_TYPE       5   ---- These aren't supported (yet) */
  40 #define RPM_STRING_TYPE         6
  41 #define RPM_BIN_TYPE            7
  42 #define RPM_STRING_ARRAY_TYPE   8
  43 #define RPM_I18NSTRING_TYPE     9
  44
  45 #define TAG_NAME                1000
  46 #define TAG_VERSION             1001
  47 #define TAG_RELEASE             1002
  48 #define TAG_SUMMARY             1004
  49 #define TAG_DESCRIPTION         1005
  50 #define TAG_BUILDTIME           1006
  51 #define TAG_BUILDHOST           1007
  52 #define TAG_SIZE                1009
  53 #define TAG_VENDOR              1011
  54 #define TAG_LICENSE             1014
  55 #define TAG_PACKAGER            1015
  56 #define TAG_GROUP               1016
  57 #define TAG_URL                 1020
  58 #define TAG_PREIN               1023
  59 #define TAG_POSTIN              1024
  60 #define TAG_FILEFLAGS           1037
  61 #define TAG_FILEUSERNAME        1039
  62 #define TAG_FILEGROUPNAME       1040
  63 #define TAG_SOURCERPM           1044
  64 #define TAG_PREINPROG           1085
  65 #define TAG_POSTINPROG          1086
  66 #define TAG_PREFIXS             1098
  67 #define TAG_DIRINDEXES          1116
  68 #define TAG_BASENAMES           1117
  69 #define TAG_DIRNAMES            1118
  70
  71 #define RPMFILE_CONFIG          (1 << 0)
  72 #define RPMFILE_DOC             (1 << 1)
  73
  74 enum rpm_functions_e {
  75         rpm_query = 1,
  76         rpm_install = 2,
  77         rpm_query_info = 4,
  78         rpm_query_package = 8,
  79         rpm_query_list = 16,
  80         rpm_query_list_doc = 32,
  81         rpm_query_list_config = 64
  82 };
  83
  84 typedef struct {
  85         uint32_t tag; /* 4 byte tag */
  86         uint32_t type; /* 4 byte type */
  87         uint32_t offset; /* 4 byte offset */
  88         uint32_t count; /* 4 byte count */
  89 } rpm_index;
  90
  91 struct globals {
  92         void *map;
  93         rpm_index **mytags;
  94         int tagcount;
  95 } FIX_ALIASING;
  96 #define G (*(struct globals*)&bb_common_bufsiz1)
  97 #define INIT_G() do { } while (0)
  98
  99 static void extract_cpio(int fd, const char *source_rpm)
 100 {
 101         archive_handle_t *archive_handle;
 102
 103         if (source_rpm != NULL) {
 104                 /* Binary rpm (it was built from some SRPM), install to root */
 105                 xchdir("/");
 106         } /* else: SRPM, install to current dir */
 107
 108         /* Initialize */
 109         archive_handle = init_handle();
 110         archive_handle->seek = seek_by_read;
 111         archive_handle->action_data = data_extract_all;
 112 #if 0 /* For testing (rpm -i only lists the files in internal cpio): */
 113         archive_handle->action_header = header_list;
 114         archive_handle->action_data = data_skip;
 115 #endif
 116         archive_handle->ah_flags = ARCHIVE_RESTORE_DATE | ARCHIVE_CREATE_LEADING_DIRS
 117                 /* compat: overwrite existing files.
 118                  * try "rpm -i foo.src.rpm" few times in a row -
 119                  * standard rpm will not complain.
 120                  */
 121                 | ARCHIVE_REPLACE_VIA_RENAME;
 122         archive_handle->src_fd = fd;
 123         /*archive_handle->offset = 0; - init_handle() did it */
 124
 125         setup_unzip_on_fd(archive_handle->src_fd, /*fail_if_not_detected:*/ 1);
 126         while (get_header_cpio(archive_handle) == EXIT_SUCCESS)
 127                 continue;
 128 }
 129
 130 static rpm_index **rpm_gettags(int fd, int *num_tags)
 131 {
 132         /* We should never need more than 200 (shrink via realloc later) */
 133         rpm_index **tags = xzalloc(200 * sizeof(tags[0]));
 134         int pass, tagindex = 0;
 135
 136         xlseek(fd, 96, SEEK_CUR); /* Seek past the unused lead */
 137
 138         /* 1st pass is the signature headers, 2nd is the main stuff */
 139         for (pass = 0; pass < 2; pass++) {
 140                 struct rpm_header header;
 141                 rpm_index *tmpindex;
 142                 int storepos;
 143
 144                 xread(fd, &header, sizeof(header));
 145                 if (header.magic_and_ver != htonl(RPM_HEADER_MAGICnVER))
 146                         return NULL; /* Invalid magic, or not version 1 */
 147                 header.size = ntohl(header.size);
 148                 header.entries = ntohl(header.entries);
 149                 storepos = xlseek(fd, 0, SEEK_CUR) + header.entries * 16;
 150
 151                 while (header.entries--) {
 152                         tmpindex = tags[tagindex++] = xmalloc(sizeof(*tmpindex));
 153                         xread(fd, tmpindex, sizeof(*tmpindex));
 154                         tmpindex->tag = ntohl(tmpindex->tag);
 155                         tmpindex->type = ntohl(tmpindex->type);
 156                         tmpindex->count = ntohl(tmpindex->count);
 157                         tmpindex->offset = storepos + ntohl(tmpindex->offset);
 158                         if (pass == 0)
 159                                 tmpindex->tag -= 743;
 160                 }
 161                 storepos = xlseek(fd, header.size, SEEK_CUR); /* Seek past store */
 162                 /* Skip padding to 8 byte boundary after reading signature headers */
 163                 if (pass == 0)
 164                         xlseek(fd, (-storepos) & 0x7, SEEK_CUR);
 165         }
 166         /* realloc tags to save space */
 167         tags = xrealloc(tags, tagindex * sizeof(tags[0]));
 168         *num_tags = tagindex;
 169         /* All done, leave the file at the start of the gzipped cpio archive */
 170         return tags;
 171 }
 172
 173 static int bsearch_rpmtag(const void *key, const void *item)
 174 {
 175         int *tag = (int *)key;
 176         rpm_index **tmp = (rpm_index **) item;
 177         return (*tag - tmp[0]->tag);
 178 }
 179
 180 static int rpm_getcount(int tag)
 181 {
 182         rpm_index **found;
 183         found = bsearch(&tag, G.mytags, G.tagcount, sizeof(struct rpmtag *), bsearch_rpmtag);
 184         if (!found)
 185                 return 0;
 186         return found[0]->count;
 187 }
 188
 189 static char *rpm_getstr(int tag, int itemindex)
 190 {
 191         rpm_index **found;
 192         found = bsearch(&tag, G.mytags, G.tagcount, sizeof(struct rpmtag *), bsearch_rpmtag);
 193         if (!found || itemindex >= found[0]->count)
 194                 return NULL;
 195         if (found[0]->type == RPM_STRING_TYPE
 196          || found[0]->type == RPM_I18NSTRING_TYPE
 197          || found[0]->type == RPM_STRING_ARRAY_TYPE
 198         ) {
 199                 int n;
 200                 char *tmpstr = (char *) G.map + found[0]->offset;
 201                 for (n = 0; n < itemindex; n++)
 202                         tmpstr = tmpstr + strlen(tmpstr) + 1;
 203                 return tmpstr;
 204         }
 205         return NULL;
 206 }
 207
 208 static int rpm_getint(int tag, int itemindex)
 209 {
 210         rpm_index **found;
 211         char *tmpint;
 212
 213         /* gcc throws warnings here when sizeof(void*)!=sizeof(int) ...
 214          * it's ok to ignore it because tag won't be used as a pointer */
 215         found = bsearch(&tag, G.mytags, G.tagcount, sizeof(struct rpmtag *), bsearch_rpmtag);
 216         if (!found || itemindex >= found[0]->count)
 217                 return -1;
 218
 219         tmpint = (char *) G.map + found[0]->offset;
 220         if (found[0]->type == RPM_INT32_TYPE) {
 221                 tmpint += itemindex*4;
 222                 return ntohl(*(int32_t*)tmpint);
 223         }
 224         if (found[0]->type == RPM_INT16_TYPE) {
 225                 tmpint += itemindex*2;
 226                 return ntohs(*(int16_t*)tmpint);
 227         }
 228         if (found[0]->type == RPM_INT8_TYPE) {
 229                 tmpint += itemindex;
 230                 return *(int8_t*)tmpint;
 231         }
 232         return -1;
 233 }
 234
 235 static void fileaction_dobackup(char *filename, int fileref)
 236 {
 237         struct stat oldfile;
 238         int stat_res;
 239         char *newname;
 240         if (rpm_getint(TAG_FILEFLAGS, fileref) & RPMFILE_CONFIG) {
 241                 /* Only need to backup config files */
 242                 stat_res = lstat(filename, &oldfile);
 243                 if (stat_res == 0 && S_ISREG(oldfile.st_mode)) {
 244                         /* File already exists  - really should check MD5's etc to see if different */
 245                         newname = xasprintf("%s.rpmorig", filename);
 246                         copy_file(filename, newname, FILEUTILS_RECUR | FILEUTILS_PRESERVE_STATUS);
 247                         remove_file(filename, FILEUTILS_RECUR | FILEUTILS_FORCE);
 248                         free(newname);
 249                 }
 250         }
 251 }
 252
 253 static void fileaction_setowngrp(char *filename, int fileref)
 254 {
 255         /* real rpm warns: "user foo does not exist - using <you>" */
 256         struct passwd *pw = getpwnam(rpm_getstr(TAG_FILEUSERNAME, fileref));
 257         int uid = pw ? pw->pw_uid : getuid(); /* or euid? */
 258         struct group *gr = getgrnam(rpm_getstr(TAG_FILEGROUPNAME, fileref));
 259         int gid = gr ? gr->gr_gid : getgid();
 260         chown(filename, uid, gid);
 261 }
 262
 263 static void loop_through_files(int filetag, void (*fileaction)(char *filename, int fileref))
 264 {
 265         int count = 0;
 266         while (rpm_getstr(filetag, count)) {
 267                 char* filename = xasprintf("%s%s",
 268                         rpm_getstr(TAG_DIRNAMES, rpm_getint(TAG_DIRINDEXES, count)),
 269                         rpm_getstr(TAG_BASENAMES, count));
 270                 fileaction(filename, count++);
 271                 free(filename);
 272         }
 273 }
 274
 275 int rpm_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 276 int rpm_main(int argc, char **argv)
 277 {
 278         int opt, func = 0;
 279         const unsigned pagesize = getpagesize();
 280
 281         while ((opt = getopt(argc, argv, "iqpldc")) != -1) {
 282                 switch (opt) {
 283                 case 'i': /* First arg: Install mode, with q: Information */
 284                         if (!func) func = rpm_install;
 285                         else func |= rpm_query_info;
 286                         break;
 287                 case 'q': /* First arg: Query mode */
 288                         if (func) bb_show_usage();
 289                         func = rpm_query;
 290                         break;
 291                 case 'p': /* Query a package */
 292                         func |= rpm_query_package;
 293                         break;
 294                 case 'l': /* List files in a package */
 295                         func |= rpm_query_list;
 296                         break;
 297                 case 'd': /* List doc files in a package (implies list) */
 298                         func |= rpm_query_list;
 299                         func |= rpm_query_list_doc;
 300                         break;
 301                 case 'c': /* List config files in a package (implies list) */
 302                         func |= rpm_query_list;
 303                         func |= rpm_query_list_config;
 304                         break;
 305                 default:
 306                         bb_show_usage();
 307                 }
 308         }
 309         argv += optind;
 310         //argc -= optind;
 311         if (!argv[0]) {
 312                 bb_show_usage();
 313         }
 314
 315         while (*argv) {
 316                 int rpm_fd;
 317                 unsigned mapsize;
 318                 const char *source_rpm;
 319
 320                 rpm_fd = xopen(*argv++, O_RDONLY);
 321                 G.mytags = rpm_gettags(rpm_fd, &G.tagcount);
 322                 if (!G.mytags)
 323                         bb_error_msg_and_die("error reading rpm header");
 324                 mapsize = xlseek(rpm_fd, 0, SEEK_CUR);
 325                 mapsize = (mapsize + pagesize) & -(int)pagesize;
 326                 /* Some NOMMU systems prefer MAP_PRIVATE over MAP_SHARED */
 327                 G.map = mmap(0, mapsize, PROT_READ, MAP_PRIVATE, rpm_fd, 0);
 328 //FIXME: error check?
 329
 330                 source_rpm = rpm_getstr(TAG_SOURCERPM, 0);
 331
 332                 if (func & rpm_install) {
 333                         /* Backup any config files */
 334                         loop_through_files(TAG_BASENAMES, fileaction_dobackup);
 335                         /* Extact the archive */
 336                         extract_cpio(rpm_fd, source_rpm);
 337                         /* Set the correct file uid/gid's */
 338                         loop_through_files(TAG_BASENAMES, fileaction_setowngrp);
 339                 }
 340                 else if ((func & (rpm_query|rpm_query_package)) == (rpm_query|rpm_query_package)) {
 341                         if (!(func & (rpm_query_info|rpm_query_list))) {
 342                                 /* If just a straight query, just give package name */
 343                                 printf("%s-%s-%s\n", rpm_getstr(TAG_NAME, 0), rpm_getstr(TAG_VERSION, 0), rpm_getstr(TAG_RELEASE, 0));
 344                         }
 345                         if (func & rpm_query_info) {
 346                                 /* Do the nice printout */
 347                                 time_t bdate_time;
 348                                 struct tm *bdate_ptm;
 349                                 char bdatestring[50];
 350                                 const char *p;
 351
 352                                 printf("%-12s: %s\n", "Name"        , rpm_getstr(TAG_NAME, 0));
 353                                 /* TODO compat: add "Epoch" here */
 354                                 printf("%-12s: %s\n", "Version"     , rpm_getstr(TAG_VERSION, 0));
 355                                 printf("%-12s: %s\n", "Release"     , rpm_getstr(TAG_RELEASE, 0));
 356                                 /* add "Architecture" */
 357                                 printf("%-12s: %s\n", "Install Date", "(not installed)");
 358                                 printf("%-12s: %s\n", "Group"       , rpm_getstr(TAG_GROUP, 0));
 359                                 printf("%-12s: %d\n", "Size"        , rpm_getint(TAG_SIZE, 0));
 360                                 printf("%-12s: %s\n", "License"     , rpm_getstr(TAG_LICENSE, 0));
 361                                 /* add "Signature" */
 362                                 printf("%-12s: %s\n", "Source RPM"  , source_rpm ? source_rpm : "(none)");
 363                                 bdate_time = rpm_getint(TAG_BUILDTIME, 0);
 364                                 bdate_ptm = localtime(&bdate_time);
 365                                 strftime(bdatestring, 50, "%a %d %b %Y %T %Z", bdate_ptm);
 366                                 printf("%-12s: %s\n", "Build Date"  , bdatestring);
 367                                 printf("%-12s: %s\n", "Build Host"  , rpm_getstr(TAG_BUILDHOST, 0));
 368                                 p = rpm_getstr(TAG_PREFIXS, 0);
 369                                 printf("%-12s: %s\n", "Relocations" , p ? p : "(not relocatable)");
 370                                 /* add "Packager" */
 371                                 p = rpm_getstr(TAG_VENDOR, 0);
 372                                 printf("%-12s: %s\n", "Vendor"      , p ? p : "(none)");
 373                                 printf("%-12s: %s\n", "URL"         , rpm_getstr(TAG_URL, 0));
 374                                 printf("%-12s: %s\n", "Summary"     , rpm_getstr(TAG_SUMMARY, 0));
 375                                 printf("Description :\n%s\n", rpm_getstr(TAG_DESCRIPTION, 0));
 376                         }
 377                         if (func & rpm_query_list) {
 378                                 int count, it, flags;
 379                                 count = rpm_getcount(TAG_BASENAMES);
 380                                 for (it = 0; it < count; it++) {
 381                                         flags = rpm_getint(TAG_FILEFLAGS, it);
 382                                         switch (func & (rpm_query_list_doc|rpm_query_list_config)) {
 383                                         case rpm_query_list_doc:
 384                                                 if (!(flags & RPMFILE_DOC)) continue;
 385                                                 break;
 386                                         case rpm_query_list_config:
 387                                                 if (!(flags & RPMFILE_CONFIG)) continue;
 388                                                 break;
 389                                         case rpm_query_list_doc|rpm_query_list_config:
 390                                                 if (!(flags & (RPMFILE_CONFIG|RPMFILE_DOC))) continue;
 391                                                 break;
 392                                         }
 393                                         printf("%s%s\n",
 394                                                 rpm_getstr(TAG_DIRNAMES, rpm_getint(TAG_DIRINDEXES, it)),
 395                                                 rpm_getstr(TAG_BASENAMES, it));
 396                                 }
 397                         }
 398                 }
 399                 munmap(G.map, mapsize);
 400                 free(G.mytags);
 401                 close(rpm_fd);
 402         }
 403         return 0;
 404 }