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