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 tarball for details.
   8  */
   9
  10 #include "libbb.h"
  11 #include "unarchive.h"
  12
  13 #define RPM_HEADER_MAGIC        "\216\255\350"
  14 #define RPM_CHAR_TYPE           1
  15 #define RPM_INT8_TYPE           2
  16 #define RPM_INT16_TYPE          3
  17 #define RPM_INT32_TYPE          4
  18 /* #define RPM_INT64_TYPE       5   ---- These aren't supported (yet) */
  19 #define RPM_STRING_TYPE         6
  20 #define RPM_BIN_TYPE            7
  21 #define RPM_STRING_ARRAY_TYPE   8
  22 #define RPM_I18NSTRING_TYPE     9
  23
  24 #define TAG_NAME                1000
  25 #define TAG_VERSION             1001
  26 #define TAG_RELEASE             1002
  27 #define TAG_SUMMARY             1004
  28 #define TAG_DESCRIPTION         1005
  29 #define TAG_BUILDTIME           1006
  30 #define TAG_BUILDHOST           1007
  31 #define TAG_SIZE                1009
  32 #define TAG_VENDOR              1011
  33 #define TAG_LICENSE             1014
  34 #define TAG_PACKAGER            1015
  35 #define TAG_GROUP               1016
  36 #define TAG_URL                 1020
  37 #define TAG_PREIN               1023
  38 #define TAG_POSTIN              1024
  39 #define TAG_FILEFLAGS           1037
  40 #define TAG_FILEUSERNAME        1039
  41 #define TAG_FILEGROUPNAME       1040
  42 #define TAG_SOURCERPM           1044
  43 #define TAG_PREINPROG           1085
  44 #define TAG_POSTINPROG          1086
  45 #define TAG_PREFIXS             1098
  46 #define TAG_DIRINDEXES          1116
  47 #define TAG_BASENAMES           1117
  48 #define TAG_DIRNAMES            1118
  49 #define RPMFILE_CONFIG          (1 << 0)
  50 #define RPMFILE_DOC             (1 << 1)
  51
  52 enum rpm_functions_e {
  53         rpm_query = 1,
  54         rpm_install = 2,
  55         rpm_query_info = 4,
  56         rpm_query_package = 8,
  57         rpm_query_list = 16,
  58         rpm_query_list_doc = 32,
  59         rpm_query_list_config = 64
  60 };
  61
  62 typedef struct {
  63         uint32_t tag; /* 4 byte tag */
  64         uint32_t type; /* 4 byte type */
  65         uint32_t offset; /* 4 byte offset */
  66         uint32_t count; /* 4 byte count */
  67 } rpm_index;
  68
  69 static void *map;
  70 static rpm_index **mytags;
  71 static int tagcount;
  72
  73 static void extract_cpio_gz(int fd);
  74 static rpm_index **rpm_gettags(int fd, int *num_tags);
  75 static int bsearch_rpmtag(const void *key, const void *item);
  76 static char *rpm_getstr(int tag, int itemindex);
  77 static int rpm_getint(int tag, int itemindex);
  78 static int rpm_getcount(int tag);
  79 static void fileaction_dobackup(char *filename, int fileref);
  80 static void fileaction_setowngrp(char *filename, int fileref);
  81 static void loop_through_files(int filetag, void (*fileaction)(char *filename, int fileref));
  82
  83 int rpm_main(int argc, char **argv);
  84 int rpm_main(int argc, char **argv)
  85 {
  86         int opt = 0, func = 0, rpm_fd, offset;
  87         const int pagesize = getpagesize();
  88
  89         while ((opt = getopt(argc, argv, "iqpldc")) != -1) {
  90                 switch (opt) {
  91                 case 'i': /* First arg: Install mode, with q: Information */
  92                         if (!func) func = rpm_install;
  93                         else func |= rpm_query_info;
  94                         break;
  95                 case 'q': /* First arg: Query mode */
  96                         if (func) bb_show_usage();
  97                         func = rpm_query;
  98                         break;
  99                 case 'p': /* Query a package */
 100                         func |= rpm_query_package;
 101                         break;
 102                 case 'l': /* List files in a package */
 103                         func |= rpm_query_list;
 104                         break;
 105                 case 'd': /* List doc files in a package (implies list) */
 106                         func |= rpm_query_list;
 107                         func |= rpm_query_list_doc;
 108                         break;
 109                 case 'c': /* List config files in a package (implies list) */
 110                         func |= rpm_query_list;
 111                         func |= rpm_query_list_config;
 112                         break;
 113                 default:
 114                         bb_show_usage();
 115                 }
 116         }
 117         argv += optind;
 118         argc -= optind;
 119         if (!argc) bb_show_usage();
 120
 121         while (*argv) {
 122                 rpm_fd = xopen(*argv++, O_RDONLY);
 123                 mytags = rpm_gettags(rpm_fd, &tagcount);
 124                 if (!mytags)
 125                         bb_error_msg_and_die("error reading rpm header");
 126                 offset = xlseek(rpm_fd, 0, SEEK_CUR);
 127                 /* Mimimum is one page */
 128                 map = mmap(0, offset > pagesize ? (offset + offset % pagesize) : pagesize, PROT_READ, MAP_PRIVATE, rpm_fd, 0);
 129
 130                 if (func & rpm_install) {
 131                         /* Backup any config files */
 132                         loop_through_files(TAG_BASENAMES, fileaction_dobackup);
 133                         /* Extact the archive */
 134                         extract_cpio_gz(rpm_fd);
 135                         /* Set the correct file uid/gid's */
 136                         loop_through_files(TAG_BASENAMES, fileaction_setowngrp);
 137                 }
 138                 else if ((func & (rpm_query|rpm_query_package)) == (rpm_query|rpm_query_package)) {
 139                         if (!(func & (rpm_query_info|rpm_query_list))) {
 140                                 /* If just a straight query, just give package name */
 141                                 printf("%s-%s-%s\n", rpm_getstr(TAG_NAME, 0), rpm_getstr(TAG_VERSION, 0), rpm_getstr(TAG_RELEASE, 0));
 142                         }
 143                         if (func & rpm_query_info) {
 144                                 /* Do the nice printout */
 145                                 time_t bdate_time;
 146                                 struct tm *bdate;
 147                                 char bdatestring[50];
 148                                 printf("Name        : %-29sRelocations: %s\n", rpm_getstr(TAG_NAME, 0), rpm_getstr(TAG_PREFIXS, 0) ? rpm_getstr(TAG_PREFIXS, 0) : "(not relocateable)");
 149                                 printf("Version     : %-34sVendor: %s\n", rpm_getstr(TAG_VERSION, 0), rpm_getstr(TAG_VENDOR, 0) ? rpm_getstr(TAG_VENDOR, 0) : "(none)");
 150                                 bdate_time = rpm_getint(TAG_BUILDTIME, 0);
 151                                 bdate = localtime((time_t *) &bdate_time);
 152                                 strftime(bdatestring, 50, "%a %d %b %Y %T %Z", bdate);
 153                                 printf("Release     : %-30sBuild Date: %s\n", rpm_getstr(TAG_RELEASE, 0), bdatestring);
 154                                 printf("Install date: %-30sBuild Host: %s\n", "(not installed)", rpm_getstr(TAG_BUILDHOST, 0));
 155                                 printf("Group       : %-30sSource RPM: %s\n", rpm_getstr(TAG_GROUP, 0), rpm_getstr(TAG_SOURCERPM, 0));
 156                                 printf("Size        : %-33dLicense: %s\n", rpm_getint(TAG_SIZE, 0), rpm_getstr(TAG_LICENSE, 0));
 157                                 printf("URL         : %s\n", rpm_getstr(TAG_URL, 0));
 158                                 printf("Summary     : %s\n", rpm_getstr(TAG_SUMMARY, 0));
 159                                 printf("Description :\n%s\n", rpm_getstr(TAG_DESCRIPTION, 0));
 160                         }
 161                         if (func & rpm_query_list) {
 162                                 int count, it, flags;
 163                                 count = rpm_getcount(TAG_BASENAMES);
 164                                 for (it = 0; it < count; it++) {
 165                                         flags = rpm_getint(TAG_FILEFLAGS, it);
 166                                         switch (func & (rpm_query_list_doc|rpm_query_list_config)) {
 167                                         case rpm_query_list_doc:
 168                                                 if (!(flags & RPMFILE_DOC)) continue;
 169                                                 break;
 170                                         case rpm_query_list_config:
 171                                                 if (!(flags & RPMFILE_CONFIG)) continue;
 172                                                 break;
 173                                         case rpm_query_list_doc|rpm_query_list_config:
 174                                                 if (!(flags & (RPMFILE_CONFIG|RPMFILE_DOC))) continue;
 175                                                 break;
 176                                         }
 177                                         printf("%s%s\n",
 178                                                 rpm_getstr(TAG_DIRNAMES, rpm_getint(TAG_DIRINDEXES, it)),
 179                                                 rpm_getstr(TAG_BASENAMES, it));
 180                                 }
 181                         }
 182                 }
 183                 free(mytags);
 184         }
 185         return 0;
 186 }
 187
 188 static void extract_cpio_gz(int fd)
 189 {
 190         archive_handle_t *archive_handle;
 191         unsigned char magic[2];
 192 #if BB_MMU
 193         USE_DESKTOP(long long) int (*xformer)(int src_fd, int dst_fd);
 194         enum { xformer_prog = 0 };
 195 #else
 196         enum { xformer = 0 };
 197         const char *xformer_prog;
 198 #endif
 199
 200         /* Initialize */
 201         archive_handle = init_handle();
 202         archive_handle->seek = seek_by_read;
 203         //archive_handle->action_header = header_list;
 204         archive_handle->action_data = data_extract_all;
 205         archive_handle->flags |= ARCHIVE_PRESERVE_DATE;
 206         archive_handle->flags |= ARCHIVE_CREATE_LEADING_DIRS;
 207         archive_handle->src_fd = fd;
 208         archive_handle->offset = 0;
 209
 210         xread(archive_handle->src_fd, &magic, 2);
 211 #if BB_MMU
 212         xformer = unpack_gz_stream;
 213 #else
 214         xformer_prog = "gunzip";
 215 #endif
 216         if ((magic[0] != 0x1f) || (magic[1] != 0x8b)) {
 217                 if (ENABLE_FEATURE_RPM_BZ2
 218                  && (magic[0] == 0x42) && (magic[1] == 0x5a)) {
 219 #if BB_MMU
 220                         xformer = unpack_bz2_stream;
 221 #else
 222                         xformer_prog = "bunzip2";
 223 #endif
 224         /* We can do better, need modifying unpack_bz2_stream to not require
 225          * first 2 bytes. Not very hard to do... I mean, TODO :) */
 226                         xlseek(archive_handle->src_fd, -2, SEEK_CUR);
 227                 } else
 228                         bb_error_msg_and_die("no gzip"
 229                                 USE_FEATURE_RPM_BZ2("/bzip")
 230                                 " magic");
 231         } else {
 232                 check_header_gzip_or_die(archive_handle->src_fd);
 233 #if !BB_MMU
 234                 /* NOMMU version of open_transformer execs an external unzipper that should
 235                  * have the file position at the start of the file */
 236                 xlseek(archive_handle->src_fd, 0, SEEK_SET);
 237 #endif
 238         }
 239
 240         xchdir("/"); /* Install RPM's to root */
 241         archive_handle->src_fd = open_transformer(archive_handle->src_fd, xformer, xformer_prog, xformer_prog, "-cf", "-", NULL);
 242         archive_handle->offset = 0;
 243         while (get_header_cpio(archive_handle) == EXIT_SUCCESS)
 244                 continue;
 245 }
 246
 247
 248 static rpm_index **rpm_gettags(int fd, int *num_tags)
 249 {
 250         /* We should never need mode than 200, and realloc later */
 251         rpm_index **tags = xzalloc(200 * sizeof(struct rpmtag *));
 252         int pass, tagindex = 0;
 253
 254         xlseek(fd, 96, SEEK_CUR); /* Seek past the unused lead */
 255
 256         /* 1st pass is the signature headers, 2nd is the main stuff */
 257         for (pass = 0; pass < 2; pass++) {
 258                 struct {
 259                         char magic[3]; /* 3 byte magic: 0x8e 0xad 0xe8 */
 260                         uint8_t version; /* 1 byte version number */
 261                         uint32_t reserved; /* 4 bytes reserved */
 262                         uint32_t entries; /* Number of entries in header (4 bytes) */
 263                         uint32_t size; /* Size of store (4 bytes) */
 264                 } header;
 265                 rpm_index *tmpindex;
 266                 int storepos;
 267
 268                 xread(fd, &header, sizeof(header));
 269                 if (strncmp((char *) &header.magic, RPM_HEADER_MAGIC, 3) != 0)
 270                         return NULL; /* Invalid magic */
 271                 if (header.version != 1)
 272                         return NULL; /* This program only supports v1 headers */
 273                 header.size = ntohl(header.size);
 274                 header.entries = ntohl(header.entries);
 275                 storepos = xlseek(fd,0,SEEK_CUR) + header.entries * 16;
 276
 277                 while (header.entries--) {
 278                         tmpindex = tags[tagindex++] = xmalloc(sizeof(rpm_index));
 279                         xread(fd, tmpindex, sizeof(rpm_index));
 280                         tmpindex->tag = ntohl(tmpindex->tag);
 281                         tmpindex->type = ntohl(tmpindex->type);
 282                         tmpindex->count = ntohl(tmpindex->count);
 283                         tmpindex->offset = storepos + ntohl(tmpindex->offset);
 284                         if (pass==0)
 285                                 tmpindex->tag -= 743;
 286                 }
 287                 xlseek(fd, header.size, SEEK_CUR); /* Seek past store */
 288                 /* Skip padding to 8 byte boundary after reading signature headers */
 289                 if (pass==0)
 290                         xlseek(fd, (8 - (xlseek(fd,0,SEEK_CUR) % 8)) % 8, SEEK_CUR);
 291         }
 292         tags = xrealloc(tags, tagindex * sizeof(struct rpmtag *)); /* realloc tags to save space */
 293         *num_tags = tagindex;
 294         return tags; /* All done, leave the file at the start of the gzipped cpio archive */
 295 }
 296
 297 static int bsearch_rpmtag(const void *key, const void *item)
 298 {
 299         int *tag = (int *)key;
 300         rpm_index **tmp = (rpm_index **) item;
 301         return (*tag - tmp[0]->tag);
 302 }
 303
 304 static int rpm_getcount(int tag)
 305 {
 306         rpm_index **found;
 307         found = bsearch(&tag, mytags, tagcount, sizeof(struct rpmtag *), bsearch_rpmtag);
 308         if (!found)
 309                 return 0;
 310         return found[0]->count;
 311 }
 312
 313 static char *rpm_getstr(int tag, int itemindex)
 314 {
 315         rpm_index **found;
 316         found = bsearch(&tag, mytags, tagcount, sizeof(struct rpmtag *), bsearch_rpmtag);
 317         if (!found || itemindex >= found[0]->count)
 318                 return NULL;
 319         if (found[0]->type == RPM_STRING_TYPE || found[0]->type == RPM_I18NSTRING_TYPE || found[0]->type == RPM_STRING_ARRAY_TYPE) {
 320                 int n;
 321                 char *tmpstr = (char *) (map + found[0]->offset);
 322                 for (n=0; n < itemindex; n++)
 323                         tmpstr = tmpstr + strlen(tmpstr) + 1;
 324                 return tmpstr;
 325         }
 326         return NULL;
 327 }
 328
 329 static int rpm_getint(int tag, int itemindex)
 330 {
 331         rpm_index **found;
 332         int *tmpint; /* NB: using int8_t* would be easier to code */
 333
 334         /* gcc throws warnings here when sizeof(void*)!=sizeof(int) ...
 335          * it's ok to ignore it because tag won't be used as a pointer */
 336         found = bsearch(&tag, mytags, tagcount, sizeof(struct rpmtag *), bsearch_rpmtag);
 337         if (!found || itemindex >= found[0]->count)
 338                 return -1;
 339
 340         tmpint = (int *) (map + found[0]->offset);
 341
 342         if (found[0]->type == RPM_INT32_TYPE) {
 343                 tmpint = (int *) ((char *) tmpint + itemindex*4);
 344                 /*return ntohl(*tmpint);*/
 345                 /* int can be != int32_t */
 346                 return ntohl(*(int32_t*)tmpint);
 347         }
 348         if (found[0]->type == RPM_INT16_TYPE) {
 349                 tmpint = (int *) ((char *) tmpint + itemindex*2);
 350                 /* ??? read int, and THEN ntohs() it?? */
 351                 /*return ntohs(*tmpint);*/
 352                 return ntohs(*(int16_t*)tmpint);
 353         }
 354         if (found[0]->type == RPM_INT8_TYPE) {
 355                 tmpint = (int *) ((char *) tmpint + itemindex);
 356                 /* ??? why we don't read byte here??? */
 357                 /*return ntohs(*tmpint);*/
 358                 return *(int8_t*)tmpint;
 359         }
 360         return -1;
 361 }
 362
 363 static void fileaction_dobackup(char *filename, int fileref)
 364 {
 365         struct stat oldfile;
 366         int stat_res;
 367         char *newname;
 368         if (rpm_getint(TAG_FILEFLAGS, fileref) & RPMFILE_CONFIG) {
 369                 /* Only need to backup config files */
 370                 stat_res = lstat(filename, &oldfile);
 371                 if (stat_res == 0 && S_ISREG(oldfile.st_mode)) {
 372                         /* File already exists  - really should check MD5's etc to see if different */
 373                         newname = xasprintf("%s.rpmorig", filename);
 374                         copy_file(filename, newname, FILEUTILS_RECUR | FILEUTILS_PRESERVE_STATUS);
 375                         remove_file(filename, FILEUTILS_RECUR | FILEUTILS_FORCE);
 376                         free(newname);
 377                 }
 378         }
 379 }
 380
 381 static void fileaction_setowngrp(char *filename, int fileref)
 382 {
 383         int uid, gid;
 384         uid = xuname2uid(rpm_getstr(TAG_FILEUSERNAME, fileref));
 385         gid = xgroup2gid(rpm_getstr(TAG_FILEGROUPNAME, fileref));
 386         chown(filename, uid, gid);
 387 }
 388
 389 static void loop_through_files(int filetag, void (*fileaction)(char *filename, int fileref))
 390 {
 391         int count = 0;
 392         while (rpm_getstr(filetag, count)) {
 393                 char* filename = xasprintf("%s%s",
 394                         rpm_getstr(TAG_DIRNAMES, rpm_getint(TAG_DIRINDEXES, count)),
 395                         rpm_getstr(TAG_BASENAMES, count));
 396                 fileaction(filename, count++);
 397                 free(filename);
 398         }
 399 }