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