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:     "\nOptions:"
  18 //usage:     "\n        -i      Show information"
  19 //usage:     "\n        -l      List contents"
  20 //usage:     "\n        -d      List documents"
  21 //usage:     "\n        -c      List config files"
  22
  23 #include "libbb.h"
  24 #include "archive.h"
  25 #include "rpm.h"
  26
  27 #define RPM_CHAR_TYPE           1
  28 #define RPM_INT8_TYPE           2
  29 #define RPM_INT16_TYPE          3
  30 #define RPM_INT32_TYPE          4
  31 /* #define RPM_INT64_TYPE       5   ---- These aren't supported (yet) */
  32 #define RPM_STRING_TYPE         6
  33 #define RPM_BIN_TYPE            7
  34 #define RPM_STRING_ARRAY_TYPE   8
  35 #define RPM_I18NSTRING_TYPE     9
  36
  37 #define TAG_NAME                1000
  38 #define TAG_VERSION             1001
  39 #define TAG_RELEASE             1002
  40 #define TAG_SUMMARY             1004
  41 #define TAG_DESCRIPTION         1005
  42 #define TAG_BUILDTIME           1006
  43 #define TAG_BUILDHOST           1007
  44 #define TAG_SIZE                1009
  45 #define TAG_VENDOR              1011
  46 #define TAG_LICENSE             1014
  47 #define TAG_PACKAGER            1015
  48 #define TAG_GROUP               1016
  49 #define TAG_URL                 1020
  50 #define TAG_PREIN               1023
  51 #define TAG_POSTIN              1024
  52 #define TAG_FILEFLAGS           1037
  53 #define TAG_FILEUSERNAME        1039
  54 #define TAG_FILEGROUPNAME       1040
  55 #define TAG_SOURCERPM           1044
  56 #define TAG_PREINPROG           1085
  57 #define TAG_POSTINPROG          1086
  58 #define TAG_PREFIXS             1098
  59 #define TAG_DIRINDEXES          1116
  60 #define TAG_BASENAMES           1117
  61 #define TAG_DIRNAMES            1118
  62
  63 #define RPMFILE_CONFIG          (1 << 0)
  64 #define RPMFILE_DOC             (1 << 1)
  65
  66 enum rpm_functions_e {
  67         rpm_query = 1,
  68         rpm_install = 2,
  69         rpm_query_info = 4,
  70         rpm_query_package = 8,
  71         rpm_query_list = 16,
  72         rpm_query_list_doc = 32,
  73         rpm_query_list_config = 64
  74 };
  75
  76 typedef struct {
  77         uint32_t tag; /* 4 byte tag */
  78         uint32_t type; /* 4 byte type */
  79         uint32_t offset; /* 4 byte offset */
  80         uint32_t count; /* 4 byte count */
  81 } rpm_index;
  82
  83 static void *map;
  84 static rpm_index **mytags;
  85 static int tagcount;
  86
  87 static void extract_cpio(int fd, const char *source_rpm);
  88 static rpm_index **rpm_gettags(int fd, int *num_tags);
  89 static int bsearch_rpmtag(const void *key, const void *item);
  90 static char *rpm_getstr(int tag, int itemindex);
  91 static int rpm_getint(int tag, int itemindex);
  92 static int rpm_getcount(int tag);
  93 static void fileaction_dobackup(char *filename, int fileref);
  94 static void fileaction_setowngrp(char *filename, int fileref);
  95 static void loop_through_files(int filetag, void (*fileaction)(char *filename, int fileref));
  96
  97 int rpm_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  98 int rpm_main(int argc, char **argv)
  99 {
 100         int opt = 0, func = 0, rpm_fd, offset;
 101         const int pagesize = getpagesize();
 102
 103         while ((opt = getopt(argc, argv, "iqpldc")) != -1) {
 104                 switch (opt) {
 105                 case 'i': /* First arg: Install mode, with q: Information */
 106                         if (!func) func = rpm_install;
 107                         else func |= rpm_query_info;
 108                         break;
 109                 case 'q': /* First arg: Query mode */
 110                         if (func) bb_show_usage();
 111                         func = rpm_query;
 112                         break;
 113                 case 'p': /* Query a package */
 114                         func |= rpm_query_package;
 115                         break;
 116                 case 'l': /* List files in a package */
 117                         func |= rpm_query_list;
 118                         break;
 119                 case 'd': /* List doc files in a package (implies list) */
 120                         func |= rpm_query_list;
 121                         func |= rpm_query_list_doc;
 122                         break;
 123                 case 'c': /* List config files in a package (implies list) */
 124                         func |= rpm_query_list;
 125                         func |= rpm_query_list_config;
 126                         break;
 127                 default:
 128                         bb_show_usage();
 129                 }
 130         }
 131         argv += optind;
 132         //argc -= optind;
 133         if (!argv[0]) {
 134                 bb_show_usage();
 135         }
 136
 137         while (*argv) {
 138                 const char *source_rpm;
 139
 140                 rpm_fd = xopen(*argv++, O_RDONLY);
 141                 mytags = rpm_gettags(rpm_fd, &tagcount);
 142                 if (!mytags)
 143                         bb_error_msg_and_die("error reading rpm header");
 144                 offset = xlseek(rpm_fd, 0, SEEK_CUR);
 145                 /* Mimimum is one page */
 146                 map = mmap(0, offset > pagesize ? (offset + offset % pagesize) : pagesize, PROT_READ, MAP_PRIVATE, rpm_fd, 0);
 147
 148                 source_rpm = rpm_getstr(TAG_SOURCERPM, 0);
 149
 150                 if (func & rpm_install) {
 151                         /* Backup any config files */
 152                         loop_through_files(TAG_BASENAMES, fileaction_dobackup);
 153                         /* Extact the archive */
 154                         extract_cpio(rpm_fd, source_rpm);
 155                         /* Set the correct file uid/gid's */
 156                         loop_through_files(TAG_BASENAMES, fileaction_setowngrp);
 157                 }
 158                 else if ((func & (rpm_query|rpm_query_package)) == (rpm_query|rpm_query_package)) {
 159                         if (!(func & (rpm_query_info|rpm_query_list))) {
 160                                 /* If just a straight query, just give package name */
 161                                 printf("%s-%s-%s\n", rpm_getstr(TAG_NAME, 0), rpm_getstr(TAG_VERSION, 0), rpm_getstr(TAG_RELEASE, 0));
 162                         }
 163                         if (func & rpm_query_info) {
 164                                 /* Do the nice printout */
 165                                 time_t bdate_time;
 166                                 struct tm *bdate_ptm;
 167                                 char bdatestring[50];
 168                                 const char *p;
 169
 170                                 p = rpm_getstr(TAG_PREFIXS, 0);
 171                                 if (!p) p = "(not relocateable)";
 172                                 printf("Name        : %-29sRelocations: %s\n", rpm_getstr(TAG_NAME, 0), p);
 173                                 p = rpm_getstr(TAG_VENDOR, 0);
 174                                 if (!p) p = "(none)";
 175                                 printf("Version     : %-34sVendor: %s\n", rpm_getstr(TAG_VERSION, 0), p);
 176                                 bdate_time = rpm_getint(TAG_BUILDTIME, 0);
 177                                 bdate_ptm = localtime(&bdate_time);
 178                                 strftime(bdatestring, 50, "%a %d %b %Y %T %Z", bdate_ptm);
 179                                 printf("Release     : %-30sBuild Date: %s\n", rpm_getstr(TAG_RELEASE, 0), bdatestring);
 180                                 printf("Install date: %-30sBuild Host: %s\n", "(not installed)", rpm_getstr(TAG_BUILDHOST, 0));
 181                                 printf("Group       : %-30sSource RPM: %s\n", rpm_getstr(TAG_GROUP, 0), source_rpm);
 182                                 printf("Size        : %-33dLicense: %s\n", rpm_getint(TAG_SIZE, 0), rpm_getstr(TAG_LICENSE, 0));
 183                                 printf("URL         : %s\n", rpm_getstr(TAG_URL, 0));
 184                                 printf("Summary     : %s\n", rpm_getstr(TAG_SUMMARY, 0));
 185                                 printf("Description :\n%s\n", rpm_getstr(TAG_DESCRIPTION, 0));
 186                         }
 187                         if (func & rpm_query_list) {
 188                                 int count, it, flags;
 189                                 count = rpm_getcount(TAG_BASENAMES);
 190                                 for (it = 0; it < count; it++) {
 191                                         flags = rpm_getint(TAG_FILEFLAGS, it);
 192                                         switch (func & (rpm_query_list_doc|rpm_query_list_config)) {
 193                                         case rpm_query_list_doc:
 194                                                 if (!(flags & RPMFILE_DOC)) continue;
 195                                                 break;
 196                                         case rpm_query_list_config:
 197                                                 if (!(flags & RPMFILE_CONFIG)) continue;
 198                                                 break;
 199                                         case rpm_query_list_doc|rpm_query_list_config:
 200                                                 if (!(flags & (RPMFILE_CONFIG|RPMFILE_DOC))) continue;
 201                                                 break;
 202                                         }
 203                                         printf("%s%s\n",
 204                                                 rpm_getstr(TAG_DIRNAMES, rpm_getint(TAG_DIRINDEXES, it)),
 205                                                 rpm_getstr(TAG_BASENAMES, it));
 206                                 }
 207                         }
 208                 }
 209                 free(mytags);
 210         }
 211         return 0;
 212 }
 213
 214 static void extract_cpio(int fd, const char *source_rpm)
 215 {
 216         archive_handle_t *archive_handle;
 217
 218         if (source_rpm != NULL) {
 219                 /* Binary rpm (it was built from some SRPM), install to root */
 220                 xchdir("/");
 221         } /* else: SRPM, install to current dir */
 222
 223         /* Initialize */
 224         archive_handle = init_handle();
 225         archive_handle->seek = seek_by_read;
 226         archive_handle->action_data = data_extract_all;
 227 #if 0 /* For testing (rpm -i only lists the files in internal cpio): */
 228         archive_handle->action_header = header_list;
 229         archive_handle->action_data = data_skip;
 230 #endif
 231         archive_handle->ah_flags = ARCHIVE_RESTORE_DATE | ARCHIVE_CREATE_LEADING_DIRS
 232                 /* compat: overwrite existing files.
 233                  * try "rpm -i foo.src.rpm" few times in a row -
 234                  * standard rpm will not complain.
 235                  * (TODO? real rpm creates "file;1234" and then renames it) */
 236                 | ARCHIVE_UNLINK_OLD;
 237         archive_handle->src_fd = fd;
 238         /*archive_handle->offset = 0; - init_handle() did it */
 239
 240         setup_unzip_on_fd(archive_handle->src_fd /*, fail_if_not_detected: 1*/);
 241         while (get_header_cpio(archive_handle) == EXIT_SUCCESS)
 242                 continue;
 243 }
 244
 245 static rpm_index **rpm_gettags(int fd, int *num_tags)
 246 {
 247         /* We should never need more than 200 (shrink via realloc later) */
 248         rpm_index **tags = xzalloc(200 * sizeof(tags[0]));
 249         int pass, tagindex = 0;
 250
 251         xlseek(fd, 96, SEEK_CUR); /* Seek past the unused lead */
 252
 253         /* 1st pass is the signature headers, 2nd is the main stuff */
 254         for (pass = 0; pass < 2; pass++) {
 255                 struct rpm_header header;
 256                 rpm_index *tmpindex;
 257                 int storepos;
 258
 259                 xread(fd, &header, sizeof(header));
 260                 if (header.magic_and_ver != htonl(RPM_HEADER_MAGICnVER))
 261                         return NULL; /* Invalid magic, or not version 1 */
 262                 header.size = ntohl(header.size);
 263                 header.entries = ntohl(header.entries);
 264                 storepos = xlseek(fd, 0, SEEK_CUR) + header.entries * 16;
 265
 266                 while (header.entries--) {
 267                         tmpindex = tags[tagindex++] = xmalloc(sizeof(*tmpindex));
 268                         xread(fd, tmpindex, sizeof(*tmpindex));
 269                         tmpindex->tag = ntohl(tmpindex->tag);
 270                         tmpindex->type = ntohl(tmpindex->type);
 271                         tmpindex->count = ntohl(tmpindex->count);
 272                         tmpindex->offset = storepos + ntohl(tmpindex->offset);
 273                         if (pass == 0)
 274                                 tmpindex->tag -= 743;
 275                 }
 276                 storepos = xlseek(fd, header.size, SEEK_CUR); /* Seek past store */
 277                 /* Skip padding to 8 byte boundary after reading signature headers */
 278                 if (pass == 0)
 279                         xlseek(fd, (-storepos) & 0x7, SEEK_CUR);
 280         }
 281         /* realloc tags to save space */
 282         tags = xrealloc(tags, tagindex * sizeof(tags[0]));
 283         *num_tags = tagindex;
 284         /* All done, leave the file at the start of the gzipped cpio archive */
 285         return tags;
 286 }
 287
 288 static int bsearch_rpmtag(const void *key, const void *item)
 289 {
 290         int *tag = (int *)key;
 291         rpm_index **tmp = (rpm_index **) item;
 292         return (*tag - tmp[0]->tag);
 293 }
 294
 295 static int rpm_getcount(int tag)
 296 {
 297         rpm_index **found;
 298         found = bsearch(&tag, mytags, tagcount, sizeof(struct rpmtag *), bsearch_rpmtag);
 299         if (!found)
 300                 return 0;
 301         return found[0]->count;
 302 }
 303
 304 static char *rpm_getstr(int tag, int itemindex)
 305 {
 306         rpm_index **found;
 307         found = bsearch(&tag, mytags, tagcount, sizeof(struct rpmtag *), bsearch_rpmtag);
 308         if (!found || itemindex >= found[0]->count)
 309                 return NULL;
 310         if (found[0]->type == RPM_STRING_TYPE
 311          || found[0]->type == RPM_I18NSTRING_TYPE
 312          || found[0]->type == RPM_STRING_ARRAY_TYPE
 313         ) {
 314                 int n;
 315                 char *tmpstr = (char *) map + found[0]->offset;
 316                 for (n = 0; n < itemindex; n++)
 317                         tmpstr = tmpstr + strlen(tmpstr) + 1;
 318                 return tmpstr;
 319         }
 320         return NULL;
 321 }
 322
 323 static int rpm_getint(int tag, int itemindex)
 324 {
 325         rpm_index **found;
 326         int *tmpint; /* NB: using int8_t* would be easier to code */
 327
 328         /* gcc throws warnings here when sizeof(void*)!=sizeof(int) ...
 329          * it's ok to ignore it because tag won't be used as a pointer */
 330         found = bsearch(&tag, mytags, tagcount, sizeof(struct rpmtag *), bsearch_rpmtag);
 331         if (!found || itemindex >= found[0]->count)
 332                 return -1;
 333
 334         tmpint = (int *) ((char *) map + found[0]->offset);
 335
 336         if (found[0]->type == RPM_INT32_TYPE) {
 337                 tmpint = (int *) ((char *) tmpint + itemindex*4);
 338                 /*return ntohl(*tmpint);*/
 339                 /* int can be != int32_t */
 340                 return ntohl(*(int32_t*)tmpint);
 341         }
 342         if (found[0]->type == RPM_INT16_TYPE) {
 343                 tmpint = (int *) ((char *) tmpint + itemindex*2);
 344                 /* ??? read int, and THEN ntohs() it?? */
 345                 /*return ntohs(*tmpint);*/
 346                 return ntohs(*(int16_t*)tmpint);
 347         }
 348         if (found[0]->type == RPM_INT8_TYPE) {
 349                 tmpint = (int *) ((char *) tmpint + itemindex);
 350                 /* ??? why we don't read byte here??? */
 351                 /*return ntohs(*tmpint);*/
 352                 return *(int8_t*)tmpint;
 353         }
 354         return -1;
 355 }
 356
 357 static void fileaction_dobackup(char *filename, int fileref)
 358 {
 359         struct stat oldfile;
 360         int stat_res;
 361         char *newname;
 362         if (rpm_getint(TAG_FILEFLAGS, fileref) & RPMFILE_CONFIG) {
 363                 /* Only need to backup config files */
 364                 stat_res = lstat(filename, &oldfile);
 365                 if (stat_res == 0 && S_ISREG(oldfile.st_mode)) {
 366                         /* File already exists  - really should check MD5's etc to see if different */
 367                         newname = xasprintf("%s.rpmorig", filename);
 368                         copy_file(filename, newname, FILEUTILS_RECUR | FILEUTILS_PRESERVE_STATUS);
 369                         remove_file(filename, FILEUTILS_RECUR | FILEUTILS_FORCE);
 370                         free(newname);
 371                 }
 372         }
 373 }
 374
 375 static void fileaction_setowngrp(char *filename, int fileref)
 376 {
 377         /* real rpm warns: "user foo does not exist - using <you>" */
 378         struct passwd *pw = getpwnam(rpm_getstr(TAG_FILEUSERNAME, fileref));
 379         int uid = pw ? pw->pw_uid : getuid(); /* or euid? */
 380         struct group *gr = getgrnam(rpm_getstr(TAG_FILEGROUPNAME, fileref));
 381         int gid = gr ? gr->gr_gid : getgid();
 382         chown(filename, uid, gid);
 383 }
 384
 385 static void loop_through_files(int filetag, void (*fileaction)(char *filename, int fileref))
 386 {
 387         int count = 0;
 388         while (rpm_getstr(filetag, count)) {
 389                 char* filename = xasprintf("%s%s",
 390                         rpm_getstr(TAG_DIRNAMES, rpm_getint(TAG_DIRINDEXES, count)),
 391                         rpm_getstr(TAG_BASENAMES, count));
 392                 fileaction(filename, count++);
 393                 free(filename);
 394         }
 395 }