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