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 #include "rpm.h"
  13
  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
  50 #define RPMFILE_CONFIG          (1 << 0)
  51 #define RPMFILE_DOC             (1 << 1)
  52
  53 enum rpm_functions_e {
  54         rpm_query = 1,
  55         rpm_install = 2,
  56         rpm_query_info = 4,
  57         rpm_query_package = 8,
  58         rpm_query_list = 16,
  59         rpm_query_list_doc = 32,
  60         rpm_query_list_config = 64
  61 };
  62
  63 typedef struct {
  64         uint32_t tag; /* 4 byte tag */
  65         uint32_t type; /* 4 byte type */
  66         uint32_t offset; /* 4 byte offset */
  67         uint32_t count; /* 4 byte count */
  68 } rpm_index;
  69
  70 static void *map;
  71 static rpm_index **mytags;
  72 static int tagcount;
  73
  74 static void extract_cpio_gz(int fd);
  75 static rpm_index **rpm_gettags(int fd, int *num_tags);
  76 static int bsearch_rpmtag(const void *key, const void *item);
  77 static char *rpm_getstr(int tag, int itemindex);
  78 static int rpm_getint(int tag, int itemindex);
  79 static int rpm_getcount(int tag);
  80 static void fileaction_dobackup(char *filename, int fileref);
  81 static void fileaction_setowngrp(char *filename, int fileref);
  82 static void loop_through_files(int filetag, void (*fileaction)(char *filename, int fileref));
  83
  84 int rpm_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  85 int rpm_main(int argc, char **argv)
  86 {
  87         int opt = 0, func = 0, rpm_fd, offset;
  88         const int pagesize = getpagesize();
  89
  90         while ((opt = getopt(argc, argv, "iqpldc")) != -1) {
  91                 switch (opt) {
  92                 case 'i': /* First arg: Install mode, with q: Information */
  93                         if (!func) func = rpm_install;
  94                         else func |= rpm_query_info;
  95                         break;
  96                 case 'q': /* First arg: Query mode */
  97                         if (func) bb_show_usage();
  98                         func = rpm_query;
  99                         break;
 100                 case 'p': /* Query a package */
 101                         func |= rpm_query_package;
 102                         break;
 103                 case 'l': /* List files in a package */
 104                         func |= rpm_query_list;
 105                         break;
 106                 case 'd': /* List doc files in a package (implies list) */
 107                         func |= rpm_query_list;
 108                         func |= rpm_query_list_doc;
 109                         break;
 110                 case 'c': /* List config files in a package (implies list) */
 111                         func |= rpm_query_list;
 112                         func |= rpm_query_list_config;
 113                         break;
 114                 default:
 115                         bb_show_usage();
 116                 }
 117         }
 118         argv += optind;
 119         //argc -= optind;
 120         if (!argv[0]) {
 121                 bb_show_usage();
 122         }
 123
 124         while (*argv) {
 125                 rpm_fd = xopen(*argv++, O_RDONLY);
 126                 mytags = rpm_gettags(rpm_fd, &tagcount);
 127                 if (!mytags)
 128                         bb_error_msg_and_die("error reading rpm header");
 129                 offset = xlseek(rpm_fd, 0, SEEK_CUR);
 130                 /* Mimimum is one page */
 131                 map = mmap(0, offset > pagesize ? (offset + offset % pagesize) : pagesize, PROT_READ, MAP_PRIVATE, rpm_fd, 0);
 132
 133                 if (func & rpm_install) {
 134                         /* Backup any config files */
 135                         loop_through_files(TAG_BASENAMES, fileaction_dobackup);
 136                         /* Extact the archive */
 137                         extract_cpio_gz(rpm_fd);
 138                         /* Set the correct file uid/gid's */
 139                         loop_through_files(TAG_BASENAMES, fileaction_setowngrp);
 140                 }
 141                 else if ((func & (rpm_query|rpm_query_package)) == (rpm_query|rpm_query_package)) {
 142                         if (!(func & (rpm_query_info|rpm_query_list))) {
 143                                 /* If just a straight query, just give package name */
 144                                 printf("%s-%s-%s\n", rpm_getstr(TAG_NAME, 0), rpm_getstr(TAG_VERSION, 0), rpm_getstr(TAG_RELEASE, 0));
 145                         }
 146                         if (func & rpm_query_info) {
 147                                 /* Do the nice printout */
 148                                 time_t bdate_time;
 149                                 struct tm *bdate_ptm;
 150                                 char bdatestring[50];
 151                                 const char *p;
 152
 153                                 p = rpm_getstr(TAG_PREFIXS, 0);
 154                                 if (!p) p = "(not relocateable)";
 155                                 printf("Name        : %-29sRelocations: %s\n", rpm_getstr(TAG_NAME, 0), p);
 156                                 p = rpm_getstr(TAG_VENDOR, 0);
 157                                 if (!p) p = "(none)";
 158                                 printf("Version     : %-34sVendor: %s\n", rpm_getstr(TAG_VERSION, 0), p);
 159                                 bdate_time = rpm_getint(TAG_BUILDTIME, 0);
 160                                 bdate_ptm = localtime(&bdate_time);
 161                                 strftime(bdatestring, 50, "%a %d %b %Y %T %Z", bdate_ptm);
 162                                 printf("Release     : %-30sBuild Date: %s\n", rpm_getstr(TAG_RELEASE, 0), bdatestring);
 163                                 printf("Install date: %-30sBuild Host: %s\n", "(not installed)", rpm_getstr(TAG_BUILDHOST, 0));
 164                                 printf("Group       : %-30sSource RPM: %s\n", rpm_getstr(TAG_GROUP, 0), rpm_getstr(TAG_SOURCERPM, 0));
 165                                 printf("Size        : %-33dLicense: %s\n", rpm_getint(TAG_SIZE, 0), rpm_getstr(TAG_LICENSE, 0));
 166                                 printf("URL         : %s\n", rpm_getstr(TAG_URL, 0));
 167                                 printf("Summary     : %s\n", rpm_getstr(TAG_SUMMARY, 0));
 168                                 printf("Description :\n%s\n", rpm_getstr(TAG_DESCRIPTION, 0));
 169                         }
 170                         if (func & rpm_query_list) {
 171                                 int count, it, flags;
 172                                 count = rpm_getcount(TAG_BASENAMES);
 173                                 for (it = 0; it < count; it++) {
 174                                         flags = rpm_getint(TAG_FILEFLAGS, it);
 175                                         switch (func & (rpm_query_list_doc|rpm_query_list_config)) {
 176                                         case rpm_query_list_doc:
 177                                                 if (!(flags & RPMFILE_DOC)) continue;
 178                                                 break;
 179                                         case rpm_query_list_config:
 180                                                 if (!(flags & RPMFILE_CONFIG)) continue;
 181                                                 break;
 182                                         case rpm_query_list_doc|rpm_query_list_config:
 183                                                 if (!(flags & (RPMFILE_CONFIG|RPMFILE_DOC))) continue;
 184                                                 break;
 185                                         }
 186                                         printf("%s%s\n",
 187                                                 rpm_getstr(TAG_DIRNAMES, rpm_getint(TAG_DIRINDEXES, it)),
 188                                                 rpm_getstr(TAG_BASENAMES, it));
 189                                 }
 190                         }
 191                 }
 192                 free(mytags);
 193         }
 194         return 0;
 195 }
 196
 197 static void extract_cpio_gz(int fd)
 198 {
 199         archive_handle_t *archive_handle;
 200
 201         /* Initialize */
 202         archive_handle = init_handle();
 203         archive_handle->seek = seek_by_read;
 204         archive_handle->action_data = data_extract_all;
 205 #if 0 /* For testing (rpm -i only lists the files in internal cpio): */
 206         archive_handle->action_header = header_list;
 207         archive_handle->action_data = data_skip;
 208 #endif
 209         archive_handle->ah_flags = ARCHIVE_RESTORE_DATE | ARCHIVE_CREATE_LEADING_DIRS
 210                 /* compat: overwrite existing files.
 211                  * try "rpm -i foo.src.rpm" few times in a row -
 212                  * standard rpm will not complain.
 213                  * (TODO? real rpm creates "file;1234" and then renames it) */
 214                 | ARCHIVE_UNLINK_OLD;
 215         archive_handle->src_fd = fd;
 216         /*archive_handle->offset = 0; - init_handle() did it */
 217
 218         xchdir("/"); /* Install RPM's to root */
 219         setup_unzip_on_fd(archive_handle->src_fd /*, fail_if_not_detected: 1*/);
 220         while (get_header_cpio(archive_handle) == EXIT_SUCCESS)
 221                 continue;
 222 }
 223
 224 static rpm_index **rpm_gettags(int fd, int *num_tags)
 225 {
 226         /* We should never need more than 200 (shrink via realloc later) */
 227         rpm_index **tags = xzalloc(200 * sizeof(tags[0]));
 228         int pass, tagindex = 0;
 229
 230         xlseek(fd, 96, SEEK_CUR); /* Seek past the unused lead */
 231
 232         /* 1st pass is the signature headers, 2nd is the main stuff */
 233         for (pass = 0; pass < 2; pass++) {
 234                 struct rpm_header header;
 235                 rpm_index *tmpindex;
 236                 int storepos;
 237
 238                 xread(fd, &header, sizeof(header));
 239                 if (header.magic_and_ver != htonl(RPM_HEADER_MAGICnVER))
 240                         return NULL; /* Invalid magic, or not version 1 */
 241                 header.size = ntohl(header.size);
 242                 header.entries = ntohl(header.entries);
 243                 storepos = xlseek(fd, 0, SEEK_CUR) + header.entries * 16;
 244
 245                 while (header.entries--) {
 246                         tmpindex = tags[tagindex++] = xmalloc(sizeof(*tmpindex));
 247                         xread(fd, tmpindex, sizeof(*tmpindex));
 248                         tmpindex->tag = ntohl(tmpindex->tag);
 249                         tmpindex->type = ntohl(tmpindex->type);
 250                         tmpindex->count = ntohl(tmpindex->count);
 251                         tmpindex->offset = storepos + ntohl(tmpindex->offset);
 252                         if (pass == 0)
 253                                 tmpindex->tag -= 743;
 254                 }
 255                 storepos = xlseek(fd, header.size, SEEK_CUR); /* Seek past store */
 256                 /* Skip padding to 8 byte boundary after reading signature headers */
 257                 if (pass == 0)
 258                         xlseek(fd, (-storepos) & 0x7, SEEK_CUR);
 259         }
 260         /* realloc tags to save space */
 261         tags = xrealloc(tags, tagindex * sizeof(tags[0]));
 262         *num_tags = tagindex;
 263         /* All done, leave the file at the start of the gzipped cpio archive */
 264         return tags;
 265 }
 266
 267 static int bsearch_rpmtag(const void *key, const void *item)
 268 {
 269         int *tag = (int *)key;
 270         rpm_index **tmp = (rpm_index **) item;
 271         return (*tag - tmp[0]->tag);
 272 }
 273
 274 static int rpm_getcount(int tag)
 275 {
 276         rpm_index **found;
 277         found = bsearch(&tag, mytags, tagcount, sizeof(struct rpmtag *), bsearch_rpmtag);
 278         if (!found)
 279                 return 0;
 280         return found[0]->count;
 281 }
 282
 283 static char *rpm_getstr(int tag, int itemindex)
 284 {
 285         rpm_index **found;
 286         found = bsearch(&tag, mytags, tagcount, sizeof(struct rpmtag *), bsearch_rpmtag);
 287         if (!found || itemindex >= found[0]->count)
 288                 return NULL;
 289         if (found[0]->type == RPM_STRING_TYPE
 290          || found[0]->type == RPM_I18NSTRING_TYPE
 291          || found[0]->type == RPM_STRING_ARRAY_TYPE
 292         ) {
 293                 int n;
 294                 char *tmpstr = (char *) map + found[0]->offset;
 295                 for (n = 0; n < itemindex; n++)
 296                         tmpstr = tmpstr + strlen(tmpstr) + 1;
 297                 return tmpstr;
 298         }
 299         return NULL;
 300 }
 301
 302 static int rpm_getint(int tag, int itemindex)
 303 {
 304         rpm_index **found;
 305         int *tmpint; /* NB: using int8_t* would be easier to code */
 306
 307         /* gcc throws warnings here when sizeof(void*)!=sizeof(int) ...
 308          * it's ok to ignore it because tag won't be used as a pointer */
 309         found = bsearch(&tag, mytags, tagcount, sizeof(struct rpmtag *), bsearch_rpmtag);
 310         if (!found || itemindex >= found[0]->count)
 311                 return -1;
 312
 313         tmpint = (int *) ((char *) map + found[0]->offset);
 314
 315         if (found[0]->type == RPM_INT32_TYPE) {
 316                 tmpint = (int *) ((char *) tmpint + itemindex*4);
 317                 /*return ntohl(*tmpint);*/
 318                 /* int can be != int32_t */
 319                 return ntohl(*(int32_t*)tmpint);
 320         }
 321         if (found[0]->type == RPM_INT16_TYPE) {
 322                 tmpint = (int *) ((char *) tmpint + itemindex*2);
 323                 /* ??? read int, and THEN ntohs() it?? */
 324                 /*return ntohs(*tmpint);*/
 325                 return ntohs(*(int16_t*)tmpint);
 326         }
 327         if (found[0]->type == RPM_INT8_TYPE) {
 328                 tmpint = (int *) ((char *) tmpint + itemindex);
 329                 /* ??? why we don't read byte here??? */
 330                 /*return ntohs(*tmpint);*/
 331                 return *(int8_t*)tmpint;
 332         }
 333         return -1;
 334 }
 335
 336 static void fileaction_dobackup(char *filename, int fileref)
 337 {
 338         struct stat oldfile;
 339         int stat_res;
 340         char *newname;
 341         if (rpm_getint(TAG_FILEFLAGS, fileref) & RPMFILE_CONFIG) {
 342                 /* Only need to backup config files */
 343                 stat_res = lstat(filename, &oldfile);
 344                 if (stat_res == 0 && S_ISREG(oldfile.st_mode)) {
 345                         /* File already exists  - really should check MD5's etc to see if different */
 346                         newname = xasprintf("%s.rpmorig", filename);
 347                         copy_file(filename, newname, FILEUTILS_RECUR | FILEUTILS_PRESERVE_STATUS);
 348                         remove_file(filename, FILEUTILS_RECUR | FILEUTILS_FORCE);
 349                         free(newname);
 350                 }
 351         }
 352 }
 353
 354 static void fileaction_setowngrp(char *filename, int fileref)
 355 {
 356         /* real rpm warns: "user foo does not exist - using <you>" */
 357         struct passwd *pw = getpwnam(rpm_getstr(TAG_FILEUSERNAME, fileref));
 358         int uid = pw ? pw->pw_uid : getuid(); /* or euid? */
 359         struct group *gr = getgrnam(rpm_getstr(TAG_FILEGROUPNAME, fileref));
 360         int gid = gr ? gr->gr_gid : getgid();
 361         chown(filename, uid, gid);
 362 }
 363
 364 static void loop_through_files(int filetag, void (*fileaction)(char *filename, int fileref))
 365 {
 366         int count = 0;
 367         while (rpm_getstr(filetag, count)) {
 368                 char* filename = xasprintf("%s%s",
 369                         rpm_getstr(TAG_DIRNAMES, rpm_getint(TAG_DIRINDEXES, count)),
 370                         rpm_getstr(TAG_BASENAMES, count));
 371                 fileaction(filename, count++);
 372                 free(filename);
 373         }
 374 }