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 52enum 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 62typedef 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 69static void *map; 70static rpm_index **mytags; 71static int tagcount; 72 73static void extract_cpio_gz(int fd); 74static rpm_index **rpm_gettags(int fd, int *num_tags); 75static int bsearch_rpmtag(const void *key, const void *item); 76static char *rpm_getstr(int tag, int itemindex); 77static int rpm_getint(int tag, int itemindex); 78static int rpm_getcount(int tag); 79static void fileaction_dobackup(char *filename, int fileref); 80static void fileaction_setowngrp(char *filename, int fileref); 81static void loop_through_files(int filetag, void (*fileaction)(char *filename, int fileref)); 82 83int rpm_main(int argc, char **argv); 84int 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 188static 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 248static 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 297static 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 304static 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 313static 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 329static 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 363static 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 381static 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 389static 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} 400