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