Contents of /tags/mkinitrd-6_4_0/busybox/archival/rpm.c
Parent Directory | Revision Log
Revision 1313 -
(show annotations)
(download)
Fri May 27 18:20:23 2011 UTC (13 years, 4 months ago) by niro
File MIME type: text/plain
File size: 12344 byte(s)
Fri May 27 18:20:23 2011 UTC (13 years, 4 months ago) by niro
File MIME type: text/plain
File size: 12344 byte(s)
tagged 'mkinitrd-6_4_0'
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 | } |