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
53enum 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
63typedef 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
70static void *map;
71static rpm_index **mytags;
72static int tagcount;
73
74static void extract_cpio(int fd, const char *source_rpm);
75static rpm_index **rpm_gettags(int fd, int *num_tags);
76static int bsearch_rpmtag(const void *key, const void *item);
77static char *rpm_getstr(int tag, int itemindex);
78static int rpm_getint(int tag, int itemindex);
79static int rpm_getcount(int tag);
80static void fileaction_dobackup(char *filename, int fileref);
81static void fileaction_setowngrp(char *filename, int fileref);
82static void loop_through_files(int filetag, void (*fileaction)(char *filename, int fileref));
83
84int rpm_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
85int 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
201static 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
232static 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
275static 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
282static 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
291static 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
310static 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
344static 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
362static 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
372static 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}
383