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