busybox/archival/rpm.c

/* vi: set sw=4 ts=4: */
/*
 * Mini rpm applet for busybox
 *
 * Copyright (C) 2001,2002 by Laurence Anderson
 *
 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
 */

#include "libbb.h"
#include "unarchive.h"
#include "rpm.h"

#define RPM_CHAR_TYPE           1
#define RPM_INT8_TYPE           2
#define RPM_INT16_TYPE          3
#define RPM_INT32_TYPE          4
/* #define RPM_INT64_TYPE       5   ---- These aren't supported (yet) */
#define RPM_STRING_TYPE         6
#define RPM_BIN_TYPE            7
#define RPM_STRING_ARRAY_TYPE   8
#define RPM_I18NSTRING_TYPE     9

#define TAG_NAME                1000
#define TAG_VERSION             1001
#define TAG_RELEASE             1002
#define TAG_SUMMARY             1004
#define TAG_DESCRIPTION         1005
#define TAG_BUILDTIME           1006
#define TAG_BUILDHOST           1007
#define TAG_SIZE                1009
#define TAG_VENDOR              1011
#define TAG_LICENSE             1014
#define TAG_PACKAGER            1015
#define TAG_GROUP               1016
#define TAG_URL                 1020
#define TAG_PREIN               1023
#define TAG_POSTIN              1024
#define TAG_FILEFLAGS           1037
#define TAG_FILEUSERNAME        1039
#define TAG_FILEGROUPNAME       1040
#define TAG_SOURCERPM           1044
#define TAG_PREINPROG           1085
#define TAG_POSTINPROG          1086
#define TAG_PREFIXS             1098
#define TAG_DIRINDEXES          1116
#define TAG_BASENAMES           1117
#define TAG_DIRNAMES            1118

#define RPMFILE_CONFIG          (1 << 0)
#define RPMFILE_DOC             (1 << 1)

enum rpm_functions_e {
	rpm_query = 1,
	rpm_install = 2,
	rpm_query_info = 4,
	rpm_query_package = 8,
	rpm_query_list = 16,
	rpm_query_list_doc = 32,
	rpm_query_list_config = 64
};

typedef struct {
	uint32_t tag; /* 4 byte tag */
	uint32_t type; /* 4 byte type */
	uint32_t offset; /* 4 byte offset */
	uint32_t count; /* 4 byte count */
} rpm_index;

static void *map;
static rpm_index **mytags;
static int tagcount;

static void extract_cpio(int fd, const char *source_rpm);
static rpm_index **rpm_gettags(int fd, int *num_tags);
static int bsearch_rpmtag(const void *key, const void *item);
static char *rpm_getstr(int tag, int itemindex);
static int rpm_getint(int tag, int itemindex);
static int rpm_getcount(int tag);
static void fileaction_dobackup(char *filename, int fileref);
static void fileaction_setowngrp(char *filename, int fileref);
static void loop_through_files(int filetag, void (*fileaction)(char *filename, int fileref));

int rpm_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int rpm_main(int argc, char **argv)
{
	int opt = 0, func = 0, rpm_fd, offset;
	const int pagesize = getpagesize();

	while ((opt = getopt(argc, argv, "iqpldc")) != -1) {
		switch (opt) {
		case 'i': /* First arg: Install mode, with q: Information */
			if (!func) func = rpm_install;
			else func |= rpm_query_info;
			break;
		case 'q': /* First arg: Query mode */
			if (func) bb_show_usage();
			func = rpm_query;
			break;
		case 'p': /* Query a package */
			func |= rpm_query_package;
			break;
		case 'l': /* List files in a package */
			func |= rpm_query_list;
			break;
		case 'd': /* List doc files in a package (implies list) */
			func |= rpm_query_list;
			func |= rpm_query_list_doc;
			break;
		case 'c': /* List config files in a package (implies list) */
			func |= rpm_query_list;
			func |= rpm_query_list_config;
			break;
		default:
			bb_show_usage();
		}
	}
	argv += optind;
	//argc -= optind;
	if (!argv[0]) {
		bb_show_usage();
	}

	while (*argv) {
		const char *source_rpm;

		rpm_fd = xopen(*argv++, O_RDONLY);
		mytags = rpm_gettags(rpm_fd, &tagcount);
		if (!mytags)
			bb_error_msg_and_die("error reading rpm header");
		offset = xlseek(rpm_fd, 0, SEEK_CUR);
		/* Mimimum is one page */
		map = mmap(0, offset > pagesize ? (offset + offset % pagesize) : pagesize, PROT_READ, MAP_PRIVATE, rpm_fd, 0);

		source_rpm = rpm_getstr(TAG_SOURCERPM, 0);

		if (func & rpm_install) {
			/* Backup any config files */
			loop_through_files(TAG_BASENAMES, fileaction_dobackup);
			/* Extact the archive */
			extract_cpio(rpm_fd, source_rpm);
			/* Set the correct file uid/gid's */
			loop_through_files(TAG_BASENAMES, fileaction_setowngrp);
		}
		else if ((func & (rpm_query|rpm_query_package)) == (rpm_query|rpm_query_package)) {
			if (!(func & (rpm_query_info|rpm_query_list))) {
				/* If just a straight query, just give package name */
				printf("%s-%s-%s\n", rpm_getstr(TAG_NAME, 0), rpm_getstr(TAG_VERSION, 0), rpm_getstr(TAG_RELEASE, 0));
			}
			if (func & rpm_query_info) {
				/* Do the nice printout */
				time_t bdate_time;
				struct tm *bdate_ptm;
				char bdatestring[50];
				const char *p;

				p = rpm_getstr(TAG_PREFIXS, 0);
				if (!p) p = "(not relocateable)";
				printf("Name        : %-29sRelocations: %s\n", rpm_getstr(TAG_NAME, 0), p);
				p = rpm_getstr(TAG_VENDOR, 0);
				if (!p) p = "(none)";
				printf("Version     : %-34sVendor: %s\n", rpm_getstr(TAG_VERSION, 0), p);
				bdate_time = rpm_getint(TAG_BUILDTIME, 0);
				bdate_ptm = localtime(&bdate_time);
				strftime(bdatestring, 50, "%a %d %b %Y %T %Z", bdate_ptm);
				printf("Release     : %-30sBuild Date: %s\n", rpm_getstr(TAG_RELEASE, 0), bdatestring);
				printf("Install date: %-30sBuild Host: %s\n", "(not installed)", rpm_getstr(TAG_BUILDHOST, 0));
				printf("Group       : %-30sSource RPM: %s\n", rpm_getstr(TAG_GROUP, 0), source_rpm);
				printf("Size        : %-33dLicense: %s\n", rpm_getint(TAG_SIZE, 0), rpm_getstr(TAG_LICENSE, 0));
				printf("URL         : %s\n", rpm_getstr(TAG_URL, 0));
				printf("Summary     : %s\n", rpm_getstr(TAG_SUMMARY, 0));
				printf("Description :\n%s\n", rpm_getstr(TAG_DESCRIPTION, 0));
			}
			if (func & rpm_query_list) {
				int count, it, flags;
				count = rpm_getcount(TAG_BASENAMES);
				for (it = 0; it < count; it++) {
					flags = rpm_getint(TAG_FILEFLAGS, it);
					switch (func & (rpm_query_list_doc|rpm_query_list_config)) {
					case rpm_query_list_doc:
						if (!(flags & RPMFILE_DOC)) continue;
						break;
					case rpm_query_list_config:
						if (!(flags & RPMFILE_CONFIG)) continue;
						break;
					case rpm_query_list_doc|rpm_query_list_config:
						if (!(flags & (RPMFILE_CONFIG|RPMFILE_DOC))) continue;
						break;
					}
					printf("%s%s\n",
						rpm_getstr(TAG_DIRNAMES, rpm_getint(TAG_DIRINDEXES, it)),
						rpm_getstr(TAG_BASENAMES, it));
				}
			}
		}
		free(mytags);
	}
	return 0;
}

static void extract_cpio(int fd, const char *source_rpm)
{
	archive_handle_t *archive_handle;

	if (source_rpm != NULL) {
		/* Binary rpm (it was built from some SRPM), install to root */
		xchdir("/");
	} /* else: SRPM, install to current dir */

	/* Initialize */
	archive_handle = init_handle();
	archive_handle->seek = seek_by_read;
	archive_handle->action_data = data_extract_all;
#if 0 /* For testing (rpm -i only lists the files in internal cpio): */
	archive_handle->action_header = header_list;
	archive_handle->action_data = data_skip;
#endif
	archive_handle->ah_flags = ARCHIVE_RESTORE_DATE | ARCHIVE_CREATE_LEADING_DIRS
		/* compat: overwrite existing files.
		 * try "rpm -i foo.src.rpm" few times in a row -
		 * standard rpm will not complain.
		 * (TODO? real rpm creates "file;1234" and then renames it) */
		| ARCHIVE_UNLINK_OLD;
	archive_handle->src_fd = fd;
	/*archive_handle->offset = 0; - init_handle() did it */

	setup_unzip_on_fd(archive_handle->src_fd /*, fail_if_not_detected: 1*/);
	while (get_header_cpio(archive_handle) == EXIT_SUCCESS)
		continue;
}

static rpm_index **rpm_gettags(int fd, int *num_tags)
{
	/* We should never need more than 200 (shrink via realloc later) */
	rpm_index **tags = xzalloc(200 * sizeof(tags[0]));
	int pass, tagindex = 0;

	xlseek(fd, 96, SEEK_CUR); /* Seek past the unused lead */

	/* 1st pass is the signature headers, 2nd is the main stuff */
	for (pass = 0; pass < 2; pass++) {
		struct rpm_header header;
		rpm_index *tmpindex;
		int storepos;

		xread(fd, &header, sizeof(header));
		if (header.magic_and_ver != htonl(RPM_HEADER_MAGICnVER))
			return NULL; /* Invalid magic, or not version 1 */
		header.size = ntohl(header.size);
		header.entries = ntohl(header.entries);
		storepos = xlseek(fd, 0, SEEK_CUR) + header.entries * 16;

		while (header.entries--) {
			tmpindex = tags[tagindex++] = xmalloc(sizeof(*tmpindex));
			xread(fd, tmpindex, sizeof(*tmpindex));
			tmpindex->tag = ntohl(tmpindex->tag);
			tmpindex->type = ntohl(tmpindex->type);
			tmpindex->count = ntohl(tmpindex->count);
			tmpindex->offset = storepos + ntohl(tmpindex->offset);
			if (pass == 0)
				tmpindex->tag -= 743;
		}
		storepos = xlseek(fd, header.size, SEEK_CUR); /* Seek past store */
		/* Skip padding to 8 byte boundary after reading signature headers */
		if (pass == 0)
			xlseek(fd, (-storepos) & 0x7, SEEK_CUR);
	}
	/* realloc tags to save space */
	tags = xrealloc(tags, tagindex * sizeof(tags[0]));
	*num_tags = tagindex;
	/* All done, leave the file at the start of the gzipped cpio archive */
	return tags;
}

static int bsearch_rpmtag(const void *key, const void *item)
{
	int *tag = (int *)key;
	rpm_index **tmp = (rpm_index **) item;
	return (*tag - tmp[0]->tag);
}

static int rpm_getcount(int tag)
{
	rpm_index **found;
	found = bsearch(&tag, mytags, tagcount, sizeof(struct rpmtag *), bsearch_rpmtag);
	if (!found)
		return 0;
	return found[0]->count;
}

static char *rpm_getstr(int tag, int itemindex)
{
	rpm_index **found;
	found = bsearch(&tag, mytags, tagcount, sizeof(struct rpmtag *), bsearch_rpmtag);
	if (!found || itemindex >= found[0]->count)
		return NULL;
	if (found[0]->type == RPM_STRING_TYPE
	 || found[0]->type == RPM_I18NSTRING_TYPE
	 || found[0]->type == RPM_STRING_ARRAY_TYPE
	) {
		int n;
		char *tmpstr = (char *) map + found[0]->offset;
		for (n = 0; n < itemindex; n++)
			tmpstr = tmpstr + strlen(tmpstr) + 1;
		return tmpstr;
	}
	return NULL;
}

static int rpm_getint(int tag, int itemindex)
{
	rpm_index **found;
	int *tmpint; /* NB: using int8_t* would be easier to code */

	/* gcc throws warnings here when sizeof(void*)!=sizeof(int) ...
	 * it's ok to ignore it because tag won't be used as a pointer */
	found = bsearch(&tag, mytags, tagcount, sizeof(struct rpmtag *), bsearch_rpmtag);
	if (!found || itemindex >= found[0]->count)
		return -1;

	tmpint = (int *) ((char *) map + found[0]->offset);

	if (found[0]->type == RPM_INT32_TYPE) {
		tmpint = (int *) ((char *) tmpint + itemindex*4);
		/*return ntohl(*tmpint);*/
		/* int can be != int32_t */
		return ntohl(*(int32_t*)tmpint);
	}
	if (found[0]->type == RPM_INT16_TYPE) {
		tmpint = (int *) ((char *) tmpint + itemindex*2);
		/* ??? read int, and THEN ntohs() it?? */
		/*return ntohs(*tmpint);*/
		return ntohs(*(int16_t*)tmpint);
	}
	if (found[0]->type == RPM_INT8_TYPE) {
		tmpint = (int *) ((char *) tmpint + itemindex);
		/* ??? why we don't read byte here??? */
		/*return ntohs(*tmpint);*/
		return *(int8_t*)tmpint;
	}
	return -1;
}

static void fileaction_dobackup(char *filename, int fileref)
{
	struct stat oldfile;
	int stat_res;
	char *newname;
	if (rpm_getint(TAG_FILEFLAGS, fileref) & RPMFILE_CONFIG) {
		/* Only need to backup config files */
		stat_res = lstat(filename, &oldfile);
		if (stat_res == 0 && S_ISREG(oldfile.st_mode)) {
			/* File already exists  - really should check MD5's etc to see if different */
			newname = xasprintf("%s.rpmorig", filename);
			copy_file(filename, newname, FILEUTILS_RECUR | FILEUTILS_PRESERVE_STATUS);
			remove_file(filename, FILEUTILS_RECUR | FILEUTILS_FORCE);
			free(newname);
		}
	}
}

static void fileaction_setowngrp(char *filename, int fileref)
{
	/* real rpm warns: "user foo does not exist - using <you>" */
	struct passwd *pw = getpwnam(rpm_getstr(TAG_FILEUSERNAME, fileref));
	int uid = pw ? pw->pw_uid : getuid(); /* or euid? */
	struct group *gr = getgrnam(rpm_getstr(TAG_FILEGROUPNAME, fileref));
	int gid = gr ? gr->gr_gid : getgid();
	chown(filename, uid, gid);
}

static void loop_through_files(int filetag, void (*fileaction)(char *filename, int fileref))
{
	int count = 0;
	while (rpm_getstr(filetag, count)) {
		char* filename = xasprintf("%s%s",
			rpm_getstr(TAG_DIRNAMES, rpm_getint(TAG_DIRINDEXES, count)),
			rpm_getstr(TAG_BASENAMES, count));
		fileaction(filename, count++);
		free(filename);
	}
}
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	}