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"

#define RPM_HEADER_MAGIC        "\216\255\350"
#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_gz(int fd);
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) {
		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);

		if (func & rpm_install) {
			/* Backup any config files */
			loop_through_files(TAG_BASENAMES, fileaction_dobackup);
			/* Extact the archive */
			extract_cpio_gz(rpm_fd);
			/* 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;
				char bdatestring[50];
				printf("Name        : %-29sRelocations: %s\n", rpm_getstr(TAG_NAME, 0), rpm_getstr(TAG_PREFIXS, 0) ? rpm_getstr(TAG_PREFIXS, 0) : "(not relocateable)");
				printf("Version     : %-34sVendor: %s\n", rpm_getstr(TAG_VERSION, 0), rpm_getstr(TAG_VENDOR, 0) ? rpm_getstr(TAG_VENDOR, 0) : "(none)");
				bdate_time = rpm_getint(TAG_BUILDTIME, 0);
				bdate = localtime((time_t *) &bdate_time);
				strftime(bdatestring, 50, "%a %d %b %Y %T %Z", bdate);
				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), rpm_getstr(TAG_SOURCERPM, 0));
				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_gz(int fd)
{
	archive_handle_t *archive_handle;
	unsigned char magic[2];
#if BB_MMU
	USE_DESKTOP(long long) int FAST_FUNC (*xformer)(int src_fd, int dst_fd);
	enum { xformer_prog = 0 };
#else
	enum { xformer = 0 };
	const char *xformer_prog;
#endif

	/* Initialize */
	archive_handle = init_handle();
	archive_handle->seek = seek_by_read;
	//archive_handle->action_header = header_list;
	archive_handle->action_data = data_extract_all;
	archive_handle->ah_flags = ARCHIVE_PRESERVE_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_EXTRACT_UNCONDITIONAL;
	archive_handle->src_fd = fd;
	/*archive_handle->offset = 0; - init_handle() did it */

// TODO: open_zipped does the same

	xread(archive_handle->src_fd, &magic, 2);
#if BB_MMU
	xformer = unpack_gz_stream;
#else
	xformer_prog = "gunzip";
#endif
	if (magic[0] != 0x1f || magic[1] != 0x8b) {
		if (!ENABLE_FEATURE_SEAMLESS_BZ2
		 || magic[0] != 'B' || magic[1] != 'Z'
		) {
			bb_error_msg_and_die("no gzip"
				USE_FEATURE_SEAMLESS_BZ2("/bzip2")
				" magic");
		}
#if BB_MMU
		xformer = unpack_bz2_stream;
#else
		xformer_prog = "bunzip2";
#endif
	} else {
#if !BB_MMU
		/* NOMMU version of open_transformer execs an external unzipper that should
		 * have the file position at the start of the file */
		xlseek(archive_handle->src_fd, 0, SEEK_SET);
#endif
	}

	xchdir("/"); /* Install RPM's to root */
	open_transformer(archive_handle->src_fd, xformer, xformer_prog);
	archive_handle->offset = 0;
	while (get_header_cpio(archive_handle) == EXIT_SUCCESS)
		continue;
}


static rpm_index **rpm_gettags(int fd, int *num_tags)
{
	/* We should never need mode than 200, and 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 {
			char magic[3]; /* 3 byte magic: 0x8e 0xad 0xe8 */
			uint8_t version; /* 1 byte version number */
			uint32_t reserved; /* 4 bytes reserved */
			uint32_t entries; /* Number of entries in header (4 bytes) */
			uint32_t size; /* Size of store (4 bytes) */
		} header;
		struct BUG_header {
			char BUG_header[sizeof(header) == 16 ? 1 : -1];
		};
		rpm_index *tmpindex;
		int storepos;

		xread(fd, &header, sizeof(header));
		if (strncmp((char *) &header.magic, RPM_HEADER_MAGIC, 3) != 0)
			return NULL; /* Invalid magic */
		if (header.version != 1)
			return NULL; /* This program only supports v1 headers */
		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;
		}
		xlseek(fd, header.size, SEEK_CUR); /* Seek past store */
		/* Skip padding to 8 byte boundary after reading signature headers */
		if (pass == 0)
			xlseek(fd, (8 - (xlseek(fd,0,SEEK_CUR) % 8)) % 8, SEEK_CUR);
	}
	tags = xrealloc(tags, tagindex * sizeof(tags[0])); /* realloc tags to save space */
	*num_tags = tagindex;
	return tags; /* All done, leave the file at the start of the gzipped cpio archive */
}

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 *) (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
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
52	enum 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
62	typedef 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
69	static void *map;
70	static rpm_index **mytags;
71	static int tagcount;
72
73	static void extract_cpio_gz(int fd);
74	static rpm_index *rpm_gettags(int fd, int num_tags);
75	static int bsearch_rpmtag(const void key, const void item);
76	static char *rpm_getstr(int tag, int itemindex);
77	static int rpm_getint(int tag, int itemindex);
78	static int rpm_getcount(int tag);
79	static void fileaction_dobackup(char *filename, int fileref);
80	static void fileaction_setowngrp(char *filename, int fileref);
81	static void loop_through_files(int filetag, void (fileaction)(char filename, int fileref));
82
83	int rpm_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
84	int 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 (!argv[0]) 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
188	static 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 FAST_FUNC (*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->ah_flags = ARCHIVE_PRESERVE_DATE \| ARCHIVE_CREATE_LEADING_DIRS
206	/* compat: overwrite existing files.
207	* try "rpm -i foo.src.rpm" few times in a row -
208	* standard rpm will not complain.
209	* (TODO? real rpm creates "file;1234" and then renames it) */
210	\| ARCHIVE_EXTRACT_UNCONDITIONAL;
211	archive_handle->src_fd = fd;
212	/archive_handle->offset = 0; - init_handle() did it /
213
214	// TODO: open_zipped does the same
215
216	xread(archive_handle->src_fd, &magic, 2);
217	#if BB_MMU
218	xformer = unpack_gz_stream;
219	#else
220	xformer_prog = "gunzip";
221	#endif
222	if (magic[0] != 0x1f \|\| magic[1] != 0x8b) {
223	if (!ENABLE_FEATURE_SEAMLESS_BZ2
224	\|\| magic[0] != 'B' \|\| magic[1] != 'Z'
225	) {
226	bb_error_msg_and_die("no gzip"
227	USE_FEATURE_SEAMLESS_BZ2("/bzip2")
228	" magic");
229	}
230	#if BB_MMU
231	xformer = unpack_bz2_stream;
232	#else
233	xformer_prog = "bunzip2";
234	#endif
235	} else {
236	#if !BB_MMU
237	/* NOMMU version of open_transformer execs an external unzipper that should
238	* have the file position at the start of the file */
239	xlseek(archive_handle->src_fd, 0, SEEK_SET);
240	#endif
241	}
242
243	xchdir("/"); /* Install RPM's to root */
244	open_transformer(archive_handle->src_fd, xformer, xformer_prog);
245	archive_handle->offset = 0;
246	while (get_header_cpio(archive_handle) == EXIT_SUCCESS)
247	continue;
248	}
249
250
251	static rpm_index *rpm_gettags(int fd, int num_tags)
252	{
253	/* We should never need mode than 200, and realloc later */
254	rpm_index *tags = xzalloc(200 sizeof(tags[0]));
255	int pass, tagindex = 0;
256
257	xlseek(fd, 96, SEEK_CUR); /* Seek past the unused lead */
258
259	/* 1st pass is the signature headers, 2nd is the main stuff */
260	for (pass = 0; pass < 2; pass++) {
261	struct {
262	char magic[3]; /* 3 byte magic: 0x8e 0xad 0xe8 */
263	uint8_t version; /* 1 byte version number */
264	uint32_t reserved; /* 4 bytes reserved */
265	uint32_t entries; /* Number of entries in header (4 bytes) */
266	uint32_t size; /* Size of store (4 bytes) */
267	} header;
268	struct BUG_header {
269	char BUG_header[sizeof(header) == 16 ? 1 : -1];
270	};
271	rpm_index *tmpindex;
272	int storepos;
273
274	xread(fd, &header, sizeof(header));
275	if (strncmp((char *) &header.magic, RPM_HEADER_MAGIC, 3) != 0)
276	return NULL; /* Invalid magic */
277	if (header.version != 1)
278	return NULL; /* This program only supports v1 headers */
279	header.size = ntohl(header.size);
280	header.entries = ntohl(header.entries);
281	storepos = xlseek(fd,0,SEEK_CUR) + header.entries * 16;
282
283	while (header.entries--) {
284	tmpindex = tags[tagindex++] = xmalloc(sizeof(*tmpindex));
285	xread(fd, tmpindex, sizeof(*tmpindex));
286	tmpindex->tag = ntohl(tmpindex->tag);
287	tmpindex->type = ntohl(tmpindex->type);
288	tmpindex->count = ntohl(tmpindex->count);
289	tmpindex->offset = storepos + ntohl(tmpindex->offset);
290	if (pass == 0)
291	tmpindex->tag -= 743;
292	}
293	xlseek(fd, header.size, SEEK_CUR); /* Seek past store */
294	/* Skip padding to 8 byte boundary after reading signature headers */
295	if (pass == 0)
296	xlseek(fd, (8 - (xlseek(fd,0,SEEK_CUR) % 8)) % 8, SEEK_CUR);
297	}
298	tags = xrealloc(tags, tagindex * sizeof(tags[0])); /* realloc tags to save space */
299	*num_tags = tagindex;
300	return tags; /* All done, leave the file at the start of the gzipped cpio archive */
301	}
302
303	static int bsearch_rpmtag(const void key, const void item)
304	{
305	int tag = (int )key;
306	rpm_index tmp = (rpm_index ) item;
307	return (*tag - tmp[0]->tag);
308	}
309
310	static int rpm_getcount(int tag)
311	{
312	rpm_index **found;
313	found = bsearch(&tag, mytags, tagcount, sizeof(struct rpmtag *), bsearch_rpmtag);
314	if (!found)
315	return 0;
316	return found[0]->count;
317	}
318
319	static char *rpm_getstr(int tag, int itemindex)
320	{
321	rpm_index **found;
322	found = bsearch(&tag, mytags, tagcount, sizeof(struct rpmtag *), bsearch_rpmtag);
323	if (!found \|\| itemindex >= found[0]->count)
324	return NULL;
325	if (found[0]->type == RPM_STRING_TYPE \|\| found[0]->type == RPM_I18NSTRING_TYPE \|\| found[0]->type == RPM_STRING_ARRAY_TYPE) {
326	int n;
327	char tmpstr = (char ) (map + found[0]->offset);
328	for (n=0; n < itemindex; n++)
329	tmpstr = tmpstr + strlen(tmpstr) + 1;
330	return tmpstr;
331	}
332	return NULL;
333	}
334
335	static int rpm_getint(int tag, int itemindex)
336	{
337	rpm_index **found;
338	int tmpint; / NB: using int8_t* would be easier to code */
339
340	/* gcc throws warnings here when sizeof(void*)!=sizeof(int) ...
341	* it's ok to ignore it because tag won't be used as a pointer */
342	found = bsearch(&tag, mytags, tagcount, sizeof(struct rpmtag *), bsearch_rpmtag);
343	if (!found \|\| itemindex >= found[0]->count)
344	return -1;
345
346	tmpint = (int *) (map + found[0]->offset);
347
348	if (found[0]->type == RPM_INT32_TYPE) {
349	tmpint = (int ) ((char ) tmpint + itemindex*4);
350	/return ntohl(tmpint);*/
351	/* int can be != int32_t */
352	return ntohl((int32_t)tmpint);
353	}
354	if (found[0]->type == RPM_INT16_TYPE) {
355	tmpint = (int ) ((char ) tmpint + itemindex*2);
356	/* ??? read int, and THEN ntohs() it?? */
357	/return ntohs(tmpint);*/
358	return ntohs((int16_t)tmpint);
359	}
360	if (found[0]->type == RPM_INT8_TYPE) {
361	tmpint = (int ) ((char ) tmpint + itemindex);
362	/* ??? why we don't read byte here??? */
363	/return ntohs(tmpint);*/
364	return (int8_t)tmpint;
365	}
366	return -1;
367	}
368
369	static void fileaction_dobackup(char *filename, int fileref)
370	{
371	struct stat oldfile;
372	int stat_res;
373	char *newname;
374	if (rpm_getint(TAG_FILEFLAGS, fileref) & RPMFILE_CONFIG) {
375	/* Only need to backup config files */
376	stat_res = lstat(filename, &oldfile);
377	if (stat_res == 0 && S_ISREG(oldfile.st_mode)) {
378	/* File already exists - really should check MD5's etc to see if different */
379	newname = xasprintf("%s.rpmorig", filename);
380	copy_file(filename, newname, FILEUTILS_RECUR \| FILEUTILS_PRESERVE_STATUS);
381	remove_file(filename, FILEUTILS_RECUR \| FILEUTILS_FORCE);
382	free(newname);
383	}
384	}
385	}
386
387	static void fileaction_setowngrp(char *filename, int fileref)
388	{
389	/* real rpm warns: "user foo does not exist - using <you>" */
390	struct passwd *pw = getpwnam(rpm_getstr(TAG_FILEUSERNAME, fileref));
391	int uid = pw ? pw->pw_uid : getuid(); /* or euid? */
392	struct group *gr = getgrnam(rpm_getstr(TAG_FILEGROUPNAME, fileref));
393	int gid = gr ? gr->gr_gid : getgid();
394	chown(filename, uid, gid);
395	}
396
397	static void loop_through_files(int filetag, void (fileaction)(char filename, int fileref))
398	{
399	int count = 0;
400	while (rpm_getstr(filetag, count)) {
401	char* filename = xasprintf("%s%s",
402	rpm_getstr(TAG_DIRNAMES, rpm_getint(TAG_DIRINDEXES, count)),
403	rpm_getstr(TAG_BASENAMES, count));
404	fileaction(filename, count++);
405	free(filename);
406	}
407	}