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	niro	532	/* 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	niro	816	#include "libbb.h"
11	niro	532	#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	niro	816	int rpm_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
84	niro	532	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	niro	816	//argc -= optind;
119			if (!argv[0]) bb_show_usage();
120	niro	532
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	niro	816	static void extract_cpio_gz(int fd)
189			{
190	niro	532	archive_handle_t *archive_handle;
191			unsigned char magic[2];
192	niro	816	#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	niro	532
200	niro	816	/* Initialize */
201	niro	532	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	niro	816	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	niro	532	archive_handle->src_fd = fd;
212	niro	816	/archive_handle->offset = 0; - init_handle() did it /
213	niro	532
214	niro	816	// TODO: open_zipped does the same
215
216	niro	532	xread(archive_handle->src_fd, &magic, 2);
217	niro	816	#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	niro	532	}
242	niro	816
243	niro	532	xchdir("/"); /* Install RPM's to root */
244	niro	816	open_transformer(archive_handle->src_fd, xformer, xformer_prog);
245	niro	532	archive_handle->offset = 0;
246			while (get_header_cpio(archive_handle) == EXIT_SUCCESS)
247	niro	816	continue;
248	niro	532	}
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	niro	816	rpm_index *tags = xzalloc(200 sizeof(tags[0]));
255	niro	532	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	niro	816	struct BUG_header {
269			char BUG_header[sizeof(header) == 16 ? 1 : -1];
270			};
271	niro	532	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	niro	816	tmpindex = tags[tagindex++] = xmalloc(sizeof(*tmpindex));
285			xread(fd, tmpindex, sizeof(*tmpindex));
286	niro	532	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	niro	816	if (pass == 0)
291	niro	532	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	niro	816	if (pass == 0)
296	niro	532	xlseek(fd, (8 - (xlseek(fd,0,SEEK_CUR) % 8)) % 8, SEEK_CUR);
297			}
298	niro	816	tags = xrealloc(tags, tagindex * sizeof(tags[0])); /* realloc tags to save space */
299	niro	532	*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	niro	816	/* 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	niro	532	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			}