hush/archival/rpm.c

400 lines
13 KiB
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);
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 (!argc) 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 (*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->flags |= ARCHIVE_PRESERVE_DATE;
archive_handle->flags |= ARCHIVE_CREATE_LEADING_DIRS;
archive_handle->src_fd = fd;
archive_handle->offset = 0;
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_RPM_BZ2
&& (magic[0] == 0x42) && (magic[1] == 0x5a)) {
#if BB_MMU
xformer = unpack_bz2_stream;
#else
xformer_prog = "bunzip2";
#endif
/* We can do better, need modifying unpack_bz2_stream to not require
* first 2 bytes. Not very hard to do... I mean, TODO :) */
xlseek(archive_handle->src_fd, -2, SEEK_CUR);
} else
bb_error_msg_and_die("no gzip"
USE_FEATURE_RPM_BZ2("/bzip")
" magic");
} else {
check_header_gzip_or_die(archive_handle->src_fd);
#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 */
archive_handle->src_fd = open_transformer(archive_handle->src_fd, xformer, xformer_prog, xformer_prog, "-cf", "-", NULL);
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(struct rpmtag *));
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;
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(rpm_index));
xread(fd, tmpindex, sizeof(rpm_index));
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(struct rpmtag *)); /* 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)
{
int uid, gid;
uid = xuname2uid(rpm_getstr(TAG_FILEUSERNAME, fileref));
gid = xgroup2gid(rpm_getstr(TAG_FILEGROUPNAME, fileref));
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);
}
}