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https://github.com/sheumann/hush.git
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338 lines
12 KiB
C
338 lines
12 KiB
C
/* vi: set sw=4 ts=4: */
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/*
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* Mini rpm applet for busybox
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*
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* Copyright (C) 2001,2002 by Laurence Anderson
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*
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* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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*/
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#include <stdio.h>
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#include <unistd.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <netinet/in.h> /* For ntohl & htonl function */
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#include <string.h> /* For strncmp */
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#include <sys/mman.h> /* For mmap */
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#include <time.h> /* For ctime */
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#include "busybox.h"
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#include "unarchive.h"
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#define RPM_HEADER_MAGIC "\216\255\350"
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#define RPM_CHAR_TYPE 1
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#define RPM_INT8_TYPE 2
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#define RPM_INT16_TYPE 3
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#define RPM_INT32_TYPE 4
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/* #define RPM_INT64_TYPE 5 ---- These aren't supported (yet) */
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#define RPM_STRING_TYPE 6
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#define RPM_BIN_TYPE 7
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#define RPM_STRING_ARRAY_TYPE 8
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#define RPM_I18NSTRING_TYPE 9
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#define RPMTAG_NAME 1000
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#define RPMTAG_VERSION 1001
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#define RPMTAG_RELEASE 1002
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#define RPMTAG_SUMMARY 1004
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#define RPMTAG_DESCRIPTION 1005
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#define RPMTAG_BUILDTIME 1006
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#define RPMTAG_BUILDHOST 1007
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#define RPMTAG_SIZE 1009
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#define RPMTAG_VENDOR 1011
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#define RPMTAG_LICENSE 1014
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#define RPMTAG_PACKAGER 1015
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#define RPMTAG_GROUP 1016
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#define RPMTAG_URL 1020
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#define RPMTAG_PREIN 1023
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#define RPMTAG_POSTIN 1024
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#define RPMTAG_FILEFLAGS 1037
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#define RPMTAG_FILEUSERNAME 1039
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#define RPMTAG_FILEGROUPNAME 1040
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#define RPMTAG_SOURCERPM 1044
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#define RPMTAG_PREINPROG 1085
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#define RPMTAG_POSTINPROG 1086
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#define RPMTAG_PREFIXS 1098
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#define RPMTAG_DIRINDEXES 1116
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#define RPMTAG_BASENAMES 1117
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#define RPMTAG_DIRNAMES 1118
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#define RPMFILE_CONFIG (1 << 0)
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#define RPMFILE_DOC (1 << 1)
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enum rpm_functions_e {
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rpm_query = 1,
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rpm_install = 2,
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rpm_query_info = 4,
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rpm_query_package = 8,
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rpm_query_list = 16,
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rpm_query_list_doc = 32,
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rpm_query_list_config = 64
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};
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typedef struct {
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uint32_t tag; /* 4 byte tag */
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uint32_t type; /* 4 byte type */
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uint32_t offset; /* 4 byte offset */
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uint32_t count; /* 4 byte count */
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} rpm_index;
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static void *map;
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static rpm_index **mytags;
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static int tagcount;
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void extract_cpio_gz(int fd);
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rpm_index **rpm_gettags(int fd, int *num_tags);
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int bsearch_rpmtag(const void *key, const void *item);
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char *rpm_getstring(int tag, int itemindex);
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int rpm_getint(int tag, int itemindex);
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int rpm_getcount(int tag);
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void exec_script(int progtag, int datatag, char *prefix);
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void fileaction_dobackup(char *filename, int fileref);
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void fileaction_setowngrp(char *filename, int fileref);
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void fileaction_list(char *filename, int itemno);
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void loop_through_files(int filetag, void (*fileaction)(char *filename, int fileref));
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int rpm_main(int argc, char **argv)
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{
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int opt = 0, func = 0, rpm_fd, offset;
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while ((opt = getopt(argc, argv, "iqpldc")) != -1) {
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switch (opt) {
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case 'i': // First arg: Install mode, with q: Information
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if (!func) func |= rpm_install;
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else func |= rpm_query_info;
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break;
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case 'q': // First arg: Query mode
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if (!func) func |= rpm_query;
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else bb_show_usage();
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break;
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case 'p': // Query a package
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func |= rpm_query_package;
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break;
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case 'l': // List files in a package
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func |= rpm_query_list;
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break;
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case 'd': // List doc files in a package (implies list)
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func |= rpm_query_list;
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func |= rpm_query_list_doc;
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break;
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case 'c': // List config files in a package (implies list)
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func |= rpm_query_list;
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func |= rpm_query_list_config;
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break;
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default:
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bb_show_usage();
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}
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}
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if (optind == argc) bb_show_usage();
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while (optind < argc) {
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rpm_fd = bb_xopen(argv[optind], O_RDONLY);
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mytags = rpm_gettags(rpm_fd, (int *) &tagcount);
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offset = lseek(rpm_fd, 0, SEEK_CUR);
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if (!mytags) { printf("Error reading rpm header\n"); exit(-1); }
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map = mmap(0, offset > getpagesize() ? (offset + offset % getpagesize()) : getpagesize(), PROT_READ, MAP_PRIVATE, rpm_fd, 0); // Mimimum is one page
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if (func & rpm_install) {
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loop_through_files(RPMTAG_BASENAMES, fileaction_dobackup); /* Backup any config files */
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extract_cpio_gz(rpm_fd); // Extact the archive
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loop_through_files(RPMTAG_BASENAMES, fileaction_setowngrp); /* Set the correct file uid/gid's */
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} else if (func & rpm_query && func & rpm_query_package) {
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if (!((func & rpm_query_info) || (func & rpm_query_list))) { // If just a straight query, just give package name
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printf("%s-%s-%s\n", rpm_getstring(RPMTAG_NAME, 0), rpm_getstring(RPMTAG_VERSION, 0), rpm_getstring(RPMTAG_RELEASE, 0));
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}
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if (func & rpm_query_info) {
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/* Do the nice printout */
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time_t bdate_time;
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struct tm *bdate;
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char bdatestring[50];
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printf("Name : %-29sRelocations: %s\n", rpm_getstring(RPMTAG_NAME, 0), rpm_getstring(RPMTAG_PREFIXS, 0) ? rpm_getstring(RPMTAG_PREFIXS, 0) : "(not relocateable)");
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printf("Version : %-34sVendor: %s\n", rpm_getstring(RPMTAG_VERSION, 0), rpm_getstring(RPMTAG_VENDOR, 0) ? rpm_getstring(RPMTAG_VENDOR, 0) : "(none)");
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bdate_time = rpm_getint(RPMTAG_BUILDTIME, 0);
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bdate = localtime((time_t *) &bdate_time);
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strftime(bdatestring, 50, "%a %d %b %Y %T %Z", bdate);
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printf("Release : %-30sBuild Date: %s\n", rpm_getstring(RPMTAG_RELEASE, 0), bdatestring);
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printf("Install date: %-30sBuild Host: %s\n", "(not installed)", rpm_getstring(RPMTAG_BUILDHOST, 0));
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printf("Group : %-30sSource RPM: %s\n", rpm_getstring(RPMTAG_GROUP, 0), rpm_getstring(RPMTAG_SOURCERPM, 0));
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printf("Size : %-33dLicense: %s\n", rpm_getint(RPMTAG_SIZE, 0), rpm_getstring(RPMTAG_LICENSE, 0));
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printf("URL : %s\n", rpm_getstring(RPMTAG_URL, 0));
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printf("Summary : %s\n", rpm_getstring(RPMTAG_SUMMARY, 0));
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printf("Description :\n%s\n", rpm_getstring(RPMTAG_DESCRIPTION, 0));
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}
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if (func & rpm_query_list) {
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int count, it, flags;
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count = rpm_getcount(RPMTAG_BASENAMES);
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for (it = 0; it < count; it++) {
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flags = rpm_getint(RPMTAG_FILEFLAGS, it);
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switch ((func & rpm_query_list_doc) + (func & rpm_query_list_config))
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{
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case rpm_query_list_doc: if (!(flags & RPMFILE_DOC)) continue; break;
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case rpm_query_list_config: if (!(flags & RPMFILE_CONFIG)) continue; break;
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case rpm_query_list_doc + rpm_query_list_config: if (!((flags & RPMFILE_CONFIG) || (flags & RPMFILE_DOC))) continue; break;
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}
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printf("%s%s\n", rpm_getstring(RPMTAG_DIRNAMES, rpm_getint(RPMTAG_DIRINDEXES, it)), rpm_getstring(RPMTAG_BASENAMES, it));
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}
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}
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}
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optind++;
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free (mytags);
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}
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return 0;
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}
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void extract_cpio_gz(int fd) {
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archive_handle_t *archive_handle;
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unsigned char magic[2];
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/* Initialise */
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archive_handle = init_handle();
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archive_handle->seek = seek_by_char;
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//archive_handle->action_header = header_list;
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archive_handle->action_data = data_extract_all;
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archive_handle->flags |= ARCHIVE_PRESERVE_DATE;
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archive_handle->flags |= ARCHIVE_CREATE_LEADING_DIRS;
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archive_handle->src_fd = fd;
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archive_handle->offset = 0;
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bb_xread_all(archive_handle->src_fd, &magic, 2);
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if ((magic[0] != 0x1f) || (magic[1] != 0x8b)) {
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bb_error_msg_and_die("Invalid gzip magic");
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}
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check_header_gzip(archive_handle->src_fd);
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bb_xchdir("/"); // Install RPM's to root
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archive_handle->src_fd = open_transformer(archive_handle->src_fd, inflate_gunzip);
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archive_handle->offset = 0;
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while (get_header_cpio(archive_handle) == EXIT_SUCCESS);
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}
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rpm_index **rpm_gettags(int fd, int *num_tags)
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{
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rpm_index **tags = xzalloc(200 * sizeof(struct rpmtag *)); /* We should never need mode than 200, and realloc later */
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int pass, tagindex = 0;
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lseek(fd, 96, SEEK_CUR); /* Seek past the unused lead */
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for (pass = 0; pass < 2; pass++) { /* 1st pass is the signature headers, 2nd is the main stuff */
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struct {
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char magic[3]; /* 3 byte magic: 0x8e 0xad 0xe8 */
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uint8_t version; /* 1 byte version number */
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uint32_t reserved; /* 4 bytes reserved */
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uint32_t entries; /* Number of entries in header (4 bytes) */
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uint32_t size; /* Size of store (4 bytes) */
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} header;
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rpm_index *tmpindex;
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int storepos;
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read(fd, &header, sizeof(header));
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if (strncmp((char *) &header.magic, RPM_HEADER_MAGIC, 3) != 0) return NULL; /* Invalid magic */
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if (header.version != 1) return NULL; /* This program only supports v1 headers */
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header.size = ntohl(header.size);
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header.entries = ntohl(header.entries);
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storepos = lseek(fd,0,SEEK_CUR) + header.entries * 16;
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while (header.entries--) {
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tmpindex = tags[tagindex++] = xmalloc(sizeof(rpm_index));
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read(fd, tmpindex, sizeof(rpm_index));
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tmpindex->tag = ntohl(tmpindex->tag); tmpindex->type = ntohl(tmpindex->type); tmpindex->count = ntohl(tmpindex->count);
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tmpindex->offset = storepos + ntohl(tmpindex->offset);
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if (pass==0) tmpindex->tag -= 743;
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}
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lseek(fd, header.size, SEEK_CUR); /* Seek past store */
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if (pass==0) lseek(fd, (8 - (lseek(fd,0,SEEK_CUR) % 8)) % 8, SEEK_CUR); /* Skip padding to 8 byte boundary after reading signature headers */
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}
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tags = realloc(tags, tagindex * sizeof(struct rpmtag *)); /* realloc tags to save space */
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*num_tags = tagindex;
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return tags; /* All done, leave the file at the start of the gzipped cpio archive */
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}
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int bsearch_rpmtag(const void *key, const void *item)
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{
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int *tag = (int *)key;
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rpm_index **tmp = (rpm_index **) item;
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return (*tag - tmp[0]->tag);
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}
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int rpm_getcount(int tag)
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{
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rpm_index **found;
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found = bsearch(&tag, mytags, tagcount, sizeof(struct rpmtag *), bsearch_rpmtag);
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if (!found) return 0;
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else return found[0]->count;
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}
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char *rpm_getstring(int tag, int itemindex)
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{
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rpm_index **found;
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found = bsearch(&tag, mytags, tagcount, sizeof(struct rpmtag *), bsearch_rpmtag);
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if (!found || itemindex >= found[0]->count) return NULL;
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if (found[0]->type == RPM_STRING_TYPE || found[0]->type == RPM_I18NSTRING_TYPE || found[0]->type == RPM_STRING_ARRAY_TYPE) {
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int n;
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char *tmpstr = (char *) (map + found[0]->offset);
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for (n=0; n < itemindex; n++) tmpstr = tmpstr + strlen(tmpstr) + 1;
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return tmpstr;
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} else return NULL;
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}
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int rpm_getint(int tag, int itemindex)
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{
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rpm_index **found;
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int n, *tmpint;
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/* gcc throws warnings here when sizeof(void*)!=sizeof(int) ...
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* it's ok to ignore it because tag won't be used as a pointer */
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found = bsearch(&tag, mytags, tagcount, sizeof(struct rpmtag *), bsearch_rpmtag);
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if (!found || itemindex >= found[0]->count) return -1;
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tmpint = (int *) (map + found[0]->offset);
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if (found[0]->type == RPM_INT32_TYPE) {
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for (n=0; n<itemindex; n++) tmpint = (int *) ((void *) tmpint + 4);
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return ntohl(*tmpint);
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} else if (found[0]->type == RPM_INT16_TYPE) {
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for (n=0; n<itemindex; n++) tmpint = (int *) ((void *) tmpint + 2);
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return ntohs(*tmpint);
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} else if (found[0]->type == RPM_INT8_TYPE) {
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for (n=0; n<itemindex; n++) tmpint = (int *) ((void *) tmpint + 1);
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return ntohs(*tmpint);
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} else return -1;
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}
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void fileaction_dobackup(char *filename, int fileref)
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{
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struct stat oldfile;
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int stat_res;
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char *newname;
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if (rpm_getint(RPMTAG_FILEFLAGS, fileref) & RPMFILE_CONFIG) { /* Only need to backup config files */
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stat_res = lstat (filename, &oldfile);
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if (stat_res == 0 && S_ISREG(oldfile.st_mode)) { /* File already exists - really should check MD5's etc to see if different */
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newname = bb_xstrdup(filename);
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newname = strcat(newname, ".rpmorig");
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copy_file(filename, newname, FILEUTILS_RECUR | FILEUTILS_PRESERVE_STATUS);
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remove_file(filename, FILEUTILS_RECUR | FILEUTILS_FORCE);
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free(newname);
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}
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}
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}
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void fileaction_setowngrp(char *filename, int fileref)
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{
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int uid, gid;
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uid = bb_xgetpwnam(rpm_getstring(RPMTAG_FILEUSERNAME, fileref));
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gid = bb_xgetgrnam(rpm_getstring(RPMTAG_FILEGROUPNAME, fileref));
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chown (filename, uid, gid);
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}
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void fileaction_list(char *filename, int ATTRIBUTE_UNUSED fileref)
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{
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printf("%s\n", filename);
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}
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void loop_through_files(int filetag, void (*fileaction)(char *filename, int fileref))
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{
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int count = 0;
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while (rpm_getstring(filetag, count)) {
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char * filename = bb_xasprintf("%s%s",
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rpm_getstring(RPMTAG_DIRNAMES, rpm_getint(RPMTAG_DIRINDEXES,
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count)), rpm_getstring(RPMTAG_BASENAMES, count));
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fileaction(filename, count++);
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free(filename);
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}
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}
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