1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * Mini rpm applet for busybox
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4 | *
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5 | * Copyright (C) 2001,2002 by Laurence Anderson
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6 | *
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7 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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8 | */
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9 |
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10 | #include <stdio.h>
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11 | #include <unistd.h>
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12 | #include <signal.h>
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13 | #include <stdlib.h>
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14 | #include <fcntl.h>
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15 | #include <netinet/in.h> /* For ntohl & htonl function */
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16 | #include <string.h> /* For strncmp */
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17 | #include <sys/mman.h> /* For mmap */
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18 | #include <time.h> /* For ctime */
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19 |
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20 | #include "busybox.h"
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21 | #include "unarchive.h"
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22 |
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23 | #define RPM_HEADER_MAGIC "\216\255\350"
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24 | #define RPM_CHAR_TYPE 1
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25 | #define RPM_INT8_TYPE 2
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26 | #define RPM_INT16_TYPE 3
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27 | #define RPM_INT32_TYPE 4
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28 | /* #define RPM_INT64_TYPE 5 ---- These aren't supported (yet) */
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29 | #define RPM_STRING_TYPE 6
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30 | #define RPM_BIN_TYPE 7
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31 | #define RPM_STRING_ARRAY_TYPE 8
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32 | #define RPM_I18NSTRING_TYPE 9
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33 |
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34 | #define RPMTAG_NAME 1000
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35 | #define RPMTAG_VERSION 1001
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36 | #define RPMTAG_RELEASE 1002
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37 | #define RPMTAG_SUMMARY 1004
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38 | #define RPMTAG_DESCRIPTION 1005
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39 | #define RPMTAG_BUILDTIME 1006
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40 | #define RPMTAG_BUILDHOST 1007
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41 | #define RPMTAG_SIZE 1009
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42 | #define RPMTAG_VENDOR 1011
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43 | #define RPMTAG_LICENSE 1014
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44 | #define RPMTAG_PACKAGER 1015
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45 | #define RPMTAG_GROUP 1016
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46 | #define RPMTAG_URL 1020
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47 | #define RPMTAG_PREIN 1023
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48 | #define RPMTAG_POSTIN 1024
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49 | #define RPMTAG_FILEFLAGS 1037
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50 | #define RPMTAG_FILEUSERNAME 1039
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51 | #define RPMTAG_FILEGROUPNAME 1040
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52 | #define RPMTAG_SOURCERPM 1044
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53 | #define RPMTAG_PREINPROG 1085
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54 | #define RPMTAG_POSTINPROG 1086
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55 | #define RPMTAG_PREFIXS 1098
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56 | #define RPMTAG_DIRINDEXES 1116
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57 | #define RPMTAG_BASENAMES 1117
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58 | #define RPMTAG_DIRNAMES 1118
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59 | #define RPMFILE_CONFIG (1 << 0)
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60 | #define RPMFILE_DOC (1 << 1)
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61 |
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62 | enum rpm_functions_e {
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63 | rpm_query = 1,
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64 | rpm_install = 2,
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65 | rpm_query_info = 4,
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66 | rpm_query_package = 8,
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67 | rpm_query_list = 16,
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68 | rpm_query_list_doc = 32,
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69 | rpm_query_list_config = 64
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70 | };
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71 |
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72 | typedef struct {
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73 | uint32_t tag; /* 4 byte tag */
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74 | uint32_t type; /* 4 byte type */
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75 | uint32_t offset; /* 4 byte offset */
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76 | uint32_t count; /* 4 byte count */
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77 | } rpm_index;
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78 |
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79 | static void *map;
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80 | static rpm_index **mytags;
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81 | static int tagcount;
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82 |
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83 | void extract_cpio_gz(int fd);
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84 | rpm_index **rpm_gettags(int fd, int *num_tags);
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85 | int bsearch_rpmtag(const void *key, const void *item);
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86 | char *rpm_getstring(int tag, int itemindex);
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87 | int rpm_getint(int tag, int itemindex);
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88 | int rpm_getcount(int tag);
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89 | void exec_script(int progtag, int datatag, char *prefix);
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90 | void fileaction_dobackup(char *filename, int fileref);
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91 | void fileaction_setowngrp(char *filename, int fileref);
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92 | void fileaction_list(char *filename, int itemno);
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93 | void loop_through_files(int filetag, void (*fileaction)(char *filename, int fileref));
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94 |
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95 | int rpm_main(int argc, char **argv)
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96 | {
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97 | int opt = 0, func = 0, rpm_fd, offset;
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98 |
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99 | while ((opt = getopt(argc, argv, "iqpldc")) != -1) {
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100 | switch (opt) {
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101 | case 'i': // First arg: Install mode, with q: Information
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102 | if (!func) func |= rpm_install;
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103 | else func |= rpm_query_info;
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104 | break;
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105 | case 'q': // First arg: Query mode
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106 | if (!func) func |= rpm_query;
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107 | else bb_show_usage();
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108 | break;
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109 | case 'p': // Query a package
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110 | func |= rpm_query_package;
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111 | break;
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112 | case 'l': // List files in a package
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113 | func |= rpm_query_list;
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114 | break;
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115 | case 'd': // List doc files in a package (implies list)
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116 | func |= rpm_query_list;
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117 | func |= rpm_query_list_doc;
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118 | break;
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119 | case 'c': // List config files in a package (implies list)
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120 | func |= rpm_query_list;
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121 | func |= rpm_query_list_config;
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122 | break;
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123 | default:
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124 | bb_show_usage();
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125 | }
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126 | }
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127 |
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128 | if (optind == argc) bb_show_usage();
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129 | while (optind < argc) {
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130 | rpm_fd = bb_xopen(argv[optind], O_RDONLY);
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131 | mytags = rpm_gettags(rpm_fd, (int *) &tagcount);
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132 | offset = lseek(rpm_fd, 0, SEEK_CUR);
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133 | if (!mytags) { printf("Error reading rpm header\n"); exit(-1); }
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134 | map = mmap(0, offset > getpagesize() ? (offset + offset % getpagesize()) : getpagesize(), PROT_READ, MAP_PRIVATE, rpm_fd, 0); // Mimimum is one page
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135 | if (func & rpm_install) {
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136 | loop_through_files(RPMTAG_BASENAMES, fileaction_dobackup); /* Backup any config files */
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137 | extract_cpio_gz(rpm_fd); // Extact the archive
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138 | loop_through_files(RPMTAG_BASENAMES, fileaction_setowngrp); /* Set the correct file uid/gid's */
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139 | } else if (func & rpm_query && func & rpm_query_package) {
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140 | if (!((func & rpm_query_info) || (func & rpm_query_list))) { // If just a straight query, just give package name
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141 | printf("%s-%s-%s\n", rpm_getstring(RPMTAG_NAME, 0), rpm_getstring(RPMTAG_VERSION, 0), rpm_getstring(RPMTAG_RELEASE, 0));
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142 | }
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143 | if (func & rpm_query_info) {
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144 | /* Do the nice printout */
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145 | time_t bdate_time;
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146 | struct tm *bdate;
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147 | char bdatestring[50];
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148 | 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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149 | 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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150 | bdate_time = rpm_getint(RPMTAG_BUILDTIME, 0);
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151 | bdate = localtime((time_t *) &bdate_time);
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152 | strftime(bdatestring, 50, "%a %d %b %Y %T %Z", bdate);
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153 | printf("Release : %-30sBuild Date: %s\n", rpm_getstring(RPMTAG_RELEASE, 0), bdatestring);
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154 | printf("Install date: %-30sBuild Host: %s\n", "(not installed)", rpm_getstring(RPMTAG_BUILDHOST, 0));
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155 | printf("Group : %-30sSource RPM: %s\n", rpm_getstring(RPMTAG_GROUP, 0), rpm_getstring(RPMTAG_SOURCERPM, 0));
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156 | printf("Size : %-33dLicense: %s\n", rpm_getint(RPMTAG_SIZE, 0), rpm_getstring(RPMTAG_LICENSE, 0));
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157 | printf("URL : %s\n", rpm_getstring(RPMTAG_URL, 0));
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158 | printf("Summary : %s\n", rpm_getstring(RPMTAG_SUMMARY, 0));
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159 | printf("Description :\n%s\n", rpm_getstring(RPMTAG_DESCRIPTION, 0));
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160 | }
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161 | if (func & rpm_query_list) {
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162 | int count, it, flags;
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163 | count = rpm_getcount(RPMTAG_BASENAMES);
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164 | for (it = 0; it < count; it++) {
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165 | flags = rpm_getint(RPMTAG_FILEFLAGS, it);
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166 | switch ((func & rpm_query_list_doc) + (func & rpm_query_list_config))
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167 | {
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168 | case rpm_query_list_doc: if (!(flags & RPMFILE_DOC)) continue; break;
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169 | case rpm_query_list_config: if (!(flags & RPMFILE_CONFIG)) continue; break;
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170 | case rpm_query_list_doc + rpm_query_list_config: if (!((flags & RPMFILE_CONFIG) || (flags & RPMFILE_DOC))) continue; break;
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171 | }
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172 | printf("%s%s\n", rpm_getstring(RPMTAG_DIRNAMES, rpm_getint(RPMTAG_DIRINDEXES, it)), rpm_getstring(RPMTAG_BASENAMES, it));
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173 | }
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174 | }
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175 | }
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176 | optind++;
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177 | free (mytags);
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178 | }
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179 | return 0;
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180 | }
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181 |
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182 | void extract_cpio_gz(int fd) {
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183 | archive_handle_t *archive_handle;
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184 | unsigned char magic[2];
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185 |
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186 | /* Initialise */
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187 | archive_handle = init_handle();
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188 | archive_handle->seek = seek_by_char;
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189 | //archive_handle->action_header = header_list;
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190 | archive_handle->action_data = data_extract_all;
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191 | archive_handle->flags |= ARCHIVE_PRESERVE_DATE;
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192 | archive_handle->flags |= ARCHIVE_CREATE_LEADING_DIRS;
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193 | archive_handle->src_fd = fd;
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194 | archive_handle->offset = 0;
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195 |
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196 | bb_xread_all(archive_handle->src_fd, &magic, 2);
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197 | if ((magic[0] != 0x1f) || (magic[1] != 0x8b)) {
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198 | bb_error_msg_and_die("Invalid gzip magic");
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199 | }
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200 | check_header_gzip(archive_handle->src_fd);
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201 | bb_xchdir("/"); // Install RPM's to root
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202 |
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203 | archive_handle->src_fd = open_transformer(archive_handle->src_fd, inflate_gunzip);
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204 | archive_handle->offset = 0;
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205 | while (get_header_cpio(archive_handle) == EXIT_SUCCESS);
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206 | }
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207 |
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208 |
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209 | rpm_index **rpm_gettags(int fd, int *num_tags)
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210 | {
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211 | rpm_index **tags = xzalloc(200 * sizeof(struct rpmtag *)); /* We should never need mode than 200, and realloc later */
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212 | int pass, tagindex = 0;
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213 | lseek(fd, 96, SEEK_CUR); /* Seek past the unused lead */
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214 |
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215 | for (pass = 0; pass < 2; pass++) { /* 1st pass is the signature headers, 2nd is the main stuff */
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216 | struct {
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217 | char magic[3]; /* 3 byte magic: 0x8e 0xad 0xe8 */
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218 | uint8_t version; /* 1 byte version number */
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219 | uint32_t reserved; /* 4 bytes reserved */
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220 | uint32_t entries; /* Number of entries in header (4 bytes) */
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221 | uint32_t size; /* Size of store (4 bytes) */
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222 | } header;
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223 | rpm_index *tmpindex;
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224 | int storepos;
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225 |
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226 | read(fd, &header, sizeof(header));
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227 | if (strncmp((char *) &header.magic, RPM_HEADER_MAGIC, 3) != 0) return NULL; /* Invalid magic */
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228 | if (header.version != 1) return NULL; /* This program only supports v1 headers */
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229 | header.size = ntohl(header.size);
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230 | header.entries = ntohl(header.entries);
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231 | storepos = lseek(fd,0,SEEK_CUR) + header.entries * 16;
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232 |
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233 | while (header.entries--) {
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234 | tmpindex = tags[tagindex++] = xmalloc(sizeof(rpm_index));
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235 | read(fd, tmpindex, sizeof(rpm_index));
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236 | tmpindex->tag = ntohl(tmpindex->tag); tmpindex->type = ntohl(tmpindex->type); tmpindex->count = ntohl(tmpindex->count);
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237 | tmpindex->offset = storepos + ntohl(tmpindex->offset);
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238 | if (pass==0) tmpindex->tag -= 743;
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239 | }
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240 | lseek(fd, header.size, SEEK_CUR); /* Seek past store */
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241 | 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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242 | }
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243 | tags = realloc(tags, tagindex * sizeof(struct rpmtag *)); /* realloc tags to save space */
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244 | *num_tags = tagindex;
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245 | return tags; /* All done, leave the file at the start of the gzipped cpio archive */
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246 | }
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247 |
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248 | int bsearch_rpmtag(const void *key, const void *item)
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249 | {
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250 | int *tag = (int *)key;
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251 | rpm_index **tmp = (rpm_index **) item;
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252 | return (*tag - tmp[0]->tag);
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253 | }
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254 |
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255 | int rpm_getcount(int tag)
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256 | {
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257 | rpm_index **found;
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258 | found = bsearch(&tag, mytags, tagcount, sizeof(struct rpmtag *), bsearch_rpmtag);
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259 | if (!found) return 0;
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260 | else return found[0]->count;
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261 | }
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262 |
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263 | char *rpm_getstring(int tag, int itemindex)
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264 | {
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265 | rpm_index **found;
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266 | found = bsearch(&tag, mytags, tagcount, sizeof(struct rpmtag *), bsearch_rpmtag);
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267 | if (!found || itemindex >= found[0]->count) return NULL;
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268 | if (found[0]->type == RPM_STRING_TYPE || found[0]->type == RPM_I18NSTRING_TYPE || found[0]->type == RPM_STRING_ARRAY_TYPE) {
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269 | int n;
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270 | char *tmpstr = (char *) (map + found[0]->offset);
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271 | for (n=0; n < itemindex; n++) tmpstr = tmpstr + strlen(tmpstr) + 1;
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272 | return tmpstr;
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273 | } else return NULL;
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274 | }
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275 |
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276 | int rpm_getint(int tag, int itemindex)
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277 | {
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278 | rpm_index **found;
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279 | int n, *tmpint;
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280 | /* gcc throws warnings here when sizeof(void*)!=sizeof(int) ...
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281 | * it's ok to ignore it because tag won't be used as a pointer */
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282 | found = bsearch(&tag, mytags, tagcount, sizeof(struct rpmtag *), bsearch_rpmtag);
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283 | if (!found || itemindex >= found[0]->count) return -1;
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284 | tmpint = (int *) (map + found[0]->offset);
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285 | if (found[0]->type == RPM_INT32_TYPE) {
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286 | for (n=0; n<itemindex; n++) tmpint = (int *) ((void *) tmpint + 4);
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287 | return ntohl(*tmpint);
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288 | } else if (found[0]->type == RPM_INT16_TYPE) {
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289 | for (n=0; n<itemindex; n++) tmpint = (int *) ((void *) tmpint + 2);
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290 | return ntohs(*tmpint);
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291 | } else if (found[0]->type == RPM_INT8_TYPE) {
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292 | for (n=0; n<itemindex; n++) tmpint = (int *) ((void *) tmpint + 1);
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293 | return ntohs(*tmpint);
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294 | } else return -1;
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295 | }
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296 |
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297 | void fileaction_dobackup(char *filename, int fileref)
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298 | {
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299 | struct stat oldfile;
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300 | int stat_res;
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301 | char *newname;
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302 | if (rpm_getint(RPMTAG_FILEFLAGS, fileref) & RPMFILE_CONFIG) { /* Only need to backup config files */
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303 | stat_res = lstat (filename, &oldfile);
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304 | 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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305 | newname = bb_xstrdup(filename);
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306 | newname = strcat(newname, ".rpmorig");
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307 | copy_file(filename, newname, FILEUTILS_RECUR | FILEUTILS_PRESERVE_STATUS);
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308 | remove_file(filename, FILEUTILS_RECUR | FILEUTILS_FORCE);
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309 | free(newname);
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310 | }
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311 | }
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312 | }
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313 |
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314 | void fileaction_setowngrp(char *filename, int fileref)
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315 | {
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316 | int uid, gid;
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317 | uid = bb_xgetpwnam(rpm_getstring(RPMTAG_FILEUSERNAME, fileref));
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318 | gid = bb_xgetgrnam(rpm_getstring(RPMTAG_FILEGROUPNAME, fileref));
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319 | chown (filename, uid, gid);
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320 | }
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321 |
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322 | void fileaction_list(char *filename, int ATTRIBUTE_UNUSED fileref)
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323 | {
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324 | printf("%s\n", filename);
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325 | }
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326 |
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327 | void loop_through_files(int filetag, void (*fileaction)(char *filename, int fileref))
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328 | {
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329 | int count = 0;
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330 | while (rpm_getstring(filetag, count)) {
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331 | char * filename = bb_xasprintf("%s%s",
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332 | rpm_getstring(RPMTAG_DIRNAMES, rpm_getint(RPMTAG_DIRINDEXES,
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333 | count)), rpm_getstring(RPMTAG_BASENAMES, count));
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334 | fileaction(filename, count++);
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335 | free(filename);
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336 | }
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337 | }
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