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 source tree.
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8 | */
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9 |
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10 | //config:config RPM
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11 | //config: bool "rpm"
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12 | //config: default y
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13 | //config: help
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14 | //config: Mini RPM applet - queries and extracts RPM packages.
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15 |
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16 | //applet:IF_RPM(APPLET(rpm, BB_DIR_BIN, BB_SUID_DROP))
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17 | //kbuild:lib-$(CONFIG_RPM) += rpm.o
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18 |
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19 | //usage:#define rpm_trivial_usage
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20 | //usage: "-i PACKAGE.rpm; rpm -qp[ildc] PACKAGE.rpm"
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21 | //usage:#define rpm_full_usage "\n\n"
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22 | //usage: "Manipulate RPM packages\n"
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23 | //usage: "\nCommands:"
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24 | //usage: "\n -i Install package"
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25 | //usage: "\n -qp Query package"
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26 | //usage: "\n -qpi Show information"
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27 | //usage: "\n -qpl List contents"
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28 | //usage: "\n -qpd List documents"
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29 | //usage: "\n -qpc List config files"
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30 |
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31 | #include "libbb.h"
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32 | #include "common_bufsiz.h"
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33 | #include "bb_archive.h"
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34 | #include "rpm.h"
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35 |
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36 | #define RPM_CHAR_TYPE 1
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37 | #define RPM_INT8_TYPE 2
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38 | #define RPM_INT16_TYPE 3
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39 | #define RPM_INT32_TYPE 4
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40 | /* #define RPM_INT64_TYPE 5 ---- These aren't supported (yet) */
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41 | #define RPM_STRING_TYPE 6
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42 | #define RPM_BIN_TYPE 7
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43 | #define RPM_STRING_ARRAY_TYPE 8
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44 | #define RPM_I18NSTRING_TYPE 9
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45 |
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46 | #define TAG_NAME 1000
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47 | #define TAG_VERSION 1001
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48 | #define TAG_RELEASE 1002
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49 | #define TAG_SUMMARY 1004
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50 | #define TAG_DESCRIPTION 1005
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51 | #define TAG_BUILDTIME 1006
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52 | #define TAG_BUILDHOST 1007
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53 | #define TAG_SIZE 1009
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54 | #define TAG_VENDOR 1011
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55 | #define TAG_LICENSE 1014
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56 | #define TAG_PACKAGER 1015
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57 | #define TAG_GROUP 1016
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58 | #define TAG_URL 1020
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59 | #define TAG_PREIN 1023
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60 | #define TAG_POSTIN 1024
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61 | #define TAG_FILEFLAGS 1037
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62 | #define TAG_FILEUSERNAME 1039
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63 | #define TAG_FILEGROUPNAME 1040
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64 | #define TAG_SOURCERPM 1044
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65 | #define TAG_PREINPROG 1085
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66 | #define TAG_POSTINPROG 1086
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67 | #define TAG_PREFIXS 1098
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68 | #define TAG_DIRINDEXES 1116
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69 | #define TAG_BASENAMES 1117
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70 | #define TAG_DIRNAMES 1118
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71 |
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72 | #define RPMFILE_CONFIG (1 << 0)
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73 | #define RPMFILE_DOC (1 << 1)
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74 |
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75 | enum rpm_functions_e {
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76 | rpm_query = 1,
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77 | rpm_install = 2,
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78 | rpm_query_info = 4,
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79 | rpm_query_package = 8,
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80 | rpm_query_list = 16,
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81 | rpm_query_list_doc = 32,
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82 | rpm_query_list_config = 64
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83 | };
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84 |
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85 | typedef struct {
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86 | uint32_t tag; /* 4 byte tag */
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87 | uint32_t type; /* 4 byte type */
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88 | uint32_t offset; /* 4 byte offset */
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89 | uint32_t count; /* 4 byte count */
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90 | } rpm_index;
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91 |
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92 | struct globals {
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93 | void *map;
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94 | rpm_index **mytags;
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95 | int tagcount;
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96 | } FIX_ALIASING;
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97 | #define G (*(struct globals*)bb_common_bufsiz1)
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98 | #define INIT_G() do { setup_common_bufsiz(); } while (0)
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99 |
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100 | static void extract_cpio(int fd, const char *source_rpm)
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101 | {
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102 | archive_handle_t *archive_handle;
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103 |
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104 | if (source_rpm != NULL) {
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105 | /* Binary rpm (it was built from some SRPM), install to root */
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106 | xchdir("/");
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107 | } /* else: SRPM, install to current dir */
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108 |
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109 | /* Initialize */
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110 | archive_handle = init_handle();
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111 | archive_handle->seek = seek_by_read;
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112 | archive_handle->action_data = data_extract_all;
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113 | #if 0 /* For testing (rpm -i only lists the files in internal cpio): */
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114 | archive_handle->action_header = header_list;
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115 | archive_handle->action_data = data_skip;
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116 | #endif
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117 | archive_handle->ah_flags = ARCHIVE_RESTORE_DATE | ARCHIVE_CREATE_LEADING_DIRS
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118 | /* compat: overwrite existing files.
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119 | * try "rpm -i foo.src.rpm" few times in a row -
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120 | * standard rpm will not complain.
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121 | */
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122 | | ARCHIVE_REPLACE_VIA_RENAME;
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123 | archive_handle->src_fd = fd;
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124 | /*archive_handle->offset = 0; - init_handle() did it */
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125 |
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126 | setup_unzip_on_fd(archive_handle->src_fd, /*fail_if_not_compressed:*/ 1);
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127 | while (get_header_cpio(archive_handle) == EXIT_SUCCESS)
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128 | continue;
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129 | }
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130 |
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131 | static rpm_index **rpm_gettags(int fd, int *num_tags)
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132 | {
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133 | /* We should never need more than 200 (shrink via realloc later) */
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134 | rpm_index **tags = xzalloc(200 * sizeof(tags[0]));
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135 | int pass, tagindex = 0;
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136 |
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137 | xlseek(fd, 96, SEEK_CUR); /* Seek past the unused lead */
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138 |
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139 | /* 1st pass is the signature headers, 2nd is the main stuff */
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140 | for (pass = 0; pass < 2; pass++) {
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141 | struct rpm_header header;
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142 | rpm_index *tmpindex;
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143 | int storepos;
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144 |
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145 | xread(fd, &header, sizeof(header));
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146 | if (header.magic_and_ver != htonl(RPM_HEADER_MAGICnVER))
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147 | return NULL; /* Invalid magic, or not version 1 */
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148 | header.size = ntohl(header.size);
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149 | header.entries = ntohl(header.entries);
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150 | storepos = xlseek(fd, 0, SEEK_CUR) + header.entries * 16;
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151 |
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152 | while (header.entries--) {
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153 | tmpindex = tags[tagindex++] = xmalloc(sizeof(*tmpindex));
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154 | xread(fd, tmpindex, sizeof(*tmpindex));
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155 | tmpindex->tag = ntohl(tmpindex->tag);
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156 | tmpindex->type = ntohl(tmpindex->type);
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157 | tmpindex->count = ntohl(tmpindex->count);
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158 | tmpindex->offset = storepos + ntohl(tmpindex->offset);
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159 | if (pass == 0)
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160 | tmpindex->tag -= 743;
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161 | }
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162 | storepos = xlseek(fd, header.size, SEEK_CUR); /* Seek past store */
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163 | /* Skip padding to 8 byte boundary after reading signature headers */
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164 | if (pass == 0)
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165 | xlseek(fd, (-storepos) & 0x7, SEEK_CUR);
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166 | }
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167 | /* realloc tags to save space */
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168 | tags = xrealloc(tags, tagindex * sizeof(tags[0]));
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169 | *num_tags = tagindex;
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170 | /* All done, leave the file at the start of the gzipped cpio archive */
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171 | return tags;
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172 | }
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173 |
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174 | static int bsearch_rpmtag(const void *key, const void *item)
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175 | {
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176 | int *tag = (int *)key;
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177 | rpm_index **tmp = (rpm_index **) item;
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178 | return (*tag - tmp[0]->tag);
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179 | }
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180 |
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181 | static int rpm_getcount(int tag)
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182 | {
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183 | rpm_index **found;
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184 | found = bsearch(&tag, G.mytags, G.tagcount, sizeof(struct rpmtag *), bsearch_rpmtag);
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185 | if (!found)
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186 | return 0;
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187 | return found[0]->count;
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188 | }
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189 |
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190 | static char *rpm_getstr(int tag, int itemindex)
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191 | {
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192 | rpm_index **found;
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193 | found = bsearch(&tag, G.mytags, G.tagcount, sizeof(struct rpmtag *), bsearch_rpmtag);
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194 | if (!found || itemindex >= found[0]->count)
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195 | return NULL;
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196 | if (found[0]->type == RPM_STRING_TYPE
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197 | || found[0]->type == RPM_I18NSTRING_TYPE
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198 | || found[0]->type == RPM_STRING_ARRAY_TYPE
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199 | ) {
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200 | int n;
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201 | char *tmpstr = (char *) G.map + found[0]->offset;
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202 | for (n = 0; n < itemindex; n++)
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203 | tmpstr = tmpstr + strlen(tmpstr) + 1;
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204 | return tmpstr;
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205 | }
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206 | return NULL;
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207 | }
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208 |
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209 | static int rpm_getint(int tag, int itemindex)
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210 | {
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211 | rpm_index **found;
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212 | char *tmpint;
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213 |
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214 | /* gcc throws warnings here when sizeof(void*)!=sizeof(int) ...
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215 | * it's ok to ignore it because tag won't be used as a pointer */
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216 | found = bsearch(&tag, G.mytags, G.tagcount, sizeof(struct rpmtag *), bsearch_rpmtag);
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217 | if (!found || itemindex >= found[0]->count)
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218 | return -1;
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219 |
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220 | tmpint = (char *) G.map + found[0]->offset;
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221 | if (found[0]->type == RPM_INT32_TYPE) {
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222 | tmpint += itemindex*4;
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223 | return ntohl(*(int32_t*)tmpint);
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224 | }
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225 | if (found[0]->type == RPM_INT16_TYPE) {
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226 | tmpint += itemindex*2;
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227 | return ntohs(*(int16_t*)tmpint);
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228 | }
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229 | if (found[0]->type == RPM_INT8_TYPE) {
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230 | tmpint += itemindex;
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231 | return *(int8_t*)tmpint;
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232 | }
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233 | return -1;
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234 | }
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235 |
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236 | static void fileaction_dobackup(char *filename, int fileref)
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237 | {
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238 | struct stat oldfile;
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239 | int stat_res;
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240 | char *newname;
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241 | if (rpm_getint(TAG_FILEFLAGS, fileref) & RPMFILE_CONFIG) {
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242 | /* Only need to backup config files */
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243 | stat_res = lstat(filename, &oldfile);
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244 | if (stat_res == 0 && S_ISREG(oldfile.st_mode)) {
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245 | /* File already exists - really should check MD5's etc to see if different */
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246 | newname = xasprintf("%s.rpmorig", filename);
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247 | copy_file(filename, newname, FILEUTILS_RECUR | FILEUTILS_PRESERVE_STATUS);
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248 | remove_file(filename, FILEUTILS_RECUR | FILEUTILS_FORCE);
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249 | free(newname);
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250 | }
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251 | }
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252 | }
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253 |
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254 | static void fileaction_setowngrp(char *filename, int fileref)
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255 | {
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256 | /* real rpm warns: "user foo does not exist - using <you>" */
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257 | struct passwd *pw = getpwnam(rpm_getstr(TAG_FILEUSERNAME, fileref));
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258 | int uid = pw ? pw->pw_uid : getuid(); /* or euid? */
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259 | struct group *gr = getgrnam(rpm_getstr(TAG_FILEGROUPNAME, fileref));
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260 | int gid = gr ? gr->gr_gid : getgid();
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261 | chown(filename, uid, gid);
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262 | }
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263 |
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264 | static void loop_through_files(int filetag, void (*fileaction)(char *filename, int fileref))
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265 | {
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266 | int count = 0;
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267 | while (rpm_getstr(filetag, count)) {
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268 | char* filename = xasprintf("%s%s",
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269 | rpm_getstr(TAG_DIRNAMES, rpm_getint(TAG_DIRINDEXES, count)),
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270 | rpm_getstr(TAG_BASENAMES, count));
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271 | fileaction(filename, count++);
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272 | free(filename);
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273 | }
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274 | }
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275 |
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276 | int rpm_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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277 | int rpm_main(int argc, char **argv)
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278 | {
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279 | int opt, func = 0;
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280 | const unsigned pagesize = getpagesize();
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281 |
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282 | while ((opt = getopt(argc, argv, "iqpldc")) != -1) {
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283 | switch (opt) {
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284 | case 'i': /* First arg: Install mode, with q: Information */
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285 | if (!func) func = rpm_install;
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286 | else func |= rpm_query_info;
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287 | break;
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288 | case 'q': /* First arg: Query mode */
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289 | if (func) bb_show_usage();
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290 | func = rpm_query;
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291 | break;
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292 | case 'p': /* Query a package */
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293 | func |= rpm_query_package;
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294 | break;
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295 | case 'l': /* List files in a package */
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296 | func |= rpm_query_list;
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297 | break;
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298 | case 'd': /* List doc files in a package (implies list) */
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299 | func |= rpm_query_list;
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300 | func |= rpm_query_list_doc;
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301 | break;
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302 | case 'c': /* List config files in a package (implies list) */
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303 | func |= rpm_query_list;
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304 | func |= rpm_query_list_config;
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305 | break;
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306 | default:
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307 | bb_show_usage();
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308 | }
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309 | }
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310 | argv += optind;
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311 | //argc -= optind;
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312 | if (!argv[0]) {
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313 | bb_show_usage();
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314 | }
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315 |
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316 | while (*argv) {
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317 | int rpm_fd;
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318 | unsigned mapsize;
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319 | const char *source_rpm;
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320 |
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321 | rpm_fd = xopen(*argv++, O_RDONLY);
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322 | G.mytags = rpm_gettags(rpm_fd, &G.tagcount);
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323 | if (!G.mytags)
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324 | bb_error_msg_and_die("error reading rpm header");
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325 | mapsize = xlseek(rpm_fd, 0, SEEK_CUR);
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326 | mapsize = (mapsize + pagesize) & -(int)pagesize;
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327 | /* Some NOMMU systems prefer MAP_PRIVATE over MAP_SHARED */
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328 | G.map = mmap(0, mapsize, PROT_READ, MAP_PRIVATE, rpm_fd, 0);
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329 | //FIXME: error check?
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330 |
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331 | source_rpm = rpm_getstr(TAG_SOURCERPM, 0);
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332 |
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333 | if (func & rpm_install) {
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334 | /* Backup any config files */
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335 | loop_through_files(TAG_BASENAMES, fileaction_dobackup);
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336 | /* Extact the archive */
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337 | extract_cpio(rpm_fd, source_rpm);
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338 | /* Set the correct file uid/gid's */
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339 | loop_through_files(TAG_BASENAMES, fileaction_setowngrp);
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340 | }
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341 | else if ((func & (rpm_query|rpm_query_package)) == (rpm_query|rpm_query_package)) {
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342 | if (!(func & (rpm_query_info|rpm_query_list))) {
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343 | /* If just a straight query, just give package name */
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344 | printf("%s-%s-%s\n", rpm_getstr(TAG_NAME, 0), rpm_getstr(TAG_VERSION, 0), rpm_getstr(TAG_RELEASE, 0));
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345 | }
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346 | if (func & rpm_query_info) {
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347 | /* Do the nice printout */
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348 | time_t bdate_time;
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349 | struct tm *bdate_ptm;
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350 | char bdatestring[50];
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351 | const char *p;
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352 |
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353 | printf("%-12s: %s\n", "Name" , rpm_getstr(TAG_NAME, 0));
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354 | /* TODO compat: add "Epoch" here */
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355 | printf("%-12s: %s\n", "Version" , rpm_getstr(TAG_VERSION, 0));
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356 | printf("%-12s: %s\n", "Release" , rpm_getstr(TAG_RELEASE, 0));
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357 | /* add "Architecture" */
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358 | printf("%-12s: %s\n", "Install Date", "(not installed)");
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359 | printf("%-12s: %s\n", "Group" , rpm_getstr(TAG_GROUP, 0));
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360 | printf("%-12s: %d\n", "Size" , rpm_getint(TAG_SIZE, 0));
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361 | printf("%-12s: %s\n", "License" , rpm_getstr(TAG_LICENSE, 0));
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362 | /* add "Signature" */
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363 | printf("%-12s: %s\n", "Source RPM" , source_rpm ? source_rpm : "(none)");
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364 | bdate_time = rpm_getint(TAG_BUILDTIME, 0);
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365 | bdate_ptm = localtime(&bdate_time);
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366 | strftime(bdatestring, 50, "%a %d %b %Y %T %Z", bdate_ptm);
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367 | printf("%-12s: %s\n", "Build Date" , bdatestring);
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368 | printf("%-12s: %s\n", "Build Host" , rpm_getstr(TAG_BUILDHOST, 0));
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369 | p = rpm_getstr(TAG_PREFIXS, 0);
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370 | printf("%-12s: %s\n", "Relocations" , p ? p : "(not relocatable)");
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371 | /* add "Packager" */
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372 | p = rpm_getstr(TAG_VENDOR, 0);
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373 | printf("%-12s: %s\n", "Vendor" , p ? p : "(none)");
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374 | printf("%-12s: %s\n", "URL" , rpm_getstr(TAG_URL, 0));
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375 | printf("%-12s: %s\n", "Summary" , rpm_getstr(TAG_SUMMARY, 0));
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376 | printf("Description :\n%s\n", rpm_getstr(TAG_DESCRIPTION, 0));
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377 | }
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378 | if (func & rpm_query_list) {
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379 | int count, it, flags;
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380 | count = rpm_getcount(TAG_BASENAMES);
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381 | for (it = 0; it < count; it++) {
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382 | flags = rpm_getint(TAG_FILEFLAGS, it);
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383 | switch (func & (rpm_query_list_doc|rpm_query_list_config)) {
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384 | case rpm_query_list_doc:
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385 | if (!(flags & RPMFILE_DOC)) continue;
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386 | break;
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387 | case rpm_query_list_config:
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388 | if (!(flags & RPMFILE_CONFIG)) continue;
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389 | break;
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390 | case rpm_query_list_doc|rpm_query_list_config:
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391 | if (!(flags & (RPMFILE_CONFIG|RPMFILE_DOC))) continue;
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392 | break;
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393 | }
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394 | printf("%s%s\n",
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395 | rpm_getstr(TAG_DIRNAMES, rpm_getint(TAG_DIRINDEXES, it)),
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396 | rpm_getstr(TAG_BASENAMES, it));
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397 | }
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398 | }
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399 | }
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400 | munmap(G.map, mapsize);
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401 | free(G.mytags);
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402 | close(rpm_fd);
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403 | }
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404 | return 0;
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405 | }
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