| 1 | // |
| 2 | // pkgutils |
| 3 | // |
| 4 | // Copyright (c) 2000-2005 Per Liden |
| 5 | // Copyright (c) 2006-2013 by CRUX team (http://crux.nu) |
| 6 | // |
| 7 | // This program is free software; you can redistribute it and/or modify |
| 8 | // it under the terms of the GNU General Public License as published by |
| 9 | // the Free Software Foundation; either version 2 of the License, or |
| 10 | // (at your option) any later version. |
| 11 | // |
| 12 | // This program is distributed in the hope that it will be useful, |
| 13 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 15 | // GNU General Public License for more details. |
| 16 | // |
| 17 | // You should have received a copy of the GNU General Public License |
| 18 | // along with this program; if not, write to the Free Software |
| 19 | // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
| 20 | // USA. |
| 21 | // |
| 22 | |
| 23 | #include "pkgadd.h" |
| 24 | #include <fstream> |
| 25 | #include <iterator> |
| 26 | #include <cstdio> |
| 27 | #include <regex.h> |
| 28 | #include <unistd.h> |
| 29 | |
| 30 | void pkgadd::run(int argc, char** argv) |
| 31 | { |
| 32 | // |
| 33 | // Check command line options |
| 34 | // |
| 35 | string o_root; |
| 36 | string o_package; |
| 37 | bool o_upgrade = false; |
| 38 | bool o_force = false; |
| 39 | |
| 40 | for (int i = 1; i < argc; i++) { |
| 41 | string option(argv[i]); |
| 42 | if (option == "-r" || option == "--root") { |
| 43 | assert_argument(argv, argc, i); |
| 44 | o_root = argv[i + 1]; |
| 45 | i++; |
| 46 | } else if (option == "-u" || option == "--upgrade") { |
| 47 | o_upgrade = true; |
| 48 | } else if (option == "-f" || option == "--force") { |
| 49 | o_force = true; |
| 50 | } else if (option[0] == '-' || !o_package.empty()) { |
| 51 | throw runtime_error("invalid option " + option); |
| 52 | } else { |
| 53 | o_package = option; |
| 54 | } |
| 55 | } |
| 56 | |
| 57 | if (o_package.empty()) |
| 58 | throw runtime_error("option missing"); |
| 59 | |
| 60 | // |
| 61 | // Check UID |
| 62 | // |
| 63 | if (getuid()) |
| 64 | throw runtime_error("only root can install/upgrade packages"); |
| 65 | |
| 66 | // |
| 67 | // Install/upgrade package |
| 68 | // |
| 69 | { |
| 70 | db_lock lock(o_root, true); |
| 71 | db_open(o_root); |
| 72 | |
| 73 | pair<string, pkginfo_t> package = pkg_open(o_package); |
| 74 | vector<rule_t> config_rules = read_config(); |
| 75 | |
| 76 | bool installed = db_find_pkg(package.first); |
| 77 | if (installed && !o_upgrade) |
| 78 | throw runtime_error("package " + package.first + " already installed (use -u to upgrade)"); |
| 79 | else if (!installed && o_upgrade) |
| 80 | throw runtime_error("package " + package.first + " not previously installed (skip -u to install)"); |
| 81 | |
| 82 | set<string> non_install_files = apply_install_rules(package.first, package.second, config_rules); |
| 83 | set<string> conflicting_files = db_find_conflicts(package.first, package.second); |
| 84 | |
| 85 | if (!conflicting_files.empty()) { |
| 86 | if (o_force) { |
| 87 | set<string> keep_list; |
| 88 | if (o_upgrade) // Don't remove files matching the rules in configuration |
| 89 | keep_list = make_keep_list(conflicting_files, config_rules); |
| 90 | db_rm_files(conflicting_files, keep_list); // Remove unwanted conflicts |
| 91 | } else { |
| 92 | copy(conflicting_files.begin(), conflicting_files.end(), ostream_iterator<string>(cerr, "\n")); |
| 93 | throw runtime_error("listed file(s) already installed (use -f to ignore and overwrite)"); |
| 94 | } |
| 95 | } |
| 96 | |
| 97 | set<string> keep_list; |
| 98 | |
| 99 | if (o_upgrade) { |
| 100 | keep_list = make_keep_list(package.second.files, config_rules); |
| 101 | db_rm_pkg(package.first, keep_list); |
| 102 | } |
| 103 | |
| 104 | db_add_pkg(package.first, package.second); |
| 105 | db_commit(); |
| 106 | pkg_install(o_package, keep_list, non_install_files); |
| 107 | ldconfig(); |
| 108 | } |
| 109 | } |
| 110 | |
| 111 | void pkgadd::print_help() const |
| 112 | { |
| 113 | cout << "usage: " << utilname << " [options] <file>" << endl |
| 114 | << "options:" << endl |
| 115 | << " -u, --upgrade upgrade package with the same name" << endl |
| 116 | << " -f, --force force install, overwrite conflicting files" << endl |
| 117 | << " -r, --root <path> specify alternative installation root" << endl |
| 118 | << " -v, --version print version and exit" << endl |
| 119 | << " -h, --help print help and exit" << endl; |
| 120 | } |
| 121 | |
| 122 | vector<rule_t> pkgadd::read_config() const |
| 123 | { |
| 124 | vector<rule_t> rules; |
| 125 | unsigned int linecount = 0; |
| 126 | const string filename = root + PKGADD_CONF; |
| 127 | ifstream in(filename.c_str()); |
| 128 | |
| 129 | if (in) { |
| 130 | while (!in.eof()) { |
| 131 | string line; |
| 132 | getline(in, line); |
| 133 | linecount++; |
| 134 | if (!line.empty() && line[0] != '#') { |
| 135 | if (line.length() >= PKGADD_CONF_MAXLINE) |
| 136 | throw runtime_error(filename + ":" + itos(linecount) + ": line too long, aborting"); |
| 137 | |
| 138 | char event[PKGADD_CONF_MAXLINE]; |
| 139 | char pattern[PKGADD_CONF_MAXLINE]; |
| 140 | char action[PKGADD_CONF_MAXLINE]; |
| 141 | char dummy[PKGADD_CONF_MAXLINE]; |
| 142 | if (sscanf(line.c_str(), "%s %s %s %s", event, pattern, action, dummy) != 3) |
| 143 | throw runtime_error(filename + ":" + itos(linecount) + ": wrong number of arguments, aborting"); |
| 144 | |
| 145 | if (!strcmp(event, "UPGRADE") || !strcmp(event, "INSTALL")) { |
| 146 | rule_t rule; |
| 147 | rule.event = strcmp(event, "UPGRADE") ? INSTALL : UPGRADE; |
| 148 | rule.pattern = pattern; |
| 149 | if (!strcmp(action, "YES")) { |
| 150 | rule.action = true; |
| 151 | } else if (!strcmp(action, "NO")) { |
| 152 | rule.action = false; |
| 153 | } else |
| 154 | throw runtime_error(filename + ":" + itos(linecount) + ": '" + |
| 155 | string(action) + "' unknown action, should be YES or NO, aborting"); |
| 156 | |
| 157 | rules.push_back(rule); |
| 158 | } else |
| 159 | throw runtime_error(filename + ":" + itos(linecount) + ": '" + |
| 160 | string(event) + "' unknown event, aborting"); |
| 161 | } |
| 162 | } |
| 163 | in.close(); |
| 164 | } |
| 165 | |
| 166 | #ifndef NDEBUG |
| 167 | cerr << "Configuration:" << endl; |
| 168 | for (vector<rule_t>::const_iterator j = rules.begin(); j != rules.end(); j++) { |
| 169 | cerr << "\t" << (*j).pattern << "\t" << (*j).action << endl; |
| 170 | } |
| 171 | cerr << endl; |
| 172 | #endif |
| 173 | |
| 174 | return rules; |
| 175 | } |
| 176 | |
| 177 | set<string> pkgadd::make_keep_list(const set<string>& files, const vector<rule_t>& rules) const |
| 178 | { |
| 179 | set<string> keep_list; |
| 180 | vector<rule_t> found; |
| 181 | |
| 182 | find_rules(rules, UPGRADE, found); |
| 183 | |
| 184 | for (set<string>::const_iterator i = files.begin(); i != files.end(); i++) { |
| 185 | for (vector<rule_t>::reverse_iterator j = found.rbegin(); j != found.rend(); j++) { |
| 186 | if (rule_applies_to_file(*j, *i)) { |
| 187 | if (!(*j).action) |
| 188 | keep_list.insert(keep_list.end(), *i); |
| 189 | |
| 190 | break; |
| 191 | } |
| 192 | } |
| 193 | } |
| 194 | |
| 195 | #ifndef NDEBUG |
| 196 | cerr << "Keep list:" << endl; |
| 197 | for (set<string>::const_iterator j = keep_list.begin(); j != keep_list.end(); j++) { |
| 198 | cerr << " " << (*j) << endl; |
| 199 | } |
| 200 | cerr << endl; |
| 201 | #endif |
| 202 | |
| 203 | return keep_list; |
| 204 | } |
| 205 | |
| 206 | set<string> pkgadd::apply_install_rules(const string& name, pkginfo_t& info, const vector<rule_t>& rules) |
| 207 | { |
| 208 | // TODO: better algo(?) |
| 209 | set<string> install_set; |
| 210 | set<string> non_install_set; |
| 211 | vector<rule_t> found; |
| 212 | |
| 213 | find_rules(rules, INSTALL, found); |
| 214 | |
| 215 | for (set<string>::const_iterator i = info.files.begin(); i != info.files.end(); i++) { |
| 216 | bool install_file = true; |
| 217 | |
| 218 | for (vector<rule_t>::reverse_iterator j = found.rbegin(); j != found.rend(); j++) { |
| 219 | if (rule_applies_to_file(*j, *i)) { |
| 220 | install_file = (*j).action; |
| 221 | break; |
| 222 | } |
| 223 | } |
| 224 | |
| 225 | if (install_file) |
| 226 | install_set.insert(install_set.end(), *i); |
| 227 | else |
| 228 | non_install_set.insert(*i); |
| 229 | } |
| 230 | |
| 231 | info.files.clear(); |
| 232 | info.files = install_set; |
| 233 | |
| 234 | #ifndef NDEBUG |
| 235 | cerr << "Install set:" << endl; |
| 236 | for (set<string>::iterator j = info.files.begin(); j != info.files.end(); j++) { |
| 237 | cerr << " " << (*j) << endl; |
| 238 | } |
| 239 | cerr << endl; |
| 240 | |
| 241 | cerr << "Non-Install set:" << endl; |
| 242 | for (set<string>::iterator j = non_install_set.begin(); j != non_install_set.end(); j++) { |
| 243 | cerr << " " << (*j) << endl; |
| 244 | } |
| 245 | cerr << endl; |
| 246 | #endif |
| 247 | |
| 248 | return non_install_set; |
| 249 | } |
| 250 | |
| 251 | void pkgadd::find_rules(const vector<rule_t>& rules, rule_event_t event, vector<rule_t>& found) const |
| 252 | { |
| 253 | for (vector<rule_t>::const_iterator i = rules.begin(); i != rules.end(); i++) |
| 254 | if (i->event == event) |
| 255 | found.push_back(*i); |
| 256 | } |
| 257 | |
| 258 | bool pkgadd::rule_applies_to_file(const rule_t& rule, const string& file) const |
| 259 | { |
| 260 | regex_t preg; |
| 261 | bool ret; |
| 262 | |
| 263 | if (regcomp(&preg, rule.pattern.c_str(), REG_EXTENDED | REG_NOSUB)) |
| 264 | throw runtime_error("error compiling regular expression '" + rule.pattern + "', aborting"); |
| 265 | |
| 266 | ret = !regexec(&preg, file.c_str(), 0, 0, 0); |
| 267 | regfree(&preg); |
| 268 | |
| 269 | return ret; |
| 270 | } |