src/pkgadd.cc

   1 //
   2 //  pkgutils
   3 //
   4 //  Copyright (c) 2000-2005 Per Liden
   5 //  Copyright (c) 2006-2010 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_config;
  37         string o_package;
  38         bool o_upgrade = false;
  39         bool o_force = false;
  40
  41         for (int i = 1; i < argc; i++) {
  42                 string option(argv[i]);
  43                 if (option == "-r" || option == "--root") {
  44                         assert_argument(argv, argc, i);
  45                         o_root = argv[i + 1];
  46                         i++;
  47                 } else if (option == "-c" || option == "--config") {
  48                         assert_argument(argv, argc, i);
  49                         o_config = argv[i + 1];
  50                         i++;
  51                 } else if (option == "-u" || option == "--upgrade") {
  52                         o_upgrade = true;
  53                 } else if (option == "-f" || option == "--force") {
  54                         o_force = true;
  55                 } else if (option[0] == '-' || !o_package.empty()) {
  56                         throw runtime_error("invalid option " + option);
  57                 } else {
  58                         o_package = option;
  59                 }
  60         }
  61
  62         if (o_package.empty())
  63                 throw runtime_error("option missing");
  64
  65         //
  66         // Check UID
  67         //
  68         if (getuid())
  69                 throw runtime_error("only root can install/upgrade packages");
  70
  71         //
  72         // Install/upgrade package
  73         //
  74         {
  75                 db_lock lock(o_root, true);
  76                 db_open(o_root);
  77
  78                 pair<string, pkginfo_t> package = pkg_open(o_package);
  79                 vector<rule_t> config_rules = read_config(o_config);
  80
  81                 bool installed = db_find_pkg(package.first);
  82                 if (installed && !o_upgrade)
  83                         throw runtime_error("package " + package.first + " already installed (use -u to upgrade)");
  84                 else if (!installed && o_upgrade)
  85                         throw runtime_error("package " + package.first + " not previously installed (skip -u to install)");
  86
  87                 set<string> non_install_files = apply_install_rules(package.first, package.second, config_rules);
  88                 set<string> conflicting_files = db_find_conflicts(package.first, package.second);
  89
  90                 if (!conflicting_files.empty()) {
  91                         if (o_force) {
  92                                 set<string> keep_list;
  93                                 if (o_upgrade) // Don't remove files matching the rules in configuration
  94                                         keep_list = make_keep_list(conflicting_files, config_rules);
  95                                 db_rm_files(conflicting_files, keep_list); // Remove unwanted conflicts
  96                         } else {
  97                                 copy(conflicting_files.begin(), conflicting_files.end(), ostream_iterator<string>(cerr, "\n"));
  98                                 throw runtime_error("listed file(s) already installed (use -f to ignore and overwrite)");
  99                         }
 100                 }
 101
 102                 set<string> keep_list;
 103
 104                 if (o_upgrade) {
 105                         keep_list = make_keep_list(package.second.files, config_rules);
 106                         db_rm_pkg(package.first, keep_list);
 107                 }
 108
 109                 db_add_pkg(package.first, package.second);
 110                 db_commit();
 111                 pkg_install(o_package, keep_list, non_install_files);
 112                 ldconfig();
 113         }
 114 }
 115
 116 void pkgadd::print_help() const
 117 {
 118         cout << "usage: " << utilname << " [options] <file>" << endl
 119              << "options:" << endl
 120              << "  -u, --upgrade        upgrade package with the same name" << endl
 121              << "  -f, --force          force install, overwrite conflicting files" << endl
 122              << "  -r, --root <path>    specify alternative installation root" << endl
 123              << "  -c, --config <file>  use alternate configuration file" << endl
 124              << "  -v, --version        print version and exit" << endl
 125              << "  -h, --help           print help and exit" << endl;
 126 }
 127
 128 vector<rule_t> pkgadd::read_config(string file) const
 129 {
 130         vector<rule_t> rules;
 131         unsigned int linecount = 0;
 132         string filename = root + PKGADD_CONF;
 133
 134         if (!file.empty()) filename = file;
 135         ifstream in(filename.c_str());
 136
 137         if (in) {
 138                 while (!in.eof()) {
 139                         string line;
 140                         getline(in, line);
 141                         linecount++;
 142                         if (!line.empty() && line[0] != '#') {
 143                                 if (line.length() >= PKGADD_CONF_MAXLINE)
 144                                         throw runtime_error(filename + ":" + itos(linecount) + ": line too long, aborting");
 145
 146                                 char event[PKGADD_CONF_MAXLINE];
 147                                 char pattern[PKGADD_CONF_MAXLINE];
 148                                 char action[PKGADD_CONF_MAXLINE];
 149                                 char dummy[PKGADD_CONF_MAXLINE];
 150                                 if (sscanf(line.c_str(), "%s %s %s %s", event, pattern, action, dummy) != 3)
 151                                         throw runtime_error(filename + ":" + itos(linecount) + ": wrong number of arguments, aborting");
 152
 153                                 if (!strcmp(event, "UPGRADE") || !strcmp(event, "INSTALL")) {
 154                                         rule_t rule;
 155                                         rule.event = strcmp(event, "UPGRADE") ? INSTALL : UPGRADE;
 156                                         rule.pattern = pattern;
 157                                         if (!strcmp(action, "YES")) {
 158                                                 rule.action = true;
 159                                         } else if (!strcmp(action, "NO")) {
 160                                                 rule.action = false;
 161                                         } else
 162                                                 throw runtime_error(filename + ":" + itos(linecount) + ": '" +
 163                                                                     string(action) + "' unknown action, should be YES or NO, aborting");
 164
 165                                         rules.push_back(rule);
 166                                 } else
 167                                         throw runtime_error(filename + ":" + itos(linecount) + ": '" +
 168                                                             string(event) + "' unknown event, aborting");
 169                         }
 170                 }
 171                 in.close();
 172         }
 173
 174 #ifndef NDEBUG
 175         cerr << "Configuration:" << endl;
 176         for (vector<rule_t>::const_iterator j = rules.begin(); j != rules.end(); j++) {
 177                 cerr << "\t" << (*j).pattern << "\t" << (*j).action << endl;
 178         }
 179         cerr << endl;
 180 #endif
 181
 182         return rules;
 183 }
 184
 185 set<string> pkgadd::make_keep_list(const set<string>& files, const vector<rule_t>& rules) const
 186 {
 187         set<string> keep_list;
 188         vector<rule_t> found;
 189
 190         find_rules(rules, UPGRADE, found);
 191
 192         for (set<string>::const_iterator i = files.begin(); i != files.end(); i++) {
 193                 for (vector<rule_t>::reverse_iterator j = found.rbegin(); j != found.rend(); j++) {
 194                         if (rule_applies_to_file(*j, *i)) {
 195                                 if (!(*j).action)
 196                                         keep_list.insert(keep_list.end(), *i);
 197
 198                                 break;
 199                         }
 200                 }
 201         }
 202
 203 #ifndef NDEBUG
 204         cerr << "Keep list:" << endl;
 205         for (set<string>::const_iterator j = keep_list.begin(); j != keep_list.end(); j++) {
 206                 cerr << "   " << (*j) << endl;
 207         }
 208         cerr << endl;
 209 #endif
 210
 211         return keep_list;
 212 }
 213
 214 set<string> pkgadd::apply_install_rules(const string& name, pkginfo_t& info, const vector<rule_t>& rules)
 215 {
 216         // TODO: better algo(?)
 217         set<string> install_set;
 218         set<string> non_install_set;
 219         vector<rule_t> found;
 220
 221         find_rules(rules, INSTALL, found);
 222
 223         for (set<string>::const_iterator i = info.files.begin(); i != info.files.end(); i++) {
 224                 bool install_file = true;
 225
 226                 for (vector<rule_t>::reverse_iterator j = found.rbegin(); j != found.rend(); j++) {
 227                         if (rule_applies_to_file(*j, *i)) {
 228                                 install_file = (*j).action;
 229                                 break;
 230                         }
 231                 }
 232
 233                 if (install_file)
 234                         install_set.insert(install_set.end(), *i);
 235                 else
 236                         non_install_set.insert(*i);
 237         }
 238
 239         info.files.clear();
 240         info.files = install_set;
 241
 242 #ifndef NDEBUG
 243         cerr << "Install set:" << endl;
 244         for (set<string>::iterator j = info.files.begin(); j != info.files.end(); j++) {
 245                 cerr << "   " << (*j) << endl;
 246         }
 247         cerr << endl;
 248
 249         cerr << "Non-Install set:" << endl;
 250         for (set<string>::iterator j = non_install_set.begin(); j != non_install_set.end(); j++) {
 251                 cerr << "   " << (*j) << endl;
 252         }
 253         cerr << endl;
 254 #endif
 255
 256         return non_install_set;
 257 }
 258
 259 void pkgadd::find_rules(const vector<rule_t>& rules, rule_event_t event, vector<rule_t>& found) const
 260 {
 261         for (vector<rule_t>::const_iterator i = rules.begin(); i != rules.end(); i++)
 262                 if (i->event == event)
 263                         found.push_back(*i);
 264 }
 265
 266 bool pkgadd::rule_applies_to_file(const rule_t& rule, const string& file) const
 267 {
 268         regex_t preg;
 269         bool ret;
 270
 271         if (regcomp(&preg, rule.pattern.c_str(), REG_EXTENDED | REG_NOSUB))
 272                 throw runtime_error("error compiling regular expression '" + rule.pattern + "', aborting");
 273
 274         ret = !regexec(&preg, file.c_str(), 0, 0, 0);
 275         regfree(&preg);
 276
 277         return ret;
 278 }