| 1 | /* |
| 2 | * This file is part of DisOrder |
| 3 | * Copyright (C) 2007 Richard Kettlewell |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation; either version 2 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, but |
| 11 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | * General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program; if not, write to the Free Software |
| 17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
| 18 | * USA |
| 19 | */ |
| 20 | |
| 21 | #include <config.h> |
| 22 | #include "types.h" |
| 23 | |
| 24 | #include <string.h> |
| 25 | #include <getopt.h> |
| 26 | #include <db.h> |
| 27 | #include <locale.h> |
| 28 | #include <errno.h> |
| 29 | #include <syslog.h> |
| 30 | #include <pcre.h> |
| 31 | #include <unistd.h> |
| 32 | |
| 33 | #include "syscalls.h" |
| 34 | #include "log.h" |
| 35 | #include "defs.h" |
| 36 | #include "kvp.h" |
| 37 | #include "trackdb.h" |
| 38 | #include "trackdb-int.h" |
| 39 | #include "mem.h" |
| 40 | #include "configuration.h" |
| 41 | #include "unicode.h" |
| 42 | |
| 43 | static DB_TXN *global_tid; |
| 44 | |
| 45 | static const struct option options[] = { |
| 46 | { "help", no_argument, 0, 'h' }, |
| 47 | { "version", no_argument, 0, 'V' }, |
| 48 | { "config", required_argument, 0, 'c' }, |
| 49 | { "debug", no_argument, 0, 'd' }, |
| 50 | { "no-debug", no_argument, 0, 'D' }, |
| 51 | { "syslog", no_argument, 0, 's' }, |
| 52 | { "no-syslog", no_argument, 0, 'S' }, |
| 53 | { 0, 0, 0, 0 } |
| 54 | }; |
| 55 | |
| 56 | /* display usage message and terminate */ |
| 57 | static void help(void) { |
| 58 | xprintf("Usage:\n" |
| 59 | " disorder-dbupgrade [OPTIONS]\n" |
| 60 | "Options:\n" |
| 61 | " --help, -h Display usage message\n" |
| 62 | " --version, -V Display version number\n" |
| 63 | " --config PATH, -c PATH Set configuration file\n" |
| 64 | " --debug, -d Turn on debugging\n" |
| 65 | " --[no-]syslog Force logging\n" |
| 66 | "\n" |
| 67 | "Database upgrader for DisOrder. Not intended to be run\n" |
| 68 | "directly.\n"); |
| 69 | xfclose(stdout); |
| 70 | exit(0); |
| 71 | } |
| 72 | |
| 73 | /* display version number and terminate */ |
| 74 | static void version(void) { |
| 75 | xprintf("disorder-dbupgrade version %s\n", disorder_version_string); |
| 76 | xfclose(stdout); |
| 77 | exit(0); |
| 78 | } |
| 79 | |
| 80 | /** @brief Visit each key in a database and call @p callback |
| 81 | * @return 0 or DB_LOCK_DEADLOCK |
| 82 | * |
| 83 | * @p global_tid must be set. @p callback should return 0 or DB_LOCK_DEADLOCK. |
| 84 | */ |
| 85 | static int scan_core(const char *name, DB *db, |
| 86 | int (*callback)(const char *name, DB *db, DBC *c, |
| 87 | DBT *k, DBT *d)) { |
| 88 | long count = 0; |
| 89 | DBC *c = trackdb_opencursor(db, global_tid); |
| 90 | int err, r = 0; |
| 91 | DBT k[1], d[1]; |
| 92 | |
| 93 | memset(k, 0, sizeof k); |
| 94 | memset(d, 0, sizeof d); |
| 95 | while((err = c->c_get(c, k, d, DB_NEXT)) == 0) { |
| 96 | if((err = callback(name, db, c, k, d))) |
| 97 | break; |
| 98 | ++count; |
| 99 | if(count % 1000 == 0) |
| 100 | info("scanning %s, %ld so far", name, count); |
| 101 | } |
| 102 | if(err && err != DB_NOTFOUND && err != DB_LOCK_DEADLOCK) |
| 103 | fatal(0, "%s: error scanning database: %s", name, db_strerror(err)); |
| 104 | r = (err == DB_LOCK_DEADLOCK ? err : 0); |
| 105 | if((err = c->c_close(c))) |
| 106 | fatal(0, "%s: error closing cursor: %s", name, db_strerror(err)); |
| 107 | return r; |
| 108 | } |
| 109 | |
| 110 | /** @brief Visit each key in a database and call @p callback |
| 111 | * |
| 112 | * Everything happens inside the @p global_tid tranasction. @p callback |
| 113 | * should return 0 or DB_LOCK_DEADLOCK. |
| 114 | */ |
| 115 | static void scan(const char *name, DB *db, |
| 116 | int (*callback)(const char *name, DB *db, DBC *c, |
| 117 | DBT *k, DBT *d)) { |
| 118 | info("scanning %s", name); |
| 119 | for(;;) { |
| 120 | global_tid = trackdb_begin_transaction(); |
| 121 | if(scan_core(name, db, callback)) { |
| 122 | trackdb_abort_transaction(global_tid); |
| 123 | global_tid = 0; |
| 124 | error(0, "detected deadlock, restarting scan"); |
| 125 | continue; |
| 126 | } else { |
| 127 | trackdb_commit_transaction(global_tid); |
| 128 | global_tid = 0; |
| 129 | break; |
| 130 | } |
| 131 | } |
| 132 | } |
| 133 | |
| 134 | /** @brief Truncate database @p db */ |
| 135 | static void truncate_database(const char *name, DB *db) { |
| 136 | u_int32_t count; |
| 137 | int err; |
| 138 | |
| 139 | do { |
| 140 | err = db->truncate(db, 0, &count, DB_AUTO_COMMIT); |
| 141 | } while(err == DB_LOCK_DEADLOCK); |
| 142 | if(err) |
| 143 | fatal(0, "error truncating %s: %s", name, db_strerror(err)); |
| 144 | } |
| 145 | |
| 146 | /* scan callbacks */ |
| 147 | |
| 148 | static int normalize_keys(const char *name, DB *db, DBC *c, |
| 149 | DBT *k, DBT *d) { |
| 150 | char *knfc; |
| 151 | size_t nknfc; |
| 152 | int err; |
| 153 | |
| 154 | /* Find the normalized form of the key */ |
| 155 | knfc = utf8_compose_canon(k->data, k->size, &nknfc); |
| 156 | if(!knfc) |
| 157 | fatal(0, "%s: cannot convert key to NFC: %.*s", name, |
| 158 | (int)k->size, (const char *)k->data); |
| 159 | /* If the key is already in NFC then do nothing */ |
| 160 | if(nknfc == k->size && !memcmp(k->data, knfc, nknfc)) |
| 161 | return 0; |
| 162 | /* To rename the key we must delete the old one and insert a new one */ |
| 163 | if((err = c->c_del(c, 0))) { |
| 164 | if(err != DB_LOCK_DEADLOCK) |
| 165 | fatal(0, "%s: error removing denormalized key: %s", |
| 166 | name, db_strerror(err)); |
| 167 | return err; |
| 168 | } |
| 169 | k->size = nknfc; |
| 170 | k->data = knfc; |
| 171 | if((err = db->put(db, global_tid, k, d, DB_NOOVERWRITE))) { |
| 172 | if(err != DB_LOCK_DEADLOCK) |
| 173 | fatal(0, "%s: error storing normalized key: %s", name, db_strerror(err)); |
| 174 | return err; |
| 175 | } |
| 176 | return 0; |
| 177 | } |
| 178 | |
| 179 | static int normalize_values(const char *name, DB *db, |
| 180 | DBC attribute((unused)) *c, |
| 181 | DBT *k, DBT *d) { |
| 182 | char *dnfc; |
| 183 | size_t ndnfc; |
| 184 | int err; |
| 185 | |
| 186 | /* Find the normalized form of the value */ |
| 187 | dnfc = utf8_compose_canon(d->data, d->size, &ndnfc); |
| 188 | if(!dnfc) |
| 189 | fatal(0, "%s: cannot convert data to NFC: %.*s", name, |
| 190 | (int)d->size, (const char *)d->data); |
| 191 | /* If the key is already in NFC then do nothing */ |
| 192 | if(ndnfc == d->size && !memcmp(d->data, dnfc, ndnfc)) |
| 193 | return 0; |
| 194 | d->size = ndnfc; |
| 195 | d->data = dnfc; |
| 196 | if((err = db->put(db, global_tid, k, d, 0))) { |
| 197 | if(err != DB_LOCK_DEADLOCK) |
| 198 | fatal(0, "%s: error storing normalized data: %s", name, db_strerror(err)); |
| 199 | return err; |
| 200 | } |
| 201 | return 0; |
| 202 | } |
| 203 | |
| 204 | static int renotice(const char *name, DB attribute((unused)) *db, |
| 205 | DBC attribute((unused)) *c, |
| 206 | DBT *k, DBT *d) { |
| 207 | const struct kvp *const t = kvp_urldecode(d->data, d->size); |
| 208 | const char *const track = xstrndup(k->data, k->size); |
| 209 | const char *const path = kvp_get(t, "_path"); |
| 210 | int err; |
| 211 | |
| 212 | if(!path) |
| 213 | fatal(0, "%s: no '_path' for %.*s", name, |
| 214 | (int)k->size, (const char *)k->data); |
| 215 | switch(err = trackdb_notice_tid(track, path, global_tid)) { |
| 216 | case 0: |
| 217 | return 0; |
| 218 | case DB_LOCK_DEADLOCK: |
| 219 | return err; |
| 220 | default: |
| 221 | fatal(0, "%s: unexpected return from trackdb_notice_tid: %s", |
| 222 | name, db_strerror(err)); |
| 223 | } |
| 224 | } |
| 225 | |
| 226 | static int remove_aliases_normalize_keys(const char *name, DB *db, DBC *c, |
| 227 | DBT *k, DBT *d) { |
| 228 | const struct kvp *const t = kvp_urldecode(d->data, d->size); |
| 229 | int err; |
| 230 | |
| 231 | if(kvp_get(t, "_alias_for")) { |
| 232 | /* This is an alias. We remove all the alias entries. */ |
| 233 | if((err = c->c_del(c, 0))) { |
| 234 | if(err != DB_LOCK_DEADLOCK) |
| 235 | fatal(0, "%s: error removing alias: %s", name, db_strerror(err)); |
| 236 | return err; |
| 237 | } |
| 238 | return 0; |
| 239 | } |
| 240 | return normalize_keys(name, db, c, k, d); |
| 241 | } |
| 242 | |
| 243 | /** @brief Upgrade the database to the current version |
| 244 | * |
| 245 | * This function is supposed to be idempotent, so if it is interrupted |
| 246 | * half way through it is safe to restart. |
| 247 | */ |
| 248 | static void upgrade(void) { |
| 249 | char buf[32]; |
| 250 | |
| 251 | info("upgrading database to dbversion %ld", config->dbversion); |
| 252 | /* Normalize keys and values as required. We will also remove aliases as |
| 253 | * they will be regenerated when we re-noticed the tracks. */ |
| 254 | info("renormalizing keys"); |
| 255 | scan("tracks.db", trackdb_tracksdb, remove_aliases_normalize_keys); |
| 256 | scan("prefs.db", trackdb_prefsdb, normalize_keys); |
| 257 | scan("global.db", trackdb_globaldb, normalize_keys); |
| 258 | scan("noticed.db", trackdb_noticeddb, normalize_values); |
| 259 | /* search.db and tags.db we will rebuild */ |
| 260 | info("regenerating search database and aliases"); |
| 261 | truncate_database("search.db", trackdb_searchdb); |
| 262 | truncate_database("tags.db", trackdb_tagsdb); |
| 263 | /* Regenerate the search database and aliases */ |
| 264 | scan("tracks.db", trackdb_tracksdb, renotice); |
| 265 | /* Finally update the database version */ |
| 266 | snprintf(buf, sizeof buf, "%ld", config->dbversion); |
| 267 | trackdb_set_global("_dbversion", buf, 0); |
| 268 | info("completed database upgrade"); |
| 269 | } |
| 270 | |
| 271 | int main(int argc, char **argv) { |
| 272 | int n, logsyslog = !isatty(2); |
| 273 | |
| 274 | set_progname(argv); |
| 275 | mem_init(); |
| 276 | if(!setlocale(LC_CTYPE, "")) fatal(errno, "error calling setlocale"); |
| 277 | while((n = getopt_long(argc, argv, "hVc:dDSs", options, 0)) >= 0) { |
| 278 | switch(n) { |
| 279 | case 'h': help(); |
| 280 | case 'V': version(); |
| 281 | case 'c': configfile = optarg; break; |
| 282 | case 'd': debugging = 1; break; |
| 283 | case 'D': debugging = 0; break; |
| 284 | case 'S': logsyslog = 0; break; |
| 285 | case 's': logsyslog = 1; break; |
| 286 | default: fatal(0, "invalid option"); |
| 287 | } |
| 288 | } |
| 289 | /* If stderr is a TTY then log there, otherwise to syslog. */ |
| 290 | if(logsyslog) { |
| 291 | openlog(progname, LOG_PID, LOG_DAEMON); |
| 292 | log_default = &log_syslog; |
| 293 | } |
| 294 | if(config_read(0)) fatal(0, "cannot read configuration"); |
| 295 | /* Open the database */ |
| 296 | trackdb_init(TRACKDB_NO_RECOVER); |
| 297 | trackdb_open(TRACKDB_OPEN_FOR_UPGRADE); |
| 298 | upgrade(); |
| 299 | return 0; |
| 300 | } |
| 301 | |
| 302 | /* |
| 303 | Local Variables: |
| 304 | c-basic-offset:2 |
| 305 | comment-column:40 |
| 306 | fill-column:79 |
| 307 | indent-tabs-mode:nil |
| 308 | End: |
| 309 | */ |