2 * This file is part of DisOrder.
3 * Copyright (C) 2004, 2005, 2007, 2008 Richard Kettlewell
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 3 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 #include "disorder-server.h"
21 static const struct option options[] = {
22 { "help", no_argument, 0, 'h' },
23 { "version", no_argument, 0, 'V' },
24 { "config", required_argument, 0, 'c' },
25 { "dump", no_argument, 0, 'd' },
26 { "undump", no_argument, 0, 'u' },
27 { "debug", no_argument, 0, 'D' },
28 { "recover", no_argument, 0, 'r' },
29 { "recover-fatal", no_argument, 0, 'R' },
30 { "trackdb", no_argument, 0, 't' },
31 { "searchdb", no_argument, 0, 's' },
32 { "recompute-aliases", no_argument, 0, 'a' },
33 { "remove-pathless", no_argument, 0, 'P' },
37 /* display usage message and terminate */
38 static void help(void) {
40 " disorder-dump [OPTIONS] --dump|--undump PATH\n"
41 " disorder-dump [OPTIONS] --recompute-aliases\n"
43 " --help, -h Display usage message\n"
44 " --version, -V Display version number\n"
45 " --config PATH, -c PATH Set configuration file\n"
46 " --dump, -d Dump state to PATH\n"
47 " --undump, -u Restore state from PATH\n"
48 " --recover, -r Run database recovery\n"
49 " --recompute-aliases, -a Recompute aliases\n"
50 " --remove-pathless, -P Remove pathless tracks\n"
51 " --debug Debug mode\n");
56 /* dump prefs to FP, return nonzero on error */
57 static void do_dump(FILE *fp, const char *tag,
58 int tracksdb, int searchdb) {
61 struct sink *s = sink_stdio(tag, fp);
66 tid = trackdb_begin_transaction();
67 if(fseek(fp, 0, SEEK_SET) < 0)
68 fatal(errno, "error calling fseek");
70 fatal(errno, "error calling fflush");
71 if(ftruncate(fileno(fp), 0) < 0)
72 fatal(errno, "error calling ftruncate");
73 if(fprintf(fp, "V%c\n", (tracksdb || searchdb) ? '1' : '0') < 0)
74 fatal(errno, "error writing to %s", tag);
75 /* dump the preferences */
76 cursor = trackdb_opencursor(trackdb_prefsdb, tid);
77 err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d),
81 || urlencode(s, k.data, k.size)
82 || fputc('\n', fp) < 0
83 || urlencode(s, d.data, d.size)
84 || fputc('\n', fp) < 0)
85 fatal(errno, "error writing to %s", tag);
86 err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d),
89 if(trackdb_closecursor(cursor)) { cursor = 0; goto fail; }
92 /* dump the global preferences */
93 cursor = trackdb_opencursor(trackdb_globaldb, tid);
94 err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d),
98 || urlencode(s, k.data, k.size)
99 || fputc('\n', fp) < 0
100 || urlencode(s, d.data, d.size)
101 || fputc('\n', fp) < 0)
102 fatal(errno, "error writing to %s", tag);
103 err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d),
106 if(trackdb_closecursor(cursor)) { cursor = 0; goto fail; }
110 cursor = trackdb_opencursor(trackdb_usersdb, tid);
111 err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d),
114 if(fputc('U', fp) < 0
115 || urlencode(s, k.data, k.size)
116 || fputc('\n', fp) < 0
117 || urlencode(s, d.data, d.size)
118 || fputc('\n', fp) < 0)
119 fatal(errno, "error writing to %s", tag);
120 err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d),
123 if(trackdb_closecursor(cursor)) { cursor = 0; goto fail; }
126 /* dump the schedule */
127 cursor = trackdb_opencursor(trackdb_scheduledb, tid);
128 err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d),
131 if(fputc('W', fp) < 0
132 || urlencode(s, k.data, k.size)
133 || fputc('\n', fp) < 0
134 || urlencode(s, d.data, d.size)
135 || fputc('\n', fp) < 0)
136 fatal(errno, "error writing to %s", tag);
137 err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d),
140 if(trackdb_closecursor(cursor)) { cursor = 0; goto fail; }
145 cursor = trackdb_opencursor(trackdb_tracksdb, tid);
146 err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d),
149 if(fputc('T', fp) < 0
150 || urlencode(s, k.data, k.size)
151 || fputc('\n', fp) < 0
152 || urlencode(s, d.data, d.size)
153 || fputc('\n', fp) < 0)
154 fatal(errno, "error writing to %s", tag);
155 err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d),
158 if(trackdb_closecursor(cursor)) { cursor = 0; goto fail; }
163 cursor = trackdb_opencursor(trackdb_searchdb, tid);
164 err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d),
167 if(fputc('S', fp) < 0
168 || urlencode(s, k.data, k.size)
169 || fputc('\n', fp) < 0
170 || urlencode(s, d.data, d.size)
171 || fputc('\n', fp) < 0)
172 fatal(errno, "error writing to %s", tag);
173 err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d),
176 if(trackdb_closecursor(cursor)) { cursor = 0; goto fail; } cursor = 0;
179 if(fputs("E\n", fp) < 0) fatal(errno, "error writing to %s", tag);
180 if(err == DB_LOCK_DEADLOCK) {
181 error(0, "c->c_get: %s", db_strerror(err));
184 if(err && err != DB_NOTFOUND)
185 fatal(0, "cursor->c_get: %s", db_strerror(err));
186 if(trackdb_closecursor(cursor)) { cursor = 0; goto fail; }
189 trackdb_closecursor(cursor);
191 info("aborting transaction and retrying dump");
192 trackdb_abort_transaction(tid);
194 trackdb_commit_transaction(tid);
195 if(fflush(fp) < 0) fatal(errno, "error writing to %s", tag);
196 /* caller might not be paranoid so we are paranoid on their behalf */
197 if(fsync(fileno(fp)) < 0) fatal(errno, "error syncing %s", tag);
200 /* delete all aliases prefs, return 0 or DB_LOCK_DEADLOCK */
201 static int remove_aliases(DB_TXN *tid, int remove_pathless) {
208 info("removing aliases");
209 cursor = trackdb_opencursor(trackdb_tracksdb, tid);
210 if((err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d),
211 DB_FIRST)) == DB_LOCK_DEADLOCK) {
212 error(0, "cursor->c_get: %s", db_strerror(err));
216 data = kvp_urldecode(d.data, d.size);
217 alias = !!kvp_get(data, "_alias_for");
218 pathless = !kvp_get(data, "_path");
219 if(pathless && !remove_pathless)
220 info("no _path for %s", utf82mb(xstrndup(k.data, k.size)));
221 if(alias || (remove_pathless && pathless)) {
222 switch(err = cursor->c_del(cursor, 0)) {
224 case DB_LOCK_DEADLOCK:
225 error(0, "cursor->c_get: %s", db_strerror(err));
228 fatal(0, "cursor->c_del: %s", db_strerror(err));
231 err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d), DB_NEXT);
233 if(err == DB_LOCK_DEADLOCK) {
234 error(0, "cursor operation: %s", db_strerror(err));
237 if(err != DB_NOTFOUND) fatal(0, "cursor->c_get: %s", db_strerror(err));
240 if(trackdb_closecursor(cursor) && !err) err = DB_LOCK_DEADLOCK;
244 /* truncate (i.e. empty) a database, return 0 or DB_LOCK_DEADLOCK */
245 static int truncdb(DB_TXN *tid, DB *db) {
249 switch(err = db->truncate(db, tid, &count, 0)) {
251 case DB_LOCK_DEADLOCK:
252 error(0, "db->truncate: %s", db_strerror(err));
255 fatal(0, "db->truncate: %s", db_strerror(err));
260 /* read a DBT from FP, return 0 on success or -1 on input error */
261 static int undump_dbt(FILE *fp, const char *tag, DBT *dbt) {
265 if(inputline(tag, fp, &s, '\n')) return -1;
267 if(urldecode(sink_dynstr(&d), s, strlen(s)))
268 fatal(0, "invalid URL-encoded data in %s", tag);
274 /* undump from FP, return 0 or DB_LOCK_DEADLOCK */
275 static int undump_from_fp(DB_TXN *tid, FILE *fp, const char *tag) {
278 const char *which_name;
282 if(fseek(fp, 0, SEEK_SET) < 0)
283 fatal(errno, "error calling fseek on %s", tag);
284 if((err = truncdb(tid, trackdb_prefsdb))) return err;
285 if((err = truncdb(tid, trackdb_globaldb))) return err;
286 if((err = truncdb(tid, trackdb_searchdb))) return err;
287 if((err = truncdb(tid, trackdb_tagsdb))) return err;
288 if((err = truncdb(tid, trackdb_usersdb))) return err;
289 if((err = truncdb(tid, trackdb_scheduledb))) return err;
291 while(!ferror(fp) && !feof(fp)) {
296 fatal(0, "unknown version '%c'", c);
306 which_db = trackdb_prefsdb;
307 which_name = "prefs.db";
310 which_db = trackdb_globaldb;
311 which_name = "global.db";
314 which_db = trackdb_usersdb;
315 which_name = "users.db";
317 case 'W': /* for 'when' */
318 which_db = trackdb_scheduledb;
319 which_name = "scheduledb.db";
324 if(undump_dbt(fp, tag, prepare_data(&k))
325 || undump_dbt(fp, tag, prepare_data(&d)))
327 switch(err = which_db->put(which_db, tid, &k, &d, 0)) {
330 case DB_LOCK_DEADLOCK:
331 error(0, "error updating %s: %s", which_name, db_strerror(err));
334 fatal(0, "error updating %s: %s", which_name, db_strerror(err));
339 if(undump_dbt(fp, tag, prepare_data(&k))
340 || undump_dbt(fp, tag, prepare_data(&d)))
342 /* We don't restore the tracks.db or search.db entries, instead
343 * we recompute them */
351 fatal(errno, "error reading %s", tag);
353 fatal(0, "unexpected EOF reading %s", tag);
357 /* recompute aliases and search database from prefs, return 0 or
358 * DB_LOCK_DEADLOCK */
359 static int recompute_aliases(DB_TXN *tid) {
364 const char *path, *track;
366 info("recomputing aliases");
367 cursor = trackdb_opencursor(trackdb_tracksdb, tid);
368 if((err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d),
369 DB_FIRST)) == DB_LOCK_DEADLOCK) goto done;
371 data = kvp_urldecode(d.data, d.size);
372 track = xstrndup(k.data, k.size);
373 if(!kvp_get(data, "_alias_for")) {
374 if(!(path = kvp_get(data, "_path")))
375 error(0, "%s is not an alias but has no path", utf82mb(track));
377 if((err = trackdb_notice_tid(track, path, tid)) == DB_LOCK_DEADLOCK)
380 err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d),
389 case DB_LOCK_DEADLOCK:
392 fatal(0, "cursor->c_get: %s", db_strerror(err));
395 if(trackdb_closecursor(cursor) && !err) err = DB_LOCK_DEADLOCK;
399 /* restore prefs from FP */
400 static void do_undump(FILE *fp, const char *tag, int remove_pathless) {
404 tid = trackdb_begin_transaction();
405 if(remove_aliases(tid, remove_pathless)
406 || undump_from_fp(tid, fp, tag)
407 || recompute_aliases(tid)) goto fail;
410 info("aborting transaction and retrying undump");
411 trackdb_abort_transaction(tid);
413 info("committing undump");
414 trackdb_commit_transaction(tid);
417 /* just recompute alisaes */
418 static void do_recompute(int remove_pathless) {
422 tid = trackdb_begin_transaction();
423 if(remove_aliases(tid, remove_pathless)
424 || recompute_aliases(tid)) goto fail;
427 info("aborting transaction and retrying recomputation");
428 trackdb_abort_transaction(tid);
430 info("committing recomputed aliases");
431 trackdb_commit_transaction(tid);
434 int main(int argc, char **argv) {
435 int n, dump = 0, undump = 0, recover = TRACKDB_NO_RECOVER, recompute = 0;
436 int tracksdb = 0, searchdb = 0, remove_pathless = 0, fd;
442 while((n = getopt_long(argc, argv, "hVc:dDutsrRaP", options, 0)) >= 0) {
445 case 'V': version("disorder-dump");
446 case 'c': configfile = optarg; break;
447 case 'd': dump = 1; break;
448 case 'u': undump = 1; break;
449 case 'D': debugging = 1; break;
450 case 't': tracksdb = 1; break;
451 case 's': searchdb = 1; break;
452 case 'r': recover = TRACKDB_NORMAL_RECOVER;
453 case 'R': recover = TRACKDB_FATAL_RECOVER;
454 case 'a': recompute = 1; break;
455 case 'P': remove_pathless = 1; break;
456 default: fatal(0, "invalid option");
459 if(dump + undump + recompute != 1)
460 fatal(0, "choose exactly one of --dump, --undump or --recompute-aliases");
461 if((undump || recompute) && (tracksdb || searchdb))
462 fatal(0, "--trackdb and --searchdb with --undump or --recompute-aliases");
465 fatal(0, "--recompute-aliases does not take a filename");
469 fatal(0, "missing dump file name");
470 if(optind + 1 < argc)
471 fatal(0, "specify only a dump file name");
474 if(config_read(0)) fatal(0, "cannot read configuration");
475 trackdb_init(recover|TRACKDB_MAY_CREATE);
476 trackdb_open(TRACKDB_NO_UPGRADE);
478 /* We write to a temporary file and rename into place. We make
479 * sure the permissions are tight from the start. */
480 byte_xasprintf(&tmp, "%s.%lx.tmp", path, (unsigned long)getpid());
481 if((fd = open(tmp, O_CREAT|O_TRUNC|O_WRONLY, 0600)) < 0)
482 fatal(errno, "error opening %s", tmp);
483 if(!(fp = fdopen(fd, "w")))
484 fatal(errno, "fdopen on %s", tmp);
485 do_dump(fp, tmp, tracksdb, searchdb);
486 if(fclose(fp) < 0) fatal(errno, "error closing %s", tmp);
487 if(rename(tmp, path) < 0)
488 fatal(errno, "error renaming %s to %s", tmp, path);
490 /* the databases or logfiles might end up with wrong permissions
491 * if new ones are created */
492 if(getuid() == 0) info("you might need to chown database files");
493 if(!(fp = fopen(path, "r"))) fatal(errno, "error opening %s", path);
494 do_undump(fp, path, remove_pathless);
496 } else if(recompute) {
497 do_recompute(remove_pathless);