* This file is part of DisOrder.
* Copyright (C) 2004, 2005, 2007, 2008 Richard Kettlewell
*
- * This program is free software; you can redistribute it and/or modify
+ * This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
+ * the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
* You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
- * USA
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+/** @file server/dump.c
+ * @brief Dump and restore database contents
*/
-
#include "disorder-server.h"
+enum {
+ NO_SETUID = UCHAR_MAX + 1,
+};
+
static const struct option options[] = {
{ "help", no_argument, 0, 'h' },
{ "version", no_argument, 0, 'V' },
{ "debug", no_argument, 0, 'D' },
{ "recover", no_argument, 0, 'r' },
{ "recover-fatal", no_argument, 0, 'R' },
- { "trackdb", no_argument, 0, 't' },
- { "searchdb", no_argument, 0, 's' },
{ "recompute-aliases", no_argument, 0, 'a' },
{ "remove-pathless", no_argument, 0, 'P' },
+ { "no-setuid", no_argument, 0, NO_SETUID },
{ 0, 0, 0, 0 }
};
" --recover, -r Run database recovery\n"
" --recompute-aliases, -a Recompute aliases\n"
" --remove-pathless, -P Remove pathless tracks\n"
+ " --no-setuid Do not become jukebox user\n"
" --debug Debug mode\n");
xfclose(stdout);
exit(0);
}
+/** @brief Dump one record
+ * @param s Output stream
+ * @param tag Tag for error messages
+ * @param letter Prefix leter for dumped record
+ * @param dbname Database name
+ * @param db Database handle
+ * @param tid Transaction handle
+ * @return 0 or @c DB_LOCK_DEADLOCK
+ */
+static int dump_one(struct sink *s,
+ const char *tag,
+ int letter,
+ const char *dbname,
+ DB *db,
+ DB_TXN *tid) {
+ int err;
+ DBC *cursor;
+ DBT k, d;
+
+ /* dump the preferences */
+ cursor = trackdb_opencursor(db, tid);
+ err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d),
+ DB_FIRST);
+ while(err == 0) {
+ if(sink_writec(s, letter) < 0
+ || urlencode(s, k.data, k.size)
+ || sink_writec(s, '\n') < 0
+ || urlencode(s, d.data, d.size)
+ || sink_writec(s, '\n') < 0)
+ disorder_fatal(errno, "error writing to %s", tag);
+ err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d),
+ DB_NEXT);
+ }
+ switch(err) {
+ case DB_LOCK_DEADLOCK:
+ trackdb_closecursor(cursor);
+ return err;
+ case DB_NOTFOUND:
+ return trackdb_closecursor(cursor);
+ case 0:
+ assert(!"cannot happen");
+ default:
+ disorder_fatal(0, "error reading %s: %s", dbname, db_strerror(err));
+ }
+}
+
+static struct {
+ int letter;
+ const char *dbname;
+ DB **db;
+} dbtable[] = {
+ { 'P', "prefs.db", &trackdb_prefsdb },
+ { 'G', "global.db", &trackdb_globaldb },
+ { 'U', "users.db", &trackdb_usersdb },
+ { 'W', "schedule.db", &trackdb_scheduledb },
+ { 'L', "playlists.db", &trackdb_playlistsdb },
+ /* avoid 'T' and 'S' for now */
+};
+#define NDBTABLE (sizeof dbtable / sizeof *dbtable)
+
/* dump prefs to FP, return nonzero on error */
-static void do_dump(FILE *fp, const char *tag,
- int tracksdb, int searchdb) {
- DBC *cursor = 0;
+static void do_dump(FILE *fp, const char *tag) {
DB_TXN *tid;
struct sink *s = sink_stdio(tag, fp);
- int err;
- DBT k, d;
for(;;) {
tid = trackdb_begin_transaction();
if(fseek(fp, 0, SEEK_SET) < 0)
- fatal(errno, "error calling fseek");
+ disorder_fatal(errno, "error calling fseek");
if(fflush(fp) < 0)
- fatal(errno, "error calling fflush");
+ disorder_fatal(errno, "error calling fflush");
if(ftruncate(fileno(fp), 0) < 0)
- fatal(errno, "error calling ftruncate");
- if(fprintf(fp, "V%c\n", (tracksdb || searchdb) ? '1' : '0') < 0)
- fatal(errno, "error writing to %s", tag);
- /* dump the preferences */
- cursor = trackdb_opencursor(trackdb_prefsdb, tid);
- err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d),
- DB_FIRST);
- while(err == 0) {
- if(fputc('P', fp) < 0
- || urlencode(s, k.data, k.size)
- || fputc('\n', fp) < 0
- || urlencode(s, d.data, d.size)
- || fputc('\n', fp) < 0)
- fatal(errno, "error writing to %s", tag);
- err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d),
- DB_NEXT);
- }
- if(trackdb_closecursor(cursor)) { cursor = 0; goto fail; }
- cursor = 0;
-
- /* dump the global preferences */
- cursor = trackdb_opencursor(trackdb_globaldb, tid);
- err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d),
- DB_FIRST);
- while(err == 0) {
- if(fputc('G', fp) < 0
- || urlencode(s, k.data, k.size)
- || fputc('\n', fp) < 0
- || urlencode(s, d.data, d.size)
- || fputc('\n', fp) < 0)
- fatal(errno, "error writing to %s", tag);
- err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d),
- DB_NEXT);
- }
- if(trackdb_closecursor(cursor)) { cursor = 0; goto fail; }
- cursor = 0;
-
- /* dump the users */
- cursor = trackdb_opencursor(trackdb_usersdb, tid);
- err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d),
- DB_FIRST);
- while(err == 0) {
- if(fputc('U', fp) < 0
- || urlencode(s, k.data, k.size)
- || fputc('\n', fp) < 0
- || urlencode(s, d.data, d.size)
- || fputc('\n', fp) < 0)
- fatal(errno, "error writing to %s", tag);
- err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d),
- DB_NEXT);
- }
- if(trackdb_closecursor(cursor)) { cursor = 0; goto fail; }
- cursor = 0;
-
- /* dump the schedule */
- cursor = trackdb_opencursor(trackdb_scheduledb, tid);
- err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d),
- DB_FIRST);
- while(err == 0) {
- if(fputc('W', fp) < 0
- || urlencode(s, k.data, k.size)
- || fputc('\n', fp) < 0
- || urlencode(s, d.data, d.size)
- || fputc('\n', fp) < 0)
- fatal(errno, "error writing to %s", tag);
- err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d),
- DB_NEXT);
- }
- if(trackdb_closecursor(cursor)) { cursor = 0; goto fail; }
- cursor = 0;
+ disorder_fatal(errno, "error calling ftruncate");
+ if(fprintf(fp, "V0") < 0)
+ disorder_fatal(errno, "error writing to %s", tag);
+ for(size_t n = 0; n < NDBTABLE; ++n)
+ if(dump_one(s, tag,
+ dbtable[n].letter, dbtable[n].dbname, *dbtable[n].db,
+ tid))
+ goto fail;
-
- if(tracksdb) {
- cursor = trackdb_opencursor(trackdb_tracksdb, tid);
- err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d),
- DB_FIRST);
- while(err == 0) {
- if(fputc('T', fp) < 0
- || urlencode(s, k.data, k.size)
- || fputc('\n', fp) < 0
- || urlencode(s, d.data, d.size)
- || fputc('\n', fp) < 0)
- fatal(errno, "error writing to %s", tag);
- err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d),
- DB_NEXT);
- }
- if(trackdb_closecursor(cursor)) { cursor = 0; goto fail; }
- cursor = 0;
- }
-
- if(searchdb) {
- cursor = trackdb_opencursor(trackdb_searchdb, tid);
- err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d),
- DB_FIRST);
- while(err == 0) {
- if(fputc('S', fp) < 0
- || urlencode(s, k.data, k.size)
- || fputc('\n', fp) < 0
- || urlencode(s, d.data, d.size)
- || fputc('\n', fp) < 0)
- fatal(errno, "error writing to %s", tag);
- err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d),
- DB_NEXT);
- }
- if(trackdb_closecursor(cursor)) { cursor = 0; goto fail; } cursor = 0;
- }
-
- if(fputs("E\n", fp) < 0) fatal(errno, "error writing to %s", tag);
- if(err == DB_LOCK_DEADLOCK) {
- error(0, "c->c_get: %s", db_strerror(err));
- goto fail;
- }
- if(err && err != DB_NOTFOUND)
- fatal(0, "cursor->c_get: %s", db_strerror(err));
- if(trackdb_closecursor(cursor)) { cursor = 0; goto fail; }
+ if(fputs("E\n", fp) < 0)
+ disorder_fatal(errno, "error writing to %s", tag);
break;
fail:
- trackdb_closecursor(cursor);
- cursor = 0;
- info("aborting transaction and retrying dump");
+ disorder_info("aborting transaction and retrying dump");
trackdb_abort_transaction(tid);
}
trackdb_commit_transaction(tid);
- if(fflush(fp) < 0) fatal(errno, "error writing to %s", tag);
+ if(fflush(fp) < 0) disorder_fatal(errno, "error writing to %s", tag);
/* caller might not be paranoid so we are paranoid on their behalf */
- if(fsync(fileno(fp)) < 0) fatal(errno, "error syncing %s", tag);
+ if(fsync(fileno(fp)) < 0) disorder_fatal(errno, "error syncing %s", tag);
}
/* delete all aliases prefs, return 0 or DB_LOCK_DEADLOCK */
struct kvp *data;
int alias, pathless;
- info("removing aliases");
+ disorder_info("removing aliases");
cursor = trackdb_opencursor(trackdb_tracksdb, tid);
if((err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d),
DB_FIRST)) == DB_LOCK_DEADLOCK) {
- error(0, "cursor->c_get: %s", db_strerror(err));
+ disorder_error(0, "cursor->c_get: %s", db_strerror(err));
goto done;
}
while(err == 0) {
alias = !!kvp_get(data, "_alias_for");
pathless = !kvp_get(data, "_path");
if(pathless && !remove_pathless)
- info("no _path for %s", utf82mb(xstrndup(k.data, k.size)));
+ disorder_info("no _path for %s", utf82mb(xstrndup(k.data, k.size)));
if(alias || (remove_pathless && pathless)) {
switch(err = cursor->c_del(cursor, 0)) {
case 0: break;
case DB_LOCK_DEADLOCK:
- error(0, "cursor->c_get: %s", db_strerror(err));
+ disorder_error(0, "cursor->c_get: %s", db_strerror(err));
goto done;
default:
- fatal(0, "cursor->c_del: %s", db_strerror(err));
+ disorder_fatal(0, "cursor->c_del: %s", db_strerror(err));
}
}
err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d), DB_NEXT);
}
if(err == DB_LOCK_DEADLOCK) {
- error(0, "cursor operation: %s", db_strerror(err));
+ disorder_error(0, "cursor operation: %s", db_strerror(err));
goto done;
}
- if(err != DB_NOTFOUND) fatal(0, "cursor->c_get: %s", db_strerror(err));
+ if(err != DB_NOTFOUND)
+ disorder_fatal(0, "cursor->c_get: %s", db_strerror(err));
err = 0;
done:
if(trackdb_closecursor(cursor) && !err) err = DB_LOCK_DEADLOCK;
switch(err = db->truncate(db, tid, &count, 0)) {
case 0: break;
case DB_LOCK_DEADLOCK:
- error(0, "db->truncate: %s", db_strerror(err));
+ disorder_error(0, "db->truncate: %s", db_strerror(err));
break;
default:
- fatal(0, "db->truncate: %s", db_strerror(err));
+ disorder_fatal(0, "db->truncate: %s", db_strerror(err));
}
return err;
}
if(inputline(tag, fp, &s, '\n')) return -1;
dynstr_init(&d);
if(urldecode(sink_dynstr(&d), s, strlen(s)))
- fatal(0, "invalid URL-encoded data in %s", tag);
+ disorder_fatal(0, "invalid URL-encoded data in %s", tag);
dbt->data = d.vec;
dbt->size = d.nvec;
return 0;
/* undump from FP, return 0 or DB_LOCK_DEADLOCK */
static int undump_from_fp(DB_TXN *tid, FILE *fp, const char *tag) {
int err, c;
- DBT k, d;
- const char *which_name;
- DB *which_db;
- info("undumping");
+ disorder_info("undumping");
if(fseek(fp, 0, SEEK_SET) < 0)
- fatal(errno, "error calling fseek on %s", tag);
+ disorder_fatal(errno, "error calling fseek on %s", tag);
if((err = truncdb(tid, trackdb_prefsdb))) return err;
if((err = truncdb(tid, trackdb_globaldb))) return err;
if((err = truncdb(tid, trackdb_searchdb))) return err;
if((err = truncdb(tid, trackdb_scheduledb))) return err;
c = getc(fp);
while(!ferror(fp) && !feof(fp)) {
+ for(size_t n = 0; n < NDBTABLE; ++n) {
+ if(dbtable[n].letter == c) {
+ DB *db = *dbtable[n].db;
+ const char *dbname = dbtable[n].dbname;
+ DBT k, d;
+
+ if(undump_dbt(fp, tag, prepare_data(&k))
+ || undump_dbt(fp, tag, prepare_data(&d)))
+ break;
+ switch(err = db->put(db, tid, &k, &d, 0)) {
+ case 0:
+ break;
+ case DB_LOCK_DEADLOCK:
+ disorder_error(0, "error updating %s: %s", dbname, db_strerror(err));
+ return err;
+ default:
+ disorder_fatal(0, "error updating %s: %s", dbname, db_strerror(err));
+ }
+ goto next;
+ }
+ }
+
switch(c) {
case 'V':
c = getc(fp);
if(c != '0')
- fatal(0, "unknown version '%c'", c);
+ disorder_fatal(0, "unknown version '%c'", c);
break;
case 'E':
return 0;
- case 'P':
- case 'G':
- case 'U':
- case 'W':
- switch(c) {
- case 'P':
- which_db = trackdb_prefsdb;
- which_name = "prefs.db";
- break;
- case 'G':
- which_db = trackdb_globaldb;
- which_name = "global.db";
- break;
- case 'U':
- which_db = trackdb_usersdb;
- which_name = "users.db";
- break;
- case 'W': /* for 'when' */
- which_db = trackdb_scheduledb;
- which_name = "scheduledb.db";
- break;
- default:
- abort();
- }
- if(undump_dbt(fp, tag, prepare_data(&k))
- || undump_dbt(fp, tag, prepare_data(&d)))
- break;
- switch(err = which_db->put(which_db, tid, &k, &d, 0)) {
- case 0:
- break;
- case DB_LOCK_DEADLOCK:
- error(0, "error updating %s: %s", which_name, db_strerror(err));
- return err;
- default:
- fatal(0, "error updating %s: %s", which_name, db_strerror(err));
- }
- break;
- case 'T':
- case 'S':
- if(undump_dbt(fp, tag, prepare_data(&k))
- || undump_dbt(fp, tag, prepare_data(&d)))
- break;
- /* We don't restore the tracks.db or search.db entries, instead
- * we recompute them */
- break;
case '\n':
break;
+ default:
+ if(c >= 32 && c <= 126)
+ disorder_fatal(0, "unexpected character '%c'", c);
+ else
+ disorder_fatal(0, "unexpected character 0x%02X", c);
}
+ next:
c = getc(fp);
}
if(ferror(fp))
- fatal(errno, "error reading %s", tag);
+ disorder_fatal(errno, "error reading %s", tag);
else
- fatal(0, "unexpected EOF reading %s", tag);
+ disorder_fatal(0, "unexpected EOF reading %s", tag);
return 0;
}
struct kvp *data;
const char *path, *track;
- info("recomputing aliases");
+ disorder_info("recomputing aliases");
cursor = trackdb_opencursor(trackdb_tracksdb, tid);
if((err = cursor->c_get(cursor, prepare_data(&k), prepare_data(&d),
DB_FIRST)) == DB_LOCK_DEADLOCK) goto done;
track = xstrndup(k.data, k.size);
if(!kvp_get(data, "_alias_for")) {
if(!(path = kvp_get(data, "_path")))
- error(0, "%s is not an alias but has no path", utf82mb(track));
+ disorder_error(0, "%s is not an alias but has no path", utf82mb(track));
else
if((err = trackdb_notice_tid(track, path, tid)) == DB_LOCK_DEADLOCK)
goto done;
case DB_LOCK_DEADLOCK:
break;
default:
- fatal(0, "cursor->c_get: %s", db_strerror(err));
+ disorder_fatal(0, "cursor->c_get: %s", db_strerror(err));
}
done:
if(trackdb_closecursor(cursor) && !err) err = DB_LOCK_DEADLOCK;
|| recompute_aliases(tid)) goto fail;
break;
fail:
- info("aborting transaction and retrying undump");
+ disorder_info("aborting transaction and retrying undump");
trackdb_abort_transaction(tid);
}
- info("committing undump");
+ disorder_info("committing undump");
trackdb_commit_transaction(tid);
}
|| recompute_aliases(tid)) goto fail;
break;
fail:
- info("aborting transaction and retrying recomputation");
+ disorder_info("aborting transaction and retrying recomputation");
trackdb_abort_transaction(tid);
}
- info("committing recomputed aliases");
+ disorder_info("committing recomputed aliases");
trackdb_commit_transaction(tid);
}
int main(int argc, char **argv) {
int n, dump = 0, undump = 0, recover = TRACKDB_NO_RECOVER, recompute = 0;
- int tracksdb = 0, searchdb = 0, remove_pathless = 0, fd;
+ int remove_pathless = 0, fd;
+ int changeuid = !getuid();
const char *path;
char *tmp;
FILE *fp;
mem_init();
- while((n = getopt_long(argc, argv, "hVc:dDutsrRaP", options, 0)) >= 0) {
+ while((n = getopt_long(argc, argv, "hVc:dDurRaPR", options, 0)) >= 0) {
switch(n) {
case 'h': help();
case 'V': version("disorder-dump");
case 'd': dump = 1; break;
case 'u': undump = 1; break;
case 'D': debugging = 1; break;
- case 't': tracksdb = 1; break;
- case 's': searchdb = 1; break;
- case 'r': recover = TRACKDB_NORMAL_RECOVER;
- case 'R': recover = TRACKDB_FATAL_RECOVER;
+ case 'r': recover = TRACKDB_NORMAL_RECOVER; break;
+ case 'R': recover = TRACKDB_FATAL_RECOVER; break;
case 'a': recompute = 1; break;
case 'P': remove_pathless = 1; break;
- default: fatal(0, "invalid option");
+ case NO_SETUID: changeuid = 0; break;
+ default: disorder_fatal(0, "invalid option");
}
}
if(dump + undump + recompute != 1)
- fatal(0, "choose exactly one of --dump, --undump or --recompute-aliases");
- if((undump || recompute) && (tracksdb || searchdb))
- fatal(0, "--trackdb and --searchdb with --undump or --recompute-aliases");
+ disorder_fatal(0, "choose exactly one of --dump, --undump or --recompute-aliases");
if(recompute) {
if(optind != argc)
- fatal(0, "--recompute-aliases does not take a filename");
+ disorder_fatal(0, "--recompute-aliases does not take a filename");
path = 0;
} else {
if(optind >= argc)
- fatal(0, "missing dump file name");
+ disorder_fatal(0, "missing dump file name");
if(optind + 1 < argc)
- fatal(0, "specify only a dump file name");
+ disorder_fatal(0, "specify only a dump file name");
path = argv[optind];
}
- if(config_read(0)) fatal(0, "cannot read configuration");
+ if(config_read(0, NULL))
+ disorder_fatal(0, "cannot read configuration");
trackdb_init(recover|TRACKDB_MAY_CREATE);
trackdb_open(TRACKDB_NO_UPGRADE);
if(dump) {
* sure the permissions are tight from the start. */
byte_xasprintf(&tmp, "%s.%lx.tmp", path, (unsigned long)getpid());
if((fd = open(tmp, O_CREAT|O_TRUNC|O_WRONLY, 0600)) < 0)
- fatal(errno, "error opening %s", tmp);
+ disorder_fatal(errno, "error opening %s", tmp);
if(!(fp = fdopen(fd, "w")))
- fatal(errno, "fdopen on %s", tmp);
- do_dump(fp, tmp, tracksdb, searchdb);
- if(fclose(fp) < 0) fatal(errno, "error closing %s", tmp);
+ disorder_fatal(errno, "fdopen on %s", tmp);
+ do_dump(fp, tmp);
+ if(fclose(fp) < 0) disorder_fatal(errno, "error closing %s", tmp);
if(rename(tmp, path) < 0)
- fatal(errno, "error renaming %s to %s", tmp, path);
+ disorder_fatal(errno, "error renaming %s to %s", tmp, path);
} else if(undump) {
+ /* Open the dump file before changing UID */
+ if(!(fp = fopen(path, "r")))
+ disorder_fatal(errno, "error opening %s", path);
+ if(changeuid)
+ become_mortal();
/* the databases or logfiles might end up with wrong permissions
* if new ones are created */
- if(getuid() == 0) info("you might need to chown database files");
- if(!(fp = fopen(path, "r"))) fatal(errno, "error opening %s", path);
+ if(getuid() == 0)
+ disorder_info("you might need to chown database files");
do_undump(fp, path, remove_pathless);
xfclose(fp);
} else if(recompute) {
do_recompute(remove_pathless);
}
trackdb_close();
- trackdb_deinit();
+ trackdb_deinit(NULL);
return 0;
}
~mdw / disorder / blobdiff