087a9f70c5
Doxygen documentation update: * Changed alls @addtogroup to @ingroup. @addtogroup adds the comment to the group description, but doesn't add the file, class, function, ... to the group like @ingroup does. See for example http://svn.wikimedia.org/doc/group__SpecialPage.html where it's impossible to see related files, classes, ... that should belong to that group. * Added @file to file description, it seems that it should be explicitely decalred for file descriptions, otherwise doxygen will think that the comment document the first class, variabled, function, ... that is in that file. * Removed some empty comments * Removed some ?> Added following groups: * ExternalStorage * JobQueue * MaintenanceLanguage One more thing: there are still a lot of warnings when generating the doc.
106 lines
2.9 KiB
PHP
106 lines
2.9 KiB
PHP
<?php
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/**
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* This script fixes timestamp corruption caused by one or more webservers
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* temporarily being set to the wrong time. The time offset must be known and
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* consistent. Start and end times (in 14-character format) restrict the search,
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* and must bracket the damage. There must be a majority of good timestamps in the
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* search period.
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*
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* @file
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* @ingroup Maintenance
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*/
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require_once( 'commandLine.inc' );
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if ( count( $args ) < 3 ) {
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echo "Usage: php fixTimestamps.php <offset in hours> <start time> <end time>\n";
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exit(1);
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}
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$offset = $args[0] * 3600;
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$start = $args[1];
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$end = $args[2];
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$fname = 'fixTimestamps.php';
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$grace = 60; // maximum normal clock offset
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# Find bounding revision IDs
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$dbw = wfGetDB( DB_MASTER );
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$revisionTable = $dbw->tableName( 'revision' );
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$res = $dbw->query( "SELECT MIN(rev_id) as minrev, MAX(rev_id) as maxrev FROM $revisionTable " .
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"WHERE rev_timestamp BETWEEN '{$start}' AND '{$end}'", $fname );
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$row = $dbw->fetchObject( $res );
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if ( is_null( $row->minrev ) ) {
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echo "No revisions in search period.\n";
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exit(0);
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}
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$minRev = $row->minrev;
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$maxRev = $row->maxrev;
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# Select all timestamps and IDs
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$sql = "SELECT rev_id, rev_timestamp FROM $revisionTable " .
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"WHERE rev_id BETWEEN $minRev AND $maxRev";
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if ( $offset > 0 ) {
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$sql .= " ORDER BY rev_id DESC";
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$expectedSign = -1;
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} else {
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$expectedSign = 1;
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}
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$res = $dbw->query( $sql, $fname );
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$lastNormal = 0;
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$badRevs = array();
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$numGoodRevs = 0;
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while ( $row = $dbw->fetchObject( $res ) ) {
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$timestamp = wfTimestamp( TS_UNIX, $row->rev_timestamp );
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$delta = $timestamp - $lastNormal;
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$sign = $delta == 0 ? 0 : $delta / abs( $delta );
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if ( $sign == 0 || $sign == $expectedSign ) {
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// Monotonic change
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$lastNormal = $timestamp;
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++ $numGoodRevs;
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continue;
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} elseif ( abs( $delta ) <= $grace ) {
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// Non-monotonic change within grace interval
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++ $numGoodRevs;
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continue;
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} else {
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// Non-monotonic change larger than grace interval
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$badRevs[] = $row->rev_id;
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}
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}
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$dbw->freeResult( $res );
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$numBadRevs = count( $badRevs );
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if ( $numBadRevs > $numGoodRevs ) {
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echo
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"The majority of revisions in the search interval are marked as bad.
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Are you sure the offset ($offset) has the right sign? Positive means the clock
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was incorrectly set forward, negative means the clock was incorrectly set back.
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If the offset is right, then increase the search interval until there are enough
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good revisions to provide a majority reference.
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";
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exit(1);
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} elseif ( $numBadRevs == 0 ) {
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echo "No bad revisions found.\n";
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exit(0);
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}
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printf( "Fixing %d revisions (%.2f%% of revisions in search interval)\n",
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$numBadRevs, $numBadRevs / ($numGoodRevs + $numBadRevs) * 100 );
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$fixup = -$offset;
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$sql = "UPDATE $revisionTable " .
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"SET rev_timestamp=DATE_FORMAT(DATE_ADD(rev_timestamp, INTERVAL $fixup SECOND), '%Y%m%d%H%i%s') " .
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"WHERE rev_id IN (" . $dbw->makeList( $badRevs ) . ')';
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//echo "$sql\n";
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$dbw->query( $sql, $fname );
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echo "Done\n";
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