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Logging: Add a symlink for e.g. system.log to system_todaysdate.log for log parsing (https://github.com/opnsense/core/issues/4993)

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same same as dd6a04a68a, but different.
Concerns fixed in this commit:

o archive shouldn't generate files so old "archived" files remain untouched
o "latest.log" should point to the latest version know, which could be todays or a file from the past
o better to not remove links when unchanged to prevent excessive writes
This commit is contained in:
Ad Schellevis 2021-11-18 17:06:40 +01:00
parent 8802b0ced1
commit aba58e5ee4
1 changed files with 8 additions and 8 deletions
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16
src/opnsense/scripts/syslog/log_archive
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@ -54,17 +54,17 @@ foreach(new RecursiveIteratorIterator($it) as $file) {
// remove expired logs and set latest.log symlink
foreach ($relevant_logs as $log_subject => $items) {
rsort($items);
if (count($items) > $preserve_logs) {
rsort($items);
foreach (array_slice($items, $preserve_logs) as $filename) {
@unlink($filename);
}
}
$target = "/var/log/{$log_subject}/{$log_subject}_" . date('Ymd') . '.log';
$link = "/var/log/{$log_subject}/latest.log";
@touch($target);
@unlink($link);
@symlink($target, $link);
// latest is always top of rsorted list $items[0]
$current_target = @readlink($link);
if ($current_target != $items[0]) {
$link = "/var/log/{$log_subject}/latest.log";
@unlink($link);
@symlink($items[0], $link);
}
}