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log: fix deadlock when using systemd logging - fixes #8621
In this commit the logging system was re-worked dfa4d948279f3e36 fs: Remove github.com/sirupsen/logrus and replace with log/slog Unfortunately the systemd logging was still using the plain log package and this caused a deadlock as it was recursively calling the logging package. The fix was to use the dedicated systemd journal logging routines in the process removing a TODO!
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@ -5,10 +5,7 @@
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package log
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import (
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"fmt"
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"log"
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"log/slog"
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"strconv"
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"github.com/coreos/go-systemd/v22/journal"
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"github.com/rclone/rclone/fs"
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@ -18,10 +15,8 @@ import (
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func startSystemdLog(handler *OutputHandler) bool {
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handler.clearFormatFlags(logFormatDate | logFormatTime | logFormatMicroseconds | logFormatUTC | logFormatLongFile | logFormatShortFile | logFormatPid)
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handler.setFormatFlags(logFormatNoLevel)
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// TODO: Use the native journal.Print approach rather than a custom implementation
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handler.SetOutput(func(level slog.Level, text string) {
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text = fmt.Sprintf("<%s>%-6s: %s", systemdLogPrefix(level), level, text)
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_ = log.Output(4, text)
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_ = journal.Print(slogLevelToSystemdPriority(level), "%-6s: %s\n", level, text)
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})
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return true
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}
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@ -37,12 +32,12 @@ var slogLevelToSystemdPrefix = map[slog.Level]journal.Priority{
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slog.LevelDebug: journal.PriDebug,
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}
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func systemdLogPrefix(l slog.Level) string {
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func slogLevelToSystemdPriority(l slog.Level) journal.Priority {
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prio, ok := slogLevelToSystemdPrefix[l]
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if !ok {
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return ""
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return journal.PriInfo
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}
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return strconv.Itoa(int(prio))
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return prio
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}
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func isJournalStream() bool {
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