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Fix log granularity based on Nick's comments.
Instead of rejecting a value that doesn't divide into 1 second, round to the nearest divisor of 1 second and warn. Document that the option only controls the granularity written by Tor to a file or console log. It does not (for example) "batch up" log messages to affect times logged by a controller, times attached to syslog messages, or the mtime fields on log files.
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@ -346,7 +346,10 @@ Other options can be specified either on the command-line (--option
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**LogTimeGranularity** __NUM__::
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Set the resolution of timestamps in Tor's logs to NUM milliseconds.
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NUM must be positive and either a divisor or a multiple of 1 second.
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(Default: 1 second)
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Note that this option only controls the granularity written by Tor to
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a file or console log. Tor does not (for example) "batch up" log
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messages to affect times logged by a controller, times attached to
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syslog messages, or the mtime fields on log files. (Default: 1 second)
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**SafeLogging** **0**|**1**|**relay**::
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Tor can scrub potentially sensitive strings from log messages (e.g.
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@ -4342,15 +4342,31 @@ options_init_logs(or_options_t *options, int validate_only)
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options->RunAsDaemon;
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#endif
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if (options->LogTimeGranularity > 0 &&
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(1000 % options->LogTimeGranularity == 0 ||
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options->LogTimeGranularity % 1000 == 0)) {
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set_log_time_granularity(options->LogTimeGranularity);
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} else {
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log_warn(LD_CONFIG, "Log time granularity '%d' has to be positive "
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"and either a divisor or a multiple of 1 second.",
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if (options->LogTimeGranularity <= 0) {
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log_warn(LD_CONFIG, "Log time granularity '%d' has to be positive.",
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options->LogTimeGranularity);
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return -1;
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} else if (1000 % options->LogTimeGranularity != 0 &&
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options->LogTimeGranularity % 1000 != 0) {
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int granularity = options->LogTimeGranularity;
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if (granularity < 40) {
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do granularity++;
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while (1000 % granularity != 0);
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} else if (granularity < 1000) {
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granularity = 1000 / granularity;
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while (1000 % granularity != 0)
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granularity--;
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granularity = 1000 / granularity;
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} else {
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granularity = 1000 * ((granularity / 1000) + 1);
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}
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log_warn(LD_CONFIG, "Log time granularity '%d' has to be either a "
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"divisor or a multiple of 1 second. Changing to "
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"'%d'.",
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options->LogTimeGranularity, granularity);
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set_log_time_granularity(granularity);
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} else {
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set_log_time_granularity(options->LogTimeGranularity);
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}
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ok = 1;
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