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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.
This commit is contained in:
Karsten Loesing 2010-11-08 16:37:20 +01:00
parent 8c5ba9388b
commit ed45bc198f
2 changed files with 27 additions and 8 deletions
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5
doc/tor.1.txt
View File

@ -346,7 +346,10 @@ Other options can be specified either on the command-line (--option
**LogTimeGranularity** __NUM__::
Set the resolution of timestamps in Tor's logs to NUM milliseconds.
NUM must be positive and either a divisor or a multiple of 1 second.
(Default: 1 second)
Note that this option only controls the granularity written by Tor to
a file or console log. Tor 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. (Default: 1 second)
**SafeLogging** **0**|**1**|**relay**::
Tor can scrub potentially sensitive strings from log messages (e.g.

30
src/or/config.c
View File

@ -4342,15 +4342,31 @@ options_init_logs(or_options_t *options, int validate_only)
options->RunAsDaemon;
#endif
if (options->LogTimeGranularity > 0 &&
(1000 % options->LogTimeGranularity == 0 ||
options->LogTimeGranularity % 1000 == 0)) {
set_log_time_granularity(options->LogTimeGranularity);
} else {
log_warn(LD_CONFIG, "Log time granularity '%d' has to be positive "
"and either a divisor or a multiple of 1 second.",
if (options->LogTimeGranularity <= 0) {
log_warn(LD_CONFIG, "Log time granularity '%d' has to be positive.",
options->LogTimeGranularity);
return -1;
} else if (1000 % options->LogTimeGranularity != 0 &&
options->LogTimeGranularity % 1000 != 0) {
int granularity = options->LogTimeGranularity;
if (granularity < 40) {
do granularity++;
while (1000 % granularity != 0);
} else if (granularity < 1000) {
granularity = 1000 / granularity;
while (1000 % granularity != 0)
granularity--;
granularity = 1000 / granularity;
} else {
granularity = 1000 * ((granularity / 1000) + 1);
}
log_warn(LD_CONFIG, "Log time granularity '%d' has to be either a "
"divisor or a multiple of 1 second. Changing to "
"'%d'.",
options->LogTimeGranularity, granularity);
set_log_time_granularity(granularity);
} else {
set_log_time_granularity(options->LogTimeGranularity);
}
ok = 1;