Add options for new log timestamp and setting timestamp format

This adds the `--new-log-timestamp` and `--new-timestamp-format <value>` options
to the `turnserver` program.

Setting `--new-log-timestamp` on the command line, or `new-log-timestamp` in the
configuration file, will cause all logs to be written with an ISI-8601 timestamp
(`YYYY-MM-DDTHH:MM:SSZZZZZ` with `T` being literal and `ZZZZZ` being `+` or `-`
and the hour and minute offset from GMT for the local timezone).  This replaces
the 'number of seconds since daemon was started' format.

Setting the `--new-timestamp-format <format>` option with a given format, or
`new-log-timestamp=<format>` in the configuration file, will use this instead
of the standard timestamp format.  Timestamp format strings up to 48 characters
can be accommodated; more will be truncated.  This will only be used when the
`--new-log-timestamp` option (above) is set.

Thanks to Hendrik Huels <[email protected]> for the idea and some of the
code for setting the log timestamp string.

Signed-off-by: Paul Wayper <[email protected]>

src/apps/relay/mainrelay.c

@@ -603,6 +603,8 @@ static char Usage[] = "Usage: turnserver [options]\n"
 " --simple-log					This flag means that no log file rollover will be used, and the log file\n"
 "						name will be constructed as-is, without PID and date appendage.\n"
 "						This option can be used, for example, together with the logrotate tool.\n"
+" --new-log-timestamp				Enable full ISO-8601 timestamp in all logs.\n"
+" --new-timestamp_format    	<format>	Set timestamp format (in strftime(1) format)\n"
 " --stale-nonce[=<value>]			Use extra security with nonce value having limited lifetime (default 600 secs).\n"
 " --max-allocate-lifetime	<value>		Set the maximum value for the allocation lifetime. Default to 3600 secs.\n"
 " --channel-lifetime		<value>		Set the lifetime for channel binding, default to 600 secs.\n"
@@ -761,6 +763,8 @@ enum EXTRA_OPTS {
 	NO_STDOUT_LOG_OPT,
 	SYSLOG_OPT,
 	SIMPLE_LOG_OPT,
+	NEW_LOG_TIMESTAMP_OPT,
+	NEW_TIMESTAMP_FORMAT_OPT,
 	AUX_SERVER_OPT,
 	UDP_SELF_BALANCE_OPT,
 	ALTERNATE_SERVER_OPT,
@@ -899,6 +903,8 @@ static const struct myoption long_options[] = {
 				{ "no-stdout-log", optional_argument, NULL, NO_STDOUT_LOG_OPT },
 				{ "syslog", optional_argument, NULL, SYSLOG_OPT },
 				{ "simple-log", optional_argument, NULL, SIMPLE_LOG_OPT },
+				{ "new-log-timestamp", optional_argument, NULL, NEW_LOG_TIMESTAMP_OPT },
+				{ "new-timestamp_format", required_argument, NULL, NEW_TIMESTAMP_FORMAT_OPT },
 				{ "aux-server", required_argument, NULL, AUX_SERVER_OPT },
 				{ "udp-self-balance", optional_argument, NULL, UDP_SELF_BALANCE_OPT },
 				{ "alternate-server", required_argument, NULL, ALTERNATE_SERVER_OPT },
@@ -1717,6 +1723,10 @@ static void read_config_file(int argc, char **argv, int pass)
 						set_log_to_syslog(get_bool_value(value));
 					} else if((pass==0) && (c==SIMPLE_LOG_OPT)) {
 						set_simple_log(get_bool_value(value));
+					} else if ((pass==0) && (c==NEW_LOG_TIMESTAMP_OPT)) {
+						use_new_log_timestamp_format=1;
+					} else if ((pass==0) && (c==NEW_TIMESTAMP_FORMAT_OPT)) {
+						set_turn_log_timestamp_format(value);
 					} else if((pass == 0) && (c != 'u')) {
 					  set_option(c, value);
 					} else if((pass > 0) && (c == 'u')) {