Reformatting log timestamp to include time-zone

The time logged is currently given as localtime without any timezone
information. This is confusing in various scenarios.

Examples:
* If one is travelling across time-zones and the timestamps in the log
appear out of order.
* Comparing dates with `datediff` gives an offset by the time-zone

This patch would reformat the time-stamp to a full ISO-8601 version.
It includes the 'T' separating date and time including seconds.

Old: [2019-03-04 16:15]
New: [2019-03-04T16:15:45-05:00]

Signed-off-by: Florian Wehner <florian@whnr.de>
Signed-off-by: Allan McRae <allan@archlinux.org>
This commit is contained in:
Florian Wehner 2019-03-07 20:14:55 -05:00 committed by Allan McRae
parent c0e9be7973
commit c61cd050f9

View file

@ -22,6 +22,7 @@
#include <stdarg.h>
#include <errno.h>
#include <syslog.h>
#include <time.h>
/* libalpm */
#include "log.h"
@ -38,11 +39,12 @@ static int _alpm_log_leader(FILE *f, const char *prefix)
{
time_t t = time(NULL);
struct tm *tm = localtime(&t);
int length = 32;
char timestamp[length];
/* Use ISO-8601 date format */
return fprintf(f, "[%04d-%02d-%02d %02d:%02d] [%s] ",
tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday,
tm->tm_hour, tm->tm_min, prefix);
strftime(timestamp,length,"%FT%X%z", tm);
return fprintf(f, "[%s] [%s] ", timestamp, prefix);
}
/** A printf-like function for logging.