The time logged is currently given as localtime without any time-zone 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. This could be removed. Old: [2019-03-04 16:15] New: [2019-03-04T16:15-05:00] Signed-off-by: Florian Wehner <[email protected]> --- lib/libalpm/log.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/lib/libalpm/log.c b/lib/libalpm/log.c index e46ad3c3..cf869a08 100644 --- a/lib/libalpm/log.c +++ b/lib/libalpm/log.c @@ -20,6 +20,7 @@ #include <stdio.h> #include <stdarg.h> +#include <stdlib.h> #include <errno.h> #include <syslog.h> @@ -37,12 +38,17 @@ static int _alpm_log_leader(FILE *f, const char *prefix) { time_t t = time(NULL); + int tz_h, tz_m; struct tm *tm = localtime(&t); + /* Calculate the timezone offset ±hh:mm */ + tz_h = tm->tm_gmtoff/3600; + tz_m = abs(tm->tm_gmtoff - (tz_h*3600))/60; + /* Use ISO-8601 date format */ - return fprintf(f, "[%04d-%02d-%02d %02d:%02d] [%s] ", + return fprintf(f, "[%04d-%02d-%02dT%02d:%02d%+03d:%02d] [%s] ", tm->tm_year + 1900, tm->tm_mon + 1, tm->tm_mday, - tm->tm_hour, tm->tm_min, prefix); + tm->tm_hour, tm->tm_min, tz_h, tz_m, prefix); } /** A printf-like function for logging. -- 2.21.0
