diff options
Diffstat (limited to 'ext/clogger_ext/clogger.c')
| -rw-r--r-- | ext/clogger_ext/clogger.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/ext/clogger_ext/clogger.c b/ext/clogger_ext/clogger.c index 7989472..23aea39 100644 --- a/ext/clogger_ext/clogger.c +++ b/ext/clogger_ext/clogger.c @@ -475,9 +475,21 @@ static void append_request_length(struct clogger *c) } } +/* + * time(2) may slip backwards, so use CLOCK_REALTIME for accuracy + * https://lore.kernel.org/git/20230319064353.686226-3-eggert@cs.ucla.edu/T/ + */ +static time_t cur_time(void) +{ + struct timespec now; + + (void)clock_gettime(CLOCK_REALTIME, &now); + return now.tv_sec; +} + static long local_gmtoffset(struct tm *tm) { - time_t t = time(NULL); + time_t t = cur_time(); tzset(); localtime_r(&t, tm); @@ -537,7 +549,7 @@ static void append_time_utc(struct clogger *c) char buf[sizeof("01/Jan/1970:00:00:00 +0000")]; struct tm tm; int nr; - time_t t = time(NULL); + time_t t = cur_time(); gmtime_r(&t, &tm); nr = snprintf(buf, sizeof(buf), @@ -556,7 +568,7 @@ append_time(struct clogger *c, enum clogger_opcode op, VALUE fmt, VALUE buf) size_t buf_size = RSTRING_LEN(buf) + 1; /* "\0" */ size_t nr; struct tm tmp; - time_t t = time(NULL); + time_t t = cur_time(); if (op == CL_OP_TIME_LOCAL) localtime_r(&t, &tmp); |