From 64f855874c32e192382df69f4765a7e32057a005 Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Tue, 20 Jun 2017 20:31:35 -0400 Subject: [PATCH] handle errors from localtime_r in ctime_r POSIX requires ctime_r return a null pointer on failure, which can occur if the input time_t value is not representable in broken down form. based on patch by Alexander Monakov. --- src/time/ctime_r.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/src/time/ctime_r.c b/src/time/ctime_r.c index d2260a16..3e24aa68 100644 --- a/src/time/ctime_r.c +++ b/src/time/ctime_r.c @@ -2,7 +2,6 @@ char *ctime_r(const time_t *t, char *buf) { - struct tm tm; - localtime_r(t, &tm); - return asctime_r(&tm, buf); + struct tm tm, *tm_p = localtime_r(t, &tm); + return tm_p ? asctime_r(tm_p, buf) : 0; } -- 2.25.1