commit b1c9fda74be24a69443f45d4470cbe14f69fe860
author Derrick Lyndon Pallas <derrick@pallas.us> Tue Apr 21 17:01:27 2020 -0700
committer Derrick Lyndon Pallas <derrick@pallas.us> Tue Apr 21 17:19:24 2020 -0700
tree dd7e3ea66cf057947325c533da1830009e95bac1
parent fbee194fd9cc25e7438e73896ba81020ef1dd266

time64/ctime64_r: localtime64_r can fail

In ctime64_r, the call to localtime64_r can fail.  If we don't check for
this and then call asctime64_r, the results are garbage.

Signed-off-by: Derrick Lyndon Pallas <derrick@pallas.us>

src/time64.c

diff --git a/src/time64.c b/src/time64.c
index 8c08caf..2ed8562 100644
--- a/src/time64.c
+++ b/src/time64.c
@@ -806,7 +806,9 @@
 char *ctime64_r( const Time64_T* time, char* result ) {
     struct TM date;
 
-    localtime64_r( time, &date );
+    if (!localtime64_r( time, &date ))
+        return NULL;
+
     return asctime64_r( &date, result );
 }