From a6a67f71bb332611b58c127999e04a4bd2d3298a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
Date: Tue, 21 May 2019 09:53:49 +0200
Subject: [PATCH] basic/time-util: make output argument optional

---
 src/basic/time-util.c | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/src/basic/time-util.c b/src/basic/time-util.c
index daf952baa11..8ccb4a941a7 100644
--- a/src/basic/time-util.c
+++ b/src/basic/time-util.c
@@ -575,7 +575,6 @@ static int parse_timestamp_impl(const char *t, usec_t *usec, bool with_tz) {
          */
 
         assert(t);
-        assert(usec);
 
         if (t[0] == '@' && !with_tz)
                 return parse_sec(t + 1, usec);
@@ -803,8 +802,8 @@ finish:
         else
                 return -EINVAL;
 
-        *usec = ret;
-
+        if (usec)
+                *usec = ret;
         return 0;
 }
 
@@ -861,7 +860,7 @@ int parse_timestamp(const char *t, usec_t *usec) {
         if (munmap(shared, sizeof *shared) != 0)
                 return negative_errno();
 
-        if (tmp.return_value == 0)
+        if (tmp.return_value == 0 && usec)
                 *usec = tmp.usec;
 
         return tmp.return_value;
@@ -923,7 +922,6 @@ int parse_time(const char *t, usec_t *usec, usec_t default_unit) {
         bool something = false;
 
         assert(t);
-        assert(usec);
         assert(default_unit > 0);
 
         p = t;
@@ -935,7 +933,8 @@ int parse_time(const char *t, usec_t *usec, usec_t default_unit) {
                 if (*s != 0)
                         return -EINVAL;
 
-                *usec = USEC_INFINITY;
+                if (usec)
+                        *usec = USEC_INFINITY;
                 return 0;
         }
 
@@ -1007,8 +1006,8 @@ int parse_time(const char *t, usec_t *usec, usec_t default_unit) {
                 }
         }
 
-        *usec = r;
-
+        if (usec)
+                *usec = r;
         return 0;
 }