Handle possible clock_gettime() errors in curms().

Use curms() instead of new clock_gettime() call points, too.

src/arp.c

@@ -491,22 +491,13 @@ int arp_gw_query_timeout(struct client_state_t cs[static 1], long long nowts)
 __attribute__((noreturn))
 static void quit_after_lease_handler(struct client_state_t cs[static 1])
 {
-    struct timespec res;
+    long long init_ts = curms();
-    if (clock_gettime(CLOCK_MONOTONIC, &res) < 0) {
-        suicide("%s: (%s) clock_gettime failed: %s",
-                client_config.interface, __func__, strerror(errno));
-    }
-    time_t init_ts = res.tv_sec;
     for (;;) {
         if (arp_announcement(cs) >= 0)
             exit(EXIT_SUCCESS);
         log_warning("%s: (%s) Failed to send ARP announcement: %s",
                     client_config.interface, __func__, strerror(errno));
-        if (clock_gettime(CLOCK_MONOTONIC, &res) < 0) {
+        if (curms() - init_ts > (60LL * 1000LL)) break;
-            suicide("%s: (%s) clock_gettime failed: %s",
-                    client_config.interface, __func__, strerror(errno));
-        }
-        if (res.tv_sec - init_ts > 60) break;
     }
     exit(EXIT_FAILURE);
 }

src/sys.c

@@ -38,6 +38,16 @@
 #include "ndhc.h"
 #include "sys.h"
 
+long long IMPL_curms(const char *parent_function)
+{
+    struct timespec ts;
+    if (clock_gettime(CLOCK_MONOTONIC, &ts) < 0) {
+        suicide("%s: (%s) clock_gettime failed: %s",
+                client_config.interface, parent_function, strerror(errno));
+    }
+    return ts.tv_sec * 1000LL + ts.tv_nsec / 1000000LL;
+}
+
 void epoll_add(int epfd, int fd)
 {
     struct epoll_event ev;

src/sys.h

@@ -31,18 +31,13 @@
 #include <time.h>
 #include "ndhc-defines.h"
 
-static inline long long curms()
-{
-    struct timespec ts;
-    clock_gettime(CLOCK_MONOTONIC, &ts);
-    return ts.tv_sec * 1000LL + ts.tv_nsec / 1000000LL;
-}
-
 static inline size_t min_size_t(size_t a, size_t b)
 {
     return a < b ? a : b;
 }
 
+#define curms() IMPL_curms(__func__)
+long long IMPL_curms(const char *parent_function);
 void epoll_add(int epfd, int fd);
 void epoll_del(int epfd, int fd);