timesyncd: lookup name server via sd-resolve, support IPv6, react to …

…SIGINT/SITERM

Makefile.am

@@ -4023,6 +4023,7 @@ systemd_timesyncd_LDADD = \
 	libsystemd-label.la \
 	libsystemd-internal.la \
 	libsystemd-shared.la \
+	libsystemd-resolve.la \
 	-lm
 
 rootlibexec_PROGRAMS += \

src/shared/util.c

@@ -2016,7 +2016,6 @@ int ignore_signals(int sig, ...) {
         va_list ap;
         int r = 0;
 
-
         if (sigaction(sig, &sa, NULL) < 0)
                 r = -errno;
 
@@ -2442,6 +2441,24 @@ void sigset_add_many(sigset_t *ss, ...) {
         va_end(ap);
 }
 
+int sigprocmask_many(int how, ...) {
+        va_list ap;
+        sigset_t ss;
+        int sig;
+
+        assert_se(sigemptyset(&ss) == 0);
+
+        va_start(ap, how);
+        while ((sig = va_arg(ap, int)) > 0)
+                assert_se(sigaddset(&ss, sig) == 0);
+        va_end(ap);
+
+        if (sigprocmask(how, &ss, NULL) < 0)
+                return -errno;
+
+        return 0;
+}
+
 char* gethostname_malloc(void) {
         struct utsname u;
 

src/shared/util.h

@@ -393,6 +393,7 @@ char* dirname_malloc(const char *path);
 void rename_process(const char name[8]);
 
 void sigset_add_many(sigset_t *ss, ...);
+int sigprocmask_many(int how, ...);
 
 bool hostname_is_set(void);