util: unify implementation of NOP signal handler

This is highly complex code after all, we really should make sure to
only keep one implementation of this extremely difficult function
around.

4 files changed, 8 insertions, 6 deletions

diff --git a/src/basic/util.c b/src/basic/util.c
index c788a1d58b..f7e4aefebb 100644
--- a/src/basic/util.c
+++ b/src/basic/util.c
@@ -6916,3 +6916,7 @@ int receive_one_fd(int transport_fd, int flags) {
 
         return *(int*) CMSG_DATA(found);
 }
+
+void nop_signal_handler(int sig) {
+        /* nothing here */
+}
diff --git a/src/basic/util.h b/src/basic/util.h
index e6417b4ccd..96811f23d9 100644
--- a/src/basic/util.h
+++ b/src/basic/util.h
@@ -944,3 +944,5 @@ int fgetxattr_malloc(int fd, const char *name, char **value);
 
 int send_one_fd(int transport_fd, int fd, int flags);
 int receive_one_fd(int transport_fd, int flags);
+
+void nop_signal_handler(int sig);
diff --git a/src/core/main.c b/src/core/main.c
index dac233e84d..76abb0bde9 100644
--- a/src/core/main.c
+++ b/src/core/main.c
@@ -115,8 +115,6 @@ static bool arg_default_blockio_accounting = false;
 static bool arg_default_memory_accounting = false;
 static bool arg_default_tasks_accounting = false;
 
-static void nop_handler(int sig) {}
-
 static void pager_open_if_enabled(void) {
 
         if (arg_no_pager <= 0)
@@ -134,7 +132,7 @@ noreturn static void crash(int sig) {
                 log_emergency("Caught <%s>, not dumping core.", signal_to_string(sig));
         else {
                 struct sigaction sa = {
-                        .sa_handler = nop_handler,
+                        .sa_handler = nop_signal_handler,
                         .sa_flags = SA_NOCLDSTOP|SA_RESTART,
                 };
                 pid_t pid;
diff --git a/src/nspawn/nspawn.c b/src/nspawn/nspawn.c
index cb4e87fd74..6b5d5d5b75 100644
--- a/src/nspawn/nspawn.c
+++ b/src/nspawn/nspawn.c
@@ -2282,8 +2282,6 @@ static int wait_for_container(pid_t pid, ContainerStatus *container) {
         return r;
 }
 
-static void nop_handler(int sig) {}
-
 static int on_orderly_shutdown(sd_event_source *s, const struct signalfd_siginfo *si, void *userdata) {
         pid_t pid;
 
@@ -3241,7 +3239,7 @@ int main(int argc, char *argv[]) {
                 ContainerStatus container_status;
                 _cleanup_(barrier_destroy) Barrier barrier = BARRIER_NULL;
                 static const struct sigaction sa = {
-                        .sa_handler = nop_handler,
+                        .sa_handler = nop_signal_handler,
                         .sa_flags = SA_NOCLDSTOP,
                 };
                 int ifi = 0;