journal-remote: Use sd_event_set_signal_exit()

This also fixes bugs in the previous code where we pass the server
object as userdata to sd_event_add_signal which means that sd-event
tries to use the value of the server pointer as its exit code when
a signal is triggered.

(cherry picked from commit dcd332a)
(cherry picked from commit 247627c)
(cherry picked from commit 233b373)

src/journal-remote/journal-remote-main.c

@@ -564,24 +564,6 @@ static int dispatch_http_event(sd_event_source *event,
  **********************************************************************
  **********************************************************************/
 
-static int setup_signals(RemoteServer *s) {
-        int r;
-
-        assert(s);
-
-        assert_se(sigprocmask_many(SIG_SETMASK, NULL, SIGINT, SIGTERM, -1) >= 0);
-
-        r = sd_event_add_signal(s->events, &s->sigterm_event, SIGTERM, NULL, s);
-        if (r < 0)
-                return r;
-
-        r = sd_event_add_signal(s->events, &s->sigint_event, SIGINT, NULL, s);
-        if (r < 0)
-                return r;
-
-        return 0;
-}
-
 static int setup_raw_socket(RemoteServer *s, const char *address) {
         int fd;
 
@@ -609,9 +591,9 @@ static int create_remoteserver(
         if (r < 0)
                 return r;
 
-        r = setup_signals(s);
+        r = sd_event_set_signal_exit(s->events, true);
         if (r < 0)
-                return log_error_errno(r, "Failed to set up signals: %m");
+                return log_error_errno(r, "Failed to install SIGINT/SIGTERM handlers: %m");
 
         n = sd_listen_fds(true);
         if (n < 0)

src/journal-remote/journal-remote.c

@@ -362,8 +362,6 @@ void journal_remote_server_destroy(RemoteServer *s) {
         writer_unref(s->_single_writer);
         hashmap_free(s->writers);
 
-        sd_event_source_unref(s->sigterm_event);
-        sd_event_source_unref(s->sigint_event);
         sd_event_source_unref(s->listen_event);
         sd_event_unref(s->events);
 

src/journal-remote/journal-remote.h

@@ -27,7 +27,7 @@ struct RemoteServer {
         size_t active;
 
         sd_event *events;
-        sd_event_source *sigterm_event, *sigint_event, *listen_event;
+        sd_event_source *listen_event;
 
         Hashmap *writers;
         Writer *_single_writer;

src/journal-remote/journal-upload.c

@@ -379,38 +379,6 @@ static int open_file_for_upload(Uploader *u, const char *filename) {
         return r;
 }
 
-static int dispatch_sigterm(sd_event_source *event,
-                            const struct signalfd_siginfo *si,
-                            void *userdata) {
-        Uploader *u = ASSERT_PTR(userdata);
-
-        log_received_signal(LOG_INFO, si);
-
-        close_fd_input(u);
-        close_journal_input(u);
-
-        sd_event_exit(u->events, 0);
-        return 0;
-}
-
-static int setup_signals(Uploader *u) {
-        int r;
-
-        assert(u);
-
-        assert_se(sigprocmask_many(SIG_SETMASK, NULL, SIGINT, SIGTERM, -1) >= 0);
-
-        r = sd_event_add_signal(u->events, &u->sigterm_event, SIGTERM, dispatch_sigterm, u);
-        if (r < 0)
-                return r;
-
-        r = sd_event_add_signal(u->events, &u->sigint_event, SIGINT, dispatch_sigterm, u);
-        if (r < 0)
-                return r;
-
-        return 0;
-}
-
 static int setup_uploader(Uploader *u, const char *url, const char *state_file) {
         int r;
         const char *host, *proto = "";
@@ -450,9 +418,9 @@ static int setup_uploader(Uploader *u, const char *url, const char *state_file)
         if (r < 0)
                 return log_error_errno(r, "sd_event_default failed: %m");
 
-        r = setup_signals(u);
+        r = sd_event_set_signal_exit(u->events, true);
         if (r < 0)
-                return log_error_errno(r, "Failed to set up signals: %m");
+                return log_error_errno(r, "Failed to install SIGINT/SIGTERM handlers: %m");
 
         (void) sd_watchdog_enabled(false, &u->watchdog_usec);
 
@@ -476,8 +444,6 @@ static void destroy_uploader(Uploader *u) {
         close_fd_input(u);
         close_journal_input(u);
 
-        sd_event_source_unref(u->sigterm_event);
-        sd_event_source_unref(u->sigint_event);
         sd_event_unref(u->events);
 }
 

src/journal-remote/journal-upload.h

@@ -25,7 +25,6 @@ typedef enum {
 
 typedef struct Uploader {
         sd_event *events;
-        sd_event_source *sigint_event, *sigterm_event;
 
         char *url;
         CURL *easy;