log: never close file descriptors < 3

src/log.c

@@ -50,8 +50,10 @@ void log_close_console(void) {
         if (console_fd < 0)
                 return;
 
-        if (getpid() == 1 || console_fd != STDERR_FILENO) {
-                close_nointr_nofail(console_fd);
+        if (getpid() == 1) {
+                if (console_fd >= 3)
+                        close_nointr_nofail(console_fd);
+
                 console_fd = -1;
         }
 }

src/main.c

@@ -175,7 +175,7 @@ static void install_crash_handler(void) {
 static int make_null_stdio(void) {
         int null_fd, r;
 
-        if ((null_fd = open("/dev/null", O_RDWR)) < 0) {
+        if ((null_fd = open("/dev/null", O_RDWR|O_NOCTTY)) < 0) {
                 log_error("Failed to open /dev/null: %m");
                 return -errno;
         }