init: Make the log stream line-buffered

Looks like log output stopped showing after buffering was implemented, since the log was not flushed properly.

apps/init.cpp

@@ -328,13 +328,15 @@ int main()
 
     umask(022);
 
-    g_init_log = fopen("/dev/uart0", "w+");
+    g_init_log = fopen("/dev/uart0", "w");
+    check(g_init_log);
+    setlinebuf(g_init_log);
     fcntl(fileno(g_init_log), F_SETFD, FD_CLOEXEC);
 
     set_hostname();
 
-    if (signal(SIGTERM, sigterm_handler) == SIG_ERR) do_log("[init] failed to register handler for SIGTERM");
-    if (signal(SIGQUIT, sigquit_handler) == SIG_ERR) do_log("[init] failed to register handler for SIGQUIT");
+    if (signal(SIGTERM, sigterm_handler) == SIG_ERR) do_log("[init] failed to register handler for SIGTERM\n");
+    if (signal(SIGQUIT, sigquit_handler) == SIG_ERR) do_log("[init] failed to register handler for SIGQUIT\n");
 
     start_services();
 

kernel/src/main.cpp

@@ -32,7 +32,7 @@ void reap_thread()
 
 [[noreturn]] void init()
 {
-    kinfoln("Starting Moon %s, built on %s at %s", MOON_VERSION, __DATE__, __TIME__);
+    kinfoln("Starting Moon %s %s", MOON_VERSION, MOON_RELEASE);
 
     // Default hostname if nobody from userspace changes it
     set_host_name("moon"_sv);

kernel/src/sys/uname.cpp

@@ -25,7 +25,6 @@ Result<u64> sys_uname(Registers*, SyscallArgs args)
     strncpy(result.nodename, s_hostname.chars(), _UTSNAME_LENGTH);
 
     strncpy(result.release, MOON_VERSION, _UTSNAME_LENGTH);
-    // FIXME: Hardcode this at build time instead of in code (should be the short commit hash).
     strncpy(result.version, MOON_RELEASE, _UTSNAME_LENGTH);
 
     strncpy(result.machine, CPU::platform_string().chars(), _UTSNAME_LENGTH);