init: Log requested exits

apps/init.cpp

@@ -3,6 +3,7 @@
 #include <luna/PathParser.h>
 #include <luna/Sort.h>
 #include <luna/String.h>
+#include <luna/Utf8.h>
 #include <luna/Vector.h>
 #include <os/ArgumentParser.h>
 #include <os/Directory.h>
@@ -24,18 +25,6 @@ static bool g_is_system = false;
 
 FILE* g_init_log = nullptr;
 
-// Request a successful exit from the system (for tests)
-void sigterm_handler(int)
-{
-    _exit(0);
-}
-
-// Request a failure exit from the system (for tests)
-void sigquit_handler(int)
-{
-    _exit(1);
-}
-
 struct Service
 {
     String name;
@@ -63,6 +52,20 @@ static void do_log(const char* format, ...)
     va_end(ap);
 }
 
+// Request a successful exit from the system (for tests)
+void sigterm_handler(int)
+{
+    do_log("[init] successful exit requested, complying\n");
+    exit(0);
+}
+
+// Request a failure exit from the system (for tests)
+void sigquit_handler(int)
+{
+    do_log("[init] failure exit requested, complying\n");
+    exit(1);
+}
+
 static Result<void> service_child(const Service& service, SharedPtr<os::File> output, SharedPtr<os::File> error,
                                   SharedPtr<os::File> input)
 {
@@ -300,6 +303,19 @@ static Result<void> set_hostname()
     auto hostname = TRY(file->read_line());
     hostname.trim("\n");
 
+    if (hostname.is_empty())
+    {
+        do_log("[init] /etc/hostname is empty or invalid, keeping the default hostname\n");
+        return {};
+    }
+
+    Utf8StringDecoder decoder(hostname.chars());
+    if (decoder.code_points().has_error())
+    {
+        do_log("[init] /etc/hostname is not valid UTF-8, keeping the default hostname\n");
+        return {};
+    }
+
     if (sethostname(hostname.chars(), hostname.length()) < 0) return {};
 
     do_log("[init] successfully set system hostname to '%s'\n", hostname.chars());