From fbcf10c86d70cb3d4bc6f159a5165b596c9cd850 Mon Sep 17 00:00:00 2001
From: Bananymous <oskari.alaranta@bananymous.com>
Date: Tue, 3 Dec 2024 01:45:54 +0200
Subject: [PATCH] LibC: Implement closelog and make syslog print to stddbg

---
 userspace/libraries/LibC/printf_impl.cpp |  1 +
 userspace/libraries/LibC/syslog.cpp      | 26 ++++++++++++++++++++----
 2 files changed, 23 insertions(+), 4 deletions(-)

diff --git a/userspace/libraries/LibC/printf_impl.cpp b/userspace/libraries/LibC/printf_impl.cpp
index 58153ed5..cf9e8283 100644
--- a/userspace/libraries/LibC/printf_impl.cpp
+++ b/userspace/libraries/LibC/printf_impl.cpp
@@ -580,6 +580,7 @@ extern "C" int printf_impl(const char* format, va_list arguments, int (*putc_fun
 			case 'm':
 			{
 				// NOTE: this is a glibc extension
+				// NOTE: syslog() requires %m to be handled
 				if (options.alternate_form)
 					string = strerrorname_np(errno);
 				else
diff --git a/userspace/libraries/LibC/syslog.cpp b/userspace/libraries/LibC/syslog.cpp
index 696867ed..136d820c 100644
--- a/userspace/libraries/LibC/syslog.cpp
+++ b/userspace/libraries/LibC/syslog.cpp
@@ -1,12 +1,30 @@
 #include <BAN/Assert.h>
+
+#include <stdarg.h>
+#include <stdio.h>
 #include <syslog.h>
 
-void openlog(const char*, int, int)
+static const char* s_ident = nullptr;
+
+void openlog(const char* ident, int option, int facility)
 {
-	ASSERT_NOT_REACHED();
+	(void)option;
+	(void)facility;
+	s_ident = ident;
 }
 
-void syslog(int, const char*, ...)
+void syslog(int priority, const char* format, ...)
 {
-	ASSERT_NOT_REACHED();
+	(void)priority;
+	if (s_ident)
+		fprintf(stddbg, "%s", s_ident);
+	va_list args;
+	va_start(args, format);
+	vfprintf(stddbg, format, args);
+	va_end(args);
+}
+
+void closelog()
+{
+	s_ident = nullptr;
 }