Kernel/LibC: Implement readlink in terms of readlinkat

userspace/libraries/LibC/include/sys/syscall.h

@@ -55,7 +55,6 @@ __BEGIN_DECLS
 	O(SYS_FCHMOD,			fchmod)			\
 	O(SYS_CREATE_DIR,		create_dir)		\
 	O(SYS_UNLINK,			unlink) 		\
-	O(SYS_READLINK,			readlink)		\
 	O(SYS_READLINKAT,		readlinkat)		\
 	O(SYS_MSYNC,			msync)			\
 	O(SYS_PREAD,			pread)			\

userspace/libraries/LibC/unistd.cpp

@@ -3,6 +3,7 @@
 #include <kernel/Syscall.h>
 
 #include <errno.h>
+#include <fcntl.h>
 #include <pwd.h>
 #include <stdarg.h>
 #include <stdio.h>
@@ -86,7 +87,7 @@ ssize_t write(int fildes, const void* buf, size_t nbyte)
 
 ssize_t readlink(const char* __restrict path, char* __restrict buf, size_t bufsize)
 {
-	return syscall(SYS_READLINK, path, buf, bufsize);
+	return readlinkat(AT_FDCWD, path, buf, bufsize);
 }
 
 ssize_t readlinkat(int fd, const char* __restrict path, char* __restrict buf, size_t bufsize)