Kernel/LibC: Implement {,f}statvfs

userspace/libraries/LibC/CMakeLists.txt

@@ -32,6 +32,7 @@ set(LIBC_SOURCES
 	sys/select.cpp
 	sys/socket.cpp
 	sys/stat.cpp
+	sys/statvfs.cpp
 	sys/time.cpp
 	sys/utsname.cpp
 	sys/wait.cpp

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

@@ -48,6 +48,7 @@ __BEGIN_DECLS
 	O(SYS_FCNTL,			fcntl)			\
 	O(SYS_NANOSLEEP,		nanosleep)		\
 	O(SYS_FSTATAT,			fstatat)		\
+	O(SYS_FSTATVFSAT,		fstatvfsat)		\
 	O(SYS_SYNC,				sync)			\
 	O(SYS_MMAP,				mmap)			\
 	O(SYS_MUNMAP,			munmap) 		\

userspace/libraries/LibC/sys/statvfs.cpp

@@ -0,0 +1,18 @@
+#include <fcntl.h>
+#include <sys/statvfs.h>
+#include <sys/syscall.h>
+
+static int fstatvfsat(int fildes, const char* path, struct statvfs* buf)
+{
+	return syscall(SYS_FSTATVFSAT, fildes, path, buf);
+}
+
+int fstatvfs(int fildes, struct statvfs* buf)
+{
+	return fstatvfsat(fildes, nullptr, buf);
+}
+
+int statvfs(const char* __restrict path, struct statvfs* __restrict buf)
+{
+	return fstatvfsat(AT_FDCWD, path, buf);
+}