Add missing syscall numbers and wrapper

src/call.rs

@@ -101,6 +101,18 @@ pub fn fstat(fd: usize, stat: &mut Stat) -> Result<usize> {
     }
 }
 
+/// Get filesystem metadata about a file descriptor
+pub fn fstatvfs(fd: usize, stat: &mut Stat) -> Result<usize> {
+    unsafe {
+        syscall3(
+            SYS_FSTATVFS,
+            fd,
+            stat as *mut Stat as usize,
+            mem::size_of::<Stat>(),
+        )
+    }
+}
+
 /// Sync a file descriptor to its underlying medium
 pub fn fsync(fd: usize) -> Result<usize> {
     unsafe { syscall1(SYS_FSYNC, fd) }

src/number.rs

@@ -37,6 +37,11 @@ pub const SYS_LSEEK: usize = SYS_CLASS_FILE | 19;
 pub const SYS_FCHOWN: usize = SYS_CLASS_FILE | 207;
 pub const SYS_FCNTL: usize = SYS_CLASS_FILE | 55;
 pub const SYS_FEVENT: usize = SYS_CLASS_FILE | 927;
+pub const SYS_GETDENTS: usize = SYS_CLASS_FILE | 0x1B2;
+pub const SYS_FTRUNCATE: usize = SYS_CLASS_FILE | 0x1B3;
+pub const SYS_FUTIMENS: usize = SYS_CLASS_FILE | 0x1B4;
+pub const SYS_FSTATVFS: usize = SYS_CLASS_FILE | 0x1B5;
+pub const SYS_MKNS: usize = SYS_CLASS_FILE | 0x1B6;
 
 // SYS_CALL, fd, inout buf ptr, inout buf len, flags, metadata buf ptr, metadata buf len
 // TODO: new number for SYS_CALL where flags are sent as 6th argument (using syscall6)