Add umask

src/platform/linux/mod.rs

@@ -61,10 +61,6 @@ impl Sys {
     //     unsafe { syscall!(TIMES, out) as clock_t }
     // }
 
-    fn umask(mask: mode_t) -> mode_t {
-        unsafe { syscall!(UMASK, mask) as mode_t }
-    }
-
     pub fn uname(utsname: *mut utsname) -> c_int {
         e(unsafe { syscall!(UNAME, utsname, 0) }) as c_int
     }
@@ -386,6 +382,10 @@ impl Pal for Sys {
         Self::ioctl(fd, TCSETS + act as c_ulong, value as *mut c_void)
     }
 
+    fn umask(mask: mode_t) -> mode_t {
+        unsafe { syscall!(UMASK, mask) as mode_t }
+    }
+
     fn unlink(path: &CStr) -> c_int {
         e(unsafe { syscall!(UNLINKAT, AT_FDCWD, path.as_ptr(), 0) }) as c_int
     }

src/platform/pal/mod.rs

@@ -137,6 +137,8 @@ pub trait Pal {
 
     fn tcsetattr(fd: c_int, act: c_int, value: *const termios) -> c_int;
 
+    fn umask(mask: mode_t) -> mode_t;
+
     fn unlink(path: &CStr) -> c_int;
 
     fn waitpid(pid: pid_t, stat_loc: *mut c_int, options: c_int) -> pid_t;

src/platform/redox/mod.rs

@@ -899,6 +899,10 @@ impl Pal for Sys {
         0
     }
 
+    fn umask(mask: mode_t) -> mode_t {
+        e(syscall::umask(mask as usize)) as mode_t
+    }
+
     fn unlink(path: &CStr) -> c_int {
         e(syscall::unlink(path.to_bytes())) as c_int
     }