Add shutdown, listen, and getpagesize

src/platform/linux/mod.rs

@@ -239,6 +239,10 @@ impl Pal for Sys {
         e(unsafe { syscall!(GETGID) }) as gid_t
     }
 
+    fn getpagesize() -> c_int {
+        e(unsafe { syscall!(GETPAGESIZE) }) as c_int
+    }
+
     fn getpgid(pid: pid_t) -> pid_t {
         e(unsafe { syscall!(GETPGID, pid) }) as pid_t
     }

src/platform/linux/socket.rs

@@ -4,14 +4,6 @@ use super::{e, Sys};
 use header::sys_socket::{sockaddr, socklen_t};
 
 impl Sys {
-    fn listen(socket: c_int, backlog: c_int) -> c_int {
-        e(unsafe { syscall!(LISTEN, socket, backlog) }) as c_int
-    }
-
-    fn shutdown(socket: c_int, how: c_int) -> c_int {
-        e(unsafe { syscall!(SHUTDOWN, socket, how) }) as c_int
-    }
-
     fn socketpair(domain: c_int, kind: c_int, protocol: c_int, socket_vector: *mut c_int) -> c_int {
         e(unsafe { syscall!(SOCKETPAIR, domain, kind, protocol, socket_vector) }) as c_int
     }
@@ -65,6 +57,10 @@ impl PalSocket for Sys {
         }) as c_int
     }
 
+    fn listen(socket: c_int, backlog: c_int) -> c_int {
+        e(unsafe { syscall!(LISTEN, socket, backlog) }) as c_int
+    }
+
     unsafe fn recvfrom(
         socket: c_int,
         buf: *mut c_void,
@@ -116,6 +112,10 @@ impl PalSocket for Sys {
         }) as c_int
     }
 
+    fn shutdown(socket: c_int, how: c_int) -> c_int {
+        e(unsafe { syscall!(SHUTDOWN, socket, how) }) as c_int
+    }
+
     unsafe fn socket(domain: c_int, kind: c_int, protocol: c_int) -> c_int {
         e(syscall!(SOCKET, domain, kind, protocol)) as c_int
     }