Auto merge of rust-lang#604 - Uplifting:posix, r=alexcrichton

Fill in sys/sem.h as well as getitimer and setitimer

struct semun is not implemented and neither is semtimedop.

libc-test/build.rs

@@ -173,6 +173,7 @@ fn main() {
             cfg.header("sys/xattr.h");
         }
         cfg.header("sys/ipc.h");
+        cfg.header("sys/sem.h");
         cfg.header("sys/msg.h");
         cfg.header("sys/shm.h");
         cfg.header("sys/fsuid.h");

src/unix/mod.rs

@@ -124,6 +124,11 @@ s! {
         // Actually a union of an int and a void*
         pub sival_ptr: *mut ::c_void
     }
+
+    pub struct itimerval {
+        pub it_interval: ::timeval,
+        pub it_value: ::timeval,
+    }
 }
 
 pub const SIG_DFL: sighandler_t = 0 as sighandler_t;

src/unix/notbsd/linux/mod.rs

@@ -225,6 +225,12 @@ s! {
         pub msg_hdr: ::msghdr,
         pub msg_len: ::c_uint,
     }
+
+    pub struct sembuf {
+        pub sem_num: ::c_ushort,
+        pub sem_op: ::c_short,
+        pub sem_flg: ::c_short,
+    }
 }
 
 pub const ABDAY_1: ::nl_item = 0x20000;
@@ -796,6 +802,11 @@ extern {
                   cmd: ::c_int,
                   buf: *mut ::shmid_ds) -> ::c_int;
     pub fn ftok(pathname: *const ::c_char, proj_id: ::c_int) -> ::key_t;
+    pub fn semget(key: ::key_t, nsems: ::c_int, semflag: ::c_int) -> ::c_int;
+    pub fn semop(semid: ::c_int,
+                 sops: *mut ::sembuf, nsops: ::size_t) -> ::c_int;
+    pub fn semctl(semid: ::c_int,
+                  semnum: ::c_int, cmd: ::c_int, ...) -> ::c_int;
     pub fn msgctl(msqid: ::c_int, cmd: ::c_int, buf: *mut msqid_ds) -> ::c_int;
     pub fn msgget(key: ::key_t, msgflg: ::c_int) -> ::c_int;
     pub fn msgrcv(msqid: ::c_int, msgp: *mut ::c_void, msgsz: ::size_t,