Merge branch 'getsetpriority_impl' into 'master'

sys_resource: get/setpriority implementations.

See merge request redox-os/relibc!369

src/platform/linux/mod.rs

@@ -259,6 +259,10 @@ impl Pal for Sys {
         e(unsafe { syscall!(GETPPID) }) as pid_t
     }
 
+    fn getpriority(which: c_int, who: id_t) -> c_int {
+        e(unsafe { syscall!(GETPRIORITY, which, who) }) as c_int
+    }
+
     fn getrandom(buf: &mut [u8], flags: c_uint) -> ssize_t {
         e(unsafe { syscall!(GETRANDOM, buf.as_mut_ptr(), buf.len(), flags) }) as ssize_t
     }
@@ -456,6 +460,10 @@ impl Pal for Sys {
         e(unsafe { syscall!(SETPGID, pid, pgid) }) as c_int
     }
 
+    fn setpriority(which: c_int, who: id_t, prio: c_int) -> c_int {
+        e(unsafe { syscall!(SETPRIORITY, which, who, prio) }) as c_int
+    }
+
     fn setregid(rgid: gid_t, egid: gid_t) -> c_int {
         e(unsafe { syscall!(SETREGID, rgid, egid) }) as c_int
     }

src/platform/pal/mod.rs

@@ -96,6 +96,8 @@ pub trait Pal {
 
     fn getppid() -> pid_t;
 
+    fn getpriority(which: c_int, who: id_t) -> c_int;
+
     fn getrandom(buf: &mut [u8], flags: c_uint) -> ssize_t;
 
     unsafe fn getrlimit(resource: c_int, rlim: *mut rlimit) -> c_int;
@@ -165,6 +167,8 @@ pub trait Pal {
 
     fn setpgid(pid: pid_t, pgid: pid_t) -> c_int;
 
+    fn setpriority(which: c_int, who: id_t, prio: c_int) -> c_int;
+
     fn setregid(rgid: gid_t, egid: gid_t) -> c_int;
 
     fn setreuid(ruid: uid_t, euid: uid_t) -> c_int;

src/platform/redox/mod.rs

@@ -499,6 +499,12 @@ impl Pal for Sys {
         e(syscall::getppid()) as pid_t
     }
 
+    fn getpriority(which: c_int, who: id_t) -> c_int {
+        // TODO
+        unsafe { errno = ENOSYS };
+        -1
+    }
+
     fn getrandom(buf: &mut [u8], flags: c_uint) -> ssize_t {
         //TODO: make this a system call?
 
@@ -790,6 +796,12 @@ impl Pal for Sys {
         e(syscall::setpgid(pid as usize, pgid as usize)) as c_int
     }
 
+    fn setpriority(which: c_int, who: id_t, prio: c_int) -> c_int {
+        // TODO
+        unsafe { errno = ENOSYS };
+        -1
+    }
+
     fn setregid(rgid: gid_t, egid: gid_t) -> c_int {
         e(syscall::setregid(rgid as usize, egid as usize)) as c_int
     }