Add setresuid/setresgid (suid/sgid stub on Redox).

src/platform/linux/mod.rs

@@ -568,12 +568,12 @@ impl Pal for Sys {
         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
+    fn setresgid(rgid: gid_t, egid: gid_t, sgid: gid_t) -> c_int {
+        e(unsafe { syscall!(SETRESGID, rgid, egid, sgid) }) as c_int
     }
 
-    fn setreuid(ruid: uid_t, euid: uid_t) -> c_int {
-        e(unsafe { syscall!(SETREUID, ruid, euid) }) as c_int
+    fn setresuid(ruid: uid_t, euid: uid_t, suid: uid_t) -> c_int {
+        e(unsafe { syscall!(SETRESUID, ruid, euid, suid) }) as c_int
     }
 
     fn setsid() -> c_int {

src/platform/pal/mod.rs

@@ -207,9 +207,9 @@ pub trait Pal {
 
     fn setpriority(which: c_int, who: id_t, prio: c_int) -> c_int;
 
-    fn setregid(rgid: gid_t, egid: gid_t) -> c_int;
+    fn setresgid(rgid: gid_t, egid: gid_t, sgid: gid_t) -> c_int;
 
-    fn setreuid(ruid: uid_t, euid: uid_t) -> c_int;
+    fn setresuid(ruid: uid_t, euid: uid_t, suid: uid_t) -> c_int;
 
     fn setsid() -> c_int;
 

src/platform/redox/mod.rs

@@ -930,11 +930,17 @@ impl Pal for Sys {
         }
     }
 
-    fn setregid(rgid: gid_t, egid: gid_t) -> c_int {
+    fn setresgid(rgid: gid_t, egid: gid_t, sgid: gid_t) -> c_int {
+        if sgid != -1 {
+            println!("TODO: suid");
+        }
         e(syscall::setregid(rgid as usize, egid as usize)) as c_int
     }
 
-    fn setreuid(ruid: uid_t, euid: uid_t) -> c_int {
+    fn setresuid(ruid: uid_t, euid: uid_t, suid: uid_t) -> c_int {
+        if suid != -1 {
+            println!("TODO: suid");
+        }
         e(syscall::setreuid(ruid as usize, euid as usize)) as c_int
     }