Add ucred-like structs for FreeBSDs and NetBSD

Author: Bryant Mairs

src/dox.rs

@@ -146,5 +146,6 @@ mod imp {
 
     pub mod mem {
         pub fn size_of_val<T>(_: &T) -> usize { 4 }
+        pub fn size_of<T>(_: &T) -> usize { 4 }
     }
 }

src/unix/bsd/freebsdlike/mod.rs

@@ -159,6 +159,15 @@ s! {
         pub int_p_sign_posn: ::c_char,
         pub int_n_sign_posn: ::c_char,
     }
+
+    pub struct cmsgcred {
+        pub cmcred_pid: ::pid_t,
+        pub cmcred_uid: ::uid_t,
+        pub cmcred_euid: ::uid_t,
+        pub cmcred_gid: ::gid_t,
+        pub cmcred_ngroups: ::c_short,
+        pub cmcred_groups: [::gid_t; CMGROUP_MAX],
+    }
 }
 
 pub const AIO_LISTIO_MAX: ::c_int = 16;
@@ -934,6 +943,8 @@ pub const OCRNL: ::tcflag_t = 0x10;
 pub const ONOCR: ::tcflag_t = 0x20;
 pub const ONLRET: ::tcflag_t = 0x40;
 
+pub const CMGROUP_MAX: usize = 16;
+
 f! {
     pub fn WIFCONTINUED(status: ::c_int) -> bool {
         status == 0x13

src/unix/bsd/netbsdlike/netbsd/mod.rs

@@ -1,3 +1,5 @@
+use dox::mem;
+
 pub type clock_t = ::c_uint;
 pub type suseconds_t = ::c_int;
 pub type dev_t = u64;
@@ -281,6 +283,16 @@ s! {
         pub ifm_index: ::c_ushort,
         pub ifm_data: if_data,
     }
+
+    pub struct sockcred {
+        pub sc_pid: ::pid_t,
+        pub sc_uid: ::uid_t,
+        pub sc_euid: ::uid_t,
+        pub sc_gid: ::gid_t,
+        pub sc_egid: ::gid_t,
+        pub sc_ngroups: ::c_int,
+        pub sc_groups: [::gid_t; 1],
+    }
 }
 
 pub const AT_FDCWD: ::c_int = -100;
@@ -916,6 +928,15 @@ f! {
     pub fn WIFCONTINUED(status: ::c_int) -> bool {
         status == 0xffff
     }
+
+    pub fn SOCKCREDSIZE(ngrps: usize) -> usize {
+        let ngrps = if ngrps > 0 {
+            ngrps - 1
+        } else {
+            0
+        };
+        mem::size_of::<sockcred>() + mem::size_of::<::gid_t>() * ngrps
+    }
 }
 
 extern {