Auto merge of #592 - PlasmaPower:xattr-flags, r=alexcrichton

Define XATTR flags, and add XATTR functions for OSX

As found in:

http://elixir.free-electrons.com/linux/latest/source/include/uapi/linux/xattr.h

https://opensource.apple.com/source/xnu/xnu-2050.7.9/bsd/sys/xattr.h

Author: bors

libc-test/build.rs

@@ -145,6 +145,7 @@ fn main() {
         cfg.header("mach/mach_time.h");
         cfg.header("malloc/malloc.h");
         cfg.header("util.h");
+        cfg.header("sys/xattr.h");
         if target.starts_with("x86") {
             cfg.header("crt_externs.h");
         }

src/unix/bsd/apple/mod.rs

@@ -1516,6 +1516,13 @@ pub const P_ALL: idtype_t = 0;
 pub const P_PID: idtype_t = 1;
 pub const P_PGID: idtype_t = 2;
 
+pub const XATTR_NOFOLLOW: ::c_int = 0x0001;
+pub const XATTR_CREATE: ::c_int = 0x0002;
+pub const XATTR_REPLACE: ::c_int = 0x0004;
+pub const XATTR_NOSECURITY: ::c_int = 0x0008;
+pub const XATTR_NODEFAULT: ::c_int = 0x0010;
+pub const XATTR_SHOWCOMPRESSION: ::c_int = 0x0020;
+
 f! {
     pub fn WSTOPSIG(status: ::c_int) -> ::c_int {
         status >> 8
@@ -1665,6 +1672,27 @@ extern {
     pub fn getpriority(which: ::c_int, who: ::id_t) -> ::c_int;
     pub fn setpriority(which: ::c_int, who: ::id_t, prio: ::c_int) -> ::c_int;
 
+    pub fn getxattr(path: *const ::c_char, name: *const ::c_char,
+                    value: *mut ::c_void, size: ::size_t, position: u32,
+                    flags: ::c_int) -> ::ssize_t;
+    pub fn fgetxattr(filedes: ::c_int, name: *const ::c_char,
+                     value: *mut ::c_void, size: ::size_t, position: u32,
+                     flags: ::c_int) -> ::ssize_t;
+    pub fn setxattr(path: *const ::c_char, name: *const ::c_char,
+                    value: *const ::c_void, size: ::size_t, position: u32,
+                    flags: ::c_int) -> ::c_int;
+    pub fn fsetxattr(filedes: ::c_int, name: *const ::c_char,
+                     value: *const ::c_void, size: ::size_t, position: u32,
+                     flags: ::c_int) -> ::c_int;
+    pub fn listxattr(path: *const ::c_char, list: *mut ::c_char,
+                     size: ::size_t, flags: ::c_int) -> ::ssize_t;
+    pub fn flistxattr(filedes: ::c_int, list: *mut ::c_char,
+                      size: ::size_t, flags: ::c_int) -> ::ssize_t;
+    pub fn removexattr(path: *const ::c_char, name: *const ::c_char,
+                       flags: ::c_int) -> ::c_int;
+    pub fn fremovexattr(filedes: ::c_int, name: *const ::c_char,
+                        flags: ::c_int) -> ::c_int;
+
     pub fn initgroups(user: *const ::c_char, basegroup: ::c_int) -> ::c_int;
 
     #[cfg_attr(all(target_os = "macos", target_arch = "x86"),

src/unix/notbsd/linux/mod.rs

@@ -697,6 +697,9 @@ pub const PR_CAP_AMBIENT_RAISE: ::c_int = 2;
 pub const PR_CAP_AMBIENT_LOWER: ::c_int = 3;
 pub const PR_CAP_AMBIENT_CLEAR_ALL: ::c_int = 4;
 
+pub const XATTR_CREATE: ::c_int = 0x1;
+pub const XATTR_REPLACE: ::c_int = 0x2;
+
 f! {
     pub fn CPU_ZERO(cpuset: &mut cpu_set_t) -> () {
         for slot in cpuset.bits.iter_mut() {