Add getxattr()/setxattr() variations

Author: Alexander Polakov

libc-test/build.rs

@@ -114,6 +114,7 @@ fn main() {
             cfg.header("linux/netlink.h");
         }
         cfg.header("sched.h");
+        cfg.header("attr/xattr.h");
     }
 
     if freebsd {

src/unix/notbsd/linux/mod.rs

@@ -334,6 +334,12 @@ extern {
                            len: ::off_t) -> ::c_int;
     pub fn readahead(fd: ::c_int, offset: ::off64_t,
                      count: ::size_t) -> ::ssize_t;
+    pub fn getxattr(path: *const c_char, name: *const c_char, value: *mut ::c_void, size: ::size_t) -> ::ssize_t;
+    pub fn lgetxattr(path: *const c_char, name: *const c_char, value: *mut ::c_void, size: ::size_t) -> ::ssize_t;
+    pub fn fgetxattr(filedes: ::c_int, name: *const c_char, value: *mut ::c_void, size: ::size_t) -> ::ssize_t;
+    pub fn setxattr(path: *const c_char, name: *const c_char, value: *const ::c_void, size: ::size_t, flags: ::c_int) -> ::c_int;
+    pub fn lsetxattr(path: *const c_char, name: *const c_char, value: *const ::c_void, size: ::size_t, flags: ::c_int) -> ::c_int;
+    pub fn fsetxattr(filedes: ::c_int, name: *const c_char, value: *const ::c_void, size: ::size_t, flags: ::c_int) -> ::c_int;
 }
 
 cfg_if! {