tree 0983f301c76df5ad1e839ce6cf645888ca528507
parent b4d24a36297462a24b17ed867ef35da222315cb9
author Nick Kralevich <nnk@google.com> 1581108446 -0800
committer Nick Kralevich <nnk@google.com> 1581109152 -0800

label_file.c: Fix MAC build

On Android, the label_file.c file is compiled for all platforms,
including OSX. OSX has a slightly different prototype for the
getxattr function.

ssize_t getxattr(const char *path, const char *name, void *value, size_t size, u_int32_t position, int options);

which causes a compile error when compiling libselinux on OSX.

  ```
  external/selinux/libselinux/src/label_file.c:1038:37: error: too few arguments to function call, expected 6, have 4
                                       read_digest, SHA1_HASH_SIZE);
                                                                ^
  /Applications/Xcode9.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.13.sdk/usr/include/sys/xattr.h:61:1: note: 'getxattr' declared here
  ssize_t getxattr(const char *path, const char *name, void *value, size_t size, u_int32_t position, int options);
  ^
  1 error generated.
  ```

On OSX builds, add the additional arguments so that the code compiles.

As both SELinux labels and the restorecon partial digest are stored in
extended attributes, it's theoretically possible that someone
could assign SELinux labels and hash digests on OSX filesystems.
Doing so would be extremely weird and completely untested, but
theoretically possible.

Fixes: 149060079
Test: compiles on both Linux and OSX
Change-Id: Ib80057ab09e48cc90dd37c2cc3c7046d0bdfdc9b