get_owner: add dotnet and tests

Author: scivision

+stdlib/+dotnet/get_owner.m

@@ -0,0 +1,23 @@
+function o = get_owner(p)
+
+if ~stdlib.exists(p)
+  o = string.empty;
+  return
+end
+
+ntAccountType = System.Type.GetType('System.Security.Principal.NTAccount');
+if isempty(ntAccountType)
+  error('NTAccount type not found. Ensure you are running on a Windows system with .NET support.');
+end
+
+if isfolder(p)
+  fsec = System.IO.Directory.GetAccessControl(p);
+else
+  fsec = System.IO.File.GetAccessControl(p);
+end
+
+owner = fsec.GetOwner(ntAccountType);
+
+o = string(owner.Value);
+
+end

+stdlib/+java/get_owner.m

@@ -1,5 +1,10 @@
 function n = get_owner(p)
 
+if ~stdlib.exists(p)
+  n = string.empty;
+  return
+end
+
 % https://docs.oracle.com/en/java/javase/22/docs/api/java.base/java/nio/file/Files.html#getOwner(java.nio.file.Path,java.nio.file.LinkOption...)
 % https://docs.oracle.com/en/java/javase/22/docs/api/java.base/java/nio/file/LinkOption.html
 

+stdlib/+sys/get_owner.m

@@ -10,7 +10,7 @@
 
 [s, o] = system(cmd);
 if s == 0
-  o = strip(o);
+  o = string(strip(o));
 else
   o = string.empty;
 end

+stdlib/get_owner.m

@@ -10,22 +10,14 @@
   p {mustBeTextScalar}
 end
 
-n = string.empty;
-
-if ~ispc() && stdlib.has_python()
-  n = stdlib.python.get_owner(p);
-elseif stdlib.has_java()
+if stdlib.has_java()
   n = stdlib.java.get_owner(p);
-end
-
-if strempty(n)
+elseif ispc() && stdlib.has_dotnet()
+  n = stdlib.dotnet.get_owner(p);
+elseif ~ispc() && stdlib.has_python()
+  n = stdlib.python.get_owner(p);
+else
   n = stdlib.sys.get_owner(p);
 end
 
-try %#ok<*TRYNC>
-  n = string(n);
-end
-
 end
-
-%!assert(!isempty(get_owner(pwd)))

test/TestDisk.m

@@ -1,15 +1,16 @@
 classdef TestDisk < matlab.unittest.TestCase
 
 properties
-disk_fun = stdlib.has_python() || stdlib.has_dotnet() || stdlib.has_java()
 CI = getenv("CI") == "true" || getenv("GITHUB_ACTIONS") == "true"
 end
 
 properties (TestParameter)
 Ps = {".", "", "/", getenv("SystemDrive"), "not-exist"}
+Po = {mfilename("fullpath") + ".m", pwd(), ".", "", tempname()}
 device_fun = {@stdlib.device, @stdlib.sys.device, @stdlib.java.device, @stdlib.python.device}
 disk_available_fun = {@stdlib.disk_available, @stdlib.sys.disk_available, @stdlib.dotnet.disk_available, @stdlib.java.disk_available, @stdlib.python.disk_available}
 disk_capacity_fun  = {@stdlib.disk_capacity,  @stdlib.sys.disk_capacity,  @stdlib.dotnet.disk_capacity,  @stdlib.java.disk_capacity,  @stdlib.python.disk_capacity}
+owner_fun = {@stdlib.get_owner, @stdlib.sys.get_owner, @stdlib.dotnet.get_owner, @stdlib.java.get_owner, @stdlib.python.get_owner}
 end
 
 methods (Test)
@@ -82,12 +83,19 @@ function test_inode(tc)
 end
 
 
-function test_owner(tc)
+function test_owner(tc, Po, owner_fun)
+is_capable(tc, owner_fun)
 
-s = stdlib.get_owner(mfilename("fullpath") + ".m");
+s = owner_fun(Po);
 
 tc.verifyClass(s, 'string')
-tc.verifyGreaterThan(strlength(s), 0)
+
+if stdlib.exists(Po)
+  tc.verifyGreaterThan(strlength(s), 0)
+else
+  tc.verifyEmpty(s)
+end
+
 end
 
 end

test/is_capable.m

@@ -36,6 +36,10 @@ function is_capable(tc, f)
      tc.assumeTrue(has_psutil, "need Python psutil package")
    end
 
+   if endsWith(n, ["owner"])
+     tc.assumeFalse(ispc(), "unix only function")
+   end
+
 end
 
 end