device, inode, ram, disk: return empty on failure as sentinel

Author: scivision

+stdlib/+dotnet/disk_available.m

@@ -2,7 +2,7 @@
 
 function f = disk_available(p)
 
-f = uint64(0);
+f = uint64([]);
 
 if ~stdlib.exists(p), return, end
 

+stdlib/+dotnet/disk_capacity.m

@@ -2,7 +2,7 @@
 
 function f = disk_capacity(d)
 
-f = uint64(0);
+f = uint64([]);
 
 if ~stdlib.exists(d), return, end
 

+stdlib/+java/device.m

@@ -1,15 +1,16 @@
 function i = device(file)
 
+i = uint64([]);
+if ~stdlib.exists(file), return, end
+
 opt = java.nio.file.LinkOption.values();
 
 jp = javaPathObject(stdlib.absolute(file));
 % Java 1.8 benefits from the absolute() for stability
 % seen on older Matlab versions on HPC
 
-try
+try %#ok<TRYNC>
   i = java.nio.file.Files.getAttribute(jp, 'unix:dev', opt);
-catch
-  i = [];
 end
 
 i = uint64(i);

+stdlib/+java/disk_available.m

@@ -1,6 +1,9 @@
 function i = disk_available(file)
 
 i = java.io.File(file).getUsableSpace();
+if i < 1
+  i = [];
+end
 
 i = uint64(i);
 end

+stdlib/+java/disk_capacity.m

@@ -1,5 +1,9 @@
-function f = disk_capacity(d)
+function i = disk_capacity(d)
 
-f = uint64(java.io.File(d).getTotalSpace());
+i = java.io.File(d).getTotalSpace();
+if i < 1
+  i = [];
+end
 
+i = uint64(i);
 end

+stdlib/+java/inode.m

@@ -1,15 +1,16 @@
 function i = inode(file)
 
+i = uint64([]);
+if ~stdlib.exists(file), return, end
+
 opt = java.nio.file.LinkOption.values();
 
 jp = javaPathObject(stdlib.absolute(file));
 % Java 1.8 benefits from the absolute() for stability--it's not an issue
 % on every computer.
 
-try
+try %#ok<TRYNC>
   i = java.nio.file.Files.getAttribute(jp, "unix:ino", opt);
-catch
-  i = [];
 end
 
 i = uint64(i);

+stdlib/+python/device.m

@@ -1,14 +1,13 @@
 function i = device(file)
 
-i = 0;
-
 try
   i = int64(py.os.stat(file).st_dev);
   % int64 first is for Matlab <= R2022a
 catch e
   if ~contains(e.message, "FileNotFoundError")
     warning(e.identifier, "device(%s) failed: %s", file, e.message)
   end
+  i = [];
 end
 
 i = uint64(i);

+stdlib/+python/inode.m

@@ -1,14 +1,13 @@
 function i = inode(p)
 
-i = 0;
-
 try
   i = int64(py.os.stat(p).st_ino);
   % int64 first is for Matlab <= R2022a
 catch e
   if ~contains(e.message, "FileNotFoundError")
     warning(e.identifier, "inode(%s) failed: %s", p, e.message)
   end
+  i = [];
 end
 
 i = uint64(i);

+stdlib/+python/is_mount.m

@@ -4,6 +4,9 @@
 
 function y = is_mount(filepath)
 
+y = logical.empty;
+if ~stdlib.exists(filepath), return, end
+
 % some Python on CI needs this. Didn't replicate on local Windows PC.
 if ispc() && strcmp(filepath, stdlib.root_name(filepath)) && ~endsWith(filepath, ["/", "\"])
   y = false;
@@ -12,9 +15,6 @@
 
 try
   y = py.os.path.ismount(filepath);
-catch e
-  warning(e.identifier, "Python is_mount failed: %s", e.message);
-  y = false;
 end
 
 end

+stdlib/+python/private/disk_usage.m

@@ -7,12 +7,12 @@
     case 'free', i = u.free;
     otherwise, error('stdlib:python:disk_usage:valueError', 'unknown disk_usage property %s', v)
   end
- 
+
   i = int64(i);
   % int64 first is for Matlab <= R2022a
 catch
-  i = 0;
+  i = [];
 end
 
 i = uint64(i);
-end
+end