getting freespace returns null instead of blowing up.

NzbDrone.Api/RootFolders/RootFolderResource.cs

@@ -8,7 +8,7 @@ namespace NzbDrone.Api.RootFolders
     public class RootFolderResource : RestResource
     {
         public String Path { get; set; }
-        public Int64 FreeSpace { get; set; }
+        public Int64? FreeSpace { get; set; }
 
         public List<UnmappedFolder> UnmappedFolders { get; set; }
     }

NzbDrone.Common.Test/DiskProviderTests/IsParentFixture.cs

@@ -1,8 +1,4 @@
-using System;
+using System.IO;
-using System.Collections.Generic;
-using System.IO;
-using System.Linq;
-using System.Text;
 using FluentAssertions;
 using NUnit.Framework;
 using NzbDrone.Test.Common;
@@ -17,7 +13,7 @@ namespace NzbDrone.Common.Test.DiskProviderTests
         {
             var path = @"C:\".AsOsAgnostic();
 
-            Subject.GetAvilableSpace(path).Should().NotBe(0);
+            Subject.GetAvailableSpace(path).Should().NotBe(0);
         }
 
         [Test]
@@ -25,7 +21,7 @@ namespace NzbDrone.Common.Test.DiskProviderTests
         {
             var path = @"C:\".AsOsAgnostic();
 
-            Subject.GetAvilableSpace(Path.Combine(path, "invalidFolder")).Should().NotBe(0);
+            Subject.GetAvailableSpace(Path.Combine(path, "invalidFolder")).Should().NotBe(0);
         }
 
 
@@ -34,7 +30,15 @@ namespace NzbDrone.Common.Test.DiskProviderTests
         {
             WindowsOnly();
 
-            Assert.Throws<DirectoryNotFoundException>(() => Subject.GetAvilableSpace("J:\\").Should().NotBe(0));
+            Assert.Throws<DirectoryNotFoundException>(() => Subject.GetAvailableSpace("J:\\").Should().NotBe(0));
+        }
+
+        [Test]
+        public void should_return_null_when_cant_get_free_space()
+        {
+            LinuxOnly();
+
+           Subject.GetAvailableSpace("/run/").Should().NotBe(null);
         }
     }
 }

NzbDrone.Common/DiskProvider.cs

@@ -17,7 +17,6 @@ namespace NzbDrone.Common
         DateTime GetLastFolderWrite(string path);
         DateTime GetLastFileWrite(string path);
         void EnsureFolder(string path);
-        bool FolderExists(string path, bool caseSensitive);
         bool FolderExists(string path);
         bool FileExists(string path);
         bool FileExists(string path, bool caseSensitive);
@@ -32,7 +31,7 @@ namespace NzbDrone.Common
         void MoveFile(string source, string destination);
         void DeleteFolder(string path, bool recursive);
         void InheritFolderPermissions(string filename);
-        long GetAvilableSpace(string path);
+        long? GetAvailableSpace(string path);
         string ReadAllText(string filePath);
         void WriteAllText(string filename, string contents);
         void FileSetLastWriteTimeUtc(string path, DateTime dateTime);
@@ -113,16 +112,6 @@ namespace NzbDrone.Common
             return Directory.Exists(path);
         }
 
-        public bool FolderExists(string path, bool caseSensitive)
-        {
-            if (caseSensitive)
-            {
-                return FolderExists(path) && path == path.GetActualCasing();
-            }
-
-            return FolderExists(path);
-        }
-
         public bool FileExists(string path)
         {
             Ensure.That(() => path).IsValidPath();
@@ -289,26 +278,37 @@ namespace NzbDrone.Common
             File.SetAccessControl(filename, fs);
         }
 
-        public long GetAvilableSpace(string path)
+        public long? GetAvailableSpace(string path)
         {
             Ensure.That(() => path).IsValidPath();
 
+            var root = GetPathRoot(path);
+
+            if (!FolderExists(root))
+                throw new DirectoryNotFoundException(root);
+
             if (OsInfo.IsLinux)
             {
-                var driveInfo = DriveInfo.GetDrives().SingleOrDefault(c => c.IsReady && path.StartsWith(c.Name, StringComparison.CurrentCultureIgnoreCase));
+                var drives = DriveInfo.GetDrives();
 
-                if (driveInfo == null)
+                foreach (var drive in drives)
                 {
-                    throw new DirectoryNotFoundException(path);
+                    try
+                    {
+                        if (drive.IsReady && path.StartsWith(drive.Name, StringComparison.CurrentCultureIgnoreCase))
+                        {
+                            return drive.AvailableFreeSpace;
+                        }
+                    }
+                    catch (InvalidOperationException e)
+                    {
+                        Logger.ErrorException("Couldn't get free space for " + path, e);
                     }
-
-                return driveInfo.AvailableFreeSpace;
                 }
 
-            var root = GetPathRoot(path);
+                return null;
+            }
 
-            if (!FolderExists(root))
-                throw new DirectoryNotFoundException(root);
 
             return DriveFreeSpaceEx(root);
         }

NzbDrone.Core.Test/MediaFileTests/EpisodeImportTests/FreeSpaceSpecificationFixture.cs

@@ -54,7 +54,7 @@ namespace NzbDrone.Core.Test.MediaFileTests.EpisodeImportTests
         private void GivenFreeSpace(long size)
         {
             Mocker.GetMock<IDiskProvider>()
-                  .Setup(s => s.GetAvilableSpace(It.IsAny<String>()))
+                  .Setup(s => s.GetAvailableSpace(It.IsAny<String>()))
                   .Returns(size);
         }
 
@@ -96,7 +96,7 @@ namespace NzbDrone.Core.Test.MediaFileTests.EpisodeImportTests
             Subject.IsSatisfiedBy(_localEpisode).Should().BeTrue();
 
             Mocker.GetMock<IDiskProvider>()
-                .Verify(v => v.GetAvilableSpace(_rootFolder), Times.Once());
+                .Verify(v => v.GetAvailableSpace(_rootFolder), Times.Once());
         }
     }
 }

NzbDrone.Core.Test/ProviderTests/DiskProviderTests/FreeDiskSpaceFixture.cs

@@ -14,7 +14,7 @@ namespace NzbDrone.Core.Test.ProviderTests.DiskProviderTests
         [Test]
         public void should_return_free_disk_space()
         {
-            var result = Subject.GetAvilableSpace(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData));
+            var result = Subject.GetAvailableSpace(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData));
             result.Should().BeGreaterThan(0);
         }
 
@@ -23,7 +23,7 @@ namespace NzbDrone.Core.Test.ProviderTests.DiskProviderTests
         {
             WindowsOnly();
 
-            var result = Subject.GetAvilableSpace(@"\\localhost\c$\Windows");
+            var result = Subject.GetAvailableSpace(@"\\localhost\c$\Windows");
             result.Should().BeGreaterThan(0);
         }
 
@@ -32,13 +32,13 @@ namespace NzbDrone.Core.Test.ProviderTests.DiskProviderTests
         {
             WindowsOnly();
 
-            Assert.Throws<DirectoryNotFoundException>(() => Subject.GetAvilableSpace(@"Z:\NOT_A_REAL_PATH\DOES_NOT_EXIST".AsOsAgnostic()));
+            Assert.Throws<DirectoryNotFoundException>(() => Subject.GetAvailableSpace(@"Z:\NOT_A_REAL_PATH\DOES_NOT_EXIST".AsOsAgnostic()));
         }
 
         [Test]
         public void should_be_able_to_get_space_on_folder_that_doesnt_exist()
         {
-            var result = Subject.GetAvilableSpace(@"C:\I_DO_NOT_EXIST".AsOsAgnostic());
+            var result = Subject.GetAvailableSpace(@"C:\I_DO_NOT_EXIST".AsOsAgnostic());
             result.Should().BeGreaterThan(0);
         }
     }

NzbDrone.Core.Test/RootFolderTests/FreeSpaceOnDrivesFixture.cs

@@ -30,7 +30,7 @@ namespace NzbDrone.Core.Test.RootFolderTests
                   .Returns(@"C:\");
 
             Mocker.GetMock<IDiskProvider>()
-                  .Setup(s => s.GetAvilableSpace(@"C:\"))
+                  .Setup(s => s.GetAvailableSpace(@"C:\"))
                   .Returns(123456);
 
             var result = Subject.FreeSpaceOnDrives();
@@ -51,7 +51,7 @@ namespace NzbDrone.Core.Test.RootFolderTests
                   .Returns(@"C:\");
 
             Mocker.GetMock<IDiskProvider>()
-                  .Setup(s => s.GetAvilableSpace(@"C:\"))
+                  .Setup(s => s.GetAvailableSpace(@"C:\"))
                   .Returns(123456);
 
             var result = Subject.FreeSpaceOnDrives();
@@ -76,7 +76,7 @@ namespace NzbDrone.Core.Test.RootFolderTests
                   .Returns(@"D:\");
 
             Mocker.GetMock<IDiskProvider>()
-                  .Setup(s => s.GetAvilableSpace(It.IsAny<string>()))
+                  .Setup(s => s.GetAvailableSpace(It.IsAny<string>()))
                   .Returns(123456);
 
             var result = Subject.FreeSpaceOnDrives();
@@ -96,7 +96,7 @@ namespace NzbDrone.Core.Test.RootFolderTests
                   .Returns(@"C:\");
 
             Mocker.GetMock<IDiskProvider>()
-                  .Setup(s => s.GetAvilableSpace(It.IsAny<string>()))
+                  .Setup(s => s.GetAvailableSpace(It.IsAny<string>()))
                   .Throws(new DirectoryNotFoundException());
 
             var result = Subject.FreeSpaceOnDrives();

NzbDrone.Core/MediaFiles/EpisodeImport/Specifications/FreeSpaceSpecification.cs

@@ -24,7 +24,7 @@ namespace NzbDrone.Core.MediaFiles.EpisodeImport.Specifications
             try
             {
                 var path = Directory.GetParent(localEpisode.Series.Path);
-                var freeSpace = _diskProvider.GetAvilableSpace(path.FullName);
+                var freeSpace = _diskProvider.GetAvailableSpace(path.FullName);
 
                 if (freeSpace < localEpisode.Size + 100.Megabytes())
                 {

NzbDrone.Core/RootFolders/RootFolder.cs

@@ -8,7 +8,7 @@ namespace NzbDrone.Core.RootFolders
     {
         public string Path { get; set; }
 
-        public long FreeSpace { get; set; }
+        public long? FreeSpace { get; set; }
 
         public List<UnmappedFolder> UnmappedFolders { get; set; }
     }

NzbDrone.Core/RootFolders/RootFolderService.cs

@@ -17,7 +17,7 @@ namespace NzbDrone.Core.RootFolders
         RootFolder Add(RootFolder rootDir);
         void Remove(int id);
         List<UnmappedFolder> GetUnmappedFolders(string path);
-        Dictionary<string, long> FreeSpaceOnDrives();
+        Dictionary<string, long?> FreeSpaceOnDrives();
         RootFolder Get(int id);
     }
 
@@ -55,7 +55,7 @@ namespace NzbDrone.Core.RootFolders
             {
                 if (_diskProvider.FolderExists(folder.Path))
                 {
-                    folder.FreeSpace = _diskProvider.GetAvilableSpace(folder.Path);
+                    folder.FreeSpace = _diskProvider.GetAvailableSpace(folder.Path);
                     folder.UnmappedFolders = GetUnmappedFolders(folder.Path);
                 }
             });
@@ -82,7 +82,7 @@ namespace NzbDrone.Core.RootFolders
 
             _rootFolderRepository.Insert(rootFolder);
 
-            rootFolder.FreeSpace = _diskProvider.GetAvilableSpace(rootFolder.Path);
+            rootFolder.FreeSpace = _diskProvider.GetAvailableSpace(rootFolder.Path);
             rootFolder.UnmappedFolders = GetUnmappedFolders(rootFolder.Path);
             return rootFolder;
         }
@@ -126,9 +126,9 @@ namespace NzbDrone.Core.RootFolders
             return results;
         }
 
-        public Dictionary<string, long> FreeSpaceOnDrives()
+        public Dictionary<string, long?> FreeSpaceOnDrives()
         {
-            var freeSpace = new Dictionary<string, long>();
+            var freeSpace = new Dictionary<string, long?>();
 
             var rootDirs = All();
 
@@ -140,7 +140,7 @@ namespace NzbDrone.Core.RootFolders
                 {
                     try
                     {
-                        freeSpace.Add(pathRoot, _diskProvider.GetAvilableSpace(rootDir.Path));
+                        freeSpace.Add(pathRoot, _diskProvider.GetAvailableSpace(rootDir.Path));
                     }
                     catch (Exception ex)
                     {
@@ -155,7 +155,7 @@ namespace NzbDrone.Core.RootFolders
         public RootFolder Get(int id)
         {
             var rootFolder = _rootFolderRepository.Get(id);
-            rootFolder.FreeSpace = _diskProvider.GetAvilableSpace(rootFolder.Path);
+            rootFolder.FreeSpace = _diskProvider.GetAvailableSpace(rootFolder.Path);
             rootFolder.UnmappedFolders = GetUnmappedFolders(rootFolder.Path);
             return rootFolder;
         }