Unix file system implementation is complete

README.md

@@ -17,12 +17,13 @@ The library is released under the [![MIT license](https://img.shields.io/github/
 
 ## Compilation
 
-* Visual Studio 2017 / C# 7.3
+* Visual Studio 2019 / C# 8.0
 
 ## Using
 
-* Visual Studio 2017
-* .NET Standard 2.0
+* Visual Studio 2019
+* .NET Standard 2.0 (everything **except** sample application, PAM authentication)
+* .NET Core 3.0 (sample application, PAM authentication)
 
 ## NuGet packages
 

samples/TestFtpServer/Program.cs

@@ -17,6 +17,7 @@
 using FubarDev.FtpServer.FileSystem.DotNet;
 using FubarDev.FtpServer.FileSystem.GoogleDrive;
 using FubarDev.FtpServer.FileSystem.InMemory;
+using FubarDev.FtpServer.MembershipProvider.Pam;
 
 using Google.Apis.Auth.OAuth2;
 using Google.Apis.Drive.v3;
@@ -47,16 +48,21 @@ private static int Main(string[] args)
                         switch (v)
                         {
                             case "custom":
-                                options.MembershipProviderType = MembershipProviderType.Custom;
+                                options.MembershipProviderType |= MembershipProviderType.Custom;
                                 break;
                             case "anonymous":
-                                options.MembershipProviderType = MembershipProviderType.Anonymous;
+                                options.MembershipProviderType |= MembershipProviderType.Anonymous;
+                                break;
+                            case "pam":
+                                options.MembershipProviderType |= MembershipProviderType.PAM;
                                 break;
                             default:
                                 throw new ApplicationException("Invalid authentication module");
                         }
                     }
                 },
+                "Workarounds",
+                { "no-pam-account-management", "Disable the PAM account management", v => options.NoPamAccountManagement = v != null },
                 "Server",
                 { "a|address=", "Sets the IP address or host name", v => options.ServerAddress = v },
                 { "p|port=", "Sets the listen port", v => options.Port = Convert.ToInt32(v) },
@@ -92,6 +98,14 @@ private static int Main(string[] args)
                     },
                     Run = a => RunWithFileSystemAsync(a.ToArray(), options).Wait(),
                 },
+                new Command("unix", "Use the Unix file system access")
+                {
+                    Options = new OptionSet()
+                    {
+                        "usage: ftpserver unix",
+                    },
+                    Run = a => RunWithUnixFileSystemAsync(options).Wait(),
+                },
                 new Command("in-memory", "Use the in-memory file system access")
                 {
                     Options = new OptionSet()
@@ -148,6 +162,14 @@ private static Task RunWithFileSystemAsync(string[] args, TestFtpServerOptions o
             return RunAsync(services);
         }
 
+        private static Task RunWithUnixFileSystemAsync(TestFtpServerOptions options)
+        {
+            options.Validate();
+            var services = CreateServices(options)
+               .AddFtpServer(sb => Configure(sb, options).UseUnixFileSystem());
+            return RunAsync(services);
+        }
+
         private static async Task RunWithGoogleDriveUserAsync(string[] args, TestFtpServerOptions options)
         {
             options.Validate();
@@ -255,7 +277,8 @@ private static IServiceCollection CreateServices(TestFtpServerOptions options)
                             opt.PasvMaxPort = options.PassivePortRange.Value.Item2;
                         }
                     })
-               .Configure<GoogleDriveOptions>(opt => opt.UseBackgroundUpload = options.UseBackgroundUpload);
+               .Configure<GoogleDriveOptions>(opt => opt.UseBackgroundUpload = options.UseBackgroundUpload)
+               .Configure<PamMembershipProviderOptions>(opt => opt.IgnoreAccountManagement = options.NoPamAccountManagement);
 
             if (options.ImplicitFtps)
             {
@@ -286,15 +309,24 @@ private static IServiceCollection CreateServices(TestFtpServerOptions options)
 
         private static IFtpServerBuilder Configure(IFtpServerBuilder builder, TestFtpServerOptions options)
         {
-            switch (options.MembershipProviderType)
+            if (options.MembershipProviderType == MembershipProviderType.Default)
+            {
+                return builder.EnableAnonymousAuthentication();
+            }
+
+            if ((options.MembershipProviderType & MembershipProviderType.Anonymous) != 0)
+            {
+                builder = builder.EnableAnonymousAuthentication();
+            }
+
+            if ((options.MembershipProviderType & MembershipProviderType.Custom) != 0)
+            {
+                builder.Services.AddSingleton<IMembershipProvider, CustomMembershipProvider>();
+            }
+
+            if ((options.MembershipProviderType & MembershipProviderType.PAM) != 0)
             {
-                case MembershipProviderType.Anonymous:
-                    return builder.EnableAnonymousAuthentication();
-                case MembershipProviderType.Custom:
-                    builder.Services.AddSingleton<IMembershipProvider, CustomMembershipProvider>();
-                    break;
-                default:
-                    throw new InvalidOperationException($"Unknown membership provider {options.MembershipProviderType}");
+                builder = builder.EnablePamAuthentication();
             }
 
             return builder;

samples/TestFtpServer/TestFtpServerOptions.cs

@@ -14,7 +14,7 @@ public class TestFtpServerOptions
         /// <summary>
         /// Gets or sets a value indicating whether the help message should be shown.
         /// </summary>
-        public bool ShowHelp { get;set; }
+        public bool ShowHelp { get; set; }
 
         /// <summary>
         /// Gets or sets the requested server address.
@@ -59,13 +59,18 @@ public class TestFtpServerOptions
         /// <summary>
         /// Gets or sets the membership provider to be used.
         /// </summary>
-        public MembershipProviderType MembershipProviderType { get; set; } = MembershipProviderType.Anonymous;
+        public MembershipProviderType MembershipProviderType { get; set; } = MembershipProviderType.Default;
 
         /// <summary>
         /// Gets or sets the passive port range.
         /// </summary>
         public (int, int)? PassivePortRange { get; set; }
 
+        /// <summary>
+        /// Gets or sets a value indicating whether PAM account management is disabled.
+        /// </summary>
+        public bool NoPamAccountManagement { get; set; }
+
         /// <summary>
         /// Gets the requested or the default port.
         /// </summary>
@@ -90,16 +95,27 @@ public void Validate()
     /// <summary>
     /// The selected membership provider.
     /// </summary>
+    [Flags]
     public enum MembershipProviderType
     {
+        /// <summary>
+        /// Use the default membership provider (<see cref="Anonymous"/>).
+        /// </summary>
+        Default = 0,
+
         /// <summary>
         /// Use the custom (example) membership provider.
         /// </summary>
-        Custom,
+        Custom = 1,
 
         /// <summary>
         /// Use the membership provider for anonymous users.
         /// </summary>
-        Anonymous,
+        Anonymous = 2,
+
+        /// <summary>
+        /// Use the PAM membership provider.
+        /// </summary>
+        PAM = 4,
     }
 }

src/FubarDev.FtpServer.FileSystem.Unix/UnixDirectoryEntry.cs

@@ -22,6 +22,7 @@ internal class UnixDirectoryEntry : UnixFileSystemEntry, IUnixDirectoryEntry
             : base(info)
         {
             IsRoot = parent == null;
+            Info = info;
 
             if (parent == null)
             {
@@ -35,10 +36,15 @@ internal class UnixDirectoryEntry : UnixFileSystemEntry, IUnixDirectoryEntry
             }
             else
             {
-                IsDeletable = parent.GetEffectivePermissions(user, userInfo).Write;
+                IsDeletable = parent.GetEffectivePermissions(user, userInfo.UserId, userInfo.GroupId).Write;
             }
         }
 
+        /// <summary>
+        /// Gets the unix directory info.
+        /// </summary>
+        public UnixDirectoryInfo Info { get; }
+
         /// <inheritdoc />
         public bool IsRoot { get; }
 

src/FubarDev.FtpServer.FileSystem.Unix/UnixFileEntry.cs

@@ -17,9 +17,15 @@ internal class UnixFileEntry : UnixFileSystemEntry, IUnixFileEntry
         public UnixFileEntry([NotNull] UnixFileInfo info)
             : base(info)
         {
+            Info = info;
             Size = info.Length;
         }
 
+        /// <summary>
+        /// Gets the unix file info.
+        /// </summary>
+        public UnixFileInfo Info { get; }
+
         /// <inheritdoc />
         public long Size { get; }
     }