219 lines
9.2 KiB
Plaintext
219 lines
9.2 KiB
Plaintext
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////////////////////////////////////////////////////////////////////////////////
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//
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// Microsoft Research Singularity
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//
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// File: SdsUtils.sg
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//
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// Note:
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//
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using System;
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using System.Text;
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using System.Threading;
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using System.Collections;
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using Microsoft.Singularity;
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using Microsoft.Singularity.Directory;
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using Microsoft.Singularity.Security;
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using Microsoft.Singularity.Security.SDS;
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using Microsoft.Singularity.Channels;
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using Microsoft.Singularity.V1.Services;
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using Microsoft.SingSharp;
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namespace Microsoft.Singularity.Directory
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{
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public class SdsUtilsAcl
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{
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//------------------------------------------------------------------------------
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// QueryACL
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//------------------------------------------------------------------------------
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public static bool QueryACL (string! path, bool effective,
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DirectoryServiceContract.Imp:Ready! ds,
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out Acl aclOut, out ErrorCode errorOut )
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{
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errorOut = ErrorCode.Unknown;
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aclOut = Acl.nullAcl;
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char[]! in ExHeap exPath;
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exPath = Bitter.FromString2(path);
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bool results;
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if ( !ds.InState(DirectoryServiceContract.Ready.Value) ) DebugStub.Break();
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ds.SendQueryACL(exPath, effective);
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try {
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switch receive
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{
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case ds.NakQueryACL(error):
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// Failed: no such leaf node, or leaf node is not a file
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errorOut = error;
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return false;
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case ds.AckQueryACL(nodePattern, descendantPattern):
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// Success
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// unmarshall ACL
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errorOut = ErrorCode.NoError;
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string res1 = Bitter.ToString(nodePattern);
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string res2 = Bitter.ToString(descendantPattern);
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aclOut = new Acl(res1, res2);
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delete nodePattern;
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delete descendantPattern;
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return true;
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break;
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case ds.ChannelClosed():
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// Directory channel closed unexpectedly
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errorOut = ErrorCode.ChannelClosed;
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return false;
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break;
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case unsatisfiable :
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// should never happen.
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errorOut = ErrorCode.Unsatisfiable;
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return false;
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break;
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case ds.NakQueryACLReparse(i_prefix,
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i_suffix,
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linkFound):
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// traversed either a mount point or a link
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string pre = Bitter.ToString2(i_prefix);
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string suf = Bitter.ToString(i_suffix);
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delete i_prefix;
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delete i_suffix;
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DebugStub.WriteLine("QueryACL.reparse: pre={0}, suf={1}, linkfound ={2}",
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__arglist(pre,suf, linkFound? "true": "false"));
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// Either a SymLink or a non-leaf provider node has been encountered.
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if (linkFound) {
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//reissue search
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DebugStub.WriteLine("link: issuing rebind to{0}",__arglist(pre));
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return QueryACL(pre, effective, ds, out aclOut, out errorOut);
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}
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else {
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// Bind to the ServiceProvider and continue search
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DirectoryServiceContract.Imp dsImp =
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SdsUtils.GetDSPChannel(ds, pre, out errorOut);
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if (dsImp == null) {
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return false; // failure; code already in errorOut
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}
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try {
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if ( null == suf) {
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// Strange to get a NakCreateDirectoryReparse here!
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errorOut = ErrorCode.Unknown;
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return false;
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}
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else {
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return QueryACL(suf, effective, dsImp, out aclOut, out errorOut);
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}
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}
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finally {
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SdsUtils.ReleaseDSPChannel(pre, dsImp);
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}
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} //!linkFound
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break;
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} //switch
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}
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finally {
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if ( !ds.InState(DirectoryServiceContract.Ready.Value) ) DebugStub.Break();
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}
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} //QueryACL
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//------------------------------------------------------------------------------
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// StoreACL
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//------------------------------------------------------------------------------
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public static bool StoreACL (string! path, Acl acl,
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DirectoryServiceContract.Imp:Ready! ds,
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out ErrorCode errorOut )
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{
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errorOut = ErrorCode.Unknown;
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char[]! in ExHeap exPath;
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char[] in ExHeap exAclStr1, exAclStr2;
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exPath = Bitter.FromString2(path);
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exAclStr1 = Bitter.FromString(acl.Node);
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exAclStr2 = Bitter.FromString(acl.Descendant);
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bool results;
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if ( !ds.InState(DirectoryServiceContract.Ready.Value) ) DebugStub.Break();
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ds.SendStoreACL(exPath, exAclStr1, exAclStr2);
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try {
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switch receive
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{
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case ds.NakStoreACL(error):
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// Failed: no such leaf node, or leaf node is not a file
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errorOut = error;
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return false;
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case ds.AckStoreACL():
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// Success
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errorOut = ErrorCode.NoError;
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return true;
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break;
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case ds.ChannelClosed():
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// Directory channel closed unexpectedly
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errorOut = ErrorCode.ChannelClosed;
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return false;
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break;
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case unsatisfiable :
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// should never happen.
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errorOut = ErrorCode.Unsatisfiable;
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return false;
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break;
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case ds.NakStoreACLReparse(i_prefix,
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i_suffix,
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linkFound) :
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// traversed either a mount point or a link
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string pre= Bitter.ToString2(i_prefix);
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string suf= Bitter.ToString(i_suffix);
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delete i_prefix;
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delete i_suffix;
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DebugStub.WriteLine("StoreACL.reparse: pre={0}, suf={1}, linkfound ={2}",
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__arglist(pre, suf, linkFound? "true": "false"));
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// Either a SymLink or a non-leaf provider node has been encountered.
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if (linkFound) {
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//reissue search
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DebugStub.WriteLine("link: issuing rebind to{0}",__arglist(pre));
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return StoreACL(pre, acl, ds, out errorOut);
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}
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else {
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// Bind to the ServiceProvider and continue search
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DirectoryServiceContract.Imp dsImp =
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SdsUtils.GetDSPChannel(ds, pre, out errorOut);
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if (dsImp == null) {
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return false; // failure; code already in errorOut
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}
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try {
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if ( null == suf) {
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// Strange to get a NakCreateDirectoryReparse here!
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errorOut = ErrorCode.Unknown;
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return false;
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}
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else {
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return StoreACL(suf, acl, dsImp, out errorOut);
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}
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}
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finally {
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SdsUtils.ReleaseDSPChannel(pre, dsImp);
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}
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} //!linkFound
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break;
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} //switch
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}
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finally {
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if ( !ds.InState(DirectoryServiceContract.Ready.Value) ) DebugStub.Break();
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}
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} //StoreAcl
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} // class
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}
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