public void WeCanFetchAllProcesses()
{
var result = UnsafeUtility.EnumerateProcesses();
Assert.True(result.Count > 1);
Assert.True(result.Count != 2048);
}
public void KillAllProcessesBelongingToPackage()
{
var ourExe = Assembly.GetEntryAssembly();
var ourExePath = ourExe != null
? ourExe.Location
: null;
UnsafeUtility.EnumerateProcesses()
.Where(
x =>
{
// Processes we can't query will have an empty process name, we can't kill them
// anyways
if (string.IsNullOrWhiteSpace(x.Item1))
{
return(false);
}
// Files that aren't in our root app directory are untouched
if (!x.Item1.StartsWith(rootAppDirectory, StringComparison.OrdinalIgnoreCase))
{
return(false);
}
// Never kill our own EXE
if (ourExePath != null && x.Item1.Equals(ourExePath, StringComparison.OrdinalIgnoreCase))
{
return(false);
}
var name = Path.GetFileName(x.Item1).ToLowerInvariant();
if (name == "squirrel.exe" || name == "update.exe")
{
return(false);
}
return(true);
})
.ForEach(
x =>
{
try
{
Log.WarnIfThrows(() => Process.GetProcessById(x.Item2).Kill());
}
catch
{
}
});
}
// NB: Once we uninstall the old version of the app, we try to schedule
// it to be deleted at next reboot. Unfortunately, depending on whether
// the user has admin permissions, this can fail. So as a failsafe,
// before we try to apply any update, we assume previous versions in the
// directory are "dead" (i.e. already uninstalled, but not deleted), and
// we blow them away. This is to make sure that we don't attempt to run
// an uninstaller on an already-uninstalled version.
private async Task CleanDeadVersions(SemanticVersion originalVersion, SemanticVersion currentVersion, bool forceUninstall = false)
{
if (currentVersion == null)
{
return;
}
var di = new DirectoryInfo(rootAppDirectory);
if (!di.Exists)
{
return;
}
Log.InfoFormat("cleanDeadVersions: for version {0}", currentVersion);
string originalVersionFolder = null;
if (originalVersion != null)
{
originalVersionFolder = GetDirectoryForRelease(originalVersion).Name;
Log.InfoFormat("cleanDeadVersions: exclude folder {0}", originalVersionFolder);
}
string currentVersionFolder = null;
if (currentVersion != null)
{
currentVersionFolder = GetDirectoryForRelease(currentVersion).Name;
Log.InfoFormat("cleanDeadVersions: exclude folder {0}", currentVersionFolder);
}
// NB: If we try to access a directory that has already been
// scheduled for deletion by MoveFileEx it throws what seems like
// NT's only error code, ERROR_ACCESS_DENIED. Squelch errors that
// come from here.
var toCleanup = di.GetDirectories()
.Where(x => x.Name.ToLowerInvariant().Contains("app-"))
.Where(x => x.Name != currentVersionFolder && x.Name != originalVersionFolder)
.Where(x => !IsAppFolderDead(x.FullName));
if (forceUninstall == false)
{
await toCleanup.ForEachAsync(
async x =>
{
var squirrelApps = SquirrelAwareExecutableDetector.GetAllSquirrelAwareApps(x.FullName);
var args = $"--squirrel-obsolete {x.Name.Replace("app-", "")}";
if (squirrelApps.Count > 0)
{
// For each app, run the install command in-order and wait
await squirrelApps.ForEachAsync(
async exe =>
{
using (var cts = new CancellationTokenSource())
{
cts.CancelAfter(10 * 1000);
try
{
await Utility.InvokeProcessAsync(exe, args, cts.Token);
}
catch (Exception ex)
{
Log.Error("Coudln't run Squirrel hook, continuing: " + exe, ex);
}
}
},
1 /* at a time */);
}
});
}
// Include dead folders in folders to :fire:
toCleanup = di.GetDirectories()
.Where(x => x.Name.ToLowerInvariant().Contains("app-"))
.Where(x => x.Name != currentVersionFolder && x.Name != originalVersionFolder);
// Get the current process list in an attempt to not burn
// directories which have running processes
var runningProcesses = UnsafeUtility.EnumerateProcesses();
// Finally, clean up the app-X.Y.Z directories
await toCleanup.ForEachAsync(
async x =>
{
try
{
if (runningProcesses.All(p => p.Item1 == null || !p.Item1.StartsWith(x.FullName, StringComparison.OrdinalIgnoreCase)))
{
await Utility.DeleteDirectoryOrJustGiveUp(x.FullName);
}
if (Directory.Exists(x.FullName))
{
// NB: If we cannot clean up a directory, we need to make
// sure that anyone finding it later won't attempt to run
// Squirrel events on it. We'll mark it with a .dead file
MarkAppFolderAsDead(x.FullName);
}
}
catch (UnauthorizedAccessException ex)
{
Log.Warn("Couldn't delete directory: " + x.FullName, ex);
// NB: Same deal as above
MarkAppFolderAsDead(x.FullName);
}
});
// Clean up the packages directory too
var releasesFile = Utility.LocalReleaseFileForAppDir(rootAppDirectory);
var entries = ReleaseEntry.ParseReleaseFile(File.ReadAllText(releasesFile, Encoding.UTF8));
var pkgDir = Utility.PackageDirectoryForAppDir(rootAppDirectory);
var releaseEntry = default(ReleaseEntry);
foreach (var entry in entries)
{
if (entry.Version == currentVersion)
{
releaseEntry = ReleaseEntry.GenerateFromFile(Path.Combine(pkgDir, entry.Filename));
continue;
}
File.Delete(Path.Combine(pkgDir, entry.Filename));
}
ReleaseEntry.WriteReleaseFile(new[] { releaseEntry }, releasesFile);
}