// Initialize the bottle, if necessary, then run a command in it.
public static int ExecHandler(bool verbose, IEnumerable <string> command)
{
// Get the bottle state.
var state = GetBottleState(verbose);
// If already inside, just execute it.
if (state.startedWithin)
{
return(Helpers.RunAndWait(command.First(), command.Skip(1).ToArray()));
}
using (var r = new RootPrivilege())
{
if (!state.existedAtStart)
{
InitializeBottle(verbose);
}
// At this point, we should be inside an existing bottle, one way or another.
RunCommand(verbose, command.ToArray());
}
return(0);
}
// Initialize the bottle, if necessary, then start a login prompt in it.
public static int LoginHandler(bool verbose)
{
// Get the bottle state.
var state = GetBottleState(verbose);
if (state.startedWithin)
{
Console.WriteLine("genie: already inside the bottle; cannot start login prompt!");
return(EINVAL);
}
using (var r = new RootPrivilege())
{
if (!state.existedAtStart)
{
InitializeBottle(verbose);
}
// At this point, we should be outside an existing bottle, one way or another.
// It shouldn't matter whether we have setuid here, since we start the shell with
// a login prompt, which reassigns uid appropriately.
StartLogin(verbose);
}
return(0);
}
// Initialize the bottle (if necessary) only
public static int InitializeHandler(bool verbose)
{
// Get the bottle state.
var state = GetBottleState(verbose);
// If a bottle exists, we have succeeded already. Exit and report success.
if (state.existedAtStart)
{
if (verbose)
{
Console.WriteLine("genie: bottle already exists (no need to initialize).");
}
return(0);
}
// Daemonize expects real uid root as well as effective uid root.
using (var r = new RootPrivilege())
{
// Init the bottle.
InitializeBottle(verbose);
}
return(0);
}
// Shut down the bottle and clean up.
public static int ShutdownHandler(bool verbose)
{
// Get the bottle state.
var state = GetBottleState(verbose);
if (!state.existedAtStart)
{
Console.WriteLine("genie: no bottle exists.");
return(EINVAL);
}
if (state.startedWithin)
{
Console.WriteLine("genie: cannot shut down bottle from inside bottle; exiting.");
return(EINVAL);
}
using (var r = new RootPrivilege())
{
if (verbose)
{
Console.WriteLine("genie: running systemctl poweroff within bottle");
}
var systemdPid = Helpers.GetSystemdPid();
var sd = Process.GetProcessById(systemdPid);
Helpers.Chain("nsenter",
new string[] { "-t", systemdPid.ToString(), "-m", "-p", "systemctl", "poweroff" },
"running command failed; nsenter");
Console.Write("Waiting for systemd exit...");
// Wait for systemd to exit.
int timeout = Config.SystemdStartupTimeout;
while (!sd.WaitForExit(1000))
{
Console.Write(".");
timeout--;
if (timeout < 0)
{
Console.WriteLine("\n\nTimed out waiting for systemd to exit.\nThis may indicate a systemd configuration error.\nAttempting to continue.");
break;
}
}
Console.WriteLine();
if (Config.UpdateHostname)
{
Thread.Sleep(500);
Helpers.DropHostname(verbose);
}
}
return(0);
}
// Shut down the bottle and clean up.
public static int ShutdownHandler(bool verbose)
{
// Get the bottle state.
var state = GetBottleState(verbose);
if (!state.existedAtStart)
{
Console.WriteLine("genie: no bottle exists.");
return(EINVAL);
}
if (state.startedWithin)
{
Console.WriteLine("genie: cannot shut down bottle from inside bottle; exiting.");
return(EINVAL);
}
using (var r = new RootPrivilege())
{
if (verbose)
{
Console.WriteLine("genie: running systemctl poweroff within bottle");
}
var systemdPid = Helpers.GetSystemdPid();
var sd = Process.GetProcessById(systemdPid);
Helpers.Chain("nsenter",
new string[] { "-t", systemdPid.ToString(), "-m", "-p", "systemctl", "poweroff" },
"running command failed; nsenter");
if (verbose)
{
Console.WriteLine("genie: waiting for systemd to exit");
}
// Wait for systemd to exit (maximum 16 s).
sd.WaitForExit(16000);
if (Config.UpdateHostname)
{
Thread.Sleep(500);
Helpers.DropHostname(verbose);
}
}
return(0);
}
// Shut down the bottle and clean up.
public static int ShutdownHandler(bool verbose)
{
// Get the bottle state.
var state = GetBottleState(verbose);
if (!state.existedAtStart)
{
Console.WriteLine("genie: no bottle exists.");
return(EINVAL);
}
if (state.startedWithin)
{
Console.WriteLine("genie: cannot shut down bottle from inside bottle; exiting.");
return(EINVAL);
}
using (var r = new RootPrivilege())
{
if (verbose)
{
Console.WriteLine("genie: running systemctl poweroff within bottle");
}
var systemdPid = Helpers.GetSystemdPid();
var sd = Process.GetProcessById(systemdPid);
Helpers.Chain("nsenter",
new string[] { "-t", systemdPid.ToString(), "-m", "-p", "systemctl", "poweroff" },
"running command failed; nsenter");
Console.Write("Waiting for systemd exit...");
// Wait for systemd to exit.
int timeout = Config.SystemdStartupTimeout;
while (!sd.WaitForExit(1000))
{
Console.Write(".");
timeout--;
if (timeout < 0)
{
Console.WriteLine("\n\nTimed out waiting for systemd to exit.\nThis may indicate a systemd configuration error.\nAttempting to continue.");
break;
}
}
Console.WriteLine();
// Having unmounted the binfmts fs before starting systemd, we remount it now as
// a courtesy. But remember, genie is not guaranteed to be idempotent, so don't
// rely on this, for the love of Thompson and Ritchie!
if (!Directory.Exists("/proc/sys/fs/binfmt_misc"))
{
if (verbose)
{
Console.WriteLine("genie: remounting binfmt_misc filesystem as a courtesy");
}
if (!MountHelpers.Mount("binfmt_misc", "/proc/sys/fs/binfmt_misc", FsType.BinaryFormats))
{
Console.WriteLine("genie: failed to remount binfmt_misc filesystem; attempting to continue");
}
}
if (Config.ResolvedStub)
{
Helpers.RemoveResolvSymlink(verbose);
}
if (Config.UpdateHostname)
{
Thread.Sleep(500);
Helpers.DropHostname(verbose);
}
}
return(0);
}