- last login name is saved

- wait image should be displayed right now
- the qApp object is destroyed before the launcher is started -- this
  should prevent some semaphore permission problems
- added a (very basic) crash handler
- added a simple "respawned too fast" detection in case of qt/e fb problems
- if opie-login is started with -a <user> or --autologin <user> it doesn't
  prompt for a username/password - instead it loads qpe directly using the
  specified user account
  So even if you are not running multiuser, you should now start qpe with:
  opie-login --autologin=root

5 files changed, 398 insertions, 233 deletions

diff --git a/core/opie-login/loginapplication.cpp b/core/opie-login/loginapplication.cpp
new file mode 100644
index 0000000..cd58c47
--- a/dev/null
+++ b/core/opie-login/loginapplication.cpp
@@ -0,0 +1,193 @@
+#include <pwd.h>
+#include <grp.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <signal.h>
+
+#ifdef USEPAM
+extern "C" {
+#include <security/pam_appl.h>
+}
+#else
+#include <crypt.h>
+#include <shadow.h>
+#endif
+
+#include "loginapplication.h"
+
+LoginApplication *lApp;
+
+LoginApplication::LoginApplication ( int &argc, char **argv )
+	: QPEApplication ( argc, argv, GuiServer )
+{
+	lApp = this;
+}
+
+const char *LoginApplication::s_username = 0;
+
+#ifdef USEPAM
+
+const char *LoginApplication::s_pam_password = 0;
+
+int LoginApplication::pam_helper ( int num_msg, const struct pam_message **msg, struct pam_response **resp, void * )
+{
+	int replies = 0;
+	struct pam_response *reply = 0;
+	int size = sizeof( struct pam_response );
+
+	for ( int i = 0; i < num_msg; i++ ) {
+		switch ( msg [i]-> msg_style ) {
+			case PAM_PROMPT_ECHO_ON: // user name given to PAM already
+				return PAM_CONV_ERR;
+
+			case PAM_PROMPT_ECHO_OFF: // wants password
+				reply = (struct pam_response *) ::realloc ( reply, size );
+				if ( !reply )
+					return PAM_CONV_ERR;
+				size += sizeof( struct pam_response );
+
+				reply [replies]. resp_retcode = PAM_SUCCESS;
+				reply [replies]. resp = ::strdup ( s_pam_password );
+				replies++; // PAM frees resp
+				break;
+
+			case PAM_TEXT_INFO:
+				break;
+
+			default:
+				/* unknown or PAM_ERROR_MSG */
+				if ( reply )
+					::free ( reply );
+				return PAM_CONV_ERR;
+		}
+	}
+	if ( reply )
+		*resp = reply;
+	return PAM_SUCCESS;
+}
+
+
+bool LoginApplication::checkPassword ( const char *user, const char *pass )
+{
+	static struct pam_conv conv = { &LoginApplication::pam_helper, 0 };
+
+	int pam_error;
+	pam_handle_t *pamh = 0;
+
+	pam_error = ::pam_start( "xdm", user, &conv, &pamh );
+	if ( pam_error == PAM_SUCCESS ) {
+		s_pam_password = pass;
+		pam_error = ::pam_authenticate ( pamh, 0 );
+		s_pam_password = 0;
+	}
+	::pam_end ( pamh, pam_error );
+	return ( pam_error == PAM_SUCCESS );
+}
+
+#else
+
+bool LoginApplication::checkPassword ( const char *user, const char *pass )
+{
+	char *encrypted, *correct;
+	struct passwd *pw;
+
+	if ( !user || !pass )
+		return false;
+
+	pw = ::getpwnam ( user );
+
+	if ( !pw )
+		return false;
+
+	if (( ::strcmp ( pw-> pw_passwd, "x" ) == 0 ) || ( ::strcmp ( pw-> pw_passwd, "*" ) == 0 )) {
+		struct spwd *sp = ::getspnam ( pw-> pw_name );
+
+		if ( !sp )
+			return false;
+
+		correct = sp-> sp_pwdp;
+	}
+	else
+		correct = pw-> pw_passwd;
+
+	if ( correct == 0 || correct[0] == '\0' )
+		return true;
+
+	encrypted = ::crypt ( pass, correct );
+	return ( ::strcmp ( encrypted, correct ) == 0 );
+}
+
+#endif
+
+bool LoginApplication::changeIdentity ( )
+{
+	const char *DEFAULT_LOGIN_PATH      = "/bin:/usr/bin";
+	const char *DEFAULT_ROOT_LOGIN_PATH = "/usr/sbin:/bin:/usr/bin:/sbin";
+
+	if ( !s_username )
+		return false;
+	struct passwd *pw = ::getpwnam ( s_username );
+	if ( !pw )
+		return false;
+
+	bool fail = false;
+	fail |= ( ::initgroups ( pw-> pw_name, pw-> pw_gid ));
+	::endgrent ( );
+	fail |= ( ::setgid ( pw-> pw_gid ));
+	fail |= ( ::setuid ( pw-> pw_uid ));
+
+	fail |= ( ::chdir ( pw-> pw_dir ) && ::chdir ( "/" ));
+
+	fail |= ( ::setenv ( "HOME",    pw-> pw_dir, 1 ));
+	fail |= ( ::setenv ( "SHELL",   pw-> pw_shell, 1 ));
+	fail |= ( ::setenv ( "USER",    pw-> pw_name, 1 ));
+	fail |= ( ::setenv ( "LOGNAME", pw-> pw_name, 1 ));
+	fail |= ( ::setenv ( "PATH",    ( pw-> pw_uid ? DEFAULT_LOGIN_PATH : DEFAULT_ROOT_LOGIN_PATH ), 1 ));
+
+	return !fail;
+}
+
+bool LoginApplication::login ( )
+{
+	char *opie = ::getenv ( "OPIEDIR" );
+	char *arg = new char [::strlen ( opie ) + 8 + 1];
+
+	::strcpy ( arg, opie );
+	::strcat ( arg, "/bin/qpe" );
+
+	// start qpe via a login shell
+	::execl ( "/bin/sh", "-sh", "-c", arg, 0 );
+
+	return false;
+}
+
+const char *LoginApplication::loginAs ( )
+{
+	return s_username;
+}
+
+void LoginApplication::setLoginAs ( const char *name )
+{
+	s_username = name;
+}
+
+QStringList LoginApplication::allUsers ( )
+{
+	struct passwd *pwd;
+	QStringList sl;
+
+	while (( pwd = ::getpwent ( ))) {
+		if (( pwd-> pw_uid == 0 ) || ( pwd-> pw_uid >= 500 && pwd-> pw_uid < 65534 ))
+			sl << QString ( pwd-> pw_name );
+	}
+
+	::endpwent ( );
+
+	return sl;
+}
+
+void LoginApplication::quitToConsole ( )
+{
+	QPEApplication::quit ( );
+	::kill ( ::getppid ( ), SIGTERM );
+}
diff --git a/core/opie-login/loginapplication.h b/core/opie-login/loginapplication.h
new file mode 100644
index 0000000..a709c5b
--- a/dev/null
+++ b/core/opie-login/loginapplication.h
@@ -0,0 +1,40 @@
+#ifndef __OPIE_LOGINAPPLICATION_H__
+#define __OPIE_LOGINAPPLICATION_H__
+
+#include <qstringlist.h>
+
+#include <qpe/qpeapplication.h>
+
+#ifdef USEPAM
+struct pam_message;
+struct pam_response;
+#endif
+
+class LoginApplication : public QPEApplication {
+public:
+	LoginApplication ( int &argc, char **argv );
+
+	static bool checkPassword ( const char *user, const char *password );
+
+	static const char *loginAs ( );
+	static void setLoginAs ( const char *user );
+
+	static bool changeIdentity ( );
+	static bool login ( );
+
+	static QStringList allUsers ( );
+
+	void quitToConsole ( );
+
+private:
+	static const char *s_username;
+
+#ifdef USEPAM
+	static int pam_helper ( int num_msg, const struct pam_message **msg, struct pam_response **resp, void * );
+	static const char *s_pam_password;
+#endif
+};
+
+extern LoginApplication *lApp;
+
+#endif
diff --git a/core/opie-login/loginwindowimpl.cpp b/core/opie-login/loginwindowimpl.cpp
index c59338f..3694513 100644
--- a/core/opie-login/loginwindowimpl.cpp
+++ b/core/opie-login/loginwindowimpl.cpp
@@ -4,76 +4,71 @@
 #include <qframe.h>
 #include <qlineedit.h>
 #include <qtimer.h>
 #include <qcombobox.h>
 #include <qpixmap.h>
 #include <qlabel.h>
 #include <qpopupmenu.h>
 #include <qmessagebox.h>
 #include <qimage.h>
 
 #include <qpe/resource.h>
 #include <qpe/qcopenvelope_qws.h>
+#include <qpe/config.h>
 
 #include <opie/odevice.h>
 
 #include <stdio.h>
-
-#include <pwd.h>
-#include <grp.h>
-#include <unistd.h>
 #include <stdlib.h>
-#include <signal.h>
-
-#ifdef USEPAM
-extern "C" {
-#include <security/pam_appl.h>
-}
-#else
-#include <crypt.h>
-#include <shadow.h>
-#endif
 
 #include "loginwindowimpl.h"
+#include "loginapplication.h"
 #include "inputmethods.h"
 
 using namespace Opie;
 
 
 LoginWindowImpl::LoginWindowImpl ( ) : LoginWindow ( 0, "LOGIN-WINDOW", WStyle_Customize | WStyle_NoBorder | WDestructiveClose )
 {
 	QPopupMenu *pop = new QPopupMenu ( this );
 	pop-> insertItem ( tr( "Restart" ), this, SLOT( restart ( )));
 	pop-> insertItem ( tr( "Quit" ), this, SLOT( quit ( )));
 	m_menu-> setPopup ( pop );
 
 	QHBoxLayout *lay = new QHBoxLayout ( m_taskbar, 4, 4 );
 	m_input = new InputMethods ( m_taskbar );
 	lay-> addWidget ( m_input );
 	lay-> addStretch ( 10 );
 
 	setActiveWindow ( );
 	m_password-> setFocus ( );
 
-	m_user-> insertStringList ( getAllUsers ( ));
+	m_user-> insertStringList ( lApp-> allUsers ( ));
 
 	QTimer::singleShot ( 0, this, SLOT( showIM ( )));
 
 	QString opiedir = ::getenv ( "OPIEDIR" );
 	QPixmap bgpix ( opiedir + "/pics/launcher/opie-background.jpg" );
 
 	if ( !bgpix. isNull ( ))
 		setBackgroundPixmap ( bgpix );
 
 	m_caption-> setText ( m_caption-> text ( ) + tr( "<center>%1 %2</center>" ). arg ( ODevice::inst ( )-> systemString ( )). arg ( ODevice::inst ( )-> systemVersionString ( )));
+
+	Config cfg ( "opie-login" );
+	cfg. setGroup ( "General" );
+	QString last = cfg. readEntry ( "LastLogin" );
+
+	if ( !last. isEmpty ( ))
+		m_user-> setEditText ( last );
 }
 
 LoginWindowImpl::~LoginWindowImpl ( )
 {
 }
 
 void LoginWindowImpl::keyPressEvent ( QKeyEvent *e )
 {
 	switch ( e-> key ( )) {
 		case HardKey_Suspend:   suspend ( );
 		                        break;
 		case HardKey_Backlight: backlight ( );
@@ -81,265 +76,102 @@ void LoginWindowImpl::keyPressEvent ( QKeyEvent *e )
 		default:                e-> ignore ( );
 		                        break;
 	}
 	LoginWindow::keyPressEvent ( e );
 }
 
 
 void LoginWindowImpl::toggleEchoMode ( bool t )
 {
 	m_password-> setEchoMode ( t ? QLineEdit::Normal : QLineEdit::Password );
 }
 
-
-QStringList LoginWindowImpl::getAllUsers ( )
-{
-	struct passwd *pwd;
-	QStringList sl;
-
-	while (( pwd = ::getpwent ( ))) {
-		if (( pwd-> pw_uid == 0 ) || ( pwd-> pw_uid >= 500 && pwd-> pw_uid < 65534 ))
-			sl << QString ( pwd-> pw_name );
-	}
-
-	::endpwent ( );
-
-	return sl;
-}
-
 void LoginWindowImpl::showIM ( )
 {
 	m_input-> showInputMethod ( );
 }
 
 void LoginWindowImpl::restart ( )
 {
 	qApp-> quit ( );
 }
 
 void LoginWindowImpl::quit ( )
 {
-	qApp-> quit ( );
-	::kill ( ::getppid ( ), SIGUSR1 );
+	lApp-> quitToConsole ( );
 }
 
 void LoginWindowImpl::suspend ( )
 {
 	ODevice::inst ( )-> suspend ( );
 
 	QCopEnvelope e("QPE/System", "setBacklight(int)");
 	e << -3; // Force on
 }
 
 void LoginWindowImpl::backlight ( )
 {
 	QCopEnvelope e("QPE/System", "setBacklight(int)");
 	e << -2; // toggle
 }
 
-#ifdef USEPAM
-
-static const char *_PAM_SERVICE = "xdm";
-static const char *PAM_password;
-
-typedef const struct pam_message pam_message_type;
-
-static int PAM_conv( int, pam_message_type **,  struct pam_response **,  void * );
-
-static struct pam_conv PAM_conversation = {
-  &PAM_conv,
-  NULL
-};
-
-//----------------------------------------------------------------------------
-
-static char *COPY_STRING( const char * s ) {
-  return (s) ? strdup(s) : (char *)NULL;
-}
-
-#define GET_MEM if (reply) realloc(reply, size);\
-                     else reply = (struct pam_response *)malloc(size); \
-	             if (!reply) return PAM_CONV_ERR; \
-	             size += sizeof(struct pam_response)
-
-
-static int PAM_conv( int num_msg, pam_message_type **msg,
-		     struct pam_response **resp,  void *)
-{
-  int count = 0, replies = 0;
-  struct pam_response *reply = NULL;
-  int size = sizeof(struct pam_response);
-
-  for( count = 0; count < num_msg; count++ ) {
-    switch (msg[count]->msg_style) {
-    case PAM_PROMPT_ECHO_ON:
-      /* user name given to PAM already */
-      return PAM_CONV_ERR;
-
-    case PAM_PROMPT_ECHO_OFF:
-      /* wants password */
-      GET_MEM;
-      reply[replies].resp_retcode = PAM_SUCCESS;
-      reply[replies].resp = COPY_STRING(PAM_password);
-      replies++;
-      /* PAM frees resp */
-      break;
-    case PAM_TEXT_INFO:
-      break;
-    default:
-      /* unknown or PAM_ERROR_MSG */
-      if (reply) free (reply);
-      return PAM_CONV_ERR;
-    }
-  }
-  if (reply) *resp = reply;
-  return PAM_SUCCESS;
-}
-
-
-static bool pwcheck_PAM( const char *user, const char *password )
-{
-  bool pw_correct = false;
-  int pam_error;
-  int pam_return = 0;
-  pam_handle_t *pamh = 0;
-  PAM_password = password;
-
-  pam_error = pam_start( _PAM_SERVICE, user, &PAM_conversation, &pamh );
-  if( pam_error == PAM_SUCCESS ) {
-    pam_error = pam_authenticate( pamh, 0 );
-    if( pam_error == PAM_SUCCESS ) {
-      //-- password correct
-      pw_correct = true;
-      pam_return = PAM_SUCCESS;
-    } else {
-      pam_return = pam_error;
-    }
-  } else {
-    //  cerr << "PAM error: " << pam_strerror( pamh, pam_error ) << endl;
-  }
-  pam_end( pamh, pam_return );
-  return pw_correct;
-}
-
-#else
-
-//----------------------------------------------------------------------------
-
-static bool pwcheck_Unix( const char *user, const char *pass )
-{
-	char *encrypted, *correct;
-	struct passwd *pw;
-
-	if ( !user || !pass )
-		return false;
-
-	pw = getpwnam ( user );
-
-	if ( !pw )
-		return false;
-
-	if (( strcmp ( pw-> pw_passwd, "x" ) == 0 ) || ( strcmp ( pw-> pw_passwd, "*" ) == 0 )) {
-		struct spwd *sp = getspnam ( pw-> pw_name );
-
-		if ( !sp )
-			return false;
-
-		correct = sp-> sp_pwdp;
+class WaitLogo : public QLabel {
+public:
+	WaitLogo ( ) : QLabel ( 0, "wait hack!", WStyle_Customize | WStyle_NoBorder | WStyle_Tool )
+	{
+		QImage img = Resource::loadImage ( "launcher/new_wait" );
+		QPixmap pix;
+		pix. convertFromImage ( img );
+		setPixmap ( pix );
+		setAlignment ( AlignCenter );
+		move ( 0, 0 );
+		resize ( qApp-> desktop ( )-> width ( ), qApp-> desktop ( )-> height ( ));
+		
+		m_visible = false;
+		show ( );
 	}
-	else
-		correct = pw-> pw_passwd;
-
-	if ( correct == 0 || correct[0] == '\0' )
-		return true;
 
-	encrypted = crypt ( pass, correct );
-	return ( strcmp ( encrypted, correct ) == 0 );
-}
-
-#endif
-
-
-bool LoginWindowImpl::changeIdentity ( const char *user )
-{
-	const char *DEFAULT_LOGIN_PATH      = "/bin:/usr/bin";
-	const char *DEFAULT_ROOT_LOGIN_PATH = "/usr/sbin:/bin:/usr/bin:/sbin";
-
-	bool fail = false;
-	struct passwd *pw = getpwnam ( user );
-
-	fail |= ( pw == 0 );
-	fail |= ( initgroups ( pw-> pw_name, pw-> pw_gid ));
-	endgrent ( );
-	fail |= ( setgid ( pw-> pw_gid ));
-	fail |= ( setuid ( pw-> pw_uid ));
-
-	fail |= ( chdir ( pw-> pw_dir ) && chdir ( "/" ));
+	virtual void showEvent ( QShowEvent *e )
+	{
+		QLabel::showEvent ( e );
+		m_visible = true;
+	}
 
-	fail |= ( setenv ( "HOME",    pw-> pw_dir, 1 ));
-	fail |= ( setenv ( "SHELL",   pw-> pw_shell, 1 ));
-	fail |= ( setenv ( "USER",    pw-> pw_name, 1 ));
-	fail |= ( setenv ( "LOGNAME", pw-> pw_name, 1 ));
-	fail |= ( setenv ( "PATH",    ( pw-> pw_uid ? DEFAULT_LOGIN_PATH : DEFAULT_ROOT_LOGIN_PATH ), 1 ));
+	virtual void paintEvent ( QPaintEvent *e )
+	{
+		QLabel::paintEvent ( e );
+		if ( m_visible )
+			qApp-> quit ( );
+	}
 
-	return !fail;
-}
+private:
+	bool m_visible;
+};
 
 void LoginWindowImpl::login ( )
 {
 	const char *user = ::strdup ( m_user-> currentText ( ). local8Bit ( ));
 	const char *pass = ::strdup ( m_password-> text ( ). local8Bit ( ));
-	bool ok;
 
 	if ( !user || !user [0] )
 		return;
 	if ( !pass )
 		pass = "";
 
-#if defined( USEPAM )
-	ok = pwcheck_PAM ( user, pass );
-#else
-	ok = pwcheck_Unix ( user, pass );
-#endif
-
-	if ( ok ) {
-		if ( changeIdentity ( user )) {
-			// Draw a big wait icon, the image can be altered in later revisions
-			QWidget *d = QApplication::desktop ( );
-			m_input-> hideInputMethod ( );
-
-			QImage img = Resource::loadImage( "launcher/new_wait" );
-			QPixmap pix;
-			pix. convertFromImage ( img );
-			QLabel *w = new QLabel ( 0, "wait hack!", WStyle_Customize | WStyle_NoBorder | WStyle_Tool );
-			w-> setPixmap ( pix );
-			w-> setAlignment ( AlignCenter );
-			w-> showMaximized ( );
-			qApp-> processEvents ( );
-
-			char *opie = ::getenv ( "OPIEDIR" );
-			char *arg = new char [::strlen ( opie ) + 8 + 1];
-
-			::strcpy ( arg, opie );
-			::strcat ( arg, "/bin/qpe" );
-
-			// start qpe via a login shell
-			::execl ( "/bin/sh", "-sh", "-c", arg, 0 );
-
-			w-> hide ( );
-			delete w;
-
-			QMessageBox::critical ( this, tr( "Failure" ), tr( "Could not start OPIE\n(%1)." ). arg ( arg ));
-			delete [] arg;
-
-			restart ( );
-		}
-		else {
-			QMessageBox::critical ( this, tr( "Failure" ), tr( "Could not switch to new user identity" ));
-			restart ( );
-		}
+	if ( lApp-> checkPassword ( user, pass )) {
+		Config cfg ( "opie-login" );
+		cfg. setGroup ( "General" );
+		cfg. writeEntry ( "LastLogin", user );
+		cfg. write ( );
+
+		lApp-> setLoginAs ( user );
+
+		// Draw a big wait icon, the image can be altered in later revisions
+		m_input-> hideInputMethod ( );
+		new WaitLogo ( );
+		// WaitLogo::showEvent() calls qApp-> quit()
 	}
 	else {
 		QMessageBox::warning ( this, tr( "Wrong password" ), tr( "The given password is incorrect." ));
 		m_password-> clear ( );
 	}
 }
diff --git a/core/opie-login/main.cpp b/core/opie-login/main.cpp
index df9451d..91610af 100644
--- a/core/opie-login/main.cpp
+++ b/core/opie-login/main.cpp
@@ -1,89 +1,171 @@
+#define _GNU_SOURCE
+
+#include <sys/types.h>
+#include <time.h>
 #include <sys/time.h>
 #include <sys/resource.h>
 #include <unistd.h>
 #include <syslog.h>
-#include <sys/types.h>
 #include <sys/wait.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <signal.h>
+#include <getopt.h>
+#include <string.h>
 
 #include <qpe/qpeapplication.h>
 #include <qpe/qcopenvelope_qws.h>
 #include <qpe/qpestyle.h>
 #include <qpe/power.h>
 
 #include <opie/odevice.h>
 
 #include <qwindowsystem_qws.h>
-#include <qfile.h>
+#include <qmessagebox.h>
+#include <qlabel.h>
+#include <qtimer.h>
 
+#include "loginapplication.h"
 #include "loginwindowimpl.h"
 #include "calibrate.h"
 
 using namespace Opie;
 
 int login_main ( int argc, char **argv );
-void sigusr1 ( int sig );
+void sigterm ( int sig );
 void exit_closelog ( );
 
+static struct option long_options [] = {
+	{ "autologin", 1, 0, 'a' },
+	{ 0, 0, 0, 0 }
+};
 
 
 int main ( int argc, char **argv )
 {
 	if ( ::geteuid ( ) != 0 ) {
 		::fprintf ( stderr, "%s can only be executed by root. (or chmod +s)", argv [0] );
 		return 1;
 	}
+	if ( ::getuid ( ) != 0 ) // qt doesn't really like SUID and
+		::setuid ( 0 );      // messes up things like config files
+
+	char *autolog = 0;
+	int c;
+	while (( c = ::getopt_long ( argc, argv, "a:", long_options, 0 )) != -1 ) {
+		switch ( c ) {
+			case 'a':
+				autolog = optarg;
+				break;
+			default:
+				::fprintf ( stderr, "Usage: %s [-a|--autologin=<user>]\n", argv [0] );
+				return 2;
+		}
+	}
 
 //	struct rlimit rl;
 //	::getrlimit ( RLIMIT_NOFILE, &rl );
 
 //	for ( unsigned int i = 0; i < rl. rlim_cur; i++ )
 //		::close ( i );
 
 	::setpgid ( 0, 0 );
 	::setsid ( );
 
-	::signal ( SIGUSR1, sigusr1 );
+	::signal ( SIGTERM, sigterm );
 
 	::openlog ( "opie-login", LOG_CONS, LOG_AUTHPRIV );
 	::atexit ( exit_closelog );
 
 	while ( true ) {
 		pid_t child = ::fork ( );
 
 		if ( child < 0 ) {
-			::syslog ( LOG_ERR, "Could not fork process" );
+			::syslog ( LOG_ERR, "Could not fork GUI process\n" );
 			break;
-
 		}
 		else if ( child > 0 ) {
 			int status = 0;
+			time_t started = ::time ( 0 );
 
 			while ( ::waitpid ( child, &status, 0 ) < 0 ) { }
+
+			if (( ::time ( 0 ) - started ) < 3 ) {
+				if ( autolog ) {
+					::syslog ( LOG_ERR, "Respawning too fast -- disabling auto-login\n" );
+					autolog = 0;
+				}
+				else {
+					::syslog ( LOG_ERR, "Respawning too fast -- going down\n" );
+					break;
+				}
+			}
+			int killedbysig = 0;
+
+			if ( WIFSIGNALED( status )) {
+				switch ( WTERMSIG( status )) {
+					case SIGINT :
+					case SIGTERM:
+					case SIGKILL:
+						break;
+
+					default     :
+						killedbysig = WTERMSIG( status );
+						break;
+				}
+			}
+			if ( killedbysig ) {  // qpe was killed by an uncaught signal
+				qApp = 0;
+
+				QWSServer::setDesktopBackground ( QImage ( ));
+				QApplication *app = new QApplication ( argc, argv, QApplication::GuiServer );
+				app-> setFont ( QFont ( "Helvetica", 10 ));
+				app-> setStyle ( new QPEStyle ( ));
+
+				const char *sig = ::strsignal ( killedbysig );
+				QLabel *l = new QLabel ( 0, "sig", Qt::WStyle_Customize | Qt::WStyle_NoBorder | Qt::WStyle_Tool );
+				l-> setText ( LoginWindowImpl::tr( "OPIE was terminated\nby an uncaught signal\n(%1)\n" ). arg ( sig ));
+				l-> setAlignment ( Qt::AlignCenter );
+				l-> move ( 0, 0 );
+				l-> resize ( app-> desktop ( )-> width ( ), app-> desktop ( )-> height ( ));
+				l-> show ( );
+				QTimer::singleShot ( 3000, app, SLOT( quit ( )));
+				app-> exec ( );
+				delete app;
+				qApp = 0;
+			}
 		}
 		else {
-			::exit ( login_main ( argc, argv ));
+			if ( autolog ) {
+				LoginApplication::setLoginAs ( autolog );
+
+				if ( LoginApplication::changeIdentity ( ))
+					::exit ( LoginApplication::login ( ));
+				else
+					::exit ( 0 );
+			}
+			else
+				::exit ( login_main ( argc, argv ));
 		}
 	}
 	return 0;
 }
 
-void sigusr1 ( int /*sig*/ )
+void sigterm ( int /*sig*/ )
 {
 	::exit ( 0 );
 }
 
+
 void exit_closelog ( )
 {
 	::closelog ( );
 }
 
 
 class LoginScreenSaver : public QWSScreenSaver
 {
 public:
   LoginScreenSaver ( )
   {
     m_lcd_status = true;
@@ -172,50 +254,66 @@ public:
     m_backlight_bright = bright;
   }
 
 private:
   bool m_lcd_status;
 
   int m_backlight_bright;
   bool m_backlight_forcedoff;
 };
 
 
 
+
 int login_main ( int argc, char **argv )
 {
 	QWSServer::setDesktopBackground( QImage() );
-	QPEApplication app ( argc, argv, QApplication::GuiServer );
+	LoginApplication *app = new LoginApplication ( argc, argv );
 
-	app. setFont ( QFont ( "Helvetica", 10 ));
-	app. setStyle ( new QPEStyle ( ));
+	app-> setFont ( QFont ( "Helvetica", 10 ));
+	app-> setStyle ( new QPEStyle ( ));
 
 	ODevice::inst ( )-> setSoftSuspend ( true );
 
 #if defined(QT_QWS_CASSIOPEIA) || defined(QT_QWS_IPAQ) || defined(QT_QWS_EBX)
 	if ( !QFile::exists ( "/etc/pointercal" )) {
 		// Make sure calibration widget starts on top.
 		Calibrate *cal = new Calibrate;
 		cal-> exec ( );
 		delete cal;
 	}
 #endif
 
 	LoginScreenSaver *saver = new LoginScreenSaver;
 
 	saver-> setIntervals ( );
 	QWSServer::setScreenSaver ( saver );
 	saver-> restore ( );
 
 
 	LoginWindowImpl *lw = new LoginWindowImpl ( );
-	app. setMainWidget ( lw );
-	lw-> setGeometry ( 0, 0, app. desktop ( )-> width ( ), app. desktop ( )-> height ( ));
+	app-> setMainWidget ( lw );
+	lw-> setGeometry ( 0, 0, app-> desktop ( )-> width ( ), app-> desktop ( )-> height ( ));
 	lw-> show ( );
 
-	int rc = app. exec ( );
+	int rc = app-> exec ( );
 
 	ODevice::inst ( )-> setSoftSuspend ( false );
 
+	if ( app-> loginAs ( )) {
+		if ( app-> changeIdentity ( )) {
+			app-> login ( );
+
+			// if login succeeds, it never comes back
+
+			QMessageBox::critical ( 0, LoginWindowImpl::tr( "Failure" ), LoginWindowImpl::tr( "Could not start OPIE." ));
+			rc = 1;
+		}
+		else {
+			QMessageBox::critical ( 0, LoginWindowImpl::tr( "Failure" ), LoginWindowImpl::tr( "Could not switch to new user identity" ));
+			rc = 2;
+		}
+
+	}
 	return rc;
 }
 
diff --git a/core/opie-login/opie-login.pro b/core/opie-login/opie-login.pro
index 35c1ed0..45b9a7a 100644
--- a/core/opie-login/opie-login.pro
+++ b/core/opie-login/opie-login.pro
@@ -1,20 +1,22 @@
 TEMPLATE    = app
 CONFIG      = qt warn_on debug usepam
 
 HEADERS     = loginwindowimpl.h \
+              loginapplication.h \
               ../launcher/inputmethods.h \
               ../apps/calibrate/calibrate.h
 
 SOURCES     = loginwindowimpl.cpp \
+              loginapplication.cpp \
               ../launcher/inputmethods.cpp \
               ../apps/calibrate/calibrate.cpp \
               main.cpp
 
 INTERFACES  = loginwindow.ui
 
 INCLUDEPATH += $(OPIEDIR)/include ../launcher ../apps/calibrate
 DEPENDPATH  += $(OPIEDIR)/include ../launcher ../apps/calibrate
 
 LIBS        += -lqpe -lopie
 
 usepam:LIBS += -lpam