when quitting opie-login, don't kill the process id returned by getppid(),

but use the previously saved "real" parent pid.

3 files changed, 14 insertions, 7 deletions

diff --git a/core/opie-login/loginapplication.cpp b/core/opie-login/loginapplication.cpp
index 103d63b..8d86a71 100644
--- a/core/opie-login/loginapplication.cpp
+++ b/core/opie-login/loginapplication.cpp
@@ -1,220 +1,221 @@
 /*
                =.            This file is part of the OPIE Project
              .=l.            Copyright (c)  2002 Robert Griebl <sandman@handhelds.org>
            .>+-=
  _;:,     .>    :=|.         This file is free software; you can
 .> <`_,   >  .   <=          redistribute it and/or modify it under
 :`=1 )Y*s>-.--   :           the terms of the GNU General Public
 .="- .-=="i,     .._         License as published by the Free Software
  - .   .-<_>     .<>         Foundation; either version 2 of the License,
      ._= =}       :          or (at your option) any later version.
     .%`+i>       _;_.
     .i_,=:_.      -<s.       This file is distributed in the hope that
      +  .  -:.       =       it will be useful, but WITHOUT ANY WARRANTY;
     : ..    .:,     . . .    without even the implied warranty of
     =_        +     =;=|`    MERCHANTABILITY or FITNESS FOR A
   _.=:.       :    :=>`:     PARTICULAR PURPOSE. See the GNU General
 ..}^=.=       =       ;      Public License for more details.
 ++=   -.     .`     .:
  :     =  ...= . :.=-        You should have received a copy of the GNU
  -.   .:....=;==+<;          General Public License along with this file;
   -_. . .   )=.  =           see the file COPYING. If not, write to the
     --        :-=`           Free Software Foundation, Inc.,
                              59 Temple Place - Suite 330,
                              Boston, MA 02111-1307, USA.
 
 */
 
 #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 )
+LoginApplication::LoginApplication ( int &argc, char **argv, pid_t parentpid )
 	: QPEApplication ( argc, argv, GuiServer )
 {
 	lApp = this;
+	m_parentpid = parentpid;
 }
 
 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 );
+	::kill ( m_parentpid, SIGTERM );
 }
diff --git a/core/opie-login/loginapplication.h b/core/opie-login/loginapplication.h
index 062c088..4e7cf79 100644
--- a/core/opie-login/loginapplication.h
+++ b/core/opie-login/loginapplication.h
@@ -1,67 +1,70 @@
 /*
                =.            This file is part of the OPIE Project
              .=l.            Copyright (c)  2002 Robert Griebl <sandman@handhelds.org>
            .>+-=
  _;:,     .>    :=|.         This file is free software; you can
 .> <`_,   >  .   <=          redistribute it and/or modify it under
 :`=1 )Y*s>-.--   :           the terms of the GNU General Public
 .="- .-=="i,     .._         License as published by the Free Software
  - .   .-<_>     .<>         Foundation; either version 2 of the License,
      ._= =}       :          or (at your option) any later version.
     .%`+i>       _;_.
     .i_,=:_.      -<s.       This file is distributed in the hope that
      +  .  -:.       =       it will be useful, but WITHOUT ANY WARRANTY;
     : ..    .:,     . . .    without even the implied warranty of
     =_        +     =;=|`    MERCHANTABILITY or FITNESS FOR A
   _.=:.       :    :=>`:     PARTICULAR PURPOSE. See the GNU General
 ..}^=.=       =       ;      Public License for more details.
 ++=   -.     .`     .:
  :     =  ...= . :.=-        You should have received a copy of the GNU
  -.   .:....=;==+<;          General Public License along with this file;
   -_. . .   )=.  =           see the file COPYING. If not, write to the
     --        :-=`           Free Software Foundation, Inc.,
                              59 Temple Place - Suite 330,
                              Boston, MA 02111-1307, USA.
 
 */
 
 #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 );
+	LoginApplication ( int &argc, char **argv, pid_t parentpid );
 
 	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
+
+private:
+	pid_t m_parentpid;
 };
 
 extern LoginApplication *lApp;
 
 #endif
diff --git a/core/opie-login/main.cpp b/core/opie-login/main.cpp
index 579a93a..674829d 100644
--- a/core/opie-login/main.cpp
+++ b/core/opie-login/main.cpp
@@ -1,357 +1,360 @@
 /*
                =.            This file is part of the OPIE Project
              .=l.            Copyright (c)  2002 Robert Griebl <sandman@handhelds.org>
            .>+-=
  _;:,     .>    :=|.         This file is free software; you can
 .> <`_,   >  .   <=          redistribute it and/or modify it under
 :`=1 )Y*s>-.--   :           the terms of the GNU General Public
 .="- .-=="i,     .._         License as published by the Free Software
  - .   .-<_>     .<>         Foundation; either version 2 of the License,
      ._= =}       :          or (at your option) any later version.
     .%`+i>       _;_.
     .i_,=:_.      -<s.       This file is distributed in the hope that
      +  .  -:.       =       it will be useful, but WITHOUT ANY WARRANTY;
     : ..    .:,     . . .    without even the implied warranty of
     =_        +     =;=|`    MERCHANTABILITY or FITNESS FOR A
   _.=:.       :    :=>`:     PARTICULAR PURPOSE. See the GNU General
 ..}^=.=       =       ;      Public License for more details.
 ++=   -.     .`     .:
  :     =  ...= . :.=-        You should have received a copy of the GNU
  -.   .:....=;==+<;          General Public License along with this file;
   -_. . .   )=.  =           see the file COPYING. If not, write to the
     --        :-=`           Free Software Foundation, Inc.,
                              59 Temple Place - Suite 330,
                              Boston, MA 02111-1307, USA.
 
 */
 
 #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/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 <qpe/config.h>
 
 #include <opie/odevice.h>
 
 #include <qwindowsystem_qws.h>
 #include <qmessagebox.h>
 #include <qlabel.h>
 #include <qtimer.h>
 #include <qfile.h>
 
 #include "loginapplication.h"
 #include "loginwindowimpl.h"
 #include "calibrate.h"
 
 using namespace Opie;
 
-int login_main ( int argc, char **argv );
+int login_main ( int argc, char **argv, pid_t ppid );
 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 )
 {
+	pid_t ppid = ::getpid ( );
+
+
 	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 ( 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 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 {
 			if ( !autolog ) {
 				Config cfg ( "opie-login" );
 				cfg. setGroup ( "General" );
 				QString user = cfg. readEntry ( "AutoLogin" );
 				
 				if ( !user. isEmpty ( ))
 					autolog = ::strdup ( user. latin1 ( ));
 			}
 		
 			if ( autolog ) {
 				LoginApplication::setLoginAs ( autolog );
 
 				if ( LoginApplication::changeIdentity ( ))
 					::exit ( LoginApplication::login ( ));
 				else
 					::exit ( 0 );
 			}
 			else 
-				::exit ( login_main ( argc, argv ));
+				::exit ( login_main ( argc, argv, ppid ));
 		}
 	}
 	return 0;
 }
 
 void sigterm ( int /*sig*/ )
 {
 	::exit ( 0 );
 }
 
 
 void exit_closelog ( )
 {
 	::closelog ( );
 }
 
 
 class LoginScreenSaver : public QWSScreenSaver
 {
 public:
   LoginScreenSaver ( )
   {
     m_lcd_status = true;
 
     m_backlight_bright = -1;
     m_backlight_forcedoff = false;
 
     // Make sure the LCD is in fact on, (if opie was killed while the LCD is off it would still be off)
     ODevice::inst ( )-> setDisplayStatus ( true );
   }
   void restore()
   {
     if ( !m_lcd_status )     // We must have turned it off
       ODevice::inst ( ) -> setDisplayStatus ( true );
 
     setBacklight ( -3 );
   }
   bool save( int level )
   {
     switch ( level ) {
       case 0:
         if ( backlight() > 1 )
           setBacklight( 1 ); // lowest non-off
         return true;
         break;
       case 1:
         setBacklight( 0 ); // off
         return true;
         break;
       case 2:
         // We're going to suspend the whole machine
         if ( PowerStatusManager::readStatus().acStatus() != PowerStatus::Online ) {
           QWSServer::sendKeyEvent( 0xffff, Qt::Key_F34, FALSE, TRUE, FALSE );
           return true;
         }
         break;
     }
     return false;
   }
 
 private:
 public:
   void setIntervals( int i1 = 30, int i2 = 20, int i3 = 60 )
   {
     int v [4];
 
     v [ 0 ] = QMAX( 1000 * i1, 100 );
     v [ 1 ] = QMAX( 1000 * i2, 100 );
     v [ 2 ] = QMAX( 1000 * i3, 100 );
     v [ 3 ] = 0;
 
     if ( !i1 && !i2 && !i3 )
       QWSServer::setScreenSaverInterval ( 0 );
     else
       QWSServer::setScreenSaverIntervals ( v );
   }
 
   int backlight ( )
   {
     if ( m_backlight_bright == -1 )
       m_backlight_bright = 255;
 
     return m_backlight_bright;
   }
 
   void setBacklight ( int bright )
   {
     if ( bright == -3 ) {
       // Forced on
       m_backlight_forcedoff = false;
       bright = -1;
     }
     if ( m_backlight_forcedoff && bright != -2 )
       return ;
     if ( bright == -2 ) {
       // Toggle between off and on
       bright = m_backlight_bright ? 0 : -1;
       m_backlight_forcedoff = !bright;
     }
 
     m_backlight_bright = bright;
 
     bright = backlight ( );
     ODevice::inst ( ) -> setDisplayBrightness ( bright );
 
     m_backlight_bright = bright;
   }
 
 private:
   bool m_lcd_status;
 
   int m_backlight_bright;
   bool m_backlight_forcedoff;
 };
 
 
 
 
-int login_main ( int argc, char **argv )
+int login_main ( int argc, char **argv, pid_t ppid )
 {
 	QWSServer::setDesktopBackground( QImage() );
-	LoginApplication *app = new LoginApplication ( argc, argv );
+	LoginApplication *app = new LoginApplication ( argc, argv, ppid );
 
 	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 ( ));
 	lw-> show ( );
 
 	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;
 }