Opie login becomes useable now:

 - pre- and post-session scripts (in $OPIEDIR/share/opie-login) to fix
   things like device ownership to user/root
 - logging in now doesn't simply mean: execute bin/qpe. instead opie-login
    * first tries to execute ~/.opie-session
    * if that doesn't exist $OPIEDIR/share/opie-login/opie-session
    * if that fails too, execute $OPIEDIR/bin/qpe
   you can now handle things like ssh-agent on a per-user basis.
(I'll commit the scripts later - for now it simply works like before)

3 files changed, 81 insertions, 9 deletions

diff --git a/core/opie-login/loginapplication.cpp b/core/opie-login/loginapplication.cpp
index 8d86a71..1facf2d 100644
--- a/core/opie-login/loginapplication.cpp
+++ b/core/opie-login/loginapplication.cpp
@@ -9,48 +9,50 @@
  - .   .-<_>     .<>         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>
+#include <sys/stat.h>
+#include <sys/wait.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, pid_t parentpid )
 	: QPEApplication ( argc, argv, GuiServer )
 {
 	lApp = this;
 	m_parentpid = parentpid;
 }
 
 const char *LoginApplication::s_username = 0;
 
 #ifdef USEPAM
@@ -137,77 +139,135 @@ bool LoginApplication::checkPassword ( const char *user, const char *pass )
 	}
 	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;
 
+	// we are still root at this point - try to run the pre-session script
+	if ( !runRootScript ( "OPIEDIR", "share/opie-login/pre-session", s_username ))
+		qWarning ( "failed to run $OPIEDIR/share/opie-login/pre-session" );
+
 	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];
+	execUserScript ( "HOME", ".opie-session" );
+	execUserScript ( "OPIEDIR", "share/opie-login/opie-session" );
+	execUserScript ( "OPIEDIR", "bin/qpe" );
 
-	::strcpy ( arg, opie );
-	::strcat ( arg, "/bin/qpe" );
+	qWarning ( "failed to start an Opie session" );
+	return false;
+}
 
-	// start qpe via a login shell
-	::execl ( "/bin/sh", "-sh", "-c", arg, 0 );
+void LoginApplication::logout ( )
+{
+	// we are now root again - try to run the post-session script
+	if ( !runRootScript ( "OPIEDIR", "share/opie-login/post-session" ))
+		qWarning ( "failed to run $OPIEDIR/scripts/post-session" );	
+}
 
-	return false;
+
+static char *buildarg ( const char *base, const char *script )
+{
+	const char *dir = base ? ::getenv ( base ) : "/";
+	char *arg = new char [::strlen ( dir ) + ::strlen ( script ) + 2];
+
+	::strcpy ( arg, dir );
+	::strcat ( arg, "/" );
+	::strcat ( arg, script );
+
+	return arg;
+}
+
+bool LoginApplication::runRootScript ( const char *base, const char *script, const char *param )
+{
+	bool res = false;
+	char *arg = buildarg ( base, script );
+
+	struct stat st;
+	if (( ::stat ( arg, &st ) == 0 ) && ( st. st_uid == 0 )) {
+		pid_t child = ::fork ( );	
+		
+		if ( child == 0 ) {
+			::execl ( "/bin/sh", "-sh", arg, param, 0 );
+			::_exit ( -1 );
+		}
+		else if ( child > 0 ) {
+			int status = 0;
+		
+			while ( ::waitpid ( child, &status, 0 ) < 0 ) { }
+			res = ( WIFEXITED( status )) && ( WEXITSTATUS( status ) == 0 );
+		}
+	}
+		
+	delete [] arg;
+	return res;
+}
+
+void LoginApplication::execUserScript ( const char *base, const char *script )
+{
+	char *arg = buildarg ( base, script );
+
+	struct stat st;
+	if ( ::stat ( arg, &st ) == 0 ) {
+		if ( st. st_mode & S_IXUSR )
+			::execl ( "/bin/sh", "-sh", "-c", arg, 0 );
+		else
+			::execl ( "/bin/sh", "-sh", arg, 0 );
+	}
 }
 
 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 ( );
 
diff --git a/core/opie-login/loginapplication.h b/core/opie-login/loginapplication.h
index 4e7cf79..d8264ea 100644
--- a/core/opie-login/loginapplication.h
+++ b/core/opie-login/loginapplication.h
@@ -7,64 +7,68 @@
 :`=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 <sys/types.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, 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 void logout ( );
 
 	static QStringList allUsers ( );
 
 	void quitToConsole ( );
 
+	static bool runRootScript ( const char *base, const char *script, const char *param = 0 );
+	static void execUserScript ( const char *base, const char *script );
+
 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 674829d..81f4d1e 100644
--- a/core/opie-login/main.cpp
+++ b/core/opie-login/main.cpp
@@ -41,135 +41,140 @@
 #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, pid_t ppid );
 void sigterm ( int sig );
+void sigint ( 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 );
+	::signal ( SIGINT, 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 ) { }
 
+			LoginApplication::logout ( );
+
 			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;
 
+				::syslog ( LOG_ERR, "Opie was killed by a signal #%d", killedbysig );
+
 				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" );
 				
@@ -282,55 +287,58 @@ public:
     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;
 };
 
 
+namespace Opie { extern int force_appearance; }  // HACK to get around the force-style setting
 
 
 int login_main ( int argc, char **argv, pid_t ppid )
 {
 	QWSServer::setDesktopBackground( QImage() );
 	LoginApplication *app = new LoginApplication ( argc, argv, ppid );
 
+	Opie::force_appearance = 0;
+
 	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 ( ));