Fix for bug #913 - added periodic qApp->processEvents() while updating ipkg status file to improve UI responsiveness

1 files changed, 11 insertions, 0 deletions

diff --git a/noncore/settings/aqpkg/ipkg.cpp b/noncore/settings/aqpkg/ipkg.cpp
index 08ae386..3df569b 100644
--- a/noncore/settings/aqpkg/ipkg.cpp
+++ b/noncore/settings/aqpkg/ipkg.cpp
@@ -1,587 +1,598 @@
 /*
                              This file is part of the OPIE Project
                              
                =.            Copyright (c)  2002 Andy Qua <andy.qua@blueyonder.co.uk>
              .=l.                                Dan Williams <drw@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 <fstream>
 #include <iostream>
 #include <vector>
 using namespace std;
 
 #include <stdio.h>
 #include <unistd.h>
 
 #ifdef QWS
 #include <qpe/qpeapplication.h>
 #else
 #include <qapplication.h>
 #endif
 #include <qdir.h>
 #include <qtextstream.h>
 
 #include <opie/oprocess.h>
 
 #include "utils.h"
 #include "ipkg.h"
 #include "global.h"
 
 Ipkg :: Ipkg()
 {
     proc = 0;
 }
 
 Ipkg :: ~Ipkg()
 {
 }
 
 // Option is what we are going to do - install, upgrade, download, reinstall
 // package is the package name to install - either a fully qualified path and ipk
 //   file (if stored locally) or just the name of the package (for a network package)
 // packageName is the package name - (for a network package this will be the same as
 //    package parameter)
 // dest is the destination alias (from ipk.conf)
 // destDir is the dir that the destination alias points to (used to link to root)
 // flags is the ipkg options flags
 // dir is the directory to run ipkg in (defaults to "")
 void Ipkg :: runIpkg()
 {
     error = false;
     QStringList commands;
 
     QDir::setCurrent( "/tmp" );
 
     if ( runtimeDir != "" )
     {
         commands << "cd ";
         commands << runtimeDir;
         commands << ";";
     }
     commands << "ipkg" << "-V" << QString::number( infoLevel ) << "-force-defaults";
 
     // only set the destination for an install operation
     if ( option == "install" )
         commands << "-dest" << destination;
 
 
     if ( option != "update" && option != "download" )
     {
         if ( flags & FORCE_DEPENDS )
             commands << "-force-depends";
         if ( flags & FORCE_REINSTALL  )
             commands << "-force-reinstall";
         if ( flags & FORCE_REMOVE )
             commands << "-force-removal-of-essential-packages";
         if ( flags & FORCE_OVERWRITE )
             commands << "-force-overwrite";
         if ( infoLevel == 3 )
             commands << "-verbose_wget";
 
         // Handle make links
         // Rules - If make links is switched on, create links to root
         // if destDir is NOT /
         if ( flags & MAKE_LINKS )
         {
             // If destDir == / turn off make links as package is being insalled
             // to root already.
             if ( destDir == "/" )
                 flags ^= MAKE_LINKS;
         }
     }
     
 #ifdef X86
     commands << "-f";
     commands << IPKG_CONF;
 #endif
 
 
     if ( option == "reinstall" )
         commands << "install";
     else
         commands << option;
     if ( package != "" )
         commands << package;
 
 
     if ( package != "" )
         emit outputText( QString( "Dealing with package " ) + package );
 
     qApp->processEvents();
 
     // If we are removing, reinstalling or upgrading packages and make links option is selected
     // create the links
     if ( option == "remove" || option == "reinstall" || option == "upgrade" )
     {
         createLinks = false;
         if ( flags & MAKE_LINKS )
         {
             emit outputText( QString( "Removing symbolic links...\n" ) );
             linkPackage( Utils::getPackageNameFromIpkFilename( package ), destination, destDir );
             emit outputText( QString( " " ) );
         }
     }
     
     // Execute command
     dependantPackages = new QList<QString>;
     dependantPackages->setAutoDelete( true );
 
     executeIpkgCommand( commands, option );
 
 }
 
 void Ipkg :: createSymLinks()
 {
     if ( option == "install" || option == "reinstall" || option == "upgrade" )
     {
         // If we are not removing packages and make links option is selected
         // create the links
         createLinks = true;
         if ( flags & MAKE_LINKS )
         {
             emit outputText( " " );
             emit outputText( QString( "Creating symbolic links for " )+ package );
 
             linkPackage( Utils::getPackageNameFromIpkFilename( package ), destination, destDir );
 
             // link dependant packages that were installed with this release
             QString *pkg;
             for ( pkg = dependantPackages->first(); pkg != 0; pkg = dependantPackages->next() )
             {
                 if ( *pkg == package )
                     continue;
                 emit outputText( " " );
                 emit outputText( QString( "Creating symbolic links for " )+ (*pkg) );
                 linkPackage( Utils::getPackageNameFromIpkFilename( *pkg ), destination, destDir );
             }
         }
     }
 
     delete dependantPackages;
 
     emit outputText( "Finished" );
     emit outputText( "" );
 }
 
 void Ipkg :: removeStatusEntry()
 {
     QString statusFile = destDir;
     if ( statusFile.right( 1 ) != "/" )
         statusFile.append( "/" );
     statusFile.append( "usr/lib/ipkg/status" );
     QString outStatusFile = statusFile;
     outStatusFile.append( ".tmp" );
 
     emit outputText( "" );
     emit outputText( "Removing status entry..." );
     QString tempstr = "status file - ";
     tempstr.append( statusFile );
     emit outputText( tempstr );
     tempstr = "package - ";
     tempstr.append( package );
     emit outputText( tempstr );
     
     ifstream in( statusFile );
     ofstream out( outStatusFile );
     if ( !in.is_open() )
     {
         tempstr = "Couldn't open status file - ";
         tempstr.append( statusFile );
         emit outputText( tempstr );
         return;
     }
 
     if ( !out.is_open() )
     {
         tempstr = "Couldn't create tempory status file - ";
         tempstr.append( outStatusFile );
         emit outputText( tempstr );
         return;
     }
 
     char line[1001];
     char k[21];
     char v[1001];
     QString key;
     QString value;
     vector<QString> lines;
+    int i = 0;
     do
     {
         in.getline( line, 1000 );
         if ( in.eof() )
             continue;
 
         k[0] = '\0';
         v[0] = '\0';
 
         sscanf( line, "%[^:]: %[^\n]", k, v );
         key = k;
         value = v;
         key = key.stripWhiteSpace();
         value = value.stripWhiteSpace();
         if ( key == "Package" && value == package )
         {
             // Ignore all lines up to next empty
             do
             {
                 in.getline( line, 1000 );
                 if ( in.eof() || QString( line ).stripWhiteSpace() == "" )
                     continue;
             } while ( !in.eof() && QString( line ).stripWhiteSpace() != "" );
         }
 
         lines.push_back( QString( line ) );
         out << line << endl;
+
+        // Improve UI responsiveness    
+        i++;
+        if ( ( i % 50 ) == 0 )
+            qApp->processEvents();
     } while ( !in.eof() );
 
     // Write lines out
     vector<QString>::iterator it;
     for ( it = lines.begin() ; it != lines.end() ; ++it )
     {
         out << (const char *)(*it) << endl;
+        
+        // Improve UI responsiveness    
+        i++;
+        if ( ( i % 50 ) == 0 )
+            qApp->processEvents();
     }
     
     in.close();
     out.close();
 
     // Remove old status file and put tmp stats file in its place
     remove( statusFile );
     rename( outStatusFile, statusFile );
 }
 
 int Ipkg :: executeIpkgCommand( QStringList &cmd, const QString /*option*/ )
 {
     // If one is already running - should never be but just to be safe
     if ( proc )
     {
         delete proc;
         proc = 0;
     }
     
     // OK we're gonna use OProcess to run this thing
     proc = new OProcess();
     aborted = false;
 
 
     // Connect up our slots
     connect(proc, SIGNAL(processExited(OProcess *)),
             this, SLOT( processFinished()));
 
     connect(proc, SIGNAL(receivedStdout(OProcess *, char *, int)),
             this, SLOT(commandStdout(OProcess *, char *, int)));
 
     connect(proc, SIGNAL(receivedStderr(OProcess *, char *, int)),
             this, SLOT(commandStderr(OProcess *, char *, int)));
     
     for ( QStringList::Iterator it = cmd.begin(); it != cmd.end(); ++it )
     {
          *proc << (*it).latin1();
     }
 
     // Start the process going
     finished = false;
     if(!proc->start(OProcess::NotifyOnExit, OProcess::All))
     {
         emit outputText( QString( "Couldn't start ipkg process" ) );
     }
 }
 
 void Ipkg::commandStdout(OProcess*, char *buffer, int buflen)
 {
     QString lineStr = buffer;
     if ( lineStr[buflen-1] == '\n' )
         buflen --;
     lineStr = lineStr.left( buflen );
     emit outputText( lineStr );
 
     // check if we are installing dependant packages
     if ( option == "install" || option == "reinstall" )
     {
         // Need to keep track of any dependant packages that get installed
         // so that we can create links to them as necessary
         if ( lineStr.startsWith( "Installing " ) )
         {
             int start = lineStr.find( " " ) + 1;
             int end = lineStr.find( " ", start );
             QString *package = new QString( lineStr.mid( start, end-start ) );
             dependantPackages->append( package );
         }
     }
     else if ( option == "remove" && !( flags & FORCE_DEPENDS ) &&
               lineStr.find( "is depended upon by packages:" ) != -1 )
     {
         // Ipkg should send this to STDERR, but doesn't - so trap here
         error = true;
     }
     
     buffer[0] = '\0';
 }
 
 void Ipkg::commandStderr(OProcess*, char *buffer, int buflen)
 {
     QString lineStr = buffer;
     if ( lineStr[buflen-1] == '\n' )
         buflen --;
     lineStr=lineStr.left( buflen );
     emit outputText( lineStr );
     buffer[0] = '\0';
     error = true;
 }
 
 void Ipkg::processFinished()
 {
     // Finally, if we are removing a package, remove its entry from the <destdir>/usr/lib/ipkg/status file
     // to workaround an ipkg bug which stops reinstall to a different location
 
     if ( !error && option == "remove" )
         removeStatusEntry();
     
     delete proc;
     proc = 0;
     finished = true;
 
 	emit ipkgFinished();
 }
 
 
 void Ipkg :: abort()
 {
     if ( proc )
     {
         proc->kill();
         aborted = true;
     }
 }
 
 /*
 int Ipkg :: executeIpkgCommand( QString &cmd, const QString option )
 {
     FILE *fp = NULL;
     char line[130];
     QString lineStr, lineStrOld;
     int ret = false;
 
     fp = popen( (const char *) cmd, "r");
     if ( fp == NULL )
     {
         QString text;
         text.sprintf( "Couldn't execute %s! See stdout for error code", (const char *)cmd );
         emit outputText( text );
     }
     else
     {
         while ( fgets( line, sizeof line, fp) != NULL )
         {
             lineStr = line;
             lineStr=lineStr.left( lineStr.length()-1 );
 
             if ( lineStr != lineStrOld )
             {
                 //See if we're finished
                 if ( option == "install" || option == "reinstall" )
                 {
                     // Need to keep track of any dependant packages that get installed
                     // so that we can create links to them as necessary
                     if ( lineStr.startsWith( "Installing " ) )
                     {
                         int start = lineStr.find( " " ) + 1;
                         int end = lineStr.find( " ", start );
                         QString *package = new QString( lineStr.mid( start, end-start ) );
                         dependantPackages->append( package );
                     }
                 }
 
                 if ( option == "update" )
                 {
                     if (lineStr.contains("Updated list"))
                         ret = true;
                 }
                 else if ( option == "download" )
                 {
                     if (lineStr.contains("Downloaded"))
                         ret = true;
                 }
                 else
                 {
                     if (lineStr.contains("Done"))
                         ret = true;
                 }
 
                 emit outputText( lineStr );
             }
             lineStrOld = lineStr;
             qApp->processEvents();
         }
         pclose(fp);
     }
 
     return ret;
 }
 */
 
 void Ipkg :: linkPackage( const QString &packFileName, const QString &dest, const QString &destDir )
 {
     if ( dest == "root" || dest == "/" )
         return;
         
     qApp->processEvents();
     QStringList *fileList = getList( packFileName, destDir );
     qApp->processEvents();
     processFileList( fileList, destDir );
     delete fileList;
 }
 
 QStringList* Ipkg :: getList( const QString &packageFilename, const QString &destDir )
 {
     QString packageFileDir = destDir;
     packageFileDir.append( "/usr/lib/ipkg/info/" );
     packageFileDir.append( packageFilename );
     packageFileDir.append( ".list" );
     QFile f( packageFileDir );
 
     if ( !f.open(IO_ReadOnly) )
     {
         // Couldn't open from dest, try from /
         f.close();
         
         packageFileDir = "/usr/lib/ipkg/info/";
         packageFileDir.append( packageFilename );
         packageFileDir.append( ".list" );
         f.setName( packageFileDir );
         if ( ! f.open(IO_ReadOnly) )
         {
             QString tempstr = "Could not open :";
             tempstr.append( packageFileDir );
             emit outputText( tempstr );
             return (QStringList*)0;
         }
     }
     QStringList *fileList = new QStringList();
     QTextStream t( &f );
     while ( !t.eof() )
         *fileList += t.readLine();
 
     f.close();
     return fileList;
 }
 
 void Ipkg :: processFileList( const QStringList *fileList, const QString &destDir )
 {
     if ( !fileList || fileList->isEmpty() )
         return;
 
     QString baseDir = ROOT;
 
     if ( createLinks == true )
     {
         for ( uint i=0; i < fileList->count(); i++ )
         {
             processLinkDir( (*fileList)[i], baseDir, destDir );
             qApp->processEvents();
         }
     }
     else
     {
         for ( int i = fileList->count()-1; i >= 0 ; i-- )
         {
             processLinkDir( (*fileList)[i], baseDir, destDir );
             qApp->processEvents();
         }
     }
 }
 
 void Ipkg :: processLinkDir( const QString &file, const QString &destDir, const QString &baseDir )
 {
 
     QString sourceFile = baseDir;
     sourceFile.append( file );
     
     QString linkFile = destDir;
     if ( file.startsWith( "/" ) && destDir.right( 1 ) == "/" )
     {
         linkFile.append( file.mid( 1 ) );
     }   
     else
     {
         linkFile.append( file );
     }
     QString text;
     if ( createLinks )
     {
         // If this file is a directory (ends with a /) and it doesn't exist,
         // we need to create it
         if ( file.right(1) == "/" )
         {
             QFileInfo f( linkFile );
             if ( !f.exists() )
             {
                 QString tempstr = "Creating directory ";
                 tempstr.append( linkFile );
                 emit outputText( tempstr );
                 QDir d;
                 d.mkdir( linkFile, true );
             }
 //            else
 //                emit outputText( QString( "Directory " ) + linkFile + " already exists" );
             
         }
         else
         {
             int rc = symlink( sourceFile, linkFile );
             text = (rc == 0 ? "Linked " : "Failed to link ");
             text.append( sourceFile );
             text.append( " to " );
             text.append( linkFile );
             emit outputText( text );
         }
     }
     else
     {
         QFileInfo f( linkFile );
         if ( f.exists() )
         {
             if ( f.isFile() )
             {
                 QFile f( linkFile );
                 bool rc = f.remove();
 
                 text = (rc ? "Removed " : "Failed to remove ");
                 text.append( linkFile );
                 emit outputText( text );
             }
             else if ( f.isDir() )
             {
                 QDir d;
                 bool rc = d.rmdir( linkFile, true );
                 if ( rc )
                 {
                     text = (rc ? "Removed " : "Failed to remove ");
                     text.append( linkFile );
                     emit outputText( text );
                 }
             }
         }
     }
 }