| -rw-r--r-- | core/symlinker/main.cpp | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/core/symlinker/main.cpp b/core/symlinker/main.cpp new file mode 100644 index 0000000..73d5166 --- a/dev/null +++ b/core/symlinker/main.cpp @@ -0,0 +1,160 @@ +#include <qapplication.h> +#include <qfile.h> +#include <qfileinfo.h> +#include <qdir.h> +#include <qtextstream.h> +#include <qstringlist.h> + +#include <stdlib.h> +#include <unistd.h> //symlink() +#include <sys/stat.h> // mkdir() + +#include <sys/vfs.h> +#include <mntent.h> + +static const char *listDir = "/usr/lib/ipkg/externinfo/"; + +static void createSymlinks( const QString &location, const QString &package ) +{ + QFile inFile( location + "/usr/lib/ipkg/info/" + package + ".list" ); + mkdir( "/usr/lib/ipkg", 0777 ); + mkdir( listDir, 0777 ); + + QFile outFile( listDir + package + ".list"); + + //qDebug( "createSymlinks %s -> %s", inFile.name().ascii(), outFile.name().ascii() ); + + + + if ( inFile.open(IO_ReadOnly) && outFile.open(IO_WriteOnly)) { + QTextStream in(&inFile); + QTextStream out(&outFile); + + QString s; + while ( !in.eof() ) { // until end of file... + s = in.readLine(); // line of text excluding '\n' + //qDebug( "Read: %s", s.ascii() ); + // for s, do link/mkdir. + if ( s.right(1) == "/" ) { + //qDebug("do mkdir for %s", s.ascii()); + mkdir( s.ascii(), 0777 ); + //possible optimization: symlink directories + //that don't exist already. -- Risky. + } else { + //qDebug("do symlink for %s", s.ascii()); + QFileInfo ffi( s ); + //Don't try to symlink if a regular file exists already + if ( !ffi.exists() || ffi.isSymLink() ) { + symlink( (location+s).ascii(), s.ascii() ); +// qDebug ( "Created %s" ,s.ascii() ); + out << s << "\n"; + } //else { + // qDebug( "%s exists already, not symlinked", s.ascii() ); +// } + } + } + inFile.close(); + outFile.close(); + } +} + + + +static void removeSymlinks( const QString &package ) +{ + QFile inFile( listDir + package + ".list" ); + + if ( inFile.open(IO_ReadOnly) ) { + QTextStream in(&inFile); + + QString s; + while ( !in.eof() ) { // until end of file... + s = in.readLine(); // line of text excluding '\n' + //qDebug("remove symlink %s", s.ascii()); + QFileInfo ffi( s ); + //Confirm that it's still a symlink. + if ( ffi.isSymLink() ) + unlink( s.ascii() ); +// qDebug ( "Removed %s", s.ascii() ); +// else +// qDebug( "Not removed %s", s.ascii() ); + } + inFile.close(); + inFile.remove(); + } +} + + + +/* + Slightly hacky: we can't use StorageInfo, since we don't have a + QApplication. We look for filesystems that have the directory + /usr/lib/ipkg/info, and assume that they are removable media + with packages installed. This is safe even if eg. /usr is on a + separate filesystem, since then we would be testing for + /usr/usr/lib/ipkg/info, which should not exist. (And if it + does they deserve to have it treated as removable.) + */ + +static void updateSymlinks() +{ + QDir lists( listDir ); + QStringList knownPackages = lists.entryList( "*.list" ); // No tr + + struct mntent *me; + FILE *mntfp = setmntent( "/etc/mtab", "r" ); + + if ( mntfp ) { + while ( (me = getmntent( mntfp )) != 0 ) { + QString root = me->mnt_dir; + if ( root == "/" ) + continue; + + QString info = root + "/usr/lib/ipkg/info"; + QDir infoDir( info ); + //qDebug( "looking at %s", info.ascii() ); + if ( infoDir.isReadable() ) { + const QFileInfoList *packages = infoDir.entryInfoList( "*.list" ); // No tr + QFileInfoListIterator it( *packages ); + QFileInfo *fi; + while (( fi = *it )) { + ++it; + if ( knownPackages.contains( fi->fileName() ) ) { + //qDebug( "found %s and we've seen it before", fi->fileName().latin1() ); + knownPackages.remove( fi->fileName() ); + } else { + //it's a new one + createSymlinks( root, fi->baseName() ); + } + + } + + } + } + endmntent( mntfp ); + } + + for ( QStringList::Iterator it = knownPackages.begin(); + it != knownPackages.end(); ++it ) { + // strip ".info" off the end. + removeSymlinks( (*it).left((*it).length()-5) ); + } +} + + + +int main( int argc, char *argv[] ) +{ + QApplication a( argc, argv, QApplication::Tty ); + + QString command = argc > 1 ? argv[1] : "update"; // No tr + + if ( command == "update" ) // No tr + updateSymlinks(); + else if ( command == "create" && argc > 3 ) // No tr + createSymlinks( argv[2], argv[3] ); + else if ( command == "remove" && argc > 2 ) // No tr + removeSymlinks( argv[2] ); + else + qWarning( "Argument error" ); +} |