QDir & QFileInfo information

qdirsample.cpp

/* QFileInfo:
 * http://doc.qt.io/qt-5/qfileinfo.html
 * QDir:
 * http://doc.qt.io/qt-5/qdir.html
 */

#include <QCoreApplication>
#include <QDebug>
#include <QDir>
#include <QFile>
#include <QDateTime>
#include <QFileDevice>
#include <QJsonObject>


#define DIRPATH "/Users/foo/foo2/foodirpath"


void ls(QDir & d){
    
    qDebug()<<"QString	absolutePath() const:"<<d.absolutePath();
    qDebug()<<"QString	canonicalPath() const:"<<d.canonicalPath();
    qDebug()<<"uint	count() const:"<<d.count();
    qDebug()<<"QString	dirName() const:"<<d.dirName();
    qDebug()<<"bool exists() const:"<<d.exists();
    qDebug()<<"bool	isAbsolute() const:"<<d.isAbsolute();
    qDebug()<<"bool	isReadable() const:"<<d.isReadable();
    qDebug()<<"bool	isRelative() const:"<<d.isRelative();
    qDebug()<<"bool	isRoot() const:"<<d.isRoot();
    
        
    
    
    /*
    */
    
    qDebug() <<"--- Regular ls: QStringList	entryList(const QStringList &nameFilters, Filters filters = NoFilter, SortFlags sort = NoSort) const ---";
    QStringList listDir = d.entryList();
    auto display0 = [&listDir](){for(QStringList::const_iterator i = listDir.begin();i!=listDir.end();++i){qDebug()<<"--- "<<*i;}};
    display0();    
 
    qDebug() <<"--- Filtered ls (c*): QStringList	entryList(Filters filters = NoFilter, SortFlags sort = NoSort) const ---";
    QStringList nfltrs;
    nfltrs << "c*";
    d.setNameFilters(nfltrs);
    qDebug() <<"Filters QDir::filter() const:"<<d.filter();
    listDir = d.entryList(nfltrs);
    display0();
    

    /*QFileInfoList	entryInfoList(const QStringList &nameFilters, Filters filters = NoFilter, SortFlags sort = NoSort) const
    QFileInfoList	entryInfoList(Filters filters = NoFilter, SortFlags sort = NoSort) const
    */
    QFileInfoList fil = d.entryInfoList();
    auto display1 = [&fil](){
        QList<QFileInfo>::const_iterator i;
        for(i = fil.begin(); 
            i!=fil.end();
            ++i){
            QFileInfo info = *i;
            qDebug()<<"**********************************************";
            qDebug()<<"QDir absoluteDir() const: "<<info.absoluteDir();
            qDebug()<<"QString	absoluteFilePath() const: "<<info.absoluteFilePath();
            qDebug()<<"QString	absolutePath() const: "<<info.absolutePath();
            qDebug()<<"QString	baseName() const: "<<info.baseName();
            qDebug()<<"QString	bundleName() const: "<<info.bundleName();
            qDebug()<<"bool	caching() const: "<<info.caching();
            qDebug()<<"QString	canonicalFilePath() const: "<<info.canonicalFilePath();
            qDebug()<<"QString	canonicalPath() const: "<<info.canonicalPath();
            qDebug()<<"QString	completeBaseName() const: "<<info.completeBaseName();
            qDebug()<<"QString	completeSuffix() const: "<<info.completeSuffix();
            qDebug()<<"QDateTime	created() const: "<<info.created();
            qDebug()<<"QDir	dir() const: "<<info.dir();
            qDebug()<<"bool	exists() const: "<<info.exists();
            qDebug()<<"QString	fileName() const: "<<info.fileName();
            qDebug()<<"QString	filePath() const: "<<info.filePath();
            qDebug()<<"QString	group() const: "<<info.group();
            qDebug()<<"uint	groupId() const: "<<info.groupId();
            qDebug()<<"bool	isAbsolute() const: "<<info.isAbsolute();
            qDebug()<<"bool	isBundle() const: "<<info.isBundle();
            qDebug()<<"bool	isDir() const: "<<info.isDir();
            qDebug()<<"bool	isExecutable() const: "<<info.isExecutable();
            qDebug()<<"bool	isFile() const: "<<info.isFile();
            qDebug()<<"bool	isHidden() const: "<<info.isHidden();
            qDebug()<<"bool	isNativePath() const :"<<info.isNativePath();
            qDebug()<<"bool	isReadable() const :"<<info.isReadable();
            qDebug()<<"bool	isRelative() const :"<<info.isRelative();
            qDebug()<<"bool	isRoot() const :"<<info.isRoot();
            qDebug()<<"bool	isSymLink() const :"<<info.isSymLink();
            qDebug()<<"bool	isWritable() const :"<<info.isWritable();
            qDebug()<<"QDateTime	lastModified() const :"<<info.lastModified();
            qDebug()<<"QDateTime	lastRead() const :"<<info.lastRead();
            //qDebug()<<"bool	makeAbsolute() :"<<info.
            qDebug()<<"QString	owner() const :"<<info.owner();
            qDebug()<<"uint	ownerId() const :"<<info.ownerId();
            qDebug()<<"QString	path() const :"<<info.path();
            //qDebug()<<"bool	permission(QFile::Permissions permissions) const :"<<info.
            QFile::Permissions p = info.permissions();
            
            QString ps  = QString(p.testFlag(QFileDevice::ReadUser) ?"r":"-");
            ps          +=QString(p.testFlag(QFileDevice::WriteUser) ?"w":"-");
            ps          +=QString(p.testFlag(QFileDevice::ExeUser) ?"x":"-");
            ps          += QString(p.testFlag(QFileDevice::ReadGroup) ?"r":"-");
            ps          +=QString(p.testFlag(QFileDevice::WriteGroup) ?"w":"-");
            ps          +=QString(p.testFlag(QFileDevice::ExeGroup) ?"x":"-");
            ps          += QString(p.testFlag(QFileDevice::ReadOwner) ?"r":"-");
            ps          +=QString(p.testFlag(QFileDevice::WriteOwner) ?"w":"-");
            ps          +=QString(p.testFlag(QFileDevice::ExeOwner ) ?"x":"-");
            
            
            qDebug()<<"Permissions: "<<ps;
            qDebug()<<"**********************************************";
            
        }
    };
    display1();
}

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
    
    
    QDir d(DIRPATH);
    
    qDebug()<<DIRPATH<<" exists: "<<d.exists();
    ls(d);
    
    return a.exec();

}

This code shows how to manipulate QDir and QFileInfo objects.