why file copy function not working when we use the filename containing colon ?

Qt embedded developer

i have seen that in my linux system that:

when i copy file that contain name like 1227202212:10:19

to my destination of usb pen drive it not copy the file.

srcPath : /home/raimbow/Rtime/Can/1227202212:10:40"

dstPath : /media/raimbow/4AFB-18C7/1227202212:10:40"

retValue =  QFile::copy(srcPath, dstPath);

my above function return false .

what is solution to make it work ?

JonB

@Qt-embedded-developer said in why file copy function not working when we use the filename containing colon ?:

i have found that when we are going to do copy in pen drive at that time this file copy function not working. i have checked it. if we replace destination file name's colon with '_' its works fine

Well let's start with what file system your pen drive is formatted as? For example, if it's FAT32 or NTFS then I would imagine colons may be illegal in filenames, even under Linux?

First thing is to try this outside of Qt application....

Christian Ehrlicher

Has nothing to do with colons but with your access rights or the file arealdy exists I would guess.
Works fine for me:

#include <QtCore>

int main(int argc, char **argv)
{
  QCoreApplication app(argc, argv);
  QString src = "./test:1234";
  QString dst = "./test:12345";
  if (QFile::copy(src, dst)) {
    qDebug() << "Success";
  } else {
    qDebug() << "Failed";
  }
  return 0;
}

Please create minimal, compilable examples before you post your problems here.

Qt embedded developer

@Christian-Ehrlicher

i have found that when we are going to do copy in pen drive at that time this file copy function not working. i have checked it. if we replace destination file name's colon with '_' its works fine

JonB

@Qt-embedded-developer
You/@Christian-Ehrlicher are using the static function bool QFile::copy(const QString &fileName, const QString &newName). When that files you don't get any information as to why.

I assume (untested) that if you use a the instance method bool QFile::copy(const QString &newName) then when it fails you can call QFileDevice::FileError QFileDevice::error() const on the QFile to find out why?

JonB

@Qt-embedded-developer said in why file copy function not working when we use the filename containing colon ?:

i have found that when we are going to do copy in pen drive at that time this file copy function not working. i have checked it. if we replace destination file name's colon with '_' its works fine

Well let's start with what file system your pen drive is formatted as? For example, if it's FAT32 or NTFS then I would imagine colons may be illegal in filenames, even under Linux?

First thing is to try this outside of Qt application....

Christian Ehrlicher

@JonB said in why file copy function not working when we use the filename containing colon ?:

if it's FAT32 or NTFS then I would imagine colons may be illegal

Correct

Kent-Dorfman

And herein lies why you should "never" name files with anything but alphanumeric characters, and also avoid spaces while you're at it.