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.