How to get executable name in Qt

Question

I run a Qt application, what I want to know is this running binary file name.

score 99 · Answer 1 · edited Sep 20 '17 at 14:10

99

I must (partially) disagree with the other comments that it is not a Qt question: There is a Qt method QCoreApplication::applicationFilePath() which gives the directory+filename of the executable.

On Linux this will try to use /proc, and on Windows perhaps GetModuleFileName(). According to the docs it will fall back to argv[0].

You could then use QFileInfo to split it into an executable name and a directory.

QFileInfo(QCoreApplication::applicationFilePath()).fileName()

edited Sep 20 '17 at 14:10

Cameron

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answered Dec 23 '10 at 08:06

André

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+1. And for the application directory, you can use `QCoreApplication::applicationDirPath()`. – Cameron Jan 28 '13 at 05:03
3

I got: ``QCoreApplication::applicationFilePath: Please instantiate the QApplication object first`` – GuySoft Mar 17 '16 at 10:10
qApp->applicationFilePath(); – tvorez Oct 31 '16 at 13:42
Thanks @Cameron. Was looking for that. :D – GeneCode Sep 20 '17 at 03:23
`QApplication a(argc, argv); QString appPath = a.applicationFilePath();` – Neurotransmitter Nov 02 '17 at 19:14

score 3 · Answer 2 · edited Sep 23 '15 at 05:56

3

The Qapplication parses the commandline arguemnts, the first entry is the name of the executable - this is roughly the same as argv[0] in standard C but has a few extra complexities on windows if you have a Unicode build or if the application is started as a service

See http://doc.qt.io/qt-5/qcoreapplication.html#arguments

edited Sep 23 '15 at 05:56

Christophe Weis

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answered Dec 23 '10 at 06:16

Martin Beckett

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score -2 · Answer 3 · edited Jun 03 '14 at 08:01

-2

Again not really a Qt question. To find the name of the binary file executed it would be something like.

#include <iostream>
using namespace std;
int main(int argc, char **argv)
{
  cout << argv[0] << endl;
  return 0;
}

edited Jun 03 '14 at 08:01

NG_

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answered Dec 23 '10 at 03:53

St0ner

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I'm unsure as to why your concern about it being a Qt question is relevant. The OP is simply stating the environment they're using, no different to if they had said "Linux" or Windows" or, for that matter, "C++". It's extra information which can help target the answers. In this particular case, it's useful because Qt provides a *much* better way to get this info - as per the ISO standard, `argv[0]` is not required to actually hold *any* useful information about the executable. see http://stackoverflow.com/questions/2794150/when-can-argv0-have-null/2794171#2794171 for details. – paxdiablo Nov 08 '16 at 01:04

How to get executable name in Qt

3 Answers3

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