request about scp command (QProcess) using qt
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@hlowd said in request about scp command (QProcess) using qt:
In the actual code, I entered two backslashes
Please post real code you're using to avoid such confusion.
"Only the scp command did not work" - so does it work now or not?
Did you add error handling as suggested? -
This is the original source code.
What's wrong?ps) I added two backslashes to the content, but only one is visible.
//-----------------------------------
// header
//-----------------------------------
#ifndef MAINWINDOW_H
#define MAINWINDOW_H#include <QMainWindow>
#include <QProcess>QT_BEGIN_NAMESPACE
namespace Ui { class MainWindow; }
QT_END_NAMESPACEclass MainWindow : public QMainWindow
{
Q_OBJECTpublic:
MainWindow(QWidget *parent = nullptr);
~MainWindow();
QProcess *m_process;private slots:
void on_pushButton_clicked();
void readOutput();private:
Ui::MainWindow *ui;
};
#endif // MAINWINDOW_H//----------------------------------------
//cpp
//-----------------------------------------
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <qDebug>MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
, ui(new Ui::MainWindow)
{
ui->setupUi(this);
}MainWindow::~MainWindow()
{
delete ui;
}void MainWindow::on_pushButton_clicked()
{
m_process = new QProcess(this);
QStringList listArguments;#if 0
QString strParam = "scp";
listArguments << "D:\SVN\Work\test\a.ini user@192.168.1.250:\home\user\SW\";
#else
QString strParam = "ipconfig";
listArguments << "/all";
#endif
connect(m_process, SIGNAL(readyReadStandardError()), this, SLOT(readOutput()));
connect(m_process, SIGNAL(readyReadStandardOutput()), this, SLOT(readOutput()));
connect(m_process, SIGNAL(errorOccurred()), this, SLOT(readOutput()));m_process->start(strParam, listArguments); m_process->waitForFinished(); if(m_process) delete m_process;}
void MainWindow::readOutput()
{
QString StdOut = m_process->readAllStandardOutput();
QString StdError = m_process->readAllStandardError();
QString StdError1 = m_process->errorString();
qDebug() << "======================================\n";
qDebug() << StdOut;
qDebug() << StdError;
qDebug() << StdError1;
qDebug() << "======================================\n";
} -
@hlowd said in request about scp command (QProcess) using qt:
listArguments << "D:\SVN\Work\test\a.ini user@192.168.1.250:\home\user\SW";
Is this really your real code?!
You again have single back-slashes.
And why do you use back-slashes for paths on Linux side?
Also that line should be:listArguments << "D:\\SVN\\Work\\test\\a.ini" << "user@192.168.1.250:/home/user/SW/";And please format you code properly.
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@hlowd said in request about scp command (QProcess) using qt:
I entered two words in the post, but only one is displayed on the screen...
Use code tags properly, then it will be shown correctly
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@hlowd said in request about scp command (QProcess) using qt:
but the readOutput function is not called
Probably because you're deleting m_process right after waitForFinished.
Are you sure scp.exe command is found?
Try with an absolute path to scp.exe to make sure it is actually found. -
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@hlowd
There are files in that path.C:\Windows\WinSxS\amd64_openssh-common-components-onecore_31bf3856ad364e35_10.0.22621.1_none_1e3c4880a37d88bb scp.exe ssh-add.exe ssh-agent.exe ssh-keygen.exe// new code
QString strParam = "C:\\Windows\\WinSxS\\amd64_openssh-common-components-onecore_31bf3856ad364e35_10.0.22621.1_none_1e3c4880a37d88bb\\scp.exe";// error message
"CreateProcessW failed error:2 posix_spawn: No such file or directory" -
@hlowd
If you want help on this, at least for my part, please make the effort to enclose your code blocks and literal extracts in the forums block quotes (</>button) as we have asked several times. It does not require much effort on your side.By now you should be trying a command of
scp, nothing else, no arguments, to verify that (a) it is found and can be run and (b) you can successfully read any output from it, e.g. presumably a "usage" message in this case. -
@hlowd said in request about scp command (QProcess) using qt:
Can I do it this way?
Yes, just try.
I would also execute scp using this absolute path in a terminal to make sure it works. -
There are files in that path.
C:\Windows\WinSxS\amd64_openssh-common-components-onecore_31bf3856ad364e35_10.0.22621.1_none_1e3c4880a37d88bb scp.exe ssh-add.exe ssh-agent.exe ssh-keygen.exe// new code
QString strParam = "C:\\Windows\\WinSxS\\amd64_openssh-common-components-onecore_31bf3856ad364e35_10.0.22621.1_none_1e3c4880a37d88bb\\scp.exe";// error message
"CreateProcessW failed error:2 posix_spawn: No such file or directory"The same error occurs in the command prompt.
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@hlowd Did scp executable ever work for you in terminal? The path where it is located looks strange, don't know from where it comes. On my machine I have it here: c:\windows\System32\OpenSSH\scp.exe
You can check where your scp.exe is located using this command:
where scp -
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@hlowd said in request about scp command (QProcess) using qt:
The scp.exe file exists in that path
Does it work with this path?
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@hlowd
This really should not be too difficult to diagnose, if you stick to what is suggested and report behaviour.First try both of
scp \full\path\to\scpin a Command Prompt. I assume at least one "works", and produces a "usage" output message?
Whichever produces the message, now try from a Qt program
QProcess proc; proc.start("....."); // here try whichever worked in Command Prompt qDebug() << proc.waitForFinished(); qDebug() << proc.readAll();and report output.
