request about scp command (QProcess) using qt
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@hlowd Please format your code properly, it is hard to read.
How does the command look exactly?
Keep in mind that you have to pass the executable and its parameters as extra parameters to QProcess::start as shown in documentation. And please add error handling to see what goes wrong.
Another comment: you're doing readAll() just after executing the command. This is not going to work. Either use waitForReadyRead or (better) connect a slot to readyRead signal and call readAll there. -
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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 -
