How to set ip address to a computer in Qt (Solved)

[p3c0]

AFAIK, You will have to either run the Qt program as root or you can provide a password file to sudo eg.
@
sudo -S ifconfig eth0 192.168.100.4 < /home/user/passwd.txt
@

(but beware of security risks)

[jafarabadi.qt]

[quote author="p3c0" date="1415858672"]AFAIK, You will have to either run the Qt program as root or you can provide a password file to sudo eg.
@
sudo -S ifconfig eth0 192.168.100.4 < /home/user/passwd.txt
@

(but beware of security risks)[/quote]

Hi
Thanks it's very useful command.
i use from QProcess too
read Standard Outputs and ...

[houmingc]

Seeking help again. My Ubuntu terminal does open, but nothing is wrote onto it. why is it so?

@
QProcess *myProcess = new QProcess;
myProcess->start("gnome-terminal");
myProcess->waitForStarted(5000);
myProcess->write("Qt rocks");
myProcess->write("sudo -S ifconfig eth0 192.168.100.4 netmask 255.255.255.0");

@

[houmingc]

Seeking help again. My Ubuntu terminal does open, but nothing is wrote onto it. why is it so?

@
QProcess *myProcess = new QProcess;
myProcess->start("gnome-terminal");
myProcess->waitForStarted(5000);
myProcess->write("Qt rocks");
myProcess->write("sudo -S ifconfig eth0 192.168.100.4 netmask 255.255.255.0");

@

[p3c0]

You need not open a terminal for launching that process. Try following:
@
QStringList args;
args << "-c" << "sudo -S ifconfig eth0 192.168.0.21 < /home/user/passwd.txt";
pro->start("/bin/sh",args);
@

But as said earlier it doesnot provide security as the password file is revealed.
Another way would be to write a script which will run ifconfig command. Call this script instead of that command. Add an entry for this script in /etc/sudoers alongwith the user that will execute this script (i.e linux user with which you run your application). There are plenty of examples on how to edit sudoers using visudo. Check them out.

[p3c0]

You need not open a terminal for launching that process. Try following:
@
QStringList args;
args << "-c" << "sudo -S ifconfig eth0 192.168.0.21 < /home/user/passwd.txt";
pro->start("/bin/sh",args);
@

But as said earlier it doesnot provide security as the password file is revealed.
Another way would be to write a script which will run ifconfig command. Call this script instead of that command. Add an entry for this script in /etc/sudoers alongwith the user that will execute this script (i.e linux user with which you run your application). There are plenty of examples on how to edit sudoers using visudo. Check them out.

[houmingc]

i vi a file in /home/ubuntu/passwd.txt with my password. Debug the code. After Application finished running, i do a ifconfig in ubuntu terminal. The ip address has not been changed

@
void SetpcAddress{

                       QProcess *myProcess = new QProcess();
                       QStringList args;
                       args<<"-c"<<
  "sudo -S ifconfig eth0 192.168.100.21</home/ubuntu/passwd.txt";
                        myProcess->start("/bin/sh",args);

}

int main(void)
{

             SetpcAddress();    

}

@

[houmingc]

i vi a file in /home/ubuntu/passwd.txt with my password. Debug the code. After Application finished running, i do a ifconfig in ubuntu terminal. The ip address has not been changed

@
void SetpcAddress{

                       QProcess *myProcess = new QProcess();
                       QStringList args;
                       args<<"-c"<<
  "sudo -S ifconfig eth0 192.168.100.21</home/ubuntu/passwd.txt";
                        myProcess->start("/bin/sh",args);

}

int main(void)
{

             SetpcAddress();    

}

@

[p3c0]

Does that command work from outside ?

[p3c0]

Does that command work from outside ?

[houmingc]

cat passwd.txt return my password correct

[houmingc]

cat passwd.txt return my password correct

[houmingc]

it works when i do a sudo su
it doesn't work without permission, what should i do next?

[houmingc]

it works when i do a sudo su
it doesn't work without permission, what should i do next?

[p3c0]

It does work for me from the App and Outside
@
args<<"-c"<<
"sudo -S ifconfig eth0 192.168.100.21</home/ubuntu/passwd.txt";
@

There should be a space before and after < in above command.

[p3c0]

It does work for me from the App and Outside
@
args<<"-c"<<
"sudo -S ifconfig eth0 192.168.100.21</home/ubuntu/passwd.txt";
@

There should be a space before and after < in above command.

[houmingc]

under /opt
cat >password.txt 'Key in my password'
cat password 'Check my password'

its work, thanks alot :>>

[houmingc]

under /opt
cat >password.txt 'Key in my password'
cat password 'Check my password'

its work, thanks alot :>>

[p3c0]

Well then get the errors using readyReadStandardError() signal if any.

[p3c0]

Well then get the errors using readyReadStandardError() signal if any.