How to set ip address to a computer in Qt (Solved)
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You need not open a terminal for launching that process. Try following:
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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. -
wrote on 27 Jan 2015, 09:26 last edited by
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
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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();}
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wrote on 27 Jan 2015, 09:26 last edited by
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
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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();}
@
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Does that command work from outside ?
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Does that command work from outside ?
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wrote on 27 Jan 2015, 09:30 last edited by
cat passwd.txt return my password correct
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wrote on 27 Jan 2015, 09:30 last edited by
cat passwd.txt return my password correct
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wrote on 27 Jan 2015, 09:34 last edited by
it works when i do a sudo su
it doesn't work without permission, what should i do next? -
wrote on 27 Jan 2015, 09:34 last edited by
it works when i do a sudo su
it doesn't work without permission, what should i do next? -
It does work for me from the App and Outside
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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.
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It does work for me from the App and Outside
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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.
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wrote on 27 Jan 2015, 09:41 last edited by
under /opt
cat >password.txt 'Key in my password'
cat password 'Check my password'its work, thanks alot :>>
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wrote on 27 Jan 2015, 09:41 last edited by
under /opt
cat >password.txt 'Key in my password'
cat password 'Check my password'its work, thanks alot :>>
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Well then get the errors using readyReadStandardError() signal if any.
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Well then get the errors using readyReadStandardError() signal if any.
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wrote on 27 Jan 2015, 10:01 last edited by
what does "-c" in front of "sudo -s" meant or used for??
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wrote on 27 Jan 2015, 10:01 last edited by
what does "-c" in front of "sudo -s" meant or used for??
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It is for sh so that it reads commands from argument strings. Check "this":http://manpages.ubuntu.com/manpages/utopic/en/man1/sh.1posix.html man page for more details. I hope your system has sh command.
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It is for sh so that it reads commands from argument strings. Check "this":http://manpages.ubuntu.com/manpages/utopic/en/man1/sh.1posix.html man page for more details. I hope your system has sh command.
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wrote on 9 Jun 2015, 07:03 last edited by houmingc 6 Sept 2015, 07:04
QProcess Class is used to start external programs and to communicate with them.
create a new QProcess and input args to /bin/sh.
Below code has been tested working.
Thanks to p3c0, if not, answer below will not be available :QProcess *myProcess = new QProcess; QStringList args; args<"-c"<<"sudo -S ifconfig eth0 192.168.100.1 < /var/passwd.txt"); myProcess->start("/bin/sh",args);