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While working with subrpocess module I try to run the .call() method by passing two parameters Eg. subrpocess.call("sudo ifconfig" , shell=True); But when I run the program its asking for password, could you please tell me how to pass it?

max
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Shwetang Rangari
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  • I don't have the root privileges so every time I ran any system command I need to put in password so is there any provision to pass password? – Shwetang Rangari Feb 22 '20 at 09:28
  • I improved my answer. It turns out, I, a long-time Linux user, am not an expert on sudo, and I am learning quite a bit from the linked reference. – hellork Feb 22 '20 at 11:17

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Use the -S option to pipe the password to sudo. 

echo "mypass" | sudo -S ifconfig...

or with Python subprocess, according to the duplicate answer:

call('echo {} | sudo -S {}'.format("mypass", "ifconfig..."), shell=True)

New users tend to overuse sudo. Sudo runs commands with the security privileges of another user. Sudo defaults to superuser or root privileges.

Administrators can configure which users are permitted to run which commands as another user, with audit trails and logs. The file, /etc/sudoers configures who can use sudo without a password, among other things. More...

Another way to send a password to sudo during invocation is to use the -A or --askpass option. Sudo uses the environment variable, SUDO_ASKPASS to tell sudo where to look for a program to supply a password on the standard output. One could use a graphical program like zenity to pop up a window asking for a password. Or simply create a script to echo the password. Although this works as a demo, it is probably a bad idea to have plain text passwords sitting around on the filesystem.

$ export SUDO_ASKPASS=$(pwd)/mypass.sh
$ echo "echo mypassword" > mypass.sh; chmod +x mypass.sh
$ sudo -A -u testuser bash
# whoami
testuser

Sudo has many command options that were unknown prior to answering this question. Type man sudo to see what this author learned today.

hellork
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