Linux Script Sudo and "&"

[s3fac5]

if the script is just for you, try that

echo <password> | sudo -S <command>

thanks for your information
i will give it a try
:)

[DeaD_EyE]

I think you want to look how /etc/soduers work.
You can allow all/single/list of commands for a user/group.
You can define, that the user needs no password to execute a specified program as root.

Another solution could be, that you run your program not as root, but the part, where
the root access is needed, you can start the external program with sudo (e.g. with subprocess.Popen).
This will make your application bit more safe.

Maybe this is possible solution:

import getpass
import shlex
from functools import wraps
from subprocess import Popen, PIPE, DEVNULL
 
 
class Sudo:
    def __init__(self, user='root', quiet=False):
        self.password = None
        self.user = user
        self.cmd = ['sudo', '-S', '-u', user]
        self.quiet = quiet
 
    def authorize(self):
        self.password = getpass.getpass(f'Password for {self.user}: ')
 
    def run(self, cmd):
        if not self.password:
            self.authorize()
        cmd = self.cmd + shlex.split(cmd)
        if self.quiet:
            proc = Popen(cmd, stdin=PIPE, stdout=DEVNULL, stderr=DEVNULL, encoding='utf8')
        else:
            proc = Popen(cmd, stdin=PIPE, encoding='utf8')
        proc.stdin.write(self.password)
        proc.stdin.write('\n')
        return proc
 
    __call__ = run
    # allows to call the instance
 
root = Sudo()
siemens = Sudo(user='siemens')
print('Hello from Python')
 
# the wait blocks until the program ends
print('cal')
root('cal').wait()
print('whoami')
root('whoami').wait() # second one does not require the password, because it's stored
# if you don't use the blocking method wait, the order of output is not preserved
 
print('uname -a')
siemens('uname -a').wait()
print('whoami')
siemens('whoami').wait()
print()
print('Program ends')

[s3fac5]

I think you want to look how /etc/soduers work.
You can allow all/single/list of commands for a user/group.
You can define, that the user needs no password to execute a specified program as root.

Another solution could be, that you run your program not as root, but the part, where
the root access is needed, you can start the external program with sudo (e.g. with subprocess.Popen).
This will make your application bit more safe.

Maybe this is possible solution:

import getpass
import shlex
from functools import wraps
from subprocess import Popen, PIPE, DEVNULL
 
 
class Sudo:
    def __init__(self, user='root', quiet=False):
        self.password = None
        self.user = user
        self.cmd = ['sudo', '-S', '-u', user]
        self.quiet = quiet
 
    def authorize(self):
        self.password = getpass.getpass(f'Password for {self.user}: ')
 
    def run(self, cmd):
        if not self.password:
            self.authorize()
        cmd = self.cmd + shlex.split(cmd)
        if self.quiet:
            proc = Popen(cmd, stdin=PIPE, stdout=DEVNULL, stderr=DEVNULL, encoding='utf8')
        else:
            proc = Popen(cmd, stdin=PIPE, encoding='utf8')
        proc.stdin.write(self.password)
        proc.stdin.write('\n')
        return proc
 
    __call__ = run
    # allows to call the instance
 
root = Sudo()
siemens = Sudo(user='siemens')
print('Hello from Python')
 
# the wait blocks until the program ends
print('cal')
root('cal').wait()
print('whoami')
root('whoami').wait() # second one does not require the password, because it's stored
# if you don't use the blocking method wait, the order of output is not preserved
 
print('uname -a')
siemens('uname -a').wait()
print('whoami')
siemens('whoami').wait()
print()
print('Program ends')

ok i have to say cause my noob state on python programming
your code is excellent i will try it tomorrow
by doing some modification on my own program
give me some time and i will reply back
thanks again

[DeaD_EyE]

You should experiment with this code. I guess you'll get unexpected results.
It depends on the program you want to start.

The direct use of stdin, stdut and stderr is a little bit tricky and if you're doing it
wrong, it blocks forever.

[s3fac5]

You should experiment with this code. I guess you'll get unexpected results.
It depends on the program you want to start.

The direct use of stdin, stdut and stderr is a little bit tricky and if you're doing it
wrong, it blocks forever.

i get something
i will try to fix it
thanks everyone for the help
i mark this thread as solved