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Allow custom shell when creating system users #906

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Allow custom shell when creating system users #906

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a29ef37
charmhelpers/core/host.py
Adithya-Rajendran Jul 1, 2024
8c23752
Added tests for system user with different shell
Adithya-Rajendran Jul 1, 2024
1902124
Added default shell for system users
Adithya-Rajendran Jul 1, 2024
4f84f6d
Updated tests for default shell
Adithya-Rajendran Jul 1, 2024
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9 changes: 6 additions & 3 deletions charmhelpers/core/host.py
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Original file line number Diff line number Diff line change
Expand Up @@ -357,7 +357,7 @@ def init_is_systemd(service_name=None):
return os.path.isdir(SYSTEMD_SYSTEM)


def adduser(username, password=None, shell='/bin/bash',
def adduser(username, password=None, shell=None,
system_user=False, primary_group=None,
secondary_groups=None, uid=None, home_dir=None):
"""Add a user to the system.
Expand Down Expand Up @@ -389,11 +389,14 @@ def adduser(username, password=None, shell='/bin/bash',
if home_dir:
cmd.extend(['--home', str(home_dir)])
if system_user or password is None:
cmd.append('--system')
cmd.extend([
'--system',
'--shell', shell if shell else '/usr/sbin/nologin'
])
else:
cmd.extend([
'--create-home',
'--shell', shell,
'--shell', shell if shell else '/bin/bash',
'--password', password,
])
if not primary_group:
Expand Down
28 changes: 28 additions & 0 deletions tests/core/test_host.py
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Original file line number Diff line number Diff line change
Expand Up @@ -755,6 +755,7 @@ def test_adduser_with_groups(self, log, check_call, getpwnam, getgrnam):
@patch.object(host, 'log')
def test_adds_a_systemuser(self, log, check_call, getpwnam):
username = 'johndoe'
shell = '/usr/sbin/nologin'
existing_user_pwnam = KeyError('user not found')
new_user_pwnam = 'some user pwnam'

Expand All @@ -766,6 +767,7 @@ def test_adds_a_systemuser(self, log, check_call, getpwnam):
check_call.assert_called_with([
'useradd',
'--system',
'--shell', shell,
username
])
getpwnam.assert_called_with(username)
Expand All @@ -775,6 +777,7 @@ def test_adds_a_systemuser(self, log, check_call, getpwnam):
@patch.object(host, 'log')
def test_adds_a_systemuser_with_home_dir(self, log, check_call, getpwnam):
username = 'johndoe'
shell = '/usr/sbin/nologin'
existing_user_pwnam = KeyError('user not found')
new_user_pwnam = 'some user pwnam'

Expand All @@ -789,6 +792,29 @@ def test_adds_a_systemuser_with_home_dir(self, log, check_call, getpwnam):
'--home',
'/var/lib/johndoe',
'--system',
'--shell', shell,
username
])
getpwnam.assert_called_with(username)

@patch('pwd.getpwnam')
@patch('subprocess.check_call')
@patch.object(host, 'log')
def test_adds_a_systemuser_with_different_shell(self, log, check_call, getpwnam):
username = 'johndoe'
shell = '/bin/bash'
existing_user_pwnam = KeyError('user not found')
new_user_pwnam = 'some user pwnam'

getpwnam.side_effect = [existing_user_pwnam, new_user_pwnam]

result = host.adduser(username, system_user=True, shell=shell)

self.assertEqual(result, new_user_pwnam)
check_call.assert_called_with([
'useradd',
'--system',
'--shell', shell,
username
])
getpwnam.assert_called_with(username)
Expand All @@ -801,6 +827,7 @@ def test_adds_a_systemuser_with_home_dir(self, log, check_call, getpwnam):
def test_add_user_uid(self, log, check_call, getgrnam, getpwuid, getpwnam):
user_name = 'james'
user_id = 1111
shell = '/usr/sbin/nologin'
uid_key_error = KeyError('user not found')
getpwuid.side_effect = uid_key_error
host.adduser(user_name, uid=user_id)
Expand All @@ -810,6 +837,7 @@ def test_add_user_uid(self, log, check_call, getgrnam, getpwuid, getpwnam):
'--uid',
str(user_id),
'--system',
'--shell', shell,
'-g',
user_name,
user_name
Expand Down
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