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cron: replacement for os.getlogin() (#4777)

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os.getlogin() returns the user logged in on the controlling terminal. However
'crontab' only looks for the login name of the process' real user id which
pwd.getpwuid(os.getuid())[0] does provide.

While in most cases there is no difference, the former might fail under certain
circumstances (e.g. a lxc container connected by attachment without login),
throwing the error 'OSError: [Errno 25] Inappropriate ioctl for device'.
This commit is contained in:
Gregor Giesen 2016-09-12 07:39:12 +02:00 committed by René Moser
parent 987d9b2b4a
commit 2f3fdc4975
1 changed files with 3 additions and 2 deletions
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5
system/cron.py
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@ -200,6 +200,7 @@ EXAMPLES = '''
'''
import os
import pwd
import re
import tempfile
import platform
@ -479,7 +480,7 @@ class CronTab(object):
return "%s -l %s" % (pipes.quote(CRONCMD), pipes.quote(self.user))
elif platform.system() == 'HP-UX':
return "%s %s %s" % (CRONCMD , '-l', pipes.quote(self.user))
elif os.getlogin() != self.user:
elif pwd.getpwuid(os.getuid())[0] != self.user:
user = '-u %s' % pipes.quote(self.user)
return "%s %s %s" % (CRONCMD , user, '-l')
@ -491,7 +492,7 @@ class CronTab(object):
if self.user:
if platform.system() in ['SunOS', 'HP-UX', 'AIX']:
return "chown %s %s ; su '%s' -c '%s %s'" % (pipes.quote(self.user), pipes.quote(path), pipes.quote(self.user), CRONCMD, pipes.quote(path))
elif os.getlogin() != self.user:
elif pwd.getpwuid(os.getuid())[0] != self.user:
user = '-u %s' % pipes.quote(self.user)
return "%s %s %s" % (CRONCMD , user, pipes.quote(path))