57 lines
1.6 KiB
Python
57 lines
1.6 KiB
Python
import subprocess
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def service_available(service_name):
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"""Determine whether a system service is available"""
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try:
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subprocess.check_output(
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['service', service_name, 'status'],
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stderr=subprocess.STDOUT).decode('UTF-8')
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except subprocess.CalledProcessError as e:
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return b'unrecognized service' not in e.output
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else:
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return True
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def add_new_group(group_name, system_group=False, gid=None):
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cmd = ['addgroup']
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if gid:
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cmd.extend(['--gid', str(gid)])
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if system_group:
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cmd.append('--system')
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else:
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cmd.extend([
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'--group',
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])
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cmd.append(group_name)
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subprocess.check_call(cmd)
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def lsb_release():
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"""Return /etc/lsb-release in a dict"""
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d = {}
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with open('/etc/lsb-release', 'r') as lsb:
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for l in lsb:
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k, v = l.split('=')
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d[k.strip()] = v.strip()
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return d
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def cmp_pkgrevno(package, revno, pkgcache=None):
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"""Compare supplied revno with the revno of the installed package.
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* 1 => Installed revno is greater than supplied arg
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* 0 => Installed revno is the same as supplied arg
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* -1 => Installed revno is less than supplied arg
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This function imports apt_cache function from charmhelpers.fetch if
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the pkgcache argument is None. Be sure to add charmhelpers.fetch if
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you call this function, or pass an apt_pkg.Cache() instance.
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"""
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import apt_pkg
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if not pkgcache:
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from charmhelpers.fetch import apt_cache
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pkgcache = apt_cache()
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pkg = pkgcache[package]
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return apt_pkg.version_compare(pkg.current_ver.ver_str, revno)
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