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Slight refactorization of the sysctl module

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* Added in support for freebsd-style sysctl commands
* Replaced some functionality that was provided by module_common
* Simplified some logic in a couple of places (ie, not checking
  a split with len() but instead limiting the split to 1)

Fixes #3380
This commit is contained in:
James Cammarata 2013-09-11 13:13:32 -05:00
parent c6067edae6
commit 5110b2d440
1 changed files with 58 additions and 42 deletions
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100
library/system/sysctl
View file

@ -89,19 +89,21 @@ import re
# ==============================================================
def reload_sysctl(**sysctl_args):
def reload_sysctl(module, **sysctl_args):
# update needed ?
if not sysctl_args['reload']:
return 0, ''
# do it
cmd = [ '/sbin/sysctl', '-p', sysctl_args['sysctl_file']]
call = subprocess.Popen(cmd, shell=False, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
out, err = call.communicate()
if call.returncode == 0:
return 0, ''
if get_platform().lower() == 'freebsd':
# freebsd doesn't support -p, so reload the sysctl service
rc,out,err = module.run_command('/etc/rc.d/sysctl reload')
else:
return call.returncode, out+err
# system supports reloading via the -p flag to sysctl, so we'll use that
sysctl_cmd = module.get_bin_path('sysctl', required=True)
rc,out,err = module.run_command([sysctl_cmd, '-p', sysctl_args['sysctl_file']])
return rc,out+err
# ==============================================================
@ -126,8 +128,13 @@ def write_sysctl(module, lines, **sysctl_args):
# ==============================================================
def sysctl_args_expand(**sysctl_args):
sysctl_args['key_path'] = sysctl_args['name'].replace('.' ,'/')
sysctl_args['key_path'] = '/proc/sys/' + sysctl_args['key_path']
if get_platform().lower() == 'freebsd':
# FreeBSD does not use the /proc file system, and instead
# just uses the sysctl command to set the values
sysctl_args['key_path'] = None
else:
sysctl_args['key_path'] = sysctl_args['name'].replace('.' ,'/')
sysctl_args['key_path'] = '/proc/sys/' + sysctl_args['key_path']
return sysctl_args
# ==============================================================
@ -144,7 +151,7 @@ def sysctl_args_collapse(**sysctl_args):
# ==============================================================
def sysctl_check(current_step, **sysctl_args):
def sysctl_check(module, current_step, **sysctl_args):
# no smart checks at this step ?
if sysctl_args['checks'] == 'none':
@ -164,42 +171,51 @@ def sysctl_check(current_step, **sysctl_args):
if not sysctl_args['reload'] and sysctl_args['checks'] in ['after', 'both']:
return 1, 'checks cannot be set to after or both if reload=no'
# getting file stat
if not os.access(sysctl_args['key_path'], os.F_OK):
return 1, 'key_path is not an existing file, key seems invalid'
if not os.access(sysctl_args['key_path'], os.R_OK):
return 1, 'key_path is not a readable file, key seems to be uncheckable'
if sysctl_args['key_path'] is not None:
# getting file stat
if not os.access(sysctl_args['key_path'], os.F_OK):
return 1, 'key_path is not an existing file, key %s seems invalid' % sysctl_args['key_path']
if not os.access(sysctl_args['key_path'], os.R_OK):
return 1, 'key_path is not a readable file, key seems to be uncheckable'
# checks before
if current_step == 'before' and sysctl_args['checks'] in ['before', 'both']:
if not os.access(sysctl_args['key_path'], os.W_OK):
if sysctl_args['key_path'] is not None and not os.access(sysctl_args['key_path'], os.W_OK):
return 1, 'key_path is not a writable file, key seems to be read only'
return 0, ''
# checks after
if current_step == 'after' and sysctl_args['checks'] in ['after', 'both']:
if sysctl_args['value'] is not None:
# reading the virtual file
f = open(sysctl_args['key_path'],'r')
output = f.read()
f.close()
if sysctl_args['key_path'] is not None:
# reading the virtual file
f = open(sysctl_args['key_path'],'r')
output = f.read()
f.close()
else:
# we're on a system without /proc (ie. freebsd), so just
# use the sysctl command to get the currently set value
sysctl_cmd = module.get_bin_path('sysctl', required=True)
rc,output,stderr = module.run_command("%s -n %s" % (sysctl_cmd, sysctl_args['name']))
if rc != 0:
return 1, 'failed to lookup the value via the sysctl command'
output = output.strip(' \t\n\r')
output = re.sub(r'\s+', ' ', output)
# multi positive integer values separated by spaces as described in issue #2004 :
if re.search('^([\d\s]+)$', sysctl_args['value']):
# replace all groups of spaces by one space
output = re.sub('(\s+)', ' ', output)
# normal case, finded value must be equal to the submitted value :
# normal case, found value must be equal to the submitted value, and
# we compare the exploded values to handle any whitepsace differences
if output.split() != sysctl_args['value'].split():
return 1, 'key seems not set to value even after update/sysctl, founded : <%s>, wanted : <%s>' % (output, sysctl_args['value'])
return 0, ''
return 0, ''
else:
# no value was supplied, so we're checking to make sure
# the associated name is absent. We just fudge this since
# the sysctl isn't really gone, just removed from the conf
# file meaning it will be whatever the system default is
return 0, ''
# weird end
return 1, 'unexpected position reached'
@ -233,12 +249,17 @@ def main():
# prepare vars
sysctl_args = sysctl_args_expand(**sysctl_args)
new_line = "%s = %s\n" % (sysctl_args['name'], sysctl_args['value'])
if get_platform().lower() == 'freebsd':
# freebsd does not like spaces around the equal sign
pattern = "%s=%s\n"
else:
pattern = "%s = %s\n"
new_line = pattern % (sysctl_args['name'], sysctl_args['value'])
to_write = []
founded = False
# make checks before act
res,msg = sysctl_check('before', **sysctl_args)
res,msg = sysctl_check(module, 'before', **sysctl_args)
if res != 0:
module.fail_json(msg='checks_before failed with: ' + msg)
@ -257,15 +278,10 @@ def main():
if line.strip().startswith('#'):
to_write.append(line)
continue
if len(line.split('=')) != 2:
# not sure what this is or why it is here
# but it is not our fault so leave it be
to_write.append(line)
continue
# write line if not the one searched
ld = {}
ld['name'], ld['val'] = line.split('=')
ld['name'], ld['val'] = line.split('=',1)
ld['name'] = ld['name'].strip()
if ld['name'] != sysctl_args['name']:
@ -303,10 +319,10 @@ def main():
res = 0
if sysctl_args['changed'] == True:
sysctl_args = write_sysctl(module, to_write, **sysctl_args)
res,msg = reload_sysctl(**sysctl_args)
res,msg = reload_sysctl(module, **sysctl_args)
# make checks after act
res,msg = sysctl_check('after', **sysctl_args)
res,msg = sysctl_check(module, 'after', **sysctl_args)
if res != 0:
module.fail_json(msg='checks_after failed with: ' + msg)