mirror of
https://github.com/ansible-collections/community.general.git
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68243063d1
* Adding pattern and ignore_case options * Adding changelog fragment * Fixing changelog fragment * Addressing FreeBSD 11.4/python 3 errors with explicit conversion * Correcting descriptions * Reverting back to regex input * Fixing test syntax errors
138 lines
3.9 KiB
Python
138 lines
3.9 KiB
Python
#!/usr/bin/python
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# Copyright: (c) 2019, Saranya Sridharan
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# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
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from __future__ import (absolute_import, division, print_function)
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__metaclass__ = type
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DOCUMENTATION = '''
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module: pids
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description: "Retrieves a list of PIDs of given process name in Ansible controller/controlled machines.Returns an empty list if no process in that name exists."
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short_description: "Retrieves process IDs list if the process is running otherwise return empty list"
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author:
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- Saranya Sridharan (@saranyasridharan)
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requirements:
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- psutil(python module)
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options:
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name:
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description: The name of the process(es) you want to get PID(s) for.
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type: str
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pattern:
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description: The pattern (regular expression) to match the process(es) you want to get PID(s) for.
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type: str
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version_added: 3.0.0
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ignore_case:
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description: Ignore case in pattern if using the I(pattern) option.
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type: bool
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default: false
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version_added: 3.0.0
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'''
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EXAMPLES = r'''
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# Pass the process name
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- name: Getting process IDs of the process
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community.general.pids:
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name: python
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register: pids_of_python
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- name: Printing the process IDs obtained
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ansible.builtin.debug:
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msg: "PIDS of python:{{pids_of_python.pids|join(',')}}"
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- name: Getting process IDs of processes matching pattern
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community.general.pids:
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pattern: python(2(\.7)?|3(\.6)?)?\s+myapp\.py
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register: myapp_pids
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'''
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RETURN = '''
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pids:
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description: Process IDs of the given process
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returned: list of none, one, or more process IDs
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type: list
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sample: [100,200]
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'''
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import re
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from os.path import basename
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from ansible.module_utils.basic import AnsibleModule, missing_required_lib
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from ansible.module_utils.common.text.converters import to_native
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try:
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import psutil
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HAS_PSUTIL = True
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except ImportError:
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HAS_PSUTIL = False
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def compare_lower(a, b):
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if a is None or b is None:
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# this could just be "return False" but would lead to surprising behavior if both a and b are None
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return a == b
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return a.lower() == b.lower()
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def get_pid(name):
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pids = []
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for proc in psutil.process_iter(attrs=['name', 'cmdline']):
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if compare_lower(proc.info['name'], name) or \
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proc.info['cmdline'] and compare_lower(proc.info['cmdline'][0], name):
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pids.append(proc.pid)
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return pids
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def get_matching_command_pids(pattern, ignore_case):
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flags = 0
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if ignore_case:
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flags |= re.I
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regex = re.compile(pattern, flags)
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# See https://psutil.readthedocs.io/en/latest/#find-process-by-name for more information
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return [p.pid for p in psutil.process_iter(["name", "exe", "cmdline"])
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if regex.search(to_native(p.info["name"]))
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or (p.info["exe"] and regex.search(basename(to_native(p.info["exe"]))))
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or (p.info["cmdline"] and regex.search(to_native(' '.join(p.cmdline()))))
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]
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def main():
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module = AnsibleModule(
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argument_spec=dict(
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name=dict(type="str"),
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pattern=dict(type="str"),
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ignore_case=dict(type="bool", default=False),
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),
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required_one_of=[
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('name', 'pattern')
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],
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mutually_exclusive=[
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('name', 'pattern')
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],
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supports_check_mode=True,
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)
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if not HAS_PSUTIL:
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module.fail_json(msg=missing_required_lib('psutil'))
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name = module.params["name"]
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pattern = module.params["pattern"]
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ignore_case = module.params["ignore_case"]
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if name:
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response = dict(pids=get_pid(name))
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else:
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try:
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response = dict(pids=get_matching_command_pids(pattern, ignore_case))
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except re.error as e:
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module.fail_json(msg="'%s' is not a valid regular expression: %s" % (pattern, to_native(e)))
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module.exit_json(**response)
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if __name__ == '__main__':
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main()
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