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+# -*- coding: utf-8 -*-
+
+# Copyright: (c) 2012, Michael DeHaan <michael.dehaan@gmail.com>, and others
+# Copyright: (c) 2016, Toshio Kuratomi <tkuratomi@ansible.com>
+# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
+
+from __future__ import absolute_import, division, print_function
+__metaclass__ = type
+
+
+DOCUMENTATION = r'''
+---
+module: command
+short_description: Execute commands on targets
+version_added: historical
+description:
+ - The C(command) module takes the command name followed by a list of space-delimited arguments.
+ - The given command will be executed on all selected nodes.
+ - The command(s) will not be
+ processed through the shell, so variables like C($HOSTNAME) and operations
+ like C("*"), C("<"), C(">"), C("|"), C(";") and C("&") will not work.
+ Use the M(ansible.builtin.shell) module if you need these features.
+ - To create C(command) tasks that are easier to read than the ones using space-delimited
+ arguments, pass parameters using the C(args) L(task keyword,https://docs.ansible.com/ansible/latest/reference_appendices/playbooks_keywords.html#task)
+ or use C(cmd) parameter.
+ - Either a free form command or C(cmd) parameter is required, see the examples.
+ - For Windows targets, use the M(ansible.windows.win_command) module instead.
+extends_documentation_fragment:
+ - action_common_attributes
+ - action_common_attributes.raw
+attributes:
+ check_mode:
+ details: while the command itself is arbitrary and cannot be subject to the check mode semantics it adds C(creates)/C(removes) options as a workaround
+ support: partial
+ diff_mode:
+ support: none
+ platform:
+ support: full
+ platforms: posix
+ raw:
+ support: full
+options:
+ free_form:
+ description:
+ - The command module takes a free form string as a command to run.
+ - There is no actual parameter named 'free form'.
+ cmd:
+ type: str
+ description:
+ - The command to run.
+ argv:
+ type: list
+ elements: str
+ description:
+ - Passes the command as a list rather than a string.
+ - Use C(argv) to avoid quoting values that would otherwise be interpreted incorrectly (for example "user name").
+ - Only the string (free form) or the list (argv) form can be provided, not both. One or the other must be provided.
+ version_added: "2.6"
+ creates:
+ type: path
+ description:
+ - A filename or (since 2.0) glob pattern. If a matching file already exists, this step B(will not) be run.
+ - This is checked before I(removes) is checked.
+ removes:
+ type: path
+ description:
+ - A filename or (since 2.0) glob pattern. If a matching file exists, this step B(will) be run.
+ - This is checked after I(creates) is checked.
+ version_added: "0.8"
+ chdir:
+ type: path
+ description:
+ - Change into this directory before running the command.
+ version_added: "0.6"
+ stdin:
+ description:
+ - Set the stdin of the command directly to the specified value.
+ type: str
+ version_added: "2.4"
+ stdin_add_newline:
+ type: bool
+ default: yes
+ description:
+ - If set to C(true), append a newline to stdin data.
+ version_added: "2.8"
+ strip_empty_ends:
+ description:
+ - Strip empty lines from the end of stdout/stderr in result.
+ version_added: "2.8"
+ type: bool
+ default: yes
+notes:
+ - If you want to run a command through the shell (say you are using C(<), C(>), C(|), and so on),
+ you actually want the M(ansible.builtin.shell) module instead.
+ Parsing shell metacharacters can lead to unexpected commands being executed if quoting is not done correctly so it is more secure to
+ use the C(command) module when possible.
+ - C(creates), C(removes), and C(chdir) can be specified after the command.
+ For instance, if you only want to run a command if a certain file does not exist, use this.
+ - Check mode is supported when passing C(creates) or C(removes). If running in check mode and either of these are specified, the module will
+ check for the existence of the file and report the correct changed status. If these are not supplied, the task will be skipped.
+ - The C(executable) parameter is removed since version 2.4. If you have a need for this parameter, use the M(ansible.builtin.shell) module instead.
+ - For Windows targets, use the M(ansible.windows.win_command) module instead.
+ - For rebooting systems, use the M(ansible.builtin.reboot) or M(ansible.windows.win_reboot) module.
+seealso:
+- module: ansible.builtin.raw
+- module: ansible.builtin.script
+- module: ansible.builtin.shell
+- module: ansible.windows.win_command
+author:
+ - Ansible Core Team
+ - Michael DeHaan
+'''
+
+EXAMPLES = r'''
+- name: Return motd to registered var
+ ansible.builtin.command: cat /etc/motd
+ register: mymotd
+
+# free-form (string) arguments, all arguments on one line
+- name: Run command if /path/to/database does not exist (without 'args')
+ ansible.builtin.command: /usr/bin/make_database.sh db_user db_name creates=/path/to/database
+
+# free-form (string) arguments, some arguments on separate lines with the 'args' keyword
+# 'args' is a task keyword, passed at the same level as the module
+- name: Run command if /path/to/database does not exist (with 'args' keyword)
+ ansible.builtin.command: /usr/bin/make_database.sh db_user db_name
+ args:
+ creates: /path/to/database
+
+# 'cmd' is module parameter
+- name: Run command if /path/to/database does not exist (with 'cmd' parameter)
+ ansible.builtin.command:
+ cmd: /usr/bin/make_database.sh db_user db_name
+ creates: /path/to/database
+
+- name: Change the working directory to somedir/ and run the command as db_owner if /path/to/database does not exist
+ ansible.builtin.command: /usr/bin/make_database.sh db_user db_name
+ become: yes
+ become_user: db_owner
+ args:
+ chdir: somedir/
+ creates: /path/to/database
+
+# argv (list) arguments, each argument on a separate line, 'args' keyword not necessary
+# 'argv' is a parameter, indented one level from the module
+- name: Use 'argv' to send a command as a list - leave 'command' empty
+ ansible.builtin.command:
+ argv:
+ - /usr/bin/make_database.sh
+ - Username with whitespace
+ - dbname with whitespace
+ creates: /path/to/database
+
+- name: Safely use templated variable to run command. Always use the quote filter to avoid injection issues
+ ansible.builtin.command: cat {{ myfile|quote }}
+ register: myoutput
+'''
+
+RETURN = r'''
+msg:
+ description: changed
+ returned: always
+ type: bool
+ sample: True
+start:
+ description: The command execution start time.
+ returned: always
+ type: str
+ sample: '2017-09-29 22:03:48.083128'
+end:
+ description: The command execution end time.
+ returned: always
+ type: str
+ sample: '2017-09-29 22:03:48.084657'
+delta:
+ description: The command execution delta time.
+ returned: always
+ type: str
+ sample: '0:00:00.001529'
+stdout:
+ description: The command standard output.
+ returned: always
+ type: str
+ sample: 'Clustering node rabbit@slave1 with rabbit@master …'
+stderr:
+ description: The command standard error.
+ returned: always
+ type: str
+ sample: 'ls cannot access foo: No such file or directory'
+cmd:
+ description: The command executed by the task.
+ returned: always
+ type: list
+ sample:
+ - echo
+ - hello
+rc:
+ description: The command return code (0 means success).
+ returned: always
+ type: int
+ sample: 0
+stdout_lines:
+ description: The command standard output split in lines.
+ returned: always
+ type: list
+ sample: [u'Clustering node rabbit@slave1 with rabbit@master …']
+stderr_lines:
+ description: The command standard error split in lines.
+ returned: always
+ type: list
+ sample: [u'ls cannot access foo: No such file or directory', u'ls …']
+'''
+
+import datetime
+import glob
+import os
+import shlex
+
+from ansible.module_utils.basic import AnsibleModule
+from ansible.module_utils._text import to_native, to_bytes, to_text
+from ansible.module_utils.common.collections import is_iterable
+
+
+def main():
+
+ # the command module is the one ansible module that does not take key=value args
+ # hence don't copy this one if you are looking to build others!
+ # NOTE: ensure splitter.py is kept in sync for exceptions
+ module = AnsibleModule(
+ argument_spec=dict(
+ _raw_params=dict(),
+ _uses_shell=dict(type='bool', default=False),
+ argv=dict(type='list', elements='str'),
+ chdir=dict(type='path'),
+ executable=dict(),
+ creates=dict(type='path'),
+ removes=dict(type='path'),
+ # The default for this really comes from the action plugin
+ stdin=dict(required=False),
+ stdin_add_newline=dict(type='bool', default=True),
+ strip_empty_ends=dict(type='bool', default=True),
+ ),
+ supports_check_mode=True,
+ )
+ shell = module.params['_uses_shell']
+ chdir = module.params['chdir']
+ executable = module.params['executable']
+ args = module.params['_raw_params']
+ argv = module.params['argv']
+ creates = module.params['creates']
+ removes = module.params['removes']
+ stdin = module.params['stdin']
+ stdin_add_newline = module.params['stdin_add_newline']
+ strip = module.params['strip_empty_ends']
+
+ # we promissed these in 'always' ( _lines get autoaded on action plugin)
+ r = {'changed': False, 'stdout': '', 'stderr': '', 'rc': None, 'cmd': None, 'start': None, 'end': None, 'delta': None, 'msg': ''}
+
+ if not shell and executable:
+ module.warn("As of Ansible 2.4, the parameter 'executable' is no longer supported with the 'command' module. Not using '%s'." % executable)
+ executable = None
+
+ if (not args or args.strip() == '') and not argv:
+ r['rc'] = 256
+ r['msg'] = "no command given"
+ module.fail_json(**r)
+
+ if args and argv:
+ r['rc'] = 256
+ r['msg'] = "only command or argv can be given, not both"
+ module.fail_json(**r)
+
+ if not shell and args:
+ args = shlex.split(args)
+
+ args = args or argv
+ # All args must be strings
+ if is_iterable(args, include_strings=False):
+ args = [to_native(arg, errors='surrogate_or_strict', nonstring='simplerepr') for arg in args]
+
+ r['cmd'] = args
+
+ if chdir:
+ chdir = to_bytes(chdir, errors='surrogate_or_strict')
+
+ try:
+ os.chdir(chdir)
+ except (IOError, OSError) as e:
+ r['msg'] = 'Unable to change directory before execution: %s' % to_text(e)
+ module.fail_json(**r)
+
+ # check_mode partial support, since it only really works in checking creates/removes
+ if module.check_mode:
+ shoulda = "Would"
+ else:
+ shoulda = "Did"
+
+ # special skips for idempotence if file exists (assumes command creates)
+ if creates:
+ if glob.glob(creates):
+ r['msg'] = "%s not run command since '%s' exists" % (shoulda, creates)
+ r['stdout'] = "skipped, since %s exists" % creates # TODO: deprecate
+
+ r['rc'] = 0
+
+ # special skips for idempotence if file does not exist (assumes command removes)
+ if not r['msg'] and removes:
+ if not glob.glob(removes):
+ r['msg'] = "%s not run command since '%s' does not exist" % (shoulda, removes)
+ r['stdout'] = "skipped, since %s does not exist" % removes # TODO: deprecate
+ r['rc'] = 0
+
+ if r['msg']:
+ module.exit_json(**r)
+
+ r['changed'] = True
+
+ # actually executes command (or not ...)
+ if not module.check_mode:
+ r['start'] = datetime.datetime.now()
+ r['rc'], r['stdout'], r['stderr'] = module.run_command(args, executable=executable, use_unsafe_shell=shell, encoding=None,
+ data=stdin, binary_data=(not stdin_add_newline))
+ r['end'] = datetime.datetime.now()
+ else:
+ # this is partial check_mode support, since we end up skipping if we get here
+ r['rc'] = 0
+ r['msg'] = "Command would have run if not in check mode"
+ if creates is None and removes is None:
+ r['skipped'] = True
+ # skipped=True and changed=True are mutually exclusive
+ r['changed'] = False
+
+ # convert to text for jsonization and usability
+ if r['start'] is not None and r['end'] is not None:
+ # these are datetime objects, but need them as strings to pass back
+ r['delta'] = to_text(r['end'] - r['start'])
+ r['end'] = to_text(r['end'])
+ r['start'] = to_text(r['start'])
+
+ if strip:
+ r['stdout'] = to_text(r['stdout']).rstrip("\r\n")
+ r['stderr'] = to_text(r['stderr']).rstrip("\r\n")
+
+ if r['rc'] != 0:
+ r['msg'] = 'non-zero return code'
+ module.fail_json(**r)
+
+ module.exit_json(**r)
+
+
+if __name__ == '__main__':
+ main()