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ansible/library/files/file
Michael Scherer 049c9c6b18 Make file module work on python 2.4, fix #9080 
Python 2.4 do not support "except ... as ..." construct, so
revert back to the older syntax.
2014-09-21 01:50:58 +02:00

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#!/usr/bin/python
# -*- coding: utf-8 -*-
# (c) 2012, Michael DeHaan <michael.dehaan@gmail.com>
#
# This file is part of Ansible
#
# Ansible is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Ansible is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
import shutil
import stat
import grp
import pwd
try:
import selinux
HAVE_SELINUX=True
except ImportError:
HAVE_SELINUX=False
DOCUMENTATION = '''
---
module: file
version_added: "historical"
short_description: Sets attributes of files
extends_documentation_fragment: files
description:
- Sets attributes of files, symlinks, and directories, or removes
files/symlinks/directories. Many other modules support the same options as
the M(file) module - including M(copy), M(template), and M(assemble).
notes:
- See also M(copy), M(template), M(assemble)
requirements: [ ]
author: Michael DeHaan
options:
path:
description:
- 'path to the file being managed. Aliases: I(dest), I(name)'
required: true
default: []
aliases: ['dest', 'name']
state:
description:
- If C(directory), all immediate subdirectories will be created if they
do not exist, since 1.7 they will be created with the supplied permissions.
If C(file), the file will NOT be created if it does not exist, see the M(copy)
or M(template) module if you want that behavior. If C(link), the symbolic
link will be created or changed. Use C(hard) for hardlinks. If C(absent),
directories will be recursively deleted, and files or symlinks will be unlinked.
If C(touch) (new in 1.4), an empty file will be created if the c(path) does not
exist, while an existing file or directory will receive updated file access and
modification times (similar to the way `touch` works from the command line).
required: false
default: file
choices: [ file, link, directory, hard, touch, absent ]
src:
required: false
default: null
choices: []
description:
- path of the file to link to (applies only to C(state=link)). Will accept absolute,
relative and nonexisting paths. Relative paths are not expanded.
recurse:
required: false
default: "no"
choices: [ "yes", "no" ]
version_added: "1.1"
description:
- recursively set the specified file attributes (applies only to state=directory)
force:
required: false
default: "no"
choices: [ "yes", "no" ]
description:
- 'force the creation of the symlinks in two cases: the source file does
not exist (but will appear later); the destination exists and is a file (so, we need to unlink the
"path" file and create symlink to the "src" file in place of it).'
'''
EXAMPLES = '''
- file: path=/etc/foo.conf owner=foo group=foo mode=0644
- file: src=/file/to/link/to dest=/path/to/symlink owner=foo group=foo state=link
- file: src=/tmp/{{ item.path }} dest={{ item.dest }} state=link
with_items:
- { path: 'x', dest: 'y' }
- { path: 'z', dest: 'k' }
# touch a file, using symbolic modes to set the permissions (equivalent to 0644)
- file: path=/etc/foo.conf state=touch mode="u=rw,g=r,o=r"
# touch the same file, but add/remove some permissions
- file: path=/etc/foo.conf state=touch mode="u+rw,g-wx,o-rwx"
'''
def main():
module = AnsibleModule(
argument_spec = dict(
state = dict(choices=['file','directory','link','hard','touch','absent'], default=None),
path = dict(aliases=['dest', 'name'], required=True),
original_basename = dict(required=False), # Internal use only, for recursive ops
recurse = dict(default='no', type='bool'),
force = dict(required=False,default=False,type='bool'),
diff_peek = dict(default=None),
validate = dict(required=False, default=None),
src = dict(required=False, default=None),
),
add_file_common_args=True,
supports_check_mode=True
)
params = module.params
state = params['state']
force = params['force']
diff_peek = params['diff_peek']
src = params['src']
follow = params['follow']
# modify source as we later reload and pass, specially relevant when used by other modules.
params['path'] = path = os.path.expanduser(params['path'])
# short-circuit for diff_peek
if diff_peek is not None:
appears_binary = False
try:
f = open(path)
b = f.read(8192)
f.close()
if "\x00" in b:
appears_binary = True
except:
pass
module.exit_json(path=path, changed=False, appears_binary=appears_binary)
# Find out current state
prev_state = 'absent'
if os.path.lexists(path):
if os.path.islink(path):
prev_state = 'link'
elif os.path.isdir(path):
prev_state = 'directory'
elif os.stat(path).st_nlink > 1:
prev_state = 'hard'
else:
# could be many other things, but defaulting to file
prev_state = 'file'
# state should default to file, but since that creates many conflicts,
# default to 'current' when it exists.
if state is None:
if prev_state != 'absent':
state = prev_state
else:
state = 'file'
# source is both the source of a symlink or an informational passing of the src for a template module
# or copy module, even if this module never uses it, it is needed to key off some things
if src is not None:
src = os.path.expanduser(src)
# original_basename is used by other modules that depend on file.
if os.path.isdir(path) and state not in ["link", "absent"]:
if params['original_basename']:
basename = params['original_basename']
else:
basename = os.path.basename(src)
params['path'] = path = os.path.join(path, basename)
else:
if state in ['link','hard']:
if follow:
# use the current target of the link as the source
src = os.readlink(path)
else:
module.fail_json(msg='src and dest are required for creating links')
# make sure the target path is a directory when we're doing a recursive operation
recurse = params['recurse']
if recurse and state != 'directory':
module.fail_json(path=path, msg="recurse option requires state to be 'directory'")
file_args = module.load_file_common_arguments(params)
changed = False
if state == 'absent':
if state != prev_state:
if not module.check_mode:
if prev_state == 'directory':
try:
shutil.rmtree(path, ignore_errors=False)
except Exception, e:
module.fail_json(msg="rmtree failed: %s" % str(e))
else:
try:
os.unlink(path)
except Exception, e:
module.fail_json(path=path, msg="unlinking failed: %s " % str(e))
module.exit_json(path=path, changed=True)
else:
module.exit_json(path=path, changed=False)
elif state == 'file':
if state != prev_state:
# file is not absent and any other state is a conflict
module.fail_json(path=path, msg='file (%s) is %s, cannot continue' % (path, prev_state))
changed = module.set_fs_attributes_if_different(file_args, changed)
module.exit_json(path=path, changed=changed)
elif state == 'directory':
if prev_state == 'absent':
if module.check_mode:
module.exit_json(changed=True)
changed = True
curpath = ''
# Split the path so we can apply filesystem attributes recursively
# from the root (/) directory for absolute paths or the base path
# of a relative path. We can then walk the appropriate directory
# path to apply attributes.
for dirname in path.strip('/').split('/'):
curpath = '/'.join([curpath, dirname])
# Remove leading slash if we're creating a relative path
if not os.path.isabs(path):
curpath = curpath.lstrip('/')
if not os.path.exists(curpath):
os.mkdir(curpath)
tmp_file_args = file_args.copy()
tmp_file_args['path']=curpath
changed = module.set_fs_attributes_if_different(tmp_file_args, changed)
changed = module.set_fs_attributes_if_different(file_args, changed)
if recurse:
for root,dirs,files in os.walk( file_args['path'] ):
for fsobj in dirs + files:
fsname=os.path.join(root, fsobj)
tmp_file_args = file_args.copy()
tmp_file_args['path']=fsname
changed = module.set_fs_attributes_if_different(tmp_file_args, changed)
module.exit_json(path=path, changed=changed)
elif state in ['link','hard']:
if os.path.isdir(path) and not os.path.islink(path):
relpath = path
else:
relpath = os.path.dirname(path)
absrc = os.path.normpath('%s/%s' % (relpath, os.path.basename(src)))
if not os.path.exists(src) and not os.path.exists(absrc) and not force:
module.fail_json(path=path, src=src, msg='src file does not exist, use "force=yes" if you really want to create the link: %s' % absrc)
if state == 'hard':
if not os.path.isabs(src):
module.fail_json(msg="absolute paths are required")
elif prev_state == 'directory':
if not force:
module.fail_json(path=path, msg='refusing to convert between %s and %s for %s' % (prev_state, state, path))
elif len(os.listdir(path)) > 0:
# refuse to replace a directory that has files in it
module.fail_json(path=path, msg='the directory %s is not empty, refusing to convert it' % path)
elif prev_state in ['file', 'hard'] and not force:
module.fail_json(path=path, msg='refusing to convert between %s and %s for %s' % (prev_state, state, path))
if prev_state == 'absent':
changed = True
elif prev_state == 'link':
old_src = os.readlink(path)
if old_src != src:
changed = True
elif prev_state == 'hard':
if not (state == 'hard' and os.stat(path).st_ino == os.stat(src).st_ino):
changed = True
if not force:
module.fail_json(dest=path, src=src, msg='Cannot link, different hard link exists at destination')
elif prev_state in ['file', 'directory']:
changed = True
if not force:
module.fail_json(dest=path, src=src, msg='Cannot link, %s exists at destination' % prev_state)
else:
module.fail_json(dest=path, src=src, msg='unexpected position reached')
if changed and not module.check_mode:
if prev_state != 'absent':
# try to replace atomically
tmppath = '/'.join([os.path.dirname(path), ".%s.%s.tmp" % (os.getpid(),time.time())])
try:
if prev_state == 'directory' and (state == 'hard' or state == 'link'):
os.rmdir(path)
if state == 'hard':
os.link(src,tmppath)
else:
os.symlink(src, tmppath)
os.rename(tmppath, path)
except OSError, e:
if os.path.exists(tmppath):
os.unlink(tmppath)
module.fail_json(path=path, msg='Error while replacing: %s' % str(e))
else:
try:
if state == 'hard':
os.link(src,path)
else:
os.symlink(src, path)
except OSError, e:
module.fail_json(path=path, msg='Error while linking: %s' % str(e))
if module.check_mode and not os.path.exists(path):
module.exit_json(dest=path, src=src, changed=changed)
changed = module.set_fs_attributes_if_different(file_args, changed)
module.exit_json(dest=path, src=src, changed=changed)
elif state == 'touch':
if not module.check_mode:
if prev_state == 'absent':
try:
open(path, 'w').close()
except OSError, e:
module.fail_json(path=path, msg='Error, could not touch target: %s' % str(e))
elif prev_state in ['file', 'directory']:
try:
os.utime(path, None)
except OSError, e:
module.fail_json(path=path, msg='Error while touching existing target: %s' % str(e))
else:
module.fail_json(msg='Cannot touch other than files and directories')
try:
module.set_fs_attributes_if_different(file_args, True)
except SystemExit, e:
if e.code:
# We take this to mean that fail_json() was called from
# somewhere in basic.py
if prev_state == 'absent':
# If we just created the file we can safely remove it
os.remove(path)
raise e
module.exit_json(dest=path, changed=True)
module.fail_json(path=path, msg='unexpected position reached')
# import module snippets
from ansible.module_utils.basic import *
main()
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