910728f6c3
If we try to make a directory, but someone else creates the directory at the same time as us, we don't need to raise that error to the user. They asked for the directory to exist, and now it does. This fixes the race condition which was causing that error to be raised, and closes #1648.
412 lines
16 KiB
Python
412 lines
16 KiB
Python
#!/usr/bin/python
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# -*- coding: utf-8 -*-
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# (c) 2012, Michael DeHaan <michael.dehaan@gmail.com>
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#
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# This file is part of Ansible
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#
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# Ansible is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Ansible is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with Ansible. If not, see <http://www.gnu.org/licenses/>.
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import errno
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import shutil
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import stat
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import grp
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import pwd
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try:
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import selinux
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HAVE_SELINUX=True
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except ImportError:
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HAVE_SELINUX=False
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DOCUMENTATION = '''
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---
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module: file
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version_added: "historical"
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short_description: Sets attributes of files
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extends_documentation_fragment: files
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description:
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- Sets attributes of files, symlinks, and directories, or removes
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files/symlinks/directories. Many other modules support the same options as
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the M(file) module - including M(copy), M(template), and M(assemble).
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notes:
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- See also M(copy), M(template), M(assemble)
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requirements: [ ]
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author:
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- "Ansible Core Team"
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- "Michael DeHaan"
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options:
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path:
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description:
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- 'path to the file being managed. Aliases: I(dest), I(name)'
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required: true
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default: []
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aliases: ['dest', 'name']
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state:
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description:
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- If C(directory), all immediate subdirectories will be created if they
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do not exist, since 1.7 they will be created with the supplied permissions.
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If C(file), the file will NOT be created if it does not exist, see the M(copy)
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or M(template) module if you want that behavior. If C(link), the symbolic
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link will be created or changed. Use C(hard) for hardlinks. If C(absent),
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directories will be recursively deleted, and files or symlinks will be unlinked.
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If C(touch) (new in 1.4), an empty file will be created if the C(path) does not
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exist, while an existing file or directory will receive updated file access and
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modification times (similar to the way `touch` works from the command line).
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required: false
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default: file
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choices: [ file, link, directory, hard, touch, absent ]
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src:
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required: false
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default: null
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description:
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- path of the file to link to (applies only to C(state=link)). Will accept absolute,
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relative and nonexisting paths. Relative paths are not expanded.
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recurse:
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required: false
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default: "no"
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choices: [ "yes", "no" ]
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version_added: "1.1"
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description:
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- recursively set the specified file attributes (applies only to state=directory)
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force:
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required: false
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default: "no"
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choices: [ "yes", "no" ]
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description:
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- 'force the creation of the symlinks in two cases: the source file does
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not exist (but will appear later); the destination exists and is a file (so, we need to unlink the
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"path" file and create symlink to the "src" file in place of it).'
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'''
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EXAMPLES = '''
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# change file ownership, group and mode. When specifying mode using octal numbers, first digit should always be 0.
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- file: path=/etc/foo.conf owner=foo group=foo mode=0644
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- file: src=/file/to/link/to dest=/path/to/symlink owner=foo group=foo state=link
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- file: src=/tmp/{{ item.path }} dest={{ item.dest }} state=link
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with_items:
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- { path: 'x', dest: 'y' }
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- { path: 'z', dest: 'k' }
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# touch a file, using symbolic modes to set the permissions (equivalent to 0644)
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- file: path=/etc/foo.conf state=touch mode="u=rw,g=r,o=r"
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# touch the same file, but add/remove some permissions
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- file: path=/etc/foo.conf state=touch mode="u+rw,g-wx,o-rwx"
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# create a directory if it doesn't exist
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- file: path=/etc/some_directory state=directory mode=0755
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'''
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def get_state(path):
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''' Find out current state '''
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if os.path.lexists(path):
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if os.path.islink(path):
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return 'link'
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elif os.path.isdir(path):
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return 'directory'
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elif os.stat(path).st_nlink > 1:
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return 'hard'
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else:
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# could be many other things, but defaulting to file
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return 'file'
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return 'absent'
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def recursive_set_attributes(module, path, follow, file_args):
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changed = False
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for root, dirs, files in os.walk(path):
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for fsobj in dirs + files:
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fsname = os.path.join(root, fsobj)
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if not os.path.islink(fsname):
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tmp_file_args = file_args.copy()
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tmp_file_args['path']=fsname
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changed |= module.set_fs_attributes_if_different(tmp_file_args, changed)
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else:
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tmp_file_args = file_args.copy()
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tmp_file_args['path']=fsname
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changed |= module.set_fs_attributes_if_different(tmp_file_args, changed)
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if follow:
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fsname = os.path.join(root, os.readlink(fsname))
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if os.path.isdir(fsname):
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changed |= recursive_set_attributes(module, fsname, follow, file_args)
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tmp_file_args = file_args.copy()
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tmp_file_args['path']=fsname
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changed |= module.set_fs_attributes_if_different(tmp_file_args, changed)
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return changed
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def main():
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module = AnsibleModule(
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argument_spec = dict(
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state = dict(choices=['file','directory','link','hard','touch','absent'], default=None),
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path = dict(aliases=['dest', 'name'], required=True),
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original_basename = dict(required=False), # Internal use only, for recursive ops
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recurse = dict(default=False, type='bool'),
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force = dict(required=False, default=False, type='bool'),
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diff_peek = dict(default=None),
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validate = dict(required=False, default=None),
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src = dict(required=False, default=None),
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),
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add_file_common_args=True,
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supports_check_mode=True
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)
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params = module.params
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state = params['state']
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force = params['force']
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diff_peek = params['diff_peek']
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src = params['src']
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follow = params['follow']
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# modify source as we later reload and pass, specially relevant when used by other modules.
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params['path'] = path = os.path.expanduser(params['path'])
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# short-circuit for diff_peek
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if diff_peek is not None:
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appears_binary = False
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try:
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f = open(path)
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b = f.read(8192)
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f.close()
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if "\x00" in b:
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appears_binary = True
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except:
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pass
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module.exit_json(path=path, changed=False, appears_binary=appears_binary)
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prev_state = get_state(path)
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# state should default to file, but since that creates many conflicts,
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# default to 'current' when it exists.
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if state is None:
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if prev_state != 'absent':
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state = prev_state
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else:
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state = 'file'
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# source is both the source of a symlink or an informational passing of the src for a template module
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# or copy module, even if this module never uses it, it is needed to key off some things
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if src is not None:
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src = os.path.expanduser(src)
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else:
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if state in ['link','hard']:
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if follow and state == 'link':
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# use the current target of the link as the source
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src = os.path.realpath(path)
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else:
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module.fail_json(msg='src and dest are required for creating links')
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# original_basename is used by other modules that depend on file.
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if os.path.isdir(path) and state not in ["link", "absent"]:
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basename = None
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if params['original_basename']:
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basename = params['original_basename']
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elif src is not None:
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basename = os.path.basename(src)
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if basename:
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params['path'] = path = os.path.join(path, basename)
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# make sure the target path is a directory when we're doing a recursive operation
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recurse = params['recurse']
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if recurse and state != 'directory':
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module.fail_json(path=path, msg="recurse option requires state to be 'directory'")
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file_args = module.load_file_common_arguments(params)
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changed = False
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if state == 'absent':
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if state != prev_state:
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if not module.check_mode:
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if prev_state == 'directory':
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try:
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shutil.rmtree(path, ignore_errors=False)
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except Exception, e:
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module.fail_json(msg="rmtree failed: %s" % str(e))
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else:
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try:
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os.unlink(path)
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except Exception, e:
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module.fail_json(path=path, msg="unlinking failed: %s " % str(e))
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module.exit_json(path=path, changed=True)
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else:
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module.exit_json(path=path, changed=False)
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elif state == 'file':
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if state != prev_state:
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if follow and prev_state == 'link':
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# follow symlink and operate on original
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path = os.path.realpath(path)
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prev_state = get_state(path)
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file_args['path'] = path
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if prev_state not in ['file','hard']:
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# file is not absent and any other state is a conflict
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module.fail_json(path=path, msg='file (%s) is %s, cannot continue' % (path, prev_state))
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changed = module.set_fs_attributes_if_different(file_args, changed)
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module.exit_json(path=path, changed=changed)
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elif state == 'directory':
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if follow and prev_state == 'link':
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path = os.path.realpath(path)
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prev_state = get_state(path)
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if prev_state == 'absent':
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if module.check_mode:
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module.exit_json(changed=True)
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changed = True
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curpath = ''
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# Split the path so we can apply filesystem attributes recursively
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# from the root (/) directory for absolute paths or the base path
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# of a relative path. We can then walk the appropriate directory
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# path to apply attributes.
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for dirname in path.strip('/').split('/'):
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curpath = '/'.join([curpath, dirname])
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# Remove leading slash if we're creating a relative path
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if not os.path.isabs(path):
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curpath = curpath.lstrip('/')
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if not os.path.exists(curpath):
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try:
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os.mkdir(curpath)
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except OSError, ex:
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# Possibly something else created the dir since the os.path.exists
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# check above. As long as it's a dir, we don't need to error out.
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if not (ex.errno == errno.EEXISTS and os.isdir(curpath)):
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raise
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tmp_file_args = file_args.copy()
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tmp_file_args['path']=curpath
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changed = module.set_fs_attributes_if_different(tmp_file_args, changed)
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# We already know prev_state is not 'absent', therefore it exists in some form.
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elif prev_state != 'directory':
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module.fail_json(path=path, msg='%s already exists as a %s' % (path, prev_state))
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changed = module.set_fs_attributes_if_different(file_args, changed)
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if recurse:
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changed |= recursive_set_attributes(module, file_args['path'], follow, file_args)
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module.exit_json(path=path, changed=changed)
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elif state in ['link','hard']:
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if os.path.isdir(path) and not os.path.islink(path):
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relpath = path
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else:
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relpath = os.path.dirname(path)
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absrc = os.path.join(relpath, src)
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if not os.path.exists(absrc) and not force:
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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)
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if state == 'hard':
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if not os.path.isabs(src):
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module.fail_json(msg="absolute paths are required")
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elif prev_state == 'directory':
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if not force:
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module.fail_json(path=path, msg='refusing to convert between %s and %s for %s' % (prev_state, state, path))
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elif len(os.listdir(path)) > 0:
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# refuse to replace a directory that has files in it
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module.fail_json(path=path, msg='the directory %s is not empty, refusing to convert it' % path)
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elif prev_state in ['file', 'hard'] and not force:
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module.fail_json(path=path, msg='refusing to convert between %s and %s for %s' % (prev_state, state, path))
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if prev_state == 'absent':
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changed = True
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elif prev_state == 'link':
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old_src = os.readlink(path)
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if old_src != src:
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changed = True
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elif prev_state == 'hard':
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if not (state == 'hard' and os.stat(path).st_ino == os.stat(src).st_ino):
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changed = True
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if not force:
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module.fail_json(dest=path, src=src, msg='Cannot link, different hard link exists at destination')
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elif prev_state in ['file', 'directory']:
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changed = True
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if not force:
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module.fail_json(dest=path, src=src, msg='Cannot link, %s exists at destination' % prev_state)
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else:
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module.fail_json(dest=path, src=src, msg='unexpected position reached')
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if changed and not module.check_mode:
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if prev_state != 'absent':
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# try to replace atomically
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tmppath = '/'.join([os.path.dirname(path), ".%s.%s.tmp" % (os.getpid(),time.time())])
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try:
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if prev_state == 'directory' and (state == 'hard' or state == 'link'):
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os.rmdir(path)
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if state == 'hard':
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os.link(src,tmppath)
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else:
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os.symlink(src, tmppath)
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os.rename(tmppath, path)
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except OSError, e:
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if os.path.exists(tmppath):
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os.unlink(tmppath)
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module.fail_json(path=path, msg='Error while replacing: %s' % str(e))
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else:
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try:
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if state == 'hard':
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os.link(src,path)
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else:
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os.symlink(src, path)
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except OSError, e:
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module.fail_json(path=path, msg='Error while linking: %s' % str(e))
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if module.check_mode and not os.path.exists(path):
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module.exit_json(dest=path, src=src, changed=changed)
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changed = module.set_fs_attributes_if_different(file_args, changed)
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module.exit_json(dest=path, src=src, changed=changed)
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elif state == 'touch':
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if not module.check_mode:
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if prev_state == 'absent':
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try:
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open(path, 'w').close()
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except OSError, e:
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module.fail_json(path=path, msg='Error, could not touch target: %s' % str(e))
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elif prev_state in ['file', 'directory', 'hard']:
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try:
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os.utime(path, None)
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except OSError, e:
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module.fail_json(path=path, msg='Error while touching existing target: %s' % str(e))
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else:
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module.fail_json(msg='Cannot touch other than files, directories, and hardlinks (%s is %s)' % (path, prev_state))
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try:
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module.set_fs_attributes_if_different(file_args, True)
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except SystemExit, e:
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if e.code:
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# We take this to mean that fail_json() was called from
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# somewhere in basic.py
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if prev_state == 'absent':
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# If we just created the file we can safely remove it
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os.remove(path)
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raise e
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module.exit_json(dest=path, changed=True)
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module.fail_json(path=path, msg='unexpected position reached')
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# import module snippets
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from ansible.module_utils.basic import *
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if __name__ == '__main__':
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main()
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