740 lines
22 KiB
Python
740 lines
22 KiB
Python
#!/usr/bin/python
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# -*- coding: utf-8 -*-
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# (c) 2012, Red Hat, inc
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# Written by Seth Vidal
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# based on the mount modules from salt and puppet
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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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from ansible.module_utils._text import to_native
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from ansible.module_utils.basic import AnsibleModule
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from ansible.module_utils.basic import get_platform
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from ansible.module_utils.ismount import ismount
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from ansible.module_utils.pycompat24 import get_exception
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from ansible.module_utils.six import iteritems
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import os
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ANSIBLE_METADATA = {'status': ['preview'],
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'supported_by': 'core',
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'version': '1.0'}
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DOCUMENTATION = '''
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---
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module: mount
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short_description: Control active and configured mount points
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description:
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- This module controls active and configured mount points in C(/etc/fstab).
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author:
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- Ansible Core Team
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- Seth Vidal
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version_added: "0.6"
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options:
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name:
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description:
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- Path to the mount point (e.g. C(/mnt/files))
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required: true
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src:
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description:
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- Device to be mounted on I(name). Required when I(state) set to
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C(present) or C(mounted).
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required: false
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default: null
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fstype:
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description:
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- Filesystem type. Required when I(state) is C(present) or C(mounted).
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required: false
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default: null
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opts:
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description:
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- Mount options (see fstab(5), or vfstab(4) on Solaris).
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required: false
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default: null
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dump:
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description:
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- Dump (see fstab(5)). Note that if set to C(null) and I(state) set to
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C(present), it will cease to work and duplicate entries will be made
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with subsequent runs.
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- Has no effect on Solaris systems.
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required: false
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default: 0
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passno:
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description:
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- Passno (see fstab(5)). Note that if set to C(null) and I(state) set to
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C(present), it will cease to work and duplicate entries will be made
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with subsequent runs.
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- Deprecated on Solaris systems.
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required: false
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default: 0
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state:
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description:
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- If C(mounted) or C(unmounted), the device will be actively mounted or
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unmounted as needed and appropriately configured in I(fstab).
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- C(absent) and C(present) only deal with I(fstab) but will not affect
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current mounting.
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- If specifying C(mounted) and the mount point is not present, the mount
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point will be created.
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- Similarly, specifying C(absent) will remove the mount point directory.
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required: true
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choices: ["present", "absent", "mounted", "unmounted"]
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fstab:
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description:
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- File to use instead of C(/etc/fstab). You shouldn't use this option
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unless you really know what you are doing. This might be useful if
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you need to configure mountpoints in a chroot environment. OpenBSD
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does not allow specifying alternate fstab files with mount so do not
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use this on OpenBSD with any state that operates on the live filesystem.
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required: false
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default: /etc/fstab (/etc/vfstab on Solaris)
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boot:
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version_added: 2.2
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description:
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- Determines if the filesystem should be mounted on boot.
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- Only applies to Solaris systems.
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required: false
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default: yes
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choices: ["yes", "no"]
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'''
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EXAMPLES = '''
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- name: Mount DVD read-only
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mount:
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name: /mnt/dvd
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src: /dev/sr0
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fstype: iso9660
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opts: ro
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state: present
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- name: Mount up device by label
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mount:
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name: /srv/disk
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src: LABEL=SOME_LABEL
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fstype: ext4
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state: present
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- name: Mount up device by UUID
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mount:
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name: /home
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src: UUID=b3e48f45-f933-4c8e-a700-22a159ec9077
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fstype: xfs
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opts: noatime
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state: present
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'''
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def write_fstab(lines, dest):
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fs_w = open(dest, 'w')
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for l in lines:
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fs_w.write(l)
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fs_w.flush()
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fs_w.close()
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def _escape_fstab(v):
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"""Escape invalid characters in fstab fields.
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space (040)
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ampersand (046)
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backslash (134)
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"""
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if isinstance(v, int):
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return v
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else:
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return(
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v.
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replace('\\', '\\134').
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replace(' ', '\\040').
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replace('&', '\\046'))
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def set_mount(module, args):
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"""Set/change a mount point location in fstab."""
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to_write = []
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exists = False
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changed = False
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escaped_args = dict([(k, _escape_fstab(v)) for k, v in iteritems(args)])
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new_line = '%(src)s %(name)s %(fstype)s %(opts)s %(dump)s %(passno)s\n'
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if get_platform() == 'SunOS':
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new_line = (
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'%(src)s - %(name)s %(fstype)s %(passno)s %(boot)s %(opts)s\n')
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for line in open(args['fstab'], 'r').readlines():
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if not line.strip():
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to_write.append(line)
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continue
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if line.strip().startswith('#'):
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to_write.append(line)
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continue
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# Check if we got a valid line for splitting
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if (
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get_platform() == 'SunOS' and len(line.split()) != 7 or
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get_platform() != 'SunOS' and len(line.split()) != 6):
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to_write.append(line)
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continue
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ld = {}
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if get_platform() == 'SunOS':
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(
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ld['src'],
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dash,
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ld['name'],
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ld['fstype'],
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ld['passno'],
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ld['boot'],
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ld['opts']
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) = line.split()
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else:
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(
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ld['src'],
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ld['name'],
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ld['fstype'],
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ld['opts'],
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ld['dump'],
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ld['passno']
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) = line.split()
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# Check if we found the correct line
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if ld['name'] != escaped_args['name']:
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to_write.append(line)
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continue
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# If we got here we found a match - let's check if there is any
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# difference
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exists = True
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args_to_check = ('src', 'fstype', 'opts', 'dump', 'passno')
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if get_platform() == 'SunOS':
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args_to_check = ('src', 'fstype', 'passno', 'boot', 'opts')
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for t in args_to_check:
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if ld[t] != escaped_args[t]:
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ld[t] = escaped_args[t]
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changed = True
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if changed:
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to_write.append(new_line % ld)
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else:
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to_write.append(line)
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if not exists:
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to_write.append(new_line % escaped_args)
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changed = True
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if changed and not module.check_mode:
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write_fstab(to_write, args['fstab'])
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return (args['name'], changed)
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def unset_mount(module, args):
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"""Remove a mount point from fstab."""
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to_write = []
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changed = False
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escaped_name = _escape_fstab(args['name'])
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for line in open(args['fstab'], 'r').readlines():
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if not line.strip():
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to_write.append(line)
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continue
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if line.strip().startswith('#'):
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to_write.append(line)
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continue
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# Check if we got a valid line for splitting
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if (
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get_platform() == 'SunOS' and len(line.split()) != 7 or
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get_platform() != 'SunOS' and len(line.split()) != 6):
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to_write.append(line)
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continue
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ld = {}
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if get_platform() == 'SunOS':
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(
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ld['src'],
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dash,
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ld['name'],
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ld['fstype'],
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ld['passno'],
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ld['boot'],
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ld['opts']
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) = line.split()
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else:
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(
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ld['src'],
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ld['name'],
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ld['fstype'],
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ld['opts'],
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ld['dump'],
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ld['passno']
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) = line.split()
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if ld['name'] != escaped_name:
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to_write.append(line)
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continue
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# If we got here we found a match - continue and mark changed
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changed = True
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if changed and not module.check_mode:
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write_fstab(to_write, args['fstab'])
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return (args['name'], changed)
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def _set_fstab_args(fstab_file):
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result = []
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if fstab_file and fstab_file != '/etc/fstab':
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if get_platform().lower().endswith('bsd'):
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result.append('-F')
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else:
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result.append('-T')
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result.append(fstab_file)
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return result
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def mount(module, args):
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"""Mount up a path or remount if needed."""
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mount_bin = module.get_bin_path('mount', required=True)
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name = args['name']
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cmd = [mount_bin]
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if ismount(name):
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return remount(module, mount_bin, args)
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if get_platform().lower() == 'openbsd':
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# Use module.params['fstab'] here as args['fstab'] has been set to the
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# default value.
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if module.params['fstab'] is not None:
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module.fail_json(msg='OpenBSD does not support alternate fstab files. Do not specify the fstab parameter for OpenBSD hosts')
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else:
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cmd += _set_fstab_args(args['fstab'])
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cmd += [name]
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rc, out, err = module.run_command(cmd)
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if rc == 0:
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return 0, ''
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else:
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return rc, out+err
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def umount(module, dest):
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"""Unmount a path."""
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umount_bin = module.get_bin_path('umount', required=True)
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cmd = [umount_bin, dest]
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rc, out, err = module.run_command(cmd)
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if rc == 0:
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return 0, ''
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else:
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return rc, out+err
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def remount(module, mount_bin, args):
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''' will try to use -o remount first and fallback to unmount/mount if unsupported'''
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msg = ''
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cmd = [mount_bin]
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# multiplatform remount opts
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if get_platform().lower().endswith('bsd'):
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cmd += ['-u']
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else:
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cmd += ['-o', 'remount' ]
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if get_platform().lower() == 'openbsd':
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# Use module.params['fstab'] here as args['fstab'] has been set to the
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# default value.
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if module.params['fstab'] is not None:
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module.fail_json(msg='OpenBSD does not support alternate fstab files. Do not specify the fstab parameter for OpenBSD hosts')
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else:
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cmd += _set_fstab_args(args['fstab'])
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cmd += [ args['name'], ]
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out = err = ''
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try:
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if get_platform().lower().endswith('bsd'):
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# Note: Forcing BSDs to do umount/mount due to BSD remount not
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# working as expected (suspect bug in the BSD mount command)
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# Interested contributor could rework this to use mount options on
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# the CLI instead of relying on fstab
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# https://github.com/ansible/ansible-modules-core/issues/5591
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rc = 1
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else:
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rc, out, err = module.run_command(cmd)
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except:
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rc = 1
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if rc != 0:
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msg = out + err
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if ismount(args['name']):
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rc, msg = umount(module, args['name'])
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if rc == 0:
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rc, msg = mount(module, args)
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return rc, msg
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# Note if we wanted to put this into module_utils we'd have to get permission
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# from @jupeter -- https://github.com/ansible/ansible-modules-core/pull/2923
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# @jtyr -- https://github.com/ansible/ansible-modules-core/issues/4439
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# and @abadger to relicense from GPLv3+
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def is_bind_mounted(module, linux_mounts, dest, src=None, fstype=None):
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"""Return whether the dest is bind mounted
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:arg module: The AnsibleModule (used for helper functions)
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:arg dest: The directory to be mounted under. This is the primary means
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of identifying whether the destination is mounted.
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:kwarg src: The source directory. If specified, this is used to help
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ensure that we are detecting that the correct source is mounted there.
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:kwarg fstype: The filesystem type. If specified this is also used to
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help ensure that we are detecting the right mount.
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:kwarg linux_mounts: Cached list of mounts for Linux.
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:returns: True if the dest is mounted with src otherwise False.
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"""
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is_mounted = False
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if get_platform() == 'Linux' and linux_mounts is not None:
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if src is None:
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# That's for unmounted/absent
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if dest in linux_mounts:
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is_mounted = True
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else:
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# That's for mounted
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if dest in linux_mounts and linux_mounts[dest]['src'] == src:
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is_mounted = True
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else:
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bin_path = module.get_bin_path('mount', required=True)
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cmd = '%s -l' % bin_path
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rc, out, err = module.run_command(cmd)
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mounts = []
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if len(out):
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mounts = to_native(out).strip().split('\n')
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for mnt in mounts:
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arguments = mnt.split()
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if (
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(arguments[0] == src or src is None) and
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arguments[2] == dest and
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(arguments[4] == fstype or fstype is None)):
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is_mounted = True
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if is_mounted:
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break
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return is_mounted
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def get_linux_mounts(module):
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"""Gather mount information"""
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mntinfo_file = "/proc/self/mountinfo"
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try:
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f = open(mntinfo_file)
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except IOError:
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return
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lines = map(str.strip, f.readlines())
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try:
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f.close()
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except IOError:
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module.fail_json(msg="Cannot close file %s" % mntinfo_file)
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mntinfo = []
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for line in lines:
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fields = line.split()
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record = {
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'root': fields[3],
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'dst': fields[4],
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'opts': fields[5],
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'fields': fields[6:-4],
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'fs': fields[-3],
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'src': fields[-2],
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}
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mntinfo.append(record)
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mounts = {}
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for i, mnt in enumerate(mntinfo):
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src = mnt['src']
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if mnt['fs'] == 'tmpfs' and mnt['root'] != '/':
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# == Example:
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# 65 19 0:35 / /tmp rw shared:25 - tmpfs tmpfs rw
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# 210 65 0:35 /aaa /tmp/bbb rw shared:25 - tmpfs tmpfs rw
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# == Expected result:
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# src=/tmp/aaa
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# ==
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shared = None
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# Search for the shared field
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for fld in mnt['fields']:
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if fld.startswith('shared'):
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shared = fld
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if shared is None:
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continue
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dest = None
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# Search fo the record with the same field
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for j, m in enumerate(mntinfo):
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if j < i:
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if shared in m['fields']:
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dest = m['dst']
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else:
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break
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if dest is not None:
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src = "%s%s" % (dest, mnt['root'])
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else:
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continue
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elif mnt['root'] != '/' and len(mnt['fields']) > 0:
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# == Example:
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# 67 19 8:18 / /mnt/disk2 rw shared:26 - ext4 /dev/sdb2 rw
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# 217 65 8:18 /test /tmp/ccc rw shared:26 - ext4 /dev/sdb2 rw
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# == Expected result:
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# src=/mnt/disk2/test
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# ==
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# Search for parent
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for j, m in enumerate(mntinfo):
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if j < i:
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if m['src'] == mnt['src']:
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src = "%s%s" % (m['dst'], mnt['root'])
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else:
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break
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elif mnt['root'] != '/' and len(mnt['fields']) == 0:
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# == Example 1:
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# 27 20 8:1 /tmp/aaa /tmp/bbb rw - ext4 /dev/sdb2 rw
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# == Example 2:
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# 204 136 253:2 /rootfs / rw - ext4 /dev/sdb2 rw
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# 141 140 253:2 /rootfs/tmp/aaa /tmp/bbb rw - ext4 /dev/sdb2 rw
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# == Expected result:
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# src=/tmp/aaa
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# ==
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src = mnt['root']
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# Search for parent
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for j, m in enumerate(mntinfo):
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if j < i:
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if (
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m['src'] == mnt['src'] and
|
|
mnt['root'].startswith(m['root'])):
|
|
src = src.replace("%s/" % m['root'], '/', 1)
|
|
else:
|
|
break
|
|
|
|
mounts[mnt['dst']] = {
|
|
'src': src,
|
|
'opts': mnt['opts'],
|
|
'fs': mnt['fs']
|
|
}
|
|
|
|
return mounts
|
|
|
|
|
|
def main():
|
|
module = AnsibleModule(
|
|
argument_spec=dict(
|
|
boot=dict(default='yes', choices=['yes', 'no']),
|
|
dump=dict(),
|
|
fstab=dict(default=None),
|
|
fstype=dict(),
|
|
name=dict(required=True, type='path'),
|
|
opts=dict(),
|
|
passno=dict(type='str'),
|
|
src=dict(type='path'),
|
|
state=dict(
|
|
required=True,
|
|
choices=['present', 'absent', 'mounted', 'unmounted']),
|
|
),
|
|
supports_check_mode=True,
|
|
required_if=(
|
|
['state', 'mounted', ['src', 'fstype']],
|
|
['state', 'present', ['src', 'fstype']]
|
|
)
|
|
)
|
|
|
|
changed = False
|
|
# solaris args:
|
|
# name, src, fstype, opts, boot, passno, state, fstab=/etc/vfstab
|
|
# linux args:
|
|
# name, src, fstype, opts, dump, passno, state, fstab=/etc/fstab
|
|
# Note: Do not modify module.params['fstab'] as we need to know if the user
|
|
# explicitly specified it in mount() and remount()
|
|
if get_platform().lower() == 'sunos':
|
|
args = dict(
|
|
name=module.params['name'],
|
|
opts='-',
|
|
passno='-',
|
|
fstab=module.params['fstab'],
|
|
boot='yes'
|
|
)
|
|
if args['fstab'] is None:
|
|
args['fstab'] = '/etc/vfstab'
|
|
else:
|
|
args = dict(
|
|
name=module.params['name'],
|
|
opts='defaults',
|
|
dump='0',
|
|
passno='0',
|
|
fstab=module.params['fstab']
|
|
)
|
|
if args['fstab'] is None:
|
|
args['fstab'] = '/etc/fstab'
|
|
|
|
# FreeBSD doesn't have any 'default' so set 'rw' instead
|
|
if get_platform() == 'FreeBSD':
|
|
args['opts'] = 'rw'
|
|
|
|
linux_mounts = []
|
|
|
|
# Cache all mounts here in order we have consistent results if we need to
|
|
# call is_bind_mouted() multiple times
|
|
if get_platform() == 'Linux':
|
|
linux_mounts = get_linux_mounts(module)
|
|
|
|
if linux_mounts is None:
|
|
args['warnings'] = (
|
|
'Cannot open file /proc/self/mountinfo. '
|
|
'Bind mounts might be misinterpreted.')
|
|
|
|
# Override defaults with user specified params
|
|
for key in ('src', 'fstype', 'passno', 'opts', 'dump', 'fstab'):
|
|
if module.params[key] is not None:
|
|
args[key] = module.params[key]
|
|
|
|
# If fstab file does not exist, we first need to create it. This mainly
|
|
# happens when fstab option is passed to the module.
|
|
if not os.path.exists(args['fstab']):
|
|
if not os.path.exists(os.path.dirname(args['fstab'])):
|
|
os.makedirs(os.path.dirname(args['fstab']))
|
|
|
|
open(args['fstab'], 'a').close()
|
|
|
|
# absent:
|
|
# Remove from fstab and unmounted.
|
|
# unmounted:
|
|
# Do not change fstab state, but unmount.
|
|
# present:
|
|
# Add to fstab, do not change mount state.
|
|
# mounted:
|
|
# Add to fstab if not there and make sure it is mounted. If it has
|
|
# changed in fstab then remount it.
|
|
|
|
state = module.params['state']
|
|
name = module.params['name']
|
|
|
|
if state == 'absent':
|
|
name, changed = unset_mount(module, args)
|
|
|
|
if changed and not module.check_mode:
|
|
if ismount(name) or is_bind_mounted(module, linux_mounts, name):
|
|
res, msg = umount(module, name)
|
|
|
|
if res:
|
|
module.fail_json(
|
|
msg="Error unmounting %s: %s" % (name, msg))
|
|
|
|
if os.path.exists(name):
|
|
try:
|
|
os.rmdir(name)
|
|
except (OSError, IOError):
|
|
e = get_exception()
|
|
module.fail_json(msg="Error rmdir %s: %s" % (name, str(e)))
|
|
elif state == 'unmounted':
|
|
if ismount(name) or is_bind_mounted(module, linux_mounts, name):
|
|
if not module.check_mode:
|
|
res, msg = umount(module, name)
|
|
|
|
if res:
|
|
module.fail_json(
|
|
msg="Error unmounting %s: %s" % (name, msg))
|
|
|
|
changed = True
|
|
elif state == 'mounted':
|
|
if not os.path.exists(name) and not module.check_mode:
|
|
try:
|
|
os.makedirs(name)
|
|
except (OSError, IOError):
|
|
e = get_exception()
|
|
module.fail_json(
|
|
msg="Error making dir %s: %s" % (name, str(e)))
|
|
|
|
name, changed = set_mount(module, args)
|
|
res = 0
|
|
|
|
if ismount(name):
|
|
if changed and not module.check_mode:
|
|
res, msg = mount(module, args)
|
|
changed = True
|
|
elif 'bind' in args.get('opts', []):
|
|
changed = True
|
|
|
|
if is_bind_mounted( module, linux_mounts, name, args['src'], args['fstype']):
|
|
changed = False
|
|
|
|
if changed and not module.check_mode:
|
|
res, msg = mount(module, args)
|
|
else:
|
|
changed = True
|
|
|
|
if not module.check_mode:
|
|
res, msg = mount(module, args)
|
|
|
|
if res:
|
|
module.fail_json(msg="Error mounting %s: %s" % (name, msg))
|
|
elif state == 'present':
|
|
name, changed = set_mount(module, args)
|
|
else:
|
|
module.fail_json(msg='Unexpected position reached')
|
|
|
|
module.exit_json(changed=changed, **args)
|
|
|
|
|
|
if __name__ == '__main__':
|
|
main()
|