Search and remove string that matches a pattern at beginning of a line

[Chris Bidwell - NOAA Federal]

Hey all,

Interesting question here.  I want to remove the string noexec out of a line in my /etc/fstab.  In this instance, I only want it to be in the /tmp line.  

I was thinking a replace module, but not sure about a regexp that would work.  Any thoughts?

#
# /etc/fstab
# Created by anaconda on Tue Nov  3 01:51:55 2020
#
# Accessible filesystems, by reference, are maintained under '/dev/disk/'.
# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info.
#
# After editing this file, run 'systemctl daemon-reload' to update systemd
# units generated from this file.
#
/dev/mapper/vg_rhel-root /                       xfs     defaults        0 0
UUID=3da5b7f5-fc36-4e8f-beb4-d270d3dff5f8 /boot ext4 defaults,nosuid,nodev 0 0
/dev/mapper/vg_rhel-home /home xfs defaults,nosuid,nodev 0 0
/dev/mapper/vg_rhel-opt /opt                    xfs     defaults        0 0
/dev/mapper/vg_rhel-tmp /tmp xfs defaults,noexec,nodev,nosuid 0 0
/dev/mapper/vg_rhel-usr /usr                    xfs     defaults        0 0
/dev/mapper/vg_rhel-usr_local /usr/local              xfs     defaults        0 0
/dev/mapper/vg_rhel-var /var xfs defaults,nodev 0 0
/dev/mapper/vg_rhel-var_lib_docker /var/lib/docker         xfs     defaults        0 0
/dev/mapper/vg_rhel-var_log /var/log xfs defaults,nodev,noexec,nosuid 0 0
/dev/mapper/vg_rhel-var_log_audit /var/log/audit xfs defaults,nodev,noexec,nosuid 0 0
/dev/mapper/vg_rhel-var_tmp /var/tmp xfs defaults,noexec,nosuid,nodev 0 0
/dev/mapper/vg_rhel-swap swap                    swap    defaults        0 0
tmpfs /dev/shm tmpfs rw,nosuid,nodev,noexec,seclabel 0 0

[Dick Visser]

Try this:

tasks:
- slurp:
src: /etc/fstab
register: fstab64

- set_fact:
tmp_parts: "{{ (fstab64.content|b64decode |
regex_search('.*\\S+\\s+\/tmp\\s+\\S+\\s+.*')).split() }}"

- mount:
fstab: /etc/fstab
state: present
path: "{{ tmp_parts[1] }}"
src: "{{ tmp_parts[0] }}"
opts: "{{ tmp_parts[3].split(',')|difference(['noexec'])|join(',') }}"
fstype: "{{ tmp_parts[2] }}"

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[Lars Liedtke]

Hey,

You could use the lineinfile-module.

With something like:

lineinfile:
  regexp: "^/dev/mapper/vg_rhel-var_tmp"
  line: "/dev/mapper/vg_rhel-var_tmp /var/tmp xfs defaults,noexec,nosuid,nodev 0 0"

Take into account that the regexp definition has to match __before__ and __after__ replacement

Cheers

Lars

Am 03.11.20 um 05:14 schrieb 'Chris Bidwell - NOAA Federal' via Ansible Project:

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[Lars Liedtke]

Of course I made a copy&paste error:

the line definition must be without the noexec then ;-)

Am 03.11.20 um 17:21 schrieb Lars Liedtke:

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