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allow configuration of a pre-execution hook for arbitrary conditions #56

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allow configuration of a pre-execution hook for arbitrary conditions #56

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9 changes: 9 additions & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -261,6 +261,15 @@ Supported Options Reference
```
The default is an empty list which means updates are applied every day.

* `Unattended-Upgrade::Special-Conditions-Script` - path to a script on which to make execution dependent

Allows the definition of arbitrary conditions for update execution.
If set, the given script is executed. If it returns 0, unattended-upgrades proceeds, otherwise it stops.

Example - apply updates only with Ethernet and AC Power connected
```
Unattended-Upgrade::Special-Conditions-Script "/home/me/scripts/check-eth-and-ac-connected.sh";
```

* `Unattended-Upgrade::SyslogEnable` - boolean (default:False)

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6 changes: 6 additions & 0 deletions unattended-upgrade
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Expand Up @@ -1200,6 +1200,12 @@ def main(options, rootdir=""):
if not is_update_day():
return

specialCondScript = apt_pkg.config.find("Unattended-Upgrade::Special-Conditions-Script", "")
if specialCondScript:
if subprocess.call([specialCondScript]) != 0:
logging.info("The script configured with Unattended-Upgrade::Special-Conditions-Script didn't return 0, stopping here!")
return

# format (origin, archive), e.g. ("Ubuntu","dapper-security")
allowed_origins = get_allowed_origins()

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