valhallasw added a comment.
This was the cause:
https://github.com/phacility/libphutil/blob/master/src/daemon/PhutilDaemon.php#L47
```
if (!posix_isatty(STDOUT)) {
posix_kill(posix_getppid(), SIGUSR1);
}
```
Apparently SIGUSR1 is used to tell the parent process the child is still
alive... but the default SIGUSR1 action is 'exit'.
Fixing this with
```
function on_USR1()
{
echo Received SIGUSR1
}
trap on_USR1 USR1
```
means the process doesn't disappear anymore, but the bot is also not killed
with qdel. Why did the Phabricator team decide to re-invent the wheel...?
Few other options I've tried:
- script. Doesn't work at all.
- script-with-screen. Same
- using phd with an on_EXIT handler:
```
function on_EXIT()
{
echo Stopping all daemons...
phabricator/bin/phd stop
echo Done.
}
function on_USR1()
{
echo Received SIGUSR1
}
trap on_USR1 USR1
trap on_EXIT EXIT
echo Starting daemon via PHD!
phabricator/bin/phd launch phabricatorbot `pwd`/phab_config.json
echo Started. Sleep for ALL times!
```
Starting works, killing doesn't.
TASK DETAIL
https://phabricator.wikimedia.org/T573
REPLY HANDLER ACTIONS
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To: valhallasw
Cc: wikibugs-l, Aklapper, chasemp, mmodell, Qgil, Dzahn, greg, Legoktm, Elitre,
valhallasw, Eloquence, Liuxinyu970226, Ladsgroup, Jdforrester-WMF, scfc, Revi,
jeremyb
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