[systemd-devel] empty a directory in service file as ExecStartPre

[Mantas Mikulėnas]

ExecStart does not go through a shell, so it won't expand wildcards.

Try running 'find /dir -mindepth 1 -delete', that also cleans up dotdirs.

Alternatively 'sh -c "rm .../*" to handle wildcards.

On Sat, Jan 2, 2016, 13:39 arnaud gaboury <arnaud.gaboury at gmail.com> wrote:

> I can't manage to empty a directory as a Exec in a service file. Here is
> part:
>
> ---------------------------------------------------------------
> [Service]
> User=postgres
> Environment=REPORTDIR=/storage/psqlReport
> ExecStartPre=/usr/bin/rm -f ${REPORTDIR}/*
> ExecStart=MyCommand
>
> --------------------------------------------------
>
> $ journalctl -xe -l
> -------------------------------
> -- Unit pgcluu_collectd.service has begun starting up.
> Jan 02 12:34:02 poppy pgcluu_collectd[21593]: *** pgcluu_collectd v2.4
> (pid:21593) started at Sat Jan  2 12:34:02 2016
> Jan 02 12:34:02 poppy pgcluu_collectd[21593]: Type Ctrl+c to quit.
> Jan 02 12:34:02 poppy pgcluu[21594]: FATAL: output directory
> /storage/psqlReport is not empty. at /usr/bin/pgcluu line 1033.
> Jan 02 12:34:02 poppy systemd[1]: pgcluu_collectd.service: Control
> process exited, code=exited status=2
> -------------------------------------------------
>
> Running manually the rm command as user postgres empty the directory,
> but when in service file, the directory is still full. I see it as
> ExecStart=MyCommand complains the directory is full and service exits
> with an error.
> User postgres has of course rw access to directory content.
> No any kind of interactive prompt when running rm.
> If I start the service with an empty /storage/psqlReport, service success.
>
> What am I missing? Is there a better way to empty the directory before
> running my command ? The service will be timered, so can't empty
> manually.
>
> Thank you for help.
>
> --
>
> google.com/+arnaudgabourygabx
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>
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