Re: Correct pexp variable for a shell script

On 6/22/19 7:05 AM, Antoine Jacoutot wrote:
> On Fri, Jun 21, 2019 at 03:57:41PM -0400, Jacob Adams wrote:
>> I've got a shell script I'd like to run as a system service. Due to the
>> 16 character limitation on pgrep and the -x flag that rc.subr passes to
>> check by default, I can't get check or stop to work correctly. The
>> problem is that the process name looks like "/bin/sh
>> /usr/local/bin/script.sh" which, even if passed to pgrep, won't match
>> when -x is used.
>>
>> My rc.d script currently looks like this:
>>
> Hi.
>
> That should not be an issue, that's why pexp is used for.
> But without more context it's hard to know how to help you.
>
> I can match sh scripts without issue:
> $ pgrep -xf "/bin/sh /etc/gdm/Xsession /usr/local/bin/gnome-session"
> 77289
>
> Are you sure your entire process line is "bin/sh /usr/local/bin/authmail"?
> We don't run into the 16 chars limitation when using -xf


Here's what I was seeing that led me to that conclusion:

rukey$ ps aux | grep authmail
root     51889  0.0  0.1   724   568 p0- Ip    Fri12AM    0:00.01
/bin/sh /usr/local/bin/authmail
jacob    25510  0.0  0.2   272   892 p0  S+p   10:36AM    0:00.01 grep
authmail
rukey$ pgrep -f /bin/sh /usr/local/bin/authmail
51889
rukey$ pgrep -xf /bin/sh /usr/local/bin/authmail


However, I didn't think to quote it. that seems to fix it:

rukey$ pgrep -xf "/bin/sh /usr/local/bin/authmail"
51889

It appears that rc.subr uses quotes, but:

rukey# pgrep -xf "/bin/sh /usr/local/bin/authmail"
51889
rukey# rcctl check authmail
authmail(failed)
rukey#

Any idea what could be going wrong here?


Thanks,
Jacob