crontab hanging won't die on SIGTERM in jail

[Michael Scheidell]

this doesn't stop cron:

/etc/rc.d/cron stop
(just keeps spitting out the pid)

killall -SIGTERM cron (doesn't work)

killall -SIGQUIT|SIGKILL seems to work.


Workaround is this:

echo "sigstop=SIGQUIT" > /etc/rc.conf.d/cron

works fine now.


isn't needed in base, just in jail.



Michael Scheidell wrote:
> anyone having problems during an in jail shutdown with crontab hanging?
> I have seen this in 6.4 and 7.1, on i386 and amd64.
> I don't remember problems with 6.3
>
>
> using jailtools (jkill -r), OR
> shutdown -r +0
>
> OR
>
> reboot
> reboot: SIGTSTP init: No such process
>
> truss shows:
> truss -p 87553
> (null)()                                         = 0 (0x0)
> gettimeofday({1249567500.835698},0x0)            = 0 (0x0)
> stat("tabs",{mode=drwx------ ,inode=10458278,size=512,blksize=4096}) = 
> 0 (0x0)
> stat("/etc/crontab",{mode=-rw-r--r-- 
> ,inode=10461256,size=748,blksize=4096}) = 0 (0x0)
> gettimeofday({1249567500.836244},0x0)            = 0 (0x0)
> fork()                                           = 88217 (0x15899)
> gettimeofday({1249567500.836862},0x0)            = 0 (0x0)
> nanosleep({60.000000000})                        ERR#4 'Interrupted 
> system call'
> SIGNAL 20 (SIGCHLD)
> SIGNAL 20 (SIGCHLD)
> wait4(0xffffffff,0xbfbfe99c,0x1,0x0)             = 88217 (0x15899)
> wait4(0xffffffff,0xbfbfe99c,0x1,0x0)             ERR#10 'No child 
> processes'
> sigreturn(0xbfbfe9d0)                            ERR#4 'Interrupted 
> system call'
> gettimeofday({1249567500.842115},0x0)            = 0 (0x0)
>
>
> killall -SIGTERM cron
>
> (caused NO truss activity)
>
> it sees a HUP:
>
> killall -SIGHUP  cron
>
> truss:
> SIGNAL 1 (SIGHUP)
> (null)()                                         ERR#4 'Interrupted 
> system call'
> gettimeofday({17.000000},0x0)                    = 0 (0x0)
> (null)()                                         = 0 (0x0)
>
>
> SIGKILL will kill it.
>
>

-- 
Michael Scheidell, CTO
Phone: 561-999-5000, x 1259
 > *| *SECNAP Network Security Corporation

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