Summary: SunOS 4.1.3 cron core dump

Date: Tue Jan 10 1995 - 07:37:53 CST

Dear Sunners,
My original problem is:

> I have a SS10 running SunOS 4.1.3, when the system tries to invoke the cron daemon
> in system startup, the cron progam dumps a core file in the dir. of
> /var/spool/cron/crontabs, even though the file /var/spool/cron/FIFO is correctly
> created. Simply more the core file shows that there is some stuff like:
> /var/spool/cron/FIFOCan't access %s: %m/var/spool/cron/FIFOCan't start cron - another
> cron may be running (%s exists)/var/spool/cron/FIFO/var/spool/cron/FIFOCan't open %s:
> %m/var/spool/cron/FIFOTZTZ=%sTZ/var/spool/cron/crontabsCan't change directory to %s:
> %m/var/spool/cron/crontabs.Can't read %s:
> The error seems to be "/var/spool/cron/FIFO exists"!! However, when I try to delete
> this file and rerun cron manually, the core dump happens again with similar content.
> Any ideas or clues are greatly appreciated.
> Thanks a lot.

So far, I have received two replies:

Chris A. Wozniak (
Somehow the FIFO pipe in /var/spool/cron has got corrupt or isn't a pipe.
You need to recreate it with "mknod -p" command.

Jim Mintha <>
I had the same problem recently and it took the longest time to solve.
At first the only way I could fix it was to reinstall the OS, but
after a while it would dump core again. It turns out that cron didn't
like my password file. I had a line at the end to dis-allow login
from users of a certain netgroup something like:

When I changed this back to:

cron was happy again. I don't know the exact cause, and the line in
the password file was only temporary so it was not a problem. Hope
this helps

The experience of Jim does help!! After removing a line of
from the /etc/passwd file, the cron daemon can be started again.
This may be a bug of SunOS 4.1.3. If anyone know there is a patch
for it, please e-mail to me.

Lots of thanks to Jim and Chris.

Mr C.M. Fung				| Internet:
Electronic Engineering Department	| BITNET:
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