bing@galbp.LBP.HARRIS.COM (Bing Bang) (02/16/88)
i just noticed somebody posted a cron clone and just wanted to warn people that if you put this cron in your /etc/rc, this may screw up the tty signal handling for those of you who are using multiple screen tty drivers. -- Bing H. Bang +--------------------------------------------------------+ Harris/Lanier |OS/2 on PS/2: Half an operating system on half a machine| Atlanta GA +--------------------------------------------------------+
boh@culdev1.UUCP (Brian O'Halloran) (03/25/88)
Could some one please give me a hand. I'm trying to get the recently posted version of cron up on MINIX 1.2, but I'm having some problems as I have noted below. Any help would be greatly appreciated and I will post summary on comp.os.minix. o The line in rc "/etc/update &" does not work when "/etc/cron &" is anywhere in rc. o If I have "/etc/cron &" alone in rc by removing "/etc/update &" cron works fine. Likewise if I have "/etc/update &" alone in rc update works fine. o After rc is executed the process counter (F1) for "/etc/cron &" increments at a rate consistent with what one would expect until the first process counter for "/etc/update &" increments. At that point they both freeze forever. It seems as if when update returns from sleep(30) that both tasks freeze. o If I "/etc/cron &" after I logon to /usr/ast from /bin/sh cron works fine. o I have changed sleep() in cron.c to pass various times from 1 to 60 with the same results as above. Here is my rc; /bin/clr /etc/mount /dev/hd1 /minix /etc/mount /dev/hd2 /bin /etc/clock > /tmp/temp.file /bin/date -q < /tmp/temp.file > /dev/null /bin/rm /tmp/temp.file /etc/cron & /etc/update & I have a clock routine which reads the AT clock. If I replace this with the line /bin/date -q < /dev/tty I still get the same results as above. If I flip the two lines from /etc/cron & /etc/update & to /etc/update & /etc/cron & I get the same results as above. It appears as if I am causing a deadlock for the clock resources which both update and cron use. Do you have any ideas? Yesterday I installed ast's fix for deadlock and I still have the problem. I am using an IBM PC/AT (6MHz), 640K RAM, 1408K extended, 30MByte hard disk, EGA, MINIX 1.2 with fix for boot from hard disk and load root into extended memory. Thanks, Brian P. O'Halloran boh@culdev1.uucp
bevan@ecr.mu.oz.au (Bevan Johnson ANDERSON) (02/20/91)
Hello all. I have a strange problem. Sometimes when I am using elvis, and I am happily edditing away, suddenly I get an 'Alarm clock' message, then a prompt. After this the machine locks up and I have to reboot. I don't have a cron job running( I think... ie I don't explicitly aski for one), but I seem to recall others with this problem. Thanks in advance, Bevan.
waltje@uwalt.nl.mugnet.org (Fred 'The Rebel' van Kempen) (03/03/91)
Gentlemen (any ladies out there?) , The cron program I posted some time ago still crashed on some (especially slow or very busy) systems. Since it did not have anything to do with memory availability, it had to be somewhere in the signalling part of cron. So, we at NLMUG hacked up the cron program to use a different approach. The result is a cron that can only be killed by stabbing it in the back (i.e. kill -9 pid). It is as steady as a rock on all systems at MUGNET-NL. I therefore hope that I my subject line is justified. Please find out for yourselves, and please report any problems to me if you encounter any... 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HATICE%TRMETU.BITNET@cunyvm.cuny.edu (Hatice Kuey) (03/06/91)
I am lady and I think there are a lot of ladies in the world which u can not see? where are you living ?