Post by thread:[OT]: Help with Linux and UPS

Just bought myself a UPS with Linux support. I installed the package (called cupsd, which is the identical name of the printing daemon in Linux...) and it isn't working. :( The daemon keeps reporting "UPS connection error". There is very little documentation that I can find with regards to it. However the readme does state the following: In order to use the package, you must have an available serial port. This serial port should not be running getty or any other communications software. The permissions on the serial port should also be changed to mode 600, to prevent malicious users from killing the power. The possible choice is "/dev/ttyS0" or "/dev/ttyS1". I have it set to ttyS0. Anyone know how I go about checking (and removing) the "getty or any other communications software" on this port? I'm running Redhat 9.0. Thanks for any help. TTYL ---------------------------------- Herbert's PIC Stuff: http://repatch.dyndns.org:8383/pic_stuff/ -- http://www.piclist.com hint: To leave the PICList spam_OUTpiclist-unsubscribe-requestTakeThisOuTmitvma.mit.edu

On Tue, Apr 20, 2004 at 04:07:02PM -0400, Herbert Graf wrote: > > I installed the package (called cupsd, which is the identical name of the > printing daemon in Linux...) and it isn't working. :( > > The daemon keeps reporting "UPS connection error". > > There is very little documentation that I can find with regards to it. > However the readme does state the following: > > Anyone know how I go about checking (and removing) the "getty or any other > communications software" on this port? ps ax | grep tty You should see something like this: 1510 tty1 S 0:00 /sbin/mingetty tty1 1511 tty2 S 0:00 /sbin/mingetty tty2 1512 tty3 S 0:00 /sbin/mingetty tty3 1513 tty4 S 0:00 /sbin/mingetty tty4 1514 tty5 S 0:00 /sbin/mingetty tty5 1515 tty6 S 0:00 /sbin/mingetty tty6 2595 pts/7 S 0:00 grep tty tty1-6 are the virtual terminals. You could always connect another computer to that serial port and see what the daemon is sending over the serial port. -- Alex Harford http://www.alexharford.com .....alex-spamKILLspam@spam@alexharford.com Tel: (604) 738-5674 -- http://www.piclist.com hint: To leave the PICList piclist-unsubscribe-requestKILLspammitvma.mit.edu

I don't know RH in details, but if you didn't change any basic configuration, there should be no program running on a serial port. But you can check it with "ps -A" . This will show you the gettys on tty0 through tty6 and nothing should be on ttyS0 or ttyS1. If there is something, kill it with the number of the process shown with "ps -A" . You can get a short list with "ps -A | grep tty". If you find something running on any serial, look into files /etc/rc.local and more probably on /etc/inittab for something getting started by the "init" process. You can also rename the package, but you'll need to be *very* cautious. I mean it. You would have to rename the executables and the init scripts, including the names of the executables inside those scripts. As Linux cares for upper/lower case, you can simply change one or two letters for capitals. The scripts are located in /etc/rc.d/init.d/ or /etc/init.d/ and there should be symbolic links in /etc/rc.d/rcX.d with X from 1 to 5 or 6 that also needs to be erased and generated again for the new file names. Too weird, though. BTW, have you connected the serial cable? ;-) just kidding!!! Hope this helps Francisco Herbert Graf wrote: {Quote hidden}>Just bought myself a UPS with Linux support. > >I installed the package (called cupsd, which is the identical name of the >printing daemon in Linux...) and it isn't working. :( > >The daemon keeps reporting "UPS connection error". > >There is very little documentation that I can find with regards to it. >However the readme does state the following: > >In order to use the package, you must have an available >serial port. This serial port should not be running getty or any >other communications software. The permissions on the serial >port should also be changed to mode 600, to prevent malicious >users from killing the power. >The possible choice is "/dev/ttyS0" or "/dev/ttyS1". > >I have it set to ttyS0. > >Anyone know how I go about checking (and removing) the "getty or any other >communications software" on this port? > >I'm running Redhat 9.0. > >Thanks for any help. TTYL > >---------------------------------- >Herbert's PIC Stuff: >http://repatch.dyndns.org:8383/pic_stuff/ > >-- >http://www.piclist.com hint: To leave the PICList >.....piclist-unsubscribe-requestKILLspam.....mitvma.mit.edu > >. > > > -- http://www.piclist.com hint: To leave the PICList EraseMEpiclist-unsubscribe-requestspam_OUTTakeThisOuTmitvma.mit.edu

I don't know redhat specifics but... you may have /dev/modem or /dev/mouse symbolicly linked to /dev/ttyS0 or /dev/ttyS1 Also IIRC /dev/cua0 and /dev/cua1 are special cases of /dev/ttyS0 and /dev/ttyS1 so these (cua) devices could be in use which might screw up something else trying to use S0 and S1. If I were in your position I would search the startup scripts (rc.* - probably hanging off /etc) for references to all the above named devices. you could also try looking for other symbolic links to your serial ports, try something like ls -al /dev | grep ttyS | less Regards Sergio Masci {Original Message removed}

What distribution are you using? What kernel version are you using? Bob Cochran Herbert Graf wrote: {Quote hidden}> Just bought myself a UPS with Linux support. > > I installed the package (called cupsd, which is the identical name of the > printing daemon in Linux...) and it isn't working. :( > > The daemon keeps reporting "UPS connection error". > > There is very little documentation that I can find with regards to it. > However the readme does state the following: > > In order to use the package, you must have an available > serial port. This serial port should not be running getty or any > other communications software. The permissions on the serial > port should also be changed to mode 600, to prevent malicious > users from killing the power. > The possible choice is "/dev/ttyS0" or "/dev/ttyS1". > > I have it set to ttyS0. > > Anyone know how I go about checking (and removing) the "getty or any other > communications software" on this port? > > I'm running Redhat 9.0. > > Thanks for any help. TTYL > > ---------------------------------- > Herbert's PIC Stuff: > http://repatch.dyndns.org:8383/pic_stuff/ > > -- > http://www.piclist.com hint: To leave the PICList > piclist-unsubscribe-requestspam_OUTmitvma.mit.edu > > -- Bob Cochran Greenbelt, Maryland, USA http://greenbeltcomputer.biz/ -- http://www.piclist.com hint: To leave the PICList @spam@piclist-unsubscribe-requestKILLspammitvma.mit.edu