I successfully broken it by running my CGI script a number of
times.......owhttpd server is working as I can see the devices and data through
the web page. If I try and cd /tmp/1wire the command just hangs and I cannot
get any response...have to close my ssh session and re-open it.
# ps
PID Uid VmSize Stat Command
1 root 348 S /bin/init
2 root SW [keventd]
3 root SWN [ksoftirqd_CPU0]
4 root SW [kswapd]
5 root SW [bdflush]
6 root SW [kupdated]
7 root SW [mtdblockd]
8 root SW [khubd]
9 root SWN [jffs2_gcd_mtd4]
12 root SW [usb-storage-0]
14 root SW [scsi_eh_0]
18 root SW [sd-mc-thread]
27 root SW [kjournald]
50 root DW [ixp425_csr]
51 root SW [ixp425 ixp0]
54 root 456 S /bin/sh
55 root 500 S /sbin/syslogd -n
56 root 448 S /sbin/klogd -n
147 root SW [kjournald]
294 root 880 S /usr/sbin/thttpd -C /etc/thttpd.conf
318 root 840 S /usr/sbin/smbd -D
320 root 544 S /usr/sbin/smbd -D
321 root 884 S /usr/sbin/nmbd -D
328 root 412 S /bin/inetd
346 root 436 S /usr/sbin/QuickSet
350 root 480 S /usr/sbin/USB_Detect
354 root 392 S /usr/sbin/USB_Detect
373 root 528 S /usr/sbin/crond
381 root 332 S /usr/sbin/CheckResetButton
383 root 356 S /usr/sbin/CheckPowerButton
385 root 332 S /usr/sbin/do_umount
433 root 732 S /opt/sbin/sshd
442 root 868 S owserver -P /opt/var/run/owserver.pid -u -p 3002
464 root 868 S owserver -P /opt/var/run/owserver.pid -u -p 3002
465 root 868 S owserver -P /opt/var/run/owserver.pid -u -p 3002
469 root 1464 S owfs -P /opt/var/run/owfs.pid -s 3002 /tmp/1wire
470 root 1464 S owfs -P /opt/var/run/owfs.pid -s 3002 /tmp/1wire
473 root 1464 S owfs -P /opt/var/run/owfs.pid -s 3002 /tmp/1wire
479 root 480 S owftpd -P /opt/var/run/owftpd.pid -s 3002 -p 0.0.0.0:
482 root 480 S owftpd -P /opt/var/run/owftpd.pid -s 3002 -p 0.0.0.0:
483 root 480 S owftpd -P /opt/var/run/owftpd.pid -s 3002 -p 0.0.0.0:
484 root 480 S owftpd -P /opt/var/run/owftpd.pid -s 3002 -p 0.0.0.0:
490 root 772 S owhttpd -P /opt/var/run/owhttpd.pid -s 3002 -p 3001
493 root 772 S owhttpd -P /opt/var/run/owhttpd.pid -s 3002 -p 3001
494 root 772 S owhttpd -P /opt/var/run/owhttpd.pid -s 3002 -p 3001
496 website 716 S /usr/sbin/thttpd -C /etc/thttpd-website.conf
520 root 868 S owserver -P /opt/var/run/owserver.pid -u -p 3002
15011 root 1464 S owfs -P /opt/var/run/owfs.pid -s 3002 /tmp/1wire
8867 root 1464 S owfs -P /opt/var/run/owfs.pid -s 3002 /tmp/1wire
8868 root 1464 S owfs -P /opt/var/run/owfs.pid -s 3002 /tmp/1wire
8869 root 1464 S owfs -P /opt/var/run/owfs.pid -s 3002 /tmp/1wire
8870 root 1464 S owfs -P /opt/var/run/owfs.pid -s 3002 /tmp/1wire
8871 root 1464 S owfs -P /opt/var/run/owfs.pid -s 3002 /tmp/1wire
8872 root 1464 S owfs -P /opt/var/run/owfs.pid -s 3002 /tmp/1wire
8873 root 1464 S owfs -P /opt/var/run/owfs.pid -s 3002 /tmp/1wire
23652 root 992 S /bin/bash /public/aquaread
23664 root 992 S /bin/bash /public/aquaread
23671 root 992 S /bin/bash /public/aquaread
23674 root 992 S /bin/bash /public/aquaread
23676 root 972 S /usr/sbin/thttpd -C /etc/thttpd.conf
23678 root 632 S N /opt/bin/awk {printf "%4.2f\n",((($0-1)/1.6)+5.5)} /t
23682 root 992 S /bin/bash /public/aquaread
23684 root 972 S /usr/sbin/thttpd -C /etc/thttpd.conf
23686 root 632 S N /opt/bin/awk {printf "%4.2f\n",((($0-1)/1.6)+5.5)} /t
23692 root 992 S /bin/bash /public/aquaread
23707 root 992 S /bin/bash /public/aquaread
23711 root 868 S owserver -P /opt/var/run/owserver.pid -u -p 3002
23804 root 1000 S /bin/bash /public/aquaread
23810 root 992 S /bin/bash /public/aquaread
23835 root 992 S /bin/bash /public/aquaread
23901 root 992 S /bin/bash /public/aquaread
23903 root 456 S ls
23910 root 992 S /bin/bash /public/aquaread
23998 root 992 S /bin/bash /public/aquaread
24001 root 992 S /bin/bash /public/aquaread
24004 root 992 S /bin/bash /public/aquaread
24005 root 1812 S sshd: [EMAIL PROTECTED]
24007 root 604 S -sh
24012 root 992 S /bin/bash /public/aquaread
24015 root 992 S /bin/bash /public/aquaread
24016 root 600 R ps
----- Original Message -----
From: Rob Conway
To: [email protected]
Sent: Monday, March 12, 2007 10:42 PM
Subject: Re: [Owfs-developers] Reading 1 wire data every minute with
anNSLU2(SLUG)
Paul,
After thinking about this more....I believe it is more likely to screw up if
(at the same time) my script is running and another script / command is trying
to access 1wire data.
Observations
a/ I have noticed missing data in my trend files if I have logged into the
slug and have been reading data via the command prompt. ie When I check
calibrations of my devices I generally do a few manual "cat" commands. The
next day or so I see my trend files are missing some data around the same time
as I did my calibrations. The missing data is NOT the same device as I am
calibrating. My cat command could of been requested at the same time my script
is running.
b/ The last time it stopped, i was away on business and I think it could of
been the time I logged in via my web page and executed a cgi script. My web
front end shows trends however I also have a CGI file that just does a read of
the 1wire uncached data and reports "instantaneous data". (I ahve included cgi
file below)
So I am thinking that when the 1wire file systems get hit with two read
requests it is more likely to stop responding.
See the following CGI script output
http://img.photobucket.com/albums/v319/rjconway/web1.jpg
CGI FILE #####################################################################
#!/bin/bash
etime=$(/bin/date)
### Read 1wire data and convert into engineering units #ph was 2.6667##
PH=$(/opt/bin/awk '{printf "%4.2f\n",((($0-1)/1.6)+5.5)}'
/tmp/1wire/20.B71F05000000/volt.A)
US=$(/opt/bin/awk '{printf "%5.1f\n",($0*100)}'
/tmp/1wire/20.B71F05000000/volt.B)
TempAqua=$(/opt/bin/awk '{printf "%3.1f\n",((($0-1)*5)+20)}'
/tmp/1wire/20.B71F05000000/volt.C)
LITRES=$(/opt/bin/awk '{printf "%3.1f\n",(($0-2.900)*60)}'
/tmp/1wire/20.952A05000000/volt.D)
TempOut=$(/opt/bin/awk '{printf "%3.1f\n",($0)}'
/tmp/1wire/28.11BF97000000/temperature)
TempAmb=$(/opt/bin/awk '{printf "%3.1f\n",($0)}'
/tmp/1wire/28.D70598000000/temperature)
TempRes=$(/opt/bin/awk '{printf "%3.1f\n",($0)}'
/tmp/1wire/28.A6EE97000000/temperature)
set -f
echo Content-type: text/plain
echo
echo " DEMAND REPORT"
echo -------------------------------------------
echo Report Date $etime
echo
echo
echo Aquaium Data
echo " pH =" $PH
echo " Conductivity =" $US uS
echo " Aquarium = "$TempAqua " DegC"
echo " Reservoir Temperature = "$TempRes DegC
echo " Litres Available = "$LITRES L
echo
echo Weather Data
echo " Outside Temperature =" $TempOut DegC
echo " House Temperature =" $TempAmb DegC
echo
echo --------------------------------------------
echo " Page 1/1"
###############################################################
----- Original Message -----
From: Paul Alfille
To: [email protected]
Sent: Monday, March 12, 2007 10:06 PM
Subject: Re: [Owfs-developers] Reading 1 wire data every minute with
anNSLU2 (SLUG)
I use an "inittab" script -- it gets automatically restarted. (And a delay
loop).
Are you running your script against owserver using owshell? Can you tell
what the point of failure is? Is owserver still working after the "crash" --
can you access from another machine. It would be nice to find the underlying
problem.
Paul Alfille
On 3/12/07, Rob Conway <[EMAIL PROTECTED]> wrote:
I am using an NSLU2 (Unslung 6.8), I currently use a simple bash script
to gather 8 off 1wire variables and do some calc's before storing the data in
trend files. I have it scheduled in crontab to run every 1 minute. What
happens is that about ~3 times a month the NSLU2 grinds to a halt. It seems
that my script somehow screws up and I just fill up the slug with scripts never
finishing. I think its because it cannot access the 1wire file system to read
the data...
Is this the best way to handle scheduling of scripts, using a 1 minute
crontab entry ?
I was thinking to just use a loop in a single script and just sleep for
60 seconds...that way if it does screw up at least the NSLU2 will continue to
run. I could have another script testing a "PID entry" to make sure its still
running and if not just restart it automatically.
I know its slightly off topic however was keen to see if other NSLU2
-1wire users have implemented the same type of continuous monitoring and what
their maximum uptime was. The SLUG is lightly loaded and dedicated for data
monitoring with owfs, NTP, thhtpd, and rrdtool....I want to move onto relay
output control thus trying to sort this problem out for reliability before I
move into closed loop control.
owfs version as seen from #ipkg list_installed
owfs - 2.6p1-3 - 1-Wire filesystem (http://owfs.sf.net)
owlib - 2.6p1-3 - 1-wire library
fuse-utils - 2.6.0-pre2-3 - Fuse
################################################################
#!/bin/bash
### Force Simultaneous 1wire conversion ###
echo 1 >/tmp/1wire/simultaneous/voltage
echo 1 >/tmp/1wire/simultaneous/temperature
### Read 1wire data and convert into engineering units ##
PH=$(/opt/bin/awk '{printf "%4.2f\n",((($0-1)/1.6)+5.5)}'
/tmp/1wire/20.B71F05000000/volt.A)
US=$(/opt/bin/awk '{printf "%5.1f\n",($0*100)}'
/tmp/1wire/20.B71F05000000/volt.B)
TempAqua=$(/opt/bin/awk '{printf "%3.1f\n",((($0-1)*5)+20)}'
/tmp/1wire/20.B71F05000000/volt.C)
LITRES=$(/opt/bin/awk '{printf "%3.1f\n",(($0-2.900)*60)}'
/tmp/1wire/20.952A05000000/volt.D)
TempOut=$(/opt/bin/awk '{printf "%3.1f\n",($0)}'
/tmp/1wire/28.11BF97000000/temperature)
TempAmb=$(/opt/bin/awk '{printf "%3.1f\n",($0)}'
/tmp/1wire/28.D70598000000/temperature)
TempRes=$(/opt/bin/awk '{printf "%3.1f\n",($0)}'
/tmp/1wire/28.A6EE97000000/temperature)
Accum_flow=$(/opt/bin/awk '{printf "%d\n",($0/4100)}'
/tmp/1wire/uncached/1D.EBEF0900000034/counters.A)
### Calculations based upon Data ###
C12=$(/opt/bin/awk -v PH="$PH" '{printf "%3.1f\n",((3*$0)*(10^(7-PH)))}'
/public/kh_value)
Todayflow=$(/opt/bin/awk -v AF="$Accum_flow" '{printf "%d\n",(AF-$0)}'
/public/lastflow.txt)
Weekflow=$(/opt/bin/awk -v AF="$Accum_flow" '{printf "%d\n",(AF-$0)}'
/public/weekflow.txt)
#################################################################
cheers rob -Australia
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