On 25.03.10 06:56, Michael Abbott wrote:
On Wed, 24 Mar 2010, Cathey, Jim wrote:
A shell script?
while :; do
read LINE
echo `date`: $LINE
done<ttydev>logfile
Better:
while read -r; do
echo "$(date): $REPLY"
done<ttydev>logfile
If you use `read -r` you get the raw line, it's sensible to exit the loop
on end of input, and I don't understand why anybody still uses backticks
for command line sub-shells!
Hi
Thanks a lot. It works a treat. Here is my current script:
while read -r; do
echo "[$(date)]: $REPLY"
done </dev/ttyUSB0 >>/usb/BigDrive/CurrentCost/CurrentCost.log
I used >> for the output to append the file rather then replace. This
script is supposed to be always on,
I will start it automatically (probably in rc.syinit).
I have one more problem at the moment the data sets are separated by
0x0D 0x0A (carriage return and new line).
This means I get:
[Thu Mar 25 16:41:56 NZST 2010]: <msg><src>CC1 ... 000</watts></ch1></msg>
[Thu Mar 25 16:41:56 NZST 2010]:
[Thu Mar 25 16:41:59 NZST 2010]: <msg><src>CC1 ... </watts></ch3></msg>
[Thu Mar 25 16:41:59 NZST 2010]:
The second empty looking line contains the 0x0A.
Is there an easy way to disregard lines that contain only control
characters or filter the text?
Regards
Mike
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