Shell Programming and Scripting

Hello,

For my weather station I have made a little perl script to put the data into cacti. The next problem I have.
I can only get positive numbers or negative numbers.

What do I do:
Though a shell scrip I call the perl script.
Shell script:

Code:

#!/bin/sh
cat data.txt | stats.pl

Perl script:

Code:

while(<STDIN>) {
chomp;
if (s/^buiten_t[ ]*[:][ ]*(\D+\.*\d+\.*\d+).*/\1/) {
print "buiten_t:$_ ";
}

Whith this input I can only get the negative numbers.
Like Buiten_t:-6.5
When I do:

Code:

if (s/^buiten_t[ ]*[:][ ]*(\d+\.*\d+).*/\1/) {

I get only the positive numbers.
Buiten_t:28.6

If I let the

Code:

if (s/^buiten_t[ ]*[:][ ]*(\D+\.*\d+\.*\d+).*/\1/) {

for the positive numnbers there is a space in the output.
The ouput is then Buiten_t: 28.6

How do I make the script the it can workt with both settings?
Output like Buiten_t:-6.5 or Buiten_t:28.6

thnx

if you want to print signed numbers use printf instead of print.

Hello,

Tnxs for the quick relpy,
I have changed it to printf but I stil get a space betwin the : and the number when the number is positive.
if (s/^buiten_t[ ]*[:][ ]*(\D+\.*\d+\.*\d+).*/\1/) {

rbl
PS
The data in the file looks like:
--------Buiten sensor-------------------
buiten_t : -4.0 ▒C
buiten_h : 89 %
--------Ground sensor-------------------
grond_t : -2.8 ▒C
grond_h : 89 %
-

how about you try

[-+]* instead of \D+
assuming you always will have positive or negative numbers only. If you are sure that + is not used anywhere (which is the ideal case) just use [-]*

HTH,
PL

Hi Daptal,

I change it to the settings and it works great tnxs,
rbl