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korn shell: check the content of a string of a variable

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# 1  
Old 04-23-2012
korn shell: check the content of a string of a variable
hello,

i have a variable which should have following content :

var="value1"
or
var="value2"
or
var="value2:[digit][digit]*" # example: value2:22

how can i check :
- if the content is ok (value1 / value2* )
- the two options of "value2"

when content is example "value2:22" , i want to split it in "part1" and "part2" , like "value2", "22". for spliting i will use "awk"

is is possible to do this with "case" (with ERE) ?

Code:
case "${var}" in
  "value1" ) ...
  value2* )  case "${var}" in
                    value2 ) ...
                    value2:* ) ...
...
esac

split :
Code:
echo ${var}" | awk -F":" '{ print $1, $2 }' | read part1 part2

regards

Moderator's Comments:
Mod Comment Please use [code] tags
Last edited by Scrutinizer; 04-23-2012 at 06:18 PM..
# 2  
Old 04-23-2012
Try this:

Code:
case "$var" in
    value1) echo value1 ;;
    value2) echo value2 ;;
    *:[0-9][0-9]*) echo part1=${var%:*} part2=${var#*:} ;;
    *) echo "Unknown format" >&2 ;;
esac

This User Gave Thanks to Chubler_XL For This Post:
bora99
# 3  
Old 04-23-2012
Might need to flip value2 and value2:[0-9][0-9] around

Code:
case $var in
    value1)             echo value1 ;;
    value2:[0-9][0-9]*) echo "part1=${var%%:*} part2=${var#*:}" ;;
    value2)             echo value2 ;;
    *)                  echo "Unknown format" >&2 ;;
esac

This User Gave Thanks to Scrutinizer For This Post:
bora99
# 4  
Old 04-24-2012
O by the way, the matching syntax use in a case statement is Unix Pattern matching, not ERE .
This User Gave Thanks to Scrutinizer For This Post:
bora99
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