boromir
asked on
Pipes and variable scoping inside korn shell scripts
It seems that per ksh '93 spec (and maybe earlier) doing something like
---
cat filename |while read $col1 $col2; do
array($i)=$col1
echo ${#array[@]}
done
echo ${#array[@]}
---
causes, for a 5 line file, output of
1
2
3
4
5
0
seemingly because in that ksh spec the pipes run as separate processes. However, I really need to keep the contents of the array outside the loop. What can I do? Am I even misinterpreting the spec? As a related question, how do I find out which version of ksh I'm running? FYI, I have a Linux RedHat 6.0 install.
---
cat filename |while read $col1 $col2; do
array($i)=$col1
echo ${#array[@]}
done
echo ${#array[@]}
---
causes, for a 5 line file, output of
1
2
3
4
5
0
seemingly because in that ksh spec the pipes run as separate processes. However, I really need to keep the contents of the array outside the loop. What can I do? Am I even misinterpreting the spec? As a related question, how do I find out which version of ksh I'm running? FYI, I have a Linux RedHat 6.0 install.
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