Location: Saint Paul, MN USA / BSD, CentOS, Debian, OS X, Solaris
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Hi.
Please learn to use CODE tags to make your scripts and data readable.
The problem is scope -- in some versions of shells, the pipe-into-while-loop is run in a separate process, so that variables are out of scope -- they no longer exist, and variables are not passed up from children to parents.
Some versions of Linux will have a recent version of ksh and allow your script to run as you wish (code omitted, paths and names made local):
Code:
$ ./s2
Environment: LC_ALL = C, LANG = C
(Versions displayed with local utility "version")
OS, ker|rel, machine: Linux, 2.6.26-1-686, i686
Distribution : Debian GNU/Linux 5.0
ksh 93s+
OUTBSTAT[0]=1000
OUTBSTAT[1]=1001
OUTBSTAT[2]=1002
OUTBSTAT[0]=1000
OUTBSTAT[1]=1001
OUTBSTAT[2]=1002
However, a portable method would be to re-direct into the while loop, useful for pdksh, for example, on this different version of Linux:
Code:
#!/bin/ksh
echo
set +o nounset
LC_ALL=C ; LANG=C ; export LC_ALL LANG
echo "Environment: LC_ALL = $LC_ALL, LANG = $LANG"
echo "(Versions displayed with local utility \"version\")"
version >/dev/null 2>&1 && version "=o" $(_eat $0 $1)
set -o nounset
echo
K=0
SCRIPT_DIR=/local/home/temp/Gen
SCRIPT_DIR=.
# cat $SCRIPT_DIR/test/list.txt | while read WRDLST
# cat $SCRIPT_DIR/list.txt | while read WRDLST
cp $SCRIPT_DIR/list.txt t1
while read WRDLST
do
# set -A STAT `cat $SCRIPT_DIR/test/shst.txt | grep $WRDLST | awk '{print $2}'`
set -A STAT `cat $SCRIPT_DIR/shst.txt | grep $WRDLST | awk '{print $2}'`
OUTBSTAT[$K]=${STAT[0]}
echo "OUTBSTAT[$K]=${OUTBSTAT[$K]}"
K=`expr $K + 1 `
done <t1
K=0
while [ $K -ne 3 ]
do
echo " OUTBSTAT[$K]=${OUTBSTAT[$K]}"
K=`expr $K + 1`
done
exit 0
Producing:
Code:
% ./s1
Environment: LC_ALL = C, LANG = C
(Versions displayed with local utility "version")
OS, ker|rel, machine: Linux, 2.6.11-x1, i686
Distribution : Xandros Desktop 3.0.3 Business
PD KSH v5.2.14 99/07/13.2
OUTBSTAT[0]=1000
OUTBSTAT[1]=1001
OUTBSTAT[2]=1002
OUTBSTAT[0]=1000
OUTBSTAT[1]=1001
OUTBSTAT[2]=1002
This is a common problem among shells. Moral: don't pipe into while loops ... cheers, drl
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