Shell Programming and Scripting

The while loop exits (early) when a simple ssh command is run.
#!/bin/ksh
#set -x
#-------------------------------------------------------------------------
# Functions Section
#-------------------------------------------------------------------------
while :
do
cat list.txt|while read TypeB; do
if [ $TypeB = 1 ]; then
echo "#1"
fi
if [ $TypeB = 2 ]; then
echo "#2"
ssh ftadmin@XXX.81.204.54 "date"
fi
if [ $TypeB = 3 ]; then
echo "#3"
fi
done
sleep 5
done
exit

cat list.txt
1
2
3

Results when the ssh statement is commented out is:
#1
#2
#3
but when I do the ssh statement:
#1
#2

Then it sleeps. Can anyone explain this and tell me how I get around it.

The "cat list.txt" is providing stdin for the entire "while" loop. It is not constrained to only the read statement. ssh is eating all of the input and feeding it to "date" as stdin. And date just ignores the input. Use the -n option to ssh to stop this from happening.