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ksh: variable is gone when function is piped to tee

ksh: variable is gone when function is piped to tee

(OP)

Hello,
could anyone please explain why variable DIR1 disappears in script2 (when functions f1/f2 are "piped" to tee command)?

CODE --> tee

# cat ddd
#!/usr/bin/ksh

f1 () {
DIR1=/mnt/swt
echo inside f1 DIR1 is ${DIR1}
}

f2 () {
echo inside f2 DIR1 is ${DIR1}
}

f1
echo outside f1 DIR1 is $DIR1
f2

# ./ddd
inside f1 DIR1 is /mnt/swt
outside f1 DIR1 is /mnt/swt
inside f2 DIR1 is /mnt/swt
# 



CODE --> tee

# cat ddd
#!/usr/bin/ksh

f1 () {
DIR1=/mnt/swt
echo inside f1 DIR1 is ${DIR1}
}

f2 () {
echo inside f2 DIR1 is ${DIR1}
}

f1 | tee -a /tmp/log1
echo outside f1 DIR1 is $DIR1
f2 | tee -a /tmp/log1

# ./ddd
inside f1 DIR1 is /mnt/swt
outside f1 DIR1 is
inside f2 DIR1 is
# 


RE: ksh: variable is gone when function is piped to tee

(OP)
thank you!

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