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I started programming with C and was searching for defined functions in header files (*.h) on this system here.
I also now got another help related using parameter '-exec grep -i word' with 'find'...

if you still try to send mail here is another explanation sounds better because of configuration provider and so on:
email - How to send mail from the command line? - Ask Ubuntu - Stack Exchange...

echo $1 > tmp.out
xname1=$(awk '{up=toupper($1); printf up "\n"}' tmp.out)
not tested inside of a script..

timezone difference?

pa=getline mypwd; printf paoutput: 1

EDIT:

found the static array 'ENVIRON' in manual.

works:pa=ENVIRON["PWD"]; printf pa