3
votes
2answers
167 views

Function caller positional parameters

I need to read and write the positional parameters $@ of a function's caller. The Bash man page says that: A shell function is an object that is called like a simple command and executes a ...
1
vote
1answer
209 views

What are the scope restrictions for setting shopt extglob. and other options?

My non-interactive bash shell has extglob off. I would like to turn it on in the statement immediately before a command, but I have noticed that when shopt -s extglob is within an if .. then .. else ...
11
votes
2answers
590 views

Set and Shopt - Why Two?

set and shopt are both shell builtins that control various options. I often forget which options are set by which command, and occasionally which option sets/unsets (set +o/-o, shopt -s/-u). Why are ...