Ask user to confirm

Confirm() { read -sn 1 -p "$1 [Y/N]? "; [[ $REPLY = [Yy] ]]; }
Returns true if user presses the key. Use it like Confirm "Continue" && do action

12
By: frans
2010-11-22 11:01:14

1 Alternatives + Submit Alt

What Others Think

It's usually good UI to display the response so the user can confirm that he really did press the wrong key so I would recommend leaving of the -s. If you'd like to have an echo after the prompt so the next output is not on the same line as the prompt, you can do one of these: confirm() { read -n 1 -p "$1 [Y/N]? "; [[ $REPLY = [Yy] ]] && echo || { echo; return 1;} } confirm() { read -n 1 -p "$1 [Y/N]? "; [[ $REPLY = [Yy] ]]; local r=$?; echo; return $r; }
dennisw · 412 weeks and 5 days ago
The fact is that in scripts where i used that, i used the verbosity of the involved action like: Confirm "Delete files" && rm -v $Files || echo "cancelled"
frans · 412 weeks and 4 days ago
how do i halt the script if user pressed N at Confirm() { read -sn 1 -p "$1 [Y/N]? "; [[ $REPLY = [Yy] ]]; } Confirm "Continue?"
rubo77 · 359 weeks and 3 days ago
if you mean 'exit', then it's simply: Confirm "Continue" || exit The "?" is already in the function so there's no need to pass it in the parameter.
frans · 359 weeks and 3 days ago

What do you think?

Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?

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