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confirm.sh a simple way to add confirmation to bash scripts
# ======================================================================
#
# @link http://wuhrr.wordpress.com/2010/01/13/adding-confirmation-to-bash/#comment-3540
#
# Function: confirm
# Asks the user to confirm an action, If the user does not answer yes,
# then the script will immediately exit.
#
# Parameters:
# $@ - The confirmation message
#
# Examples:
# > # Example 1
# > # The preferred way to use confirm
# > confirm Delete file1? && echo rm file1
# >
# > # Example 2
# > # Use the $? variable to examine confirm's return value
# > confirm Delete file2?
# > if [ $? -eq 0 ]
# > then
# > echo Another file deleted
# > fi
# >
# > # Example 3
# > # Tell bash to exit right away if any command returns a non-zero code
# > set -o errexit
# > confirm Do you want to run the rest of the script?
# > echo Here is the rest of the script
#
# ======================================================================
function confirm()
{
echo -n "$@ "
read -e answer
for response in y Y yes YES Yes Sure sure SURE OK ok Ok
do
if [ "_$answer" == "_$response" ]
then
return 0
fi
done
# Any answer other than the list above is considerred a "no" answer
return 1
}
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