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|
#!/bin/sh
set -eu
usage() {
cat <<-'EOF'
Usage:
uc
uc -h
EOF
}
help() {
cat <<-'EOF'
Options:
-h, --help show this message
Transforms text from STDIN from upper-case to lower-case. It is
the equivalent of running 'tr [:lower:] [:upper:]'.
Examples:
Normalize to lower-case:
$ echo EuAndreh | uc
EUANDREH
Keep the text as-is:
$ echo ANDREH | uc
ANDREH
EOF
}
for flag in "$@"; do
case "$flag" in
(--)
break
;;
(--help)
usage
help
exit
;;
(*)
;;
esac
done
while getopts 'h' flag; do
case "$flag" in
(h)
usage
help
exit
;;
(*)
usage >&2
exit 2
;;
esac
done
shift $((OPTIND - 1))
tr '[:lower:]' '[:upper:]'
|
