38 lines
1,007 B
Bash
38 lines
1,007 B
Bash
# Silent Read : emulate `read -s` of bash/zsh
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read_s() {
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stty --file=/dev/tty -echo echonl 2>/dev/null || \
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stty -F /dev/tty -echo echonl 2>/dev/null || \
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stty -f /dev/tty -echo echonl || exit 1
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IFS= read -r input </dev/tty || exit 1
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stty --file=/dev/tty echo -echonl 2>/dev/null || \
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stty -F /dev/tty echo -echonl 2>/dev/null || \
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stty -f /dev/tty echo -echonl || exit 1
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}
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# getopt(s)
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while [ $# -ge 1 ]; do
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case "$1" in
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"--noechoback") noechoback=1;;
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"--keyin") keyin=1;;
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"--display") shift; display=$1;;
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esac
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shift
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done
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if [ -n "$display" ]; then
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printf '%s' "$display" >/dev/tty
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fi
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if [ "$noechoback" = "1" ]; then
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# Try `-s` option. *ksh have it that not `--silent`. Therefore, don't try it.
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if [ -n "$BASH_VERSION" ] || [ -n "$ZSH_VERSION" ]; then
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IFS= read -rs input </dev/tty 2>/dev/null && printf '\n' >/dev/tty || read_s
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else
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read_s
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fi
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else
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IFS= read -r input </dev/tty || exit 1
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fi
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printf '%s' "'$input'"
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exit 0
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