96 lines
2.5 KiB
Bash
96 lines
2.5 KiB
Bash
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# getopt(s)
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while [ $# -ge 1 ]; do
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arg="$(printf '%s' "$1" | grep -E '^-+[^-]+$' | tr '[A-Z]' '[a-z]' | tr -d '-')"
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case "$arg" in
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'display') shift; options_display="$1";;
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'keyin') options_keyIn='true';;
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'noechoback') options_noEchoBack='true';;
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'mask') shift; options_mask="$1";;
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'exclude') shift; options_exclude="$1";;
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'cs') options_cs='true';;
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'encoded') options_encoded='true';;
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esac
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shift
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done
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reset_tty() {
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if [ -n "$save_tty" ]; then stty "$save_tty"; fi
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}
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trap 'reset_tty' EXIT
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save_tty="$(stty -g)"
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write_tty() { # 2nd arg: enable escape sequence
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if [ -n "$2" ]; then
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printf '%b' "$1" >/dev/tty
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else
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printf '%s' "$1" >/dev/tty
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fi
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is_inputline='true'
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}
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replace_allchars() { (
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text=''
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for i in $(seq 1 ${#1})
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do
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text="$text$2"
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done
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printf '%s' "$text"
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) }
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[ -z "$options_noEchoBack" ] && [ -z "$options_keyIn" ] && is_cooked='true'
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if [ -n "$options_display" ]; then
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write_tty "$options_display"
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options_display=''
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fi
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if [ -n "$is_cooked" ]; then
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stty --file=/dev/tty cooked 2>/dev/null || \
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stty -F /dev/tty cooked 2>/dev/null || \
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stty -f /dev/tty cooked || exit $?
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else
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stty --file=/dev/tty raw -echo 2>/dev/null || \
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stty -F /dev/tty raw -echo 2>/dev/null || \
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stty -f /dev/tty raw -echo || exit $?
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fi
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[ -n "$options_keyIn" ] && req_size=1
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while :
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do
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if [ -z "$is_cooked" ]; then
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chunk="$(dd if=/dev/tty bs=1 count=1 2>/dev/null)"
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chunk="$(printf '%s' "$chunk" | tr -d '\r\n')"
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[ -z "$chunk" ] && is_eol='true' # NL or empty-text was input
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else
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IFS= read -r chunk </dev/tty || exit $?
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chunk="$(printf '%s' "$chunk" | tr -d '\r\n')"
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is_eol='true'
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fi
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# other ctrl-chars
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# chunk="$(printf '%s' "$chunk" | tr -d '\00-\10\13\14\16-\37\177')"
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# for System V
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chunk="$(printf '%s' "$chunk" | tr -d '\00\01\02\03\04\05\06\07\10\13\14\16\17\20\21\22\23\24\25\26\27\30\31\32\33\34\35\36\37\177')"
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if [ -n "$chunk" ] && [ -z "$is_cooked" ]; then
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if [ -z "$options_noEchoBack" ]; then
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write_tty "$chunk"
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elif [ -n "$options_mask" ]; then
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write_tty "$(replace_allchars "$chunk" "$options_mask")"
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fi
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fi
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input="$input$chunk"
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if [ -n "$is_eol" ] || \
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( [ -n "$options_keyIn" ] && [ ${#input} -ge $req_size ] ); then break; fi
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done
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if [ -z "$is_cooked" ] && ! ( [ -n "$options_keyIn" ] && [ -z "$is_inputline" ] ); then
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write_tty '\r\n' 'true'
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fi
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printf "'%s'" "$input"
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exit 0
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