48 lines
1.1 KiB
Bash
Executable File
48 lines
1.1 KiB
Bash
Executable File
#!/usr/bin/env bash
|
|
|
|
set -euo pipefail
|
|
|
|
# Ensure in a interactive terminal
|
|
[ ! -t 0 ] && exit 1
|
|
|
|
# Construct query
|
|
QUERY_CODE=$(printf "\033]1337;ReportCellSize\a")
|
|
EXPECTED_RESPONSE=$(printf "\033]1337;") # followed by "ReportCellSize=...", but only the prefix is enough
|
|
# Construct fence code that most terminals will respond to
|
|
# to ensure that at least something will be sent back and
|
|
# to detect the end of the response
|
|
FENCE_CODE=$(printf "\033[c")
|
|
|
|
# Set terminal to raw mode
|
|
stty_orig=$(stty -g)
|
|
trap 'stty "$stty_orig"' EXIT INT TERM HUP
|
|
stty -echo -icanon min 1 time 0
|
|
|
|
printf "%s%s" "$QUERY_CODE" "$FENCE_CODE" > /dev/tty
|
|
|
|
response=""
|
|
ret=1
|
|
while true; do
|
|
IFS= read -r -N 1 -t 0.3 char || {
|
|
[ -z "$char" ] && break
|
|
}
|
|
|
|
response+="$char"
|
|
|
|
if [[ "$response" == *"$EXPECTED_RESPONSE"* ]]; then
|
|
ret=0
|
|
# Keep reading until response is complete to
|
|
# avoid leaving unread data in the terminal
|
|
fi
|
|
|
|
if [[ "$response" == *$'\033['*'c' ]]; then
|
|
break
|
|
fi
|
|
|
|
if [ ${#response} -gt 1024 ]; then
|
|
break
|
|
fi
|
|
done
|
|
|
|
exit $ret
|