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Use head -c only if available

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This commit is contained in:
Kovid Goyal 2022-03-07 21:48:06 +05:30
parent 5e457da30b
commit 84303cbf2e
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1 changed files with 12 additions and 6 deletions
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18
shell-integration/ssh/bootstrap.sh
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@ -94,12 +94,18 @@ else
return $?
}
read_n_bytes_from_tty() {
# using dd with bs=1 is very slow, so use head. On non GNU coreutils head
# does not limit itself to reading -c bytes only from the pipe so we can potentially lose
# some trailing data, for instance if the user starts typing. Cant be helped.
command head -c "$1" < /dev/tty
}
# using dd with bs=1 is very slow, so use head. On non GNU coreutils head
# does not limit itself to reading -c bytes only from the pipe so we can potentially lose
# some trailing data, for instance if the user starts typing. Cant be helped.
if [ "$(printf "%s" "test" | command head -c 3 2> /dev/null)" = "tes" ]; then
read_n_bytes_from_tty() {
command head -c "$1" < /dev/tty
}
else
read_n_bytes_from_tty() {
command dd bs=1 count="$1" < /dev/tty 2> /dev/null
}
fi
fi
debug() { dcs_to_kitty "print" "debug: $1"; }