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|
#!/bin/sh
set -eu
die()
{
echo "$@" 1>&2
exit 1
}
recv_hole()
{
local n
read n
truncate --size "+$n" "$1"
}
recv_data()
{
local n
read n
dd of="$1" conv=notrunc oflag=append bs=1 count="$n" status=noxfer 2>&1 |
grep -Ev ' records (in|out)$' || true
}
output="$1"
touch "$output"
while read what
do
case "$what" in
DATA) recv_data "$output" ;;
HOLE) recv_hole "$output" ;;
*) die "Unknown instruction: $what" ;;
esac
done
|
