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untar files atomically

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Kovid Goyal 2022-02-27 18:29:22 +05:30
parent e06bd68379
commit ae48407b20
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GPG Key ID: 06BC317B515ACE7C
1 changed files with 12 additions and 4 deletions
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16
shell-integration/ssh/bootstrap.sh
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@ -39,7 +39,17 @@ size=""
record_separator=$(printf "\036")
untar() {
command base64 -d | command tar xjf - --no-same-owner -C "$HOME"
# extract the tar file atomically, in the sense that any file from the
# tarfile is only put into place after it has been fully written to disk
tdir=$(mktemp -d "$HOME/.kitty-ssh-kitten-untar-XXXXXXXXXXXX")
[ $? = 0 ] || die "Creating temp directory failed"
command base64 -d | command tar xjf - --no-same-owner -C "$tdir"
cwd="$PWD";
cd "$tdir";
find . -type d -exec mkdir -p "${HOME}/{}" ";"
find . -type f -exec mv "{}" "${HOME}/{}" ";"
cd "$cwd";
rm -rf "$tdir";
}
read_record() {
@ -73,7 +83,6 @@ get_data() {
data_dir="$HOME/$(read_record)"
# using dd with bs=1 is very slow on Linux, so use head
command head -c "$size" < /dev/tty | untar
rc="$?";
}
get_data
@ -85,11 +94,10 @@ if [ -n "$leading_data" ]; then
# have been sent before the script had a chance to run
printf "\r\033[K"
fi
if [ "$rc" != "0" ]; then die "Failed to extract data transmitted by ssh kitten over the TTY device"; fi
[ -f "$HOME/.terminfo/kitty.terminfo" ] || die "Incomplete extraction of ssh data, no kitty.terminfo found";
shell_integration_dir="$data_dir/shell-integration"
settings_dir="$data_dir/settings"
env_var_file="$settings_dir/env-vars.sh"
[ -f "$HOME/.terminfo/kitty.terminfo" -a -f "$env_var_file" ] || die "Incomplete extraction of ssh data";
# export TERMINFO
tname=".terminfo"