diff options
Diffstat (limited to '.config/login.d/02_xdg_runtime_dir.sh')
| -rw-r--r-- | .config/login.d/02_xdg_runtime_dir.sh | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/.config/login.d/02_xdg_runtime_dir.sh b/.config/login.d/02_xdg_runtime_dir.sh new file mode 100644 index 0000000..6d93359 --- /dev/null +++ b/.config/login.d/02_xdg_runtime_dir.sh @@ -0,0 +1,28 @@ +# This should be readable by /bin/sh + +# Set XDG_RUNTIME_DIR if we can +if [ -z "$XDG_RUNTIME_DIR" ] && shopt -q login_shell && type flock &>/dev/null; then + _diy_xdg_runtime_login() { + export XDG_RUNTIME_DIR="$XDG_CACHE_HOME/xdg-runtime-dir/$HOSTNAME" + # There's a race condition here, between the `ln -s` and `flock`. + # But it's not like I'll be hammering a box with logins. + if [ ! -d "$XDG_RUNTIME_DIR" ]; then + local tmp="$(mktemp -d --tmpdir -- "${USER}@${HOSTNAME}-runtime.XXXXXXXXXX")" + mkdir -p -- "$XDG_CACHE_HOME/xdg-runtime-dir" + ln -sfT -- "$tmp" "$XDG_RUNTIME_DIR" + fi + if ! [ /dev/fd/7 -ef "$XDG_CACHE_HOME/xdg-runtime-dir/.lock" ]; then + exec 7>"$XDG_CACHE_HOME/xdg-runtime-dir/.lock" + if flock -sn 7; then + # Unfortunately this doesn't survive across exec(1). + trap _diy_xdg_runtime_logout EXIT + fi + fi + } + _diy_xdg_runtime_logout() { + if flock -xn 7; then + rm -rf -- "$(readlink "$XDG_RUNTIME_DIR")" + fi + } + _diy_xdg_runtime_login +fi |