From 2cd96429dba2cc8170a9d8dbcdb7db46902661de Mon Sep 17 00:00:00 2001 From: "Jason A. Donenfeld" Date: Tue, 31 Oct 2017 18:13:31 +0100 Subject: wg-quick: fsync the temporary file before renaming This ensures that on an unclean shutdown, we either see the old content or the new content, but not empty content. Suggested-by: Ka Ho Ng --- src/tools/wg-quick.bash | 1 + 1 file changed, 1 insertion(+) (limited to 'src/tools/wg-quick.bash') diff --git a/src/tools/wg-quick.bash b/src/tools/wg-quick.bash index da4c0d4..7dc8be1 100755 --- a/src/tools/wg-quick.bash +++ b/src/tools/wg-quick.bash @@ -197,6 +197,7 @@ save_config() { current_config="$(cmd wg showconf "$INTERFACE")" trap 'rm -f "$CONFIG_FILE.tmp"; exit' INT TERM EXIT echo "${current_config/\[Interface\]$'\n'/$new_config}" > "$CONFIG_FILE.tmp" || die "Could not write configuration file" + sync "$CONFIG_FILE.tmp" mv "$CONFIG_FILE.tmp" "$CONFIG_FILE" || die "Could not move configuration file" trap - INT TERM EXIT umask "$old_umask" -- cgit v1.2.3-59-g8ed1b