cert-info: add macOS compatibility

1 files changed, 11 insertions, 7 deletions

diff --git a/cert-info b/cert-info
index 28865bd..e6e38fe 100755
--- a/cert-info
+++ b/cert-info
@@ -18,12 +18,16 @@ auto_less() {
 	[ ! -t 1 ] || { "$0" "$@" | less; exit $?; }
 }
 
+# Compatibility for macOS
+type timeout 2>/dev/null >&2 ||
+timeout() { perl -e 'alarm shift; exec @ARGV' "$@"; }
+
 main() {
 if [ "$1" = "csv" ]; then
 	[ $# -ge 2 ] || usage "Missing outdir"
 	outdir="${2:-.}/"
 	mkdir -p "$outdir"
-	tmp=$(mktemp); trap "rm -f $tmp" EXIT
+	tmp=$(mktemp); trap 'rm -f "$tmp"' EXIT
 	shift 2
 	for arg; do parse_arg "$arg" || usage "Unrecognized option $arg"; done
 	i=0
@@ -50,21 +54,21 @@ elif [ ! -t 0 ]; then
 elif [ $# -gt 0 ]; then
 	auto_less "$@"
 	for arg; do
-	 	! parse_arg "$arg" || continue
+		! parse_arg "$arg" || continue
 		host="${arg%%:*}"
 		port="${arg##*:}"
-		[ "$port" != "$arg" -a -n "$port" ] || port=443
+		[ "$port" != "$arg" ] && [ -n "$port" ] || port=443
 		echo "# === $host:$port ==="
 		get_cert "$host" "$port" | parse_cert
 	done
 else
 	usage
-fi 
+fi
 }
 
 get_cert() {
 	local host="$1" port="$2"
-	if ! nc -z -w 2 "$host" "$port"; then
+	if ! nc -z -w 2 "$host" "$port" 2>/dev/null; then
 		echo "# conn timeout for $host:$port!" >&2
 		return 1
 	fi
@@ -91,8 +95,8 @@ parse_arg +cert
 parse_cert() {
 	infocmd="openssl x509 -text -nameopt sep_comma_plus_space"
 	[ $include_cert -eq 1 ] || infocmd="$infocmd -noout"
-	awk -vOneOnly="$depth_1" -vCertOnly="$cert_only" \
-		-vinfocmd="$infocmd" '
+	awk -v OneOnly="$depth_1" -v CertOnly="$cert_only" \
+		-v infocmd="$infocmd" '
 BEGIN {
 	sep="# ";
 	for (i=0; i<77; i++) {