diff --git a/scripts/svc.sh b/scripts/svc.sh
index 1a1fe3be..7741d1b1 100755
--- a/scripts/svc.sh
+++ b/scripts/svc.sh
@@ -1055,7 +1055,7 @@ proc_stop() {
 port_owner() {
   local port="${ENV_ADDR##*:}"
   if command -v ss >/dev/null 2>&1; then
-    ss -ltnp 2>/dev/null | awk -v p=":$port" '$4 ~ p"$" {print $0; exit}'
+    awk -v p=":$port" '$4 ~ p"$" {print $0; exit}' < <(ss -ltnp 2>/dev/null)
   fi
 }
 
@@ -3801,7 +3801,7 @@ resolve_db_config() {
   # conffile 的 dsn 键（二进制自行读文件，连接串不经环境重复传递）。
   local cf_dsn=""
   if [ -n "$p_conf" ] && [ -f "$p_conf" ]; then
-    cf_dsn="$(grep -oE '"dsn"[[:space:]]*:[[:space:]]*"[^"]*"' "$p_conf" 2>/dev/null | head -1 | sed -E 's/.*"([^"]*)"$/\1/')"
+    cf_dsn="$(sed -n '/"dsn"[[:space:]]*:[[:space:]]*"[^"]*"/{s//\n&/;s/.*\n"dsn"[[:space:]]*:[[:space:]]*"\([^"]*\)".*/\1/p;q;}' "$p_conf" 2>/dev/null)"
   fi
 
   # mock 档与数据库配置共存 = 冲突，拒绝（行为要明确，不隐式降级）。
@@ -5479,7 +5479,7 @@ db_ref_of() {
     cf="$(env_kv_of "$name" conffile)"
     [ -z "$cf" ] && cf="$(printf '%s' "$(env_kv_of "$name" exec)" | sed -n 's/.*--config \([^ ]*\).*/\1/p')"
     if [ -n "$cf" ] && [ -f "$cf" ]; then
-      dsn="$(grep -oE '"dsn"[[:space:]]*:[[:space:]]*"[^"]*"' "$cf" 2>/dev/null | head -1 | sed -E 's/.*"([^"]*)"$/\1/')"
+      dsn="$(sed -n '/"dsn"[[:space:]]*:[[:space:]]*"[^"]*"/{s//\n&/;s/.*\n"dsn"[[:space:]]*:[[:space:]]*"\([^"]*\)".*/\1/p;q;}' "$cf" 2>/dev/null)"
     fi
   fi
   [ -n "$dsn" ] || return 0