Misc code quality improvements to find-pid

1 files changed, 6 insertions, 6 deletions

diff --git a/container-core/src/main/sh/find-pid b/container-core/src/main/sh/find-pid
index 5533488c24d..88c4c7df2aa 100755
--- a/container-core/src/main/sh/find-pid
+++ b/container-core/src/main/sh/find-pid
@@ -76,23 +76,23 @@ findhost
 
 set -euo pipefail
 
-if [ $# -ne 1 ]; then
+if (( $# != 1 )); then
   echo "Usage: $0 <service-config-id>" >&2
   exit 1
 fi
 
-readonly service=$1
-readonly status=$(vespa-sentinel-cmd list 2>/dev/null | grep "id=\"${service}\"")
+readonly config_id=$1
+readonly status=$(vespa-sentinel-cmd list 2>/dev/null | grep "id=\"${config_id}\"")
 if [ -z "${status}" ]; then
-  echo "No service named '${service}'" >&2
+  echo "No service named '${config_id}'" >&2
   exit 1
 fi
 readonly pid=$(echo ${status} | cut -d " "  -f 4 | cut -d "=" -f 2)
 if ! [[ "${pid}" =~ ^[0-9]+$ ]]; then
-  echo "Could not find valid pid for '${service}' (pid='${pid}')" >&2
+  echo "Could not find valid pid for '${config_id}' (pid='${pid}')" >&2
   exit 1
 fi
-if ! [ -n $(ps -p ${pid} -o pid=) ]; then
+if [ -z "$(ps -p ${pid} -o pid=)" ]; then
   echo "Could not find process for '${pid}'" >&2
   exit 1
 fi