Drop infinite loops in favor of finite wait_for

While at it, fix some shellcheck warnings, and s/fgrep/grep -F/g.

Change-Id: I093b7b4c196731b1ecc0c27a4111955b2e412762
Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>
(cherry picked from commit 089585ad5370109d4c2a476b94b0017153d7713d)

1 files changed, 2 insertions, 3 deletions

diff --git a/mcp/scripts/lib.sh b/mcp/scripts/lib.sh
index 748c6dde1..3a6deec21 100644
--- a/mcp/scripts/lib.sh
+++ b/mcp/scripts/lib.sh
@@ -144,13 +144,13 @@ function start_vms {
 function check_connection {
   local total_attempts=60
   local sleep_time=5
-  local attempt=1
 
   set +e
   echo '[INFO] Attempting to get into Salt master ...'
 
   # wait until ssh on Salt master is available
-  while ((attempt <= total_attempts)); do
+  # shellcheck disable=SC2034
+  for attempt in $(seq "${total_attempts}"); do
     # shellcheck disable=SC2086
     ssh ${SSH_OPTS} "ubuntu@${SALT_MASTER}" uptime
     case $? in
@@ -158,7 +158,6 @@ function check_connection {
       *) echo "${attempt}/${total_attempts}> ssh server ain't ready yet, waiting for ${sleep_time} seconds ..." ;;
     esac
     sleep $sleep_time
-    ((attempt+=1))
   done
   set -e
 }