Always default port to 122

Author: jianghao0718

bin/ghe-host-check

@@ -52,37 +52,8 @@ options="
 port=$(ssh_port_part "$host")
 hostname=$(ssh_host_part "$host")
 
-set +e
+# ghe-negotiate-version verifies if the target is a Github Enterprise Server instance
 output=$(echo "ghe-negotiate-version backup-utils $BACKUP_UTILS_VERSION" | ghe-ssh -o BatchMode=no $options $host -- /bin/sh 2>&1)
-rc=$?
-set -e
-
-if [ $rc -ne 0 ]; then
-  case $rc in
-  255)
-    if echo "$output" | grep -i "port 22: Network is unreachable\|port 22: connection refused\|port 22: no route to host\|ssh_exchange_identification: Connection closed by remote host\|Connection timed out during banner exchange\|port 22: Connection timed out" >/dev/null; then
-      exec "$(basename $0)" "$hostname:122"
-    fi
-
-    echo "$output" 1>&2
-    echo "Error: ssh connection with '$host' failed" 1>&2
-    echo "Note that your SSH key needs to be setup on $host as described in:" 1>&2
-    echo "* https://enterprise.github.com/help/articles/adding-an-ssh-key-for-shell-access" 1>&2
-    ;;
-  101)
-    echo "Error: couldn't read GitHub Enterprise Server fingerprint on '$host' or this isn't a GitHub appliance." 1>&2
-    ;;
-  1)
-    if [ "${port:-22}" -eq 22 ] && echo "$output" | grep "use port 122" >/dev/null; then
-      exec "$(basename $0)" "$hostname:122"
-    else
-      echo "$output" 1>&2
-    fi
-    ;;
-
-  esac
-  exit $rc
-fi
 
 CLUSTER=false
 if ghe-ssh "$host" -- \

share/github-backup-utils/ghe-backup-config

@@ -334,7 +334,12 @@ ssh_host_part() {
 # This is used primarily to break hostspecs with non-standard ports down for
 # rsync commands.
 ssh_port_part() {
-  [ "${1##*:}" = "$1" ] && echo 22 || echo "${1##*:}"
+  if [ "${1##*:}" != "$1" ] && [ "${1##*:}" -ne "122" ]; then
+    echo "Error: SSH port has to be 122 connecting to Github Enterprise Server, current value is ${1##*:} for $1." 1>&2
+    exit 1
+  fi
+
+  echo 122
 }
 
 # Usage: ghe_remote_logger <message>...