From eabadd8e6a20252b8ff2f7fde35fd0976a421be8 Mon Sep 17 00:00:00 2001
From: root <root@localhost.localdomain>
Date: Wed, 20 Mar 2019 21:04:34 +0800
Subject: [PATCH] sg3_utils: fix syntax error

reason: when some variable not set, test its value, it will show
"test: =: unary operator expected" error message
---
 scripts/rescan-scsi-bus.sh | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/scripts/rescan-scsi-bus.sh b/scripts/rescan-scsi-bus.sh
index 4fa5e6c..9bfd3be 100755
--- a/scripts/rescan-scsi-bus.sh
+++ b/scripts/rescan-scsi-bus.sh
@@ -85,10 +85,10 @@ findhosts ()
   hosts=
   for driverdir in /proc/scsi/*; do
     driver=${driverdir#/proc/scsi/}
-    if test $driver = scsi -o $driver = sg -o $driver = dummy -o $driver = device_info; then continue; fi
+    if test x$driver = xscsi -o x$driver = xsg -o x$driver = xdummy -o x$driver = xdevice_info; then continue; fi
     for hostdir in $driverdir/*; do
       name=${hostdir#/proc/scsi/*/}
-      if test $name = add_map -o $name = map -o $name = mod_parm; then continue; fi
+      if test x$name = xadd_map -o x$name = xmap -o x$name = xmod_parm; then continue; fi
       num=$name
       driverinfo=$driver
       if test -r $hostdir/status; then
@@ -254,7 +254,7 @@ testonline ()
     print_and_scroll_back "$host:$channel:$id:$lun $SGDEV ($RMB) "
     test $RC = 2 -a "$RMB" = "1" && break
   done
-  if test $ctr != 0; then white_out; fi
+  if test x$ctr != x0; then white_out; fi
   # echo -e "\e[A\e[A\e[A${yellow}Test existence of $SGDEV = $RC ${norm} \n\n\n"
   if test $RC = 1; then return $RC; fi
   # Reset RC (might be !=0 for passive paths)
@@ -512,7 +512,7 @@ dolunscan()
       # Device not present
       printf "\r\e[A";
       # Optimization: if lun==0, stop here (only if in non-remove mode)
-      if test $lun = 0 -a -z "$remove" -a $optscan = 1; then 
+      if test x$lun = x0 -a -z "$remove" -a x$optscan = x1; then 
         break;
       fi
     else 
@@ -1193,7 +1193,7 @@ if [ -d /sys/class/scsi_host -a ! -w /sys/class/scsi_host ]; then
 fi  
 if test "$sync" = 1 -a "$remove" = 1; then sync=2; fi
 if test "$sync" = 2; then echo "Syncing file systems"; sync; fi
-if test -w /sys/module/scsi_mod/parameters/default_dev_flags -a $scan_flags != 0; then
+if test -w /sys/module/scsi_mod/parameters/default_dev_flags -a x$scan_flags != x0; then
   OLD_SCANFLAGS=`cat /sys/module/scsi_mod/parameters/default_dev_flags`
   NEW_SCANFLAGS=$(($OLD_SCANFLAGS|$scan_flags))
   if test "$OLD_SCANFLAGS" != "$NEW_SCANFLAGS"; then
-- 
2.19.1