post_install: fix shellcheck warnings

cde/admin/IntegTools/post_install/linux/configMin.src

@@ -7,9 +7,6 @@ XCOMM  @(#) $TOG: configMin.src /main/1 1998/03/11 16:18:12 mgreess $
 XCOMM #######
 #define HASH #
 
-PRODUCT=CDE
-FILESET=CDE-MIN
-DO_CONFIGURATION=""
 retval=0
 
 FixEtcServices()
@@ -72,19 +69,19 @@ TMPFILE=/tmp/services
 
 RemoveMinFiles()
 {
-    while read SRC
+    while read -r SRC
     do
       if [ "$SRC" != "" ]
       then
-	rm -f $SRC
+	rm -f "$SRC"
 	dirname=${SRC%/STAR}
-	if [ -d $dirname ]
+	if [ -d "$dirname" ]
 	then
-	  cd $dirname
+	  cd "$dirname" || exit
 	  while [ "$dirname" != "$CDE_TOP" ]
 	  do
 	    cd ..
-	    rmdir ${dirname##STAR/} >/dev/null 2>/dev/null
+	    rmdir "${dirname##STAR/}" >/dev/null 2>/dev/null
 	    dirname=${dirname%/STAR}
 	  done
 	fi
@@ -102,7 +99,7 @@ XCOMM	  exists  correct correct correct  /usr/dt/foo1
 XCOMM	  MISSING  WRONG   WRONG   WRONG   /usr/dt/foo2
 XCOMM        exists    the link is correct    /usr/dt/link
 
-    while read SRC
+    while read -r SRC
     do
 #include "../verify.func"
     done <<-EOF
@@ -118,7 +115,7 @@ XCOMM Main Body
 XCOMM
 XCOMM ###############################################################
 
-  HandleOption $*
+  HandleOption "$*"
 
   if [ "$OPERATION" = "configure" ]
   then