process the case where the parent can't be find out, i.e. missing ps

releng/inc/releng_getopts.inc

@@ -9,19 +9,31 @@ CLEANUP=1
 SPECIFIC_HELP=0
 START_DIR_DONT_CHANGE=`pwd`
 GEN_DATA_DIR=releng_generated_data/${SELF}
-RELENG_STANDALONE=1
-RELENG_PARENT=`ps -p $PPID -o comm=`
+RELENG_STANDALONE=-1
+RELENG_PARENT=unknown_parent
 
 #############################################
 standalone_or_supervised() {
- if test x"$RELENG_PARENT" = x"run_all_auto"
- then
-   echo "${SELF}: Running Supervised by ${RELENG_PARENT}"
-   RELENG_STANDALONE=0
- else
-   echo "${SELF}: Running Standalone"
-   RELENG_STANDALONE=1
- fi
+ which ps >/dev/null 2>&1
+ ret="$?"
+ case "$ret" in
+   0)
+     RELENG_PARENT=`ps -p $PPID -o comm=`
+     if test x"$RELENG_PARENT" = x"run_all_auto"
+     then
+       echo "${SELF}: Running in Supervised mode by ${RELENG_PARENT}"
+       RELENG_STANDALONE=0
+     else
+       echo "${SELF}: Running in Standalone mode"
+       RELENG_STANDALONE=1
+     fi
+  ;;
+  *)
+     echo "${SELF}: Running in Unknown mode by ${RELENG_PARENT}"
+  ;;
+esac
+
+
 }
 
 # Unconditionally initialize the invocation mode - standalone or supervised