BUG#11878394 - MYSQLD_SAFE TEST FOR ALREADY RUNNING PROCESS

               FAILS, CAUSING CLOBBERED SOCKET

A check for running mysqld instances was failing in mysqld_safe
because of an incorrect shell command generated by cmake. The
problem is that cmake retains the '\' of escaped double-quote,
so the generated mysqld_safe script's command contained \" in
the shell command, and hence the failure. 

Fixed the command in scripts\CMakeLists.txt.

scripts/CMakeLists.txt

@@ -104,11 +104,11 @@ IF(UNIX)
   # FIND_PROC and CHECK_PID are used by mysqld_safe
 IF(CMAKE_SYSTEM_NAME MATCHES "Linux")
   SET (FIND_PROC 
-    "ps wwwp $PID | grep -v \" grep\" | grep -v mysqld_safe | grep -- \"$MYSQLD\" > /dev/null")
+    "ps wwwp $PID | grep -v mysqld_safe | grep -- $MYSQLD > /dev/null")
 ENDIF()
 IF(NOT FIND_PROC AND CMAKE_SYSTEM_NAME MATCHES "SunOS")
   SET (FIND_PROC 
-    "ps -p $PID | grep -v \" grep\" | grep -v mysqld_safe | grep -- \"$MYSQLD\" > /dev/null")
+    "ps -p $PID | grep -v mysqld_safe | grep -- $MYSQLD > /dev/null")
 ENDIF()
 
 IF(NOT FIND_PROC)
@@ -116,7 +116,7 @@ IF(NOT FIND_PROC)
   EXECUTE_PROCESS(COMMAND ps -uaxww OUTPUT_QUIET ERROR_QUIET RESULT_VARIABLE result)
   IF(result MATCHES 0) 
      SET( FIND_PROC
-        "ps -uaxww | grep -v \" grep\" | grep -v mysqld_safe | grep -- \"$MYSQLD\" | grep \" $PID \" > /dev/null")
+       "ps -uaxww | grep -v mysqld_safe | grep -- $MYSQLD | grep $PID > /dev/null")
   ENDIF()
 ENDIF()
 
@@ -124,7 +124,7 @@ IF(NOT FIND_PROC)
   # SysV style
   EXECUTE_PROCESS(COMMAND ps -ef OUTPUT_QUIET ERROR_QUIET RESULT_VARIABLE result)
   IF(result MATCHES 0)
-    SET( FIND_PROC "ps -ef | grep -v \" grep\" | grep -v mysqld_safe | grep -- \"$MYSQLD\" | grep \" $PID \" > /dev/null")
+    SET( FIND_PROC "ps -ef | grep -v mysqld_safe | grep -- $MYSQLD | grep $PID > /dev/null")
   ENDIF()
 ENDIF()