Bug 39290

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User-Agent: Mozilla/4.77 [en] (X11; U; Linux 2.2.17-14 i686)

Description of problem:
The rc.sysinit attempts to modify the /boot/System.map symlink
each time it is run.  This makes is annoying when one wants
to mount /boot as a read-only file system.

How reproducible:
Always

Steps to Reproduce:
1.build a system where /boot in on a separate file system
2.after the system is brought up and installed, change fstab
  so that /boot is mounted read-only
3.reboot
	

Actual Results:  On startup you see a message about attempting to modify
a read-only file system.

Expected Results:  No errors about attempts to write into /boot.
Since /boot/System.map is already a symlink
to the correct /boot/System.map-XYZZY file,
no attempt to reform the symlink should have
been made.

Additional info:

Try this symlink:

*** rc.sysinit.init	Sun May  6 14:49:19 2001
--- rc.sysinit	Sun May  6 14:49:19 2001
***************
*** 627,633 ****
  
  # Adjust symlinks as necessary in /boot to keep system services from
  # spewing messages about mismatched System maps and so on.
! if [ -L /boot/System.map -a -r /boot/System.map-`uname -r` ] ; then
  	ln -s -f System.map-`uname -r` /boot/System.map
  fi
  if [ ! -e /boot/System.map -a -r /boot/System.map-`uname -r` ] ; then
--- 627,634 ----
  
  # Adjust symlinks as necessary in /boot to keep system services from
  # spewing messages about mismatched System maps and so on.
! if [ -L /boot/System.map -a -r /boot/System.map-`uname -r` -a \
!      ! /boot/System.map -ef /boot/System.map-`uname -r` ] ; then
  	ln -s -f System.map-`uname -r` /boot/System.map
  fi
  if [ ! -e /boot/System.map -a -r /boot/System.map-`uname -r` ] ; then