# 2.11BSD#431 - /usr/man/cat8/savecore.0

    SAVECORE(8)	    UNIX Programmer's Manual	      SAVECORE(8)

    NAME
         savecore - save a core dump of the operating system

    SYNOPSIS
         savecore dirname [ system ]

    DESCRIPTION
         Savecore is meant to be called at the end of the /etc/rc
         file.  Its function is to save the core dump of the system
         (if one was made) and to write a reboot message in the shut-
         down log.

         It saves the core image in the file dirname/core.n and its
         corresponding namelist in dirname/unix.n.	The second argu-
         ment is the namelist for the system which made the core
         image; the current system is always assumed to be /unix.
         The trailing ".n" in the pathnames is replaced by a number
         which grows every time savecore is run in that directory.

         Before savecore writes out a core image, it reads a number
         from the file dirname/minfree.  If there are fewer free
         blocks on the file system which contains dirname than the
         number obtained from the minfree file, the core dump is not
         done.  If the minfree file does not exist, savecore always
         writes out the core file (assuming that a core dump was
         taken).

         Savecore also writes a reboot message in the shut down log.
         If the system crashed as a result of a panic, savecore
         records the panic string in the shut down log too.

         If savecore detects that the system time is wrong because of
         a crash (the time in the core image is after the current
         time), it will reset the system time to its best estimate of
         the time, which is the time in the core image plus the
         elapsed time since the reboot.  It announces the time that
         it set when this occurs.

    FILES
         /usr/adm/shutdownlogshutdown log
         /unix		 current UNIX

    BUGS
         The method used to determine whether a dump is present, and
         to prevent the same core image from being saved multiple
         times, is not elegant.  This information should be passed to
         init by the system; however, this is difficult because the
         system may have to be rebooted a second time if the root
         filesystem is patched.

    Printed 11/24/99						1

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