savecore man page on BSDOS

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SAVECORE(8)		  BSD System Manager's Manual		   SAVECORE(8)

NAME
     savecore - save a core dump of the operating system

SYNOPSIS
     savecore -c
     savecore [-fvz] [-N kernel] directory

DESCRIPTION
     The savecore utility copies the kernel and its associated core dump into
     directory, and enters a reboot message and information about the core
     dump into the system log.

     The options are as follows:

     -c	  Clears the dump without saving it (so that future invocations of
	  savecore will ignore it).

     -f	  Forces a dump to be taken even if the dump doesn't appear correct or
	  there is insufficient disk space.

     -N	  Use kernel as the kernel that was running when the system crashed,
	  rather than the default ``/bsd''.

     -v	  Prints out some additional debugging information.

     -z	  Compresses the core dump and kernel (see compress(1)).

     The savecore utility checks the core dump in various ways to ensure that
     it is current and that it corresponds to the default or specified kernel.
     If those checks are successful, savecore copies the core image into
     directory/bsdcore.# and the kernel into directory/bsd.# The ``#'' is re-
     placed by the number from the first line of the file directory/bounds,
     which is incremented and stored back into the file each time savecore
     runs successfully.

     The savecore utility also checks the available disk space before attempt-
     ing to make the copies.  If there is insufficient disk space in the
     filesystem containing directory, or if the file directory/minfree exists
     and the number of free kilobytes (for non-superusers) in the filesystem
     after the copies were made would be less than the number in the first
     line of this file, the copies are not attempted.

     If savecore successfully copies the kernel and the core dump, the core
     dump is cleared so that future invocations of savecore will ignore it.

     In all cases, savecore requires that ``/bsd'' name the kernel that is
     currently running.

     The savecore utility is meant to be called near the end of the initial-
     ization file /etc/rc (see rc(8)).

FILES
     /bsd    default kernel

BUGS
     The minfree code does not consider the effect of compression.

SEE ALSO
     compress(1),  syslogd(8)

HISTORY
     The savecore command appeared in 4.1BSD.

4th Berkeley Distribution      September 2, 1994			     1
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