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

     savecore -- save a	core dump of the operating system

     savecore -c
     savecore [-fkvz] [-N system] directory

     The savecore utility copies the currently running kernel and its associ-
     ated core dump into directory, and	enters a reboot	message	and informa-
     tion about	the core dump into the system log.

     The options are as	follows:

     -c	     Clear the dump, so	that future invocations	of savecore will
	     ignore it.

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

     -k	     Do	not clear the dump after saving	it.

     -N	     Use system	as the kernel instead of the running kernel (as	deter-
	     mined from	getbootfile(3)).

     -v	     Print out some additional debugging information.

     -z	     Compress the core dump and	kernel (see gzip(1)).

     The savecore utility checks the core dump in various ways to make sure
     that it is	current	and that it corresponds	to the currently running sys-
     tem.  If it passes	these checks, it saves the core	image in
     directory/vmcore.#	and the	system in directory/kernel.# The ``#'' is the
     number from the first line	of the file directory/bounds, and it is	incre-
     mented and	stored back into the file each time savecore 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.

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

     The minfree code does not consider	the effect of compression.

     gzip(1), getbootfile(3), dumpon(8), syslogd(8)

     The savecore utility appeared in 4.1BSD.

FreeBSD	11.0		      September	23, 1994		  FreeBSD 11.0


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