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28 .\" From: @(#)savecore.8 8.1 (Berkeley) 6/5/93
29 .\" $FreeBSD: src/sbin/savecore/savecore.8 2005/02/24 02:45:10 obrien Exp $
30 .\" $DragonFly: src/sbin/savecore/savecore.8,v 1.7 2006/10/20 18:30:12 corecode Exp $
37 .Nd "save a core dump of the operating system"
44 .Op Ar directory device
47 .Op Ar directory Op Ar device ...
52 copies the currently running kernel and its associated core dump into
54 or the current working directory if no
57 and enters a reboot message and information about the core dump into
60 The options are as follows:
61 .Bl -tag -width indent
63 Check to see if a dump exists,
64 and display a brief message to indicate the status.
65 An exit status of 0 indicates that a dump is there,
66 1 indicates that none exists.
67 This option is compatible only with the
71 Clear the dump, so that future invocations of
75 Force a dump to be taken even if either the dump was cleared or if the
76 dump header information is inconsistent.
78 Do not clear the dump after saving it.
80 Print out some additional debugging information.
82 Compress the core dump and kernel (see
89 looks for dumps on each device specified by the
91 argument(s), or on each device in
100 checks the core dump in various ways to make sure that it is complete.
101 If it passes these checks, it saves the core image in
102 .Ar directory Ns Pa /vmcore.#
104 .Ar directory Ns Pa /kernel.#
105 and information about the core in
106 .Ar directory Ns Pa /info.#
107 The ``#'' is the number from the first line of the file
108 .Ar directory Ns Pa /bounds ,
109 and it is incremented and stored back into the file each time
116 also checks the available disk space before attempting to make the copies.
117 If there is insufficient disk space in the filesystem containing
120 .Ar directory Ns Pa /minfree
121 exists and the number of free kilobytes (for non-superusers) in the
122 filesystem after the copies were made would be less than the number
123 in the first line of this file, the copies are not attempted.
127 successfully copies the kernel and the core dump, the core dump is cleared
128 so that future invocations of
135 is meant to be called near the end of the initialization file
151 The minfree code does not consider the effect of compression or sparse files.