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32 .\" From: @(#)savecore.8 8.1 (Berkeley) 6/5/93
35 .Dd September 23, 1994
40 .Nd "save a core dump of the operating system"
46 .Op Ar directory Op Ar device ...
51 copies a core dump into
53 or the current working directory if no
56 and enters a reboot message and information about the core dump into
59 The options are as follows:
60 .Bl -tag -width indent
62 Clear the dump, so that future invocations of
66 Force a dump to be taken even if the dump was cleared.
68 Do not clear the dump after saving it.
70 Print out some additional debugging information.
72 Compress the core dump and kernel (see
79 looks for dumps on each device specified by the
81 argument(s), or on each device in
90 checks the core dump in various ways to make sure that it is complete.
91 If it passes these checks, it saves the core image in
92 .Ar directory Ns Pa /vmcore.#
93 and information about the core in
94 .Ar directory Ns Pa /info.#
95 The ``#'' is the number from the first line of the file
96 .Ar directory Ns Pa /bounds ,
97 and it is incremented and stored back into the file each time
104 also checks the available disk space before attempting to make the copies.
105 If there is insufficient disk space in the filesystem containing
108 .Ar directory Ns Pa /minfree
109 exists and the number of free kilobytes (for non-superusers) in the
110 filesystem after the copies were made would be less than the number
111 in the first line of this file, the copies are not attempted.
115 successfully copies the kernel and the core dump, the core dump is cleared
116 so that future invocations of
123 is meant to be called near the end of the initialization file
128 The minfree code does not consider the effect of compression or sparse files.