savecore - save a core dump of the operating system
The options are as follows:
The utility looks for dumps on each device specified by the device argument(s), or on each device in /etc/fstab marked as ``dump'' or ``swap'' The utility checks the core dump in various ways to make sure that it is complete. If it passes these checks, it saves the core image in directory /vmcore.# and information about the core in directory /info.# For kernel textdumps generated with the textdump(4) facility, output will be stored in the tar(5) format and named director /textdump.tar.# The ``#'' is the number from the first line of the file directory /bounds and it is incremented and stored back into the file each time successfully runs.
The utility also checks the available disk space before attempting to make the copies. If there is insufficient disk space in the file system containing directory or if the file directory /minfree exists and the number of free kilobytes (for non-superusers) in the file system after the copies were made would be less than the number in the first line of this file, the copies are not attempted.
If successfully copies the kernel and the core dump, the core dump is cleared so that future invocations of will ignore it.
The utility is meant to be called near the end of the initialization file /etc/rc (see rc(8)).
Support for kernel textdumps appeared in Fx 8.0 .
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Created 1996-2021 by Maxim Chirkov
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