— save a
core dump of the operating system
copies the currently running kernel and
its associated core dump into directory
enters a reboot message and information about the core dump into the system
The options are as follows:
- Clears the dump, so that future invocations of
savecore will ignore it.
- Forces a dump to be taken even if the dump doesn't appear
correct or there is insufficient disk space.
- Use system as the kernel
instead of the default /bsd.
- Prints out some additional debugging information.
- Compresses the core dump and kernel (see
checks the core dump in various ways to
make sure that it is current and that it corresponds to the currently running
system. If it passes these checks, it saves the core image in
and the system in
respectively, if the -z
option is used). The
“#” is the number from the first line of the file
and it is incremented and stored back into the file each time
also checks the available disk space
before attempting to make the copies. If there is insufficient disk space in
the filesystem containing directory
, or if
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.
successfully copies the kernel and the
core dump, the core dump is cleared so that future invocations of
will ignore it.
is meant to be called near the end of the
initialization file /etc/rc
- current kernel
command appeared in
The minfree code does not consider the effect of compression.