savecore —
save a
core dump of the operating system
| savecore |
[-cfvz]
[-N
system]
directory |
savecore copies the currently running kernel and
its associated core dump into
directory, and
enters a reboot message and information about the core dump into the system
log.
The options are as follows:
-
-
- -c
- Clears the dump, so that future invocations of
savecore will ignore it.
-
-
- -f
- Forces a dump to be taken even if the dump doesn't appear
correct or there is insufficient disk space.
-
-
- -N
system
- Use system as the kernel
instead of the default /bsd.
-
-
- -v
- Prints out some additional debugging information.
-
-
- -z
- Compresses the core dump and kernel (see
compress(1)).
savecore 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
directory/bsd.#.core
and the system in
directory/bsd.#
(or in
directory/bsd.#.core.Z
and
directory/bsd.#.Z,
respectively, if the
-z option is used). 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
savecore successfully runs.
savecore 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
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.
savecore is meant to be called near the end of the
initialization file
/etc/rc (see
rc(8)).
- /bsd
- current kernel
compress(1),
crash(8),
syslogd(8)
The
savecore command appeared in
4.1BSD.
The minfree code does not consider the effect of compression.
![[OpenBSD]](/openbsd.gif){kind=small}