kldunload,

Standard C Library (libc, -lc)

#include <sys/param.h>
#include <sys/linker.h>

int
kldunload(int fileid);

int
kldunloadf(int fileid, int flags);

The kldunload() system call unloads a kld file from the kernel that was previously linked via kldload(2).

The kldunloadf() system call accepts an additional flags argument, which may be one of LINKER_UNLOAD_NORMAL, giving the same behavior as kldunload(), or LINKER_UNLOAD_FORCE, which causes the unload to ignore a failure to quiesce the module.

Upon successful completion, the value 0 is returned; otherwise the value -1 is returned and the global variable errno is set to indicate the error.

The file referred to by fileid is unloaded unless:

[EPERM]

You do not have access to unlink the file from the kernel.

[ENOENT]

The file was not found.

[EBUSY]

You attempted to unload a file linked by the kernel.

[EINVAL]

The kldunloadf() system call was passed invalid flags.

kldfind(2), kldfirstmod(2), kldload(2), kldnext(2), kldstat(2), kldsym(2), modfind(2), modfnext(2), modnext(2), modstat(2), kld(4), kldunload(8)

The kld interface first appeared in FreeBSD 3.0.