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kldunload, kldunloadf - unload kld files
Standard C Library (libc, -lc)
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
The file referred to by fileid is unloaded unless:
[EPERM] You do not have access to unlink the file from the
[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),
The kld interface first appeared in FreeBSD 3.0.