KLDUNLOAD(2)              FreeBSD System Calls Manual             KLDUNLOAD(2)

NAME
     kldunload, kldunloadf - unload kld files

LIBRARY
     Standard C Library (libc, -lc)

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

     int
     kldunload(int fileid);

     int
     kldunloadf(int fileid, int flags);

DESCRIPTION
     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.

RETURN VALUES
     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.

ERRORS
     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.

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

HISTORY
     The kld interface first appeared in FreeBSD 3.0.

FreeBSD 13.1-RELEASE-p6        December 25, 2008       FreeBSD 13.1-RELEASE-p6