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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.