512bff9c9f
Rename YARROW_RNG and FORTUNA_RNG to RANDOM_YARROW and RANDOM_FORTUNA. Add the RANDOM_* options to LINT.
97 lines
2.8 KiB
C
97 lines
2.8 KiB
C
/*-
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* Copyright (c) 2013 Mark R V Murray
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer
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* in this position and unchanged.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_random.h"
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#ifdef RANDOM_RWFILE
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/proc.h>
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#include <sys/namei.h>
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#include <sys/fcntl.h>
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#include <sys/vnode.h>
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#include <dev/random/rwfile.h>
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int
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randomdev_read_file(const char *filename, void *buf, size_t length)
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{
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struct nameidata nd;
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struct thread* td = curthread;
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int error;
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ssize_t resid;
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int flags;
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NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, filename, td);
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flags = FREAD;
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error = vn_open(&nd, &flags, 0, NULL);
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if (error == 0) {
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NDFREE(&nd, NDF_ONLY_PNBUF);
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if (nd.ni_vp->v_type != VREG)
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error = ENOEXEC;
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else
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error = vn_rdwr(UIO_READ, nd.ni_vp, buf, length, 0, UIO_SYSSPACE, IO_NODELOCKED, td->td_ucred, NOCRED, &resid, td);
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VOP_UNLOCK(nd.ni_vp, 0);
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vn_close(nd.ni_vp, FREAD, td->td_ucred, td);
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}
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return (error);
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}
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int
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randomdev_write_file(const char *filename, void *buf, size_t length)
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{
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struct nameidata nd;
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struct thread* td = curthread;
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int error;
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ssize_t resid;
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int flags;
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NDINIT(&nd, LOOKUP, FOLLOW, UIO_SYSSPACE, filename, td);
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flags = FWRITE | O_CREAT | O_TRUNC;
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error = vn_open(&nd, &flags, 0, NULL);
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if (error == 0) {
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NDFREE(&nd, NDF_ONLY_PNBUF);
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if (nd.ni_vp->v_type != VREG)
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error = ENOEXEC;
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else
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error = vn_rdwr(UIO_WRITE, nd.ni_vp, buf, length, 0, UIO_SYSSPACE, IO_NODELOCKED, td->td_ucred, NOCRED, &resid, td);
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VOP_UNLOCK(nd.ni_vp, 0);
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vn_close(nd.ni_vp, FREAD, td->td_ucred, td);
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}
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return (error);
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}
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#endif
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