1 /* $NetBSD: procfs_auxv.c,v 1.2 2017/03/30 20:21:00 christos Exp $ */ 2 3 /*- 4 * Copyright (c) 2017 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Christos Zoulas. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 #include <sys/cdefs.h> 32 __KERNEL_RCSID(0, "$NetBSD: procfs_auxv.c,v 1.2 2017/03/30 20:21:00 christos Exp $"); 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/proc.h> 37 #include <sys/kmem.h> 38 39 #include <miscfs/procfs/procfs.h> 40 41 int 42 procfs_doauxv(struct lwp *curl, struct proc *p, struct pfsnode *pfs, 43 struct uio *uio) 44 { 45 int error; 46 void *buffer; 47 size_t bufsize; 48 49 if (uio->uio_rw != UIO_READ) 50 return EOPNOTSUPP; 51 52 if ((error = proc_getauxv(p, &buffer, &bufsize)) != 0) 53 return error; 54 55 if (uio->uio_offset < bufsize) 56 error = uiomove((char *)buffer + uio->uio_offset, 57 bufsize - uio->uio_offset, uio); 58 else 59 error = 0; 60 61 kmem_free(buffer, bufsize); 62 return error; 63 } 64 65 int 66 procfs_validauxv(struct lwp *l, struct mount *mp) 67 { 68 return l != NULL && l->l_proc != NULL && l->l_proc->p_execsw != NULL; 69 } 70