1 /* $OpenBSD: linux_getcwd.c,v 1.2 2001/05/16 12:50:21 ho Exp $ */ 2 /* $NetBSD: vfs_getcwd.c,v 1.3.2.3 1999/07/11 10:24:09 sommerfeld Exp $ */ 3 /*- 4 * SPDX-License-Identifier: BSD-2-Clause-NetBSD 5 * 6 * Copyright (c) 1999 The NetBSD Foundation, Inc. 7 * Copyright (c) 2015 The FreeBSD Foundation 8 * All rights reserved. 9 * 10 * This code is derived from software contributed to The NetBSD Foundation 11 * by Bill Sommerfeld. 12 * 13 * Portions of this software were developed by Edward Tomasz Napierala 14 * under sponsorship from the FreeBSD Foundation. 15 * 16 * Redistribution and use in source and binary forms, with or without 17 * modification, are permitted provided that the following conditions 18 * are met: 19 * 1. Redistributions of source code must retain the above copyright 20 * notice, this list of conditions and the following disclaimer. 21 * 2. Redistributions in binary form must reproduce the above copyright 22 * notice, this list of conditions and the following disclaimer in the 23 * documentation and/or other materials provided with the distribution. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 26 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 #include <sys/cdefs.h> 39 __FBSDID("$FreeBSD$"); 40 41 #include "opt_compat.h" 42 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/vnode.h> 46 #include <sys/proc.h> 47 #include <sys/malloc.h> 48 49 #ifdef COMPAT_LINUX32 50 #include <machine/../linux32/linux.h> 51 #include <machine/../linux32/linux32_proto.h> 52 #else 53 #include <machine/../linux/linux.h> 54 #include <machine/../linux/linux_proto.h> 55 #endif 56 #include <compat/linux/linux_misc.h> 57 #include <compat/linux/linux_util.h> 58 59 /* 60 * Find pathname of process's current directory. 61 */ 62 int 63 linux_getcwd(struct thread *td, struct linux_getcwd_args *uap) 64 { 65 char *buf, *retbuf; 66 size_t buflen; 67 int error; 68 69 buflen = uap->bufsize; 70 if (__predict_false(buflen < 2)) 71 return (ERANGE); 72 if (buflen > LINUX_PATH_MAX) 73 buflen = LINUX_PATH_MAX; 74 75 buf = malloc(buflen, M_TEMP, M_WAITOK); 76 error = vn_getcwd(td, buf, &retbuf, &buflen); 77 if (error == 0) { 78 error = copyout(retbuf, uap->buf, buflen); 79 if (error == 0) 80 td->td_retval[0] = buflen; 81 } 82 free(buf, M_TEMP); 83 return (error); 84 } 85