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 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/param.h> 39 #include <sys/malloc.h> 40 #include <sys/proc.h> 41 #include <sys/vnode.h> 42 43 #ifdef COMPAT_LINUX32 44 #include <machine/../linux32/linux.h> 45 #include <machine/../linux32/linux32_proto.h> 46 #else 47 #include <machine/../linux/linux.h> 48 #include <machine/../linux/linux_proto.h> 49 #endif 50 #include <compat/linux/linux_misc.h> 51 52 /* 53 * Find pathname of process's current directory. 54 */ 55 int 56 linux_getcwd(struct thread *td, struct linux_getcwd_args *uap) 57 { 58 char *buf, *retbuf; 59 size_t buflen; 60 int error; 61 62 buflen = uap->bufsize; 63 if (__predict_false(buflen < 2)) 64 return (ERANGE); 65 if (buflen > LINUX_PATH_MAX) 66 buflen = LINUX_PATH_MAX; 67 68 buf = malloc(buflen, M_TEMP, M_WAITOK); 69 error = vn_getcwd(buf, &retbuf, &buflen); 70 if (error == ENOMEM) 71 error = ERANGE; 72 if (error == 0) { 73 error = copyout(retbuf, uap->buf, buflen); 74 if (error == 0) 75 td->td_retval[0] = buflen; 76 } 77 free(buf, M_TEMP); 78 return (error); 79 } 80