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 * Copyright (c) 1999 The NetBSD Foundation, Inc. 5 * Copyright (c) 2015 The FreeBSD Foundation 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to The NetBSD Foundation 9 * by Bill Sommerfeld. 10 * 11 * Portions of this software were developed by Edward Tomasz Napierala 12 * under sponsorship from the FreeBSD Foundation. 13 * 14 * Redistribution and use in source and binary forms, with or without 15 * modification, are permitted provided that the following conditions 16 * are met: 17 * 1. Redistributions of source code must retain the above copyright 18 * notice, this list of conditions and the following disclaimer. 19 * 2. Redistributions in binary form must reproduce the above copyright 20 * notice, this list of conditions and the following disclaimer in the 21 * documentation and/or other materials provided with the distribution. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 24 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 25 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 26 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 27 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 28 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 29 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 32 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 33 * POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36 #include <sys/cdefs.h> 37 __FBSDID("$FreeBSD$"); 38 39 #include "opt_compat.h" 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/syscallsubr.h> 44 #include <sys/proc.h> 45 #include <sys/malloc.h> 46 47 #ifdef COMPAT_LINUX32 48 #include <machine/../linux32/linux.h> 49 #include <machine/../linux32/linux32_proto.h> 50 #else 51 #include <machine/../linux/linux.h> 52 #include <machine/../linux/linux_proto.h> 53 #endif 54 #include <compat/linux/linux_misc.h> 55 #include <compat/linux/linux_util.h> 56 57 /* 58 * Find pathname of process's current directory. 59 */ 60 int 61 linux_getcwd(struct thread *td, struct linux_getcwd_args *args) 62 { 63 char *path; 64 int error, lenused; 65 66 #ifdef DEBUG 67 if (ldebug(getcwd)) 68 printf(ARGS(getcwd, "%p, %ld"), args->buf, (long)args->bufsize); 69 #endif 70 71 /* 72 * Linux returns ERANGE instead of EINVAL. 73 */ 74 if (args->bufsize < 2) 75 return (ERANGE); 76 77 path = malloc(LINUX_PATH_MAX, M_LINUX, M_WAITOK); 78 79 error = kern___getcwd(td, path, UIO_SYSSPACE, args->bufsize, 80 LINUX_PATH_MAX); 81 if (error == 0) { 82 lenused = strlen(path) + 1; 83 error = copyout(path, args->buf, lenused); 84 if (error == 0) 85 td->td_retval[0] = lenused; 86 } 87 88 free(path, M_LINUX); 89 return (error); 90 } 91