1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 /* Copyright (c) 1988 AT&T */ 30 /* All Rights Reserved */ 31 32 33 /* 34 * Attach a STREAMS or door based file descriptor to an object in the file 35 * system name space. 36 */ 37 #pragma weak fattach = _fattach 38 #include "synonyms.h" 39 #include <sys/types.h> 40 #include <errno.h> 41 #include <stdio.h> 42 #include <stropts.h> 43 #include <sys/vnode.h> 44 #include <sys/door.h> 45 #include <sys/fs/namenode.h> 46 #include <sys/mount.h> 47 #include <unistd.h> 48 #include <string.h> 49 #include "libc.h" 50 51 int 52 fattach(int fildes, const char *path) 53 { 54 struct namefd namefdp; 55 struct door_info dinfo; 56 int s; 57 char buf[MAXPATHLEN]; 58 59 /* Only STREAMS and doors allowed to be mounted */ 60 if ((s = isastream(fildes)) == 1 || __door_info(fildes, &dinfo) == 0) { 61 namefdp.fd = fildes; 62 if (path == NULL || *path == '\0') { 63 errno = ENOENT; 64 return (-1); 65 } else if (*path != '/') { 66 /* 67 * The mount point must be an absolute path. 68 */ 69 if (getcwd(buf, sizeof (buf)) == NULL) { 70 /* errno already set */ 71 return (-1); 72 } 73 /* 74 * The kernel will truncate the path if it would have 75 * turned into something more than MAXPATHLEN bytes. 76 * So we do the same here. 77 */ 78 if (strlcat(buf, "/", sizeof (buf)) >= sizeof (buf) || 79 strlcat(buf, path, sizeof (buf)) >= sizeof (buf)) { 80 errno = ENAMETOOLONG; 81 return (-1); 82 } 83 path = buf; 84 } 85 return (mount((char *)NULL, path, MS_DATA|MS_NOMNTTAB, 86 (const char *)"namefs", (char *)&namefdp, 87 sizeof (struct namefd), NULL, 0)); 88 } else if (s == 0) { 89 /* Not a STREAM */ 90 errno = EINVAL; 91 return (-1); 92 } else { 93 /* errno already set */ 94 return (-1); 95 } 96 } 97