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 (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 #pragma ident "%Z%%M% %I% %E% SMI" 27 28 /* Copyright (c) 1988 AT&T */ 29 /* All Rights Reserved */ 30 31 32 /* 33 * Attach a STREAMS or door based file descriptor to an object in the file 34 * system name space. 35 */ 36 #pragma weak fattach = _fattach 37 #include "synonyms.h" 38 #include <sys/types.h> 39 #include <errno.h> 40 #include <stdio.h> 41 #include <stropts.h> 42 #include <sys/door.h> 43 #include <sys/fs/namenode.h> 44 #include <sys/mount.h> 45 #include <unistd.h> 46 #include <string.h> 47 #include "libc.h" 48 49 int 50 fattach(int fildes, const char *path) 51 { 52 struct namefd namefdp; 53 struct door_info dinfo; 54 int s; 55 char buf[MAXPATHLEN]; 56 57 /* Only STREAMS and doors allowed to be mounted */ 58 if ((s = isastream(fildes)) == 1 || __door_info(fildes, &dinfo) == 0) { 59 namefdp.fd = fildes; 60 if (path == NULL || *path == '\0') { 61 errno = ENOENT; 62 return (-1); 63 } else if (*path != '/') { 64 /* 65 * The mount point must be an absolute path. 66 */ 67 if (getcwd(buf, sizeof (buf)) == NULL) { 68 /* errno already set */ 69 return (-1); 70 } 71 /* 72 * The kernel will truncate the path if it would have 73 * turned into something more than MAXPATHLEN bytes. 74 * So we do the same here. 75 */ 76 if (strlcat(buf, "/", sizeof (buf)) >= sizeof (buf) || 77 strlcat(buf, path, sizeof (buf)) >= sizeof (buf)) { 78 errno = ENAMETOOLONG; 79 return (-1); 80 } 81 path = buf; 82 } 83 return (mount((char *)NULL, path, MS_DATA|MS_NOMNTTAB, 84 (const char *)"namefs", (char *)&namefdp, 85 sizeof (struct namefd), NULL, 0)); 86 } else if (s == 0) { 87 /* Not a STREAM */ 88 errno = EINVAL; 89 return (-1); 90 } else { 91 /* errno already set */ 92 return (-1); 93 } 94 } 95