/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright 2008 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ /* Copyright (c) 1988 AT&T */ /* All Rights Reserved */ #pragma ident "%Z%%M% %I% %E% SMI" /* * Attach a STREAMS or door based file descriptor to an object in the file * system name space. */ #pragma weak _fattach = fattach #include "lint.h" #include <sys/types.h> #include <errno.h> #include <stdio.h> #include <stropts.h> #include <sys/door.h> #include <sys/fs/namenode.h> #include <sys/mount.h> #include <unistd.h> #include <string.h> #include "libc.h" int fattach(int fildes, const char *path) { struct namefd namefdp; struct door_info dinfo; int s; char buf[MAXPATHLEN]; /* Only STREAMS and doors allowed to be mounted */ if ((s = isastream(fildes)) == 1 || __door_info(fildes, &dinfo) == 0) { namefdp.fd = fildes; if (path == NULL || *path == '\0') { errno = ENOENT; return (-1); } else if (*path != '/') { /* * The mount point must be an absolute path. */ if (getcwd(buf, sizeof (buf)) == NULL) { /* errno already set */ return (-1); } /* * The kernel will truncate the path if it would have * turned into something more than MAXPATHLEN bytes. * So we do the same here. */ if (strlcat(buf, "/", sizeof (buf)) >= sizeof (buf) || strlcat(buf, path, sizeof (buf)) >= sizeof (buf)) { errno = ENAMETOOLONG; return (-1); } path = buf; } return (mount((char *)NULL, path, MS_DATA|MS_NOMNTTAB, (const char *)"namefs", (char *)&namefdp, sizeof (struct namefd), NULL, 0)); } else if (s == 0) { /* Not a STREAM */ errno = EINVAL; return (-1); } else { /* errno already set */ return (-1); } }