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      1 /* $NetBSD: session.c,v 1.1 2022/01/22 07:53:06 pho Exp $ */
      2 
      3 /*
      4  * Copyright (c) 2021 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. The name of the author may not be used to endorse or promote
     16  *    products derived from this software without specific prior written
     17  *    permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
     20  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     21  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
     23  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
     25  * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     27  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
     28  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
     29  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #include <sys/cdefs.h>
     33 #if !defined(lint)
     34 __RCSID("$NetBSD: session.c,v 1.1 2022/01/22 07:53:06 pho Exp $");
     35 #endif /* !lint */
     36 
     37 #include <err.h>
     38 #include <fuse_internal.h>
     39 #include <puffs.h>
     40 
     41 /* The documentation for FUSE is not clear as to what "struct fuse_session" is,
     42  * why it exists, or how it's different from "struct fuse". For now we leave it
     43  * undefined (i.e. an incomplete type) and treat "struct fuse_session *" as
     44  * being identical to "struct fuse *". */
     45 
     46 struct fuse_session *
     47 fuse_get_session(struct fuse *f) {
     48     return (struct fuse_session*)f;
     49 }
     50 
     51 int
     52 fuse_session_fd(struct fuse_session *se) {
     53     struct fuse* fuse = (struct fuse*)se;
     54 
     55     /* We don't want to expose this to users, but filesystems in the wild often
     56      * wants to set FD_CLOEXEC on it. Hope they don't assume it's the real
     57      * /dev/fuse, because it's actually /dev/puffs in our implementation. */
     58     return puffs_getselectable(fuse->pu);
     59 }
     60 
     61 int
     62 fuse_set_signal_handlers(struct fuse_session *se) {
     63     return __fuse_set_signal_handlers((struct fuse*)se);
     64 }
     65 
     66 void
     67 fuse_remove_signal_handlers(struct fuse_session *se) {
     68     if (__fuse_remove_signal_handlers((struct fuse*)se) == -1)
     69         warn("%s: failed to remove signal handlers", __func__);
     70 }
     71