1 /* $NetBSD: v21.c,v 1.1 2022/01/22 08:09:40 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: v21.c,v 1.1 2022/01/22 08:09:40 pho Exp $"); 35 #endif /* !lint */ 36 37 #include <err.h> 38 #include <fuse_internal.h> 39 40 /* Like FUSE 1.x, fuse_mount() is supposed to be called before 41 * fuse_new(). The argument "opts" is a comma-separated string of 42 * mount options. */ 43 int 44 fuse_mount_v21(const char *mountpoint, const char *opts) { 45 struct fuse_args args = FUSE_ARGS_INIT(0, NULL); 46 int nominal_fd = -1; 47 48 if (opts) { 49 if (fuse_opt_add_arg(&args, "-o") != 0) 50 goto free_args; 51 52 if (fuse_opt_add_arg(&args, opts) != 0) 53 goto free_args; 54 } 55 56 nominal_fd = fuse_mount_v25(mountpoint, &args); 57 58 free_args: 59 fuse_opt_free_args(&args); 60 return nominal_fd; 61 } 62 63 struct fuse * 64 fuse_new_v21(int fd, const char *opts, const void *op, 65 int op_version, void *user_data) { 66 struct fuse_chan* chan; 67 struct fuse* fuse; 68 int rv; 69 70 chan = fuse_chan_peek(fd); 71 if (!chan) { 72 warnx("%s: invalid channel: %d", __func__, fd); 73 return NULL; 74 } 75 76 /* "opts" is another set of options to be interpreted by the FUSE 77 * library, as opposed to the ones passed to fuse_mount() which is 78 * handled by Linux kernel. We don't have such a distinction, so 79 * insert them at argv[1] (not at the end of argv, because there 80 * may be non-options there). */ 81 if (opts) { 82 if (fuse_opt_insert_arg(fuse_chan_args(chan), 1, "-o") != 0) { 83 fuse_chan_destroy(chan); 84 return NULL; 85 } 86 if (fuse_opt_insert_arg(fuse_chan_args(chan), 2, opts) != 0) { 87 fuse_chan_destroy(chan); 88 return NULL; 89 } 90 } 91 92 fuse = __fuse_new(fuse_chan_args(chan), op, op_version, user_data); 93 if (!fuse) { 94 fuse_chan_destroy(chan); 95 return NULL; 96 } 97 fuse_chan_set_fuse(chan, fuse); 98 99 /* Now we can finally mount it. Hope it's not too late. */ 100 rv = fuse_mount_v30(fuse, fuse_chan_mountpoint(chan)); 101 if (rv != 0) { 102 fuse_destroy_v30(fuse); 103 fuse_chan_destroy(chan); 104 return NULL; 105 } 106 107 return fuse; 108 } 109