pnullfs.c revision 1.3 
1/*	$NetBSD: pnullfs.c,v 1.3 2007/01/11 17:50:35 pooka Exp $	*/
2
3/*
4 * Copyright (c) 2007  Antti Kantee.  All Rights Reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 * 3. The name of the company nor the name of the author may be used to
15 *    endorse or promote products derived from this software without specific
16 *    prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
19 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 */
30
31/*
32 * pnullfs: puffs nullfs example
33 */
34
35#include <err.h>
36#include <puffs.h>
37#include <stdio.h>
38#include <stdlib.h>
39#include <unistd.h>
40
41PUFFSOP_PROTOS(puffs_null) /* XXX */
42
43static void usage(void);
44
45static void
46usage()
47{
48
49	errx(1, "usage: %s [-s]�[-o mntopts]�nullpath mountpath",
50	    getprogname());
51}
52
53int
54main(int argc, char *argv[])
55{
56	struct puffs_usermount *pu;
57	struct puffs_ops *pops;
58	struct statvfs svfsb;
59	struct stat sb;
60	mntoptparse_t mp;
61	int mntflags, pflags, lflags;
62	int ch;
63
64	setprogname(argv[0]);
65
66	if (argc < 3)
67		usage();
68
69	pflags = lflags = mntflags = 0;
70	while ((ch = getopt(argc, argv, "o:s")) != -1) {
71		switch (ch) {
72		case 'o':
73			mp = getmntopts(optarg, puffsmopts, &mntflags, &pflags);
74			if (mp == NULL)
75				err(1, "getmntopts");
76			freemntopts(mp);
77			break;
78		case 's':
79			lflags |= PUFFSLOOP_NODAEMON;
80			break;
81		}
82	}
83	pflags |= PUFFS_FLAG_BUILDPATH;
84	argv += optind;
85	argc -= optind;
86
87	if (pflags & PUFFS_FLAG_OPDUMP)
88		lflags = PUFFSLOOP_NODAEMON;
89
90	if (argc != 2)
91		usage();
92
93	PUFFSOP_INIT(pops);
94
95	PUFFSOP_SET(pops, puffs_null, fs, statvfs);
96	PUFFSOP_SETFSNOP(pops, unmount);
97	PUFFSOP_SETFSNOP(pops, sync);
98
99	PUFFSOP_SET(pops, puffs_null, node, lookup);
100	PUFFSOP_SET(pops, puffs_null, node, create);
101	PUFFSOP_SET(pops, puffs_null, node, mknod);
102	PUFFSOP_SET(pops, puffs_null, node, getattr);
103	PUFFSOP_SET(pops, puffs_null, node, setattr);
104	PUFFSOP_SET(pops, puffs_null, node, fsync);
105	PUFFSOP_SET(pops, puffs_null, node, remove);
106	PUFFSOP_SET(pops, puffs_null, node, link);
107	PUFFSOP_SET(pops, puffs_null, node, rename);
108	PUFFSOP_SET(pops, puffs_null, node, mkdir);
109	PUFFSOP_SET(pops, puffs_null, node, rmdir);
110	PUFFSOP_SET(pops, puffs_null, node, symlink);
111	PUFFSOP_SET(pops, puffs_null, node, readlink);
112	PUFFSOP_SET(pops, puffs_null, node, readdir);
113	PUFFSOP_SET(pops, puffs_null, node, read);
114	PUFFSOP_SET(pops, puffs_null, node, write);
115
116	if ((pu = puffs_mount(pops, argv[1], mntflags, "pnullfs", NULL,
117	    pflags, 0)) == NULL)
118		err(1, "mount");
119
120	if (statvfs(argv[0], &svfsb) == -1)
121		err(1, "statvfs %s", argv[0]);
122
123	pu->pu_pn_root = puffs_pn_new(pu, NULL);
124	if (pu->pu_pn_root == NULL)
125		err(1, "puffs_pn_new");
126	puffs_setrootpath(pu, argv[0]);
127	if (stat(argv[0], &sb) == -1)
128		err(1, "stat %s", argv[0]);
129	puffs_stat2vattr(&pu->pu_pn_root->pn_va, &sb);
130
131	if (puffs_start(pu, pu->pu_pn_root, &svfsb) == -1)
132		err(1, "puffs_start");
133
134	if (puffs_mainloop(pu, lflags) == -1)
135		err(1, "mainloop");
136
137	return 0;
138}
139