pnullfs.c revision 1.7 
1/*	$NetBSD: pnullfs.c,v 1.7 2007/04/13 13:35:46 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 puffs_pathobj *po_root;
59	struct puffs_node *pn_root;
60	struct statvfs svfsb;
61	struct stat sb;
62	mntoptparse_t mp;
63	int mntflags, pflags, lflags;
64	int ch;
65
66	setprogname(argv[0]);
67
68	if (argc < 3)
69		usage();
70
71	pflags = lflags = mntflags = 0;
72	while ((ch = getopt(argc, argv, "o:s")) != -1) {
73		switch (ch) {
74		case 'o':
75			mp = getmntopts(optarg, puffsmopts, &mntflags, &pflags);
76			if (mp == NULL)
77				err(1, "getmntopts");
78			freemntopts(mp);
79			break;
80		case 's':
81			lflags |= PUFFSLOOP_NODAEMON;
82			break;
83		}
84	}
85	pflags |= PUFFS_FLAG_BUILDPATH;
86	argv += optind;
87	argc -= optind;
88
89	if (pflags & PUFFS_FLAG_OPDUMP)
90		lflags = PUFFSLOOP_NODAEMON;
91
92	if (argc != 2)
93		usage();
94
95	PUFFSOP_INIT(pops);
96
97	PUFFSOP_SET(pops, puffs_null, fs, statvfs);
98	PUFFSOP_SETFSNOP(pops, unmount);
99	PUFFSOP_SETFSNOP(pops, sync);
100
101	PUFFSOP_SET(pops, puffs_null, node, lookup);
102	PUFFSOP_SET(pops, puffs_null, node, create);
103	PUFFSOP_SET(pops, puffs_null, node, mknod);
104	PUFFSOP_SET(pops, puffs_null, node, getattr);
105	PUFFSOP_SET(pops, puffs_null, node, setattr);
106	PUFFSOP_SET(pops, puffs_null, node, fsync);
107	PUFFSOP_SET(pops, puffs_null, node, remove);
108	PUFFSOP_SET(pops, puffs_null, node, link);
109	PUFFSOP_SET(pops, puffs_null, node, rename);
110	PUFFSOP_SET(pops, puffs_null, node, mkdir);
111	PUFFSOP_SET(pops, puffs_null, node, rmdir);
112	PUFFSOP_SET(pops, puffs_null, node, symlink);
113	PUFFSOP_SET(pops, puffs_null, node, readlink);
114	PUFFSOP_SET(pops, puffs_null, node, readdir);
115	PUFFSOP_SET(pops, puffs_null, node, read);
116	PUFFSOP_SET(pops, puffs_null, node, write);
117	PUFFSOP_SET(pops, puffs_null, node, reclaim);
118
119	if ((pu = puffs_mount(pops, argv[1], mntflags, "pnullfs", NULL,
120	    pflags)) == NULL)
121		err(1, "mount");
122
123	if (statvfs(argv[0], &svfsb) == -1)
124		err(1, "statvfs %s", argv[0]);
125
126	pn_root = puffs_pn_new(pu, NULL);
127	if (pn_root == NULL)
128		err(1, "puffs_pn_new");
129	puffs_setroot(pu, pn_root);
130
131	po_root = puffs_getrootpathobj(pu);
132	if (po_root == NULL)
133		err(1, "getrootpathobj");
134	po_root->po_path = argv[0];
135	po_root->po_len = strlen(argv[0]);
136	if (stat(argv[0], &sb) == -1)
137		err(1, "stat %s", argv[0]);
138	puffs_stat2vattr(&pn_root->pn_va, &sb);
139
140	if (puffs_start(pu, pn_root, &svfsb) == -1)
141		err(1, "puffs_start");
142
143	if (puffs_mainloop(pu, lflags) == -1)
144		err(1, "mainloop");
145
146	return 0;
147}
148