pnullfs.c revision 1.12 
1/*	$NetBSD: pnullfs.c,v 1.12 2007/06/24 18:43:30 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 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS
16 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
17 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
18 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
21 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28/*
29 * pnullfs: puffs nullfs example
30 */
31
32#include <err.h>
33#include <puffs.h>
34#include <stdio.h>
35#include <stdlib.h>
36#include <unistd.h>
37
38static void usage(void);
39
40static void
41usage()
42{
43
44	errx(1, "usage: %s [-s]�[-o mntopts]�nullpath mountpath",
45	    getprogname());
46}
47
48int
49main(int argc, char *argv[])
50{
51	struct puffs_usermount *pu;
52	struct puffs_ops *pops;
53	struct puffs_pathobj *po_root;
54	struct puffs_node *pn_root;
55	struct stat sb;
56	mntoptparse_t mp;
57	int mntflags, pflags, lflags;
58	int ch;
59
60	setprogname(argv[0]);
61
62	if (argc < 3)
63		usage();
64
65	pflags = lflags = mntflags = 0;
66	while ((ch = getopt(argc, argv, "o:s")) != -1) {
67		switch (ch) {
68		case 'o':
69			mp = getmntopts(optarg, puffsmopts, &mntflags, &pflags);
70			if (mp == NULL)
71				err(1, "getmntopts");
72			freemntopts(mp);
73			break;
74		case 's':
75			lflags |= PUFFSLOOP_NODAEMON;
76			break;
77		}
78	}
79	pflags |= PUFFS_FLAG_BUILDPATH;
80	argv += optind;
81	argc -= optind;
82
83	if (pflags & PUFFS_FLAG_OPDUMP)
84		lflags = PUFFSLOOP_NODAEMON;
85
86	if (argc != 2)
87		usage();
88
89	if (lstat(argv[0], &sb) == -1)
90		err(1, "stat %s", argv[0]);
91	if ((sb.st_mode & S_IFDIR) == 0)
92		errx(1, "%s is not a directory", argv[0]);
93
94	PUFFSOP_INIT(pops);
95	puffs_null_setops(pops);
96
97	if ((pu = puffs_init(pops, "pnullfs", NULL, pflags)) == NULL)
98		err(1, "init");
99
100	pn_root = puffs_pn_new(pu, NULL);
101	if (pn_root == NULL)
102		err(1, "puffs_pn_new");
103	puffs_setroot(pu, pn_root);
104
105	po_root = puffs_getrootpathobj(pu);
106	if (po_root == NULL)
107		err(1, "getrootpathobj");
108	po_root->po_path = argv[0];
109	po_root->po_len = strlen(argv[0]);
110	puffs_stat2vattr(&pn_root->pn_va, &sb);
111
112	if (puffs_mount(pu, argv[1], mntflags, pn_root) == -1)
113		err(1, "puffs_mount");
114
115	if (puffs_mainloop(pu, lflags) == -1)
116		err(1, "mainloop");
117
118	return 0;
119}
120