1 /* $NetBSD: pnullfs.c,v 1.18 2008/11/26 14:03:48 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
38 static void usage(void);
39
40 static void
usage()41 usage()
42 {
43
44 errx(1, "usage: %s [-s] [-o mntopts] nullpath mountpath",
45 getprogname());
46 }
47
48 int
main(int argc,char * argv[])49 main(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;
58 int ch;
59 int detach;
60
61 setprogname(argv[0]);
62
63 if (argc < 3)
64 usage();
65
66 pflags = mntflags = 0;
67 detach = 1;
68 while ((ch = getopt(argc, argv, "o:s")) != -1) {
69 switch (ch) {
70 case 'o':
71 mp = getmntopts(optarg, puffsmopts, &mntflags, &pflags);
72 if (mp == NULL)
73 err(1, "getmntopts");
74 freemntopts(mp);
75 break;
76 case 's':
77 detach = 0;
78 break;
79 }
80 }
81 pflags |= PUFFS_FLAG_BUILDPATH;
82 argv += optind;
83 argc -= optind;
84
85 if (pflags & PUFFS_FLAG_OPDUMP)
86 detach = 0;
87
88 if (argc != 2)
89 usage();
90
91 if (lstat(argv[0], &sb) == -1)
92 err(1, "stat %s", argv[0]);
93 if ((sb.st_mode & S_IFDIR) == 0)
94 errx(1, "%s is not a directory", argv[0]);
95
96 PUFFSOP_INIT(pops);
97 puffs_null_setops(pops);
98
99 if ((pu = puffs_init(pops, argv[0], "pnullfs", NULL, pflags)) == NULL)
100 err(1, "init");
101
102 pn_root = puffs_pn_new(pu, NULL);
103 if (pn_root == NULL)
104 err(1, "puffs_pn_new");
105 puffs_setroot(pu, pn_root);
106 puffs_setfhsize(pu, 0, PUFFS_FHFLAG_PASSTHROUGH);
107
108 po_root = puffs_getrootpathobj(pu);
109 if (po_root == NULL)
110 err(1, "getrootpathobj");
111 po_root->po_path = argv[0];
112 po_root->po_len = strlen(argv[0]);
113 puffs_stat2vattr(&pn_root->pn_va, &sb);
114
115 if (detach)
116 if (puffs_daemon(pu, 1, 1) == -1)
117 err(1, "puffs_daemon");
118
119 if (puffs_mount(pu, argv[1], mntflags, pn_root) == -1)
120 err(1, "puffs_mount");
121 if (puffs_mainloop(pu) == -1)
122 err(1, "mainloop");
123
124 return 0;
125 }
126