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 41 usage() 42 { 43 44 errx(1, "usage: %s [-s] [-o mntopts] nullpath mountpath", 45 getprogname()); 46 } 47 48 int 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