1 /* $NetBSD: mount_kernfs.c,v 1.24 2010/03/31 13:33:14 pooka Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993, 1994 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Jan-Simon Pendry. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 /* 36 * Copyright (c) 1990, 1992 Jan-Simon Pendry 37 * 38 * This code is derived from software contributed to Berkeley by 39 * Jan-Simon Pendry. 40 * 41 * Redistribution and use in source and binary forms, with or without 42 * modification, are permitted provided that the following conditions 43 * are met: 44 * 1. Redistributions of source code must retain the above copyright 45 * notice, this list of conditions and the following disclaimer. 46 * 2. Redistributions in binary form must reproduce the above copyright 47 * notice, this list of conditions and the following disclaimer in the 48 * documentation and/or other materials provided with the distribution. 49 * 3. All advertising materials mentioning features or use of this software 50 * must display the following acknowledgement: 51 * This product includes software developed by the University of 52 * California, Berkeley and its contributors. 53 * 4. Neither the name of the University nor the names of its contributors 54 * may be used to endorse or promote products derived from this software 55 * without specific prior written permission. 56 * 57 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 58 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 59 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 60 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 61 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 62 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 63 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 64 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 65 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 66 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 67 * SUCH DAMAGE. 68 */ 69 70 #include <sys/cdefs.h> 71 #ifndef lint 72 __COPYRIGHT("@(#) Copyright (c) 1992, 1993, 1994\ 73 The Regents of the University of California. All rights reserved."); 74 #endif /* not lint */ 75 76 #ifndef lint 77 #if 0 78 static char sccsid[] = "@(#)mount_kernfs.c 8.3 (Berkeley) 5/4/95"; 79 #else 80 __RCSID("$NetBSD: mount_kernfs.c,v 1.24 2010/03/31 13:33:14 pooka Exp $"); 81 #endif 82 #endif /* not lint */ 83 84 #include <sys/param.h> 85 #include <sys/mount.h> 86 87 #include <err.h> 88 #include <unistd.h> 89 #include <stdio.h> 90 #include <stdlib.h> 91 #include <string.h> 92 93 #include <mntopts.h> 94 95 #include "mount_kernfs.h" 96 97 static const struct mntopt mopts[] = { 98 MOPT_STDOPTS, 99 MOPT_GETARGS, 100 MOPT_NULL, 101 }; 102 103 int mount_kernfs(int argc, char **argv); 104 static void usage(void); 105 106 #ifndef MOUNT_NOMAIN 107 int 108 main(int argc, char **argv) 109 { 110 return mount_kernfs(argc, argv); 111 } 112 #endif 113 114 void 115 mount_kernfs_parseargs(int argc, char *argv[], void *dummy, int *mntflags, 116 char *canon_dev, char *canon_dir) 117 { 118 int ch; 119 mntoptparse_t mp; 120 121 *mntflags = 0; 122 while ((ch = getopt(argc, argv, "o:")) != -1) 123 switch (ch) { 124 case 'o': 125 mp = getmntopts(optarg, mopts, mntflags, 0); 126 if (mp == NULL) 127 err(1, "getmntopts"); 128 freemntopts(mp); 129 break; 130 case '?': 131 default: 132 usage(); 133 } 134 argc -= optind; 135 argv += optind; 136 137 if (argc != 2) 138 usage(); 139 140 /* not supported, fail silently */ 141 if (*mntflags & MNT_GETARGS) 142 exit(0); 143 144 strlcpy(canon_dev, argv[0], MAXPATHLEN); 145 if (realpath(argv[1], canon_dir) == NULL) /* Check mounton path */ 146 err(1, "realpath %s", argv[1]); 147 if (strncmp(argv[1], canon_dir, MAXPATHLEN)) { 148 warnx("\"%s\" is a relative path.", argv[1]); 149 warnx("using \"%s\" instead.", canon_dir); 150 } 151 } 152 153 int 154 mount_kernfs(int argc, char *argv[]) 155 { 156 char canon_dev[MAXPATHLEN], canon_dir[MAXPATHLEN]; 157 int mntflags; 158 159 mount_kernfs_parseargs(argc, argv, NULL, &mntflags, 160 canon_dev, canon_dir); 161 if (mount(MOUNT_KERNFS, canon_dir, mntflags, NULL, 0) == -1) 162 err(1, "kernfs on %s", argv[1]); 163 exit(0); 164 } 165 166 static void 167 usage(void) 168 { 169 (void)fprintf(stderr, 170 "usage: mount_kernfs [-o options] /kern mount_point\n"); 171 exit(1); 172 } 173