mount_kernfs.c revision 1.16
1 /* $NetBSD: mount_kernfs.c,v 1.16 2005/01/31 05:19:19 erh 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\n\ 73 The Regents of the University of California. All rights reserved.\n"); 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 1.16 2005/01/31 05:19:19 erh 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 static const struct mntopt mopts[] = { 96 MOPT_STDOPTS, 97 MOPT_GETARGS, 98 { NULL } 99 }; 100 101 int main __P((int, char *[])); 102 int mount_kernfs __P((int argc, char **argv)); 103 static void usage __P((void)); 104 105 #ifndef MOUNT_NOMAIN 106 int 107 main(argc, argv) 108 int argc; 109 char **argv; 110 { 111 return mount_kernfs(argc, argv); 112 } 113 #endif 114 115 int 116 mount_kernfs(argc, argv) 117 int argc; 118 char *argv[]; 119 { 120 int ch, mntflags; 121 char canon_dir[MAXPATHLEN]; 122 123 mntflags = 0; 124 while ((ch = getopt(argc, argv, "o:")) != -1) 125 switch (ch) { 126 case 'o': 127 getmntopts(optarg, mopts, &mntflags, 0); 128 break; 129 case '?': 130 default: 131 usage(); 132 } 133 argc -= optind; 134 argv += optind; 135 136 if (argc != 2) 137 usage(); 138 139 if (realpath(argv[1], canon_dir) == NULL) /* Check mounton path */ 140 err(1, "realpath %s", argv[1]); 141 if (strncmp(argv[1], canon_dir, MAXPATHLEN)) { 142 warnx("\"%s\" is a relative path.", argv[1]); 143 warnx("using \"%s\" instead.", canon_dir); 144 } 145 146 if (mount(MOUNT_KERNFS, canon_dir, mntflags, NULL)) 147 err(1, "kernfs on %s", argv[1]); 148 exit(0); 149 } 150 151 static void 152 usage() 153 { 154 (void)fprintf(stderr, 155 "usage: mount_kernfs [-o options] /kern mount_point\n"); 156 exit(1); 157 } 158
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