1 /*- 2 * Copyright (c) 2018 The NetBSD Foundation, Inc. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to The NetBSD Foundation 6 * by Christos Zoulas. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 27 * POSSIBILITY OF SUCH DAMAGE. 28 */ 29 30 #include <sys/param.h> 31 #include <sys/mount.h> 32 33 #include <err.h> 34 #include <mntopts.h> 35 #include <stdio.h> 36 #include <stdlib.h> 37 #include <string.h> 38 #include <sysexits.h> 39 #include <unistd.h> 40 41 #include <vfs/autofs/autofs_mount.h> 42 43 #include "mount_autofs.h" 44 45 /* 46 * Copied from NetBSD. 47 * There is a reason to have const char*, so keep them const. 48 */ 49 #define __UNCONST(a) ((void *)(unsigned long)(const void *)(a)) 50 51 static const struct mntopt mopts[] = { 52 MOPT_STDOPTS, 53 MOPT_NULL, 54 }; 55 56 static void usage(void) __dead2; 57 58 int 59 main(int argc, char **argv) 60 { 61 return mount_autofs(argc, argv); 62 } 63 64 void 65 mount_autofs_parseargs(int argc, char *argv[], void *v, int *mntflags, 66 char *canon_dev, char *canon_dir) 67 { 68 int ch; 69 struct autofs_mount_info *am = v; 70 71 *mntflags = 0; 72 while ((ch = getopt(argc, argv, "f:o:O:p:")) != -1) 73 switch (ch) { 74 case 'f': 75 strlcpy(__UNCONST(am->from), optarg, MAXPATHLEN); 76 break; 77 case 'o': 78 getmntopts(optarg, mopts, mntflags, 0); 79 break; 80 case 'O': 81 strlcpy(__UNCONST(am->master_options), optarg, 82 MAXPATHLEN); 83 break; 84 case 'p': 85 strlcpy(__UNCONST(am->master_prefix), optarg, 86 MAXPATHLEN); 87 break; 88 case '?': 89 default: 90 usage(); 91 } 92 argc -= optind; 93 argv += optind; 94 95 if (argc != 2) 96 usage(); 97 98 strlcpy(canon_dev, argv[0], MAXPATHLEN); 99 if (realpath(argv[1], canon_dir) == NULL) /* Check mounton path */ 100 err(EXIT_FAILURE, "realpath %s", canon_dir); 101 if (strncmp(argv[1], canon_dir, MAXPATHLEN)) { 102 warnx("\"%s\" is a relative path.", argv[1]); 103 warnx("using \"%s\" instead.", canon_dir); 104 } 105 } 106 107 int 108 mount_autofs(int argc, char *argv[]) 109 { 110 char canon_dev[MAXPATHLEN], canon_dir[MAXPATHLEN]; 111 char from[MAXPATHLEN], master_options[MAXPATHLEN]; 112 char master_prefix[MAXPATHLEN]; 113 int mntflags, error; 114 struct vfsconf vfc; 115 struct autofs_mount_info am = { 116 .from = from, 117 .master_options = master_options, 118 .master_prefix = master_prefix, 119 }; 120 121 mount_autofs_parseargs(argc, argv, &am, &mntflags, 122 canon_dev, canon_dir); 123 124 error = getvfsbyname("autofs", &vfc); 125 if (error && vfsisloadable("autofs")) { 126 if(vfsload("autofs")) 127 err(EX_OSERR, "vfsload(%s)", "autofs"); 128 endvfsent(); 129 error = getvfsbyname("autofs", &vfc); 130 } 131 if (error) 132 errx(EX_OSERR, "%s filesystem not available", "autofs"); 133 134 if (mount(vfc.vfc_name, canon_dir, mntflags, &am) == -1) 135 err(EXIT_FAILURE, "autofs on %s", canon_dir); 136 137 return EXIT_SUCCESS; 138 } 139 140 static void 141 usage(void) 142 { 143 (void)fprintf(stderr, 144 "Usage: %s [-o options] [-O master_options] [-p master_prefix] " 145 "[-f <from>] autofs mount_point\n", getprogname()); 146 exit(EXIT_FAILURE); 147 } 148