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      1 /*	$NetBSD: mount_chfs.c,v 1.5 2021/07/16 12:09:36 andvar Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2010 Department of Software Engineering,
      5  *		      University of Szeged, Hungary
      6  * All rights reserved.
      7  *
      8  * This code is derived from software contributed to The NetBSD Foundation
      9  * by the Department of Software Engineering, University of Szeged, Hungary
     10  *
     11  * Redistribution and use in source and binary forms, with or without
     12  * modification, are permitted provided that the following conditions
     13  * are met:
     14  * 1. Redistributions of source code must retain the above copyright
     15  *    notice, this list of conditions and the following disclaimer.
     16  * 2. Redistributions in binary form must reproduce the above copyright
     17  *    notice, this list of conditions and the following disclaimer in the
     18  *    documentation and/or other materials provided with the distribution.
     19  *
     20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     21  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     22  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     23  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     24  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     25  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     26  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     27  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     28  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     30  * SUCH DAMAGE.
     31  */
     32 
     33 #include <sys/cdefs.h>
     34 #ifndef lint
     35 #endif /* not lint */
     36 
     37 #include <sys/param.h>
     38 #include <sys/mount.h>
     39 #include <sys/stat.h>
     40 #include <ufs/ufs/ufsmount.h>
     41 
     42 #include <ctype.h>
     43 #include <err.h>
     44 #include <errno.h>
     45 #include <grp.h>
     46 #include <mntopts.h>
     47 #include <pwd.h>
     48 #include <stdio.h>
     49 #include <stdlib.h>
     50 #include <string.h>
     51 #include <unistd.h>
     52 
     53 #include "mountprog.h"
     54 #include "mount_chfs.h"
     55 
     56 static const struct mntopt mopts[] = {
     57 	MOPT_STDOPTS,
     58 	MOPT_GETARGS,
     59 	MOPT_NULL,
     60 };
     61 
     62 /* --------------------------------------------------------------------- */
     63 
     64 static void usage(void) __dead;
     65 
     66 /* --------------------------------------------------------------------- */
     67 
     68 void
     69 mount_chfs_parseargs(int argc, char *argv[], struct ufs_args *args,
     70     int *mntflags, char *canon_dev, char *canon_dir)
     71 {
     72 	int ch;
     73 	mntoptparse_t mp;
     74 	struct stat sb;
     75 
     76 	/* Set default values for mount point arguments. */
     77 	memset(args, 0, sizeof(*args));
     78 	*mntflags = 0;
     79 
     80 	optind = optreset = 1;
     81 
     82 	while ((ch = getopt(argc, argv, "o:")) != -1) {
     83 		switch (ch) {
     84 		case 'o':
     85 			mp = getmntopts(optarg, mopts, mntflags, 0);
     86 			if (mp == NULL)
     87 				err(1, "getmntopts");
     88 			freemntopts(mp);
     89 			break;
     90 		case '?':
     91 		default:
     92 			usage();
     93 		}
     94 	}
     95 	argc -= optind;
     96 	argv += optind;
     97 
     98 	if (argc != 2)
     99 		usage();
    100 
    101 	pathadj(argv[0], canon_dev);
    102 	pathadj(argv[1], canon_dir);
    103 
    104 	args->fspec = canon_dev;
    105 
    106 	if (stat(canon_dir, &sb) == -1) {
    107 		err(EXIT_FAILURE, "cannot stat `%s'", canon_dir);
    108 	}
    109 
    110 }
    111 
    112 /* --------------------------------------------------------------------- */
    113 
    114 static void
    115 usage(void)
    116 {
    117 	(void)fprintf(stderr,
    118 	    "usage: %s special mountpath\n",
    119 	    getprogname());
    120 	exit(1);
    121 }
    122 
    123 /* --------------------------------------------------------------------- */
    124 
    125 int
    126 mount_chfs(int argc, char *argv[])
    127 {
    128 	struct ufs_args args;
    129 	char canon_dev[MAXPATHLEN], fs_name[MAXPATHLEN];
    130 	int mntflags;
    131 
    132 	mount_chfs_parseargs(argc, argv, &args, &mntflags,
    133 	    canon_dev, fs_name);
    134 
    135 	if (mount(MOUNT_CHFS, fs_name, mntflags, &args, sizeof args) == -1) {
    136 		err(EXIT_FAILURE, "chfs on %s", fs_name);
    137 	}
    138 
    139 	return EXIT_SUCCESS;
    140 }
    141 
    142 #ifndef MOUNT_NOMAIN
    143 int
    144 main(int argc, char *argv[])
    145 {
    146 	setprogname(argv[0]);
    147 	return mount_chfs(argc, argv);
    148 }
    149 #endif
    150