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vnconfig.c revision 1.8 
      1 /*	$NetBSD: vnconfig.c,v 1.8 1995/12/30 18:14:03 thorpej Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1993 University of Utah.
      5  * Copyright (c) 1990, 1993
      6  *	The Regents of the University of California.  All rights reserved.
      7  *
      8  * This code is derived from software contributed to Berkeley by
      9  * the Systems Programming Group of the University of Utah Computer
     10  * Science Department.
     11  *
     12  * Redistribution and use in source and binary forms, with or without
     13  * modification, are permitted provided that the following conditions
     14  * are met:
     15  * 1. Redistributions of source code must retain the above copyright
     16  *    notice, this list of conditions and the following disclaimer.
     17  * 2. Redistributions in binary form must reproduce the above copyright
     18  *    notice, this list of conditions and the following disclaimer in the
     19  *    documentation and/or other materials provided with the distribution.
     20  * 3. All advertising materials mentioning features or use of this software
     21  *    must display the following acknowledgement:
     22  *	This product includes software developed by the University of
     23  *	California, Berkeley and its contributors.
     24  * 4. Neither the name of the University nor the names of its contributors
     25  *    may be used to endorse or promote products derived from this software
     26  *    without specific prior written permission.
     27  *
     28  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     29  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     30  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     31  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     32  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     33  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     34  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     35  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     36  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     37  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     38  * SUCH DAMAGE.
     39  *
     40  * from: Utah $Hdr: vnconfig.c 1.1 93/12/15$
     41  *
     42  *	@(#)vnconfig.c	8.1 (Berkeley) 12/15/93
     43  */
     44 
     45 #include <sys/param.h>
     46 #include <sys/ioctl.h>
     47 #include <sys/mount.h>
     48 #include <sys/stat.h>
     49 
     50 #include <dev/vndioctl.h>
     51 
     52 #include <err.h>
     53 #include <errno.h>
     54 #include <stdio.h>
     55 #include <stdlib.h>
     56 #include <string.h>
     57 
     58 #define VND_CONFIG	1
     59 #define VND_UNCONFIG	2
     60 
     61 int verbose = 0;
     62 
     63 char *rawdevice __P((char *));
     64 void usage __P((void));
     65 
     66 main(argc, argv)
     67 	int argc;
     68 	char **argv;
     69 {
     70 	int ch, rv, action = VND_CONFIG;
     71 
     72 	while ((ch = getopt(argc, argv, "cuv")) != -1) {
     73 		switch (ch) {
     74 		case 'c':
     75 			action = VND_CONFIG;
     76 			break;
     77 		case 'u':
     78 			action = VND_UNCONFIG;
     79 			break;
     80 		case 'v':
     81 			verbose = 1;
     82 			break;
     83 		default:
     84 		case '?':
     85 			usage();
     86 			/* NOTREACHED */
     87 		}
     88 	}
     89 	argc -= optind;
     90 	argv += optind;
     91 
     92 	if (action == VND_CONFIG && argc == 2)
     93 		rv = config(argv[0], argv[1], action);
     94 	else if (action == VND_UNCONFIG && argc == 1)
     95 		rv = config(argv[0], NULL, action);
     96 	else
     97 		usage();
     98 	exit(rv);
     99 }
    100 
    101 config(dev, file, action)
    102 	char *dev;
    103 	char *file;
    104 	int action;
    105 {
    106 	struct vnd_ioctl vndio;
    107 	FILE *f;
    108 	char *rdev;
    109 	int rv;
    110 
    111 	rdev = rawdevice(dev);
    112 	f = fopen(rdev, "rw");
    113 	if (f == NULL) {
    114 		warn(rdev);
    115 		return (1);
    116 	}
    117 	vndio.vnd_file = file;
    118 
    119 	/*
    120 	 * Clear (un-configure) the device
    121 	 */
    122 	if (action == VND_UNCONFIG) {
    123 		rv = ioctl(fileno(f), VNDIOCCLR, &vndio);
    124 		if (rv)
    125 			warn("VNDIOCCLR");
    126 		else if (verbose)
    127 			printf("%s: cleared\n", dev);
    128 	}
    129 	/*
    130 	 * Configure the device
    131 	 */
    132 	if (action == VND_CONFIG) {
    133 		rv = ioctl(fileno(f), VNDIOCSET, &vndio);
    134 		if (rv)
    135 			warn("VNDIOCSET");
    136 		else if (verbose)
    137 			printf("%s: %d bytes on %s\n", dev, vndio.vnd_size,
    138 			    file);
    139 	}
    140 done:
    141 	fclose(f);
    142 	fflush(stdout);
    143 	return (rv < 0);
    144 }
    145 
    146 char *
    147 rawdevice(dev)
    148 	char *dev;
    149 {
    150 	register char *rawbuf, *dp, *ep;
    151 	struct stat sb;
    152 	int len;
    153 
    154 	len = strlen(dev);
    155 	rawbuf = malloc(len + 2);
    156 	strcpy(rawbuf, dev);
    157 	if (stat(rawbuf, &sb) != 0 || !S_ISCHR(sb.st_mode)) {
    158 		dp = rindex(rawbuf, '/');
    159 		if (dp) {
    160 			for (ep = &rawbuf[len]; ep > dp; --ep)
    161 				*(ep+1) = *ep;
    162 			*++ep = 'r';
    163 		}
    164 	}
    165 	return (rawbuf);
    166 }
    167 
    168 void
    169 usage()
    170 {
    171 
    172 	(void)fprintf(stderr, "%s%s",
    173 	    "usage: vnconfig -c [-v] special-file regular-file\n",
    174 	    "       vnconfig -u [-v] special-file\n");
    175 	exit(1);
    176 }
    177