Home | History | Annotate | Line # | Download | only in libutil
getdiskrawname.c revision 1.1 
      1 /*	$NetBSD: getdiskrawname.c,v 1.1 2012/04/07 16:44:39 christos Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2012 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Christos Zoulas.
      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  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 #include <sys/cdefs.h>
     32 __RCSID("$NetBSD: getdiskrawname.c,v 1.1 2012/04/07 16:44:39 christos Exp $");
     33 
     34 #include <sys/stat.h>
     35 
     36 #include <stdio.h>
     37 #include <string.h>
     38 #include <errno.h>
     39 #include <util.h>
     40 
     41 const char *
     42 getdiskrawname(char *buf, size_t bufsiz, const char *name)
     43 {
     44 	const char *dp = strrchr(name, '/');
     45 	struct stat st;
     46 
     47 	if (dp == NULL) {
     48 		errno = EINVAL;
     49 		return NULL;
     50 	}
     51 
     52 	if (stat(name, &st) == -1)
     53 		return NULL;
     54 
     55 	if (!S_ISBLK(st.st_mode)) {
     56 		errno = EFTYPE;
     57 		return NULL;
     58 	}
     59 
     60 	(void)snprintf(buf, bufsiz, "%.*s/r%s", (int)(dp - name), name, dp + 1);
     61 
     62 	return buf;
     63 }
     64 
     65 const char *
     66 getdiskcookedname(char *buf, size_t bufsiz, const char *name)
     67 {
     68 	const char *dp;
     69 	struct stat st;
     70 
     71 	if ((dp = strrchr(name, '/')) == NULL) {
     72 		errno = EINVAL;
     73 		return NULL;
     74 	}
     75 	if (stat(name, &st) == -1)
     76 		return NULL;
     77 
     78 	if (!S_ISCHR(st.st_mode)) {
     79 		errno = EFTYPE;
     80 		return NULL;
     81 	}
     82 	if (dp[1] != 'r') {
     83 		errno = EINVAL;
     84 		return NULL;
     85 	}
     86 	(void)snprintf(buf, bufsiz, "%.*s/%s", (int)(dp - name), name, dp + 2);
     87 
     88 	return buf;
     89 }
     90