1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2003 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 #include <stdio.h> 30 #include <stdlib.h> 31 #include <string.h> 32 #include <limits.h> 33 #include <sys/types.h> 34 #include <svm.h> 35 36 /* 37 * Macros to produce a quoted string containing the value of a 38 * preprocessor macro. For example, if SIZE is defined to be 256, 39 * VAL2STR(SIZE) is "256". This is used to construct format 40 * strings for scanf-family functions below. 41 */ 42 #define QUOTE(x) #x 43 #define VAL2STR(x) QUOTE(x) 44 45 /* 46 * FUNCTION: 47 * Return the driver name for a major number 48 * 49 * INPUT: major number, mount point for name_to_major file, pointer 50 * to a valid buffer. 51 * 52 * RETURN VALUES: 53 * 0 - SUCCESS - buf contain the driver name. 54 * -1 - FAIL 55 * 56 */ 57 58 int 59 get_drv_name(major_t major, char *mnt, char *buf) 60 { 61 FILE *fp; 62 char drv[FILENAME_MAX + 1]; 63 char entry[FILENAME_MAX + 1]; 64 char line[MAX_N2M_ALIAS_LINE]; 65 char fname[PATH_MAX]; 66 67 int status = RET_NOERROR; 68 (void) snprintf(fname, sizeof (fname), "%s%s", mnt, NAME_TO_MAJOR); 69 70 if ((fp = fopen(fname, "r")) == NULL) { 71 return (RET_ERROR); 72 } 73 74 while ((fgets(line, sizeof (line), fp) != NULL) && 75 status == RET_NOERROR) { 76 if (sscanf(line, 77 "%" VAL2STR(FILENAME_MAX) "s %" VAL2STR(FILENAME_MAX) "s", 78 drv, entry) != 2) { 79 status = RET_ERROR; 80 } 81 if (atoi(entry) == major) 82 break; 83 84 } 85 86 if (status == RET_NOERROR) 87 (void) strcpy(buf, drv); 88 (void) fclose(fp); 89 return (status); 90 } 91