10Sstevel@tonic-gate /* 20Sstevel@tonic-gate * CDDL HEADER START 30Sstevel@tonic-gate * 40Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*2805Seota * Common Development and Distribution License (the "License"). 6*2805Seota * You may not use this file except in compliance with the License. 70Sstevel@tonic-gate * 80Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 90Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 100Sstevel@tonic-gate * See the License for the specific language governing permissions 110Sstevel@tonic-gate * and limitations under the License. 120Sstevel@tonic-gate * 130Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 140Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 150Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 160Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 170Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 180Sstevel@tonic-gate * 190Sstevel@tonic-gate * CDDL HEADER END 200Sstevel@tonic-gate */ 210Sstevel@tonic-gate /* 22*2805Seota * Copyright 2006 Sun Microsystems, Inc. All rights reserved. 230Sstevel@tonic-gate * Use is subject to license terms. 240Sstevel@tonic-gate */ 250Sstevel@tonic-gate 260Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI" 270Sstevel@tonic-gate 280Sstevel@tonic-gate #include <stdio.h> 290Sstevel@tonic-gate #include <stdlib.h> 30*2805Seota #include <ctype.h> 310Sstevel@tonic-gate #include <string.h> 320Sstevel@tonic-gate #include <limits.h> 330Sstevel@tonic-gate #include <sys/types.h> 340Sstevel@tonic-gate #include <svm.h> 350Sstevel@tonic-gate 360Sstevel@tonic-gate /* 370Sstevel@tonic-gate * Macros to produce a quoted string containing the value of a 380Sstevel@tonic-gate * preprocessor macro. For example, if SIZE is defined to be 256, 390Sstevel@tonic-gate * VAL2STR(SIZE) is "256". This is used to construct format 400Sstevel@tonic-gate * strings for scanf-family functions below. 410Sstevel@tonic-gate */ 420Sstevel@tonic-gate #define QUOTE(x) #x 430Sstevel@tonic-gate #define VAL2STR(x) QUOTE(x) 440Sstevel@tonic-gate 45*2805Seota static int is_blank(char *); 46*2805Seota 47*2805Seota /* 48*2805Seota * is_blank() returns 1 (true) if a line specified is composed of 49*2805Seota * whitespace characters only. otherwise, it returns 0 (false). 50*2805Seota * 51*2805Seota * Note. the argument (line) must be null-terminated. 52*2805Seota */ 53*2805Seota static int 54*2805Seota is_blank(char *line) 55*2805Seota { 56*2805Seota for (/* nothing */; *line != '\0'; line++) 57*2805Seota if (!isspace(*line)) 58*2805Seota return (0); 59*2805Seota return (1); 60*2805Seota } 61*2805Seota 620Sstevel@tonic-gate /* 630Sstevel@tonic-gate * FUNCTION: 640Sstevel@tonic-gate * Return the driver name for a major number 650Sstevel@tonic-gate * 660Sstevel@tonic-gate * INPUT: major number, mount point for name_to_major file, pointer 670Sstevel@tonic-gate * to a valid buffer. 680Sstevel@tonic-gate * 690Sstevel@tonic-gate * RETURN VALUES: 700Sstevel@tonic-gate * 0 - SUCCESS - buf contain the driver name. 710Sstevel@tonic-gate * -1 - FAIL 720Sstevel@tonic-gate * 730Sstevel@tonic-gate */ 740Sstevel@tonic-gate 750Sstevel@tonic-gate int 760Sstevel@tonic-gate get_drv_name(major_t major, char *mnt, char *buf) 770Sstevel@tonic-gate { 780Sstevel@tonic-gate FILE *fp; 790Sstevel@tonic-gate char drv[FILENAME_MAX + 1]; 800Sstevel@tonic-gate char entry[FILENAME_MAX + 1]; 81*2805Seota char line[MAX_N2M_ALIAS_LINE], *cp; 820Sstevel@tonic-gate char fname[PATH_MAX]; 830Sstevel@tonic-gate 840Sstevel@tonic-gate int status = RET_NOERROR; 850Sstevel@tonic-gate (void) snprintf(fname, sizeof (fname), "%s%s", mnt, NAME_TO_MAJOR); 860Sstevel@tonic-gate 870Sstevel@tonic-gate if ((fp = fopen(fname, "r")) == NULL) { 880Sstevel@tonic-gate return (RET_ERROR); 890Sstevel@tonic-gate } 900Sstevel@tonic-gate 910Sstevel@tonic-gate while ((fgets(line, sizeof (line), fp) != NULL) && 920Sstevel@tonic-gate status == RET_NOERROR) { 93*2805Seota /* cut off comments starting with '#' */ 94*2805Seota if ((cp = strchr(line, '#')) != NULL) 95*2805Seota *cp = '\0'; 96*2805Seota /* ignore comment or blank lines */ 97*2805Seota if (is_blank(line)) 98*2805Seota continue; 99*2805Seota /* sanity-check */ 1000Sstevel@tonic-gate if (sscanf(line, 1010Sstevel@tonic-gate "%" VAL2STR(FILENAME_MAX) "s %" VAL2STR(FILENAME_MAX) "s", 1020Sstevel@tonic-gate drv, entry) != 2) { 1030Sstevel@tonic-gate status = RET_ERROR; 1040Sstevel@tonic-gate } 1050Sstevel@tonic-gate if (atoi(entry) == major) 1060Sstevel@tonic-gate break; 1070Sstevel@tonic-gate } 1080Sstevel@tonic-gate 1090Sstevel@tonic-gate if (status == RET_NOERROR) 1100Sstevel@tonic-gate (void) strcpy(buf, drv); 1110Sstevel@tonic-gate (void) fclose(fp); 1120Sstevel@tonic-gate return (status); 1130Sstevel@tonic-gate } 114