1 /* $NetBSD: dev.c,v 1.3 2011/05/15 01:16:29 christos Exp $ */ 2 3 /* 4 * NetBSD specific device routines are added to this file. 5 */ 6 7 #include <sys/param.h> 8 #include <sys/types.h> 9 10 #include <sys/sysctl.h> 11 12 #include <dirent.h> 13 #include <stdio.h> 14 #include <string.h> 15 #include <stdlib.h> 16 #include <unistd.h> 17 #include <ctype.h> 18 #include <fcntl.h> 19 #include <limits.h> 20 21 #include "netbsd.h" 22 23 #define LVM_FAILURE -1 24 25 /* 26 * Find major numbers for char/block parts of all block devices. 27 * In NetBSD every block device has it's char counter part. 28 * Return success only for device drivers with defined char/block 29 * major numbers. 30 */ 31 int 32 nbsd_check_dev(int major, const char *path) 33 { 34 35 size_t val_len,i; 36 37 struct kinfo_drivers *kd; 38 39 /* XXX HACK */ 40 if (strcmp(path,"/dev/console") == 0) 41 return LVM_FAILURE; 42 43 /* get size kernel drivers array from kernel*/ 44 if (sysctlbyname("kern.drivers",NULL,&val_len,NULL,0) < 0) { 45 printf("sysctlbyname failed"); 46 return LVM_FAILURE; 47 } 48 49 if ((kd = malloc (val_len)) == NULL){ 50 printf("malloc kd info error\n"); 51 return LVM_FAILURE; 52 } 53 54 /* get array from kernel */ 55 if (sysctlbyname("kern.drivers", kd, &val_len, NULL, 0) < 0) { 56 printf("sysctlbyname failed kd"); 57 return LVM_FAILURE; 58 } 59 60 for (i = 0, val_len /= sizeof(*kd); i < val_len; i++) 61 /* We select only devices with correct char/block major number. */ 62 if (kd[i].d_cmajor != -1 && kd[i].d_bmajor != -1) { 63 64 if (kd[i].d_cmajor == major) 65 return 0; 66 } 67 68 return LVM_FAILURE; 69 } 70