1 /* $OpenBSD: duid.c,v 1.2 2012/07/09 14:26:40 nicm Exp $ */ 2 3 /* 4 * Copyright (c) 2010 Joel Sing <jsing@openbsd.org> 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 19 #include <string.h> 20 21 #include "util.h" 22 23 int 24 isduid(const char *duid, int dflags) 25 { 26 char c; 27 int i; 28 29 /* Basic format check. */ 30 if (!((strlen(duid) == 16 && (dflags & OPENDEV_PART)) || 31 (strlen(duid) == 18 && duid[16] == '.'))) 32 return 0; 33 34 /* Check UID. */ 35 for (i = 0; i < 16; i++) { 36 c = duid[i]; 37 if ((c < '0' || c > '9') && (c < 'a' || c > 'f')) 38 return 0; 39 } 40 41 return 1; 42 } 43