1 /* 2 * Copyright (c) 2019 François Tigeot <ftigeot@wolfpond.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice unmodified, this list of conditions, and the following 10 * disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include <linux/types.h> 28 #include <linux/string.h> 29 #include <linux/init.h> 30 #include <linux/module.h> 31 #include <linux/ctype.h> 32 #include <linux/dmi.h> 33 #include <asm/unaligned.h> 34 35 bool 36 dmi_match(enum dmi_field f, const char *str) 37 { 38 const char *s = NULL; 39 40 switch (f) { 41 case DMI_NONE: 42 break; 43 case DMI_SYS_VENDOR: 44 s = kgetenv("smbios.system.maker"); 45 if (s != NULL && !strcmp(s, str)) 46 return true; 47 break; 48 case DMI_BOARD_VENDOR: 49 s = kgetenv("smbios.planar.maker"); 50 if (s != NULL && !strcmp(s, str)) 51 return true; 52 break; 53 case DMI_PRODUCT_NAME: 54 s = kgetenv("smbios.system.product"); 55 if (s != NULL && !strcmp(s, str)) 56 return true; 57 break; 58 case DMI_BOARD_NAME: 59 s = kgetenv("smbios.planar.product"); 60 if (s != NULL && !strcmp(s, str)) 61 return true; 62 break; 63 default: 64 return false; 65 } 66 67 return false; 68 } 69