src/dmi.c

   1 /*
   2  * Copyright (c) 2009 Vincent Bernat <bernat@luffy.cx>
   3  *
   4  * Permission to use, copy, modify, and/or distribute this software for any
   5  * purpose with or without fee is hereby granted, provided that the above
   6  * copyright notice and this permission notice appear in all copies.
   7  *
   8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
  10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
  11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
  13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  15  */
  16
  17 #define INCLUDE_LINUX_IF_H
  18 #include "lldpd.h"
  19 #include <unistd.h>
  20
  21 #ifdef ENABLE_LLDPMED
  22         /* Fill in inventory stuff:
  23             - hardware version: /sys/class/dmi/id/product_version
  24             - firmware version: /sys/class/dmi/id/bios_version
  25             - software version: `uname -r`
  26             - serial number: /sys/class/dmi/id/product_serial
  27             - manufacturer: /sys/class/dmi/id/sys_vendor
  28             - model: /sys/class/dmi/id/product_name
  29             - asset: /sys/class/dmi/id/chassis_asset_tag
  30         */
  31
  32 #if __i386__ || __amd64__
  33 char*
  34 dmi_get(char *file)
  35 {
  36         int dmi, s;
  37         char buffer[100];
  38
  39         if ((dmi = priv_open(file)) < 0) {
  40                 LLOG_DEBUG("cannot get DMI file %s", file);
  41                 return NULL;
  42         }
  43         memset(buffer, 0, sizeof(buffer));
  44         if ((s = read(dmi, buffer, sizeof(buffer))) == -1) {
  45                 LLOG_DEBUG("cannot read DMI file %s", file);
  46                 close(dmi);
  47                 return NULL;
  48         }
  49         close(dmi);
  50         buffer[sizeof(buffer) - 1] = '\0';
  51         if ((s > 0) && (buffer[s-1] == '\n'))
  52                 buffer[s-1] = '\0';
  53         if (strlen(buffer))
  54                 return strdup(buffer);
  55         return NULL;
  56 }
  57
  58 char*
  59 dmi_hw()
  60 {
  61         return dmi_get(SYSFS_CLASS_DMI "product_version");
  62 }
  63
  64 char*
  65 dmi_fw()
  66 {
  67         return dmi_get(SYSFS_CLASS_DMI "bios_version");
  68 }
  69
  70 char*
  71 dmi_sn()
  72 {
  73         return dmi_get(SYSFS_CLASS_DMI "product_serial");
  74 }
  75
  76 char*
  77 dmi_manuf()
  78 {
  79         return dmi_get(SYSFS_CLASS_DMI "sys_vendor");
  80 }
  81
  82 char*
  83 dmi_model()
  84 {
  85         return dmi_get(SYSFS_CLASS_DMI "product_name");
  86 }
  87
  88 char*
  89 dmi_asset()
  90 {
  91         return dmi_get(SYSFS_CLASS_DMI "chassis_asset_tag");
  92 }
  93 #endif
  94 #endif