src/daemon/dmi.c

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