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/*
* Copyright 2009 David Sommerseth <davids@redhat.com>
* Copyright 2002-2008 Jean Delvare <khali@linux-fr.org>
* Copyright 2000-2002 Alan Cox <alan@redhat.com>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* For the avoidance of doubt the "preferred form" of this code is one which
* is in an open unpatent encumbered format. Where cryptographic key signing
* forms part of the process of creating an executable the information
* including keys needed to generate an equivalently functional executable
* are deemed to be part of the source code.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "dmilog.h"
#include "efi.h"
/**
* @file xmlpythonizer.c
* @brief Helper function for EFI support
* @author Jean Delvare <khali@linux-fr.org>
* @author Alan Cox <alan@redhat.com>
*/
/**
* Probe for EFI interface
* @param size_t*
* @return returns EFI_NOT_FOUND or EFI_NO_SMBIOS
*/
int address_from_efi(Log_t *logp, size_t * address)
{
FILE *efi_systab;
const char *filename = NULL;
char linebuf[64];
int ret;
*address = 0; /* Prevent compiler warning */
/*
** Linux <= 2.6.6: /proc/efi/systab
** Linux >= 2.6.7: /sys/firmware/efi/systab
*/
if((efi_systab = fopen(filename = "/sys/firmware/efi/systab", "r")) == NULL
&& (efi_systab = fopen(filename = "/proc/efi/systab", "r")) == NULL) {
/* No EFI interface, fallback to memory scan */
return EFI_NOT_FOUND;
}
ret = EFI_NO_SMBIOS;
while((fgets(linebuf, sizeof(linebuf) - 1, efi_systab)) != NULL) {
char *addrp = strchr(linebuf, '=');
*(addrp++) = '\0';
if(strcmp(linebuf, "SMBIOS") == 0) {
*address = strtoul(addrp, NULL, 0);
ret = 0;
break;
}
}
if(fclose(efi_systab) != 0)
perror(filename);
if(ret == EFI_NO_SMBIOS) {
log_append(logp, LOGFL_NODUPS, LOG_WARNING, "%s: SMBIOS entry point missing\n", filename);
}
return ret;
}
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