libvirt/src/util/virtpm.c

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/*
* virtpm.c: TPM support
*
* Copyright (C) 2013 IBM Corporation
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*
* Author: Stefan Berger <stefanb@linux.vnet.ibm.com>
*/
#include <config.h>
#include <sys/stat.h>
#include "virstring.h"
#include "virerror.h"
#include "virtpm.h"
#define VIR_FROM_THIS VIR_FROM_NONE
/**
* virTPMCreateCancelPath:
* @devpath: Path to the TPM device
*
* Create the cancel path given the path to the TPM device
*/
char *
virTPMCreateCancelPath(const char *devpath)
{
char *path = NULL;
const char *dev;
if (devpath) {
dev = strrchr(devpath, '/');
if (dev) {
dev++;
if (virAsprintf(&path, "/sys/class/misc/%s/device/cancel",
dev) < 0)
goto cleanup;
} else {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("TPM device path %s is invalid"), devpath);
}
} else {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Missing TPM device path"));
}
cleanup:
return path;
}