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/*
* Copyright (C) 2008 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <fcntl.h>
#include <errno.h>
#include "vold.h"
#include "ums.h"
#define DEBUG_UMS 0
static boolean host_connected = false;
static boolean ums_enabled = false;
int ums_bootstrap(void)
{
return 0;
}
void ums_enabled_set(boolean enabled)
{
ums_enabled = enabled;
send_msg(enabled ? VOLD_EVT_UMS_ENABLED : VOLD_EVT_UMS_DISABLED);
}
boolean ums_enabled_get()
{
return ums_enabled;
}
void ums_hostconnected_set(boolean connected)
{
#if DEBUG_UMS
LOG_VOL("ums_hostconnected_set(%d):", connected);
#endif
host_connected = connected;
if (!connected)
ums_enabled_set(false);
send_msg(connected ? VOLD_EVT_UMS_CONNECTED : VOLD_EVT_UMS_DISCONNECTED);
}
int ums_enable(char *dev_fspath, char *lun_syspath)
{
LOG_VOL("ums_enable(%s, %s):", dev_fspath, lun_syspath);
int fd;
char filename[255];
sprintf(filename, "/sys/%s/file", lun_syspath);
if ((fd = open(filename, O_WRONLY)) < 0) {
LOGE("Unable to open '%s' (%s)", filename, strerror(errno));
return -errno;
}
if (write(fd, dev_fspath, strlen(dev_fspath)) < 0) {
LOGE("Unable to write to ums lunfile (%s)", strerror(errno));
close(fd);
return -errno;
}
close(fd);
return 0;
}
int ums_disable(char *lun_syspath)
{
#if DEBUG_UMS
LOG_VOL("ums_disable(%s):", lun_syspath);
#endif
int fd;
char filename[255];
sprintf(filename, "/sys/%s/file", lun_syspath);
if ((fd = open(filename, O_WRONLY)) < 0) {
LOGE("Unable to open '%s' (%s)", filename, strerror(errno));
return -errno;
}
char ch = 0;
if (write(fd, &ch, 1) < 0) {
LOGE("Unable to write to ums lunfile (%s)", strerror(errno));
close(fd);
return -errno;
}
close(fd);
return 0;
}
boolean ums_hostconnected_get(void)
{
return host_connected;
}
int ums_send_status(void)
{
int rc;
#if DEBUG_UMS
LOG_VOL("ums_send_status():");
#endif
rc = send_msg(ums_enabled_get() ? VOLD_EVT_UMS_ENABLED :
VOLD_EVT_UMS_DISABLED);
if (rc < 0)
return rc;
rc = send_msg(ums_hostconnected_get() ? VOLD_EVT_UMS_CONNECTED :
VOLD_EVT_UMS_DISCONNECTED);
return rc;
}
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