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