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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 <stdlib.h>
#include <string.h>
#include <dirent.h>
#include <errno.h>
#include <sys/types.h>
#include "vold.h"
#include "switch.h"
#define DEBUG_BOOTSTRAP 0
static int mmc_bootstrap_switch(char *sysfs_path);
int switch_bootstrap()
{
DIR *d;
struct dirent *de;
if (!(d = opendir(SYSFS_CLASS_SWITCH_PATH))) {
LOG_ERROR("Unable to open '%s' (%s)", SYSFS_CLASS_SWITCH_PATH,
strerror(errno));
return -errno;
}
while ((de = readdir(d))) {
char tmp[255];
if (de->d_name[0] == '.')
continue;
sprintf(tmp, "%s/%s", SYSFS_CLASS_SWITCH_PATH, de->d_name);
if (mmc_bootstrap_switch(tmp)) {
LOG_ERROR("Error bootstrapping switch '%s' (%s)", tmp,
strerror(errno));
}
}
closedir(d);
return 0;
}
static int mmc_bootstrap_switch(char *sysfs_path)
{
#if DEBUG_BOOTSTRAP
LOG_VOL("bootstrap_switch(%s):", sysfs_path);
#endif
char filename[255];
char name[255];
char state[255];
char tmp[255];
char *uevent_params[3];
char devpath[255];
FILE *fp;
/*
* Read switch name
*/
sprintf(filename, "%s/name", sysfs_path);
if (!(fp = fopen(filename, "r"))) {
LOGE("Error opening switch name path '%s' (%s)",
sysfs_path, strerror(errno));
return -errno;
}
if (!fgets(name, sizeof(name), fp)) {
LOGE("Unable to read switch name");
fclose(fp);
return -EIO;
}
fclose(fp);
name[strlen(name) -1] = '\0';
sprintf(devpath, "/devices/virtual/switch/%s", name);
sprintf(tmp, "SWITCH_NAME=%s", name);
uevent_params[0] = (char *) strdup(tmp);
/*
* Read switch state
*/
sprintf(filename, "%s/state", sysfs_path);
if (!(fp = fopen(filename, "r"))) {
LOGE("Error opening switch state path '%s' (%s)",
sysfs_path, strerror(errno));
return -errno;
}
if (!fgets(state, sizeof(state), fp)) {
LOGE("Unable to read switch state");
fclose(fp);
return -EIO;
}
fclose(fp);
state[strlen(state) -1] = '\0';
sprintf(tmp, "SWITCH_STATE=%s", state);
uevent_params[1] = (char *) strdup(tmp);
uevent_params[2] = (char *) NULL;
if (simulate_uevent("switch", devpath, "add", uevent_params) < 0) {
LOGE("Error simulating uevent (%s)", strerror(errno));
return -errno;
}
return 0;
}
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