122 lines
2.9 KiB
C
122 lines
2.9 KiB
C
|
|
||
|
|
/*
|
||
|
|
* 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' (%m)", SYSFS_CLASS_SWITCH_PATH);
|
||
|
|
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' (%m)", tmp);
|
||
|
|
}
|
||
|
|
|
||
|
|
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;
|
||
|
|
}
|