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