Magisk/reboot/reboot.c

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/*
** Copyright 2013, Kevin Cernekee <cernekee@gmail.com>
**
** This was reverse engineered from an HTC "reboot" binary and is an attempt
** to remain bug-compatible with the original.
**
** 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 <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sqlite3.h>
#include <sys/reboot.h>
#include <android/log.h>
#define SETTINGS_DB "/data/data/com.android.providers.settings/databases/settings.db"
#define SCREEN_LOCK_STATUS "/data/misc/screen_lock_status"
int pattern_lock;
int sqlcallback(void *private, int n_columns, char **col_values, char **col_names)
{
pattern_lock = 0;
if (n_columns == 0 || !col_values[0])
return 0;
if (!strcmp(col_values[0], "1"))
pattern_lock = 1;
__android_log_print(ANDROID_LOG_INFO, NULL,
"sqlcallback %s = %s, pattern_locks= %d\n",
col_names[0], col_values[0], pattern_lock);
return 0;
}
int checkPatternLock(void)
{
sqlite3 *pDb = NULL;
char *errmsg = NULL;
if (sqlite3_open(SETTINGS_DB, &pDb) != 0) {
__android_log_print(ANDROID_LOG_ERROR, NULL,
"sqlite3_open error");
/* BUG? probably shouldn't call sqlite3_close() if open failed */
goto out;
}
if (sqlite3_exec(pDb,
"select value from system where name= \"lock_pattern_autolock\"",
sqlcallback, "checkPatternLock", &errmsg) != 0) {
__android_log_print(ANDROID_LOG_ERROR, NULL,
"SQL error: %s\n", errmsg);
sqlite3_free(errmsg);
goto out;
}
out:
sqlite3_close(pDb);
return 0;
}
int main(int argc, char **argv)
{
int no_sync = 0, power_off = 0;
int ret;
opterr = 0;
while ((ret = getopt(argc, argv, "np")) != -1) {
switch (ret) {
case 'n':
no_sync = 1;
break;
case 'p':
power_off = 1;
break;
case '?':
fprintf(stderr, "usage: %s [-n] [-p] [rebootcommand]\n",
argv[0]);
exit(1);
break;
}
}
if (argc > (optind + 1)) {
fprintf(stderr, "%s: too many arguments\n", argv[0]);
exit(1);
}
/* BUG: this should use optind */
if (argc > 1 && !strcmp(argv[1], "oem-78")) {
/* HTC RUU mode: "reboot oem-78" */
FILE *f;
char buf[5];
checkPatternLock();
f = fopen(SCREEN_LOCK_STATUS, "r");
if (!f) {
fputs("5\n", stderr);
exit(0);
}
fgets(buf, 5, f);
if (atoi(buf) == 1) {
if (pattern_lock != 0) {
fputs("1\n", stderr);
exit(0);
}
}
fputs("0\n", stderr);
}
if (!no_sync)
sync();
if (power_off) {
ret = __reboot(LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2,
LINUX_REBOOT_CMD_POWER_OFF, 0);
} else if (optind >= argc) {
ret = reboot(LINUX_REBOOT_CMD_RESTART);
} else {
ret = __reboot(LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2,
LINUX_REBOOT_CMD_RESTART2, argv[optind]);
}
if (ret < 0) {
perror("reboot");
exit(1);
} else {
fputs("reboot returned\n", stderr);
exit(0);
}
}