118 lines
3.1 KiB
C
118 lines
3.1 KiB
C
/*
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** Copyright 2017, John Wu (@topjohnwu)
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** Copyright 2013, Koushik Dutta (@koush)
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**
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <limits.h>
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#include <sqlite3.h>
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#include <time.h>
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#include <string.h>
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#include <unistd.h>
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#include "magisk.h"
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#include "su.h"
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static int policy_callback(void *v, int argc, char **argv, char **azColName) {
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struct su_context *ctx = (struct su_context *) v;
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policy_t policy = QUERY;
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time_t until = 0;
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for (int i = 0; i < argc; i++) {
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if (strcmp(azColName[i], "policy") == 0)
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policy = atoi(argv[i]);
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else if (strcmp(azColName[i], "until") == 0)
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until = atol(argv[i]);
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}
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if (policy == DENY)
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ctx->info->policy = DENY;
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else if (policy == ALLOW && (until == 0 || until > time(NULL)))
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ctx->info->policy = ALLOW;
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LOGD("su_db: query policy=[%d]\n", ctx->info->policy);
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return 0;
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}
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static int settings_callback(void *v, int argc, char **argv, char **azColName) {
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struct su_context *ctx = (struct su_context *) v;
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int *target, value;
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char *entry;
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for (int i = 0; i < argc; ++i) {
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if (strcmp(azColName[i], "key") == 0) {
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if (strcmp(argv[i], ROOT_ACCESS_ENTRY) == 0)
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target = &ctx->info->root_access;
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else if (strcmp(argv[i], MULTIUSER_MODE_ENTRY) == 0)
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target = &ctx->info->multiuser_mode;
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else if (strcmp(argv[i], NAMESPACE_MODE_ENTRY) == 0)
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target = &ctx->info->mnt_ns;
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entry = argv[i];
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} else if (strcmp(azColName[i], "value") == 0) {
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value = atoi(argv[i]);
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}
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}
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LOGD("su_db: query %s=[%d]\n", entry, value);
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*target = value;
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return 0;
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}
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void database_check(struct su_context *ctx) {
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sqlite3 *db = NULL;
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int ret;
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char query[512], *err = NULL;
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// Set default values
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ctx->info->root_access = ROOT_ACCESS_APPS_AND_ADB;
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ctx->info->multiuser_mode = MULTIUSER_MODE_OWNER_ONLY;
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ctx->info->mnt_ns = NAMESPACE_MODE_REQUESTER;
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ctx->info->policy = QUERY;
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// Open database
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ret = sqlite3_open_v2(ctx->path.base_db, &db, SQLITE_OPEN_READONLY, NULL);
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if (ret) {
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LOGD("sqlite3 open failure: %s\n", sqlite3_errstr(ret));
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sqlite3_close(db);
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return;
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}
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// Check multiuser mode settings
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snprintf(query, sizeof(query), "SELECT key, value FROM settings WHERE key='%s'", MULTIUSER_MODE_ENTRY);
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sqlite3_exec(db, query, settings_callback, ctx, &err);
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err = NULL;
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if (ctx->info->uid / 100000 != 0 && ctx->info->multiuser_mode == MULTIUSER_MODE_USER) {
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sqlite3_close(db);
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// Open database
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ret = sqlite3_open_v2(ctx->path.multiuser_db, &db, SQLITE_OPEN_READONLY, NULL);
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if (ret) {
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LOGD("sqlite3 open failure: %s\n", sqlite3_errstr(ret));
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sqlite3_close(db);
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return;
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}
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}
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// Query for policy
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snprintf(query, sizeof(query), "SELECT policy, until FROM policies WHERE uid=%d", ctx->info->uid % 100000);
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sqlite3_exec(db, query, policy_callback, ctx, &err);
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if (err != NULL) {
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LOGE("sqlite3_exec: %s\n", err);
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return;
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}
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err = NULL;
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// Query for settings
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snprintf(query, sizeof(query), "SELECT key, value FROM settings WHERE key!='%s'", MULTIUSER_MODE_ENTRY);
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sqlite3_exec(db, query, settings_callback, ctx, &err);
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if (err != NULL) {
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LOGE("sqlite3_exec: %s\n", err);
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return;
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}
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sqlite3_close(db);
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}
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