Magisk/db.c

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/*
** Copyright 2013, Koushik Dutta (@koush)
**
*/
#include <stdlib.h>
#include <stdio.h>
#include <limits.h>
#include <sqlite3.h>
#include <time.h>
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#include <string.h>
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#include "magisk.h"
#include "su.h"
struct callback_data_t {
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struct su_context *ctx;
policy_t policy;
};
static int database_callback(void *v, int argc, char **argv, char **azColName){
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struct callback_data_t *data = (struct callback_data_t *)v;
policy_t policy = INTERACTIVE;
int i;
time_t until = 0;
for(i = 0; i < argc; i++) {
if (strcmp(azColName[i], "policy") == 0) {
if (argv[i] != NULL) {
policy = atoi(argv[i]);
}
}
else if (strcmp(azColName[i], "until") == 0) {
if (argv[i] != NULL) {
until = atol(argv[i]);
}
}
}
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if (policy == DENY) {
data->policy = DENY;
return -1;
} else if (policy == ALLOW && (until == 0 || until > time(NULL))) {
data->policy = ALLOW;
// even though we allow, continue, so we can see if there's another policy
// that denies...
}
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return 0;
}
policy_t database_check(struct su_context *ctx) {
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sqlite3 *db = NULL;
char query[512];
snprintf(query, sizeof(query), "select policy, until from policies where uid=%d", ctx->from.uid);
int ret = sqlite3_open_v2(ctx->user.database_path, &db, SQLITE_OPEN_READONLY, NULL);
if (ret) {
LOGE("sqlite3 open failure: %d", ret);
sqlite3_close(db);
return INTERACTIVE;
}
char *err = NULL;
struct callback_data_t data;
data.ctx = ctx;
data.policy = INTERACTIVE;
ret = sqlite3_exec(db, query, database_callback, &data, &err);
sqlite3_close(db);
if (err != NULL) {
LOGE("sqlite3_exec: %s", err);
return DENY;
}
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return data.policy;
}