Created
April 15, 2024 13:50
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SQLite: Results of queries containing null bytes may be incorrect
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#include <stdio.h> | |
#include <string.h> | |
#include <sqlite3.h> | |
void select(sqlite3 *db) { | |
const char *tail; | |
sqlite3_stmt *stmt; | |
char *query = "SELECT 'foo'||x'00'||'bar';"; | |
sqlite3_prepare_v2(db, query, strlen(query)-1, &stmt, &tail); | |
sqlite3_step(stmt); | |
char *result = (char *) sqlite3_column_text(stmt, 0); | |
for(size_t i = 0; i < sizeof(result)-1; i++) { | |
if (result[i] == '\0') { | |
fputs("\\0", stdout); | |
} | |
printf("%c", result[i]); | |
} | |
printf("\n"); | |
sqlite3_finalize(stmt); | |
} | |
void length(sqlite3 *db) { | |
const char *tail; | |
sqlite3_stmt *stmt; | |
char *query = "SELECT LENGTH('foo'||x'00'||'bar');"; | |
sqlite3_prepare_v2(db, query, strlen(query)-1, &stmt, &tail); | |
sqlite3_step(stmt); | |
char *result = (char *) sqlite3_column_text(stmt, 0); | |
printf("%s\n", result); | |
sqlite3_finalize(stmt); | |
} | |
int main() { | |
sqlite3* db; | |
sqlite3_open("sq", &db); | |
select(db); | |
length(db); | |
sqlite3_close(db); | |
return 0; | |
} |
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