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#include <cstddef>
#include <cstdint>
#include <filesystem>
#include <fstream>
#include <iostream>
#include <vector>
/*
* this provides a way to run garbage data through the library also on platforms
* that do not have libFuzzer. data can be taken from a fuzzing session
* and feeding it to a program with this main function.
*/
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* Data, size_t Size);
void handle_file(std::filesystem::path file) {
std::vector<char> data;
const auto Nbytes = file_size(file);
data.resize(Nbytes);
std::ifstream filestream(file);
filestream.read(data.data(), data.size());
if (filestream.gcount() != Nbytes) {
std::cerr << "failed reading from file " << file << '\n';
return;
}
std::cout << "invoking fuzzer on data from file " << file << '\n';
LLVMFuzzerTestOneInput(reinterpret_cast<const uint8_t*>(data.data()),
data.size());
}
void handle_directory(std::filesystem::path directory) {
for (const auto& entry : std::filesystem::recursive_directory_iterator(
directory,
std::filesystem::directory_options::follow_directory_symlink)) {
if (entry.is_regular_file()) {
handle_file(entry.path());
} else if (entry.is_symlink()) {
auto resolved = read_symlink(entry);
if (is_regular_file(resolved)) {
handle_file(resolved);
}
}
}
}
void handle_possible_file(std::filesystem::path possible_file) {
if (std::filesystem::is_directory(possible_file)) {
handle_directory(possible_file);
} else if (is_regular_file(possible_file)) {
handle_file(possible_file);
} else if (is_symlink(possible_file)) {
auto resolved = read_symlink(possible_file);
handle_possible_file(resolved);
} else {
std::cerr << "not a directory, regular file or symlink: " << possible_file
<< '\n';
}
}
void handle_arg(const char* path) {
return handle_possible_file(std::filesystem::path(path));
}
int main(int argc, char* argv[]) {
for (int i = 1; i < argc; ++i) {
handle_arg(argv[i]);
}
}
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