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new(userspace/falco): add file name generator helper for capture

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Signed-off-by: Leonardo Grasso <me@leonardograsso.com>
This commit is contained in:
Leonardo Grasso 2025-07-18 13:09:01 +02:00 committed by poiana
parent 1da5514012
commit a818d48806
2 changed files with 42 additions and 2 deletions
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41
userspace/falco/app/actions/helpers.h
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@ -1,6 +1,6 @@
// SPDX-License-Identifier: Apache-2.0
/*
Copyright (C) 2023 The Falco Authors.
Copyright (C) 2025 The Falco Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
@ -20,6 +20,7 @@ limitations under the License.
#include "../state.h"
#include "../run_result.h"
#include <string>
#include <nlohmann/json.hpp>
namespace falco {
@ -34,6 +35,44 @@ void check_for_ignored_events(falco::app::state& s);
void format_plugin_info(std::shared_ptr<sinsp_plugin> p, std::ostream& os);
void format_described_rules_as_text(const nlohmann::json& v, std::ostream& os);
inline std::string generate_scap_file_path(const std::string& prefix,
uint64_t timestamp,
uint64_t evt_num) {
// File path in format: <prefix>_<timestamp>_<evt_num>.scap
// Example: "/tmp/falco_00000001234567890_00000000000000042.scap"
// Add underscore separator between prefix and timestamp
std::string path = prefix + "_";
// Zero-pad timestamp to 20 digits for proper lexicographic sorting
// Build digits from right to left in a buffer, then append to path
char digits[21]; // 20 digits + null terminator
digits[20] = '\0';
uint64_t t = timestamp;
for (int i = 19; i >= 0; --i) {
digits[i] = '0' + (t % 10);
t /= 10;
}
path += digits;
// Add underscore separator between timestamp and evt_num
path += "_";
// Zero-pad evt_num to 20 digits for proper lexicographic sorting
// Build digits from right to left in a buffer, then append to path
t = evt_num;
for (int i = 19; i >= 0; --i) {
digits[i] = '0' + (t % 10);
t /= 10;
}
path += digits;
// Add file extension
path += ".scap";
return path;
}
falco::app::run_result open_offline_inspector(falco::app::state& s);
falco::app::run_result open_live_inspector(falco::app::state& s,
std::shared_ptr<sinsp> inspector,

3
userspace/falco/app/actions/helpers_generic.cpp
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@ -1,6 +1,6 @@
// SPDX-License-Identifier: Apache-2.0
/*
Copyright (C) 2023 The Falco Authors.
Copyright (C) 2025 The Falco Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
@ -20,6 +20,7 @@ limitations under the License.
#include <libsinsp/plugin_manager.h>
#include <unordered_set>
#include <cstdint>
using namespace falco::app;
using namespace falco::app::actions;