ceamac
f9e68d48d9
First of a planned series of end-to-end -n/--network join tests
(tests/integration/test_network_join_scenarios.cpp, [integration][root][net]):
two containers joined to the same intern network ping each other by IP,
run once with a real veth pair and once forced onto the tap+relay
fallback, since the two are genuinely different implementations. IPv6 is
deliberately excluded pending a known device-specific peculiarity.
split_lines_trimmed()/extract_marked_lines() moved from
test_rootless_run.cpp into tests/support/fixtures.{h,cpp} for reuse here.
wait_for_eth0_then() wraps a sandboxed command's own network-touching
script in a poll for eth0 to exist first: join_networks() runs
concurrently with, not before, the sandboxed command starting, so a
near-instant command can otherwise exit before its own join finishes --
the exact limitation already documented in network_join.{h,cpp}'s own
CLAUDE.md entry. Confirmed by testing (not assumed): without this, the
container's own immediate ping-and-exit sometimes raced ahead of the
veth-move step, which then failed outright ("Invalid netns value")
against an already-exited pid.
109 lines
5.0 KiB
C++
109 lines
5.0 KiB
C++
// Copyright (C) 2026 Viorel Munteanu
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with this program; if not, write to the Free Software Foundation, Inc.,
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// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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#pragma once
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#include <filesystem>
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#include <optional>
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#include <string>
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#include <vector>
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#include "config_file.h"
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// The effective AppConfig for the current -t/--test run -- set once by
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// run_self_tests() (self_test.cpp) from whatever main() resolved (respecting
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// -c/--config-file, same as any other command), before Catch2 ever runs a
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// TEST_CASE. Test code that creates a real container (test_rootless_run.cpp's
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// own run_in_fixture()) reads this instead of hardcoding a fresh, default
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// AppConfig{}, so e.g. `-c <all-unshare-off.yaml> -t -- "[integration][net]"`
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// actually exercises what happens with pid/cgroup isolation disabled. Plain
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// default-constructed AppConfig{} otherwise (matching every test's prior,
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// unconditional behavior) -- a bare `-t` with no `-c` and no real config file
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// changes nothing.
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extern AppConfig g_test_app_config;
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// Path to a real, runnable OCI Image Layout tar (something with an actual
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// /bin/sh, unlike tests/gen_fixture.py's minimal single-file fixture used
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// by the plain mount/unmount smoke test) for [integration][net] tests that
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// need to actually run a command inside a container. Searches
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// images/busybox.tar relative to the current working directory -- this
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// project's own established manual-testing convention (see images/ at the
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// repo root, gitignored). nullopt if not found; callers should SKIP()
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// rather than fail, since fetching one is optional -- see
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// tests/setup-tests.py.
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std::optional<std::filesystem::path> find_busybox_fixture();
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// RAII scratch XDG_CONFIG_HOME/XDG_STATE_HOME: for its lifetime, both env
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// vars point at a fresh throwaway directory under /tmp, so
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// config_file_path()/xdg_state_dir() (config_file.cpp/pid_file.cpp)
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// resolve entirely under it instead of the real developer's own $HOME --
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// integration tests that actually mount/run something must never touch
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// real config/state. Restores whatever the two env vars were before (unset
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// if they were unset) and removes the scratch directory on destruction.
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class ScratchXdgDirs {
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public:
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ScratchXdgDirs();
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~ScratchXdgDirs();
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ScratchXdgDirs(const ScratchXdgDirs&) = delete;
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ScratchXdgDirs& operator=(const ScratchXdgDirs&) = delete;
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const std::filesystem::path& path() const { return path_; }
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private:
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std::filesystem::path path_;
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std::optional<std::string> previous_config_home_;
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std::optional<std::string> previous_state_home_;
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};
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// RAII stdout capture: for its lifetime, this process's own fd 1 (and
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// anything a forked/exec'd child -- e.g. the real bwrap-sandboxed command,
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// via dispatch_command()'s ordinary fork/exec chain -- inherits from it) is
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// redirected to a throwaway temp file instead of the real terminal/pipe.
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// contents() flushes C stdio first (so any of *this* process's own
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// buffered writes land in the file before being read back) and returns
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// everything captured so far; the destructor restores the original fd 1
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// and removes the temp file. Kept narrowly scoped around just the call
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// under test, so Catch2's own console reporter output is never captured
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// by mistake.
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class CapturedStdout {
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public:
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CapturedStdout();
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~CapturedStdout();
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CapturedStdout(const CapturedStdout&) = delete;
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CapturedStdout& operator=(const CapturedStdout&) = delete;
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std::string contents();
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private:
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int saved_fd_ = -1;
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std::filesystem::path temp_path_;
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};
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// Splits `text` into non-empty, trailing-whitespace-trimmed lines.
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std::vector<std::string> split_lines_trimmed(const std::string& text);
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// Extracts the lines strictly between a "BEGIN-TEST-OUTPUT"/"END-TEST-OUTPUT"
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// pair (each on its own line) -- empty if either marker is missing or out of
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// order. CapturedStdout also captures slocker-lite's *own* status/log output
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// (spdlog's default sink writes to stdout, not stderr) interleaved with
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// whatever the sandboxed command itself prints, since both land on the same
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// fd -- bracketing the sandboxed command's own real output between these two
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// unique markers and extracting only what's strictly between them is robust
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// regardless of whatever else slocker-lite itself prints, since in practice
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// all of that happens before the sandboxed command gets to run its own first
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// command at all.
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std::vector<std::string> extract_marked_lines(const std::string& text);
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