An attempt at getting image data back

spider-cam/libcamera/test/log/log_api.cpp

@@ -0,0 +1,154 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2019, Google Inc.
+ *
+ * log API test
+ */
+
+#include <algorithm>
+#include <fcntl.h>
+#include <iostream>
+#include <list>
+#include <sstream>
+#include <stdio.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <libcamera/base/log.h>
+
+#include <libcamera/logging.h>
+
+#include "test.h"
+
+using namespace std;
+using namespace libcamera;
+
+LOG_DEFINE_CATEGORY(LogAPITest)
+
+class LogAPITest : public Test
+{
+protected:
+	void doLogging()
+	{
+		logSetLevel("LogAPITest", "DEBUG");
+		LOG(LogAPITest, Info) << "good 1";
+
+		logSetLevel("LogAPITest", "WARN");
+		LOG(LogAPITest, Info) << "bad";
+
+		logSetLevel("LogAPITest", "ERROR");
+		LOG(LogAPITest, Error) << "good 3";
+		LOG(LogAPITest, Info) << "bad";
+
+		logSetLevel("LogAPITest", "WARN");
+		LOG(LogAPITest, Warning) << "good 5";
+		LOG(LogAPITest, Info) << "bad";
+	}
+
+	int verifyOutput(istream &is)
+	{
+		list<int> goodList = { 1, 3, 5 };
+		string line;
+		while (getline(is, line)) {
+			if (goodList.empty()) {
+				cout << "Too many log lines" << endl;
+				return TestFail;
+			}
+
+			unsigned int digit = line.back() - '0';
+			unsigned int expect = goodList.front();
+			goodList.pop_front();
+			if (digit != expect) {
+				cout << "Incorrect log line" << endl;
+				return TestFail;
+			}
+		}
+
+		if (!goodList.empty()) {
+			cout << "Too few log lines" << endl;
+			return TestFail;
+		}
+
+		return TestPass;
+	}
+
+	int testFile()
+	{
+		int fd = open("/tmp", O_TMPFILE | O_RDWR, S_IRUSR | S_IWUSR);
+		if (fd < 0) {
+			cerr << "Failed to open tmp log file" << endl;
+			return TestFail;
+		}
+
+		char path[32];
+		snprintf(path, sizeof(path), "/proc/self/fd/%u", fd);
+
+		if (logSetFile(path) < 0) {
+			cerr << "Failed to set log file" << endl;
+			close(fd);
+			return TestFail;
+		}
+
+		doLogging();
+
+		char buf[1000];
+		memset(buf, 0, sizeof(buf));
+		lseek(fd, 0, SEEK_SET);
+		if (read(fd, buf, sizeof(buf)) < 0) {
+			cerr << "Failed to read tmp log file" << endl;
+			close(fd);
+			return TestFail;
+		}
+		close(fd);
+
+		istringstream iss(buf);
+		return verifyOutput(iss);
+	}
+
+	int testStream()
+	{
+		stringstream log;
+		/* Never fails, so no need to check return value */
+		logSetStream(&log);
+
+		doLogging();
+
+		return verifyOutput(log);
+	}
+
+	int testTarget()
+	{
+		logSetTarget(LoggingTargetNone);
+		logSetLevel("LogAPITest", "DEBUG");
+		LOG(LogAPITest, Info) << "don't crash please";
+
+		if (!logSetTarget(LoggingTargetFile))
+			return TestFail;
+
+		if (!logSetTarget(LoggingTargetStream))
+			return TestFail;
+
+		return TestPass;
+	}
+
+	int run() override
+	{
+		int ret = testFile();
+		if (ret != TestPass)
+			return TestFail;
+
+		ret = testStream();
+		if (ret != TestPass)
+			return TestFail;
+
+		ret = testTarget();
+		if (ret != TestPass)
+			return TestFail;
+
+		return TestPass;
+	}
+};
+
+TEST_REGISTER(LogAPITest)

spider-cam/libcamera/test/log/log_process.cpp

@@ -0,0 +1,165 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2019, Google Inc.
+ *
+ * Logging in isolated child process test
+ */
+
+#include <fcntl.h>
+#include <iostream>
+#include <random>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <vector>
+
+#include <libcamera/logging.h>
+
+#include <libcamera/base/event_dispatcher.h>
+#include <libcamera/base/log.h>
+#include <libcamera/base/thread.h>
+#include <libcamera/base/timer.h>
+#include <libcamera/base/utils.h>
+
+#include "libcamera/internal/process.h"
+
+#include "test.h"
+
+using namespace libcamera;
+using namespace std;
+using namespace std::chrono_literals;
+
+static const string message("hello from the child");
+
+LOG_DEFINE_CATEGORY(LogProcessTest)
+
+class LogProcessTestChild
+{
+public:
+	int run(int status, int num)
+	{
+		usleep(50000);
+
+		string logPath = "/tmp/libcamera.worker.test." +
+				 to_string(num) + ".log";
+		if (logSetFile(logPath.c_str()) < 0)
+			return TestSkip;
+
+		LOG(LogProcessTest, Warning) << message;
+
+		return status;
+	}
+};
+
+class LogProcessTest : public Test
+{
+protected:
+	int init()
+	{
+		random_device random;
+		num_ = random();
+		logPath_ = "/tmp/libcamera.worker.test." +
+			   to_string(num_) + ".log";
+
+		proc_.finished.connect(this, &LogProcessTest::procFinished);
+		return 0;
+	}
+
+	int run()
+	{
+		EventDispatcher *dispatcher = Thread::current()->eventDispatcher();
+		Timer timeout;
+
+		int exitCode = 42;
+		vector<std::string> args;
+		args.push_back(to_string(exitCode));
+		args.push_back(to_string(num_));
+		int ret = proc_.start(self(), args);
+		if (ret) {
+			cerr << "failed to start process" << endl;
+			return TestFail;
+		}
+
+		timeout.start(2s);
+		while (timeout.isRunning())
+			dispatcher->processEvents();
+
+		if (exitStatus_ != Process::NormalExit) {
+			cerr << "process did not exit normally: " << exitStatus_
+			     << endl;
+			return TestFail;
+		}
+
+		if (exitCode_ == TestSkip)
+			return TestSkip;
+
+		if (exitCode_ != exitCode) {
+			cerr << "exit code should be " << exitCode
+			     << ", actual is " << exitCode_ << endl;
+			return TestFail;
+		}
+
+		int fd = open(logPath_.c_str(), O_RDONLY, S_IRUSR);
+		if (fd < 0) {
+			cerr << "failed to open tmp log file" << endl;
+			return TestFail;
+		}
+
+		char buf[200];
+		memset(buf, 0, sizeof(buf));
+		if (read(fd, buf, sizeof(buf)) < 0) {
+			cerr << "Failed to read tmp log file" << endl;
+			close(fd);
+			return TestFail;
+		}
+		close(fd);
+
+		string str(buf);
+		if (str.find(message) == string::npos) {
+			cerr << "Received message is not correct (received "
+			     << str.length() << " bytes)" << endl;
+			return TestFail;
+		}
+
+		return TestPass;
+	}
+
+	void cleanup()
+	{
+		unlink(logPath_.c_str());
+	}
+
+private:
+	void procFinished(enum Process::ExitStatus exitStatus, int exitCode)
+	{
+		exitStatus_ = exitStatus;
+		exitCode_ = exitCode;
+	}
+
+	ProcessManager processManager_;
+
+	Process proc_;
+	Process::ExitStatus exitStatus_ = Process::NotExited;
+	string logPath_;
+	int exitCode_;
+	int num_;
+};
+
+/*
+ * Can't use TEST_REGISTER() as single binary needs to act as both
+ * parent and child processes.
+ */
+int main(int argc, char **argv)
+{
+	if (argc == 3) {
+		int status = std::stoi(argv[1]);
+		int num = std::stoi(argv[2]);
+		LogProcessTestChild child;
+		return child.run(status, num);
+	}
+
+	LogProcessTest test;
+	test.setArgs(argc, argv);
+	return test.execute();
+}

spider-cam/libcamera/test/log/meson.build

@@ -0,0 +1,15 @@
+# SPDX-License-Identifier: CC0-1.0
+
+log_test = [
+    {'name': 'log_api', 'sources': ['log_api.cpp']},
+    {'name': 'log_process', 'sources': ['log_process.cpp']},
+]
+
+foreach test : log_test
+    exe = executable(test['name'], test['sources'],
+                     dependencies : libcamera_private,
+                     link_with : test_libraries,
+                     include_directories : test_includes_internal)
+
+    test(test['name'], exe, suite : 'log')
+endforeach