Add --log-file command line parameter

src/log.cpp

@@ -132,7 +132,7 @@ public:
 
 		std::setlocale(LC_ALL, "en_001");
 
-		m_logFilePath = DATA_DIR + log_file_name;
+		m_logFilePath = LOG_FILE_PATH.empty() ? (DATA_DIR + log_file_name) : LOG_FILE_PATH;
 
 		m_buf.resize(BUF_SIZE);
 

src/main.cpp

@@ -72,6 +72,7 @@ void p2pool_usage()
 		"--light-mode          Don't allocate RandomX dataset, saves 2GB of RAM\n"
 		"--loglevel            Verbosity of the log, integer number between 0 and %d\n"
 		"--data-dir            Path to store general p2pool files (log, cache, peer data, etc.), default is current directory\n"
+		"--log-file            Path to the log file, default is \"p2pool.log\" in p2pool's working directory\n"
 		"--sidechain-config    Name of the p2pool sidechain parameters file (only use it if you run your own sidechain)\n"
 		"--data-api            Path to the p2pool JSON data (use it in tandem with an external web-server). Not affected by --data-dir setting!\n"
 		"--local-api           Enable /local/ path in api path for Stratum Server and built-in miner statistics\n"
@@ -290,6 +291,10 @@ int main(int argc, char* argv[])
 			p2pool::fixup_path(p2pool::DATA_DIR);
 		}
 
+		if ((strcmp(argv[i], "--log-file") == 0) && (i + 1 < argc)) {
+			p2pool::LOG_FILE_PATH = argv[++i];
+		}
+
 		if ((strcmp(argv[i], "--params-file") == 0) && (i + 1 < argc)) {
 			params_file = argv[++i];
 		}

src/params.cpp

@@ -130,6 +130,11 @@ Params::Params(const std::vector<std::vector<std::string>>& args)
 			ok = true;
 		}
 
+		if ((arg[0] == "log-file") && has1(arg)) {
+			// Processed in main.cpp
+			ok = true;
+		}
+
 		if ((arg[0] == "sidechain-config") && has1(arg)) {
 			m_sidechainConfig = arg[1];
 			ok = true;

src/util.cpp

@@ -161,6 +161,7 @@ secure_zero_memory(volatile void* data, size_t size)
 const uint8_t ED25519_MASTER_PUBLIC_KEY[32] = {51,175,37,73,203,241,188,115,195,255,123,53,218,120,90,74,186,240,82,178,67,139,124,91,180,106,188,181,187,51,236,10};
 
 std::string DATA_DIR;
+std::string LOG_FILE_PATH;
 
 SoftwareID get_software_id(uint32_t value)
 {

src/util.h

@@ -45,6 +45,7 @@ extern const char* VERSION;
 extern const uint8_t ED25519_MASTER_PUBLIC_KEY[32];
 
 extern std::string DATA_DIR;
+extern std::string LOG_FILE_PATH;
 
 enum class SoftwareID : uint32_t {
 	P2Pool = 0,