Further work on supporting multiple instances

* On stderr, the service name is printed on each line.
* Print the name of the eeprom file, the log file and
the log pipe on startup.

Hopefully, this will help people notice when they are
running multiple instances, and to distinguish between
them.

configure

@@ -347,8 +347,9 @@ for opt do
         BINDIR="$optarg"
         ;;
     --service-name=*)
-		SERVICE_NAME="$optarg"
-		;;
+        SERVICE_NAME="$optarg"
+        CPPFLAGS="-DMY_SERVICE_NAME=\"${optarg}\" $CPPFLAGS"
+        ;;
     --no-clean*)
         NO_CLEAN="1"
         ;;

hal/architecture/Linux/MyHwLinuxGeneric.cpp

@@ -38,6 +38,8 @@ bool hwInit(void)
 		exit(1);
 	}
 
+	logInfo("Using eeprom file %s\n", conf.eeprom_file);
+
 	return true;
 }
 

hal/architecture/Linux/drivers/core/EthernetServer.cpp

@@ -90,7 +90,7 @@ void EthernetServer::begin(IPAddress address)
 	}
 
 	if (p == NULL)  {
-		logError("Failed to bind!\n");
+		logError("Failed to bind to port %d! Is another instance running?\n", port);
 		freeaddrinfo(servinfo);
 		return;
 	}

hal/architecture/Linux/drivers/core/config.c

@@ -25,7 +25,9 @@
 #include <string.h>
 #include <unistd.h>
 #include <sys/stat.h>
+#include <sys/file.h>
 #include "log.h"
+#include <errno.h>
 
 static int _config_create(const char *config_file);
 static int _config_parse_int(char *token, const char *name, int *value);
@@ -36,6 +38,7 @@ int config_parse(const char *config_file)
 	FILE *fptr;
 	char buf[1024];
 	struct stat fileInfo;
+	logInfo("Using config file %s\n", config_file);
 
 	if (stat(config_file, &fileInfo) != 0) {
 		//File does not exist.  Create it.
@@ -45,7 +48,7 @@ int config_parse(const char *config_file)
 
 	fptr = fopen(config_file, "rt");
 	if (!fptr) {
-		logError("Error opening config file \"%s\".\n", config_file);
+		logError("Error opening config file \"%s\": %s\n", config_file, strerror(errno));
 		return -1;
 	}
 
@@ -260,7 +263,7 @@ int _config_create(const char *config_file)
 
 	myFile = fopen(config_file, "w");
 	if (!myFile) {
-		logError("Unable to create config file %s.\n", config_file);
+		logError("Unable to create config file %s: %s\n", config_file, strerror(errno));
 		return -1;
 	}
 	ret = fputs(default_conf, myFile);

hal/architecture/Linux/drivers/core/log.c

@@ -28,6 +28,13 @@
 #include <time.h>
 #include <errno.h>
 
+#ifndef MY_SERVICE_NAME
+#define MY_SERVICE_NAME "mysgw"
+#endif
+
+#define STR_HELPER(x) #x //!< Helper macro, STR_HELPER()
+#define STR(x) STR_HELPER(x) //!< Helper macro, STR()
+
 static const char *_log_level_colors[] = {
 	"\x1b[1;5;91m", "\x1b[1;91m", "\x1b[91m", "\x1b[31m", "\x1b[33m", "\x1b[34m", "\x1b[32m", "\x1b[36m"
 };
@@ -80,6 +87,7 @@ int logSetPipe(char *pipe_file)
 		_log_pipe = 1;
 	}
 
+	logInfo("Using log pipe %s\n", _log_pipe_file);
 	return ret;
 }
 
@@ -94,6 +102,7 @@ int logSetFile(char *file)
 		return errno;
 	}
 
+	logInfo("Using log file %s\n", file);
 	return 0;
 }
 
@@ -138,18 +147,18 @@ void vlog(int level, const char *fmt, va_list args)
 		date[strftime(date, sizeof(date), "%b %d %H:%M:%S", lt)] = '\0';
 
 		if (_log_file_fp != NULL) {
-			fprintf(_log_file_fp, "%s %-5s ", date, _log_level_names[level]);
+			fprintf(_log_file_fp, "%s %s %-5s ", date, STR(MY_SERVICE_NAME), _log_level_names[level]);
 			vfprintf(_log_file_fp, fmt, args);
 			fflush(_log_file_fp);
 		}
 
 		if (!_log_quiet) {
 #ifdef LOG_DISABLE_COLOR
 			(void)_log_level_colors;
-			fprintf(stderr, "%s %-5s ", date, _log_level_names[level]);
+			fprintf(stderr, "%s %s %-5s ", date, STR(MY_SERVICE_NAME) _log_level_names[level]);
 			vfprintf(stderr, fmt, args);
 #else
-			fprintf(stderr, "%s %s%-5s\x1b[0m ", date, _log_level_colors[level], _log_level_names[level]);
+			fprintf(stderr, "%s %s %s%-5s\x1b[0m ", date, STR(MY_SERVICE_NAME), _log_level_colors[level], _log_level_names[level]);
 			vfprintf(stderr, fmt, args);
 #endif
 		}