Added support for specifying in which dir to store the meterfiles (ie not just /tmp).

README.md

@@ -16,8 +16,9 @@ Add --verbose for detailed debug information.
     --robot or --robot=json for json output.
     --robot=fields for semicolon separated fields.
     --separator=X change field separator to X.
-    --meterfiles to create status files below tmp,
-          named /tmp/meter_name, containing the latest reading.
+    --meterfiles=dir to create status files below dir,
+          named dir/meter_name, containing the latest reading.
+    --meterfiles defaults dir to /tmp.
     --oneshot wait for an update from each meter, then quit.
 
 Specifying auto as the device will automatically look for usb

cmdline.cc

@@ -88,8 +88,20 @@ CommandLine *parseCommandLine(int argc, char **argv) {
             i++;
             continue;
         }
-        if (!strcmp(argv[i], "--meterfiles")) {
+        if (!strncmp(argv[i], "--meterfiles", 12)) {
             c->meterfiles = true;
+            if (strlen(argv[i]) > 12 && argv[i][12] == '=') {
+                size_t len = strlen(argv[i])-13;
+                if (len > 0) {
+                    c->meterfiles_dir = new char[len+1];
+                    strncpy((char*)c->meterfiles_dir, argv[i]+13, len);
+                } else {
+                    c->meterfiles_dir = "/tmp";
+                }
+            } else {
+                c->meterfiles_dir = "/tmp";
+            }
+            verbose("Storing meter files here: %s\n", c->meterfiles_dir);
             i++;
             continue;
         }

cmdline.h

@@ -49,6 +49,7 @@ struct CommandLine {
     bool debug {};
     bool logtelegrams {};
     bool meterfiles {};
+    const char *meterfiles_dir {};
     bool json {};
     bool fields {};
     char separator { ';' };

main.cc

@@ -43,8 +43,9 @@ int main(int argc, char **argv)
         printf("    --robot or --robot=json for json output.\n");
         printf("    --robot=fields for semicolon separated fields.\n");
         printf("    --separator=X change field separator to X.\n");
-	printf("    --meterfiles to create status files below tmp,\n"
-	       "       named /tmp/meter_name, containing the latest reading.\n");
+	printf("    --meterfiles=dir to create status files below dir,\n"
+	       "       named dir/meter_name, containing the latest reading.\n");
+	printf("    --meterfiles defaults dir to /tmp.\n");
 	printf("    --oneshot wait for an update from each meter, then quit.\n\n");
         printf("Specifying auto as the device will automatically look for usb\n");
         printf("wmbus dongles on /dev/im871a and /dev/amb8465\n\n");
@@ -90,7 +91,7 @@ int main(int argc, char **argv)
     if (wmbus->getLinkMode()!=LinkModeC1) error("Could not set link mode to receive C1 telegrams.\n");
 
     Printer *output = new Printer(cmdline->json, cmdline->fields,
-                                  cmdline->separator, cmdline->meterfiles);
+                                  cmdline->separator, cmdline->meterfiles, cmdline->meterfiles_dir);
 
     if (cmdline->meters.size() > 0) {
         for (auto &m : cmdline->meters) {

printer.cc

@@ -22,12 +22,13 @@
 
 using namespace std;
 
-Printer::Printer(bool json, bool fields, char separator, bool meterfiles)
+Printer::Printer(bool json, bool fields, char separator, bool meterfiles, const char *meterfiles_dir)
 {
     json_ = json;
     fields_ = fields;
     separator_ = separator;
     meterfiles_ = meterfiles;
+    meterfiles_dir_ = meterfiles_dir;
 }
 
 void Printer::print(Meter *meter)
@@ -37,7 +38,7 @@ void Printer::print(Meter *meter)
     if (meterfiles_) {
 	char filename[128];
 	memset(filename, 0, sizeof(filename));
-	snprintf(filename, 127, "/tmp/%s", meter->name().c_str());
+	snprintf(filename, 127, "%s/%s", meterfiles_dir_, meter->name().c_str());
 	output = fopen(filename, "w");
     }
 

printer.h

@@ -24,12 +24,13 @@
 using namespace std;
 
 struct Printer {
-    Printer(bool json, bool fields, char separator, bool meterfiles);
+    Printer(bool json, bool fields, char separator, bool meterfiles, const char *meterfiles_dir);
 
     void print(Meter *meter);
 
     private:
 
     bool json_, fields_, meterfiles_;
+    const char *meterfiles_dir_;
     char separator_;
 };