sonixflasher: introduce versioning

also guard against offset selection without arg

sonixflasher.c

@@ -27,6 +27,9 @@
 
 #define MAX_ATTEMPTS 5
 
+#define PROJECT_NAME "sonixflasher"
+#define PROJECT_VER "1.0.0"
+
 long MAX_FIRMWARE = MAX_FIRMWARE_SN32F260;
 
 static void print_usage(char *m_name)
@@ -39,6 +42,7 @@ static void print_usage(char *m_name)
         "  --offset -o      Set flashing offset (default: 0)\n"
         "  --file -f        Binary of the firmware to flash (*.bin extension) \n"
         "  --jumploader -j  Define if we are flashing a jumploader \n"
+        "  --version -V      Print version information\n"
         "\n"
         "Examples: \n"
         ". Flash jumploader to device w/ vid/pid 0x0c45/0x7040 \n"
@@ -50,6 +54,12 @@ static void print_usage(char *m_name)
         "", m_name);
 }
 
+//Display program version
+static void display_version(char *m_name)
+{
+    fprintf(stderr,"%s " PROJECT_VER "\n",m_name);
+}
+
 void clear_buffer(unsigned char *data, size_t lenght)
 {
     for(int i = 0; i < lenght; i++) data[i] = 0;
@@ -246,26 +256,30 @@ int main(int argc, char* argv[])
 
     if(argc < 2)
     {   
-        print_usage("sonixflasher");
+        print_usage(PROJECT_NAME);
         exit(1);
     }
 
     struct option longoptions[] =
     {
         {"help",       no_argument, 0, 'h'},
+        {"version",    no_argument, 0, 'V'},
         {"vidpid",     required_argument, NULL, 'v'},
         {"offset",     optional_argument, NULL, 'o'},
         {"file",       required_argument, NULL, 'f'},
         {"jumploader", required_argument, NULL, 'j'},
         {NULL,0,0,0}
     };
 
-    while ((opt = getopt_long(argc, argv, "hv:o:f:j", longoptions, &opt_index)) != -1)
+    while ((opt = getopt_long(argc, argv, "hVv:o:f:j", longoptions, &opt_index)) != -1)
     {
         switch (opt)
         {
-            case 0: // Show help
-                print_usage("sonixflasher");
+            case 'h': // Show help
+                print_usage(PROJECT_NAME);
+                break;
+            case 'V': // version
+                display_version(PROJECT_NAME);
                 break;
             case 'v': // Set vid/pid
                 if( sscanf(optarg, "%4hx/%4hx", &vid,&pid) !=2 ) {  // match "23FE/AB12"
@@ -292,6 +306,7 @@ int main(int argc, char* argv[])
                 {
                     case 'f':
                     case 'v':
+                    case 'o':
                         fprintf(stderr, "ERROR: option '-%c' requires a parameter.\n", optopt);
                         break;
                     case 0:
@@ -303,7 +318,8 @@ int main(int argc, char* argv[])
                 }
                 exit(1);
         }
-
+        // exit clean after printing
+        if(opt == 'h' || opt == 'V') exit(1);
     }
 
     if (file_name == NULL)