. Put version string into separate variable

 . Added mechanism that will prevent function calls for not existing files.
   This prevents us from unneccessary empty files.

diff --git a/main.c b/main.c
index c024c8c..94029a0 100644 (file)
--- a/main.c
+++ b/main.c
@@ -19,7 +19,11 @@
     $Id$
  */
 
+static char version[] = "0.2.1";
+
 #include <stdio.h>
+#include <sys/stat.h>
+#include <unistd.h>
 #include "dtaus.h"
 
 void help ()
@@ -45,6 +49,7 @@ void main (int argc, char **argv)
   char *check[60];
   int action = 0;
   int i = 0;
+  struct stat sbuf;
 
   strcpy ((char *)dtaus, "dtaus0.txt");
   strcpy ((char *)control, "dtaus0.ctl");
@@ -56,7 +61,7 @@ void main (int argc, char **argv)
     if ( !strcmp(argv[i], "-h") ) {
       help(); exit(0);
     } else if ( !strcmp(argv[i], "-v") ) {
-      printf ("dtaus version 0.2 - Copyright (c) 1997 by Martin Schulze <joey@infodrom.north.de>\n");
+      printf ("dtaus version %s - Copyright (c) 1997,8 by Martin Schulze <joey@infodrom.north.de>\n", version);
       exit (0);
     } else if ( !strcmp(argv[i], "-d") ) {
       if (argc - i > 1) {
@@ -85,10 +90,16 @@ void main (int argc, char **argv)
     } 
   }
 
-  if (action == DTAUS)
-    control2dtaus ((char *)control, (char *)dtaus, (char *)beleg, (char *)check);
-  else if (action == CONTROL)
-    dtaus2control ((char *)dtaus, (char *)control);
-  else
+  if (action == DTAUS) {
+    if (!stat((char *)control, &sbuf))
+      control2dtaus ((char *)control, (char *)dtaus, (char *)beleg, (char *)check);
+    else exit (1);
+  } else if (action == CONTROL) {
+    if (!stat((char *)dtaus, &sbuf))
+      dtaus2control ((char *)dtaus, (char *)control);
+    else exit (1);
+  } else {
     printf ("Keine Routine angegeben (-dtaus bzw. -control vergessen).\n");
+    exit (1);
+  }
 }