refactor, improve usage and save the argv0

SICSmain.c

@@ -28,6 +28,7 @@
 
 IPair *pSICSOptions = NULL;
 pServer pServ = NULL;
+const char *argv0;
 
 /* ========================= Less dreadful file statics =================== */
 
@@ -36,6 +37,8 @@ pServer pServ = NULL;
 int usage(const char *name)
 {
   fprintf(stderr, "usage: %s [-d] [-nolog] <config.tcl>\n", name);
+  fprintf(stderr, "      -d: daemonize the process\n");
+  fprintf(stderr, "  -nolog: disable log file writing\n");
   return 1;
 }
 
@@ -51,19 +54,25 @@ int main(int argc, char *argv[])
   char *file = NULL;
   int i, firstArg = 1;
 
+  argv0 = argv[0];
   if (argc < 2)
     return usage(argv[0]);
 
   /* initialise, will die on you if problems */
-  if (strcasecmp(argv[1], "-d") == 0) {
-    daemonize = 1;
-    firstArg = 2;
-  }
+
   for (i = firstArg; i < argc; i++) {
-    if (strcmp(argv[i], "-nolog") == 0) {
-      SICSLogEnable(0);
+    if (argv[i][0] == '-') {
+      if (strcasecmp(argv[i], "-nolog") == 0) {
+        SICSLogEnable(0);
+      } else if (strcasecmp(argv[i], "-d") == 0) {
+        daemonize = 1;
+      } else {
+        fprintf(stderr, "Unrecognized option ignored: %s\n", argv[i]);
+      }
     } else if (file == NULL) {
       file = argv[i];
+    } else {
+      fprintf(stderr, "Unrecognized argument ignored: %s\n", argv[i]);
     }
   }