--- cint-5.18.00/cint/src/init.cxx	2010-08-17 13:02:16.000000000 +0100
+++ cint/cint/src/init.cxx	2010-08-23 21:26:49.000000000 +0100
@@ -568,6 +568,8 @@
    static char clnull[1] = "";
    struct G__dictposition stubbegin;
    char* icom = 0;
+		int prohibitinteraction = 0;
+
    /*****************************************************************
     * Setting STDIOs.  May need to modify here.
     *  init.c, end.c, scrupto.c, pause.c
@@ -690,9 +692,17 @@
     * Get command options
     *************************************************************/
    char magicchars[100];
-   strcpy(magicchars,".:a:b:c:d:ef:gij:kl:mn:pq:rstu:vw:x:y:z:AB:CD:EF:G:H:I:J:L:KM:N:O:P:QRSTU:VW:X:Y:Z:-:@+:");
+		strcpy(magicchars,".:a:b:c:d:ef:gij:kl:mn:o:pq:rstu:vw:x:y:z:AB:CD:EF:G:H:I:J:L:KM:N:O:P:QRSTU:VW:X:Y:Z:-:@+:");
    while ((c = getopt(argc, argv, magicchars)) != EOF) {
       switch (c) {
+					
+					// option : 1 - Interaction with user prohibited
+				case 'o':
+					if ('1' == optarg[0]) {
+						prohibitinteraction = 1;
+					}
+					break;
+					
 #ifndef G__OLDIMPLEMENTATION2226
          case '+':
             G__setmemtestbreak(atoi(optarg) / 10000, atoi(optarg) % 10000);
@@ -1039,6 +1049,12 @@
             icom = optarg;
             break;
          default:
+					
+					if (prohibitinteraction ==1) {
+						G__more(G__sout, "invalid commandline option\n");
+						return EXIT_FAILURE;
+					}
+					
 #ifndef G__SMALLOBJECT
             G__more_pause((FILE*)NULL, 0);
             fprintf(G__sout, usage, progname);
@@ -1080,6 +1096,7 @@
             G__more(G__sout, "* -M [newdelmask] : operator new/delete mask for precompiled interface method\n");
             G__more(G__sout, "* -n [linkname] : Specify precompiled interface method filename\n");
             G__more(G__sout, "* -N [DLL_name] : Specify DLL interface method name\n");
+					G__more(G__sout, "  -o [1]: option : [1] Interaction with user prohibited\n");
             G__more(G__sout, "  -O [0~4] : Loop compiler on(1~5) off(0). Default on(4)\n");
             G__more(G__sout, "  -p : use preprocessor prior to interpretation\n");
             G__more(G__sout, "  -q [security] : Set security level(default 0)\n");
@@ -1099,6 +1116,7 @@
             G__more(G__sout, "  -Y [0|1]: ignore std namespace (default=1:ignore)\n");
             G__more(G__sout, "  -Z [0|1]: automatic loading of standard header files with DLL\n");
             G__more(G__sout, "  --'command': Execute interactive command and terminate Cint\n");
+
             G__more(G__sout, "suboptions\n");
             G__more(G__sout, "  +V : turn on class title comment mode for following source fies\n");
             G__more(G__sout, "  -V : turn off class title comment mode for following source fies\n");
@@ -1523,14 +1541,18 @@
             alarm(G__TIMEOUT);
          }
 #endif
-         if (G__catchexception != 2) G__pause();
+				
+				if (prohibitinteraction == 0  && G__catchexception != 2) G__pause();
+				
 #ifdef SIGALRM
          if (G__RETURN_EXIT1 == G__return) {
             alarm(0);
             G__fprinterr(G__serr, "Time out cancelled\n");
          }
 #endif
-         if (G__catchexception != 2) G__pause();
+				
+				if (prohibitinteraction == 0  && G__catchexception != 2) G__pause();
+				
       }
       if (G__stepover) {
          G__step = 0;
@@ -1560,7 +1582,22 @@
       return EXIT_SUCCESS;
    }
 #endif
+		
+		/*****************************************
+		 * If no main() and probibit interaction, 
+		 * Print out message and quit
+		 *****************************************/
+		else if (prohibitinteraction == 1) {
+			if (!G__quiet) {
+				fprintf(G__sout, "No main() function found in given source file..\n");
+			}
+			G__return = G__RETURN_NON;
+			G__scratch_all();
+			return EXIT_FAILURE;		
+		}
+		
    else {
+			
       /*************************************
        * If no main() ,
        * Print out message and