•char *buf1 = malloc(20);
•char *buf2 = malloc(10);
•…
•strcpy(buf1,argv[1]);
•…
•// perform security check and store the results
in
•// buf2
•while(strlen(buf2) < 1) {
•….
•} // end of while security check loop
•if(!strcmp(buf2,“PASSED”))
• exit(0);
•else {
// continue doing stuff only if we passed
• // security check