terminate afl-cmin early when signalled SIGINT

Author: hexcoder-

afl-cmin

@@ -397,10 +397,19 @@ BEGIN {
   cur = 0;
   if (!stdin_file) {
     print "    Processing "in_count" files (forkserver mode)..."
-    system( "AFL_CMIN_ALLOW_ANY=1 \""showmap"\" -m "mem_limit" -t "timeout" -o \""trace_dir"\" -Z "extra_par" -i \""in_dir"\" -- \""target_bin"\" "prog_args_string)
+    retval = system( "AFL_CMIN_ALLOW_ANY=1 \""showmap"\" -m "mem_limit" -t "timeout" -o \""trace_dir"\" -Z "extra_par" -i \""in_dir"\" -- \""target_bin"\" "prog_args_string)
   } else {
     print "    Processing "in_count" files (forkserver mode)..."
-    system( "AFL_CMIN_ALLOW_ANY=1 \""showmap"\" -m "mem_limit" -t "timeout" -o \""trace_dir"\" -Z "extra_par" -i \""in_dir"\" -- \""target_bin"\" "prog_args_string" </dev/null")
+    retval = system( "AFL_CMIN_ALLOW_ANY=1 \""showmap"\" -m "mem_limit" -t "timeout" -o \""trace_dir"\" -Z "extra_par" -i \""in_dir"\" -- \""target_bin"\" "prog_args_string" </dev/null")
+  }
+
+  if (retval > 127) {
+    retval = retval - 128
+    if (retval > 127) {
+      retval = retval - 128
+    }
+    printf "[!]Signal %d received, terminating...\n", retval
+    exit 1
   }
 
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