Add American Fuzzy Lop (afl) to third_party/afl/

third_party/afl/src/experimental/distributed_fuzzing/sync_script.sh

Index: third_party/afl/src/experimental/distributed_fuzzing/sync_script.sh
diff --git a/third_party/afl/src/experimental/distributed_fuzzing/sync_script.sh b/third_party/afl/src/experimental/distributed_fuzzing/sync_script.sh
new file mode 100755
index 0000000000000000000000000000000000000000..29bcba6470f7f35c09383e1c9b55ba043435a705
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+++ b/third_party/afl/src/experimental/distributed_fuzzing/sync_script.sh
@@ -0,0 +1,89 @@
+#!/bin/sh
+#
+# american fuzzy lop - fuzzer synchronization tool
+# ------------------------------------------------
+#
+# Written and maintained by Michal Zalewski <lcamtuf@google.com>
+#
+# Copyright 2014 Google Inc. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# To make this script work:
+#
+# - Edit FUZZ_HOSTS, FUZZ_DOMAIN, FUZZ_USER, and SYNC_DIR to reflect your
+#   environment.
+#
+# - Make sure that the system you are running this on can log into FUZZ_HOSTS
+#   without a password (authorized_keys or otherwise).
+#
+# - Make sure that every fuzzer is running with -o pointing to SYNC_DIR and -S
+#   that consists of its local host name, followed by an underscore, and then
+#   by some host-local fuzzer ID.
+#
+
+# Hosts to synchronize the data across.
+FUZZ_HOSTS='host1 host2 host3 host4'
+
+# Domain for all hosts
+FUZZ_DOMAIN='example.com'
+
+# Remote user for SSH
+FUZZ_USER=bob
+
+# Directory to synchronize
+SYNC_DIR='/home/bob/sync_dir'
+
+# Interval (seconds) between sync attempts
+SYNC_INTERVAL=$((30 * 60))
+
+if [ "$PWD" = "/tmp" -o "$PWD" = "/var/tmp" ]; then
+  echo "[-] Error: do not use shared /tmp or /var/tmp directories with this script." 1>&2
+  exit 1
+fi
+
+rm -rf .sync_tmp 2>/dev/null
+mkdir .sync_tmp || exit 1
+
+while :; do
+
+  # Pull data in...
+
+  for host in $FUZZ_HOSTS; do
+
+    echo "[*] Retrieving data from ${host}.${FUZZ_DOMAIN}..."
+
+    ssh -o 'passwordauthentication no' ${FUZZ_USER}@${host}.$FUZZ_DOMAIN \
+      "cd '$SYNC_DIR' && tar -czf - ${host}_*/[qf]*" >".sync_tmp/${host}.tgz"
+
+  done
+
+  # Distribute data. For large fleets, see tips in the docs/ directory.
+
+  for dst_host in $FUZZ_HOSTS; do
+
+    echo "[*] Distributing data to ${dst_host}.${FUZZ_DOMAIN}..."
+
+    for src_host in $FUZZ_HOSTS; do
+
+      test "$src_host" = "$dst_host" && continue
+
+      echo "    Sending fuzzer data from ${src_host}.${FUZZ_DOMAIN}..."
+
+      ssh -o 'passwordauthentication no' ${FUZZ_USER}@$dst_host \
+        "cd '$SYNC_DIR' && tar -xkzf -" <".sync_tmp/${src_host}.tgz"
+
+    done
+
+  done
+
+  echo "[+] Done. Sleeping for $SYNC_INTERVAL seconds (Ctrl-C to quit)."
+
+  sleep $SYNC_INTERVAL
+
+done
+