--- /dev/null
+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ *
+ * 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
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/* this program is used to read a set of system properties and their values
+ * from the emulator program and set them in the currently-running emulated
+ * system. It does so by connecting to the 'boot-properties' qemud service.
+ *
+ * This program should be run as root and called from
+ * /system/etc/init.goldfish.rc exclusively.
+ */
+
+#define LOG_TAG "qemu-props"
+
+#define DEBUG 1
+
+#if DEBUG
+# include <cutils/log.h>
+# define DD(...) ALOGI(__VA_ARGS__)
+#else
+# define DD(...) ((void)0)
+#endif
+
+#include <cutils/properties.h>
+#include <unistd.h>
+#include <hardware/qemud.h>
+
+/* Name of the qemud service we want to connect to.
+ */
+#define QEMUD_SERVICE "boot-properties"
+
+#define MAX_TRIES 5
+
+int main(void)
+{
+ int qemud_fd, count = 0;
+
+ /* try to connect to the qemud service */
+ {
+ int tries = MAX_TRIES;
+
+ while (1) {
+ qemud_fd = qemud_channel_open( "boot-properties" );
+ if (qemud_fd >= 0)
+ break;
+
+ if (--tries <= 0) {
+ DD("Could not connect after too many tries. Aborting");
+ return 1;
+ }
+
+ DD("waiting 1s to wait for qemud.");
+ sleep(1);
+ }
+ }
+
+ DD("connected to '%s' qemud service.", QEMUD_SERVICE);
+
+ /* send the 'list' command to the service */
+ if (qemud_channel_send(qemud_fd, "list", -1) < 0) {
+ DD("could not send command to '%s' service", QEMUD_SERVICE);
+ return 1;
+ }
+
+ /* read each system property as a single line from the service,
+ * until exhaustion.
+ */
+ for (;;)
+ {
+#define BUFF_SIZE (PROPERTY_KEY_MAX + PROPERTY_VALUE_MAX + 2)
+ DD("receiving..");
+ char* q;
+ char temp[BUFF_SIZE];
+ int len = qemud_channel_recv(qemud_fd, temp, sizeof temp - 1);
+
+ /* lone NUL-byte signals end of properties */
+ if (len < 0 || len > BUFF_SIZE-1 || temp[0] == '\0')
+ break;
+
+ temp[len] = '\0'; /* zero-terminate string */
+
+ DD("received: %.*s", len, temp);
+
+ /* separate propery name from value */
+ q = strchr(temp, '=');
+ if (q == NULL) {
+ DD("invalid format, ignored.");
+ continue;
+ }
+ *q++ = '\0';
+
+ if (property_set(temp, q) < 0) {
+ DD("could not set property '%s' to '%s'", temp, q);
+ } else {
+ count += 1;
+ }
+ }
+
+
+ /* finally, close the channel and exit */
+ close(qemud_fd);
+ DD("exiting (%d properties set).", count);
+ return 0;
+}