130 lines
3.5 KiB
C
130 lines
3.5 KiB
C
/*
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* Copyright (C) 2009 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/* this program is used to read a set of system properties and their values
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* from the emulator program and set them in the currently-running emulated
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* system. It does so by connecting to the 'boot-properties' qemud service.
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*
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* This program should be run as root and called from
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* /system/etc/init.goldfish.rc exclusively.
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*/
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#define LOG_TAG "qemu-props"
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#define DEBUG 1
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#if DEBUG
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# include <cutils/log.h>
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# define DD(...) ALOGI(__VA_ARGS__)
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#else
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# define DD(...) ((void)0)
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#endif
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#include <cutils/properties.h>
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#include <unistd.h>
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#include "qemud.h"
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/* Name of the qemud service we want to connect to.
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*/
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#define QEMUD_SERVICE "boot-properties"
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#define MAX_TRIES 5
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int main(void)
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{
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int qemud_fd, count = 0;
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/* try to connect to the qemud service */
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{
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int tries = MAX_TRIES;
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while (1) {
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qemud_fd = qemud_channel_open( "boot-properties" );
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if (qemud_fd >= 0)
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break;
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if (--tries <= 0) {
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DD("Could not connect after too many tries. Aborting");
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return 1;
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}
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DD("waiting 1s to wait for qemud.");
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sleep(1);
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}
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}
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DD("connected to '%s' qemud service.", QEMUD_SERVICE);
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/* send the 'list' command to the service */
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if (qemud_channel_send(qemud_fd, "list", -1) < 0) {
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DD("could not send command to '%s' service", QEMUD_SERVICE);
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return 1;
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}
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/* read each system property as a single line from the service,
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* until exhaustion.
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*/
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for (;;)
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{
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#define BUFF_SIZE (PROPERTY_KEY_MAX + PROPERTY_VALUE_MAX + 2)
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DD("receiving..");
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char* q;
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char temp[BUFF_SIZE];
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int len = qemud_channel_recv(qemud_fd, temp, sizeof temp - 1);
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/* lone NUL-byte signals end of properties */
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if (len < 0 || len > BUFF_SIZE-1 || temp[0] == '\0')
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break;
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temp[len] = '\0'; /* zero-terminate string */
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DD("received: %.*s", len, temp);
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/* separate propery name from value */
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q = strchr(temp, '=');
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if (q == NULL) {
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DD("invalid format, ignored.");
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continue;
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}
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*q++ = '\0';
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if (property_set(temp, q) < 0) {
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DD("could not set property '%s' to '%s'", temp, q);
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} else {
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count += 1;
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}
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}
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/* HACK start adbd periodically every minute, if adbd is already running, this is a no-op */
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for(;;) {
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usleep(60000000);
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char temp[BUFF_SIZE];
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property_get("sys.boot_completed", temp, "");
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int is_boot_completed = (strncmp(temp, "1", 1) == 0) ? 1 : 0;
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if (is_boot_completed) {
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DD("start adbd ...");
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property_set("qemu.adbd", "start");
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} else {
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DD("skip starting adbd ...");
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}
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}
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/* finally, close the channel and exit */
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close(qemud_fd);
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DD("exiting (%d properties set).", count);
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return 0;
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}
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