[Feauture] support adbd listening on tcp port with uci config
Change-Id: Ic885b955900cf3cf20322ba5f54ff47d1eedf0ef
diff --git a/src/devtools/adb_tcp/remount_service.c b/src/devtools/adb_tcp/remount_service.c
new file mode 100644
index 0000000..72d15a1
--- /dev/null
+++ b/src/devtools/adb_tcp/remount_service.c
@@ -0,0 +1,138 @@
+/*
+ * Copyright (C) 2008 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.
+ */
+
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/mount.h>
+#include <unistd.h>
+
+#include "sysdeps.h"
+
+#define TRACE_TAG TRACE_ADB
+#include "adb.h"
+
+
+static int system_ro = 1;
+static int vendor_ro = 1;
+
+/* Returns the device used to mount a directory in /proc/mounts */
+static char *find_mount(const char *dir)
+{
+ int fd;
+ int res;
+ char *token = NULL;
+ const char delims[] = "\n";
+ char buf[4096];
+
+ fd = unix_open("/proc/mounts", O_RDONLY | O_CLOEXEC);
+ if (fd < 0)
+ return NULL;
+
+ buf[sizeof(buf) - 1] = '\0';
+ adb_read(fd, buf, sizeof(buf) - 1);
+ adb_close(fd);
+
+ token = strtok(buf, delims);
+
+ while (token) {
+ char mount_dev[256];
+ char mount_dir[256];
+ int mount_freq;
+ int mount_passno;
+
+ res = sscanf(token, "%255s %255s %*s %*s %d %d\n",
+ mount_dev, mount_dir, &mount_freq, &mount_passno);
+ mount_dev[255] = 0;
+ mount_dir[255] = 0;
+ if (res == 4 && (strcmp(dir, mount_dir) == 0))
+ return strdup(mount_dev);
+
+ token = strtok(NULL, delims);
+ }
+ return NULL;
+}
+
+static int hasVendorPartition()
+{
+ struct stat info;
+ if (!lstat("/vendor", &info))
+ if ((info.st_mode & S_IFMT) == S_IFDIR)
+ return true;
+ return false;
+}
+
+/* Init mounts /system as read only, remount to enable writes. */
+static int remount(const char* dir, int* dir_ro)
+{
+ char *dev;
+ int fd;
+ int OFF = 0;
+
+ if (dir_ro == 0) {
+ return 0;
+ }
+
+ dev = find_mount(dir);
+
+ if (!dev)
+ return -1;
+
+ fd = unix_open(dev, O_RDONLY | O_CLOEXEC);
+ if (fd < 0)
+ return -1;
+
+ ioctl(fd, BLKROSET, &OFF);
+ adb_close(fd);
+
+ *dir_ro = mount(dev, dir, "none", MS_REMOUNT, NULL);
+
+ free(dev);
+
+ return *dir_ro;
+}
+
+static void write_string(int fd, const char* str)
+{
+ writex(fd, str, strlen(str));
+}
+
+void remount_service(int fd, void *cookie)
+{
+ char buffer[200];
+ if (remount("/system", &system_ro)) {
+ snprintf(buffer, sizeof(buffer), "remount of system failed: %s\n",strerror(errno));
+ write_string(fd, buffer);
+ }
+
+ if (hasVendorPartition()) {
+ if (remount("/vendor", &vendor_ro)) {
+ snprintf(buffer, sizeof(buffer), "remount of vendor failed: %s\n",strerror(errno));
+ write_string(fd, buffer);
+ }
+ }
+
+ if (!system_ro && (!vendor_ro || !hasVendorPartition()))
+ write_string(fd, "remount succeeded\n");
+ else {
+ write_string(fd, "remount failed\n");
+ }
+
+ adb_close(fd);
+}
+