auto import from //depot/cupcake/@135843
diff --git a/adb/log_service.c b/adb/log_service.c
new file mode 100644
index 0000000..6e9bdee
--- /dev/null
+++ b/adb/log_service.c
@@ -0,0 +1,92 @@
+/*
+ * Copyright (C) 2007 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 <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <sys/socket.h>
+#include <cutils/logger.h>
+#include "sysdeps.h"
+#include "adb.h"
+
+#define LOG_FILE_DIR "/dev/log/"
+
+void write_log_entry(int fd, struct logger_entry *buf);
+
+void log_service(int fd, void *cookie)
+{
+ /* get the name of the log filepath to read */
+ char * log_filepath = cookie;
+
+ /* open the log file. */
+ int logfd = unix_open(log_filepath, O_RDONLY);
+ if (logfd < 0) {
+ goto done;
+ }
+
+ // temp buffer to read the entries
+ unsigned char buf[LOGGER_ENTRY_MAX_LEN + 1] __attribute__((aligned(4)));
+ struct logger_entry *entry = (struct logger_entry *) buf;
+
+ while (1) {
+ int ret;
+
+ ret = unix_read(logfd, entry, LOGGER_ENTRY_MAX_LEN);
+ if (ret < 0) {
+ if (errno == EINTR || errno == EAGAIN)
+ continue;
+ // perror("logcat read");
+ goto done;
+ }
+ else if (!ret) {
+ // fprintf(stderr, "read: Unexpected EOF!\n");
+ goto done;
+ }
+
+ /* NOTE: driver guarantees we read exactly one full entry */
+
+ entry->msg[entry->len] = '\0';
+
+ write_log_entry(fd, entry);
+ }
+
+done:
+ unix_close(fd);
+ free(log_filepath);
+}
+
+/* returns the full path to the log file in a newly allocated string */
+char * get_log_file_path(const char * log_name) {
+ char *log_device = malloc(strlen(LOG_FILE_DIR) + strlen(log_name) + 1);
+
+ strcpy(log_device, LOG_FILE_DIR);
+ strcat(log_device, log_name);
+
+ return log_device;
+}
+
+
+/* prints one log entry into the file descriptor fd */
+void write_log_entry(int fd, struct logger_entry *buf)
+{
+ size_t size = sizeof(struct logger_entry) + buf->len;
+
+ writex(fd, buf, size);
+}