liblog: Support for ANDROID_LOG_WRAP mode flag on reader
If ANDROID_LOG_WRAP is specified, add timeout=3600 to the reader
request. logd will comply by going to sleep with the socket open.
If the start time is about to wrap or get pruned in the specified log
buffers, then wakeup and dump the logs; or wakeup on timeout,
whichever comes first.
Bug: 25929746
Change-Id: I531b4317a20abcf3ba87d78c68fa2f268a4488ab
diff --git a/include/log/logger.h b/include/log/logger.h
index ff70529..b3928a7 100644
--- a/include/log/logger.h
+++ b/include/log/logger.h
@@ -163,6 +163,8 @@
#define ANDROID_LOG_RDWR O_RDWR
#define ANDROID_LOG_ACCMODE O_ACCMODE
#define ANDROID_LOG_NONBLOCK O_NONBLOCK
+#define ANDROID_LOG_WRAP 0x40000000 /* Block until buffer about to wrap */
+#define ANDROID_LOG_WRAP_DEFAULT_TIMEOUT 7200 /* 2 hour default */
#define ANDROID_LOG_PSTORE 0x80000000
struct logger_list *android_logger_list_alloc(int mode,