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/liblog/log_read.c b/liblog/log_read.c
index cfc8a7a..fb86757 100644
--- a/liblog/log_read.c
+++ b/liblog/log_read.c
@@ -797,6 +797,14 @@
}
if (logger_list->start.tv_sec || logger_list->start.tv_nsec) {
+ if (logger_list->mode & ANDROID_LOG_WRAP) {
+ // ToDo: alternate API to allow timeout to be adjusted.
+ ret = snprintf(cp, remaining, " timeout=%u",
+ ANDROID_LOG_WRAP_DEFAULT_TIMEOUT);
+ ret = min(ret, remaining);
+ remaining -= ret;
+ cp += ret;
+ }
ret = snprintf(cp, remaining, " start=%" PRIu32 ".%09" PRIu32,
logger_list->start.tv_sec,
logger_list->start.tv_nsec);