logcat: document help tail from time
(cherry picked from commit 6a594683ec8aa2c8cee98a95f502772db515e60e)
Bug: 17323719
Change-Id: Id057dde60e699c946828f4aeabedf1728b3bc877
diff --git a/logcat/logcat.cpp b/logcat/logcat.cpp
index 7c6af42..858e56c 100644
--- a/logcat/logcat.cpp
+++ b/logcat/logcat.cpp
@@ -224,7 +224,10 @@
" -c clear (flush) the entire log and exit\n"
" -d dump the log and then exit (don't block)\n"
" -t <count> print only the most recent <count> lines (implies -d)\n"
+ " -t '<time>' print most recent lines since specified time (implies -d)\n"
" -T <count> print only the most recent <count> lines (does not imply -d)\n"
+ " -T '<time>' print most recent lines since specified time (not imply -d)\n"
+ " count is pure numerical, time is 'MM-DD hh:mm:ss.mmm'\n"
" -g get the size of the log's ring buffer and exit\n"
" -b <buffer> Request alternate ring buffer, 'main', 'system', 'radio',\n"
" 'events', 'crash' or 'all'. Multiple -b parameters are\n"