logcat: add pstore read

Used to pull the Android log messages after a reboot.
A companion to the pstore console logs. Adding the -L
flag triggers this behavior.

Change-Id: Icce2dc00bcbb26975bea604420c6be397869e804

1 files changed, 6 insertions, 1 deletions

diff --git a/logcat/logcat.cpp b/logcat/logcat.cpp
index d831d66..cd5003e 100644
--- a/logcat/logcat.cpp
+++ b/logcat/logcat.cpp
@@ -237,6 +237,7 @@ static void show_help(const char *cmd)
                     "  -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"
+                    "  -L              dump logs from prior to last reboot\n"
                     "  -b <buffer>     Request alternate ring buffer, 'main', 'system', 'radio',\n"
                     "                  'events', 'crash' or 'all'. Multiple -b parameters are\n"
                     "                  allowed and results are interleaved. The default is\n"
@@ -348,7 +349,7 @@ int main(int argc, char **argv)
     for (;;) {
         int ret;
 
-        ret = getopt(argc, argv, "cdDt:T:gG:sQf:r:n:v:b:BSpP:");
+        ret = getopt(argc, argv, "cdDLt:T:gG:sQf:r:n:v:b:BSpP:");
 
         if (ret < 0) {
             break;
@@ -365,6 +366,10 @@ int main(int argc, char **argv)
                 mode |= ANDROID_LOG_WRONLY;
             break;
 
+            case 'L':
+                mode |= ANDROID_LOG_PSTORE;
+            break;
+
             case 'd':
                 mode |= ANDROID_LOG_RDONLY | ANDROID_LOG_NONBLOCK;
             break;