logd: liblog: logcat: Add LogWhiteBlackList

- liblog android_logger_get_log_size and android_logger_get_readable_size
  adjusted to return long instead of int because of -G flag extending range

NB: ifdef'd only for userdebug and eng builds

- liblog Add android_logger_[sg]et_prune_list and android_logger_set_log_size
- logcat Add -P, -p and -G flags
- logd Add LogWhiteBlackList and configurable log size

(cherry picked from commit 18a5432158ad43b8faefe4950b30e760200ce0b4)

Change-Id: I1572338c1b34bd968ad7867857ef708156ec3b6a

1 files changed, 32 insertions, 3 deletions

diff --git a/liblog/log_read_kern.c b/liblog/log_read_kern.c
index 59a7a0b..483b6b6 100644
--- a/liblog/log_read_kern.c
+++ b/liblog/log_read_kern.c
@@ -227,16 +227,26 @@ int android_logger_clear(struct logger *logger)
 }
 
 /* returns the total size of the log's ring buffer */
-int android_logger_get_log_size(struct logger *logger)
+long android_logger_get_log_size(struct logger *logger)
 {
     return logger_ioctl(logger, LOGGER_GET_LOG_BUF_SIZE, O_RDWR);
 }
 
+#ifdef USERDEBUG_BUILD
+
+int android_logger_set_log_size(struct logger *logger UNUSED,
+                                unsigned long size UNUSED)
+{
+    return -ENOTSUP;
+}
+
+#endif /* USERDEBUG_BUILD */
+
 /*
  * returns the readable size of the log's ring buffer (that is, amount of the
  * log consumed)
  */
-int android_logger_get_log_readable_size(struct logger *logger)
+long android_logger_get_log_readable_size(struct logger *logger)
 {
     return logger_ioctl(logger, LOGGER_GET_LOG_LEN, O_RDONLY);
 }
@@ -253,15 +263,34 @@ int android_logger_get_log_version(struct logger *logger)
 /*
  * returns statistics
  */
+static const char unsupported[] = "18\nNot Supported\n\f";
 
 ssize_t android_logger_get_statistics(struct logger_list *logger_list UNUSED,
                                       char *buf, size_t len)
 {
-    static const char unsupported[] = "18\nNot Supported\n\f";
     strncpy(buf, unsupported, len);
     return -ENOTSUP;
 }
 
+#ifdef USERDEBUG_BUILD
+
+ssize_t android_logger_get_prune_list(struct logger_list *logger_list UNUSED,
+                                      char *buf, size_t len)
+{
+    strncpy(buf, unsupported, len);
+    return -ENOTSUP;
+}
+
+int android_logger_set_prune_list(struct logger_list *logger_list UNUSED,
+                                  char *buf, size_t len)
+{
+    static const char unsupported_error[] = "Unsupported";
+    strncpy(buf, unsupported, len);
+    return -ENOTSUP;
+}
+
+#endif /* USERDEBUG_BUILD */
+
 struct logger_list *android_logger_list_alloc(int mode,
                                               unsigned int tail,
                                               pid_t pid)