android_logcat_4.4

Logcat

相关代码位置

./drivers/staging/android/logger.h

./drivers/staging/android/logger.c

./system/core/liblog/logd_write.c

./system/core/.include/cutils/logger.h

./system/core/include/cutils/log.h

./system/core/logcat/logcat.cpp

./system/core/liblog/logprint.h

./system/core/liblog/logprint.c

./frameworks/base/core/jni/android_util_Log.cpp

./frameworks/base/core/jni/android_util_EventLog.cpp

./frameworks/base/core/java/android/util/EventLog.java

./frameworks/base/core/java/android/util/EventLogTags.java

./frameworks/base/core/java/android/util/Log.java

./frameworks/base/core/java/android/util/Slog.java

Usage: %s [options] [filterspecs]

options include:
  -s              Set default filter to silent.
                  Like specifying filterspec '*:s'
  -f    Log to file. Default to stdout
  -r []   Rotate log every kbytes. (16 if unspecified). Requires -f
  -n       Sets max number of rotated logs to , default 4
  -v      Sets the log print format, where  is one of:
                  brief process tag thread raw time threadtime long
  -c              clear (flush) the entire log and exit
  -d              dump the log and then exit (don't block)
  -t       print only the most recent  lines (implies -d)
  -g              get the size of the log's ring buffer and exit
  -b      Request alternate ring buffer, 'main', 'system', 'radio'
                  or 'events'. Multiple -b parameters are allowed and the
                  results are interleaved. The default is -b main -b system.
  -B              output the log in binary);


filterspecs are a series of 
  [:priority]
where  is a log component tag (or * for all) and priority is:
  V    Verbose
  D    Debug
  I    Info
  W    Warn
  E    Error
  F    Fatal
  S    Silent (supress all output)
		'*' means '*:d' and  by itself means :v
		If not specified on the commandline, filterspec is set from ANDROID_LOG_TAGS.
		If no filterspec is found, filter defaults to '*:I'
		If not specified with -v, format is set from ANDROID_PRINTF_LOG or defaults to brief);
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