tree c0e0993578b8e228ec369d9fa0c98f3fb5de61ee
parent 0824f4c641ccaf1d94b6f29c45b70e5508fc556d
author YoungSeok Yoon <youngseokyoon@google.com> 1452184913 -0800
committer YoungSeok Yoon <youngseokyoon@google.com> 1459542005 -0700

devtools/madb: prefix console messages with device ids

This CL implements prefixer, an io.Writer wrapper that internally
buffers the output and adds the given prefix to each line of the
output.

madb exec command now uses this prefixer to distinguish console
messages coming from different devices.

Change-Id: I2ac3302bdadd9a781b80a94ebf3fa20a5e2cac62