STREAMS-UX Programmer's Guide (February 2007)

STREAMS Commands
strace and strerr
Appendix G
292
pri Tracing priority level as defined by the STREAMS driver or module that created the
messages.
ind Can be any combination of the following three message indicators:
T: The message has also been saved in the trace log.
F: The message signalled a fatal error.
N: The message has also been mailed to the system administrator.
mod Module identification number of the trace message source.
text trace message text.
strace runs until it is terminated by the user.
NOTE strerr runs continuously until terminated by the user. Only one strerr process at a time can
open the STREAMS log driver. This restriction is intended to maximize performance. The
STREAMS error logging mechanism works best when it is not overused. strerr can degrade
STREAMS performance by affecting the response, throughput, and other behaviors of the
drivers and modules that invoke it. strerr also fails to capture messages if drivers and
modules generate messages at a higher rate than its optimum read rate. If there are missing
sequence numbers among the messages in a log file, messages have been lost.