STREAMS/UX for the HP 9000 Reference Manual

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Debugging STREAMS/UX Modules and Drivers

STREAMS/UX Debugging Tool

Enter the :S command to switch from primary mode to STREAMS/UX

subsystem mode. After invoking strdb, you are in primary mode. Enter :S

to switch to STREAMS/UX subsystem mode. In STREAMS/UX subsystem

mode, you can see which STREAMS/UX are conﬁgured and active on the

system. An example is shown below.

strdb

No current structure S:0

STREAMS subsystem help commands..

? - show this help menu

h - show this help menu

la 'name' - list all active STREAMS on device 'name'

ll 'name' 'minor' - list all drivers linked under the STREAMS

driver 'name' and minor number 'minor'

lm 'name' 'minor' - list all modules pushed on STREAMS device

'name' and whose minor number is 'minor'

lp 'name' 'minor' - list all drivers persistently linked under

the

STREAMS device 'name' and minor number

'minor'

q - quit the STREAMS subsystem commands

qc 'driver' 'file' - print 'driver' read / write side qcount

to file

qh 'name' 'minor' - display STREAM head queue structure

for device 'name' and minor number 'minor'

s [m | d] - Option d lists all the STREAMS drivers

configured in the system. Option m lists

all the modules configured in the system

v - print version of STREAMS structures

displayed

Debugging with strdb

This section shows examples of using strdb to debug STREAMS/UX drivers

and modules. The examples show how to use strdb on a running system.

The adb debugging section of this chapter shows an example of using strdb

in conjunction with adb to analyze an HP-UX core ﬁle.