Re: [Crash-utility] Scripting infrastructure in crash
On May 2, 2007 09:36:44 am Sachin P. Sant wrote:
Dave, i came across one of the Crash TODO list items about having
a scripting infrastructure in crash.
I was trying to evaluate the Alicia utility [mentioned in todo list].
Here are some of my observations about Alicia.
Hi Sachin,
I am developing a set of Python-bindings (plus scripts) that we are using in
HP,
http://sourceforge.net/projects/pykdump
To compare with Alicia:
1] It is a wrapper on top of crash.
Pykdump is an extension written in C for time-critical access plus a set of
Python libraries/scripts. Faster than Alicia 10-100 times :-)
2] One can write perl based scripts to extract infromation from
dumps.
The same - I am mainly working on 'xportshow.py' - printing nicely various
tables/structures, mostly IPv6 aware. Routing tables, TCP/UDP/IP connections
analysis, ARP-cache, Netfilter, devpack and so on.
3] It has a nice report generation functionality which presents
the data in text as well as html format.
Not done yet.
4] Provides functions which could be used to read data from crash
dumps.
The same
5] It is easy to use and effective too.
Attached here is a sample script which i tried using Alicia to
display block and character devices. [ I know dev command already
does this stuff .. but for the sake of trying out the Alicia i chose
to write such a script ].
Also encountered few problems while trying out Alicia.
1] On PPC64 arch came across data type overflow problem while
executing the attached script.
2] On s390/s390x architecture class function provided by Alicia
seems broken.
Python API ('Pykdump') at this moment works only on i686/AMD64/IA64 only. The
porting to other platforms should be trivial but I just did not look at this.
3] Alicia is a wrapper on top of crash.
Pykdump can both drive crash externally (via 'pexpect' Python module) or run
as an extension from inside 'crash' session, e.g.
crash64> epython xportshow.py --summary
Other dump solutions [ lkcd ] has sial scripting which is c like
and very effective. Not sure how difficult it will be to implement
something like sial in crash.
Do you have any plans of having scripting infrastructure in
crash ? If yes your thoughts on Alicia / sial / < any other stuff >
Regards,
Alex
--
------------------------------------------------------------------
Alexandre Sidorenko email: alexs(a)hplinux.canada.hp.com
Global Solutions Engineering: Unix Networking
Hewlett-Packard (Canada)
------------------------------------------------------------------