[K42-discussion] Small Error Code script (was: Allocating error codes)

[Robert Wisniewski]

I used to occasionally go through and fix repeated error codes and make
sure they were all unique, but I didn't defragment.  I guess it's been a
while since I've done this.  But anyone who feels so inclined should feel
free, especially if you wind up stumbling across one in debugging.

-bob

Robert Wisniewski
K42 MP OS, CPO, and CSO Projects
Advanced Operating Systems
IBM T.J. Watson Research Center
914-945-3181
http://www.research.ibm.com/K42/
bob at watson.ibm.com

----

Livio Soares writes:
 >   Hi Patrick,
 > 
 >   In actuality,  there are tons  of error code  numbers to choose  from, without
 > needing the IBM allocator. The trick is:  take of advantage of the fact that K42
 > sometimes leaks ;-P
 > 
 >   The following script might be of some  interest to people on the list. It uses
 > some GNU tools such as bash, grep, cut, sort; hopefully will work for everyone.
 > 
 > Usage: 
 > 
 >     k42_error_codes.sh kitchsrc-directory
 > 
 > Output:
 > 
 >   STDOUT:  A list  of code  numbers which  have leaked  and should  be currently
 >           available for use
 > 
 >   STDERR: Tags of two forms:
 > 
 >           1) "Strange error code: " + code number
 >               These are code numbers outside the [1000 - 10000] range. 
 > 
 >           2) "REPEAT: " + code number
 >               These are code numbers which show up more than once. 
 > 
 > 
 >   Caveat:  This script  does not  distinguish uncommented  from  commented code,
 >           hence:
 >           a) There  might  be  _more_  unused  codes than  it  detects  (but  it
 >              should never report a used error code)
 >           b) The  "REPEAT:" and  "Strange error code:"  tags could  be reporting
 >              invalid information. 
 > 
 > 
 >   Some useful numbers from the git tree:
 > 
 > $ ./k42_error_codes.sh ./kitchsrc/ 2> /dev/null | wc
 >     966     966    4830
 >  
 >     So; there are 966 unused/leaked error code to choose from. 
 > 
 > $ ./k42_error_codes.sh ./kitchsrc/ 2>&1 | grep ^REPEAT | wc
 >      99     198    1287
 > 
 >     There are 99 occurrences of repeated error codes! :-(
 > 
 > 
 >   I hope this is useful,
 > 
 > 			Livio
 > _______________________________________________
 > K42-discussion mailing list
 > K42-discussion at ozlabs.org
 > https://ozlabs.org/mailman/listinfo/k42-discussion