Date: Tue, 13 May 2008 18:14:48 GMT From: Elias Pipping <elias@pipping.org> To: freebsd-gnats-submit@FreeBSD.org Subject: misc/123635: jot handles 'stuttering sequences' and reversed ranges incorrectly Message-ID: <200805131814.m4DIEmhL079753@www.freebsd.org> Resent-Message-ID: <200805131820.m4DIK1v4030778@freefall.freebsd.org>
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>Number: 123635
>Category: misc
>Synopsis: jot handles 'stuttering sequences' and reversed ranges incorrectly
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Tue May 13 18:20:01 UTC 2008
>Closed-Date:
>Last-Modified:
>Originator: Elias Pipping
>Release: current
>Organization:
>Environment:
The tests were run on an intel mac with the /usr.bin/jot code from CVS
$ uname -a
Darwin mac.local 9.2.2 Darwin Kernel Version 9.2.2: Tue Mar 4 21:17:34 PST 2008; root:xnu-1228.4.31~1/RELEASE_I386 i386
>Description:
Jot does not seem to be working correctly, with regard to both intuition
and to the manpage.
I'll use pp.awk to format the output of jot a bit -- you can find the
code further down.
The manpage suggests:
The stuttering sequence 9, 9, 8, 8, 7, etc. can be produced by
suitable choice of step size, as in
jot - 9 0 -.5
This is what happens:
$ jot - 9 0 -.5 | awk -f pp.awk
2 3 4 5 6 7 8 9 0 1
3 1 3 1 3 1 3 1 2 1
Furthermore, while this works:
$ jot -r 10000 0 9 | awk -f pp.awk
2 3 4 5 6 7 8 9 0 1
999 977 1008 972 989 1007 1006 1053 1032 957
This should produce basically the same results, but it does not:
$ jot -r 10000 9 0 | awk -f pp.awk
9 10 11 12 13 14 15 16
1237 1233 1271 1210 1247 1260 1262 1280
Appendix
========
$ cat pp.awk
{
freq[$0]++
}
END \
{
for (entry in freq)
printf("%4s ", entry);
print("");
for (entry in freq)
printf("%4d ", freq[entry]);
print("");
}
>How-To-Repeat:
This script
http://page.mi.fu-berlin.de/pipping/jot/test_jot.sh
runs a couple of tests with jot fetched from multiple BSDs' CVS repositories. (Tested on Mac OS X only)
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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