trying to build dash: awk and sort bugs uncovered

[Denis Vlasenko]

On Tuesday 02 January 2007 05:03, Rob Landley wrote:
> > I tried to build dash (Debian ash) and found the following.
> 
> While trying to build what actual packages?  (What actually _broke_?)

dash is an ash ported to Debian. I tried to compile it
on a system where /bin/sort and /bin/awk are symlinks
to busybox.

> > sort -u -k 3.3: incorrect workings of -u[nigue] option:
> 
> 3,3 is a standard, 3.3 is a gnu extension.  That said I'm under the vague 
> impression I implemented it at some point.

IIRC manpage says -k N[.Nflags][,N[.Nflags]] and bbox indeed supports
almost all of this.

> However, what you gave isn't a  
> test I can reproduce.

Sorry. See attached test script. For it was showing the following:

--- 1   Tue Jan  2 16:54:50 2007
+++ 2   Tue Jan  2 16:54:50 2007
@@ -1,7 +1,9 @@
      10 echo   echocmd
       6 cd     cdcmd
+      7 chdir  cdcmd
       4 bg     bgcmd
       3 alias  aliascmd
       8 command        commandcmd
       1 .      dotcmd
       5 break  breakcmd
+      9 continue       breakcmd

In other words, our sort -u did not discard lines if _key_
(not entire line) is the same, while coreutils did.

I will describe awk bug if you really want to know.
Or else yust look at current awk.c - it has a comment on that
in awk_main().

I already fixed sort -u and awk bugs.
You won't see awk bug anyway because you are most probably
in POSIX locale.
--
vda
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