[hylafax-users] Re: hylafax mkdepend mishandles symlinks and GCC paths (Solaris 8, gcc)

["Phil Watkinson" <Pkwatkinson@tesco.net>]

Paul Eggert <eggert@twinsun.com> wrote to the hylafax-users list:
> I ran into a problem when porting hylafax-v4.0pl2 to Solaris 8 sparc,
> using /opt/sfw/bin/gcc (the version of GCC 2.95.2 that is distributed
> with Sun's Bonus CD).  The same problem occurs in hylafax-4.1beta2.
> [snip]
> The culprit is the following command in port/mkdepend.in:
>
> -e :loop -e 's:[^\./][^\./]*/\.\./::g' -e tloop \
>

Hi, Paul,

This bug has been found by James Lee, whose email with his patch to
solve the problem is added to the bottom of this mail.

Due to the fact that the number of HylaFAX users who use Solaris and
are sed experts are very few  (and based on the response James has
had to his patch I would guess that number is 1, James himself) there
has been no testing or confirmation that the patch is good;
consequently it has not been committed to the source yet.

Could I ask you to have a look at James' patch, and agree with him
the best way to sort this? Then it can be added to 4.1beta3.

Thanks,
Phil Watkinson.

> [snip]
> Here's a patch.
>
> 2000-06-23  Paul Eggert  <eggert@twinsun.com>
>
> * port/mkdepend.in: Don't try to optimize "a/b/../d" into
> "a/d".  This is incorrect if b is a symbolic link.  Also, the
> code was broken anyway: it transformed "/2.95.2/../"
> into "/2.95.../".
>
> ===================================================================
> RCS file: port/mkdepend.in,v
> retrieving revision 1.1
> retrieving revision 1.2
> diff -pu -r1.1 -r1.2
> --- port/mkdepend.in 1998/10/12 20:47:50 1.1
> +++ port/mkdepend.in 2000/06/24 00:57:32 1.2
> @@ -249,7 +249,6 @@ fi
>  depgenxx=`echo $depgen|sed -e s/\'//g -e 's/(/\\(/g' -e 's/)/\\)/g'`
>  $depgenxx $* |
>      eval "sed \
> - -e :loop -e 's:[^\./][^\./]*/\.\./::g' -e tloop \
>   -e 's:\([/ ]\)\./:\1:g' \
>   $sedprog" |
>      $AWK "$awkprog" >> $newdepfile
>

--------------------previous mail by James Lee---------------------------
Re sed script to simplify:
`/usr/local/lib/gcc-lib/sparc-sun-solaris2.7/2.95.1/../../../../sparc-sun-so
laris2.7/include/assert.h'

[snip]
So please allow me to offer this:

old line 252 and 253 in ``port/mkdepend.in'':
-e :loop -e 's:[^\./][^\./]*/\.\./::g' -e tloop \
-e 's:\([/ ]\)\./:\1:g' \
new:
-e s:///*:/:g -e 's:^: :' -e 's: \([^/ ]\): ./\1:g' \
-e :a -e 's:/\./:/:' -e 's:/\.\./://:' -e ta \
-e :b -e 's:/[^/ ][^/ ]*//:/:' -e tb \
-e :c -e s://:/../: -e tc \
-e 's: \./\([^ ]\): \1:g' -e 's:^ ::' \

The prevoius was flawed IF the file name contained '^' in the
directory before the ``..'' or the first directory begins with '^' and
the second is ``..'' and then ONLY because no reduction took place.
[Yes me over here, that's my hand in the air, my fault ...]


James Lee
jameswlee@lineone.net


PS has anyone a more interesting problem?




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