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From: Hallvard B Furuseth on 15 Dec 2009 05:19
Stephane CHAZELAS writes:
>2009-12-14, 17:20(+00), Icarus Sparry:
>> So hopefully
>> test -z "${DISUTILE_DEBUG+yes} && unset DISTUTILS_DEBUG
>> will fix your problem.
>> (...)
>
> The common way to make a command immune to set -e is to write
> it:
>
> unset DISTUTILS_DEBUG || : OK

If the unset fails, that'll likely make noise on stderr.
Redirecting stderr from builtins may not work, and putting it in
a subshell cancels the effect but does yield an exit status, so:

(unset DISTUTILS_DEBUG) >/dev/null 2>&1 && unset DISTUTILS_DEBUG

Though Icarus' version looks simpler in this case.

--
Hallvard
From: Hallvard B Furuseth on 15 Dec 2009 08:53
Another followup-to-self:
>Stephane CHAZELAS writes:
>>2009-12-14, 17:20(+00), Icarus Sparry:
>>> So hopefully
>>> test -z "${DISUTILE_DEBUG+yes} && unset DISTUTILS_DEBUG
>>> will fix your problem.
>>> (...)

Or
test -n "${DISTUTILE_DEBUG+yes}" || unset DISTUTILS_DEBUG
if the point was to make sh -e happy. Same with mine, which still
needed the '|| : OK' at the end:

>> The common way to make a command immune to set -e is to write
>> it:
>>
>> unset DISTUTILS_DEBUG || : OK
>(...)
> (unset DISTUTILS_DEBUG) >/dev/null 2>&1 && unset DISTUTILS_DEBUG

--
Hallvard
From: Stephane CHAZELAS on 15 Dec 2009 14:24
2009-12-15, 11:19(+01), Hallvard B Furuseth:
> Stephane CHAZELAS writes:
>>2009-12-14, 17:20(+00), Icarus Sparry:
>>> So hopefully
>>> test -z "${DISUTILE_DEBUG+yes} && unset DISTUTILS_DEBUG
>>> will fix your problem.
>>> (...)
>>
>> The common way to make a command immune to set -e is to write
>> it:
>>
>> unset DISTUTILS_DEBUG || : OK
>
> If the unset fails, that'll likely make noise on stderr.

Not in the case of bash prior to 2.05b discussed here though.

> Redirecting stderr from builtins may not work

I don't know of any POSIX shell where that doesn't work. Some
versions of the Bourne shell are known to have that kind of
issue. Sven will certainly have more details ;)

> and putting it in
> a subshell cancels the effect but does yield an exit status, so:
>
> (unset DISTUTILS_DEBUG) >/dev/null 2>&1 && unset DISTUTILS_DEBUG
>
> Though Icarus' version looks simpler in this case.

You could also do

${DISTUTILS_DEBUG+unset DISTUTILS_DEBUG}

which will not work in the Bourne shell and depends on $IFS in
zsh in sh emulation.

eval "${DISTUTILS_DEBUG+unset DISTUTILS_DEBUG}"

should work though.

--
St�phane
From: OldSchool on 15 Dec 2009 15:22
On Dec 14, 5:01 pm, Dave <f...(a)coo.com> wrote:

> Stephane CHAZELAS wrote:
> > 2009-12-14, 17:05(+00), Dave:

> > That was fixed in bash-2.05b-beta1. 2.05b was released in 2002.
> > The latest version of bash is 4.0.35. You may want to consider
> > upgrading.
>
> I could easily upgrade - in fact, there is a later version someone else built on
> the machine.
>
> But it does no harm to find out issues that arise as a result of using older
> versions of software. The release of HP-UX is quite old, but it is the latest
> which will work on the PA-RISC processor. The newer releases only work on Itanium.
>
From: OldSchool on 15 Dec 2009 15:25
On Dec 15, 3:22 pm, OldSchool <scott.my...(a)macys.com> wrote:
> On Dec 14, 5:01 pm, Dave <f...(a)coo.com> wrote:
>
>
>
> > Stephane CHAZELAS wrote:
> > > 2009-12-14, 17:05(+00), Dave:
> > > That was fixed in bash-2.05b-beta1. 2.05b was released in 2002.
> > > The latest version of bash is 4.0.35. You may want to consider
> > > upgrading.
>
> > I could easily upgrade - in fact, there is a later version someone else built on
> > the machine.
>
> > But it does no harm to find out issues that arise as a result of using older
> > versions of software. The release of HP-UX is quite old, but it is the latest
> > which will work on the PA-RISC processor. The newer releases only work on Itanium.- Hide quoted text -
>
> - Show quoted text -

didn't mean to send the previous.....

I don't know if you missed the point, but its NOT related to the
release of HPUX. Its the release of bash, which is a totally separate
animal. You should be able to build the latest from source if you
can't scrounge up a pre-built binary.
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