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Subject Author Date
using bare perl to run Unix passwd smcracraft 02-04-2008
Posted by smcracraft on February 4, 2008, 10:42 pm
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 Hi,

Anyone know of a Perl program that can
run Unix passwd and set a particular password
for a particular user?

I don't want to have to edit the passwd or shadow
files and want to use the built-in-passwd.

The two caveats on this is: no Expect allowed and
also no Perl libraries other than the standard ones.

Also, this is not on Windows but on Unix.

Thanks anybody/everybody.

Posted by Pat Deegan on February 5, 2008, 12:12 am
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 Greets,

On Mon, 04 Feb 2008 19:42:38 -0800, smcracraft wrote:

> Hi,
>
> Anyone know of a Perl program that can run Unix passwd and set a
> particular password for a particular user?

On my system at least, `passwd` has a --stdin option:
        "This option is used to indicate that passwd should
        read the new password from standard input,
        which can be a pipe."

So opening a pipe to '| passwd --stdin username' should work.

HTH,
Pat D

Posted by smcracraft on February 5, 2008, 12:53 am
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passwd does not have a --stdin on most vendor Unixes because
it is considered a security flaw.

I should have been more specific to exclude the above "--stdin"
from the requirement.

> Greets,
>
> On Mon, 04 Feb 2008 19:42:38 -0800,smcracraftwrote:
> > Hi,
>
> > Anyone know of aPerlprogram that can run Unix passwd and set a
> > particular password for a particular user?
>
> On my system at least, `passwd` has a --stdin option:
> "This option is used to indicate that passwd should
> read the new password from standard input,
> which can be a pipe."
>
> So opening a pipe to '| passwd --stdin username' should work.
>
> HTH,
> Pat D


Posted by John W. Krahn on February 5, 2008, 1:15 am
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smcracraft wrote:
>
> Anyone know of a Perl program that can
> run Unix passwd and set a particular password
> for a particular user?
>
> I don't want to have to edit the passwd or shadow
> files and want to use the built-in-passwd.
>
> The two caveats on this is: no Expect allowed and
> also no Perl libraries other than the standard ones.
>
> Also, this is not on Windows but on Unix.

http://groups.google.com/group/comp.lang.perl.misc/browse_thread/thread/3de7596861d102be/39fa3c167101fcae?lnk=st&q=#39fa3c167101fcae


John
--
Perl isn't a toolbox, but a small machine shop where you
can special-order certain sorts of tools at low cost and
in short order. -- Larry Wall

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