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Parsing problem
Joined: 07 May 2004
Posts: 7
Parsing problem
The following code is parsing out the /etc/shadow file and should
print the second column but for some reason it`s printing the third.
#!/usr/local/bin/perl -w
$SHADOW="/etc/shadow";
open (SH,$SHADOW) || die "Cannot open file";
while (<SH>) {
chomp;
(my $password) = (split /:/) [2];
print "$password
";
}
close(SH);
Any suggestions?
Joined: 21 May 2004
Posts: 44
Parsing problem
>>>>> "perl" == perl 1978 <no_reply@yahoogroups.com> writes:
perl> The following code is parsing out the /etc/shadow file and should
perl> print the second column but for some reason it`s printing the third.
perl> (my $password) = (split /:/) [2];
perl> print "$password
";
Precisely.
0 1 2
2 is the third column.
--
Randal L. Schwartz - Stonehenge Consulting Services, Inc. - +1 503 777 0095
<merlyn@...> <URL:http://www.stonehenge.com/merlyn/>
Perl/Unix/security consulting, Technical writing, Comedy, etc. etc.
See PerlTraining.Stonehenge.com for onsite and open-enrollment Perl training!
Joined: 23 Aug 2004
Posts: 1
Parsing problem
Greetings,
The split function creates an array, which begins at zero [0];
therefore, you are accessing the 3rd element of the array. Try this
instead:
(my $password) = (split /:/) [1];
--- In perl_official@yahoogroups.com, perl_1978 <no_reply@y...> wrote:
> The following code is parsing out the /etc/shadow file and should
> print the second column but for some reason it`s printing the third.
>
> (my $password) = (split /:/) [2];
Joined: 07 May 2004
Posts: 7
Parsing problem
Thanks merlynstonehengecom and kchima01 it`s fixed now.
--- In perl_official@yahoogroups.com, kchima01 <no_reply@y...> wrote:
> Greetings,
>
> The split function creates an array, which begins at zero [0];
> therefore, you are accessing the 3rd element of the array. Try
this
> instead:
>
> (my $password) = (split /:/) [1];
>
> --- In perl_official@yahoogroups.com, perl_1978 <no_reply@y...>
wrote:
> > The following code is parsing out the /etc/shadow file and should
> > print the second column but for some reason it`s printing the
third.
> >
> > (my $password) = (split /:/) [2];
Joined: 02 Sep 2004
Posts: 4
Parsing problem
hi people
i have a small problem....
i would like to know how to create 2 dimensional
arrays in perl...i`m not able to find this in any of
the perl books.....
Any good links or tutorials regarding this are
welcomed...
thanks in advance....
Rgds
Harish.
=====
HARISH.S
__________________________________
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Joined: 21 May 2004
Posts: 44
Parsing problem
>>>>> "harish" == harish sundararaj <harish85_bt@...> writes:
harish> i have a small problem....
harish> i would like to know how to create 2 dimensional
harish> arrays in perl...
Perl doesn`t have formal two-dimensional arrays. It has arrays that
can contain arrayrefs, but all dereferencing is explicit, and so you
must maintain awareness of this fact while programming.
harish> i`m not able to find this in any of
harish> the perl books.....
You haven`t read either "Learning Perl Objects References and Modules"
(the "volume 2" of the "Learning Perl" series) or "Programming Perl"
then.
harish> Any good links or tutorials regarding this are
harish> welcomed...
"perldoc perlreftut" might be a good start. Or google my 200+ online
columns with
site:stonehenge.com references
--
Randal L. Schwartz - Stonehenge Consulting Services, Inc. - +1 503 777 0095
<merlyn@...> <URL:http://www.stonehenge.com/merlyn/>
Perl/Unix/security consulting, Technical writing, Comedy, etc. etc.
See PerlTraining.Stonehenge.com for onsite and open-enrollment Perl training!
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