-d test stops working

Hello,=0AI made a program that traverses a directory listing all the files =
in it and in it's sub directories.. root@pacman:/home# cat list_dir=0A=
=0A#!/usr/bin/perl -w use 5.010; use strict; =0A=
sub list_dir { say "Entring directory $_[0]"; chdir $_[0]=
or die "$_[0]: $!\n"; chomp(my $pwd =3D `pwd`)=
; foreach my $entry (glob "*") { if (-d $entry) {=0A=
=0A list_dir($entry); # Do not work without () }=
else { say "$pwd/$entry"; } } =
say "Leaving directory $_[0]"; } list_dir $ARGV[0];=0A--=0A=
=0ABut it appears to break in the -d test of the subdirectory 'linux':=0A=
=0Aroot@pacman:/home# /bin/ls -l tessio2/Books total 10744 -rw-r-=
-r-- 1 root root 2412061 2011-02-16 21:14 802.1Q-2005.pdf -rw-r--r-- 1=
root root 273110 2011-02-16 21:14 Artigo_SNMP.pdf drwxr-xr-x 4 root =
root 4096 2011-02-16 21:14 ASAP -rw-r--r-- 1 root root 5016115 2011=
-02-16 21:14 BSD_and_LINUX_09_2010_.pdf -rw-r--r-- 1 root root 356148=
2011-02-16 21:14 crash-course.pdf -rw-r--r-- 1 root root 266236 2011=
-02-16 21:14 frutas_na_alimentacao.pdf drwxr-xr-x 2 root root 4096 =
2011-02-16 21:14 linux -rw-r--r-- 1 root root 2605022 2011-02-16 21:14=
Milan Kundera - a insustent?vel leveza do ser.pdf -rw-r--r-- 1 root r=
oot 52717 2011-02-16 21:14 opencon06-culture.pdf drwxr-xr-x 9 root r=
oot 4096 2011-02-16 21:14 Perl drwxr-xr-x 2 root root 4096 2011-=
02-16 21:14 TMP=0A-- Here is the program output (note that it stops en=
tering directories after it leaves ASAP): root@pacman:/home# perl list=
_dir tessio2 Entring directory tessio2 /home/tessio2/bookmarks-20=
11-02-16.json Entring directory Books /home/tessio2/Books/802.1Q-=
2005.pdf /home/tessio2/Books/Artigo_SNMP.pdf Entri ng directory AS=
AP Entring directory Dic /home/tessio2/Books/ASAP/Dic/01.txt=0A=
=0A/home/tessio2/Books/ASAP/Dic/pre.txt Leaving directory Dic /ho=
me/tessio2/Books/ASAP/Distc Leaving directory ASAP /home/tessio2/=
Books/BSD_and_LINUX_09_2010_.pdf /home/tessio2/Books/cr ash-course.pdf=
/home/tessio2/Books/frutas_na_alimentacao.pdf /ho me/tessio2/Book=
s/linux=0A =0A/home/tessio2/Books/Milan Kundera - a insustent=E1vel levez=
a do ser.pdf /home/tessio2/Books/opencon06-culture.pdf /home/tess=
io2/Books/Perl /home/tessio2/Books/TMP Leaving directory Books=0A=
=0A/home/tessio2/commands /home/tessio2/concurso.pdf=0A =0A/home/tessio=
2/Desktop /home/tessio2/Documents /home/tessio2/Do wnloads /h=
ome/tessio2/examples.desktop /home/tessio2/Music / home/tessio2/pe=
rlish /home/tessio2/Pictures /home/tessio2/Public= 0A=0A/home/tess=
io2/Templates /home/tessio2/tj-apt /home/tessio2/t j-net /hom=
e/tessio2/Videos Leaving directory tessio2=0A-- Why the -d test o=
f subdirectory 'linux' (and posterior directories) don't work?=0AThanks for=
your time! =0A

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Re: -d test stops working

I just found the bug..=0A--=0A#!/usr/bin/perl -w use 5.010;=0Ause stri=
ct; =0Asub list_dir { my ($dir) =3D @_; chdir $dir or die "$=
dir: $!\n"; =09chomp(my $pwd =3D `pwd`); say "$pwd/"; =09for=
each my $entry (glob "*") { =09# if entry is a directory, call list_di=
r on it =09if (-d $entry) { list_dir($entry);=09# Do not wo=
rk without "()" =09} else { say "$pwd/$entry"; =09}=0A=
=09} chdir ".." or die "..: $!\n";=0A} # main program=0Adie "$0: =
missing operand\n" if @ARGV < 1; foreach (@ARGV) { list_dir $_;=
=0A}=0A-- 'chdir ".." or die "..: $!\n"' is the bug fix.. :) > As=
sunto: -d test stops working=0A> Para: beginners@perl.org=0A> Data: Quinta-=
feira, 17 de Fevereiro de 2011, 14:56=0A> Hello,=0A> I made a program that =
traverses a directory listing all the=0A> files in it and in it's sub direc=
tories..=0A> =0A> root@pacman:/home# cat list_dir=0A> =0A> #!/usr/bin/perl =
-w=0A> =0A> =0A> =0A> use 5.010;=0A> =0A> use strict;=0A> =0A> =0A> =0A> =
=0A> sub list_dir {=0A> =0A> =A0 =A0 say "Entring directory $_[0]";=0A> =0A=
> =A0 =A0 chdir $_[0]=0A> =0A> =A0 =A0 =A0 =A0 or die "$_[0]: $!\n";=0A> =
=0A> =0A> =0A> =A0 =A0 chomp(my $pwd =3D `pwd`);=0A> =0A> =A0 =A0 foreach m=
y $entry (glob "*") {=0A> =0A> =A0 =A0 =A0 =A0 if (-d $entry) {=0A> =0A> =
=A0 =A0 =A0 =A0 =A0   > list_dir($entry);=A0 =A0 # Do not work without =
()=0A> =0A> =A0 =A0 =A0 =A0 } else {=0A> =0A> =A0 =A0 =A0 =A0 =A0 =A0 say=
=0A> "$pwd/$entry";=0A> =0A> =A0 =A0 =A0 =A0 }=0A> =0A> =A0 =A0 }=0A> =0A> =
=A0 =A0 say "Leaving directory $_[0]";=0A> =0A> }=0A> =0A> list_dir $ARGV[0=
];=0A> --=0A> =0A> But it appears to break in the -d test of the subdirecto=
ry=0A> 'linux':=0A> =0A> root@pacman:/home# /bin/ls -l tessio2/Books=0A> =
=0A> total 10744=0A> =0A> -rw-r--r-- 1 root root 2412061 2011-02-16 21:14=
=0A> 802.1Q-2005.pdf=0A> =0A> -rw-r--r-- 1 root root=A0 273110 2011-02-16 2=
1:14=0A> Artigo_SNMP.pdf=0A> =0A> drwxr-xr-x 4 root root=A0 =A0 4096 2011-0=
2-16 21:14=0A> ASAP=0A> =0A> -rw-r--r-- 1 root root 5016115 2011-02-16 21:1=
4=0A> BSD_and_LINUX_09_2010_.pdf=0A> =0A> -rw-r--r-- 1 root root=A0 356148 =
2011-02-16 21:14=0A> crash-course.pdf=0A> =0A> -rw-r--r-- 1 root root=A0 26=
6236 2011-02-16 21:14=0A> frutas_na_alimentacao.pdf=0A> =0A> drwxr-xr-x 2 r=
oot root=A0 =A0 4096 2011-02-16 21:14=0A> linux=0A> =0A> -rw-r--r-- 1 root =
root 2605022 2011-02-16 21:14 Milan=0A> Kundera - a insustent?vel leveza do=
ser.pdf=0A> =0A> -rw-r--r-- 1 root root  =A052717 2011-02-16=0A> 21:14=
opencon06-culture.pdf=0A> =0A> drwxr-xr-x 9 root root=A0 =A0 4096 2011-02-=
16 21:14=0A> Perl=0A> =0A> drwxr-xr-x 2 root root=A0 =A0 4096 2011-02-16 21=
:14=0A> TMP=0A> --=0A> =0A> Here is the program output (note that it stops =
entering=0A> directories after it leaves ASAP):=0A> =0A> root@pacman:/home#=
perl list_dir tessio2=0A> =0A> Entring directory tessio2=0A> =0A> /home/te=
ssio2/bookmarks-2011-02-16.json=0A> =0A> Entring directory Books=0A> =0A> /=
home/tessio2/Books/802.1Q-2005.pdf=0A> =0A> /home/tessio2/Books/Artigo_SNMP=
..pdf=0A> =0A> Entring directory ASAP=0A> =0A> Entring directory Dic=0A> =0A=
> /home/tessio2/Books/ASAP/Dic/01.txt=0A> =0A> /home/tessio2/Books/ASAP/Dic=
/pre.txt=0A> =0A> Leaving directory Dic=0A> =0A> /home/tessio2/Books/ASAP/D=
istc=0A> =0A> Leaving directory ASAP=0A> =0A> /home/tessio2/Books/BSD_and_L=
INUX_09_2010_.pdf=0A> =0A> /home/tessio2/Books/crash-course.pdf=0A> =0A> /h=
ome/tessio2/Books/frutas_na_alimentacao.pdf=0A> =0A> /home/tessio2/Books/li=
nux=0A>     > /home/tessio2/Books/Milan Kundera - a insustent=E1vel=
leveza=0A> do ser.pdf=0A> =0A> /home/tessio2/Books/opencon06-culture.pdf=
=0A> =0A> /home/tessio2/Books/Perl=0A> =0A> /home/tessio2/Books/TMP=0A> =0A=
> Leaving directory Books=0A> =0A> /home/tessio2/commands=0A> =0A> /home/te=
ssio2/concurso.pdf=0A> =0A> /home/tessio2/Desktop=0A> =0A> /home/tessio2/Do=
cuments=0A> =0A> /home/tessio2/Downloads=0A> =0A> /home/tessio2/examples.de=
sktop=0A> =0A> /home/tessio2/Music=0A> =0A> /home/tessio2/perlish=0A> =0A> =
/home/tessio2/Pictures=0A> =0A> /home/tessio2/Public=0A> =0A> /home/tessio2=
/Templates=0A> =0A> /home/tessio2/tj-apt=0A> =0A> /home/tessio2/tj-net=0A> =
=0A> /home/tessio2/Videos=0A> =0A> Leaving directory tessio2=0A> --=0A> =0A=
> Why the -d test of subdirectory 'linux' (and posterior=0A> directories) d=
on't work?=0A> Thanks for your time!=0A> =0A> =0A> =0A> =0A

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Re: -d test stops working

On 11-02-17 08:34 PM, Téssio Fechine wrote:
> I just found the bug..

If you're traversing directories, you should use File::Find. It's a
standard module that is installed with Perl. See `perldoc File::Find`
for details.

Also, to get a list of the standard modules and pragmatics:
perldoc perlmodlib


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