Checking for a directory
Hi All, Just trying to work out the code to test if a path is a directory or file. Looked over the stat function but doesn't quite seem right. Can someone give me a clue thanks Rus -- www: http://jvds.com | Virtual Servers from just $15/mo MSNM: [EMAIL PROTECTED] | Totally Customizable Technology e: [EMAIL PROTECTED] | FreeBSD Linux 10% donation to FreeBSD.org on each purchase -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Checking for a directory
Example Name Result
-e $a ExistsTrue if file named in $a exists
-r $a Readable True if file named in $a is readable
-w $a Writable True if file named in $a is writable
-d $a Directory True if file named in $a is a directory
-f $a File True if file named in $a is a regular file
-T $a Text File True if file named in $a is a text file
so:
if (-d $filename) {
print '$filename$ is a directory\n;
}
-Original Message-
From: Rus Foster [mailto:[EMAIL PROTECTED]
Sent: Thursday, July 24, 2003 2:39 PM
To: [EMAIL PROTECTED]
Subject: Checking for a directory
Hi All,
Just trying to work out the code to test if a path is a directory or file.
Looked over the stat function but doesn't quite seem right. Can someone
give me a clue
thanks
Rus
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Re: Checking for a directory
if ( -d $path ) { print Directory }
elsif ( -f $path ) { print File }
else { print Not exist }
HTH
- Original Message -
From: Rus Foster [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Thursday, July 24, 2003 8:39 PM
Subject: Checking for a directory
Hi All,
Just trying to work out the code to test if a path is a directory or file.
Looked over the stat function but doesn't quite seem right. Can someone
give me a clue
thanks
Rus
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RE: Checking for a directory
-d $dir #if true than is a dir -f $file #if true than is a regulare file -Original Message- From: Rus Foster [mailto:[EMAIL PROTECTED] Sent: Thursday, July 24, 2003 8:39 AM To: [EMAIL PROTECTED] Subject: Checking for a directory Hi All, Just trying to work out the code to test if a path is a directory or file. Looked over the stat function but doesn't quite seem right. Can someone give me a clue thanks Rus -- www: http://jvds.com | Virtual Servers from just $15/mo MSNM: [EMAIL PROTECTED] | Totally Customizable Technology e: [EMAIL PROTECTED] | FreeBSD Linux 10% donation to FreeBSD.org on each purchase -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Checking for a directory
Hi All,
Just trying to work out the code to test if a path is a
directory or file. Looked over the stat function but doesn't
quite seem right. Can someone give me a clue
Sure thing:
if(-d $path) { print $path is adirectory; }
perldoc -f -d to find out more about file tests
HTH
Dmuey
thanks
Rus
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Re: Checking for a directory
On Thu, 24 Jul 2003 23:00:17 +0800, LI NGOK LAM [EMAIL PROTECTED] wrote:
if ( -d $path ) { print Directory }
elsif ( -f $path ) { print File }
else { print Not exist }
Not exist is misleading, just because a file is not a 'plain' file or a 'directory'
does *NOT* indicate non-existence. Existence should be checked explicitly with the -e
operator.
http://danconia.org
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Re: Checking for a directory
Yep ! =)
Even though I can't imagine what a path is not file or directory would imply
more then not exist. But I agree to check the existence for a path by -e
is the safest operation.
- Original Message -
From: [EMAIL PROTECTED]
To: LI NGOK LAM [EMAIL PROTECTED]; Rus Foster [EMAIL PROTECTED];
[EMAIL PROTECTED]
Sent: Thursday, July 24, 2003 11:06 PM
Subject: Re: Checking for a directory
On Thu, 24 Jul 2003 23:00:17 +0800, LI NGOK LAM [EMAIL PROTECTED] wrote:
if ( -d $path ) { print Directory }
elsif ( -f $path ) { print File }
else { print Not exist }
Not exist is misleading, just because a file is not a 'plain' file or a
'directory' does *NOT* indicate non-existence. Existence should be checked
explicitly with the -e operator.
http://danconia.org
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Re: Checking for a directory
On Thu, 24 Jul 2003, LI NGOK LAM wrote:
if ( -d $path ) { print Directory }
elsif ( -f $path ) { print File }
else { print Not exist }
HTH
Cheers all. Think I was trying to be to clever for my own good
RGds
]Rus
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Re: Checking for a directory
On Thu, 24 Jul 2003 23:20:20 +0800, LI NGOK LAM [EMAIL PROTECTED] wrote:
Yep ! =)
Even though I can't imagine what a path is not file or directory would imply
more then not exist. But I agree to check the existence for a path by -e
is the safest operation.
Since you asked ;-) from perldoc -f -e
-l File is a symbolic link.
-p File is a named pipe (FIFO), or Filehandle is a pipe.
-S File is a socket.
-b File is a block special file.
-c File is a character special file.
-f implies that a file is 'plain' aka not really special in any way. Files come in
many different flavors not only based on their contents, though this is largely system
dependent. Most windows and old Mac OS users will go their whole life not knowing
about these (I said not knowing about and most, not that they don't exist there,
personally I am not sure they do or don't, but then I don't much care either :-) )...
If you have access to a fairly standard unix system try:
perl -e 'if (-f /dev/tty0) { print File is plain.\n; } else { if (-e /dev/tty0)
{ print File is not plain, but does exist.\n } }'
The issue was not with whether -f will tell you of non-existence, because it will, but
by using your 'else' block you were implying non-existence by not being a plain file
and not a directory, which is an incorrect (strictly speaking) implication.
http://danconia.org
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Re: Checking for a directory
Thanks for this great lesson, I will take account for this on my furture =))
- Original Message -
From: [EMAIL PROTECTED]
To: LI NGOK LAM [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Sent: Friday, July 25, 2003 12:17 AM
Subject: Re: Checking for a directory
On Thu, 24 Jul 2003 23:20:20 +0800, LI NGOK LAM [EMAIL PROTECTED] wrote:
Yep ! =)
Even though I can't imagine what a path is not file or directory would
imply
more then not exist. But I agree to check the existence for a path by -e
is the safest operation.
Since you asked ;-) from perldoc -f -e
-l File is a symbolic link.
-p File is a named pipe (FIFO), or Filehandle is a pipe.
-S File is a socket.
-b File is a block special file.
-c File is a character special file.
-f implies that a file is 'plain' aka not really special in any way. Files
come in many different flavors not only based on their contents, though this
is largely system dependent. Most windows and old Mac OS users will go their
whole life not knowing about these (I said not knowing about and most,
not that they don't exist there, personally I am not sure they do or don't,
but then I don't much care either :-) )...
If you have access to a fairly standard unix system try:
perl -e 'if (-f /dev/tty0) { print File is plain.\n; } else { if (-e
/dev/tty0) { print File is not plain, but does exist.\n } }'
The issue was not with whether -f will tell you of non-existence, because
it will, but by using your 'else' block you were implying non-existence by
not being a plain file and not a directory, which is an incorrect (strictly
speaking) implication.
http://danconia.org
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