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Joined: Apr 2001
Posts: 8
Junior Member
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Junior Member
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Ok heres the deal, I am trying to parse the 'LIST' output of any unix directory. A file entry goes something like this: drwx------ 5 anpatel students 512 Jan 13 2000 Desktop Simple way of getting each field is: my @properties = split(/s+/,$line); But this code has one specific flaw. What if the file was "New Text Document.txt", there would be no way saying that $properties[9] was the full name of the file. I thought of improving the code: my @properties = split( /s+/, $item ); my ( $perms, $lCount, $owner, $group, $size, $mod_mon, $mod_date, $mod_time ) = @properties; my $file = join( "", @properties[8.. $#properties] ); But $file will be "NewTextDocument.txt" because the &join will compine all the rest of array elements with "". I was looking for a perfect solution if some one could offer, of-course i am on the hunt. But lets see if some one figures out before me  hehehe Thanks for reading this!
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Joined: Sep 2000
Posts: 755
P.I.T.A. / Programmer
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P.I.T.A. / Programmer
Joined: Sep 2000
Posts: 755 |
do you need all of the properties, or just a list of filenames?
"Annnnnnnndd now, opening for Iron Maiden...... WYLD STALLYNS!!!" --Bill S. Preston, Esquire and Ted "Theodore " Logan
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Joined: Apr 2001
Posts: 8
Junior Member
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Junior Member
Joined: Apr 2001
Posts: 8 |
Basically i need all the properties, but to be exact i need:
if the file is directory ($perms, $properties[0])
File Size ($size, $properties[4])
File Mod Time ( none, $properties[5... 7] )
File name ($file, $properties[8..*])
hmm i think you are suggesting me to use the simple 'ls' command, and find all the file names easily from that, I had this in mind, but dont want to use it (for many reasons)
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Joined: Apr 2001
Posts: 8
Junior Member
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Junior Member
Joined: Apr 2001
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hmm.. if we might locate somehow with Regexps, the char number of where the file name starts than bingo!.
But sadly i am still trying to find that way out.
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Joined: Aug 2000
Posts: 335
Member
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Member
Joined: Aug 2000
Posts: 335 |
Instead of trying to parse the text output of a Unix command, I'd recommend using readdir to scan through the files, and stat to get the file properties.
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Joined: Apr 2001
Posts: 8
Junior Member
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Junior Member
Joined: Apr 2001
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Thanks, but I am trying to parse the FTP list output, there is no way of readdir() in a FTP client, however there is a ftp->ls() command, that gives you only file name output, but there are no specific ways to merge that information to the ftp->dir() output.
The only choice that is left now is to effectively parse the LIST output.
Thanks for replying!
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Joined: Apr 2001
Posts: 8
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Junior Member
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I did it!!!, i figured out that since we know at what field we need to stop, we just eliminate the fields before what we want. Sorry for bothering ya'all
my $str = "drwx------ 3 anpatel students 512 Apr 18 14:45 Really Bad Name Name for a file.";
$str =~ s/Ss+//; #1 perms-links
$str =~ s/Ss+//; #2 links-user
$str =~ s/Ss+//; #3 user-grp
$str =~ s/Ss+//; #4 grp-apr
$str =~ s/Ss+//; #5 apr-date
$str =~ s/Ss+//; #6 date-time
$str =~ s/Ss+//; #7 time-filename
$str =~ s/^(S+)s+(.*)/$2/; # remove all the things that were combined previously. result is we get the file name!
print $str;
exit;
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Joined: Mar 2000
Posts: 21,079 Likes: 3
I type Like navaho
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I type Like navaho
Joined: Mar 2000
Posts: 21,079 Likes: 3 |
Originally posted by Dave_L:
Instead of trying to parse the text output of a Unix command, I'd recommend using readdir to scan through the files, and stat to get the file properties.
How would stat be used after you've read the directory and would like to read/print file names, date, and size?
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Joined: Mar 2000
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I type Like navaho
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Joined: May 2000
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Addict
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so, you no longer have a question? 
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Joined: Mar 2000
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I type Like navaho
Joined: Mar 2000
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Still have questions, but that at least tells me the reasoning behind the answer I can probably write it using the example posted, I'll write back when I have questions. Basically we readdir then use stat to be able to print the file size ($size) and date ($mtime). $filename gives me the file's name? Would something like this be in the right direction? use File::stat;
($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size, $atime,$mtime,$ctime,$blksize,$blocks) = stat($filename); then use $filename, $mtime, and $size for the data I'm looking for?
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Joined: May 2000
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Addict
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Addict
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File::stat gives you a by-name access to stat() values (actually it returns an object). If you'll not use them, just use the CORE stat function (which returns an array)... Else, something like this will work: my @files = <*.txt>; # all txt in current dir
my $stat;
foreach my $file (@files) {
$stat = stat $file or die "Error: $!";
printf "%st%st%sn", $file, format_size($stat->size), format_time($stat->mtime);
}
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Joined: Mar 2000
Posts: 21,079 Likes: 3
I type Like navaho
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I type Like navaho
Joined: Mar 2000
Posts: 21,079 Likes: 3 |
thank you, that should do it So in the final print line $file will give me the filename?
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Joined: May 2000
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Addict
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yes $file includes file name or full path to the file... depending on your usage...
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Joined: Mar 2000
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I type Like navaho
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I type Like navaho
Joined: Mar 2000
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How does this look? opendir(UPLOADS, "$opt{dir}/$user_number");
my @uploads = readdir(UPLOADS);
closedir(UPLOADS);
my @files = <*.txt>; # all txt in current dir
my $stat;
foreach my $file (@files) {
$stat = stat $file or die "Error: $!";
##output it
print qq(
<tr valign="top">
<td bgcolor="$vars_style{AltColumnColor2}" align="center" width="20"><input type="checkbox" name="$key" value="include" checked="checked" /></td>
<td bgcolor="$vars_style{AltColumnColor2}"><b><font size="$vars_style{FDTextSize}">$filename</font></b></td>
<td bgcolor="$vars_style{AltColumnColor2}" align="center" valign="middle">$size</td>
<td bgcolor="$vars_style{AltColumnColor2}" align="center" valign="middle">$mtime</td>
</tr>
);
}It's not throwing an error, but then it's not reading/printing anything either  How would I fix the section to view all files, not just .txt? Thank you again for your time
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Joined: May 2000
Posts: 1,356
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Posts: 1,356 |
txt one was an example (or demo) on the usage use this: opendir(UPLOADS, "$opt{dir}/$user_number") or die "Can not opendir($opt{dir}/$user_number): $!";
my @uploads = readdir(UPLOADS);
closedir(UPLOADS);
my($size, $mtime);
foreach my $filename (@uploads) {
next if $filename =~ /^./; # ignore anything that starts with a dot. like "." ".." ".htaccess"
($size, $mtime) = (stat "$opt{dir}/$user_number/$filename")[7,9] or die "Error: $!";
##output it
print qq(
<tr valign="top">
<td bgcolor="$vars_style{AltColumnColor2}" align="center" width="20"><input type="checkbox" name="$key" value="include" checked="checked" /></td>
<td bgcolor="$vars_style{AltColumnColor2}"><b><font size="$vars_style{FDTextSize}">$filename</font></b></td>
<td bgcolor="$vars_style{AltColumnColor2}" align="center" valign="middle">$size</td>
<td bgcolor="$vars_style{AltColumnColor2}" align="center" valign="middle">$mtime</td>
</tr>
);
}it is always better to see the actual code
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Joined: Mar 2000
Posts: 21,079 Likes: 3
I type Like navaho
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I type Like navaho
Joined: Mar 2000
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Joined: May 2000
Posts: 1,356
Addict
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Addict
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Posts: 1,356 |
no problem... but you need to swap "Date:" "Size:" texts and... I can give you a byte converter sub fsize {
my $size = shift or return '0 byte';
return sprintf("%1.2f %s",$size / 1024 / 1024 / 1024, " GB" ) if($size >= 1024*1024*1024);
return sprintf("%1.2f %s",$size / 1024 / 1024 , " MB" ) if($size >= 1024*1024 );
return sprintf("%1.2f %s",$size / 1024 , " KB" ) if($size >= 1024 );
return sprintf("%1.2f %s",$size , " Byte") if($size < 1024 );
return "$size Byte";
}so, you can use it like: opendir(UPLOADS, "$opt{dir}/$user_number") or die "Can not opendir($opt{dir}/$user_number): $!";
my @uploads = readdir(UPLOADS);
closedir(UPLOADS);
my($size, $mtime);
foreach my $filename (@uploads) {
next if $filename =~ /^./; # ignore anything that starts with a dot. like "." ".." ".htaccess"
next if -d "$opt{dir}/$user_number/$filename"; # ignore directories
($size, $mtime) = (stat "$opt{dir}/$user_number/$filename")[7,9] or die "Error: $!";
##output it
$size = fsize($size);
print qq(
<tr valign="top">
<td bgcolor="$vars_style{AltColumnColor2}" align="center" width="20"><input type="checkbox" name="$key" value="include" checked="checked" /></td>
<td bgcolor="$vars_style{AltColumnColor2}"><b><font size="$vars_style{FDTextSize}">$filename</font></b></td>
<td bgcolor="$vars_style{AltColumnColor2}" align="center" valign="middle">$size</td>
<td bgcolor="$vars_style{AltColumnColor2}" align="center" valign="middle">$mtime</td>
</tr>
);
}
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Joined: May 2000
Posts: 1,356
Addict
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Addict
Joined: May 2000
Posts: 1,356 |
hey! I've just noticed the cake!  Happy Birthday! 
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Joined: Mar 2000
Posts: 21,079 Likes: 3
I type Like navaho
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I type Like navaho
Joined: Mar 2000
Posts: 21,079 Likes: 3 |
grazi, I'm not getting older, I'm getting... well, ok, I'm getting older
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Joined: Sep 2005
Posts: 1
Junior Member
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Junior Member
Joined: Sep 2005
Posts: 1 |
May be this looks a bit more appropriate
my $str = "drwx------ 3 anpatel students 512 Apr 18 14:45 Really Bad Name Name for a file.";
$str =~ s/(S)s/$1/; #1 perms-links
$str =~ s/(S)s/$1/; #2 links-user
$str =~ s/(S)s/$1/; #3 user-grp
$str =~ s/(S)s/$1/; #4 grp-apr
$str =~ s/(S)s/$1/; #5 apr-date
$str =~ s/(S)s/$1/; #6 date-time
$str =~ s/(S)s/$1/; #7 time-filename
$str =~ s/^(S+)s+(.*)/$2/; # remove all the things that were combined previously. result is we get the file name!
print $str,"n";
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