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How to rename to lowercase every file in a directory and its subdirectories?

by JoeCool (Novice)
on Dec 14, 2001 at 05:08 UTC ( #131861=categorized question: print w/replies, xml ) Need Help??
Contributed by JoeCool on Dec 14, 2001 at 05:08 UTC
Q&A  > directories


I recently D/L a bunch of file and instead of renaming every file in the directory and sub directory manually. I have tried to input a dir and rename all files in that and sub to lc... Please Advise, Joe

Answer: How do u rename every file in a dir and sub?
contributed by rob_au

This code performs this task for you - It makes use of File::Find to find entries within the given path, ensures that they are actually files (stat and -f _) and then renames them. This could be made more precise by added exclusion matches. eg. return unless (m/\.mp3$/);

#!d:/perl/bin/perl -w use File::Find; use strict; find ({ 'wanted' => \&renamefile, }, '/path/to/sub/directory'); sub renamefile { my ($dev, $ino, $mode, $nlink, $uid, $gid); return unless (($dev, $ino, $mode, $nlink, $uid, $gid) = lstat($_) +); return unless (-f _); rename $_, lc($_); }
Answer: How do u rename every file in a dir and sub?
contributed by robin

If you're using a Unix system (e.g. Linux or Solaris) then the easiest way is not entirely Perl, but uses the find command to get the filenames, and Perl for the actual renaming:

find . -type f -exec \ perl -e 'rename($_, lc) || warn "$_: $!\n" for @ARGV' {} \;

That turns all the filenames in the current directory and below to lower case. If you're using a system which doesn't have the find command, you can use the find2perl utility (it comes with Perl) to generate a Perl script which will behave the same way. On Windows you can type:

find2perl . -type f -eval "rename $_, lc or warn qq{$_: $!\n}"

and then run the script that it outputs.

Answer: How do u rename every file in a dir and sub?
contributed by JPaul

One way to do it would be something like this:

#!/usr/bin/perl -w use strict; # Open 'find' process to list files recursively with paths open(FIND, "find |"); while(<FIND>) { chomp; next if $_ eq $0; # Don't rename ourself rename($_, lc($_)); } close(FIND);
It's not remarkably efficient, but it'll do your bidding.


Answer: How to rename to lowercase every file in a directory and its subdirectories?
contributed by Alex the Serb

you have to use recursion, because you dont know how much deep all subdirectories goes

#!/usr/bin/perl -w use strict; my $path_to_dir = shift; dir("$path_to_dir"); sub dir { opendir(DIR,"$_[0]"); my @list_of_files = readdir(DIR); foreach(@list_of_files) { if($_ ne "." && $_ ne "..") { if(-d "$_[0]/$_") { dir("$_[0]/$_"); } else { rename "$_[0]/$_","$_[0]/"."\L$_"; } } } }

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