12-07-2009
Changing file names with AWK
Dear All,
I have some thousands of files in a folder and i need to change those file names without opening the file (no need to change anything in the file content, need to change the file name only). The filenames are as follows:
Myfile_name.1_parameter
Myfile_name.2_parameter
Myfile_name.3_parameter
.
.
.
.
Myfile_name.100_parameter
.
.
.
.
.
.
Myfile_name.1000_parameter
.
.
.
.
..
Myfile_name.2000_parameter...and so on.
For other calculation, i need to take these files one by one and do the calculations. But these files are arranged in the following manner (OS-Linux):
Myfile_name.10_parameter
Myfile_name.11_parameter
Myfile_name.12_parameter
.
.
.
Myfile_name.100_parameter
Myfile_name.101_parameter
Myfile_name.102_parameter
.
.
.
Myfile_name.1000_parameter
Myfile_name.1001_parameter
Myfile_name.1002_parameter
.
.
.
.
.
Myfile_name.1_parameter
Myfile_name.20_parameter
Myfile_name.21_parameter ...so on and so forth...
I need to change these file names as follows:
Myfile_name.0001_parameter
Myfile_name.0002_parameter
Myfile_name.0003_parameter
...
...
...
Myfile_name.0100_parameter
...
...
Myfile_name.0200_parameter
..
..
..
Myfile_name.1000_parameter
...
...
...
...
Myfile_name.2000_parameter...an so on.
Simply i need to covert the filename with four digit numbers in it instead of one or two or three digit number in the filename.
Can any one help me to do the same using awk?
Expecting your reply and thanks in advance.
Warm regards
Fredrick.
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LEARN ABOUT DEBIAN
mp3::tag::file
MP3::Tag::File(3pm) User Contributed Perl Documentation MP3::Tag::File(3pm)
NAME
MP3::Tag::File - Module for reading / writing files
SYNOPSIS
my $mp3 = MP3::Tag->new($filename);
($title, $artist, $no, $album, $year) = $mp3->parse_filename();
see MP3::Tag
DESCRIPTION
MP3::Tag::File is designed to be called from the MP3::Tag module.
It offers possibilities to read/write data from files via read(), write(), truncate(), seek(), tell(), open(), close(); one can find the
filename via the filename() method.
parse_filename()
($title, $artist, $no, $album, $year) = $mp3->parse_filename($what, $filename);
parse_filename() tries to extract information about artist, title, track number, album and year from the filename. (For backward
compatibility it may be also called by deprecated name read_filename().)
This is likely to fail for a lot of filenames, especially the album will be often wrongly guessed, as the name of the parent directory
is taken as album name.
$what and $filename are optional. $what maybe title, track, artist, album or year. If $what is defined parse_filename() will return
only this element.
If $filename is defined this filename will be used and not the real filename which was set by MP3::Tag with "MP3::Tag->new($filename)".
Otherwise the actual filename is used (subject to configuration variable "decode_encoding_filename").
Following formats will be hopefully recognized:
- album name/artist name - song name.mp3
- album_name/artist_name-song_name.mp3
- album.name/artist.name_song.name.mp3
- album name/(artist name) song name.mp3
- album name/01. artist name - song name.mp3
- album name/artist name - 01 - song.name.mp3
If artist or title end in "(NUMBER)" with 4-digit NUMBER, it is considered the year.
title()
$title = $mp3->title($filename);
Returns the title, guessed from the filename. See also parse_filename(). (For backward compatibility, can be called by deprecated name
song().)
$filename is optional and will be used instead of the real filename if defined.
artist()
$artist = $mp3->artist($filename);
Returns the artist name, guessed from the filename. See also parse_filename()
$filename is optional and will be used instead of the real filename if defined.
track()
$track = $mp3->track($filename);
Returns the track number, guessed from the filename. See also parse_filename()
$filename is optional and will be used instead of the real filename if defined.
year()
$year = $mp3->year($filename);
Returns the year, guessed from the filename. See also parse_filename()
$filename is optional and will be used instead of the real filename if defined.
album()
$album = $mp3->album($filename);
Returns the album name, guessed from the filename. See also parse_filename() The album name is guessed from the parent directory, so it
is very likely to fail.
$filename is optional and will be used instead of the real filename if defined.
comment()
$comment = $mp3->comment($filename); # Always undef
genre()
$genre = $mp3->genre($filename); # Always undef
perl v5.14.2 2009-11-28 MP3::Tag::File(3pm)