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Full Discussion: First Script Syntax Error
Top Forums Shell Programming and Scripting First Script Syntax Error Post 302948303 by D351 on Sunday 28th of June 2015 02:13:00 PM
Old 06-28-2015
Quote:
Originally Posted by RudiC
Some comments on your code snippet:
Code:
files=(ls *.mp3)                # this will define & assign an array: (ls a.mp3 b.mp3 c.mp3 ...). You'd need to use it like an array in the for loop, then. 
                                # you might prefer command substitution: files=$(ls *.mp3)
                                # or let the shell do the work for you: files=*.mp3
for song in $files              # this will expand to the first array element: ls. If you want the .mp3 files as well, use array expansion: ${files[@]} if you don't like above proposals
 echo "${song%%*(.mp3)}"        # Why the * and the parentheses? You want to remove nothing but ".mp3", and once only, so one "%" is sufficient
 touch "${song%%*(.mp3)}"       # "${song%.mp3}" will do the job for you. "%*.mp3"  would erase the entire file name, the parentheses can't be matched
                                # and thus stop the expansion.  
                                # You are right in double quoting the file names which will handle spaces in file names, then.
done

I've been cobbling this together from different tutorials found via duckduckgo, so my usage of parenthesis and multiple symbols is sketchy, but based on your advice, I now have:
Code:
#!/bin/bash
#This will create blank lyric files, as used by mocp, for all mp3s in a directory

files=*.mp3
for song in ${files[*]}
do
 echo "${song%.mp3}"
 touch "${song%.mp3}"
done

which appears to be working perfectly. Thank you so much.
 

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LEARN ABOUT DEBIAN

mp3tag

MP3TAG(1)						      General Commands Manual							 MP3TAG(1)

NAME

       mp3tag - view and manipulate ID3v1 tags.

SYNOPSIS

       mp3tag [ -s song ] [ -a artist ] [ -l album ] [ -y year ] [ -e comment ] [ -k track ] [ -g genre ] [ -r ] file [ file ... ]

DESCRIPTION

       This manual page briefly documents the mp3tag command. This manual page was written for the Debian GNU/Linux distribution because the orig-
       inal program does not have one.

       mp3tag is a program that allows you to both view and manipulate ID3v1 metadata tags. Running the command with just a filename will  display
       the file's current tag. Setting some options will cause the tag to be updated and displayed.

OPTIONS

       -a artist
	      Set the artist name to artist. Strings over thirty characters are truncated.

       -e comment
	      Set the comment to comment. Strings over thirty characters are truncated.

       -g genre
	      Set  the	genre to genre. This is a single integer with a value of 0 to 254 corresponding to the appropriate Winamp compatible genre
	      (use '-g list' to list all supported genres).

       -k track
	      Set the track number to track. This is a single integer with a value of 0 to 255. Specifying this field truncates the comment  field
	      to twenty-eight characters, as per the ID3v1.1 standard.

       -l album
	      Set the album name to album. Strings over thirty characters are truncated.

       -r     Merge new tag with any preexisting tag in the file.

       -s song
	      Set the song name to song. Strings over thirty characters are truncated.

       -y year
	      Set the year to year. Strings over four characters are truncated.

EXAMPLES

       Display foo.mp3's current ID3v1 info:

	      mp3tag foo.mp3

       Set foo.mp3's artist to 'Bar', and album to 'Baz':

	      mp3tag -a Bar -l Baz foo.mp3

       Set foo.mp3's year to 2001, merging it with any tag already present:

	      mp3tag -y 2001 -r foo.mp3

AUTHOR

       mp3tag was written by Bram Avontuur <bram@avontuur.org>.

       This manual page was written by Brian Boucheron <brian@boucheron.org>, for the Debian GNU/Linux distribution (but may be used by others).

SEE ALSO

       More info on ID3v1 can be found at <http://www.id3.org/id3v1.html>.

								 February 19, 2004							 MP3TAG(1)
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