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Full Discussion: Problem with use of the ? wildcard in regex substitution.
Top Forums UNIX for Dummies Questions & Answers Problem with use of the ? wildcard in regex substitution. Post 302858119 by ropers on Saturday 28th of September 2013 09:01:03 PM
Old 09-28-2013
Problem with use of the ? wildcard in regex substitution.
I'm trying to use Larry Wall's rename (prename) tool to rename multiple files:

Code:
    $ ls -1
    blar.m4mp3
    BLAH.mpmp3
    bar foo.m4mp3
    foo bar.mpmp3

I'm trying to fix the extensions so they're all .mp3:

Code:
    rename 's/m?mp3/mp3/' *mp3

I expect m?mp3 to match the extensions, and I expect them to be substituted with mp3. But I can't seem to get it to match and work correctly.

What am I doing wrong?
Last edited by Scott; 09-28-2013 at 10:05 PM.. Reason: Code tags
 

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LEARN ABOUT DEBIAN

fatsort

fatsort(1)						      General Commands Manual							fatsort(1)

NAME

       FATSort - FAT filesystem sorting utility

SYNOPSIS

       fatsort [options] device

DESCRIPTION

       FATsort sorts directory structures of FAT filesystems.  Many MP3 hardware players don't sort files automatically but play them in the order
       they were transmitted to the device. FATSort can help here.

OPTIONS

       -c     This option causes FATSort to ignore the case of filenames (e.g. 'example.mp3' is equal to 'EXAMPLE.MP3').

       -f     Force sorting even if the device is mounted or if FATSort cannot determine if the device is mounted.

       -h     Shows some help information.

       -i     Prints some file system information of the specified device.

       -l     FATSort will not sort directory structures, but just print the current order.

       -o type
	      This options specifies how FATSort will sort files and directories.  type can be 'd' for directories  before  files  (which  is  the
	      default), 'f' for files before directories, or 'a' for no differentiation between files and directories.

       -n     Uses natural order to sort directory structures instead of  alphanumeric order.  For example, an alphanumeric order would be
		     file123.mp3
		     file21.mp3
		     file3.mp3
	      and the corresponding natural order would be
		     file3.mp3
		     file21.mp3
		     file123.mp3.

       -q     FATSort will work quietly without printing additional information messages.

       -r     Sorts the directories in reverse order (Z-A).

       -R     Sorts the directories in random order.

       -v     Shows version information only.

       The following options can be specified multiple times:

       -d directory
	      Sort directory only

       -D directory
	      Sort directory and all subdirectories

       -x directory
	      Don't sort directory

       -X directory
	      Don't sort directory and all subdirectories

       -I prefix
	      Ignore  filename	prefix	prefix	during sorting. For example, passing option -I "the " tells FATSort to sort 'The Beatles.mp3' like
	      'Beatles.mp3'.

EXAMPLES

       Sort FAT filesystem on an USB stick:
	      fatsort /dev/sda1

       Sort FAT filesystem in a file:
	      fatsort /home/user/fat16_fs.img

       Sort directory /dir1 and all subdirectories except /dir1/dirA:
	      fatsort /dev/sda1 -D /dir1 -x /dir1/dirA

       Ignore prefixes 'a ' and 'the ' during sorting:
	      fatsort /dev/sda1 -I "a " -I "the "

AUTHOR

       Boris Leidner <fatsort(at)formenos.de>

SEE ALSO

       mount(8) fsck(8)

NOTES

       FAT12 is not supported yet.

REPORT BUGS

       Please report bugs to fatsort(at)formenos.de. Thanks.

FATSort 0.9.15							       2011								fatsort(1)
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