Ubuntu Manpage: mimetype - Determine file type

Provided by: libfile-mimeinfo-perl_0.29-1_all

NAME

       mimetype - Determine file type

SYNOPSIS

       mimetype [options] [-] files

DESCRIPTION

       This script tries to determine the mime type of a file using the Shared MIME-info database. It is
       intended as a kind of file(1) work-alike, but uses mimetypes instead of descriptions.

       If one symlinks the file command to mimetype it will behave a little more compatible, see
       "--file-compat".  Commandline options to specify alternative magic files are not implemented the same
       because of the conflicting data formats.  Also the wording of the descriptions will differ.

       For naming switches I followed the manpage of file(1) version 4.02 when possible. They seem to differ
       completely from the spec in the 'utilities' chapter of IEEE Std 1003.1-2001 (POSIX).

OPTIONS

-a, --all
Show output of all rules that match the file.

TODO: this method now just returns one match for each method (globs, magic, etc.).

-b, --brief
Do not prepend filenames to output lines (brief mode).

--database=mimedir:mimedir:...
Force the program to look in these directories for the shared mime-info database. The directories
specified by the basedir specification are ignored.

-d, --describe
Print file descriptions instead of mime types, this is the default when using "--file-compat".

-D, --debug
Print debug information about how the mimetype was determined.

-f namefile, --namefile=namefile
Read the names of the files to be examined from the file 'namefile' (one per line) before the
argument list.

--file-compat
Make mimetype behave a little more file(1) compatible. This is turned on automatically when you call
mimetype by a link called 'file'.

A single '-' won't be considered a separator between options and filenames anymore, but becomes
identical to "--stdin". ( You can still use '--' as separator, but that is not backward compatible
with the original file command. ) Also the default becomes to print descriptions instead of
mimetypes.

-F string, --separator=string
Use string as custom separator between the file name and its mimetype or description, defaults to ':'
.

-h, --help
-u, --usage
Print a help message and exits.

-i, --mimetype
Use mime types, opposite to "--describe", this is the default when _not_ using "--file-compat".

-L, --dereference
Follow symbolic links.

-l code, --language=code
The language attribute specifies a two letter language code, this makes descriptions being outputted
in the specified language.

-M, --magic-only
Do not check for extensions, globs or inode type, only look at the content of the file. This is
particularly useful if for some reason you don't trust the name or the extension a file has.

-N, --noalign
Do not align output fields.

--output-format
If you want an alternative output format, you can specify a format string containing the following
escapes:

%f for the filename
%d description
%m mime type

Alignment is not available when using this, you need to post-process the output to do that.

--stdin
Determine type of content from STDIN, less powerful then normal file checking because it only uses
magic typing. This will happen also if the STDIN filehandle is a pipe.

To use this option IO::Scalar needs to be installed.

-v, --version
Print the version of the program and exit.

ENVIRONMENT

       XDG_DATA_HOME
       XDG_DATA_DIRS
           These variables can list base directories to search for data files. The shared mime-info will be
           expected in the "mime" sub directory of one of these directories. If these are not set, there will be
           searched for the following directories:

                   $HOME/.local/share/mime
                   /usr/local/share/mime
                   /usr/share/mime

           See also the "XDG Base Directory Specification" <http://freedesktop.org/Standards/basedir-spec>

FILES

       The base dir for all data files is determined by two environment variables, see "ENVIRONMENT".

       BASE/mime/packages/SOURCE.xml
           All other files are compiled from these source files. To re-compile them use update-mime-database(1).

       BASE/mime/globs
           Compiled information about globs.

       BASE/mime/magic
           Compiled information about magic numbers.

       BASE/mime/MEDIA/SUBTYPE.xml
           Descriptions of a mimetype in multiple languages, used for the "--describe" switch.

DIAGNOSTICS

       If a file has an empty mimetype or an empty description, most probably the file doesn't exist and the
       given name doesn't match any globs. An empty description can also mean that there is no description
       available in the language you specified.

       The program exits with a non-zero exit value if either the commandline arguments failed, a module it
       depends on wasn't found or the shared mime-info database wasn't accessible. See File::MimeInfo for more
       details.

TODO

       The '--all' switch doesn't really show all matches, but only one per mime-typing method. This needs to be
       implemented in the modules first.

BUGS

       If you find bugs, please file them in our Github issue tracker at
       <https://github.com/mbeijen/File-MimeInfo/issues>.

       mimetype doesn't provide a switch for looking inside compressed files because it seems to me that this
       can only be done by un-compressing the file, something that defeats the purpose. On the other hand the
       option should exist for strict compatibility with file(1). Possibly a subclass should be made for this
       one day.

AUTHOR

       Jaap Karssenberg <pardus@cpan.org> Maintained by Michiel Beijen <michiel.beijen@gmail.com>

COPYRIGHT

       Copyright (c) 2003, 2012 Jaap G Karssenberg. All rights reserved.  This program is free software; you can
       redistribute it and/or modify it under the same terms as Perl.

       This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
       the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.