NAME
comprez - safely (un)tar and (de)feather files and directories
SYNOPSIS
comprez [ -t | -T ] [ -v | -V ] [ -l | -L ] [ -gz | -z | -I | -lz | -Z
| -zip | -jar ] [ -# ] [ -s suffix ] [ -m mode ] [ -p | -P ] [ -h ] [
-- ] file ...
DESCRIPTION
Comprez is a simple, safe and convenient front-end for the compress(1),
uncompress(1), gzip(1), bzip2(1), lzip(1), tar(1), zip(1) and unzip(1)
utilities for compressing and uncompressing files and directories. It
processes each of its arguments according to the type of the file or
directory given:
If the argument is a plain file, then the file is compressed, ie,
feathered.
If the argument is a compressed file with a name ending in .Z, .gz, .z,
.bz2, .lz, .zip or .jar, then the file is uncompressed, ie,
defeathered.
If the argument is a directory, then the directory is archived into one
tar or zip file which is then compressed, ie, tarred and feathered.
If the argument is a compressed tar or zip archive with a name ending
in .{tar.,tar,ta,t}{Z,gz,z,bz2,lz} or .{zip,jar}, then the archive is
uncompressed and untarred, ie, untarred and defeathered.
The new compressed or uncompressed version will be in the same
directory as the original. A compressed file is always uncompressed
into a file with the same name sans the feather suffix. A compressed
tar or zip archive is always unpacked into a subdirectory with the same
name as the archive sans the tar and feather suffix, even if the
archive did not itself contain such a subdirectory.
OPTIONS
-- Interprets all following arguments as files instead of
options.
-# Where # is a digit from 1 through 9. This option is passed
on to gzip(1), bzip2(1), lzip(1) and zip(1) when feathering
with them. --fast may be used instead of -1 and --best
instead of -9.
-gz Uses gzip(1) and a .gz compression suffix when feathering.
-h Prints a helpful usage message.
-I Uses bzip2(1) and a .bz2 compression suffix when feathering.
-l Lists the file or directory name created resulting from each
argument.
-L Does not report created files or directories. Default.
-lz Uses lzip(1) and a .lz compression suffix when feathering.
-m mode Apply the given chmod(1) mode argument to any created tar and
feather files. Before this argument is applied, the files
have the same read and write permissions as the directories
from which they were created. For security, the default
argument is go-rwx. If the mode is -, then no argument is
applied. See chmod(1) for all other allowable formats of
this argument.
-p Preserves modes when untarring by giving the p flag to
tar(1). Default.
-P Doesn’t preserve modes when untarring by not giving the p
flag to tar(1). This option may be necessary on systems
where ordinary users are allowed to run chown(2).
-s suffix Creates tar and feather files using the given suffix style.
The default suffix style is .tar.Z. Note that the suffix
style does not dictate the program used for feathering nor
the compression suffix.
-t Only lists the table of contents of the given files. Does
not make any changes.
-T (Un)tars and (de)feathers the given files according to their
type. Default.
-v Verbose output. For example, reports compression ratios when
feathering.
-V Non-verbose output. Does not report compression ratios.
Default. -q is a synonym.
-z Uses gzip(1) and a .z compression suffix when feathering.
-Z Uses compress(1) and a .Z compression suffix when feathering.
Default.
-zip, -jar
Uses zip(1) and a .zip or .jar compression suffix when
tarring and/or feathering. The zip format combines tarring
and feathering. WARNING: zip does not preserve complete Unix
filesystem information for the files it archives, such as
links, some permissions, etc. A tar(1)-based format should
be used if this is required.
ENVIRONMENT VARIABLES
ZOPTS This variable may be set to a string of the above options to
supersede the default settings. They may still be overridden
by options given on the command line.
GZIP This environment variable for gzip(1) is not passed on by
comprez so that gzip’s behavior is standard and predictable.
ZIPOPT, UNZIP
These environment variables for zip(1) and unzip(1) are not
passed on by comprez so that their behavior is standard and
predictable.
BUGS
There should be an option to allow the use of another directory for
temporary files needed during the (un)tarring and (de)feathering
processes. This would make comprez more useful when the quota or disk
is nearly full.
There should be -k and -K options for keeping the original input files
or not.
CAVEATS
Comprez is written to work with gzip versions 1.2.3 and 1.2.4, bzip2
versions 0.9.0 and 1.0.0, Unix zip version 2.0.1 and Unix unzip version
5.12. Other versions will probably work safely, too, but should still
be checked for compatibility.
Every effort has been made to assure that the use of this program will
not lead to the inappropriate deletion or corruption of any files.
However, there are never any guarantees, so please use at your own
risk.
VERSION
2.6.1
AUTHOR
Steve Kinzler, kinzler@cs.indiana.edu, May 89/Jun 93/Aug 99/Dec 00
URL
http://www.cs.indiana.edu/~kinzler/z
SEE ALSO
compress(1), uncompress(1), gzip(1), bzip2(1), lzip(1), tar(1), zip(1),
unzip(1)
2.6.1 Z(1)