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)