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Merging upstream version 1.4~pre2.

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Signed-off-by: Daniel Baumann <daniel@debian.org>
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Daniel Baumann 2025-02-24 05:51:15 +01:00
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138
doc/zutils.texi
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@ -6,8 +6,8 @@
@finalout
@c %**end of header
@set UPDATED 30 August 2014
@set VERSION 1.3
@set UPDATED 30 April 2015
@set VERSION 1.4-pre2
@dircategory Data Compression
@direntry
@ -36,7 +36,7 @@ This manual is for Zutils (version @value{VERSION}, @value{UPDATED}).
@menu
* Introduction:: Purpose and features of zutils
* Common options:: Common options
* Common options:: Options common to all utilities
* The zutilsrc file:: The zutils configuration file
* Zcat:: Concatenating compressed files
* Zcmp:: Comparing compressed files byte by byte
@ -49,7 +49,7 @@ This manual is for Zutils (version @value{VERSION}, @value{UPDATED}).
@end menu
@sp 1
Copyright @copyright{} 2009-2014 Antonio Diaz Diaz.
Copyright @copyright{} 2009-2015 Antonio Diaz Diaz.
This manual is free documentation: you have unlimited permission
to copy, distribute and modify it.
@ -81,11 +81,16 @@ similar to gzip's znew.
NOTE: Bzip2 and lzip provide well-defined values of exit status, which
makes them safe to use with zutils. Gzip and xz may return ambiguous
warning values, making them less reliable back ends for zutils.
@xref{compressor-requirements}.
FORMAT NOTE: If the @samp{--format} option is given, the corresponding
files are passed to the decompressor without verifying their format,
FORMAT NOTE: The "--format" option allows the processing of a subset of
formats in search and recursive modes:
@w{@samp{zgrep foo -r --format=bz2,lz somedir}}.
FORMAT NOTE 2: If the @samp{--force-format} option is given, the files are
passed to the corresponding decompressor without verifying their format,
allowing for example the processing of compress'd (.Z) files with gzip:
@samp{zcmp --format=gz file.Z file.lz}.
@w{@samp{zcmp --force-format=gz file.Z file.lz}}.
LANGUAGE NOTE: Uncompressed = not compressed = plain data; it may never
have been compressed. Decompressed is used to refer to data which has
@ -128,6 +133,28 @@ only supports the @samp{--help} form of this option.
@itemx --version
Print the version number on the standard output and exit.
@item -M @var{format_list}
@itemx --format=@var{format_list}
Exclude formats not listed in the comma-separated @var{format_list}.
Valid formats are @samp{bz2}, @samp{gz}, @samp{lz}, @samp{xz} and
@samp{un} for @samp{uncompressed}, meaning "any file name without a
known extension". This option excludes files based on extension, instead
of format, because it is more efficient. The exclusion only applies to
names generated automatically (for example when adding extensions to a
file name or when operating recursively on directories). Files given in
the command line are always processed.
Each format in @var{format_list} enables file names with the following
extensions:
@multitable {bz2} {enables} {any other file name}
@item bz2 @tab enables @tab .bz2 .tbz .tbz2
@item gz @tab enables @tab .gz .tgz
@item lz @tab enables @tab .lz .tlz
@item xz @tab enables @tab .xz .txz
@item un @tab enables @tab any other file name
@end multitable
@item -N
@itemx --no-rcfile
Don't read the runtime configuration file @samp{zutilsrc}.
@ -137,9 +164,11 @@ Don't read the runtime configuration file @samp{zutilsrc}.
@itemx --lz=@var{command}
@itemx --xz=@var{command}
Set program (may include arguments) to be used as (de)compressor for the
given format. These options override the values set in @file{zutilsrc}.
The compression program used must meet three requirements:
given format. The mane of the program can't begin with @samp{-}. These
options override the values set in @file{zutilsrc}. The compression
program used must meet three requirements:
@anchor{compressor-requirements}
@enumerate
@item
When called with the @samp{-d} option, it must read compressed data from
@ -227,15 +256,18 @@ Equivalent to @samp{-vE}.
@itemx --show-ends
Print a @samp{$} after the end of each line.
@item --format=@var{fmt}
Force the given compression format. Valid values for @var{fmt} are
@samp{bz2}, @samp{gz}, @samp{lz} and @samp{xz}. If this option is used,
the exact file name must be given. Other names won't be tried.
@item -n
@itemx --number
Number all output lines, starting with 1. The line count is unlimited.
@item -O @var{format}
@itemx --force-format=@var{format}
Force the given compression format. Valid values for @var{format} are
@samp{bz2}, @samp{gz}, @samp{lz} and @samp{xz}. If this option is used,
the files are passed to the corresponding decompressor without verifying
their format, and the exact file name must be given. Other names won't
be tried.
@item -q
@itemx --quiet
Quiet operation. Suppress all messages.
@ -313,14 +345,6 @@ Print the differing bytes. Print control bytes as a @samp{^} followed by
a letter, and precede bytes larger than 127 with @samp{M-} (which stands
for "meta").
@item --format=[@var{fmt1}][,@var{fmt2}]
Force the given compression formats. Any of @var{fmt1} or @var{fmt2} may
be omitted and the corresponding format will be automatically detected.
Valid values for @var{fmt} are @samp{bz2}, @samp{gz}, @samp{lz} and
@samp{xz}. If at least one format is specified with this option, the
exact file names of both @var{file1} and @var{file2} must be given.
Other names won't be tried.
@item -i @var{size}
@itemx --ignore-initial=@var{size}
Ignore any differences in the first @var{size} bytes of the input files.
@ -340,6 +364,16 @@ differing bytes.
@itemx --bytes=@var{count}
Compare at most @var{count} input bytes.
@item -O [@var{format1}][,@var{format2}]
@itemx --force-format=[@var{format1}][,@var{format2}]
Force the given compression formats. Any of @var{format1} or
@var{format2} may be omitted and the corresponding format will be
automatically detected. Valid values for @var{format} are @samp{bz2},
@samp{gz}, @samp{lz} and @samp{xz}. If at least one format is specified
with this option, the file is passed to the corresponding decompressor
without verifying its format, and the exact file names of both
@var{file1} and @var{file2} must be given. Other names won't be tried.
@item -q
@itemx -s
@itemx --quiet
@ -358,7 +392,7 @@ Zdiff compares two files (@samp{-} means standard input), and if they
differ, shows the differences line by line. If any given file is
compressed, its decompressed content is used. Zdiff is a front end to
the diff program and has the limitation that messages from diff refer to
temporary filenames instead of those specified.
temporary file names instead of those specified.
The format for running zdiff is:
@ -417,18 +451,20 @@ Try hard to find a smaller set of changes.
@itemx --ignore-tab-expansion
Ignore changes due to tab expansion.
@item --format=[@var{fmt1}][,@var{fmt2}]
Force the given compression formats. Any of @var{fmt1} or @var{fmt2} may
be omitted and the corresponding format will be automatically detected.
Valid values for @var{fmt} are @samp{bz2}, @samp{gz}, @samp{lz} and
@samp{xz}. If at least one format is specified with this option, the
exact file names of both @var{file1} and @var{file2} must be given.
Other names won't be tried.
@item -i
@itemx --ignore-case
Ignore case differences in file contents.
@item -O [@var{format1}][,@var{format2}]
@itemx --force-format=[@var{format1}][,@var{format2}]
Force the given compression formats. Any of @var{format1} or
@var{format2} may be omitted and the corresponding format will be
automatically detected. Valid values for @var{format} are @samp{bz2},
@samp{gz}, @samp{lz} and @samp{xz}. If at least one format is specified
with this option, the file is passed to the corresponding decompressor
without verifying its format, and the exact file names of both
@var{file1} and @var{file2} must be given. Other names won't be tried.
@item -p
@itemx --show-c-function
Show which C function each change is in.
@ -532,19 +568,14 @@ Obtain patterns from @var{file}, one per line.
@itemx --fixed-strings
Treat @var{pattern} as a set of newline-separated strings.
@item --format=@var{fmt}
Force the given compression format. Valid values for @var{fmt} are
@samp{bz2}, @samp{gz}, @samp{lz} and @samp{xz}. If this option is used,
the exact file name must be given. Other names won't be tried.
@item -h
@itemx --no-filename
Suppress the prefixing of filenames on output when multiple files are
Suppress the prefixing of file names on output when multiple files are
searched.
@item -H
@itemx --with-filename
Print the filename for each match.
Print the file name for each match.
@item -i
@itemx --ignore-case
@ -573,6 +604,14 @@ Prefix each matched line with its line number in the input file.
@itemx --only-matching
Show only the part of matching lines that actually matches @var{pattern}.
@item -O @var{format}
@itemx --force-format=@var{format}
Force the given compression format. Valid values for @var{format} are
@samp{bz2}, @samp{gz}, @samp{lz} and @samp{xz}. If this option is used,
the files are passed to the corresponding decompressor without verifying
their format, and the exact file name must be given. Other names won't
be tried.
@item -q
@itemx --quiet
Suppress all messages. Exit immediately with zero status if any match is
@ -630,10 +669,15 @@ environmental problems (file not found, invalid flags, I/O errors, etc),
Ztest supports the following options:
@table @samp
@item --format=@var{fmt}
Force the given compression format. Valid values for @var{fmt} are
@item -O @var{format}
@itemx --force-format=@var{format}
Force the given compression format. Valid values for @var{format} are
@samp{bz2}, @samp{gz}, @samp{lz} and @samp{xz}. If this option is used,
all files not in the given format will fail.
the files are passed to the corresponding decompressor without verifying
their format, and any files in a format that the decompressor can't
understand will fail. For example, @samp{--force-format=gz} can test
gzipped (.gz) and compress'd (.Z) files if the compressor used is GNU
gzip.
@item -q
@itemx --quiet
@ -670,11 +714,21 @@ and the original file is not deleted. The operation of zupdate is meant
to be safe and not produce any data loss. Therefore, existing lzip
compressed files are never overwritten nor deleted.
Combining the @samp{--force} and @samp{--keep} options, as in
@w{@code{zupdate -f -k *.gz}}, verifies that there are no differences
between each pair of files in a multiformat set of files.
The names of the original files must have one of the following
extensions: @samp{.bz2}, @samp{.tbz}, @samp{.tbz2}, @samp{.gz},
@samp{.tgz}, @samp{.xz}, @samp{.txz}. The files produced have the
extensions @samp{.lz} or @samp{.tar.lz}.
Recompressing a file is much like copying or moving it; therefore
zupdate preserves the access and modification dates, permissions, and,
when possible, ownership of the file just as "cp -p" does. (If the user
ID or the group ID can't be duplicated, the file permission bits S_ISUID
and S_ISGID are cleared).
The format for running zupdate is:
@example
@ -739,7 +793,7 @@ for all eternity, if not longer.
If you find a bug in zutils, please send electronic mail to
@email{zutils-bug@@nongnu.org}. Include the version number, which you can
find by running @w{@samp{zupdate --version}}.
find by running @w{@code{zupdate --version}}.
@node Concept index