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Adding upstream version 1.8.

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Signed-off-by: Daniel Baumann <daniel@debian.org>
This commit is contained in:
Daniel Baumann 2025-02-24 05:57:59 +01:00
parent 350226fc6e
commit 6e7259427c
Signed by: daniel
GPG key ID: FBB4F0E80A80222F
34 changed files with 858 additions and 455 deletions
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22
doc/zcat.1
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@ -1,5 +1,5 @@
.\" DO NOT MODIFY THIS FILE! It was generated by help2man 1.46.1.
.TH ZCAT "1" "February 2018" "zcat (zutils) 1.7" "User Commands"
.TH ZCAT "1" "January 2019" "zcat (zutils) 1.8" "User Commands"
.SH NAME
zcat \- decompress and concatenate files to standard output
.SH SYNOPSIS
@ -9,14 +9,17 @@ zcat \- decompress and concatenate files to standard output
Zcat copies each given file to standard output. If any given file is
compressed, its decompressed content is used. If a given file does not
exist, and its name does not end with one of the known extensions, zcat
tries the compressed file names corresponding to the supported formats.
tries the compressed file names corresponding to the formats supported.
.PP
If no files are specified, or if a file is specified as '\-', data are
read from standard input, decompressed if needed, and sent to standard
output. Data read from standard input must be of the same type; all
uncompressed or all in the same compression format.
If a file is specified as '\-', data are read from standard input,
decompressed if needed, and sent to standard output. Data read from
standard input must be of the same type; all uncompressed or all in the
same compression format.
.PP
The supported formats are bzip2, gzip, lzip and xz.
If no files are specified, recursive searches examine the current
working directory, and nonrecursive searches read standard input.
.PP
The formats supported are bzip2, gzip, lzip and xz.
.PP
Exit status is 0 if no errors occurred, non\-zero otherwise.
.SH OPTIONS
@ -57,6 +60,9 @@ suppress all messages
\fB\-r\fR, \fB\-\-recursive\fR
operate recursively on directories
.TP
\fB\-R\fR, \fB\-\-dereference\-recursive\fR
recursively follow symbolic links
.TP
\fB\-s\fR, \fB\-\-squeeze\-blank\fR
never more than one single blank line
.TP
@ -88,7 +94,7 @@ Report bugs to zutils\-bug@nongnu.org
.br
Zutils home page: http://www.nongnu.org/zutils/zutils.html
.SH COPYRIGHT
Copyright \(co 2018 Antonio Diaz Diaz.
Copyright \(co 2019 Antonio Diaz Diaz.
License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl.html>
.br
This is free software: you are free to change and redistribute it.

6
doc/zcmp.1
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@ -1,5 +1,5 @@
.\" DO NOT MODIFY THIS FILE! It was generated by help2man 1.46.1.
.TH ZCMP "1" "February 2018" "zcmp (zutils) 1.7" "User Commands"
.TH ZCMP "1" "January 2019" "zcmp (zutils) 1.8" "User Commands"
.SH NAME
zcmp \- decompress and compare two files byte by byte
.SH SYNOPSIS
@ -12,7 +12,7 @@ are numbered starting with 1. If any given file is compressed, its
decompressed content is used. Compressed files are decompressed on the
fly; no temporary files are created.
.PP
The supported formats are bzip2, gzip, lzip and xz.
The formats supported are bzip2, gzip, lzip and xz.
.PP
Zcmp compares file1 to file2. If file2 is omitted zcmp tries the
following:
@ -85,7 +85,7 @@ Report bugs to zutils\-bug@nongnu.org
.br
Zutils home page: http://www.nongnu.org/zutils/zutils.html
.SH COPYRIGHT
Copyright \(co 2018 Antonio Diaz Diaz.
Copyright \(co 2019 Antonio Diaz Diaz.
License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl.html>
.br
This is free software: you are free to change and redistribute it.

6
doc/zdiff.1
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@ -1,5 +1,5 @@
.\" DO NOT MODIFY THIS FILE! It was generated by help2man 1.46.1.
.TH ZDIFF "1" "February 2018" "zdiff (zutils) 1.7" "User Commands"
.TH ZDIFF "1" "January 2019" "zdiff (zutils) 1.8" "User Commands"
.SH NAME
zdiff \- decompress and compare two files line by line
.SH SYNOPSIS
@ -12,7 +12,7 @@ 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.
.PP
The supported formats are bzip2, gzip, lzip and xz.
The formats supported are bzip2, gzip, lzip and xz.
.PP
Zdiff compares file1 to file2. If file2 is omitted zdiff tries the
following:
@ -109,7 +109,7 @@ Report bugs to zutils\-bug@nongnu.org
.br
Zutils home page: http://www.nongnu.org/zutils/zutils.html
.SH COPYRIGHT
Copyright \(co 2018 Antonio Diaz Diaz.
Copyright \(co 2019 Antonio Diaz Diaz.
License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl.html>
.br
This is free software: you are free to change and redistribute it.

22
doc/zgrep.1
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@ -1,5 +1,5 @@
.\" DO NOT MODIFY THIS FILE! It was generated by help2man 1.46.1.
.TH ZGREP "1" "February 2018" "zgrep (zutils) 1.7" "User Commands"
.TH ZGREP "1" "January 2019" "zgrep (zutils) 1.8" "User Commands"
.SH NAME
zgrep \- search compressed files for a regular expression
.SH SYNOPSIS
@ -11,14 +11,17 @@ on any combination of compressed and uncompressed files. If any given
file is compressed, its decompressed content is used. If a given file
does not exist, and its name does not end with one of the known
extensions, zgrep tries the compressed file names corresponding to the
supported formats.
formats supported.
.PP
If no files are specified, or if a file is specified as '\-', data are
read from standard input, decompressed if needed, and fed to grep. Data
read from standard input must be of the same type; all uncompressed or
all in the same compression format.
If a file is specified as '\-', data are read from standard input,
decompressed if needed, and fed to grep. Data read from standard input
must be of the same type; all uncompressed or all in the same
compression format.
.PP
The supported formats are bzip2, gzip, lzip and xz.
If no files are specified, recursive searches examine the current
working directory, and nonrecursive searches read standard input.
.PP
The formats supported are bzip2, gzip, lzip and xz.
.PP
Exit status is 0 if match, 1 if no match, 2 if trouble.
.SH OPTIONS
@ -104,6 +107,9 @@ suppress all messages
\fB\-r\fR, \fB\-\-recursive\fR
operate recursively on directories
.TP
\fB\-R\fR, \fB\-\-dereference\-recursive\fR
recursively follow symbolic links
.TP
\fB\-s\fR, \fB\-\-no\-messages\fR
suppress error messages
.TP
@ -138,7 +144,7 @@ Report bugs to zutils\-bug@nongnu.org
.br
Zutils home page: http://www.nongnu.org/zutils/zutils.html
.SH COPYRIGHT
Copyright \(co 2018 Antonio Diaz Diaz.
Copyright \(co 2019 Antonio Diaz Diaz.
License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl.html>
.br
This is free software: you are free to change and redistribute it.

19
doc/ztest.1
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@ -1,5 +1,5 @@
.\" DO NOT MODIFY THIS FILE! It was generated by help2man 1.46.1.
.TH ZTEST "1" "February 2018" "ztest (zutils) 1.7" "User Commands"
.TH ZTEST "1" "January 2019" "ztest (zutils) 1.8" "User Commands"
.SH NAME
ztest \- verify the integrity of compressed files
.SH SYNOPSIS
@ -7,12 +7,14 @@ ztest \- verify the integrity of compressed files
[\fI\,options\/\fR] [\fI\,files\/\fR]
.SH DESCRIPTION
Ztest verifies the integrity of the specified compressed files.
Uncompressed files are ignored. If no files are specified, or if a file
is specified as '\-', the integrity of compressed data read from standard
input is verified. Data read from standard input must be all in the same
compression format.
Uncompressed files are ignored. If a file is specified as '\-', the
integrity of compressed data read from standard input is verified. Data
read from standard input must be all in the same compression format.
.PP
The supported formats are bzip2, gzip, lzip and xz.
If no files are specified, recursive searches examine the current
working directory, and nonrecursive searches read standard input.
.PP
The formats supported are bzip2, gzip, lzip and xz.
.PP
Note that error detection in the xz format is broken. First, some xz
files lack integrity information. Second, not all xz decompressors can
@ -47,6 +49,9 @@ suppress all messages
\fB\-r\fR, \fB\-\-recursive\fR
operate recursively on directories
.TP
\fB\-R\fR, \fB\-\-dereference\-recursive\fR
recursively follow symbolic links
.TP
\fB\-v\fR, \fB\-\-verbose\fR
be verbose (a 2nd \fB\-v\fR gives more)
.TP
@ -66,7 +71,7 @@ Report bugs to zutils\-bug@nongnu.org
.br
Zutils home page: http://www.nongnu.org/zutils/zutils.html
.SH COPYRIGHT
Copyright \(co 2018 Antonio Diaz Diaz.
Copyright \(co 2019 Antonio Diaz Diaz.
License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl.html>
.br
This is free software: you are free to change and redistribute it.

23
doc/zupdate.1
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@ -1,19 +1,21 @@
.\" DO NOT MODIFY THIS FILE! It was generated by help2man 1.46.1.
.TH ZUPDATE "1" "February 2018" "zupdate (zutils) 1.7" "User Commands"
.TH ZUPDATE "1" "January 2019" "zupdate (zutils) 1.8" "User Commands"
.SH NAME
zupdate \- recompress bzip2, gzip, xz files to lzip format
.SH SYNOPSIS
.B zupdate
[\fI\,options\/\fR] [\fI\,files\/\fR]
.SH DESCRIPTION
Zupdate recompresses files from bzip2, gzip, and xz formats to lzip format.
The originals are compared with the new files and then deleted.
Zupdate recompresses files from bzip2, gzip, and xz formats to lzip
format. Each original is compared with the new file and then deleted.
Only regular files with standard file name extensions are recompressed,
other files are ignored.
Compressed files are decompressed and then recompressed on the fly; no
temporary files are created.
The lzip format is chosen as destination because it is by far the most
appropriate for long\-term data archiving.
other files are ignored. Compressed files are decompressed and then
recompressed on the fly; no temporary files are created. The lzip format
is chosen as destination because it is the most appropriate for
long\-term data archiving.
.PP
If no files are specified, recursive searches examine the current
working directory, and nonrecursive searches do nothing.
.PP
If the lzip compressed version of a file already exists, the file is
skipped unless the '\-\-force' option is given. In this case, if the
@ -54,6 +56,9 @@ suppress all messages
\fB\-r\fR, \fB\-\-recursive\fR
operate recursively on directories
.TP
\fB\-R\fR, \fB\-\-dereference\-recursive\fR
recursively follow symbolic links
.TP
\fB\-v\fR, \fB\-\-verbose\fR
be verbose (a 2nd \fB\-v\fR gives more)
.TP
@ -76,7 +81,7 @@ Report bugs to zutils\-bug@nongnu.org
.br
Zutils home page: http://www.nongnu.org/zutils/zutils.html
.SH COPYRIGHT
Copyright \(co 2018 Antonio Diaz Diaz.
Copyright \(co 2019 Antonio Diaz Diaz.
License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl.html>
.br
This is free software: you are free to change and redistribute it.

125
doc/zutils.info
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@ -12,7 +12,7 @@ File: zutils.info, Node: Top, Next: Introduction, Up: (dir)
Zutils Manual
*************
This manual is for Zutils (version 1.7, 13 February 2018).
This manual is for Zutils (version 1.8, 1 January 2019).
* Menu:
@ -29,7 +29,7 @@ This manual is for Zutils (version 1.7, 13 February 2018).
* Concept index:: Index of concepts
Copyright (C) 2009-2018 Antonio Diaz Diaz.
Copyright (C) 2009-2019 Antonio Diaz Diaz.
This manual is free documentation: you have unlimited permission to
copy, distribute and modify it.
@ -50,8 +50,8 @@ are created.
C++ programs. In particular the '--recursive' option is very efficient
in those utilities supporting it.
The provided utilities are zcat, zcmp, zdiff, zgrep, ztest and zupdate.
The supported formats are bzip2, gzip, lzip and xz.
The utilities provided are zcat, zcmp, zdiff, zgrep, ztest and zupdate.
The formats supported are bzip2, gzip, lzip and xz.
Zutils uses external compressors. The compressor to be used for each
format is configurable at runtime.
@ -110,7 +110,8 @@ described here.
'-V'
'--version'
Print the version number on the standard output and exit.
Print the version number on the standard output and exit. This
version number should be included in all bug reports.
'-M FORMAT_LIST'
'--format=FORMAT_LIST'
@ -190,12 +191,17 @@ File: zutils.info, Node: Zcat, Next: Zcmp, Prev: The zutilsrc file, Up: Top
zcat copies each given file to standard output. If any given file is
compressed, its decompressed content is used. If a given file does not
exist, and its name does not end with one of the known extensions, zcat
tries the compressed file names corresponding to the supported formats.
tries the compressed file names corresponding to the formats supported.
If a file fails to decompress, zcat continues copying the rest of the
files.
If no files are specified, or if a file is specified as '-', data
are read from standard input, decompressed if needed, and sent to
standard output. Data read from standard input must be of the same type;
all uncompressed or all in the same compression format.
If a file is specified as '-', data are read from standard input,
decompressed if needed, and sent to standard output. Data read from
standard input must be of the same type; all uncompressed or all in the
same compression format.
If no files are specified, recursive searches examine the current
working directory, and nonrecursive searches read standard input.
The format for running zcat is:
@ -240,7 +246,14 @@ Exit status is 0 if no errors occurred, non-zero otherwise.
'-r'
'--recursive'
Operate recursively on directories.
For each directory operand, read and process all files in that
directory, recursively. Follow symbolic links in the command line,
but skip symlinks that are encountered recursively.
'-R'
'--dereference-recursive'
For each directory operand, read and process all files in that
directory, recursively, following all symbolic links.
'-s'
'--squeeze-blank'
@ -459,12 +472,16 @@ on any combination of compressed and uncompressed files. If any given
file is compressed, its decompressed content is used. If a given file
does not exist, and its name does not end with one of the known
extensions, zgrep tries the compressed file names corresponding to the
supported formats.
formats supported. If a file fails to decompress, zgrep continues
searching the rest of the files.
If no files are specified, or if a file is specified as '-', data
are read from standard input, decompressed if needed, and fed to grep.
Data read from standard input must be of the same type; all uncompressed
or all in the same compression format.
If a file is specified as '-', data are read from standard input,
decompressed if needed, and fed to grep. Data read from standard input
must be of the same type; all uncompressed or all in the same
compression format.
If no files are specified, recursive searches examine the current
working directory, and nonrecursive searches read standard input.
The format for running zgrep is:
@ -573,7 +590,14 @@ grep program used supports them):
'-r'
'--recursive'
Operate recursively on directories.
For each directory operand, read and process all files in that
directory, recursively. Follow symbolic links in the command line,
but skip symlinks that are encountered recursively.
'-R'
'--dereference-recursive'
For each directory operand, read and process all files in that
directory, recursively, following all symbolic links.
'-s'
'--no-messages'
@ -602,10 +626,14 @@ File: zutils.info, Node: Ztest, Next: Zupdate, Prev: Zgrep, Up: Top
*******
ztest verifies the integrity of the specified compressed files.
Uncompressed files are ignored. If no files are specified, or if a file
is specified as '-', the integrity of compressed data read from
standard input is verified. Data read from standard input must be all in
the same compression format.
Uncompressed files are ignored. If a file is specified as '-', the
integrity of compressed data read from standard input is verified. Data
read from standard input must be all in the same compression format. If
a file fails to decompress, ztest continues verifying the rest of the
files.
If no files are specified, recursive searches examine the current
working directory, and nonrecursive searches read standard input.
Note that error detection in the xz format is broken. First, some xz
files lack integrity information. Second, not all xz decompressors can
@ -640,7 +668,14 @@ environmental problems (file not found, invalid flags, I/O errors, etc),
'-r'
'--recursive'
Operate recursively on directories.
For each directory operand, read and process all files in that
directory, recursively. Follow symbolic links in the command line,
but skip symlinks that are encountered recursively.
'-R'
'--dereference-recursive'
For each directory operand, read and process all files in that
directory, recursively, following all symbolic links.
'-v'
'--verbose'
@ -658,9 +693,14 @@ zupdate recompresses files from bzip2, gzip, and xz formats to lzip
format. Each original is compared with the new file and then deleted.
Only regular files with standard file name extensions are recompressed,
other files are ignored. Compressed files are decompressed and then
recompressed on the fly; no temporary files are created. The lzip format
is chosen as destination because it is by far the most appropriate for
long-term data archiving.
recompressed on the fly; no temporary files are created. If an error
happens while recompressing a file, zupdate exits immediately without
recompressing the rest of the files. The lzip format is chosen as
destination because it is the most appropriate for long-term data
archiving.
If no files are specified, recursive searches examine the current
working directory, and nonrecursive searches do nothing.
If the lzip compressed version of a file already exists, the file is
skipped unless the '--force' option is given. In this case, if the
@ -679,7 +719,7 @@ files produced have the extensions '.lz' or '.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
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).
@ -718,7 +758,14 @@ otherwise.
'-r'
'--recursive'
Operate recursively on directories.
For each directory operand, read and process all files in that
directory, recursively. Follow symbolic links in the command line,
but skip symlinks that are encountered recursively.
'-R'
'--dereference-recursive'
For each directory operand, read and process all files in that
directory, recursively, following all symbolic links.
'-v'
'--verbose'
@ -770,18 +817,18 @@ Concept index

Tag Table:
Node: Top222
Node: Introduction1151
Node: Common options3775
Ref: compressor-requirements5533
Node: The zutilsrc file5905
Node: Zcat6830
Node: Zcmp8884
Node: Zdiff11343
Node: Zgrep14047
Node: Ztest17541
Node: Zupdate19375
Node: Problems22247
Node: Concept index22781
Node: Introduction1149
Node: Common options3773
Ref: compressor-requirements5596
Node: The zutilsrc file5968
Node: Zcat6893
Node: Zcmp9445
Node: Zdiff11904
Node: Zgrep14608
Node: Ztest18603
Node: Zupdate20938
Node: Problems24364
Node: Concept index24898

End Tag Table

101
doc/zutils.texi
View file

@ -6,8 +6,8 @@
@finalout
@c %**end of header
@set UPDATED 13 February 2018
@set VERSION 1.7
@set UPDATED 1 January 2019
@set VERSION 1.8
@dircategory Data Compression
@direntry
@ -49,7 +49,7 @@ This manual is for Zutils (version @value{VERSION}, @value{UPDATED}).
@end menu
@sp 1
Copyright @copyright{} 2009-2018 Antonio Diaz Diaz.
Copyright @copyright{} 2009-2019 Antonio Diaz Diaz.
This manual is free documentation: you have unlimited permission
to copy, distribute and modify it.
@ -70,8 +70,8 @@ programs. In particular the @samp{--recursive} option is very efficient
in those utilities supporting it.
@noindent
The provided utilities are zcat, zcmp, zdiff, zgrep, ztest and zupdate.@*
The supported formats are bzip2, gzip, lzip and xz.@*
The utilities provided are zcat, zcmp, zdiff, zgrep, ztest and zupdate.@*
The formats supported are bzip2, gzip, lzip and xz.@*
Zutils uses external compressors. The compressor to be used for each
format is configurable at runtime.
@ -133,6 +133,7 @@ only supports the @samp{--help} form of this option.
@item -V
@itemx --version
Print the version number on the standard output and exit.
This version number should be included in all bug reports.
@item -M @var{format_list}
@itemx --format=@var{format_list}
@ -221,12 +222,17 @@ where <format> is one of @samp{bz2}, @samp{gz}, @samp{lz} or @samp{xz}.
zcat copies each given file to standard output. If any given file is
compressed, its decompressed content is used. If a given file does not
exist, and its name does not end with one of the known extensions, zcat
tries the compressed file names corresponding to the supported formats.
tries the compressed file names corresponding to the formats supported.
If a file fails to decompress, zcat continues copying the rest of the
files.
If no files are specified, or if a file is specified as @samp{-}, data
are read from standard input, decompressed if needed, and sent to
standard output. Data read from standard input must be of the same type;
all uncompressed or all in the same compression format.
If a file is specified as @samp{-}, data are read from standard input,
decompressed if needed, and sent to standard output. Data read from
standard input must be of the same type; all uncompressed or all in the
same compression format.
If no files are specified, recursive searches examine the current
working directory, and nonrecursive searches read standard input.
The format for running zcat is:
@ -274,7 +280,14 @@ Quiet operation. Suppress all messages.
@item -r
@itemx --recursive
Operate recursively on directories.
For each directory operand, read and process all files in that
directory, recursively. Follow symbolic links in the command line, but
skip symlinks that are encountered recursively.
@item -R
@itemx --dereference-recursive
For each directory operand, read and process all files in that
directory, recursively, following all symbolic links.
@item -s
@itemx --squeeze-blank
@ -509,12 +522,16 @@ on any combination of compressed and uncompressed files. If any given
file is compressed, its decompressed content is used. If a given file
does not exist, and its name does not end with one of the known
extensions, zgrep tries the compressed file names corresponding to the
supported formats.
formats supported. If a file fails to decompress, zgrep continues
searching the rest of the files.
If no files are specified, or if a file is specified as @samp{-}, data
are read from standard input, decompressed if needed, and fed to grep.
Data read from standard input must be of the same type; all uncompressed
or all in the same compression format.
If a file is specified as @samp{-}, data are read from standard input,
decompressed if needed, and fed to grep. Data read from standard input
must be of the same type; all uncompressed or all in the same
compression format.
If no files are specified, recursive searches examine the current
working directory, and nonrecursive searches read standard input.
The format for running zgrep is:
@ -629,7 +646,14 @@ found, even if an error was detected.
@item -r
@itemx --recursive
Operate recursively on directories.
For each directory operand, read and process all files in that
directory, recursively. Follow symbolic links in the command line, but
skip symlinks that are encountered recursively.
@item -R
@itemx --dereference-recursive
For each directory operand, read and process all files in that
directory, recursively, following all symbolic links.
@item -s
@itemx --no-messages
@ -658,10 +682,14 @@ Match only whole lines.
@cindex ztest
ztest verifies the integrity of the specified compressed files.
Uncompressed files are ignored. If no files are specified, or if a file
is specified as @samp{-}, the integrity of compressed data read from
standard input is verified. Data read from standard input must be all in
the same compression format.
Uncompressed files are ignored. If a file is specified as @samp{-}, the
integrity of compressed data read from standard input is verified. Data
read from standard input must be all in the same compression format. If
a file fails to decompress, ztest continues verifying the rest of the
files.
If no files are specified, recursive searches examine the current
working directory, and nonrecursive searches read standard input.
Note that error detection in the xz format is broken. First, some xz
files lack integrity information. Second, not all xz decompressors can
@ -703,7 +731,14 @@ Quiet operation. Suppress all messages.
@item -r
@itemx --recursive
Operate recursively on directories.
For each directory operand, read and process all files in that
directory, recursively. Follow symbolic links in the command line, but
skip symlinks that are encountered recursively.
@item -R
@itemx --dereference-recursive
For each directory operand, read and process all files in that
directory, recursively, following all symbolic links.
@item -v
@itemx --verbose
@ -721,9 +756,14 @@ zupdate recompresses files from bzip2, gzip, and xz formats to lzip
format. Each original is compared with the new file and then deleted.
Only regular files with standard file name extensions are recompressed,
other files are ignored. Compressed files are decompressed and then
recompressed on the fly; no temporary files are created. The lzip format
is chosen as destination because it is by far the most appropriate for
long-term data archiving.
recompressed on the fly; no temporary files are created. If an error
happens while recompressing a file, zupdate exits immediately without
recompressing the rest of the files. The lzip format is chosen as
destination because it is the most appropriate for long-term data
archiving.
If no files are specified, recursive searches examine the current
working directory, and nonrecursive searches do nothing.
If the lzip compressed version of a file already exists, the file is
skipped unless the @samp{--force} option is given. In this case, if the
@ -743,7 +783,7 @@ 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
when possible, ownership of the file just as @samp{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).
@ -785,7 +825,14 @@ Quiet operation. Suppress all messages.
@item -r
@itemx --recursive
Operate recursively on directories.
For each directory operand, read and process all files in that
directory, recursively. Follow symbolic links in the command line, but
skip symlinks that are encountered recursively.
@item -R
@itemx --dereference-recursive
For each directory operand, read and process all files in that
directory, recursively, following all symbolic links.
@item -v
@itemx --verbose