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.\" DO NOT MODIFY THIS FILE! It was generated by help2man 1.46.1.
.TH ZGREP "1" "January 2019" "zgrep (zutils) 1.8" "User Commands"
.SH NAME
zgrep \- search compressed files for a regular expression
.SH SYNOPSIS
.B zgrep
[\fI\,options\/\fR] \fI\,<pattern> \/\fR[\fI\,files\/\fR]
.SH DESCRIPTION
Zgrep is a front end to the grep program that allows transparent search
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
formats supported.
.PP
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
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
.TP
\fB\-\-help\fR
display this help and exit
.TP
\fB\-V\fR, \fB\-\-version\fR
output version information and exit
.TP
\fB\-a\fR, \fB\-\-text\fR
treat all files as text
.TP
\fB\-A\fR, \fB\-\-after\-context=\fR<n>
print <n> lines of trailing context
.TP
\fB\-b\fR, \fB\-\-byte\-offset\fR
print the byte offset of each line
.TP
\fB\-B\fR, \fB\-\-before\-context=\fR<n>
print <n> lines of leading context
.TP
\fB\-c\fR, \fB\-\-count\fR
only print a count of matching lines per file
.TP
\fB\-C\fR, \fB\-\-context=\fR<n>
print <n> lines of output context
.TP
\fB\-\-color[=\fR<when>]
show matched strings in color
.TP
\fB\-e\fR, \fB\-\-regexp=\fR<pattern>
use <pattern> as the pattern to match
.TP
\fB\-E\fR, \fB\-\-extended\-regexp\fR
<pattern> is an extended regular expression
.TP
\fB\-f\fR, \fB\-\-file=\fR<file>
obtain patterns from <file>
.TP
\fB\-F\fR, \fB\-\-fixed\-strings\fR
<pattern> is a set of newline\-separated strings
.TP
\fB\-h\fR, \fB\-\-no\-filename\fR
suppress the prefixing filename on output
.TP
\fB\-H\fR, \fB\-\-with\-filename\fR
print the filename for each match
.TP
\fB\-i\fR, \fB\-\-ignore\-case\fR
ignore case distinctions
.TP
\fB\-I\fR
ignore binary files
.TP
\fB\-l\fR, \fB\-\-files\-with\-matches\fR
only print names of files containing matches
.TP
\fB\-L\fR, \fB\-\-files\-without\-match\fR
only print names of files containing no matches
.TP
\fB\-m\fR, \fB\-\-max\-count=\fR<n>
stop after <n> matches
.TP
\fB\-M\fR, \fB\-\-format=\fR<list>
process only the formats in <list>
.TP
\fB\-n\fR, \fB\-\-line\-number\fR
print the line number of each line
.TP
\fB\-N\fR, \fB\-\-no\-rcfile\fR
don't read runtime configuration file
.TP
\fB\-o\fR, \fB\-\-only\-matching\fR
show only the part of a line matching <pattern>
.TP
\fB\-O\fR, \fB\-\-force\-format=\fR<fmt>
force given format (bz2, gz, lz, xz)
.TP
\fB\-q\fR, \fB\-\-quiet\fR
suppress all messages
.TP
\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
\fB\-v\fR, \fB\-\-invert\-match\fR
select non\-matching lines
.TP
\fB\-\-verbose\fR
verbose mode (show error messages)
.TP
\fB\-w\fR, \fB\-\-word\-regexp\fR
match only whole words
.TP
\fB\-x\fR, \fB\-\-line\-regexp\fR
match only whole lines
.TP
\fB\-\-bz2=\fR<command>
set compressor and options for bzip2 format
.TP
\fB\-\-gz=\fR<command>
set compressor and options for gzip format
.TP
\fB\-\-lz=\fR<command>
set compressor and options for lzip format
.TP
\fB\-\-xz=\fR<command>
set compressor and options for xz format
.PP
Numbers may be followed by a multiplier: k = kB = 10^3 = 1000,
Ki = KiB = 2^10 = 1024, M = 10^6, Mi = 2^20, G = 10^9, Gi = 2^30, etc...
.SH "REPORTING BUGS"
Report bugs to zutils\-bug@nongnu.org
.br
Zutils home page: http://www.nongnu.org/zutils/zutils.html
.SH COPYRIGHT
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.
There is NO WARRANTY, to the extent permitted by law.
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