zgrep − search compressed files for a regular expression
zgrep [options] <pattern> [files]
zgrep is a front end to the program grep that allows transparent search on any combination of compressed and uncompressed files. If any file given is compressed, its decompressed content is used. If a file given 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. If a file fails to decompress, zgrep continues searching the rest of the files.
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 compressed format.
If no files are specified, recursive searches examine the current working directory, and nonrecursive searches read standard input.
’zgrep −−verbose −V’ prints the version of the grep program used.
The formats supported are bzip2, gzip, lzip, xz, and zstd.
Exit status is 0 if match, 1 if no match, 2 if trouble. Some options only work if the grep program used supports them.
|
−−help |
display this help and exit |
−V, −−version
output version information and exit
−a, −−text
treat all files as text
−A, −−after−context=<n>
print <n> lines of trailing context
−b, −−byte−offset
print the byte offset of each line
−B, −−before−context=<n>
print <n> lines of leading context
−c, −−count
only print a count of matching lines per file
−C, −−context=<n>
print <n> lines of output context
−−color[=<when>]
show matched strings in color
−e, −−regexp=<pattern>
use <pattern> as the pattern to match
−E, −−extended−regexp
<pattern> is an extended regular expression
−f, −−file=<file>
obtain patterns from <file>
−F, −−fixed−strings
<pattern> is a set of newline−separated strings
−G, −−basic−regexp
<pattern> is a basic regular expression (default)
−h, −−no−filename
suppress the prefixing file name on output
−H, −−with−filename
print the file name for each match
−i, −−ignore−case
ignore case distinctions
|
−I |
ignore binary files |
−l, −−files−with−matches
only print names of files containing matches
−L, −−files−without−match
only print names of files containing no matches
−−label=<label>
use <label> as file name for standard input
−−line−buffered
flush output on every line
−m, −−max−count=<n>
stop after <n> matches
−M, −−format=<list>
process only the formats in <list>
−n, −−line−number
print the line number of each line
−N, −−no−rcfile
don’t read runtime configuration file
−o, −−only−matching
show only the part of a line matching <pattern>
−O, −−force−format=<fmt>
force the input format
−P, −−perl−regexp
<pattern> is a Perl regular expression
−q, −−quiet, −−silent
suppress all messages
−r, −−recursive
operate recursively on directories
−R, −−dereference−recursive
recursively follow symbolic links
−s, −−no−messages
suppress error messages
−T, −−initial−tab
make tabs line up (if needed)
−U, −−binary
don’t strip CR characters at EOL (DOS/Windows)
−v, −−invert−match
select non−matching lines
−−verbose
verbose mode (show error messages)
−w, −−word−regexp
match only whole words
−x, −−line−regexp
match only whole lines
−Z, −−null
print 0 byte (ASCII NUL) after file name
−−bz2=<command>
set compressor and options for bzip2 format
−−gz=<command>
set compressor and options for gzip format
−−lz=<command>
set compressor and options for lzip format
−−xz=<command>
set compressor and options for xz format
−−zst=<command>
set compressor and options for zstd format
Valid formats for options ’−M’ and ’−O’ are ’bz2’, ’gz’, ’lz’, ’xz’, ’zst’, and ’un’ for uncompressed.
Numbers may be followed by a multiplier: k = kB = 10ˆ3 = 1000, Ki = KiB = 2ˆ10 = 1024, M = 10ˆ6, Mi = 2ˆ20, G = 10ˆ9, Gi = 2ˆ30, etc...
Report bugs to
zutils−[email protected]
Zutils home page:
http://www.nongnu.org/zutils/zutils.html
Copyright ©
2023 Antonio Diaz Diaz. License GPLv2+: GNU GPL version 2 or
later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and
redistribute it. There is NO WARRANTY, to the extent
permitted by law.
The full documentation for zgrep is maintained as a Texinfo manual. If the info and zgrep programs are properly installed at your site, the command
info zutils
should give you access to the complete manual.