NAME

       zgrep - search compressed files for a regular expression

SYNOPSIS

       zgrep [options] <pattern> [files]

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.

       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 formats supported are bzip2, gzip, lzip and xz.

       Exit status is 0 if match, 1 if no match, 2 if trouble.

OPTIONS

       --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

       -h, --no-filename
              suppress the prefixing filename on output

       -H, --with-filename
              print the filename 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

       -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 given format (bz2, gz, lz, xz)

       -q, --quiet
              suppress all messages

       -r, --recursive
              operate recursively on directories

       -R, --dereference-recursive
              recursively follow symbolic links

       -s, --no-messages
              suppress error messages

       -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

       --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

       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...

REPORTING BUGS

       Report bugs to zutils-bug@nongnu.org
       Zutils home page: http://www.nongnu.org/zutils/zutils.html

COPYRIGHT

       Copyright   ©   2019   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.