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 non-compressed files. If any given file is
compressed, its uncompressed 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 compressors. If no files
are specified, data is 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 compressed with the same compressor. The supported
compressors 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
- -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
- -n, --line-number
- print the line number of each line
- -o, --only-matching
- show only the part of a line matching <pattern>
- -q, --quiet
- suppress all messages
- -r, --recursive
- operate recursively on directories
- -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
REPORTING BUGS¶
Report bugs to zutils-bug@nongnu.org
Zutils home page:
http://www.nongnu.org/zutils/zutils.html
COPYRIGHT¶
Copyright © 2011 Antonio Diaz Diaz. License GPLv3+: GNU GPL version 3 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.
