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Zgrep: search compressed files for a regular expression


Zgrep - search compressed files for a regular expression


zgrep [options] <pattern> [files]


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.


--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
Report bugs to zutils-bug@nongnu.org Zutils home page: //www.nongnu.org/zutils/zutils.html
Copyright (C) 2011 Antonio Diaz Diaz. License GPLv3+: GNU GPL version 3 or later <//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. ZGREP(1)

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