pcregrep.txt
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- NAME
- pcregrep - a grep with Perl-compatible regular expressions.
- SYNOPSIS
- pcregrep [-Vcfhilnrsvx] pattern [file] ...
- DESCRIPTION
- pcregrep searches files for character patterns, in the same
- way as other grep commands do, but it uses the PCRE regular
- expression library to support patterns that are compatible
- with the regular expressions of Perl 5. See pcre(3) for a
- full description of syntax and semantics.
- If no files are specified, pcregrep reads the standard
- input. By default, each line that matches the pattern is
- copied to the standard output, and if there is more than one
- file, the file name is printed before each line of output.
- However, there are options that can change how pcregrep
- behaves.
- Lines are limited to BUFSIZ characters. BUFSIZ is defined in
- <stdio.h>. The newline character is removed from the end of
- each line before it is matched against the pattern.
- OPTIONS
- -V Write the version number of the PCRE library being
- used to the standard error stream.
- -c Do not print individual lines; instead just print
- a count of the number of lines that would other-
- wise have been printed. If several files are
- given, a count is printed for each of them.
- -ffilename
- Read patterns from the file, one per line, and
- match all patterns against each line. There is a
- maximum of 100 patterns. Trailing white space is
- removed, and blank lines are ignored. An empty
- file contains no patterns and therefore matches
- nothing.
- -h Suppress printing of filenames when searching mul-
- tiple files.
- -i Ignore upper/lower case distinctions during com-
- parisons.
- -l Instead of printing lines from the files, just
- print the names of the files containing lines that
- would have been printed. Each file name is printed
- once, on a separate line.
- -n Precede each line by its line number in the file.
- -r If any file is a directory, recursively scan the
- files it contains. Without -r a directory is
- scanned as a normal file.
- -s Work silently, that is, display nothing except
- error messages. The exit status indicates whether
- any matches were found.
- -v Invert the sense of the match, so that lines which
- do not match the pattern are now the ones that are
- found.
- -x Force the pattern to be anchored (it must start
- matching at the beginning of the line) and in
- addition, require it to match the entire line.
- This is equivalent to having ^ and $ characters at
- the start and end of each alternative branch in
- the regular expression.
- SEE ALSO
- pcre(3), Perl 5 documentation
- DIAGNOSTICS
- Exit status is 0 if any matches were found, 1 if no matches
- were found, and 2 for syntax errors or inacessible files
- (even if matches were found).
- AUTHOR
- Philip Hazel <ph10@cam.ac.uk>
- Last updated: 15 August 2001
- Copyright (c) 1997-2001 University of Cambridge.