pcregrep.1
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- .TH PCREGREP 1
- .SH NAME
- pcregrep - a grep with Perl-compatible regular expressions.
- .SH SYNOPSIS
- .B pcregrep [-Vcfhilnrsvx] pattern [file] ...
- .SH DESCRIPTION
- fBpcregrepfR 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
- fBpcre(3)fR for a full description of syntax and semantics.
- If no files are specified, fBpcregrepfR 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 fBpcregrepfR behaves.
- Lines are limited to BUFSIZ characters. BUFSIZ is defined in fB<stdio.h>fR.
- The newline character is removed from the end of each line before it is matched
- against the pattern.
- .SH OPTIONS
- .TP 10
- fB-VfR
- Write the version number of the PCRE library being used to the standard error
- stream.
- .TP
- fB-cfR
- Do not print individual lines; instead just print a count of the number of
- lines that would otherwise have been printed. If several files are given, a
- count is printed for each of them.
- .TP
- fB-ffIfilenamefR
- 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.
- .TP
- fB-hfR
- Suppress printing of filenames when searching multiple files.
- .TP
- fB-ifR
- Ignore upper/lower case distinctions during comparisons.
- .TP
- fB-lfR
- 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.
- .TP
- fB-nfR
- Precede each line by its line number in the file.
- .TP
- fB-rfR
- If any file is a directory, recursively scan the files it contains. Without
- fB-rfR a directory is scanned as a normal file.
- .TP
- fB-sfR
- Work silently, that is, display nothing except error messages.
- The exit status indicates whether any matches were found.
- .TP
- fB-vfR
- Invert the sense of the match, so that lines which do fInotfR match the
- pattern are now the ones that are found.
- .TP
- fB-xfR
- 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.
- .SH SEE ALSO
- fBpcre(3)fR, Perl 5 documentation
- .SH 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).
- .SH AUTHOR
- Philip Hazel <ph10@cam.ac.uk>
- Last updated: 15 August 2001
- .br
- Copyright (c) 1997-2001 University of Cambridge.