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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.
versity of Cambridge for use on Unix systems connected to
the Internet. It is freely available
under the terms of
the GNU General Public Licence. In style it
is similar to
Smail 3, but its facilities are more
extensive, and in
particular it has some defences against
mail bombs and
unsolicited junk mail, in the form of
options for refusing
messages from particular hosts, networks,
or senders.
Exim's command line takes the standard
Unix form of a
sequence of options, each starting with a
hyphen charac-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.
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