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authorhongbotian <hongbo.tianhongbo@huawei.com>2015-11-30 03:10:21 -0500
committerhongbotian <hongbo.tianhongbo@huawei.com>2015-11-30 03:10:21 -0500
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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
-\fBpcregrep\fR 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, \fBpcregrep\fR 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 \fBpcregrep\fR 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-V\fR
-Write the version number of the PCRE library being used to the standard error
-stream.
-.TP
-\fB-c\fR
-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-f\fIfilename\fR
-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-h\fR
-Suppress printing of filenames when searching multiple files.
-.TP
-\fB-i\fR
-Ignore upper/lower case distinctions during comparisons.
-.TP
-\fB-l\fR
-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-n\fR
-Precede each line by its line number in the file.
-.TP
-\fB-r\fR
-If any file is a directory, recursively scan the files it contains. Without
-\fB-r\fR a directory is scanned as a normal file.
-.TP
-\fB-s\fR
-Work silently, that is, display nothing except error messages.
-The exit status indicates whether any matches were found.
-.TP
-\fB-v\fR
-Invert the sense of the match, so that lines which do \fInot\fR match the
-pattern are now the ones that are found.
-.TP
-\fB-x\fR
-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.