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1 <HTML>
2 <HEAD>
3 <TITLE>pcregrep specification</TITLE>
4 </HEAD>
5 <body bgcolor="#FFFFFF" text="#00005A">
6 <H1>pcregrep specification</H1>
7 This HTML document has been generated automatically from the original man page.
8 If there is any nonsense in it, please consult the man page in case the
9 conversion went wrong.
10 <UL>
11 <LI><A NAME="TOC1" HREF="#SEC1">NAME</A>
12 <LI><A NAME="TOC2" HREF="#SEC2">SYNOPSIS</A>
13 <LI><A NAME="TOC3" HREF="#SEC3">DESCRIPTION</A>
14 <LI><A NAME="TOC4" HREF="#SEC4">OPTIONS</A>
15 <LI><A NAME="TOC5" HREF="#SEC5">SEE ALSO</A>
16 <LI><A NAME="TOC6" HREF="#SEC6">DIAGNOSTICS</A>
17 <LI><A NAME="TOC7" HREF="#SEC7">AUTHOR</A>
18 </UL>
19 <LI><A NAME="SEC1" HREF="#TOC1">NAME</A>
20 <P>
21 pcregrep - a grep with Perl-compatible regular expressions.
22 </P>
23 <LI><A NAME="SEC2" HREF="#TOC1">SYNOPSIS</A>
24 <P>
25 <B>pcregrep [-Vcfhilnrsvx] pattern [file] ...</B>
26 </P>
27 <LI><A NAME="SEC3" HREF="#TOC1">DESCRIPTION</A>
28 <P>
29 <B>pcregrep</B> searches files for character patterns, in the same way as other
30 grep commands do, but it uses the PCRE regular expression library to support
31 patterns that are compatible with the regular expressions of Perl 5. See
32 <B>pcre(3)</B> for a full description of syntax and semantics.
33 </P>
34 <P>
35 If no files are specified, <B>pcregrep</B> reads the standard input. By default,
36 each line that matches the pattern is copied to the standard output, and if
37 there is more than one file, the file name is printed before each line of
38 output. However, there are options that can change how <B>pcregrep</B> behaves.
39 </P>
40 <P>
41 Lines are limited to BUFSIZ characters. BUFSIZ is defined in <B>&#60;stdio.h&#62;</B>.
42 The newline character is removed from the end of each line before it is matched
43 against the pattern.
44 </P>
45 <LI><A NAME="SEC4" HREF="#TOC1">OPTIONS</A>
46 <P>
47 <B>-V</B>
48 Write the version number of the PCRE library being used to the standard error
49 stream.
50 </P>
51 <P>
52 <B>-c</B>
53 Do not print individual lines; instead just print a count of the number of
54 lines that would otherwise have been printed. If several files are given, a
55 count is printed for each of them.
56 </P>
57 <P>
58 <PRE>
59 versity of Cambridge for use on Unix systems connected to
60 the Internet. It is freely available under the terms of
61 the GNU General Public Licence. In style it is similar to
62 Smail 3, but its facilities are more extensive, and in
63 particular it has some defences against mail bombs and
64 unsolicited junk mail, in the form of options for refusing
65 messages from particular hosts, networks, or senders.
66 </PRE>
67 </P>
68 <P>
69 <PRE>
70 Exim's command line takes the standard Unix form of a
71 sequence of options, each starting with a hyphen charac\fB-f<I>filename</I>
72 </PRE>
73 Read patterns from the file, one per line, and match all patterns against each
74 line. There is a maximum of 100 patterns. Trailing white space is removed, and
75 blank lines are ignored. An empty file contains no patterns and therefore
76 matches nothing.
77 </P>
78 <P>
79 <B>-h</B>
80 Suppress printing of filenames when searching multiple files.
81 </P>
82 <P>
83 <B>-i</B>
84 Ignore upper/lower case distinctions during comparisons.
85 </P>
86 <P>
87 <B>-l</B>
88 Instead of printing lines from the files, just print the names of the files
89 containing lines that would have been printed. Each file name is printed
90 once, on a separate line.
91 </P>
92 <P>
93 <B>-n</B>
94 Precede each line by its line number in the file.
95 </P>
96 <P>
97 <B>-r</B>
98 If any file is a directory, recursively scan the files it contains. Without
99 <B>-r</B> a directory is scanned as a normal file.
100 </P>
101 <P>
102 <B>-s</B>
103 Work silently, that is, display nothing except error messages.
104 The exit status indicates whether any matches were found.
105 </P>
106 <P>
107 <B>-v</B>
108 Invert the sense of the match, so that lines which do <I>not</I> match the
109 pattern are now the ones that are found.
110 </P>
111 <P>
112 <B>-x</B>
113 Force the pattern to be anchored (it must start matching at the beginning of
114 the line) and in addition, require it to match the entire line. This is
115 equivalent to having ^ and $ characters at the start and end of each
116 alternative branch in the regular expression.
117 </P>
118 <LI><A NAME="SEC5" HREF="#TOC1">SEE ALSO</A>
119 <P>
120 <B>pcre(3)</B>, Perl 5 documentation
121 </P>
122 <LI><A NAME="SEC6" HREF="#TOC1">DIAGNOSTICS</A>
123 <P>
124 Exit status is 0 if any matches were found, 1 if no matches were found, and 2
125 for syntax errors or inacessible files (even if matches were found).
126 </P>
127 <LI><A NAME="SEC7" HREF="#TOC1">AUTHOR</A>
128 <P>
129 Philip Hazel &#60;ph10@cam.ac.uk&#62;
130 </P>
131 <P>
132 Last updated: 15 August 2001
133 <BR>
134 Copyright (c) 1997-2001 University of Cambridge.

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