/[pcre]/code/trunk/doc/pcregrep.txt
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Contents of /code/trunk/doc/pcregrep.txt

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1 NAME
2 pcregrep - a grep with Perl-compatible regular expressions.
3
4
5
6 SYNOPSIS
7 pcregrep [-Vchilnsvx] pattern [file] ...
8
9
10
11 DESCRIPTION
12 pcregrep searches files for character patterns, in the same
13 way as other grep commands do, but it uses the PCRE regular
14 expression library to support patterns that are compatible
15 with the regular expressions of Perl 5. See pcre(3) for a
16 full description of syntax and semantics.
17
18 If no files are specified, pcregrep reads the standard
19 input. By default, each line that matches the pattern is
20 copied to the standard output, and if there is more than one
21 file, the file name is printed before each line of output.
22 However, there are options that can change how pcregrep
23 behaves.
24
25 Lines are limited to BUFSIZ characters. BUFSIZ is defined in
26 <stdio.h>. The newline character is removed from the end of
27 each line before it is matched against the pattern.
28
29
30
31 OPTIONS
32 -V Write the version number of the PCRE library being
33 used to the standard error stream.
34
35 -c Do not print individual lines; instead just print
36 a count of the number of lines that would other-
37 wise have been printed. If several files are
38 given, a count is printed for each of them.
39
40 -h Suppress printing of filenames when searching mul-
41 tiple files.
42
43 -i Ignore upper/lower case distinctions during com-
44 parisons.
45
46 -l Instead of printing lines from the files, just
47 print the names of the files containing lines that
48 would have been printed. Each file name is printed
49 once, on a separate line.
50
51 -n Precede each line by its line number in the file.
52
53 -s Work silently, that is, display nothing except
54 error messages. The exit status indicates whether
55 any matches were found.
56
57 -v Invert the sense of the match, so that lines which
58 do not match the pattern are now the ones that are
59 found.
60
61 -x Force the pattern to be anchored (it must start
62 matching at the beginning of the line) and in
63 addition, require it to match the entire line.
64 This is equivalent to having ^ and $ characters at
65 the start and end of each alternative branch in
66 the regular expression.
67
68
69
70 SEE ALSO
71 pcre(3), Perl 5 documentation
72
73
74
75
76
77 DIAGNOSTICS
78 Exit status is 0 if any matches were found, 1 if no matches
79 were found, and 2 for syntax errors or inacessible files
80 (even if matches were found).
81
82
83
84 AUTHOR
85 Philip Hazel <ph10@cam.ac.uk>
86 Copyright (c) 1997-2000 University of Cambridge.
87

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