/[pcre]/code/trunk/doc/pcregrep.txt
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revision 61 by nigel, Sat Feb 24 21:39:58 2007 UTC revision 63 by nigel, Sat Feb 24 21:40:03 2007 UTC
# Line 2  NAME Line 2  NAME
2       pcregrep - a grep with Perl-compatible regular expressions.       pcregrep - a grep with Perl-compatible regular expressions.
3    
4    
   
5  SYNOPSIS  SYNOPSIS
6       pcregrep [-Vcfhilnrsvx] pattern [file] ...       pcregrep [-Vcfhilnrsuvx] [long options] [pattern] [file1
   
7    
8    
9  DESCRIPTION  DESCRIPTION
10    
11       pcregrep searches files for character patterns, in the  same       pcregrep searches files for character patterns, in the  same
12       way  as other grep commands do, but it uses the PCRE regular       way  as other grep commands do, but it uses the PCRE regular
13       expression library to support patterns that  are  compatible       expression library to support patterns that  are  compatible
14       with  the  regular  expressions of Perl 5. See pcre(3) for a       with  the regular expressions of Perl 5. See pcrepattern for
15       full description of syntax and semantics.       a full description of syntax and semantics  of  the  regular
16         expressions that PCRE supports.
17    
18         A pattern must be specified on the command line  unless  the
19         -f option is used (see below).
20    
21       If no files  are  specified,  pcregrep  reads  the  standard       If no files  are  specified,  pcregrep  reads  the  standard
22       input.  By  default,  each  line that matches the pattern is       input.  By  default,  each  line that matches the pattern is
# Line 27  DESCRIPTION Line 30  DESCRIPTION
30       each line before it is matched against the pattern.       each line before it is matched against the pattern.
31    
32    
   
33  OPTIONS  OPTIONS
34    
35    
36       -V        Write the version number of the PCRE library being       -V        Write the version number of the PCRE library being
37                 used to the standard error stream.                 used to the standard error stream.
38    
# Line 38  OPTIONS Line 42  OPTIONS
42                 given, a count is printed for each of them.                 given, a count is printed for each of them.
43    
44       -ffilename       -ffilename
45                 Read patterns from the file,  one  per  line,  and                 Read a number of patterns from the file,  one  per
46                 match  all  patterns against each line. There is a                 line,  and  match all of them against each line of
47                 maximum of 100 patterns. Trailing white  space  is                 input. A line is output if  any  of  the  patterns
48                 removed,  and  blank  lines  are ignored. An empty                 match  it.   When  -f is used, no pattern is taken
49                 file contains no patterns  and  therefore  matches                 from the command line; all arguments  are  treated
50                 nothing.                 as file names. There is a maximum of 100 patterns.
51                   Trailing white space is removed, and  blank  lines
52                   are  ignored.  An  empty file contains no patterns
53                   and therefore matches nothing.
54    
55       -h        Suppress printing of filenames when searching mul-       -h        Suppress printing of filenames when searching mul-
56                 tiple files.                 tiple files.
# Line 52  OPTIONS Line 59  OPTIONS
59                 parisons.                 parisons.
60    
61       -l        Instead of printing lines  from  the  files,  just       -l        Instead of printing lines  from  the  files,  just
   
62                 print the names of the files containing lines that                 print the names of the files containing lines that
63                 would have been printed. Each file name is printed                 would have been printed. Each file name is printed
64                 once, on a separate line.                 once, on a separate line.
# Line 67  OPTIONS Line 73  OPTIONS
73                 error messages.  The exit status indicates whether                 error messages.  The exit status indicates whether
74                 any matches were found.                 any matches were found.
75    
76         -u        Operate in UTF-8 mode. This  option  is  available
77                   only if PCRE has been compiled with UTF-8 support.
78                   Both the pattern and each subject line are assumed
79                   to be valid strings of UTF-8 characters.
80    
81       -v        Invert the sense of the match, so that lines which       -v        Invert the sense of the match, so that lines which
82                 do not match the pattern are now the ones that are                 do not match the pattern are now the ones that are
83                 found.                 found.
# Line 79  OPTIONS Line 90  OPTIONS
90                 the regular expression.                 the regular expression.
91    
92    
93    LONG OPTIONS
94    
95  SEE ALSO       Long forms of all the options are available, as in GNU grep.
96       pcre(3), Perl 5 documentation       They are shown in the following table:
   
97    
98           -c   --count
99           -h   --no-filename
100           -i   --ignore-case
101           -l   --files-with-matches
102           -n   --line-number
103           -r   --recursive
104           -s   --no-messages
105           -u   --utf-8
106           -V   --version
107           -v   --invert-match
108           -x   --line-regex
109           -x   --line-regexp
110    
111         In addition, --file=filename is  equivalent  to  -ffilename,
112         and --help shows the list of options and then exits.
113    
114    
115  DIAGNOSTICS  DIAGNOSTICS
116    
117       Exit status is 0 if any matches were found, 1 if no  matches       Exit status is 0 if any matches were found, 1 if no  matches
118       were  found,  and  2  for syntax errors or inacessible files       were  found,  and  2  for syntax errors or inacessible files
119       (even if matches were found).       (even if matches were found).
# Line 95  DIAGNOSTICS Line 121  DIAGNOSTICS
121    
122    
123  AUTHOR  AUTHOR
124    
125       Philip Hazel <ph10@cam.ac.uk>       Philip Hazel <ph10@cam.ac.uk>
126         University Computing Service
127         Cambridge CB2 3QG, England.
128    
129       Last updated: 15 August 2001  Last updated: 03 February 2003
130       Copyright (c) 1997-2001 University of Cambridge.  Copyright (c) 1997-2003 University of Cambridge.
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