/[pcre]/code/trunk/doc/pcregrep.1
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revision 379 by ph10, Mon Mar 2 20:30:05 2009 UTC revision 392 by ph10, Tue Mar 17 21:30:30 2009 UTC
# Line 25  If you attempt to use delimiters (for ex Line 25  If you attempt to use delimiters (for ex
25  slashes, as is common in Perl scripts), they are interpreted as part of the  slashes, as is common in Perl scripts), they are interpreted as part of the
26  pattern. Quotes can of course be used to delimit patterns on the command line  pattern. Quotes can of course be used to delimit patterns on the command line
27  because they are interpreted by the shell, and indeed they are required if a  because they are interpreted by the shell, and indeed they are required if a
28  pattern contains white space or shell metacharacters.  pattern contains white space or shell metacharacters.
29  .P  .P
30  The first argument that follows any option settings is treated as the single  The first argument that follows any option settings is treated as the single
31  pattern to be matched when neither \fB-e\fP nor \fB-f\fP is present.  pattern to be matched when neither \fB-e\fP nor \fB-f\fP is present.
# Line 50  Patterns are limited to 8K or BUFSIZ cha Line 50  Patterns are limited to 8K or BUFSIZ cha
50  BUFSIZ is defined in \fB<stdio.h>\fP. When there is more than one pattern  BUFSIZ is defined in \fB<stdio.h>\fP. When there is more than one pattern
51  (specified by the use of \fB-e\fP and/or \fB-f\fP), each pattern is applied to  (specified by the use of \fB-e\fP and/or \fB-f\fP), each pattern is applied to
52  each line in the order in which they are defined, except that all the \fB-e\fP  each line in the order in which they are defined, except that all the \fB-e\fP
53  patterns are tried before the \fB-f\fP patterns.  patterns are tried before the \fB-f\fP patterns.
54  .P  .P
55  By default, as soon as one pattern matches (or fails to match when \fB-v\fP is  By default, as soon as one pattern matches (or fails to match when \fB-v\fP is
56  used), no further patterns are considered. However, if \fB--colour\fP (or  used), no further patterns are considered. However, if \fB--colour\fP (or
# Line 62  matches on the same line can be found. I Line 62  matches on the same line can be found. I
62  all tried on the remainder of the line, but patterns that follow the one that  all tried on the remainder of the line, but patterns that follow the one that
63  matched are not tried on the earlier part of the line.  matched are not tried on the earlier part of the line.
64  .P  .P
65  This is the same behaviour as GNU grep, but it does mean that the order in  This is the same behaviour as GNU grep, but it does mean that the order in
66  which multiple patterns are specified can affect the output when one of the  which multiple patterns are specified can affect the output when one of the
67  above options is used.  above options is used.
68  .P  .P
69  Patterns that can match an empty string are accepted, but empty string  Patterns that can match an empty string are accepted, but empty string
70  matches are not recognized. An example is the pattern "(super)?(man)?", in  matches are not recognized. An example is the pattern "(super)?(man)?", in
71  which all components are optional. This pattern finds all occurrences of both  which all components are optional. This pattern finds all occurrences of both
72  "super" and "man"; the output differs from matching with "super|man" when only  "super" and "man"; the output differs from matching with "super|man" when only
73  the matching substrings are being shown.  the matching substrings are being shown.
# Line 130  This option specifies under what circums Line 130  This option specifies under what circums
130  a pattern should be coloured in the output. By default, the output is not  a pattern should be coloured in the output. By default, the output is not
131  coloured. The value (which is optional, see above) may be "never", "always", or  coloured. The value (which is optional, see above) may be "never", "always", or
132  "auto". In the latter case, colouring happens only if the standard output is  "auto". In the latter case, colouring happens only if the standard output is
133  connected to a terminal. More resources are used when colouring is enabled,  connected to a terminal. More resources are used when colouring is enabled,
134  because \fBpcregrep\fP has to search for all possible matches in a line, not  because \fBpcregrep\fP has to search for all possible matches in a line, not
135  just one, in order to colour them all.  just one, in order to colour them all.
136    
137  The colour that is used can be specified by setting the environment variable  The colour that is used can be specified by setting the environment variable
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