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FINDP.MAN
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1983-09-07
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.im man.im
.NM findp find patterns in text
.SY findp pattern [input-file ...]
.FU
.ital findp
reads its input a line at a time and writes to its output those
lines that match the specified text pattern.
A text pattern is a concatenation of the following elements:
.nf
.in 0
.br
c literal character c
? any character except newline
% beginning of line
$ end of line (null string before newline)
[...] character class (any one of these characters)
[^...] negated character class (all but these characters)
* closure (zero or more occurrences of previous pattern)
\@c escaped character (e.g., \@%, \@[, \@*)
.br
.fi
.in 4
Special meaning of characters in a text pattern is lost when escaped, inside
[...]
(except
\@]),
or for:
.br
.in 0
.nf
% not at beginning
$ not at end
* at beginning
.br
.in 4
.fi
A character class consists of zero or more of the following elements,
surrounded by
[
and
] :
.br
.in 0
.nf
c literal character c, including [
c1-c2 range of characters (digits, lower or upper case letters)
^ negated character class if at beginning
\@c escaped character (e.g., \@^ \@- \@\@ \@])
.br
.in 4
.fi
Special meaning of characters in a character class is lost when escaped
or for:
.br
.in 0
.nf
^ not at beginning
- at beginning or end
.br
.in 4
.fi
An escape sequence consists of the character
\@
followed by a single character:
.br
.in 0
.nf
\@n newline
\@t tab
\@c c (including \@\@)
.in 4
.fi
.EG
To print lines ending in a Pascal keyword or identifier:
.Q1
findp [a-zA-Z][a-zA-Z0-9]*$
.Q2