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NetBSD 6.1.5 - man page for agrep (netbsd section 1)

AGREP(1)			   BSD General Commands Manual				 AGREP(1)

     agrep -- print lines approximately matching a pattern

     agrep [options] pattern [files]

     Searches for approximate matches of pattern in each FILE or standard input.

   Regexp selection and interpretation
     -e pattern, --regexp=pattern
		 Use PATTERN as a regular expression; useful to protect patterns beginning with

     -i, --ignore-case
		 Ignore case distinctions (as defined by the current locale) in pattern and input

     -k, --literal
		 Treat pattern as a literal string, that is, a fixed string with no special char-

     -w, --word-regexp
		 Force pattern to match only whole words.  A ``whole word'' is a substring which
		 either starts at the beginning or the record or is preceded by a non-word con-
		 stituent character.  Similarly, the substring must either end at the end of the
		 record or be followed by a non-word constituent character.  Word-constituent
		 characters are alphanumerics (as defined by the current locale) and the under-
		 score character.  Note that the non-word constituent characters must surround
		 the match; they cannot be counted as errors.

   Approximate matching settings
     -D num, --delete-cost=num
		 Set cost of missing characters to num.

     -I num, --insert-cost=num
		 Set cost of extra characters to num.

     -S num, --substitue-cost=num
		 Set cost of incorrect characters to num.  Note that a deletion (a missing char-
		 acter) and an insertion (an extra character) together constitute a substituted
		 character, but the cost will be the that of a deletion and an insertion added
		 together.  Thus, if the const of a substitution is set to be larger than the sum
		 of the costs of deletion and insertion, direct substitutions will never be done.

     -E -num, --max-errors=num
		 Select records that have at most num errors.

     -# 	 Select records that have at most # errors (# is a digit between 0 and 9).

     -d -pattern, --delimiter=pattern
		 Set the record delimiter regular expression to pattern.  The text between two
		 delimiters, before the first delimiter, and after the last delimiter is consid-
		 ered to be a record.  The default record delimiter is the regexp ``\n'', so by
		 default a record is a line.  pattern can be any regular expression that does not
		 match the empty string.  For example, using -d file ... defines mail messages as
		 records in a Mailbox format file.

     -v, --invert-match
		 Select non-matching records instead of matching records.

     -V, --version
		 Print version information and exit.

     -y, --nothing
		 Does nothing.	This options exists only for compatibility with the non-free
		 agrep program.

     --help	 Display a brief help message and exit.

   Output control
     -B, --best-match
		 Only output the best matching records, that is, the records with the lowest
		 cost.	This is currently implemented by making two passes over the input files
		 and cannot be used when reading from standard input.

     --color, --colour
		 Highlight the matching strings in the output with a color marker.  The color
		 string is taken from the GREP_COLOR environment variable.  The default color is

     -c, --count
		 Only print a count of matching records per each input file, suppressing normal

     -h, --no-filename
		 Suppress the prefixing filename on output when multiple files are searched.

     -H, --with-filename
		 Prefix each output record with the name of the input file where the record was
		 read from.

     -l, --files-with-matches
		 Only print the name of each input file which contains at least one match, sup-
		 pressing normal output.  The scanning for each file will stop on the first

     -n, --record-number
		 Prefix each output record with its sequence number in the input file.	The num-
		 ber of the first record is 1.

     -q, --quiet, --silent
		 Do not write anything to standard output.  Exit immediately with zero exit sta-
		 tus if a match is found.

     -s, --show-cost
		 Print match cost with output.

		 Prefix each output record with the start and end offset of the first match
		 within the record.  The offset of the first character of the record is 0.  The
		 end position is given as the offset of the first character after the match.

     -M, --delimiter-after
		 By default, the record delimiter is the newline character and is output after
		 the matching record.  If -d is used, the record delimiter will be output before
		 the matching record.  This option causes the delimiter to be output after the
		 matching record.

     With no file, or when file is ``-'', agrep reads standard input.  If less than two files are
     given -h is assumed, otherwise -H is the default.

	   agrep -2 optimize foo.txt
     outputs all lines in file foo.txt that match ``optimize'' within two errors.  E.g. lines
     which contain ``optimise'', ``optmise'', and ``opitmize'' all match.

     Exit status is 0 if a match is found, 1 for no match, and 2 if there were errors.	If -E or
     -# is not specified, only exact matches are selected.

     pattern is a POSIX extended regular expression (ERE) with the TRE extensions.

     Report bugs to the TRE mailing list <tre-general@lists.laurikari.net>.

     Copyright (C) 2002-2004 Ville Laurikari.

     This is free software, and comes with ABSOLUTELY NO WARRANTY.  You are welcome to redis-
     tribute this software under certain conditions; see the source for the full license text.

BSD					November 21, 2004				      BSD

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