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

NAME

     agrep -- print lines approximately matching a pattern

SYNOPSIS

     agrep [options] pattern [files]

DESCRIPTION

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

OPTIONS

   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 files.

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

     -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 constituent character.  Similarly, the substring must either end at the end of the record or be fol-
		 lowed by a non-word constituent character.  Word-constituent characters are alphanumerics (as defined by the current locale) and
		 the underscore 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 character) 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).

   Miscellaneous
     -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 considered to be a record.  The default record delimiter is the regexp ``
'', 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 red.

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

     -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, suppressing normal output.  The scanning for each file
		 will stop on the first match.

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

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

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

     --show-position
		 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.

EXAMPLES

	   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.

DIAGNOSTICS

     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.

REPORTING BUGS

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

COPYRIGHT

     Copyright (C) 2002-2004 Ville Laurikari.

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

BSD
								 November 21, 2004							       BSD