agrep man page on NetBSD
[printable version]
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 pat‐
terns 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. Simi‐
larly, 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 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 dele‐
tion (a missing character) and an insertion (an extra charac‐
ter) 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 “\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 mak‐
ing 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 envi‐
ronment 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 exten‐
sions.
REPORTING BUGS
Report bugs to the TRE mailing list ⟨tre-general@lists.laurikari.net⟩.
COPYRIGHT
Copyright © 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
[top]
_ _ _
| | | | | |
| | | | | |
__ | | __ __ | | __ __ | | __
\ \| |/ / \ \| |/ / \ \| |/ /
\ \ / / \ \ / / \ \ / /
\ / \ / \ /
\_/ \_/ \_/
More information is available in HTML format for server NetBSD
List of man pages available for NetBSD
Copyright (c) for man pages and the logo by the respective OS vendor.
For those who want to learn more, the polarhome community provides shell access and support.
[legal]
[privacy]
[GNU]
[policy]
[cookies]
[netiquette]
[sponsors]
[FAQ]
Polarhome, production since 1999.
Member of Polarhome portal.
Based on Fawad Halim's script.
....................................................................
|
Vote for polarhome
|