mirror of git://git.suckless.org/sbase
97 lines
2.3 KiB
Groff
97 lines
2.3 KiB
Groff
.Dd 2015-10-08
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.Dt GREP 1
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.Os sbase
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.Sh NAME
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.Nm grep
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.Nd search files for patterns
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.Sh SYNOPSIS
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.Nm
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.Op Fl EFHchilnqsvx
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.Op Fl e Ar pattern
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.Op Fl f Ar file
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.Op Ar pattern
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.Op Ar file ...
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.Sh DESCRIPTION
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.Nm
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searches the input files for lines that match the
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.Ar pattern ,
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a regular expression as defined in
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.Xr regex 7 .
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By default each matching line is printed to stdout.
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If no
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.Ar file
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is given
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.Nm
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reads from stdin.
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.Sh OPTIONS
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.Bl -tag -width Ds
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.It Fl E
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Match using extended regex.
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.It Fl F
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Match using fixed strings.
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Treat each pattern specified as a string instead of a regular
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expression.
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.It Fl H
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Prefix each matching line with its filename in the output.
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This is the default when there is more than one file specified.
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.It Fl c
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Print only a count of matching lines.
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.It Fl e Ar pattern
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Specify a pattern used during the search of the input: an input
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line is selected if it matches any of the specified patterns.
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This option is most useful when multiple -e options are used to
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specify multiple patterns, or when a pattern begins with a dash.
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.It Fl f Ar file
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Read one or more patterns from the file named by the pathname file.
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Patterns in file shall be terminated by a <newline>.
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A null pattern can be specified by an empty line in pattern_file.
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Unless the -E or -F option is also specified, each pattern shall be
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treated as a BRE.
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(`-').
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.It Fl h
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Do not prefix each line with 'filename:' prefix.
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.It Fl i
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Match lines case insensitively.
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.It Fl l
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Print only the names of files with matching lines.
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.It Fl n
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Prefix each matching line with its line number in the input.
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.It Fl q
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Print nothing, only return status.
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.It Fl s
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Suppress the error messages ordinarily written for nonexistent or unreadable
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files.
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.It Fl v
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Select lines which do
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.Sy not
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match the pattern.
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.It Fl w
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The expression is searched for as a word (as if surrounded by '\\<' and '\\>').
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.It Fl x
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Consider only input lines that use all characters in the line excluding the
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terminating <newline> to match an entire fixed string or regular expression to
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be matching lines.
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.El
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.Sh EXIT STATUS
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.Bl -tag -width Ds
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.It 0
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One or more lines were matched.
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.It 1
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No lines were matched.
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.It > 1
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An error occurred.
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.El
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.Sh SEE ALSO
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.Xr sed 1 ,
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.Xr regex 7
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.Sh STANDARDS
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The
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.Nm
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utility is compliant with the
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.St -p1003.1-2013
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specification.
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.Pp
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The
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.Op Fl Hhw
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flags are an extension to that specification.
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