sbase/grep.1

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