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Update grep(1) manpage and usage line

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sin 2014-11-21 13:10:29 +00:00
parent 64e7504314
commit 8d26936b83
2 changed files with 66 additions and 60 deletions
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124
grep.1
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@ -1,80 +1,86 @@
.TH GREP 1 sbase\-VERSION
.SH NAME
grep \- search files for a pattern
.SH SYNOPSIS
.B grep
.RB [ \-EFHchilnqsvx ]
.RB [ \-e
.I pattern ]
.RB [ \-f
.I file ]
.I pattern
.RI [ file ...]
.SH DESCRIPTION
.B grep
.Dd November 21, 2014
.Dt GREP 1 sbase\-VERSION
.Sh NAME
.Nm grep
.Nd search files for patterns
.Sh SYNOPSIS
.Nm grep
.Op Fl EFHchilnqsvx
.Op Fl e Ar pattern
.Op Fl f Ar file
.Op Ar pattern
.Op Ar file ...
.Sh DESCRIPTION
.Nm
searches the input files for lines that match the
.IR pattern ,
.Ar pattern ,
a regular expression as defined in
.IR regex (7).
By default each matching line is printed to stdout. If no file is given, grep
.Xr regex 7 .
By default each matching line is printed to stdout. If no file is given
.Nm
reads from stdin.
.P
The status code is 0 if any lines match, and 1 if not. If an error occurred the
status code is 2.
.SH OPTIONS
.TP
.B \-E
Matches using extended regex.
.TP
.B \-F
.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.
.TP
.B \-H
Prefixes each matching line with its filename in the output. This is the
.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.
.TP
.B \-c
Prints only a count of matching lines.
.TP
.B \-e pattern
.It Fl c
Print only a count of matching lines.
.It Fl e Ar pattern
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
specify multiple patterns, or when a pattern begins with a dash
.TP
.B \-f file
.It Fl f Ar file
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.
(`-').
.TP
.B \-h
.It Fl h
Do not prefix each line with 'filename:' prefix.
.TP
.B \-i
Matches lines case insensitively.
.TP
.B \-l
Prints only the names of files with matching lines.
.TP
.B \-n
Prefixes each matching line with its line number in the input.
.TP
.B \-q
Prints nothing, only returns status.
.TP
.B \-s
.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
Print nothing, only returns status.
.It Fl s
Suppress the error messages ordinarily written for nonexistent or unreadable files.
.TP
.B \-v
Selects lines which do
.It Fl v
Select lines which do
.B not
Match the pattern.
.TP
.B \-x
.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.
.SH SEE ALSO
.IR regex (7)
.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 regex 7 ,
.Xr sed 1
.Sh STANDARDS
The
.Nm
utility is compliant with the
.St -p1003.1-2008
specification.
.Pp
The flags
.Op Fl Hh
are an extension to that specification.

2
grep.c
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@ -39,7 +39,7 @@ static SLIST_HEAD(phead, pattern) phead;
static void
usage(void)
{
enprintf(Error, "usage: %s [-EFHcilnqsvx] [-e pattern] [-f file] pattern [files...]\n", argv0);
enprintf(Error, "usage: %s [-EFHcilnqsvx] [-e pattern] [-f file] [pattern] [file ...]\n", argv0);
}
int