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| 1 | .TH GREP 1
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| 2 | .SH NAME
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| 3 | grep \- search a file for lines containing a given pattern
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| 4 | .SH SYNOPSIS
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| 5 | \fBgrep\fR [\fB\-elnsv\fR] \fIpattern\fR [\fIfile\fR] ...\fR
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| 6 | .br
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| 7 | .de FL
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| 8 | .TP
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| 9 | \\fB\\$1\\fR
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| 10 | \\$2
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| 11 | ..
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| 12 | .de EX
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| 13 | .TP 20
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| 14 | \\fB\\$1\\fR
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| 15 | # \\$2
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| 16 | ..
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| 17 | .SH OPTIONS
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| 18 | .FL "\-e" "\fB\-e \fIpattern\fR is the same as \fIpattern\fP
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| 19 | .FL "\-c" "Print a count of lines matched"
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| 20 | .FL "\-i" "Ignore case"
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| 21 | .FL "\-l" "Print file names, no lines"
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| 22 | .FL "\-n" "Print line numbers"
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| 23 | .FL "\-s" "Status only, no printed output"
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| 24 | .FL "\-v" "Select lines that do not match"
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| 25 | .SH EXAMPLES
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| 26 | .EX "grep mouse file " "Find lines in \fIfile\fP containing \fImouse\fP"
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| 27 | .EX "grep [0\-9] file" "Print lines containing a digit"
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| 28 | .SH DESCRIPTION
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| 29 | .PP
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| 30 | .I Grep
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| 31 | searches one or more files (by default, \fIstdin\fR) and selects out
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| 32 | all the lines that match the pattern.
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| 33 | All the regular expressions accepted by
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| 34 | .I ed
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| 35 | and
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| 36 | .I mined
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| 37 | are allowed.
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| 38 | In addition, + can be used instead of \(** to mean 1 or more occurrences,
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| 39 | ? can be used to mean 0 or 1 occurrences, and
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| 40 | | can be used between two regular expressions to mean either
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| 41 | one of them.
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| 42 | Parentheses can be used for grouping.
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| 43 | If a match is found, exit status 0 is returned.
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| 44 | If no match is found, exit status 1 is returned.
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| 45 | If an error is detected, exit status 2 is returned.
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| 46 | .SH "SEE ALSO"
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| 47 | .BR cgrep (1),
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| 48 | .BR fgrep (1),
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| 49 | .BR sed (1),
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| 50 | .BR awk (9).
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