51 lines
1.3 KiB
Groff
51 lines
1.3 KiB
Groff
.TH GREP 1
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.SH NAME
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grep \- search a file for lines containing a given pattern
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.SH SYNOPSIS
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\fBgrep\fR [\fB\-elnsv\fR] \fIpattern\fR [\fIfile\fR] ...\fR
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.br
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.de FL
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.TP
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\\fB\\$1\\fR
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\\$2
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..
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.de EX
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.TP 20
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\\fB\\$1\\fR
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# \\$2
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..
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.SH OPTIONS
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.FL "\-e" "\fB\-e \fIpattern\fR is the same as \fIpattern\fP
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.FL "\-c" "Print a count of lines matched"
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.FL "\-i" "Ignore case"
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.FL "\-l" "Print file names, no lines"
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.FL "\-n" "Print line numbers"
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.FL "\-s" "Status only, no printed output"
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.FL "\-v" "Select lines that do not match"
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.SH EXAMPLES
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.EX "grep mouse file " "Find lines in \fIfile\fP containing \fImouse\fP"
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.EX "grep [0\-9] file" "Print lines containing a digit"
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.SH DESCRIPTION
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.PP
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.I Grep
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searches one or more files (by default, \fIstdin\fR) and selects out
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all the lines that match the pattern.
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All the regular expressions accepted by
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.I ed
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and
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.I mined
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are allowed.
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In addition, + can be used instead of \(** to mean 1 or more occurrences,
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? can be used to mean 0 or 1 occurrences, and
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| can be used between two regular expressions to mean either
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one of them.
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Parentheses can be used for grouping.
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If a match is found, exit status 0 is returned.
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If no match is found, exit status 1 is returned.
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If an error is detected, exit status 2 is returned.
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.SH "SEE ALSO"
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.BR cgrep (1),
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.BR fgrep (1),
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.BR sed (1),
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.BR awk (9).
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