grep.1

Unix操作系统minix 2.0源码

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