117 lines
5.7 KiB
HTML
117 lines
5.7 KiB
HTML
<head>
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<title>grep(1) - Plan 9 from User Space</title>
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<meta content="text/html; charset=utf-8" http-equiv=Content-Type>
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<body bgcolor=#ffffff>
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<table border=0 cellpadding=0 cellspacing=0 width=100%>
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<tr height=10><td>
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<tr><td width=20><td>
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<tr><td width=20><td><b>GREP(1)</b><td align=right><b>GREP(1)</b>
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<tr><td width=20><td colspan=2>
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<br>
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<p><font size=+1><b>NAME </b></font><br>
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<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
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grep, g – search a file for a pattern<br>
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</table>
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<p><font size=+1><b>SYNOPSIS </b></font><br>
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<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
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<tt><font size=+1>grep</font></tt> [ <i>option ...</i> ] <i>pattern</i> [ <i>file ...</i> ]
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<table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table>
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<tt><font size=+1>g</font></tt> [ <i>option ...</i> ] <i>pattern</i> [ <i>file ...</i> ]<br>
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</table>
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<p><font size=+1><b>DESCRIPTION </b></font><br>
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<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
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<i>Grep</i> searches the input <i>files</i> (standard input default) for lines
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that match the <i>pattern</i>, a regular expression as defined in <a href="../man7/regexp.html"><i>regexp</i>(7)</a>
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with the addition of a newline character as an alternative (substitute
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for <tt><font size=+1>|</font></tt>) with lowest precedence. Normally, each line matching the
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pattern is ‘selected’, and each selected line is copied to
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the standard output. The options are<br>
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<tt><font size=+1>−c</font></tt> Print only a count of matching lines.<br>
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<tt><font size=+1>−h</font></tt> Do not print file name tags (headers) with output lines.<br>
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<tt><font size=+1>−e</font></tt> The following argument is taken as a <i>pattern</i>. This option makes
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it easy to specify patterns that might confuse argument parsing,
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such as <tt><font size=+1>−n</font></tt>.<br>
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<tt><font size=+1>−i</font></tt> Ignore alphabetic case distinctions. The implementation folds
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into lower case all letters in the pattern and input before interpretation.
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Matched lines are printed in their original form.<br>
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<tt><font size=+1>−l</font></tt> (ell) Print the names of files with selected lines; don’t print
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the lines.<br>
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<tt><font size=+1>−L</font></tt> Print the names of files with no selected lines; the converse
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of <tt><font size=+1>−l</font></tt>.<br>
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<tt><font size=+1>−n</font></tt> Mark each printed line with its line number counted in its file.<br>
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<tt><font size=+1>−s</font></tt> Produce no output, but return status.<br>
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<tt><font size=+1>−v</font></tt> Reverse: print lines that do not match the pattern.<br>
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<tt><font size=+1>−f</font></tt> The pattern argument is the name of a file containing regular
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expressions one per line.<br>
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<tt><font size=+1>−b</font></tt> Don’t buffer the output: write each output line as soon as it
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is discovered.
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<table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table>
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Output lines are tagged by file name when there is more than one
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input file. (To force this tagging, include <tt><font size=+1>/dev/null</font></tt> as a file
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name argument.)
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<table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table>
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Care should be taken when using the shell metacharacters <tt><font size=+1>$*[^|()=\</font></tt>
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and newline in <i>pattern</i>; it is safest to enclose the entire expression
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in single quotes <tt><font size=+1>'</font></tt>...<tt><font size=+1>'</font></tt>. An expression starting with ’*’ will treat
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the rest of the expression as literal characters.
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<table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table>
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<i>G</i> invokes grep with <tt><font size=+1>−n</font></tt> and forces tagging of output lines by file
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name. If no files are listed, it searches all files matching<br>
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<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
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<tt><font size=+1>*.C *.b *.c *.h *.m *.cc *.java *.py *.tex *.ms<br>
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</font></tt>
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</table>
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</table>
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<p><font size=+1><b>SOURCE </b></font><br>
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<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
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<tt><font size=+1>/usr/local/plan9/src/cmd/grep<br>
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/usr/local/plan9/bin/g<br>
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</font></tt>
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</table>
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<p><font size=+1><b>SEE ALSO </b></font><br>
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<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
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<a href="../man1/ed.html"><i>ed</i>(1)</a>, <a href="../man1/awk.html"><i>awk</i>(1)</a>, <a href="../man1/sed.html"><i>sed</i>(1)</a>, <a href="../man1/sam.html"><i>sam</i>(1)</a>, <a href="../man7/regexp.html"><i>regexp</i>(7)</a><br>
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</table>
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<p><font size=+1><b>DIAGNOSTICS </b></font><br>
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<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
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Exit status is null if any lines are selected, or non-null when
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no lines are selected or an error occurs.<br>
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</table>
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<td width=20>
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<tr height=20><td>
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</table>
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<!-- TRAILER -->
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<table border=0 cellpadding=0 cellspacing=0 width=100%>
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<tr height=15><td width=10><td><td width=10>
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<tr><td><td>
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<center>
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<a href="../../"><img src="../../dist/spaceglenda100.png" alt="Space Glenda" border=1></a>
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</center>
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</table>
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<!-- TRAILER -->
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</body></html>
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