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authorrsc <devnull@localhost>2005-01-14 03:45:44 +0000
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+<head>
+<title>grep(1) - Plan 9 from User Space</title>
+<meta content="text/html; charset=utf-8" http-equiv=Content-Type>
+</head>
+<body bgcolor=#ffffff>
+<table border=0 cellpadding=0 cellspacing=0 width=100%>
+<tr height=10><td>
+<tr><td width=20><td>
+<tr><td width=20><td><b>GREP(1)</b><td align=right><b>GREP(1)</b>
+<tr><td width=20><td colspan=2>
+ <br>
+<p><font size=+1><b>NAME </b></font><br>
+
+<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
+
+ grep, g &ndash; search a file for a pattern<br>
+
+</table>
+<p><font size=+1><b>SYNOPSIS </b></font><br>
+
+<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
+
+ <tt><font size=+1>grep</font></tt> [ <i>option ...</i> ] <i>pattern</i> [ <i>file ...</i> ]
+ <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table>
+
+ <tt><font size=+1>g</font></tt> [ <i>option ...</i> ] <i>pattern</i> [ <i>file ...</i> ]<br>
+
+</table>
+<p><font size=+1><b>DESCRIPTION </b></font><br>
+
+<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
+
+ <i>Grep</i> searches the input <i>files</i> (standard input default) for lines
+ that match the <i>pattern</i>, a regular expression as defined in <a href="../man7/regexp.html"><i>regexp</i>(7)</a>
+ with the addition of a newline character as an alternative (substitute
+ for <tt><font size=+1>|</font></tt>) with lowest precedence. Normally, each line matching the
+ pattern is &#8216;selected&#8217;, and each selected line is copied to
+ the standard output. The options are<br>
+ <tt><font size=+1>&#8722;c</font></tt>&nbsp;&nbsp;&nbsp;&nbsp;Print only a count of matching lines.<br>
+ <tt><font size=+1>&#8722;h</font></tt>&nbsp;&nbsp;&nbsp;&nbsp;Do not print file name tags (headers) with output lines.<br>
+ <tt><font size=+1>&#8722;e</font></tt>&nbsp;&nbsp;&nbsp;&nbsp;The following argument is taken as a <i>pattern</i>. This option makes
+ it easy to specify patterns that might confuse argument parsing,
+ such as <tt><font size=+1>&#8722;n</font></tt>.<br>
+ <tt><font size=+1>&#8722;i</font></tt>&nbsp;&nbsp;&nbsp;&nbsp;Ignore alphabetic case distinctions. The implementation folds
+ into lower case all letters in the pattern and input before interpretation.
+ Matched lines are printed in their original form.<br>
+ <tt><font size=+1>&#8722;l</font></tt>&nbsp;&nbsp;&nbsp;&nbsp;(ell) Print the names of files with selected lines; don&#8217;t print
+ the lines.<br>
+ <tt><font size=+1>&#8722;L</font></tt>&nbsp;&nbsp;&nbsp;&nbsp;Print the names of files with no selected lines; the converse
+ of <tt><font size=+1>&#8722;l</font></tt>.<br>
+ <tt><font size=+1>&#8722;n</font></tt>&nbsp;&nbsp;&nbsp;&nbsp;Mark each printed line with its line number counted in its file.<br>
+ <tt><font size=+1>&#8722;s</font></tt>&nbsp;&nbsp;&nbsp;&nbsp;Produce no output, but return status.<br>
+ <tt><font size=+1>&#8722;v</font></tt>&nbsp;&nbsp;&nbsp;&nbsp;Reverse: print lines that do not match the pattern.<br>
+ <tt><font size=+1>&#8722;f</font></tt>&nbsp;&nbsp;&nbsp;&nbsp;The pattern argument is the name of a file containing regular
+ expressions one per line.<br>
+ <tt><font size=+1>&#8722;b</font></tt>&nbsp;&nbsp;&nbsp;&nbsp;Don&#8217;t buffer the output: write each output line as soon as it
+ is discovered.
+ <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table>
+
+ Output lines are tagged by file name when there is more than one
+ input file. (To force this tagging, include <tt><font size=+1>/dev/null</font></tt> as a file
+ name argument.)
+ <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table>
+
+ Care should be taken when using the shell metacharacters <tt><font size=+1>$*[^|()=\</font></tt>
+ and newline in <i>pattern</i>; it is safest to enclose the entire expression
+ in single quotes <tt><font size=+1>'</font></tt>...<tt><font size=+1>'</font></tt>. An expression starting with &#8217;*&#8217; will treat
+ the rest of the expression as literal characters.
+ <table border=0 cellpadding=0 cellspacing=0><tr height=5><td></table>
+
+ <i>G</i> invokes grep with <tt><font size=+1>&#8722;n</font></tt> and forces tagging of output lines by file
+ name. If no files are listed, it searches all files matching<br>
+
+ <table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
+
+ <tt><font size=+1>*.C *.b *.c *.h *.m *.cc *.java *.py *.tex *.ms<br>
+ </font></tt>
+ </table>
+
+</table>
+<p><font size=+1><b>SOURCE </b></font><br>
+
+<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
+
+ <tt><font size=+1>/usr/local/plan9/src/cmd/grep<br>
+ /usr/local/plan9/bin/g<br>
+ </font></tt>
+</table>
+<p><font size=+1><b>SEE ALSO </b></font><br>
+
+<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
+
+ <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>
+
+</table>
+<p><font size=+1><b>DIAGNOSTICS </b></font><br>
+
+<table border=0 cellpadding=0 cellspacing=0><tr height=2><td><tr><td width=20><td>
+
+ Exit status is null if any lines are selected, or non-null when
+ no lines are selected or an error occurs.<br>
+
+</table>
+
+<td width=20>
+<tr height=20><td>
+</table>
+<!-- TRAILER -->
+<table border=0 cellpadding=0 cellspacing=0 width=100%>
+<tr height=15><td width=10><td><td width=10>
+<tr><td><td>
+<center>
+<a href="../../"><img src="../../dist/spaceglenda100.png" alt="Space Glenda" border=1></a>
+</center>
+</table>
+<!-- TRAILER -->
+</body></html>