editors/sed_summary.htm - busybox - Git at Google

 <html>

 <head><title>Command Summary for sed (sed & awk, Second Edition)</title>
 </head>

 <body>

 <h2>Command Summary for sed</h2>

 <dl>

 <dt><b>: </b> <b> :</b><em>label</em></dt>
 <dd>Label a line in the script for the transfer of control by
 <b>b</b> or <b>t</b>.
 <em>label</em> may contain up to seven characters.
 (The POSIX standard says that an implementation can allow longer
 labels if it wishes to. GNU sed allows labels to be of any length.)
 </p></dd>


 <dt><b>=</b> [<em>address</em>]<b>=</b></dt>
 <dd>Write to standard output the line number of addressed line.</p></dd>


 <dt><b>a</b> [<em>address</em>]<b>a\</b></dt>
 <dd><em>text</em></p>

 <p>Append <em>text</em>
 following each line matched by <em>address</em>.  If
 <em>text</em> goes over more than one line, newlines
 must be "hidden" by preceding them with a backslash.  The
 <em>text</em> will be terminated by the first
 newline that is not hidden in this way.  The
 <em>text</em> is not available in the pattern space
 and subsequent commands cannot be applied to it.  The results of this
 command are sent to standard output when the list of editing commands
 is finished, regardless of what happens to the current line in the
 pattern space.</p></dd>


 <dt><b>b</b> [<em>address1</em>[,<em>address2</em>]]<b>b</b>[<em>label</em>]</dt>
 <dd>Transfer control unconditionally (branch) to
 <b>:</b><em>label</em> elsewhere in
 script.  That is, the command following the
 <em>label</em> is the next command applied to the
 current line.  If no <em>label</em> is specified,
 control falls through to the end of the script, so no more commands
 are applied to the current line.</p></dd>


 <dt><b>c</b> [<em>address1</em>[,<em>address2</em>]]<b>c\</b></dt>
 <dd><em>text</em></p>

 <p>Replace (change) the lines selected by the address with
 <em>text</em>.  When a range of lines is specified,
 all lines as a group are replaced by a single copy of
 <em>text</em>.  The newline following each line of
 <em>text</em> must be escaped by a backslash, except
 the last line.  The contents of the pattern space are, in effect,
 deleted and no subsequent editing commands can be applied to it (or to
 <em>text</em>).</p></dd>


 <dt><b>d</b> [<em>address1</em>[,<em>address2</em>]]<b>d</b></dt>
 <dd>Delete line(s) from pattern space.  Thus, the line is not passed to standard
 output. A new line of input is read and editing resumes with first
 command in script.</p></dd>


 <dt><b>D</b> [<em>address1</em>[,<em>address2</em>]]<b>D</b></dt>
 <dd>Delete first part (up to embedded newline) of multiline pattern space created
 by <b>N</b> command and resume editing with first command in
 script.  If this command empties the pattern space, then a new line
 of input is read, as if the <b>d</b> command had been executed.</p></dd>


 <dt><b>g</b> [<em>address1</em>[,<em>address2</em>]]<b>g</b></dt>
 <dd>Copy (get) contents of hold space (see <b>h</b> or
 <b>H</b> command) into the pattern space, wiping out
 previous contents.</p></dd>


 <dt><b>G</b> [<em>address1</em>[,<em>address2</em>]]<b>G</b></dt>
 <dd>Append newline followed by contents of hold space (see
 <b>h</b> or <b>H</b> command) to contents of
 the pattern space.  If hold space is empty, a newline is still
 appended to the pattern space.</p></dd>


 <dt><b>h</b> [<em>address1</em>[,<em>address2</em>]]<b>h</b></dt>
 <dd>Copy pattern space into hold space, a special temporary buffer.
 Previous contents of hold space are wiped out.</p></dd>


 <dt><b>H</b> [<em>address1</em>[,<em>address2</em>]]<b>H</b></dt>
 <dd>Append newline and contents of pattern space to contents of the hold
 space.  Even if hold space is empty, this command still appends the
 newline first.</p></dd>


 <dt><b>i</b> [<em>address1</em>]<b>i\</b></dt>
 <dd><em>text</em></p>

 <p>Insert <em>text</em> before each line matched by
 <em>address</em>. (See <b>a</b> for
 details on <em>text</em>.)</p></dd>


 <dt><b>l</b> [<em>address1</em>[,<em>address2</em>]]<b>l</b></dt>
 <dd>List the contents of the pattern space, showing nonprinting characters
 as ASCII codes.  Long lines are wrapped.</p></dd>


 <dt><b>n</b> [<em>address1</em>[,<em>address2</em>]]<b>n</b></dt>
 <dd>Read next line of input into pattern space.  Current line is sent to
 standard output.  New line becomes current line and increments line
 counter.  Control passes to command following <b>n</b>
 instead of resuming at the top of the script.</p></dd>


 <dt><b>N</b> [<em>address1</em>[,<em>address2</em>]]<b>N</b></dt>
 <dd>Append next input line to contents of pattern space; the new line is
 separated from the previous contents of the pattern space by a newline.
 (This command is designed to allow pattern matches across two
 lines.  Using \n to match the embedded newline, you can match
 patterns across multiple lines.)</p></dd>


 <dt><b>p</b> [<em>address1</em>[,<em>address2</em>]]<b>p</b></dt>
 <dd>Print the addressed line(s).  Note that this can result in duplicate
 output unless default output is suppressed by using "#n" or
 the <span class="option">-n</span>

 command-line option.  Typically used before commands that change flow
 control (<b>d</b>, <b>n</b>,
 <b>b</b>) and might prevent the current line from being
 output.</p></dd>


 <dt><b>P</b> [<em>address1</em>[,<em>address2</em>]]<b>P</b></dt>
 <dd>Print first part (up to embedded newline) of multiline pattern space
 created by <b>N</b> command.  Same as <b>p</b>
 if <b>N</b> has not been applied to a line.</p></dd>


 <dt><b>q</b> [<em>address</em>]<b>q</b></dt>
 <dd>Quit when <em>address</em> is encountered.  The
 addressed line is first written to output (if default output is not
 suppressed), along with any text appended to it by previous
 <b>a</b> or <b>r</b> commands.</p></dd>


 <dt><b>r</b> [<em>address</em>]<b>r</b> <em>file</em></dt>
 <dd>Read contents of <em>file</em> and append after the
 contents of the pattern space.  Exactly one space must be put between
 <b>r</b> and the filename.</p></dd>


 <dt><b>s</b> [<em>address1</em>[,<em>address2</em>]]<b>s</b>/<em>pattern</em>/<em>replacement</em>/[<em>flags</em>]</dt>
 <dd>Substitute <em>replacement</em> for
 <em>pattern</em> on each addressed line.  If pattern
 addresses are used, the pattern <b>//</b> represents the
 last pattern address specified.  The following flags can be specified:</p>

 	<dl>

 	<dt><b>n</b></dt>
 	<dd>Replace <em>n</em>th instance of
 	/<em>pattern</em>/ on each addressed line.
 	<em>n</em> is any number in the range 1 to 512, and
 	the default is 1.</p></dd>

 	<dt><b>g</b></dt>
 	<dd>Replace all instances of /<em>pattern</em>/ on each
 	addressed line, not just the first instance.</p></dd>

 	<dt><b>I</b></dt>
 	<dd>Matching is case-insensitive.<p></p></dd>

 	<dt><b>p</b></dt>
 	<dd>Print the line if a successful substitution is done.  If several
 	successful substitutions are done, multiple copies of the line will be
 	printed.</p></dd>

 	<dt><b>w</b> <em>file</em></dt>
 	<dd>Write the line to <em>file</em> if a replacement
 	was done.  A maximum of 10 different <em>files</em> can be opened.</p></dd>

 	</dl>

 </dd>


 <dt><b>t</b> [<em>address1</em>[,<em>address2</em>]]<b>t </b>[<em>label</em>]</dt>
 <dd>Test if successful substitutions have been made on addressed lines,
 and if so, branch to line marked by :<em>label</em>.
 (See <b>b</b> and <b>:</b>.)  If label is not
 specified, control falls through to bottom of script.</p></dd>


 <dt><b>w</b> [<em>address1</em>[,<em>address2</em>]]<b>w</b> <em>file</em></dt>
 <dd>Append contents of pattern space to <em>file</em>.
 This action occurs when the command is encountered rather than when
 the pattern space is output.  Exactly one space must separate the
 <b>w</b> and the filename.  A maximum of 10 different
 files can be opened in a script.  This command will create the file if
 it does not exist; if the file exists, its contents will be
 overwritten each time the script is executed.  Multiple write commands
 that direct output to the same file append to the end of the file.</p></dd>


 <dt><b>x</b> [<em>address1</em>[,<em>address2</em>]]<b>x</b></dt>
 <dd>Exchange contents of the pattern space with the contents of the hold
 space.</p></dd>


 <dt><b>y</b> [<em>address1</em>[,<em>address2</em>]]<b>y</b>/<em>abc</em>/<em>xyz</em>/</dt>
 <dd>Transform each character by position in string
 <em>abc</em> to its equivalent in string
 <em>xyz</em>.</p></dd>


 </dl>
	<html>

	<head><title>Command Summary for sed (sed & awk, Second Edition)</title>
	</head>

	<body>

	<h2>Command Summary for sed</h2>

	<dl>

	<dt><b>: </b> <b> :</b><em>label</em></dt>
	<dd>Label a line in the script for the transfer of control by
	<b>b</b> or <b>t</b>.
	<em>label</em> may contain up to seven characters.
	(The POSIX standard says that an implementation can allow longer
	labels if it wishes to. GNU sed allows labels to be of any length.)
	</p></dd>


	<dt><b>=</b> [<em>address</em>]<b>=</b></dt>
	<dd>Write to standard output the line number of addressed line.</p></dd>


	<dt><b>a</b> [<em>address</em>]<b>a\</b></dt>
	<dd><em>text</em></p>

	<p>Append <em>text</em>
	following each line matched by <em>address</em>. If
	<em>text</em> goes over more than one line, newlines
	must be "hidden" by preceding them with a backslash. The
	<em>text</em> will be terminated by the first
	newline that is not hidden in this way. The
	<em>text</em> is not available in the pattern space
	and subsequent commands cannot be applied to it. The results of this
	command are sent to standard output when the list of editing commands
	is finished, regardless of what happens to the current line in the
	pattern space.</p></dd>


	<dt><b>b</b> [<em>address1</em>[,<em>address2</em>]]<b>b</b>[<em>label</em>]</dt>
	<dd>Transfer control unconditionally (branch) to
	<b>:</b><em>label</em> elsewhere in
	script. That is, the command following the
	<em>label</em> is the next command applied to the
	current line. If no <em>label</em> is specified,
	control falls through to the end of the script, so no more commands
	are applied to the current line.</p></dd>


	<dt><b>c</b> [<em>address1</em>[,<em>address2</em>]]<b>c\</b></dt>
	<dd><em>text</em></p>

	<p>Replace (change) the lines selected by the address with
	<em>text</em>. When a range of lines is specified,
	all lines as a group are replaced by a single copy of
	<em>text</em>. The newline following each line of
	<em>text</em> must be escaped by a backslash, except
	the last line. The contents of the pattern space are, in effect,
	deleted and no subsequent editing commands can be applied to it (or to
	<em>text</em>).</p></dd>


	<dt><b>d</b> [<em>address1</em>[,<em>address2</em>]]<b>d</b></dt>
	<dd>Delete line(s) from pattern space. Thus, the line is not passed to standard
	output. A new line of input is read and editing resumes with first
	command in script.</p></dd>


	<dt><b>D</b> [<em>address1</em>[,<em>address2</em>]]<b>D</b></dt>
	<dd>Delete first part (up to embedded newline) of multiline pattern space created
	by <b>N</b> command and resume editing with first command in
	script. If this command empties the pattern space, then a new line
	of input is read, as if the <b>d</b> command had been executed.</p></dd>


	<dt><b>g</b> [<em>address1</em>[,<em>address2</em>]]<b>g</b></dt>
	<dd>Copy (get) contents of hold space (see <b>h</b> or
	<b>H</b> command) into the pattern space, wiping out
	previous contents.</p></dd>


	<dt><b>G</b> [<em>address1</em>[,<em>address2</em>]]<b>G</b></dt>
	<dd>Append newline followed by contents of hold space (see
	<b>h</b> or <b>H</b> command) to contents of
	the pattern space. If hold space is empty, a newline is still
	appended to the pattern space.</p></dd>


	<dt><b>h</b> [<em>address1</em>[,<em>address2</em>]]<b>h</b></dt>
	<dd>Copy pattern space into hold space, a special temporary buffer.
	Previous contents of hold space are wiped out.</p></dd>


	<dt><b>H</b> [<em>address1</em>[,<em>address2</em>]]<b>H</b></dt>
	<dd>Append newline and contents of pattern space to contents of the hold
	space. Even if hold space is empty, this command still appends the
	newline first.</p></dd>


	<dt><b>i</b> [<em>address1</em>]<b>i\</b></dt>
	<dd><em>text</em></p>

	<p>Insert <em>text</em> before each line matched by
	<em>address</em>. (See <b>a</b> for
	details on <em>text</em>.)</p></dd>


	<dt><b>l</b> [<em>address1</em>[,<em>address2</em>]]<b>l</b></dt>
	<dd>List the contents of the pattern space, showing nonprinting characters
	as ASCII codes. Long lines are wrapped.</p></dd>


	<dt><b>n</b> [<em>address1</em>[,<em>address2</em>]]<b>n</b></dt>
	<dd>Read next line of input into pattern space. Current line is sent to
	standard output. New line becomes current line and increments line
	counter. Control passes to command following <b>n</b>
	instead of resuming at the top of the script.</p></dd>


	<dt><b>N</b> [<em>address1</em>[,<em>address2</em>]]<b>N</b></dt>
	<dd>Append next input line to contents of pattern space; the new line is
	separated from the previous contents of the pattern space by a newline.
	(This command is designed to allow pattern matches across two
	lines. Using \n to match the embedded newline, you can match
	patterns across multiple lines.)</p></dd>


	<dt><b>p</b> [<em>address1</em>[,<em>address2</em>]]<b>p</b></dt>
	<dd>Print the addressed line(s). Note that this can result in duplicate
	output unless default output is suppressed by using "#n" or
	the <span class="option">-n</span>

	command-line option. Typically used before commands that change flow
	control (<b>d</b>, <b>n</b>,
	<b>b</b>) and might prevent the current line from being
	output.</p></dd>


	<dt><b>P</b> [<em>address1</em>[,<em>address2</em>]]<b>P</b></dt>
	<dd>Print first part (up to embedded newline) of multiline pattern space
	created by <b>N</b> command. Same as <b>p</b>
	if <b>N</b> has not been applied to a line.</p></dd>


	<dt><b>q</b> [<em>address</em>]<b>q</b></dt>
	<dd>Quit when <em>address</em> is encountered. The
	addressed line is first written to output (if default output is not
	suppressed), along with any text appended to it by previous
	<b>a</b> or <b>r</b> commands.</p></dd>


	<dt><b>r</b> [<em>address</em>]<b>r</b> <em>file</em></dt>
	<dd>Read contents of <em>file</em> and append after the
	contents of the pattern space. Exactly one space must be put between
	<b>r</b> and the filename.</p></dd>


	<dt><b>s</b> [<em>address1</em>[,<em>address2</em>]]<b>s</b>/<em>pattern</em>/<em>replacement</em>/[<em>flags</em>]</dt>
	<dd>Substitute <em>replacement</em> for
	<em>pattern</em> on each addressed line. If pattern
	addresses are used, the pattern <b>//</b> represents the
	last pattern address specified. The following flags can be specified:</p>

	<dl>

	<dt><b>n</b></dt>
	<dd>Replace <em>n</em>th instance of
	/<em>pattern</em>/ on each addressed line.
	<em>n</em> is any number in the range 1 to 512, and
	the default is 1.</p></dd>

	<dt><b>g</b></dt>
	<dd>Replace all instances of /<em>pattern</em>/ on each
	addressed line, not just the first instance.</p></dd>

	<dt><b>I</b></dt>
	<dd>Matching is case-insensitive.<p></p></dd>

	<dt><b>p</b></dt>
	<dd>Print the line if a successful substitution is done. If several
	successful substitutions are done, multiple copies of the line will be
	printed.</p></dd>

	<dt><b>w</b> <em>file</em></dt>
	<dd>Write the line to <em>file</em> if a replacement
	was done. A maximum of 10 different <em>files</em> can be opened.</p></dd>

	</dl>

	</dd>


	<dt><b>t</b> [<em>address1</em>[,<em>address2</em>]]<b>t </b>[<em>label</em>]</dt>
	<dd>Test if successful substitutions have been made on addressed lines,
	and if so, branch to line marked by :<em>label</em>.
	(See <b>b</b> and <b>:</b>.) If label is not
	specified, control falls through to bottom of script.</p></dd>


	<dt><b>w</b> [<em>address1</em>[,<em>address2</em>]]<b>w</b> <em>file</em></dt>
	<dd>Append contents of pattern space to <em>file</em>.
	This action occurs when the command is encountered rather than when
	the pattern space is output. Exactly one space must separate the
	<b>w</b> and the filename. A maximum of 10 different
	files can be opened in a script. This command will create the file if
	it does not exist; if the file exists, its contents will be
	overwritten each time the script is executed. Multiple write commands
	that direct output to the same file append to the end of the file.</p></dd>


	<dt><b>x</b> [<em>address1</em>[,<em>address2</em>]]<b>x</b></dt>
	<dd>Exchange contents of the pattern space with the contents of the hold
	space.</p></dd>


	<dt><b>y</b> [<em>address1</em>[,<em>address2</em>]]<b>y</b>/<em>abc</em>/<em>xyz</em>/</dt>
	<dd>Transform each character by position in string
	<em>abc</em> to its equivalent in string
	<em>xyz</em>.</p></dd>


	</dl>