mirror of
https://github.com/sheumann/hush.git
synced 2024-12-23 05:29:58 +00:00
221 lines
8.0 KiB
HTML
221 lines
8.0 KiB
HTML
|
<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>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>
|