sh.html

unix 下的C开发手册,还用详细的例程。

<p>
The following commands are recognised in command mode:
<dl compact>

<dt>newline<dd>
Execute the current command line being edited.

<dt>&lt;control&gt;-L<dd>
Redraw the current command line.
Position the cursor at the same location on the new command line.

<dt><b>#</b><dd>Insert the character # at the beginning of the
current command line and
treat the current command line as a comment.
This line will be entered into the command history; see
<i><a href="fc.html">fc</a></i>.

<dt><b>=</b><dd>Display the possible shell word expansions (see
<xref href=wordexp><a href="chap2.html#tag_001_006">
Word Expansions
</a></xref>)
of the bigword at the current command line position.
These expansions will be displayed on subsequent terminal lines.
If the bigword contains none of the characters "?", "*" or "[",
an asterisk
(*)
will be implicitly assumed at the end.
If any directories are matched, these expansions
will have a "/" character appended.
After the expansion, the
line will be redrawn, the cursor will be repositioned
at the current cursor position,
and
<i>sh</i>
will be placed in
command mode.

<dt><b>\</b><dd>Perform pathname expansion (see
<xref href=pathexp><a href="chap2.html#tag_001_006_006">
Pathname Expansion
</a></xref>)
on the current bigword, up
to the largest set of characters that can be matched uniquely.
If the bigword contains none
of the characters "?", "*" or "[",
an asterisk
(*)
will be implicitly assumed at the end.
This maximal expansion then
will replace the original bigword in the command line, and the cursor
will be placed after this expansion.
If the resulting bigword completely and uniquely
matches a directory,
a "/" character will be inserted directly after the bigword.
If some other file is completely matched, a single space
character will be inserted after the bigword.
After this operation,
<i>sh</i>
will be placed in insert mode.

<dt><b>*</b><dd>Perform pathname expansion on the current bigword and insert all
expansions into the command to replace the current
bigword, with each expansion separated by a single
space
character.
If at the end of the line, the current cursor position will be moved to
the first column position following the expansions and
<i>sh</i>
will be placed in insert mode.
Otherwise, the current cursor position will be
the last column position of the first character after the expansions and
<i>sh</i>
will be placed in insert mode.
If the current bigword contains none of the characters "?", "*" or "[",
before the operation, an asterisk will be implicitly assumed at the end.

<dt><b>@</b><i>letter</i><dd>
Insert the value of the alias named
_<i>letter</i>
The symbol
<i>letter</i>
represents a single alphabetic character from the
portable character set; implementations may support
additional characters as an extension.
If the alias
_<i>letter</i>
contains other editing commands,
these commands will be
performed as part of the insertion.
If no alias
_<i>letter</i>
is enabled, this command will have no effect.

<dt><b>[</b><i>count</i><b>]~</b><dd>
Convert, if the current character is a lower-case letter,
to the equivalent upper-case letter and
<i>vice</i>versa<i>,</i>
as prescribed by the current locale.
The current cursor position then will be advanced by one character.
If the cursor was positioned on the last character of the line,
the case conversion will occur, but the cursor will not advance.
If the
~
command is preceded by a
<i>count</i>,
that number of characters will be converted,
and the cursor will be advanced to
the character position after the last character
converted.
If the
<i>count</i>
is larger than the number of characters after the cursor,
this is not considered an error;
the cursor will advance to the last character on the line.

<dt><b>[</b><i>count</i><b>].</b><dd>
Repeat the most recent non-motion command, even if it was executed on
an earlier command line.
If the previous command was
preceded by a
<i>count</i>,
and no count is given on the "." command,
the count from the previous command
will be included as part of the repeated command.
If the "." command is preceded by a
<i>count</i>,
this will override any
<i>count</i>
argument to the previous command.
The
<i>count</i>
specified in the "." command will become the count for
subsequent "." commands issued without a count.

<dt><b>[</b><i>number</i><b>]v</b><dd>
Invoke the
<i><a href="vi.html">vi</a></i>
editor to edit the current command line in a temporary file.
When the editor exits, the
commands in the temporary file will be executed.
If a
<i>number</i>
is prefixed to the command, it specifies the command
number in the
command history to be edited, rather than the
current command line.

<dt><b>[</b><i>count</i><b>]l</b><dd>
<dt><b>[</b><i>count</i><b>]</b>&lt;space&gt;<dd>
Move the current cursor position to the next character position.
If the cursor was positioned on the last character of the line,
the terminal will be alerted
and the cursor will not be advanced.
If the
<i>count</i>
is larger than the number of characters after the cursor,
this is not considered an error;
the cursor will advance to the last character on the line.

<dt><b>[</b><i>count</i><b>]h</b><dd>
Move the current cursor position to the
<i>count</i>th
(default 1) previous character position.
If the cursor was positioned on the first character
of the line,
the terminal will be alerted
and the cursor will not be moved.
If the count is
larger than the number of characters before the cursor, this
is not considered an error; the cursor will move to the
first character on the line.

<dt><b>[</b><i>count</i><b>]w</b><dd>
Move to the start of the next word.
If the cursor was positioned on the last character of the line,
the terminal will be alerted
and the cursor will not be advanced.
If the
<i>count</i>
is larger than the number of words after the cursor,
this is not considered an error;
the cursor will advance to the last character on the line.

<dt><b>[</b><i>count</i><b>]W</b><dd>
Move to the start of the next bigword.
If the cursor was positioned on the last character of the line,
the terminal will be alerted
and the cursor will not be advanced.
If the
<i>count</i>
is larger than the number of bigwords after the cursor,
this is not considered an error;
the cursor will advance to the last character on the line.

<dt><b>[</b><i>count</i><b>]e</b><dd>
Move to the end of the current word.
If at the end of a word, move to the end of the next word.
If the cursor was positioned on the last character of the line,
the terminal will be alerted
and the cursor will not be advanced.
If the
<i>count</i>
is larger than the number of words after the cursor,
this is not considered an error;
the cursor will advance to the last character on the line.

<dt><b>[</b><i>count</i><b>]E</b><dd>
Move to the end of the current bigword.
If at the end of a bigword, move to the end of the next bigword.
If the cursor was positioned on the last character of the line,
the terminal will be alerted
and the cursor will not be advanced.
If the
<i>count</i>
is larger than the number of bigwords after the cursor,
this is not considered an error;
the cursor will advance to the last character on the line.

<dt><b>[</b><i>count</i><b>]b</b><dd>
Move to the beginning of the current word.
If at the beginning of a word, move to the beginning of the previous word.
If the cursor was positioned on the first character of the line,
the terminal will be alerted
and the cursor will not be moved.
If the
<i>count</i>
is larger than the number of words
preceding the cursor,
this is not considered an error;
the cursor will return to the first character on the line.

<dt><b>[</b><i>count</i><b>]B</b><dd>
Move to the beginning of the current bigword.
If at the beginning
of a bigword, move to the beginning of the previous bigword.
If the cursor was positioned on the first character of the line,
the terminal will be alerted
and the cursor will not be moved.
If the
<i>count</i>
is larger than the number of bigwords preceding the cursor,
this is not considered an error;
the cursor will return to the first character on the line.

<dt><b>^</b><dd>Move the current cursor position to the first character on the
input line that is not a
blank character.

<dt><b>$</b><dd>Move to the last character position on the current command line.

<dt><b>0</b><dd>(Zero.)
Move to the first character position on the current command line.

<dt><b>[</b><i>count</i><b>]\||</b><dd>
Move to the
<i>count</i>th
character position on the current command line.
If no number is specified, move to the first position.
The first character position is numbered 1.
If the count is larger than the number of characters on
the line, this is not considered an error; the
cursor will be placed on the last character on the line.

<dt><b>[</b><i>count</i><b>]f</b><i>c</i><dd>
Move to the first occurrence of the character
<i>c</i>
that occurs after the current cursor position.
If the cursor was positioned on the last character of the line,
the terminal will be alerted
and the cursor will not be advanced.
If the character
<i>c</i>
does not occur in the line after the
current cursor position,
the terminal will be alerted
and the cursor will not be moved.

<dt><b>[</b><i>count</i><b>]F</b><i>c</i><dd>
Move to the first occurrence of the character
<i>c</i>
that occurs before the current cursor position.
If the cursor was positioned on the first character of the line,
the terminal will be alerted
and the cursor will not be moved.
If the character
<i>c</i>
does not occur in the line before the
current cursor position,
the terminal will be alerted
and the cursor will not be moved.

<dt><b>[</b><i>count</i><b>]t</b><i>c</i><dd>
Move to the character before the first
occurrence of the character
<i>c</i>
that occurs after the
current cursor position.
If the cursor was positioned
on the last character of the line,
the terminal will be alerted
and the cursor will not be advanced.
If the character
<i>c</i>
does not occur in the line after the current cursor position,
the terminal will be alerted
and the cursor will not be moved.

<dt><b>[</b><i>count</i><b>]T</b><i>c</i><dd>
Move to the character after the first
occurrence of the character
<i>c</i>
that occurs before the
current cursor position.
If the cursor was positioned
on the first character of the line,
the terminal will be alerted
and the cursor will not be moved.
If the character
<i>c</i>
does not occur in the line before the current cursor position,
the terminal will be alerted
and the cursor will not be moved.

<dt><b>[</b><i>count</i><b>];</b><dd>
Repeat the most recent
<b>f</b>,
<b>F</b>,
<b>t</b>
or
<b>T</b>
command.
Any number argument
on that previous command will be ignored.
Errors are those described for the repeated command.

<dt><b>[</b><i>count</i><b>],</b><dd>
Repeat the most recent
f,
F,
t
or
T
command.
Any number argument
on that previous command will be ignored.
However, reverse the direction
of that command.

<dt><b>a</b><dd>Enter insert mode after the current cursor position.
Characters that are entered will be inserted before the next character.

<dt><b>A</b><dd>Enter insert mode after the end of the current command line.

<dt><b>i</b><dd>Enter insert mode at the current cursor position.
Characters
that are entered will be inserted before the current character.

<dt><b>I</b><dd>Enter insert mode at the beginning of the current command line.

<dt><b>R</b><dd>Enter insert mode, replacing characters from the
command line beginning at the current cursor position.

<dt><b>[</b><i>count</i><b>]c</b><i>motion</i><dd>
Delete the characters between the current cursor position and the
cursor position that would result from the specified
<i>motion</i>
command.
Then enter insert mode before
the first character following any deleted characters.
If
<i>count</i>
is specified, it will be applied to the
motion command.
A
<i>count</i>
will be ignored for the following motion commands:
<pre>
<code>
0    ^    $    c
</code>
</pre>

If the
<i>motion</i>
command
is the character
<b>c</b>,
the current command line will be cleared and
insert mode will be entered.
If the
<i>motion</i>
command would move
the current cursor position toward the beginning of the command line,
the character under the