ex.1 (2010 09)

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If the buffer name is speciﬁed in uppercase, and the buffer is to be modiﬁed, the buffer

shall be appended to rather than being overwritten. If the buffer is not to be modiﬁed, the

buffer name can be speciﬁed in lowercase or uppercase with the same results. There shall

be also one unnamed buffer, which is the repository for all text deleteed or yanked when

no buffer is speciﬁed.

There are also numbered buffers, 1 through 9, which shall be accessible only from visual

mode. These buffers are special in that, in the visual mode, when deleted text is placed in

the unnamed buffer, it also shall be placed in buffer 1, the previous contents buffer 1

shall be placed in buffer 2 and so on. Any text in the buffer 9 shall be lost. Text that is

yanked into the unnamed buffer shall not modify the numbered buffers. Text cannot be

placed directly into the numbered buffered, although it can be retrieved from them by

using a visual mode "put" command with the buffer name given as s number. When the

buffer modiﬁer is not used in the commands below, the unnamed buffer shall be the

default.

word (UNIX Standard only, see standards (5)) In the POSIX Locale, a

word consists of a maxi-

mal sequence of letters, digits and underscores, delimited at both ends by characters

other than letters, digits, or underscores, or by the beginning or end of a word or the ﬁle.

! A character that can be appended to the command to modify its operation, as detailed

in the individual command descriptions.

If both a

count and range is speciﬁed for a command that uses them, the number of

lines affected shall be taken from the count value rather than the range. The starting

line for the command shall be taken to be the ﬁrst line addressed by the range.

When only a

line or range is speciﬁed with no command, the implied command shall

be either print, list,ornumber ( p, l,or#). The command selected shall be the last

of these three commands to be used. When no range or count is speciﬁed and the com-

mand line is a blank line, the current line shall be written, and the current line shall be

set to .+1.

Zero or mode <blank> characters can precede or follow the addresses, count or command

name. Any object following a command name (such as buffer, ﬁle etc) that begins with an

alphabetic character shall be separated from the command name with at least one

<blank>.

For each of the commands listed below, the command can be entered as the abbreviation (those charac-

ters in the Synopsis command word preceding the [), the full command (all characters shown for the com-

mand word, omitting the [ and ]), or any subset of the characters of the full command down to the abbre-

viation.

abbreviate ab[breviate] word replacement

Add the named abbreviation to the current list. In visual mode, if word is typed as a

complete word during input, it is replaced by the string replacement .

append line a[ppend][!]

Enter input mode; the input text is placed after the speciﬁed line. If line 0 is

speciﬁed, the text is placed at the beginning of the work area. The last input line

becomes the current line, or the target line if no lines are input.

Appending

! to the command toggles the autoindent editor option setting for this

insert only.

args ar[gs]

Prints the argument, placing the current argument between

[ and ].

change range c[hange][!] count

Enter input mode; the input text replaces the speciﬁed lines. The last input line

becomes the current line; if no lines are input, the effect is the same as a delete.

Appending

! to the command toggles the autoindent editor option setting for this

insert only.

chdir chd[ir][!][directory ]

cd[!][ directory ]

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