z/OS V1R9.0 UNIX System Services Command ... - Christian Grothoff

@ buffer
Executes each line in buffer as an ex command. If you do not specify buffer
or if you specify a buffer named @, the last buffer executed is used.
Ctrl-D Displays the number of lines of text given by the scroll variable. The
current line indicator points to the last line displayed.
Special Characters in ex Commands
When an ex command contains the percentage character (%), the character is
replaced by the name of the current file. For example, if you are about to try out a
macro and you are worried that the macro may damage the file, you could issue:
!cp % /tmp
to copy the current file to a safe holding place. As another example, a macro could
use the percentage character (%) to refer to the current file.
When an ex command contains the hash mark (#), the character is replaced by the
name of the alternate file. The name of the alternate file can be set with the read
command as described previously. Thus a command like:
e #
tells ex to edit the alternate file. Using an alternate file can be particularly
convenient when you have two files that you want to edit simultaneously. The
command just given lets you flip back and forth between the two files.
Set Option Variables
Options are set with the set command. For example:
set autowrite
sets the autowrite option. For options which are flags, i.e., are not numeric, the
variables can be turned off by putting no in front of the name in the set command,
as in:
set noautowrite
In the following list, variables that are off by default are preceded by no. The
minimal abbreviation of each option is shown after the comma. Default values are
shown after the equal sign (=).
autoflush, af
When this option is set, it holds the maximum number of seconds of data a
user would lose if a system crash occurs. vi will flush memory out to its
temporary files approximately this many seconds, unless no changes have
been made to the current edit buffer, or the user is sitting idle. It allows you
to eventually recover a more current representation of your edit buffer (after
the exrecover daemon and vi —r is run) because it intermittently updates
vi’s temporary files which are used by the exrecover daemon.
Note the following:
v The default is set to 120 seconds (2 minutes).
v To turn off this option, set autoflush to 0.
v This option has no effect on read-only files.
v This option is different than the previous preserve option because it
works with vi’s temporary files (whose location is specified by the
environment variables: TMP_VI, TMPDIR or TMP) as opposed to
recovered files found in /etc/recover/$LOGNAME.
vi
Chapter 2. Shell command descriptions 779