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

Table 32. tcsh Built-in Shell Variables (continued)
Variable Purpose
watch A list of user/terminal pairs to watch for logins and
logouts. If either the user is any all terminals are watched
for the given user and vice versa. Setting watch to (any
any) watches all users and terminals. For example,
set watch = (george ttyd 1 any console $user any)
reports activity of the user george on ttyd1, any user on
the console, and oneself (or a trespasser) on any
terminal.
Logins and logouts are checked every 10 minutes by
default, but the first word of watch can be set to a
number to check every so many minutes. For example,
set watch = (1 any any)
reports any login/logout once every minute. For the
impatient, the log built-in command triggers a watch
report at any time. All current logins are reported (as with
the log built-in) when watch is first set.
The who shell variable controls the format of watch
reports.
who The format string for watch messages. The following
sequences are replaced by the given information:
%n The name of the user who logged in/out.
%a The observed action, i.e., ’logged on’. ’logged
off’, or ’replaced olduser on’.
%l The terminal (tty) on which the user logged
in/out.
%M The full hostname of the remote host, or ’local’ if
the login/logout was from the local host.
%m The hostname of the remote host up to the first
’.’ (period). The full name is printed if it is an IP
address or an X Window System display.
%M and %m are available only on systems which store
the remote hostname in /etc/utmp. If unset, %n has %a
%l from %m. is used, or %n has %a %l. on systems
which don’t store the remote hostname.
wordchars A list of non-alphanumeric characters to be considered
part of a word by the forward-word, back-ward word, etc.
editor commands. If unset, *?_-.[] ~= is used.
tcsh shell variables not described in the Table 32 on page 656 table are described
below:
prompt
The string which is printed before reading each command from the terminal.
prompt may include any of the following formatting sequences, which are
replaced by the given information:
%/ The current working directory.
%~ The current working directory, but with one’s home directory
tcsh
Chapter 2. Shell command descriptions 665