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

Portability
Related Information
sleep, tcsh
POSIX.2, X/Open Portability Guide, UNIX systems.
wall — Broadcast a message to logged-in users
Format
Description
Exit Values
wall [message]
wall sends a message to all logged-in users. Type each line, pressing Enter after
each. After you finish typing the message, enter End-of-File or an interrupt (typically,
for End-of-File or for an interrupt, where EscChar is
normally the cent sign; if you use rlogin or telnet to enter the shell, you hold down
the Ctrl key while you press either D or C).
You must be a superuser to ensure permission to write to all the ttys that are
logged in. If you are not a superuser, then writes to all ttys will fail (except your
own) and those users will not receive the message. Superusers can also get
failures if the /etc/utmpx file does not correctly represent the users currently logged
in.
Recipients of the message receive a beep announcing the message. The message
is displayed in this form:
Broadcast Message from SWEHR@AQFT (ttyp0006) at 10:43:54 (EDT5EST)...
This is the text of the message line1.
This is line2.
0 wall successfully sent the message to all users.
1 Failure due to any of the following:
v No message was entered in response to the prompt.
v You do not have permission to write to a user’s terminal.
wc — Count newlines, words, and bytes
Format
Description
Options
wc [–c|–m] [–lw ] [file ...]
wc tells you how big a text document is. It counts the number of s,
words, characters, and bytes in text files. If you specify multiple files, wc produces
counts for each file, plus totals for all files.
–c Prints a byte count. You cannot specify this option with –m.
–l Prints a count
wait
Chapter 2. Shell command descriptions 789