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WALL(1)             UNIX Programmer's Manual		  WALL(1)



[1mNAME
     [0mwall - write to all users

[1mSYNOPSIS
     wall

DESCRIPTION
     [0m_W_a_l_l reads its standard input until an end-of-file.  It then
     sends this message, preceded by `Broadcast Message ...', to
     all logged in users.

     The sender should be super-user to override any protections
     the users may have invoked.

[1mFILES
     [0m/dev/tty?
     /etc/utmp

[1mSEE ALSO
     [0mmesg(1), write(1)

[1mDIAGNOSTICS
     [0m`Cannot send to ...' when the open on a user's tty file
     fails.































Printed 10/12/92    Revision 1.2 of 19/10/88			1



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