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/freebsd-10.0-release/usr.bin/wall/
H A Dwall.cdiff 66557 Mon Oct 02 15:31:57 MDT 2000 n_hibma Instead of printing '(null)' if there is no tty, print 'no tty'.

In the case where the program is executed by a daemon running in the
background the terminal might not have a tty. The '(null)' is confusing.

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