It assigns exit code 4 to \*(``invalid operand\*('',
which may be the same as \fIunknown capability\fP.
For instance, the source code for Solaris' xcurses uses the term
It assigns exit code 4 to \*(``invalid operand\*('',
which may be the same as \fIunknown capability\fP.
For instance, the source code for Solaris' xcurses uses the term