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(such as for the newline, backspace, or carriage return characters), they do not
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advance the current cursor position, they do not expand other control characters
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to ^-escapes, and they truncate the string if it crosses the right margin,
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All routines return the integer \fBERR\fR upon failure and \fBOK\fR on success
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(the SVr4 manuals specify only "an integer value other than \fBERR\fR") upon