ttyname, ttyname_r — return name of a terminal
returns a pointer to the null-terminated pathname of the
terminal device that is open on the file descriptor
fd, or NULL on error
(for example, if
is not connected to a terminal). The return value may point
to static data, possibly overwritten by the next call. The
this pathname in the buffer
buf of length
returns a pointer to a pathname on success. On error, NULL is
errno is set
appropriately. The function
ttyname_r() returns 0 on success, and an
error number upon error.
Bad file descriptor.
File descriptor does not refer to a terminal device.
buflen was too
small to allow storing the pathname.
For an explanation of the terms used in this section, see attributes(7).
||Thread safety||MT-Unsafe race:ttyname|
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Copyright (c) 1995 Jim Van Zandt <jrvvanzandt.mv.com>
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Modified 2001-12-13, Martin Schulze <joeyinfodrom.org>
Added ttyname_r, aeb, 2002-07-20