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login_tty
Documentation:
Gnulib module: login_tty
Portability problems fixed by Gnulib:
-lutil
on some platforms:
glibc 2.3.6, FreeBSD 13.0, NetBSD 5.0, OpenBSD 3.8.
It is available without link options on other platforms:
macOS 11.1, Cygwin.
Portability problems not fixed by Gnulib:
<utmp.h>
on glibc, Cygwin,
in <util.h>
on macOS 11.1, NetBSD 5.0, OpenBSD 3.8,
and in <libutil.h>
on FreeBSD 13.0, Haiku.
Also note that <sys/types.h>
is
a prerequisite of <utmp.h>
on FreeBSD 8.0, OpenBSD 4.6 and
of <libutil.h>
on FreeBSD 8.0.