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@node login_tty
@subsection @code{login_tty}
@findex login_tty
Documentation:
@itemize
@item
@ifinfo
@ref{Logging In and Out,,Logging In and Out,libc},
@end ifinfo
@ifnotinfo
@url{https://www.gnu.org/software/libc/manual/html_node/Logging-In-and-Out.html},
@end ifnotinfo
@item
@uref{https://www.kernel.org/doc/man-pages/online/pages/man3/login_tty.3.html,,man login_tty}.
@end itemize
Gnulib module: login_tty
Portability problems fixed by Gnulib:
@itemize
@item
This function is missing on some platforms:
Minix 3.1.8, AIX 5.1, HP-UX 11, IRIX 6.5, Solaris 11.3, Android 5.1.
@item
This function is declared in @code{<utmp.h>} on glibc, Cygwin, Android,
in @code{<util.h>} on macOS 11.1, NetBSD 5.0, OpenBSD 3.8,
in @code{<libutil.h>} on FreeBSD 13.0, Haiku,
and in @code{<termios.h>} on Solaris 11.4.
@c Also note that @code{<sys/types.h>} is
@c a prerequisite of @code{<utmp.h>} on FreeBSD 8.0, OpenBSD 4.6 and
@c of @code{<libutil.h>} on FreeBSD 8.0.
@item
This function requires linking with @code{-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.
@end itemize
Portability problems not fixed by Gnulib:
@itemize
@item
This function is missing on some platforms:
mingw, MSVC 14.
@end itemize
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