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12.117.13 login_tty

Documentation:

• https://www.gnu.org/software/libc/manual/html_node/Logging-In-and-Out.html,
• man login_tty.

Gnulib module: login_tty

Portability problems fixed by Gnulib:

• 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.
• This function requires linking with -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:

• This function is missing on some platforms: mingw, MSVC 14.
• This function is declared in <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.