LOGIN_TTY(3)           FreeBSD Library Functions Manual           LOGIN_TTY(3)

NAME
     login_tty - prepare a tty for a new login session

LIBRARY
     System Utilities Library (libutil, -lutil)

SYNOPSIS
     #include <libutil.h>

     int
     login_tty(int fd);

DESCRIPTION
     The function login_tty() prepares a terminal for a new login session.
     The file descriptor fd passed to login_tty() must be opened for reading
     and writing on a terminal device.  It will be made the controlling
     terminal for the calling process, after allocating a new session with
     setsid(2).  This terminal device will also be made the standard input,
     standard output, and standard error output of the calling process.

RETURN VALUES
     The login_tty() function returns -1 if it could not make the device
     referenced by fd the controlling terminal of the calling process, and 0
     otherwise.

SEE ALSO
     dup2(2), ioctl(2), setsid(2), tty(4)

HISTORY
     The function login_tty() first appeared in 4.4BSD.

FreeBSD 13.1-RELEASE-p6          May 10, 2020          FreeBSD 13.1-RELEASE-p6