/* Copyright (C) 1991, 1997, 2002 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #include <sys/ioctl.h> #include <errno.h> #include <unistd.h> #include <sys/types.h> /* Return the foreground process group ID of FD. */ pid_t tcgetpgrp (int fd) { pid_t pgrp; if (ioctl (fd, TIOCGPGRP, &pgrp) < 0) return -1; return pgrp; } libc_hidden_def (tcgetpgrp)