diff options
Diffstat (limited to 'libc/termios/tcgetpgrp.c')
-rw-r--r-- | libc/termios/tcgetpgrp.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/libc/termios/tcgetpgrp.c b/libc/termios/tcgetpgrp.c new file mode 100644 index 000000000..241670770 --- /dev/null +++ b/libc/termios/tcgetpgrp.c @@ -0,0 +1,36 @@ +/* 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> + +libc_hidden_proto(tcgetpgrp) +libc_hidden_proto(ioctl) + +/* Return the foreground process group ID of FD. */ +pid_t tcgetpgrp (int fd) +{ + int pgrp; + + if (ioctl (fd, TIOCGPGRP, &pgrp) < 0) + return (pid_t) -1; + return (pid_t) pgrp; +} +libc_hidden_def (tcgetpgrp) |