blob: 038da52c549f4c171ec99f6ecf4799daa214f2c8 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
|
/* Copyright (C) 1991-2022 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, see
<https://www.gnu.org/licenses/>. */
#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)
{
int pgrp;
if (__ioctl (fd, TIOCGPGRP, &pgrp) < 0)
return (pid_t) -1;
return (pid_t) pgrp;
}
libc_hidden_def (tcgetpgrp)
|
