1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
 
 4 */
 5
 6#include <stdlib.h>
 7#include <unistd.h>
 8#include <errno.h>
 9#include <fcntl.h>
10#include <kern_util.h>
11#include <os.h>
 
 
12
13struct grantpt_info {
14	int fd;
15	int res;
16	int err;
17};
18
19static void grantpt_cb(void *arg)
20{
21	struct grantpt_info *info = arg;
22
23	info->res = grantpt(info->fd);
24	info->err = errno;
25}
26
27int get_pty(void)
28{
29	struct grantpt_info info;
30	int fd, err;
31
32	fd = open("/dev/ptmx", O_RDWR);
33	if (fd < 0) {
34		err = -errno;
35		printk(UM_KERN_ERR "get_pty : Couldn't open /dev/ptmx - "
36		       "err = %d\n", errno);
37		return err;
38	}
39
40	info.fd = fd;
41	initial_thread_cb(grantpt_cb, &info);
42
43	if (info.res < 0) {
44		err = -info.err;
45		printk(UM_KERN_ERR "get_pty : Couldn't grant pty - "
46		       "errno = %d\n", -info.err);
47		goto out;
48	}
49
50	if (unlockpt(fd) < 0) {
51		err = -errno;
52		printk(UM_KERN_ERR "get_pty : Couldn't unlock pty - "
53		       "errno = %d\n", errno);
54		goto out;
55	}
56	return fd;
57out:
58	close(fd);
59	return err;
60}

 
 1/*
 2 * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
 3 * Licensed under the GPL
 4 */
 5
 6#include <stdlib.h>
 7#include <unistd.h>
 8#include <errno.h>
 9#include <fcntl.h>
10#include "kern_constants.h"
11#include "kern_util.h"
12#include "os.h"
13#include "user.h"
14
15struct grantpt_info {
16	int fd;
17	int res;
18	int err;
19};
20
21static void grantpt_cb(void *arg)
22{
23	struct grantpt_info *info = arg;
24
25	info->res = grantpt(info->fd);
26	info->err = errno;
27}
28
29int get_pty(void)
30{
31	struct grantpt_info info;
32	int fd, err;
33
34	fd = open("/dev/ptmx", O_RDWR);
35	if (fd < 0) {
36		err = -errno;
37		printk(UM_KERN_ERR "get_pty : Couldn't open /dev/ptmx - "
38		       "err = %d\n", errno);
39		return err;
40	}
41
42	info.fd = fd;
43	initial_thread_cb(grantpt_cb, &info);
44
45	if (info.res < 0) {
46		err = -info.err;
47		printk(UM_KERN_ERR "get_pty : Couldn't grant pty - "
48		       "errno = %d\n", -info.err);
49		goto out;
50	}
51
52	if (unlockpt(fd) < 0) {
53		err = -errno;
54		printk(UM_KERN_ERR "get_pty : Couldn't unlock pty - "
55		       "errno = %d\n", errno);
56		goto out;
57	}
58	return fd;
59out:
60	close(fd);
61	return err;
62}