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| /*
| * Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
| * Licensed under the GPL
| */
|
| #include <stdlib.h>
| #include <unistd.h>
| #include <errno.h>
| #include <fcntl.h>
| #include <kern_util.h>
| #include <os.h>
|
| struct grantpt_info {
| int fd;
| int res;
| int err;
| };
|
| static void grantpt_cb(void *arg)
| {
| struct grantpt_info *info = arg;
|
| info->res = grantpt(info->fd);
| info->err = errno;
| }
|
| int get_pty(void)
| {
| struct grantpt_info info;
| int fd, err;
|
| fd = open("/dev/ptmx", O_RDWR);
| if (fd < 0) {
| err = -errno;
| printk(UM_KERN_ERR "get_pty : Couldn't open /dev/ptmx - "
| "err = %d\n", errno);
| return err;
| }
|
| info.fd = fd;
| initial_thread_cb(grantpt_cb, &info);
|
| if (info.res < 0) {
| err = -info.err;
| printk(UM_KERN_ERR "get_pty : Couldn't grant pty - "
| "errno = %d\n", -info.err);
| goto out;
| }
|
| if (unlockpt(fd) < 0) {
| err = -errno;
| printk(UM_KERN_ERR "get_pty : Couldn't unlock pty - "
| "errno = %d\n", errno);
| goto out;
| }
| return fd;
| out:
| close(fd);
| return err;
| }
|
|
