/* * 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; }