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60 lines
1.0 KiB
60 lines
1.0 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* Copyright (C) 2002 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com) |
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*/ |
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#include <stdlib.h> |
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#include <unistd.h> |
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#include <errno.h> |
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#include <fcntl.h> |
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#include <kern_util.h> |
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#include <os.h> |
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struct grantpt_info { |
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int fd; |
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int res; |
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int err; |
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}; |
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static void grantpt_cb(void *arg) |
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{ |
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struct grantpt_info *info = arg; |
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info->res = grantpt(info->fd); |
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info->err = errno; |
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} |
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int get_pty(void) |
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{ |
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struct grantpt_info info; |
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int fd, err; |
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fd = open("/dev/ptmx", O_RDWR); |
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if (fd < 0) { |
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err = -errno; |
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printk(UM_KERN_ERR "get_pty : Couldn't open /dev/ptmx - " |
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"err = %d\n", errno); |
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return err; |
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} |
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info.fd = fd; |
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initial_thread_cb(grantpt_cb, &info); |
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if (info.res < 0) { |
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err = -info.err; |
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printk(UM_KERN_ERR "get_pty : Couldn't grant pty - " |
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"errno = %d\n", -info.err); |
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goto out; |
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} |
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if (unlockpt(fd) < 0) { |
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err = -errno; |
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printk(UM_KERN_ERR "get_pty : Couldn't unlock pty - " |
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"errno = %d\n", errno); |
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goto out; |
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} |
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return fd; |
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out: |
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close(fd); |
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return err; |
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}
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