1 // SPDX-License-Identifier: GPL-2.0
3 * Copyright (C) 2001 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
6 #include <linux/slab.h>
7 #include <linux/completion.h>
8 #include <linux/irqreturn.h>
15 struct completion ready;
21 static irqreturn_t xterm_interrupt(int irq, void *data)
23 struct xterm_wait *xterm = data;
26 fd = os_rcv_fd(xterm->fd, &xterm->pid);
31 complete(&xterm->ready);
36 int xterm_fd(int socket, int *pid_out)
38 struct xterm_wait *data;
41 data = kmalloc(sizeof(*data), GFP_KERNEL);
43 printk(KERN_ERR "xterm_fd : failed to allocate xterm_wait\n");
47 /* This is a locked semaphore... */
48 *data = ((struct xterm_wait) { .fd = socket,
51 init_completion(&data->ready);
53 err = um_request_irq(XTERM_IRQ, socket, IRQ_READ, xterm_interrupt,
54 IRQF_SHARED, "xterm", data);
56 printk(KERN_ERR "xterm_fd : failed to get IRQ for xterm, "
62 /* ... so here we wait for an xterm interrupt.
64 * XXX Note, if the xterm doesn't work for some reason (eg. DISPLAY
65 * isn't set) this will hang... */
66 wait_for_completion(&data->ready);
68 um_free_irq(XTERM_IRQ, data);