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/* vcons-open.c - Open a virtual console.
Copyright (C) 2002 Free Software Foundation, Inc.
Written by Marcus Brinkmann.
This file is part of the GNU Hurd.
The GNU Hurd is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2, or (at
your option) any later version.
The GNU Hurd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111, USA. */
#include <errno.h>
#include <unistd.h>
#include <stdio.h>
#include <sys/mman.h>
#include <sys/fcntl.h>
#include <hurd.h>
#include <mach.h>
#include "cons.h"
/* Open the virtual console for VCONS_ENTRY. CONS is locked.
Afterwards, R_VCONS will be locked. */
error_t
cons_vcons_open (cons_t cons, vcons_list_t vcons_entry, vcons_t *r_vcons)
{
error_t err = 0;
char *name;
file_t vconsp = MACH_PORT_NULL;
file_t file = MACH_PORT_NULL;
int fd = -1;
struct stat statbuf;
mach_port_t notify = MACH_PORT_NULL;
vcons_t vcons;
if (asprintf (&name, "%u", vcons_entry->id) < 0)
return err;
/* Set up the port we receive notification messages on. */
err = ports_create_port (cons_port_class, cons_port_bucket,
sizeof (*vcons), &vcons);
if (err)
goto err;
vcons->notify.cons = NULL;
vcons->cons = cons;
vcons->vcons_entry = vcons_entry;
vcons->id = vcons_entry->id;
mutex_init (&vcons->lock);
vcons->input = -1;
vcons->display = MAP_FAILED;
vcons->scrolling = 0;
/* Open the directory port of the virtual console. */
vconsp = file_name_lookup_under (cons->dirport, name,
O_DIRECTORY | O_RDONLY, 0);
if (vconsp == MACH_PORT_NULL)
{
err = errno;
goto err;
}
/* Within that directory, open the input node. */
file = file_name_lookup_under (vconsp, "input", O_WRONLY /* | O_NONBLOCK */, 0);
if (file == MACH_PORT_NULL)
err = errno;
else
{
vcons->input = openport (file, O_WRONLY /* | O_NONBLOCK */);
if (vcons->input < 0)
err = errno;
else
/* openport() consumed the reference. */
file = MACH_PORT_NULL;
}
if (err)
goto err;
/* Within that directory, also open the display node. */
file = file_name_lookup_under (vconsp, "display", O_RDONLY, 0);
if (file == MACH_PORT_NULL)
err = errno;
else
{
/* Acquire an additional reference for openport(). */
err = mach_port_mod_refs (mach_task_self (), file,
MACH_PORT_RIGHT_SEND, +1);
if (err)
goto err;
fd = openport (file, O_RDONLY);
if (fd < 0)
err = errno;
}
if (err)
goto err;
/* Map the whole file. */
if (fstat (fd, &statbuf) < 0)
{
err = errno;
goto err;
}
vcons->display_size = statbuf.st_size;
vcons->display = mmap (0, vcons->display_size, PROT_READ, MAP_SHARED, fd, 0);
if (vcons->display == MAP_FAILED)
{
err = errno;
goto err;
}
if (vcons->display->magic != CONS_MAGIC
|| vcons->display->version >> CONS_VERSION_MAJ_SHIFT != 0)
{
err = EINVAL;
goto err;
}
vcons->state.screen.width = vcons->display->screen.width;
vcons->state.screen.height = vcons->display->screen.height;
vcons->state.screen.lines = vcons->display->screen.lines;
vcons->state.screen.matrix = (conchar_t *)
(((uint32_t *) vcons->display) + vcons->display->screen.matrix);
vcons->state.changes.length = vcons->display->changes.length;
vcons->state.changes.buffer = (cons_change_t *)
(((uint32_t *) vcons->display) + vcons->display->changes.buffer);
/* Request notification messages. */
notify = ports_get_right (vcons);
mach_port_set_qlimit (mach_task_self (), notify, 1);
/* When this succeeds, we will immediately receive notification
messages for this virtual console. */
mutex_lock (&vcons->lock);
err = file_notice_changes (file, notify, MACH_MSG_TYPE_MAKE_SEND);
if (!err)
{
*r_vcons = vcons;
goto out;
}
err:
if (vcons->input >= 0)
{
close (vcons->input);
vcons->input = -1;
}
if (vcons->display != MAP_FAILED)
{
munmap (vcons->display, vcons->display_size);
vcons->display = MAP_FAILED;
}
if (notify)
{
mach_port_deallocate (mach_task_self (), notify);
ports_port_deref (vcons);
}
ports_destroy_right (vcons);
out:
if (fd > 0)
close (fd);
if (file != MACH_PORT_NULL)
mach_port_deallocate (mach_task_self (), file);
if (vconsp != MACH_PORT_NULL)
mach_port_deallocate (mach_task_self (), vconsp);
free (name);
return err;
}
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