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/*
* Copyright 1990,91 by Thomas Roell, Dinkelscherben, Germany
* Copyright 1993 by David Wexelblat <dwex@goblin.org>
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the names of Thomas Roell and David Wexelblat
* not be used in advertising or publicity pertaining to distribution of
* the software without specific, written prior permission. Thomas Roell and
* David Wexelblat makes no representations about the suitability of this
* software for any purpose. It is provided "as is" without express or
* implied warranty.
*
* THOMAS ROELL AND DAVID WEXELBLAT DISCLAIMS ALL WARRANTIES WITH REGARD TO
* THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS, IN NO EVENT SHALL THOMAS ROELL OR DAVID WEXELBLAT BE LIABLE FOR
* ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
* RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
* CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
#ifdef HAVE_XORG_CONFIG_H
#include <xorg-config.h>
#endif
#include <X11/X.h>
#include <X11/Xmd.h>
#include "compiler.h"
#include "xf86.h"
#include "xf86Priv.h"
#include "xf86_OSlib.h"
static Bool KeepTty = FALSE;
#ifdef SVR4
static Bool Protect0 = FALSE;
#endif
static int VTnum = -1;
void
xf86OpenConsole()
{
int fd;
struct vt_mode VT;
char vtname1[10],vtname2[10];
MessageType from = X_PROBED;
if (serverGeneration == 1)
{
/* check if we're run with euid==0 */
if (geteuid() != 0)
{
FatalError("xf86OpenConsole: Server must be suid root\n");
}
#ifdef SVR4
/* Protect page 0 to help find NULL dereferencing */
/* mprotect() doesn't seem to work */
if (Protect0)
{
int fd = -1;
if ((fd = open("/dev/zero", O_RDONLY, 0)) < 0)
{
xf86Msg(X_WARNING,
"xf86OpenConsole: cannot open /dev/zero (%s)\n",
strerror(errno));
}
else
{
if ((int)mmap(0, 0x1000, PROT_NONE,
MAP_FIXED | MAP_SHARED, fd, 0) == -1)
{
xf86Msg(X_WARNING,
"xf86OpenConsole: failed to protect page 0 (%s)\n",
strerror(errno));
}
close(fd);
}
}
#endif
/*
* setup the virtual terminal manager
*/
if (VTnum != -1)
{
xf86Info.vtno = VTnum;
from = X_CMDLINE;
}
else
{
if ((fd = open("/dev/console",O_WRONLY,0)) < 0)
{
FatalError(
"xf86OpenConsole: Cannot open /dev/console (%s)\n",
strerror(errno));
}
if ((ioctl(fd, VT_OPENQRY, &xf86Info.vtno) < 0) ||
(xf86Info.vtno == -1))
{
FatalError("xf86OpenConsole: Cannot find a free VT\n");
}
close(fd);
}
xf86Msg(from, "using VT number %d\n\n", xf86Info.vtno);
sprintf(vtname1,"/dev/vc%02d",xf86Info.vtno); /* ESIX */
sprintf(vtname2,"/dev/vt%02d",xf86Info.vtno); /* rest of the world */
if (!KeepTty)
{
setpgrp();
}
if (((xf86Info.consoleFd = open(vtname1, O_RDWR|O_NDELAY, 0)) < 0) &&
((xf86Info.consoleFd = open(vtname2, O_RDWR|O_NDELAY, 0)) < 0))
{
FatalError("xf86OpenConsole: Cannot open %s (%s) (%s)\n",
vtname2, vtname1, strerror(errno));
}
/* change ownership of the vt */
if (chown(vtname1, getuid(), getgid()) < 0)
{
chown(vtname2, getuid(), getgid());
}
/*
* now get the VT
*/
if (ioctl(xf86Info.consoleFd, VT_ACTIVATE, xf86Info.vtno) != 0)
{
xf86Msg(X_WARNING, "xf86OpenConsole: VT_ACTIVATE failed\n");
}
if (ioctl(xf86Info.consoleFd, VT_WAITACTIVE, xf86Info.vtno) != 0)
{
xf86Msg(X_WARNING, "xf86OpenConsole: VT_WAITACTIVE failed\n");
}
if (ioctl(xf86Info.consoleFd, VT_GETMODE, &VT) < 0)
{
FatalError("xf86OpenConsole: VT_GETMODE failed\n");
}
signal(SIGUSR1, xf86VTRequest);
VT.mode = VT_PROCESS;
VT.relsig = SIGUSR1;
VT.acqsig = SIGUSR1;
if (ioctl(xf86Info.consoleFd, VT_SETMODE, &VT) < 0)
{
FatalError("xf86OpenConsole: VT_SETMODE VT_PROCESS failed\n");
}
if (ioctl(xf86Info.consoleFd, KDSETMODE, KD_GRAPHICS) < 0)
{
FatalError("xf86OpenConsole: KDSETMODE KD_GRAPHICS failed\n");
}
}
else
{
/* serverGeneration != 1 */
/*
* now get the VT
*/
if (ioctl(xf86Info.consoleFd, VT_ACTIVATE, xf86Info.vtno) != 0)
{
xf86Msg(X_WARNING, "xf86OpenConsole: VT_ACTIVATE failed\n");
}
if (ioctl(xf86Info.consoleFd, VT_WAITACTIVE, xf86Info.vtno) != 0)
{
xf86Msg(X_WARNING, "xf86OpenConsole: VT_WAITACTIVE failed\n");
}
/*
* If the server doesn't have the VT when the reset occurs,
* this is to make sure we don't continue until the activate
* signal is received.
*/
if (!xf86Screens[0]->vtSema)
sleep(5);
}
return;
}
void
xf86CloseConsole()
{
struct vt_mode VT;
#if 0
ioctl(xf86Info.consoleFd, VT_ACTIVATE, xf86Info.vtno);
ioctl(xf86Info.consoleFd, VT_WAITACTIVE, 0);
#endif
ioctl(xf86Info.consoleFd, KDSETMODE, KD_TEXT); /* Back to text mode ... */
if (ioctl(xf86Info.consoleFd, VT_GETMODE, &VT) != -1)
{
VT.mode = VT_AUTO;
ioctl(xf86Info.consoleFd, VT_SETMODE, &VT); /* set dflt vt handling */
}
close(xf86Info.consoleFd); /* make the vt-manager happy */
return;
}
int
xf86ProcessArgument(int argc, char *argv[], int i)
{
/*
* Keep server from detaching from controlling tty. This is useful
* when debugging (so the server can receive keyboard signals.
*/
if (!strcmp(argv[i], "-keeptty"))
{
KeepTty = TRUE;
return(1);
}
#ifdef SVR4
/*
* Undocumented flag to protect page 0 from read/write to help
* catch NULL pointer dereferences. This is purely a debugging
* flag.
*/
if (!strcmp(argv[i], "-protect0"))
{
Protect0 = TRUE;
return(1);
}
#endif
if ((argv[i][0] == 'v') && (argv[i][1] == 't'))
{
if (sscanf(argv[i], "vt%2d", &VTnum) == 0)
{
UseMsg();
VTnum = -1;
return(0);
}
return(1);
}
return(0);
}
void
xf86UseMsg()
{
ErrorF("vtXX use the specified VT number\n");
ErrorF("-keeptty ");
ErrorF("don't detach controlling tty (for debugging only)\n");
return;
}
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