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