358 lines
9.5 KiB
C
358 lines
9.5 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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* Copyright 1999 by David Holland <davidh@iquest.net>
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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 copyright
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* notice and this permission notice appear in supporting documentation, and
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* that the names of the copyright holders not be used in advertising or
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* publicity pertaining to distribution of the software without specific,
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* written prior permission. The copyright holders make no representations
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* about the suitability of this software for any purpose. It is provided "as
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* is" without express or implied warranty.
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*
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* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, AND IN NO
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* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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* OF THIS SOFTWARE.
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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 "xf86.h"
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#include "xf86Priv.h"
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#include "xf86_OSlib.h"
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#if defined(__i386__) || defined(__i386) || defined(__x86)
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# include <sys/kd.h>
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#endif
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static Bool KeepTty = FALSE;
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static Bool Protect0 = FALSE;
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#ifdef HAS_USL_VTS
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static int VTnum = -1;
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static int xf86StartVT = -1;
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#endif
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#if defined(__SOL8__) || (!defined(__i386__) && !defined(__i386))
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static char fb_dev[PATH_MAX] = "/dev/fb";
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#else
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static char fb_dev[PATH_MAX] = "/dev/console";
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#endif
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void
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xf86OpenConsole(void)
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{
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#ifdef HAS_USL_VTS
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int fd, i;
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struct vt_mode VT;
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struct vt_stat vtinfo;
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int FreeVTslot;
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MessageType from = X_PROBED;
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#endif
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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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FatalError("xf86OpenConsole: Server must be suid root\n");
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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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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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close(fd);
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}
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}
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#ifdef HAS_USL_VTS
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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/vt00",O_RDWR,0)) < 0)
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FatalError("xf86OpenConsole: Cannot open /dev/vt00 (%s)\n",
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strerror(errno));
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if (ioctl(fd, VT_GETSTATE, &vtinfo) < 0)
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FatalError("xf86OpenConsole: Cannot determine current VT\n");
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xf86StartVT = vtinfo.v_active;
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/*
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* There is a SEVERE problem with x86's VT's. The VT_OPENQRY
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* ioctl() will panic the entire system if all 8 (7 VT's+Console)
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* terminals are used. The only other way I've found to determine
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* if there is a free VT is to try activating all the the available
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* VT's and see if they all succeed - if they do, there there is no
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* free VT, and the Xserver cannot continue without panic'ing the
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* system. (It's ugly, but it seems to work.) Note there is a
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* possible race condition here.
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*
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* David Holland 2/23/94
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*/
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FreeVTslot = 0;
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for (i = 7; (i >= 0) && !FreeVTslot; i--)
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if (ioctl(fd, VT_ACTIVATE, i) != 0)
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FreeVTslot = 1;
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if (!FreeVTslot ||
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(ioctl(fd, VT_OPENQRY, &xf86Info.vtno) < 0) ||
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(xf86Info.vtno == -1))
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FatalError("xf86OpenConsole: Cannot find a free VT\n");
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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(fb_dev, "/dev/vt%02d", xf86Info.vtno); /* Solaris 2.1 x86 */
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#endif /* HAS_USL_VTS */
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if (!KeepTty)
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setpgrp();
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if (((xf86Info.consoleFd = open(fb_dev, O_RDWR | O_NDELAY, 0)) < 0))
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FatalError("xf86OpenConsole: Cannot open %s (%s)\n",
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fb_dev, strerror(errno));
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#ifdef HAS_USL_VTS
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/* Change ownership of the vt */
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chown(fb_dev, getuid(), getgid());
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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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xf86Msg(X_WARNING, "xf86OpenConsole: VT_ACTIVATE failed\n");
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if (ioctl(xf86Info.consoleFd, VT_WAITACTIVE, xf86Info.vtno) != 0)
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xf86Msg(X_WARNING, "xf86OpenConsole: VT_WAITACTIVE failed\n");
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if (ioctl(xf86Info.consoleFd, VT_GETMODE, &VT) < 0)
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FatalError("xf86OpenConsole: VT_GETMODE failed\n");
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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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FatalError("xf86OpenConsole: VT_SETMODE VT_PROCESS failed\n");
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#endif
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#ifdef KDSETMODE
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if (ioctl(xf86Info.consoleFd, KDSETMODE, KD_GRAPHICS) < 0)
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FatalError("xf86OpenConsole: KDSETMODE KD_GRAPHICS failed\n");
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#endif
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}
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else /* serverGeneration != 1 */
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{
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#ifdef HAS_USL_VTS
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/*
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* Now re-get the VT
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*/
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if (ioctl(xf86Info.consoleFd, VT_ACTIVATE, xf86Info.vtno) != 0)
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xf86Msg(X_WARNING, "xf86OpenConsole: VT_ACTIVATE failed\n");
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if (ioctl(xf86Info.consoleFd, VT_WAITACTIVE, xf86Info.vtno) != 0)
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xf86Msg(X_WARNING, "xf86OpenConsole: VT_WAITACTIVE failed\n");
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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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#endif /* HAS_USL_VTS */
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}
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}
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void
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xf86CloseConsole(void)
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{
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#ifdef HAS_USL_VTS
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struct vt_mode VT;
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#endif
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#if !defined(__i386__) && !defined(__i386) && !defined(__x86)
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if (!xf86DoProbe && !xf86DoConfigure) {
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int fd;
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/*
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* Wipe out framebuffer just like the non-SI Xsun server does. This
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* could be improved by saving framebuffer contents in
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* xf86OpenConsole() above and restoring them here. Also, it's unclear
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* at this point whether this should be done for all framebuffers in
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* the system, rather than only the console.
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*/
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if ((fd = open("/dev/fb", O_RDWR, 0)) < 0) {
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xf86Msg(X_WARNING,
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"xf86CloseConsole(): unable to open framebuffer (%s)\n",
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strerror(errno));
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} else {
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struct fbgattr fbattr;
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if ((ioctl(fd, FBIOGATTR, &fbattr) < 0) &&
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(ioctl(fd, FBIOGTYPE, &fbattr.fbtype) < 0)) {
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xf86Msg(X_WARNING,
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"xf86CloseConsole(): unable to retrieve framebuffer"
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" attributes (%s)\n", strerror(errno));
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} else {
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pointer fbdata;
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fbdata = mmap(NULL, fbattr.fbtype.fb_size,
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PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
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if (fbdata == MAP_FAILED) {
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xf86Msg(X_WARNING,
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"xf86CloseConsole(): unable to mmap framebuffer"
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" (%s)\n", strerror(errno));
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} else {
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(void)memset(fbdata, 0, fbattr.fbtype.fb_size);
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(void)munmap(fbdata, fbattr.fbtype.fb_size);
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}
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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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#ifdef KDSETMODE
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/* Reset the display back to text mode */
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ioctl(xf86Info.consoleFd, KDSETMODE, KD_TEXT);
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#endif
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#ifdef HAS_USL_VTS
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/*
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* Solaris 2.1 x86 doesn't seem to "switch" back to the console when the VT
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* is relinquished and its mode is reset to auto. Also, Solaris 2.1 seems
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* to associate vt00 with the console so I've opened the "console" back up
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* and made it the active vt again in text mode and then closed it. There
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* must be a better hack for this but I'm not aware of one at this time.
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*
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* Doug Anson 11/6/93
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* danson@lgc.com
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*
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* Fixed - 12/5/93 - David Holland - davidh@dorite.use.com
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* Did the whole thing similarly to the way linux does it
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*/
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if (ioctl(xf86Info.consoleFd, VT_GETMODE, &VT) != -1)
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{
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VT.mode = VT_AUTO; /* Set default vt handling */
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ioctl(xf86Info.consoleFd, VT_SETMODE, &VT);
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}
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/* Activate the VT that X was started on */
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ioctl(xf86Info.consoleFd, VT_ACTIVATE, xf86StartVT);
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#endif /* HAS_USL_VTS */
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close(xf86Info.consoleFd);
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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 when
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* 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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/*
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* Undocumented flag to protect page 0 from read/write to help catch NULL
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* pointer dereferences. This is purely a debugging 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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#ifdef HAS_USL_VTS
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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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#endif /* HAS_USL_VTS */
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#if defined(__SOL8__) || (!defined(__i386__) && !defined(__i386))
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if ((i + 1) < argc) {
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if (!strcmp(argv[i], "-dev")) {
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strncpy(fb_dev, argv[i+1], PATH_MAX);
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fb_dev[PATH_MAX - 1] = '\0';
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return 2;
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}
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}
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#endif
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return 0;
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}
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void xf86UseMsg()
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{
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#ifdef HAS_USL_VTS
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ErrorF("vtXX Use the specified VT number\n");
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#endif
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#if defined(__SOL8__) || !defined(__i386__)
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ErrorF("-dev <fb> Framebuffer device\n");
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#endif
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ErrorF("-keeptty Don't detach controlling tty\n");
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ErrorF(" (for debugging only)\n");
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}
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