358 lines
9.3 KiB
C
358 lines
9.3 KiB
C
/*
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* Copyright 2001-2005 by Kean Johnston <jkj@sco.com>
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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, David Wexelblat
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* and Kean Johnston not be used in advertising or publicity pertaining to
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* distribution of the software without specific, written prior permission.
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* Thomas Roell, David Wexelblat and Kean Johnston make no representations
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* about the suitability of this software for any purpose. It is provided
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* "as is" without express or implied warranty.
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*
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* THOMAS ROELL, DAVID WEXELBLAT AND KEAN JOHNSTON DISCLAIM ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL THOMAS ROELLm DAVID WEXELBLAT
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* OR KEAN JOHNSTON BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
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* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
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* ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
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* THIS SOFTWARE.
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*
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*/
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#include "X.h"
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#include "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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#include <sys/utsname.h>
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static Bool KeepTty = FALSE;
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static Bool Protect0 = FALSE;
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static Bool CRTSpecified = FALSE;
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static int VTnum = -1;
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static char vtdevice[48];
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int usl_is_osr6 = -1;
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static Bool
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IsConsoleDevice(const char *dev)
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{
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if ((!strcmp (dev, "/dev/console")) ||
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(!strcmp (dev, "/dev/syscon")) ||
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(!strcmp (dev, "/dev/systty")))
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return TRUE;
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return FALSE;
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}
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static int
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is_osr6 (void)
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{
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struct utsname uts;
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if (usl_is_osr6 == -1) {
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if (uname (&uts) < 0) {
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FatalError ("get_usl_ver: Failed to determine UNIX name (%s)\n",
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strerror (errno));
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}
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if (uts.version[0] == '6')
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usl_is_osr6 = 1;
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else
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usl_is_osr6 = 0;
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}
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return usl_is_osr6;
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}
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void
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xf86OpenConsole(void)
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{
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int fd, i, ioctl_ret;
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struct vt_mode VT;
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struct vt_stat vts;
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MessageType from = X_PROBED;
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struct sigaction sigvtsw;
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char *ttn;
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if (serverGeneration == 1) {
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int isconsole = 0, consdev = 0;
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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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}
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/* If we are run in the background we will get SIGTTOU. Ignore it. */
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OsSignal (SIGTTOU, SIG_IGN);
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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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int fd = -1;
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if ((fd = open("/dev/zero", O_RDONLY, 0)) < 0) {
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xf86Msg(X_WARNING, "xf86OpenConsole: cannot open /dev/zero (%s)\n",
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strerror(errno));
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} else {
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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, "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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/*
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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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* No device was specified. We need to query the kernel to see which
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* console device we are on (and in fact if we are on a console at all).
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*/
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if (ioctl (0, VT_GETSTATE, &vts) < 0) {
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FatalError("xf86OpenConsole: Could not query active VT: %s\n",
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strerror(errno));
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}
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VTnum = vts.v_active;
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if (is_osr6())
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snprintf (vtdevice, sizeof(vtdevice), "/dev/tty%02d", VTnum + 1);
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else
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snprintf (vtdevice, sizeof(vtdevice), "/dev/vt%02d", VTnum);
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} else {
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from = X_CMDLINE;
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if (is_osr6())
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snprintf (vtdevice, sizeof(vtdevice), "/dev/tty%02d", VTnum + 1);
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else
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snprintf (vtdevice, sizeof(vtdevice), "/dev/vt%02d", VTnum);
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}
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if (IsConsoleDevice(vtdevice)) {
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isconsole = 1;
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CRTSpecified = FALSE; /* Dont honour -crt /dev/console */
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}
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if (ioctl (0, KIOCINFO, 0) >= 0)
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consdev = 1 + isconsole;
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if ((!CRTSpecified) && (isconsole || (!consdev))) {
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/*
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* Need to find a free VT
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*/
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if ((fd = open ("/dev/console", O_WRONLY | O_NOCTTY)) < 0) {
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FatalError ("xf86OpenConsole: Could not open /dev/console: %s\n",
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strerror (errno));
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}
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if (ioctl (fd, VT_OPENQRY, &VTnum) < 0) {
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FatalError ("xf86OpenConsole: Cannot find a free VT: %s\n",
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strerror(errno));
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}
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close (fd);
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if (usl_is_osr6)
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snprintf (vtdevice, sizeof(vtdevice), "/dev/tty%02d", VTnum + 1);
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else
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snprintf (vtdevice, sizeof(vtdevice), "/dev/vt%02d", VTnum);
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}
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/*
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* Now we can dispose of stdin/stdout
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*/
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fclose (stdin);
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fclose (stdout);
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if (CRTSpecified || isconsole || consdev != 1) {
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if (!KeepTty) {
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setpgrp();
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}
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}
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if ((xf86Info.consoleFd = open(vtdevice, O_RDWR | O_NONBLOCK, 0)) < 0) {
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FatalError("xf86OpenConsole: Cannot open %s: %s\n", vtdevice,
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strerror(errno));
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}
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xf86Msg (from, "using VT number %d (%s)\n\n", VTnum, vtdevice);
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xf86Info.vtno = VTnum;
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/* change ownership of the vt */
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chown(vtdevice, 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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FatalError("xf86OpenConsole: VT_ACTIVATE failed: %s\n",
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strerror(errno));
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}
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if (ioctl(xf86Info.consoleFd, VT_WAITACTIVE, xf86Info.vtno) != 0) {
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FatalError("xf86OpenConsole: VT_WAITACTIVE failed: %s\n",strerror(errno));
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}
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if (ioctl(xf86Info.consoleFd, VT_GETMODE, &VT) < 0) {
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FatalError("xf86OpenConsole: VT_GETMODE failed: %s\n", strerror(errno));
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}
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sigvtsw.sa_handler = xf86VTRequest;
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sigfillset(&sigvtsw.sa_mask);
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sigvtsw.sa_flags = 0;
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sigaction(SIGUSR1, &sigvtsw, NULL);
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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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ioctl_ret = ioctl(xf86Info.consoleFd, VT_SETMODE, &VT);
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if (ioctl_ret < 0) {
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FatalError("xf86OpenConsole: VT_SETMODE failed: %s\n", strerror(errno));
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}
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if (ioctl(xf86Info.consoleFd, KDSETMODE, KD_GRAPHICS) < 0) {
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FatalError("xf86OpenConsole: KD_GRAPHICS failed: %s\n", strerror(errno));
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}
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} else { /* 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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FatalError("xf86OpenConsole: VT_ACTIVATE failed: %s\n", strerror(errno));
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}
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if (ioctl(xf86Info.consoleFd, VT_WAITACTIVE, xf86Info.vtno) != 0) {
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FatalError("xf86OpenConsole: VT_WAITACTIVE failed: %s\n",strerror(errno));
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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(void)
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{
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struct vt_mode VT;
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struct sigaction sigvtsw;
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ioctl(xf86Info.consoleFd, KDSETMODE, KD_TEXT); /* Back to text mode ... */
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sigvtsw.sa_handler = SIG_DFL;
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sigfillset(&sigvtsw.sa_mask);
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sigvtsw.sa_flags = 0;
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sigaction(SIGUSR1, &sigvtsw, NULL);
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if (ioctl(xf86Info.consoleFd, VT_GETMODE, &VT) != -1) {
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VT.mode = VT_AUTO;
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VT.waitv = 0;
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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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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
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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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Protect0 = TRUE;
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return(1);
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}
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if ((argv[i][0] == 'v') && (argv[i][1] == 't')) {
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if (sscanf(argv[i], "vt%2d", &VTnum) == 0) {
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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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VTnum -= is_osr6();
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CRTSpecified = TRUE;
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return(1);
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}
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/*
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* Use a device the user specifies.
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*/
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if (!strcmp(argv[i], "-crt")) {
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if (++i > argc) {
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UseMsg();
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VTnum = -1;
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return(0);
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} else {
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char *mytty = ttyname(0);
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char *arg = argv[i];
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if (!mytty)
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mytty = "\1";
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if (!arg[0])
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arg = "\2"; /* Prevent idiots from using -crt "" */
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if (strcmp (mytty, arg) != 0) {
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char *fmt;
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if (is_osr6())
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fmt = "/dev/tty%02d";
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else
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fmt = "/dev/vt%02d";
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if (sscanf(arg, fmt, &VTnum) == 0) {
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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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/* OSR6 devices start names at 1, UW7 starts at 0 */
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VTnum -= is_osr6();
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CRTSpecified = TRUE;
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}
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return(2);
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}
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}
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return(0);
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}
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void
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xf86UseMsg(void)
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{
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if (is_osr6()) {
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ErrorF("-crt /dev/ttyXX use the specified VT device\n");
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ErrorF("vtXX use the specified VT number (01-16)\n");
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} else {
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ErrorF("-crt /dev/vtXX use the specified VT device\n");
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ErrorF("vtXX use the specified VT number (00-15)\n");
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}
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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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