/* $XFree86: xc/programs/Xserver/hw/xfree86/os-support/sysv/sysv_init.c,v 3.4.4.3 1998/07/18 17:53:57 dawes Exp $ */ /* * Copyright 1990,91 by Thomas Roell, Dinkelscherben, Germany * Copyright 1993 by David Wexelblat * * 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. * */ /* $XConsortium: sysv_init.c /main/4 1996/02/21 17:54:31 kaleb $ */ #include "X.h" #include "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; }