diff options
Diffstat (limited to 'xorg-server/hw/xfree86/os-support/usl/usl_init.c')
| -rw-r--r-- | xorg-server/hw/xfree86/os-support/usl/usl_init.c | 357 |
1 files changed, 357 insertions, 0 deletions
diff --git a/xorg-server/hw/xfree86/os-support/usl/usl_init.c b/xorg-server/hw/xfree86/os-support/usl/usl_init.c new file mode 100644 index 000000000..d27b206c8 --- /dev/null +++ b/xorg-server/hw/xfree86/os-support/usl/usl_init.c @@ -0,0 +1,357 @@ +/* + * Copyright 2001-2005 by Kean Johnston <jkj@sco.com> + * 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, David Wexelblat + * and Kean Johnston not be used in advertising or publicity pertaining to + * distribution of the software without specific, written prior permission. + * Thomas Roell, David Wexelblat and Kean Johnston make no representations + * about the suitability of this software for any purpose. It is provided + * "as is" without express or implied warranty. + * + * THOMAS ROELL, DAVID WEXELBLAT AND KEAN JOHNSTON DISCLAIM ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL THOMAS ROELLm DAVID WEXELBLAT + * OR KEAN JOHNSTON 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. + * + */ + +#include "X.h" +#include "Xmd.h" + +#include "compiler.h" + +#include "xf86.h" +#include "xf86Priv.h" +#include "xf86_OSlib.h" + +#include <sys/utsname.h> + +static Bool KeepTty = FALSE; +static Bool Protect0 = FALSE; +static Bool CRTSpecified = FALSE; +static int VTnum = -1; +static char vtdevice[48]; + +int usl_is_osr6 = -1; + +static Bool +IsConsoleDevice(const char *dev) +{ + if ((!strcmp (dev, "/dev/console")) || + (!strcmp (dev, "/dev/syscon")) || + (!strcmp (dev, "/dev/systty"))) + return TRUE; + + return FALSE; +} + +static int +is_osr6 (void) +{ + struct utsname uts; + + if (usl_is_osr6 == -1) { + if (uname (&uts) < 0) { + FatalError ("get_usl_ver: Failed to determine UNIX name (%s)\n", + strerror (errno)); + } + + if (uts.version[0] == '6') + usl_is_osr6 = 1; + else + usl_is_osr6 = 0; + } + + return usl_is_osr6; +} + + +void +xf86OpenConsole(void) +{ + int fd, i, ioctl_ret; + struct vt_mode VT; + struct vt_stat vts; + MessageType from = X_PROBED; + struct sigaction sigvtsw; + char *ttn; + + if (serverGeneration == 1) { + int isconsole = 0, consdev = 0; + + /* check if we're run with euid==0 */ + if (geteuid() != 0) { + FatalError("xf86OpenConsole: Server must be suid root\n"); + } + + /* If we are run in the background we will get SIGTTOU. Ignore it. */ + OsSignal (SIGTTOU, SIG_IGN); + + /* 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); + } + } + + /* + * setup the virtual terminal manager + */ + if (VTnum == -1) { + /* + * No device was specified. We need to query the kernel to see which + * console device we are on (and in fact if we are on a console at all). + */ + if (ioctl (0, VT_GETSTATE, &vts) < 0) { + FatalError("xf86OpenConsole: Could not query active VT: %s\n", + strerror(errno)); + } + VTnum = vts.v_active; + if (is_osr6()) + snprintf (vtdevice, sizeof(vtdevice), "/dev/tty%02d", VTnum + 1); + else + snprintf (vtdevice, sizeof(vtdevice), "/dev/vt%02d", VTnum); + } else { + from = X_CMDLINE; + if (is_osr6()) + snprintf (vtdevice, sizeof(vtdevice), "/dev/tty%02d", VTnum + 1); + else + snprintf (vtdevice, sizeof(vtdevice), "/dev/vt%02d", VTnum); + } + + if (IsConsoleDevice(vtdevice)) { + isconsole = 1; + CRTSpecified = FALSE; /* Dont honour -crt /dev/console */ + } + + if (ioctl (0, KIOCINFO, 0) >= 0) + consdev = 1 + isconsole; + + if ((!CRTSpecified) && (isconsole || (!consdev))) { + /* + * Need to find a free VT + */ + if ((fd = open ("/dev/console", O_WRONLY | O_NOCTTY)) < 0) { + FatalError ("xf86OpenConsole: Could not open /dev/console: %s\n", + strerror (errno)); + } + + if (ioctl (fd, VT_OPENQRY, &VTnum) < 0) { + FatalError ("xf86OpenConsole: Cannot find a free VT: %s\n", + strerror(errno)); + } + close (fd); + if (usl_is_osr6) + snprintf (vtdevice, sizeof(vtdevice), "/dev/tty%02d", VTnum + 1); + else + snprintf (vtdevice, sizeof(vtdevice), "/dev/vt%02d", VTnum); + } + + /* + * Now we can dispose of stdin/stdout + */ + fclose (stdin); + fclose (stdout); + + if (CRTSpecified || isconsole || consdev != 1) { + if (!KeepTty) { + setpgrp(); + } + } + + if ((xf86Info.consoleFd = open(vtdevice, O_RDWR | O_NONBLOCK, 0)) < 0) { + FatalError("xf86OpenConsole: Cannot open %s: %s\n", vtdevice, + strerror(errno)); + } + + xf86Msg (from, "using VT number %d (%s)\n\n", VTnum, vtdevice); + xf86Info.vtno = VTnum; + + /* change ownership of the vt */ + chown(vtdevice, getuid(), getgid()); + + /* + * now get the VT + */ + if (ioctl(xf86Info.consoleFd, VT_ACTIVATE, xf86Info.vtno) != 0) { + FatalError("xf86OpenConsole: VT_ACTIVATE failed: %s\n", + strerror(errno)); + } + if (ioctl(xf86Info.consoleFd, VT_WAITACTIVE, xf86Info.vtno) != 0) { + FatalError("xf86OpenConsole: VT_WAITACTIVE failed: %s\n",strerror(errno)); + } + + if (ioctl(xf86Info.consoleFd, VT_GETMODE, &VT) < 0) { + FatalError("xf86OpenConsole: VT_GETMODE failed: %s\n", strerror(errno)); + } + + sigvtsw.sa_handler = xf86VTRequest; + sigfillset(&sigvtsw.sa_mask); + sigvtsw.sa_flags = 0; + sigaction(SIGUSR1, &sigvtsw, NULL); + + VT.mode = VT_PROCESS; + VT.relsig = SIGUSR1; + VT.acqsig = SIGUSR1; + + ioctl_ret = ioctl(xf86Info.consoleFd, VT_SETMODE, &VT); + if (ioctl_ret < 0) { + FatalError("xf86OpenConsole: VT_SETMODE failed: %s\n", strerror(errno)); + } + + if (ioctl(xf86Info.consoleFd, KDSETMODE, KD_GRAPHICS) < 0) { + FatalError("xf86OpenConsole: KD_GRAPHICS failed: %s\n", strerror(errno)); + } + } else { /* serverGeneration != 1 */ + /* + * now get the VT + */ + if (ioctl(xf86Info.consoleFd, VT_ACTIVATE, xf86Info.vtno) != 0) { + FatalError("xf86OpenConsole: VT_ACTIVATE failed: %s\n", strerror(errno)); + } + if (ioctl(xf86Info.consoleFd, VT_WAITACTIVE, xf86Info.vtno) != 0) { + FatalError("xf86OpenConsole: VT_WAITACTIVE failed: %s\n",strerror(errno)); + } + /* + * 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(void) +{ + struct vt_mode VT; + struct sigaction sigvtsw; + + ioctl(xf86Info.consoleFd, KDSETMODE, KD_TEXT); /* Back to text mode ... */ + + sigvtsw.sa_handler = SIG_DFL; + sigfillset(&sigvtsw.sa_mask); + sigvtsw.sa_flags = 0; + sigaction(SIGUSR1, &sigvtsw, NULL); + + if (ioctl(xf86Info.consoleFd, VT_GETMODE, &VT) != -1) { + VT.mode = VT_AUTO; + VT.waitv = 0; + 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); + } + + /* + * 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); + } + + if ((argv[i][0] == 'v') && (argv[i][1] == 't')) { + if (sscanf(argv[i], "vt%2d", &VTnum) == 0) { + UseMsg(); + VTnum = -1; + return(0); + } + VTnum -= is_osr6(); + CRTSpecified = TRUE; + return(1); + } + + /* + * Use a device the user specifies. + */ + if (!strcmp(argv[i], "-crt")) { + if (++i > argc) { + UseMsg(); + VTnum = -1; + return(0); + } else { + char *mytty = ttyname(0); + char *arg = argv[i]; + + if (!mytty) + mytty = "\1"; + if (!arg[0]) + arg = "\2"; /* Prevent idiots from using -crt "" */ + + if (strcmp (mytty, arg) != 0) { + char *fmt; + + if (is_osr6()) + fmt = "/dev/tty%02d"; + else + fmt = "/dev/vt%02d"; + + if (sscanf(arg, fmt, &VTnum) == 0) { + UseMsg(); + VTnum = -1; + return(0); + } + + /* OSR6 devices start names at 1, UW7 starts at 0 */ + VTnum -= is_osr6(); + CRTSpecified = TRUE; + } + return(2); + } + } + return(0); +} + +void +xf86UseMsg(void) +{ + if (is_osr6()) { + ErrorF("-crt /dev/ttyXX use the specified VT device\n"); + ErrorF("vtXX use the specified VT number (01-16)\n"); + } else { + ErrorF("-crt /dev/vtXX use the specified VT device\n"); + ErrorF("vtXX use the specified VT number (00-15)\n"); + } + + ErrorF("-keeptty "); + ErrorF("don't detach controlling tty (for debugging only)\n"); + return; +} |