aboutsummaryrefslogtreecommitdiff
path: root/nx-X11/programs/Xserver/hw/xfree86/os-support/sco/sco_init.c
blob: bc1f3b56d7b36d597eef138832adf2427d57123d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
/* $XFree86: xc/programs/Xserver/hw/xfree86/os-support/sco/sco_init.c,v 3.13 2002/06/03 21:22:10 dawes Exp $ */
/*
 * Copyright 2001-2005 by J. Kean Johnston <jkj@sco.com>
 *
 * 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 name J. Kean Johnston not be used in
 * advertising or publicity pertaining to distribution of the software without
 * specific, written prior permission.  J. Kean Johnston makes no
 * representations about the suitability of this software for any purpose.
 * It is provided "as is" without express or implied warranty.
 *
 * J. KEAN JOHNSTON DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
 * EVENT SHALL J. 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.
 */
/* $XConsortium$ */

/* Re-written May 2001 to represent the current state of reality */

#ifdef HAVE_XORG_CONFIG_H
#include <xorg-config.h>
#endif

#include <X11/X.h>
#include <X11/Xmd.h>

#include "compiler.h"

#include "xf86.h"
#include "xf86Priv.h"
#include "xf86_OSlib.h"

static Bool KeepTty = FALSE;
static int VTnum = -1;
static char vtdevice[48];
static int sco_console_mode = -1;

extern Bool mpxLock;

void
xf86OpenConsole(void)
{
  int i, ioctl_ret;
  struct vt_mode VT;
  struct vid_info vidinf;
  struct sigaction sigvtsw;
  char *ttn;

  if (serverGeneration == 1) {
    /* check if we're run with euid==0 */
    if (geteuid() != 0) {
      FatalError("xf86OpenConsole: Server must be setuid root\n");
    }

    /* If we are run in the background we will get SIGTTOU. Ignore it. */
    OsSignal (SIGTTOU, SIG_IGN);

    /*
     * Set up the virtual terminal (multiscreen in SCO parlance).
     * For the actual console itself, screens are numbered from
     * 1 to (usually) 16. However, it is possible to have a nested
     * server, and it is also possible to be on a multi-console
     * system such as MaxSpeed or SunRiver. Therefore, we should
     * not make any assumptions about the TTY name we are on, and
     * instead we rely on ttyname() to give us the real TTY name.
     * Previously, we tried to determine the TTY name manually.
     * This is wrong. The only time we need to futz with the TTY name
     * is if we were given the name of a TTY to run on explicity on
     * the command line.
     */

    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).
       */
      ttn = ttyname (1);

      if (ttn == (char *)0) {
	FatalError ("xf86OpenConsole: Could not determine TTY name: %s\n",
	  strerror(errno));
      }
      strlcpy (vtdevice, ttn, sizeof(vtdevice));
    } else if (VTnum >= 0) {
      snprintf (vtdevice, sizeof(vtdevice), "/dev/tty%02d", VTnum);
    }

    /*
     * Now we can dispose of stdin/stdout
     */
    fclose (stdin);
    fclose (stdout);

    if ((xf86Info.consoleFd = open(vtdevice, O_RDWR | O_NDELAY, 0)) < 0) {
      FatalError("xf86OpenConsole: Cannot open %s: %s\n", vtdevice,
	strerror(errno));
    }

    /*
     * We make 100% sure we use the correct VT number. This can get ugly
     * where there are multi-consoles in use, so we make sure we query
     * the kernel for the correct VT number. It knows best, we don't.
     */
    vidinf.size = sizeof(vidinf);
    if (ioctl (xf86Info.consoleFd, CONS_GETINFO, &vidinf) < 0) {
      FatalError ("xf86OpenConsole: %s not a console device "
	"or error querying device: %s\n", vtdevice, strerror (errno));
    }
    xf86Info.vtno = vidinf.m_num;
    VTnum = vidinf.m_num + 1; /* 0-based */

    ErrorF("(using VT%02d device %s)\n\n", VTnum, vtdevice);

    /* We activate the console just in case its not the one we are on */
    if (ioctl(xf86Info.consoleFd, VT_ACTIVATE, xf86Info.vtno) != 0) {
        ErrorF("xf86OpenConsole: VT_ACTIVATE failed (%s)\n", strerror(errno));
    }

    /* Disassociate from controling TTY */
    if (!KeepTty) {
      setpgrp();
    }

    /*
     * Now we get the current mode that the console device is in. We will
     * use this later when we close the console device to restore it to
     * that same mode.
     */
    if ((sco_console_mode = ioctl(xf86Info.consoleFd, CONS_GET, 0L)) < 0) {
      FatalError("xf86OpenConsole: CONS_GET failed on console (%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;

    /* NOTE: Using sigaction means we dont have to re-arm the signal */
    sigaction(SIGUSR1, &sigvtsw, NULL);

    VT.mode = VT_PROCESS;
    VT.relsig = SIGUSR1;
    VT.acqsig = SIGUSR1;
    VT.frsig = SIGINT;          /* Not implemented */
    VT.waitv = 0;

    /*
     * The SCO X server tries the following call 5 times. Lets do the same
     * thing. It shouldn't really be required but sometimes things take a
     * while to settle down when switching screens. *helpless shrug* I know
     * its sucks but ...
     */

    ioctl_ret = 0;
    for (i = 0; i < 5; i++) {
      ioctl_ret = ioctl(xf86Info.consoleFd, VT_SETMODE, &VT);
      if (ioctl_ret >= 0)
        break;
      usleep(999999); /* Dont use nap() - it forces linking with -lx */
    }

    if (ioctl_ret < 0) {
      FatalError("xf86OpenConsole: VT_SETMODE failed (%s)\n", strerror(errno));
    }

    /*
     * Convince the console driver we are in graphics mode.
     */
    if (ioctl(xf86Info.consoleFd, KDSETMODE, KD_GRAPHICS) < 0) {
        ErrorF("Failed to set graphics mode (%s)\n", strerror(errno));
    }
  } else { /* serverGeneration != 1 */
    if (ioctl(xf86Info.consoleFd, VT_ACTIVATE, xf86Info.vtno) != 0) {
      ErrorF("xf86OpenConsole: VT_ACTIVATE failed (%s)\n", strerror(errno));
    }
  }
}

/*
 * Restore the console to its previous state. This may cause flicker if
 * the screen was previous in a graphics mode, because we first set it
 * to text mode. This has the advantage of getting the console driver
 * to do a soft reset on the card, which really does help settle the
 * video card down again after coming out of Xfree86.
 */
void
xf86CloseConsole(void)
{
  struct vt_mode VT;
  struct sigaction sigvtsw;

  /* Set text mode (possibly briefly) */
  ioctl(xf86Info.consoleFd, KDSETMODE, KD_TEXT0);

  /* Restore the original mode */
  if (sco_console_mode != -1) {
      ioctl(xf86Info.consoleFd, MODESWITCH | sco_console_mode, 0L);
  }

  ioctl(xf86Info.consoleFd, VT_RELDISP, 1);     /* Release the display */

  sigvtsw.sa_handler = SIG_DFL;
  sigfillset(&sigvtsw.sa_mask);
  sigvtsw.sa_flags = 0;

  sigaction(SIGUSR1, &sigvtsw, NULL);

  VT.mode = VT_AUTO;
  VT.waitv = 0;
  VT.relsig = SIGUSR1;
  VT.acqsig = SIGUSR1;
  VT.frsig  = SIGINT;
  ioctl(xf86Info.consoleFd, VT_SETMODE, &VT); /* Revert to auto handling */

  close(xf86Info.consoleFd); /* We're done with the device */
}

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);
  }

  /*
   * By default, the X server wants to bind itself to CPU 0. This makes
   * sure that the server has full access to the I/O ports at IOPL 3.
   * Some SMP systems have trouble with I/O on CPU's other than 0. If,
   * however, you have a system that is well behaved, you can specify
   * this argument and let the scheduler decide which CPU the server
   * should run on.
   */
  if (!strcmp(argv[i], "-nompxlock")) {
    mpxLock = FALSE;
    return (1);
  }

  /*
   * Specify the VT number to run on (NOT the device).
   */
  if ((argv[i][0] == 'v') && (argv[i][1] == 't')) {
    if (sscanf(argv[i], "vt%2d", &VTnum) == 0) {
      UseMsg();
      VTnum = -1;
      return(0);
    }
    if (VTnum <= 0) {
      UseMsg();
      VTnum = -1;
      return(0);
    }
    return(1);
  }

  /*
   * Use a device the user specifies.
   */
  if (!strcmp(argv[i], "-crt")) {
    if (++i > argc) {
      UseMsg();
      VTnum = -1;
      return(0);
    } else {
      VTnum = -2;
      strlcpy (vtdevice, argv[i], sizeof(vtdevice));
      return(2);
    }
  }
  return(0);
}

void
xf86UseMsg(void)
{
	ErrorF("vtXX                   use the specified VT number\n");
	ErrorF("-crt DEVICE            use the specified VT device\n");
        ErrorF("-nompxlock             dont bind X server to CPU 0\n");
	ErrorF("-keeptty               ");
	ErrorF("don't detach controlling tty (for debugging only)\n");
}