| 1 | /* |
| 2 | * Copyright © 1999 Keith Packard |
| 3 | * |
| 4 | * Permission to use, copy, modify, distribute, and sell this software and its |
| 5 | * documentation for any purpose is hereby granted without fee, provided that |
| 6 | * the above copyright notice appear in all copies and that both that |
| 7 | * copyright notice and this permission notice appear in supporting |
| 8 | * documentation, and that the name of Keith Packard not be used in |
| 9 | * advertising or publicity pertaining to distribution of the software without |
| 10 | * specific, written prior permission. Keith Packard makes no |
| 11 | * representations about the suitability of this software for any purpose. It |
| 12 | * is provided "as is" without express or implied warranty. |
| 13 | * |
| 14 | * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, |
| 15 | * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO |
| 16 | * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR |
| 17 | * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, |
| 18 | * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
| 19 | * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR |
| 20 | * PERFORMANCE OF THIS SOFTWARE. |
| 21 | */ |
| 22 | |
| 23 | #ifdef HAVE_CONFIG_H |
| 24 | #include <kdrive-config.h> |
| 25 | #endif |
| 26 | #include "kdrive.h" |
| 27 | #include <errno.h> |
| 28 | #include <signal.h> |
| 29 | #include <linux/vt.h> |
| 30 | #include <linux/kd.h> |
| 31 | #include <sys/stat.h> |
| 32 | #include <sys/ioctl.h> |
| 33 | #include <X11/keysym.h> |
| 34 | #include <linux/apm_bios.h> |
| 35 | |
| 36 | #ifdef KDRIVE_MOUSE |
| 37 | extern KdPointerDriver LinuxMouseDriver; |
| 38 | extern KdPointerDriver Ps2MouseDriver; |
| 39 | extern KdPointerDriver MsMouseDriver; |
| 40 | #endif |
| 41 | #ifdef TSLIB |
| 42 | extern KdPointerDriver TsDriver; |
| 43 | #endif |
| 44 | #ifdef KDRIVE_EVDEV |
| 45 | extern KdPointerDriver LinuxEvdevMouseDriver; |
| 46 | extern KdKeyboardDriver LinuxEvdevKeyboardDriver; |
| 47 | #endif |
| 48 | #ifdef KDRIVE_KBD |
| 49 | extern KdKeyboardDriver LinuxKeyboardDriver; |
| 50 | #endif |
| 51 | |
| 52 | static int vtno; |
| 53 | int LinuxConsoleFd; |
| 54 | int LinuxApmFd = -1; |
| 55 | static int activeVT; |
| 56 | static Bool enabled; |
| 57 | |
| 58 | static void |
| 59 | LinuxVTRequest(int sig) |
| 60 | { |
| 61 | kdSwitchPending = TRUE; |
| 62 | } |
| 63 | |
| 64 | /* Check before chowning -- this avoids touching the file system */ |
| 65 | static void |
| 66 | LinuxCheckChown(const char *file) |
| 67 | { |
| 68 | struct stat st; |
| 69 | __uid_t u; |
| 70 | __gid_t g; |
| 71 | |
| 72 | if (stat(file, &st) < 0) |
| 73 | return; |
| 74 | u = getuid(); |
| 75 | g = getgid(); |
| 76 | if (st.st_uid != u || st.st_gid != g) |
| 77 | chown(file, u, g); |
| 78 | } |
| 79 | |
| 80 | static int |
| 81 | LinuxInit(void) |
| 82 | { |
| 83 | int fd = -1; |
| 84 | char vtname[11]; |
| 85 | struct vt_stat vts; |
| 86 | |
| 87 | LinuxConsoleFd = -1; |
| 88 | /* check if we're run with euid==0 */ |
| 89 | if (geteuid() != 0) { |
| 90 | FatalError("LinuxInit: Server must be suid root\n"); |
| 91 | } |
| 92 | |
| 93 | if (kdVirtualTerminal >= 0) |
| 94 | vtno = kdVirtualTerminal; |
| 95 | else { |
| 96 | if ((fd = open("/dev/tty0", O_WRONLY, 0)) < 0) { |
| 97 | FatalError("LinuxInit: Cannot open /dev/tty0 (%s)\n", |
| 98 | strerror(errno)); |
| 99 | } |
| 100 | if ((ioctl(fd, VT_OPENQRY, &vtno) < 0) || (vtno == -1)) { |
| 101 | FatalError("xf86OpenConsole: Cannot find a free VT\n"); |
| 102 | } |
| 103 | close(fd); |
| 104 | } |
| 105 | |
| 106 | snprintf(vtname, sizeof(vtname), "/dev/tty%d", vtno); /* /dev/tty1-64 */ |
| 107 | |
| 108 | if ((LinuxConsoleFd = open(vtname, O_RDWR | O_NDELAY, 0)) < 0) { |
| 109 | FatalError("LinuxInit: Cannot open %s (%s)\n", vtname, strerror(errno)); |
| 110 | } |
| 111 | |
| 112 | /* change ownership of the vt */ |
| 113 | LinuxCheckChown(vtname); |
| 114 | |
| 115 | /* |
| 116 | * the current VT device we're running on is not "console", we want |
| 117 | * to grab all consoles too |
| 118 | * |
| 119 | * Why is this needed? |
| 120 | */ |
| 121 | LinuxCheckChown("/dev/tty0"); |
| 122 | /* |
| 123 | * Linux doesn't switch to an active vt after the last close of a vt, |
| 124 | * so we do this ourselves by remembering which is active now. |
| 125 | */ |
| 126 | memset(&vts, '\0', sizeof(vts)); /* valgrind */ |
| 127 | if (ioctl(LinuxConsoleFd, VT_GETSTATE, &vts) == 0) { |
| 128 | activeVT = vts.v_active; |
| 129 | } |
| 130 | |
| 131 | return 1; |
| 132 | } |
| 133 | |
| 134 | static void |
| 135 | LinuxSetSwitchMode(int mode) |
| 136 | { |
| 137 | struct sigaction act; |
| 138 | struct vt_mode VT; |
| 139 | |
| 140 | if (ioctl(LinuxConsoleFd, VT_GETMODE, &VT) < 0) { |
| 141 | FatalError("LinuxInit: VT_GETMODE failed\n"); |
| 142 | } |
| 143 | |
| 144 | if (mode == VT_PROCESS) { |
| 145 | act.sa_handler = LinuxVTRequest; |
| 146 | sigemptyset(&act.sa_mask); |
| 147 | act.sa_flags = 0; |
| 148 | sigaction(SIGUSR1, &act, 0); |
| 149 | |
| 150 | VT.mode = mode; |
| 151 | VT.relsig = SIGUSR1; |
| 152 | VT.acqsig = SIGUSR1; |
| 153 | } |
| 154 | else { |
| 155 | act.sa_handler = SIG_IGN; |
| 156 | sigemptyset(&act.sa_mask); |
| 157 | act.sa_flags = 0; |
| 158 | sigaction(SIGUSR1, &act, 0); |
| 159 | |
| 160 | VT.mode = mode; |
| 161 | VT.relsig = 0; |
| 162 | VT.acqsig = 0; |
| 163 | } |
| 164 | if (ioctl(LinuxConsoleFd, VT_SETMODE, &VT) < 0) { |
| 165 | FatalError("LinuxInit: VT_SETMODE failed\n"); |
| 166 | } |
| 167 | } |
| 168 | |
| 169 | static void |
| 170 | LinuxApmBlock(pointer blockData, OSTimePtr pTimeout, pointer pReadmask) |
| 171 | { |
| 172 | } |
| 173 | |
| 174 | static Bool LinuxApmRunning; |
| 175 | |
| 176 | static void |
| 177 | LinuxApmWakeup(pointer blockData, int result, pointer pReadmask) |
| 178 | { |
| 179 | fd_set *readmask = (fd_set *) pReadmask; |
| 180 | |
| 181 | if (result > 0 && LinuxApmFd >= 0 && FD_ISSET(LinuxApmFd, readmask)) { |
| 182 | apm_event_t event; |
| 183 | Bool running = LinuxApmRunning; |
| 184 | int cmd = APM_IOC_SUSPEND; |
| 185 | |
| 186 | while (read(LinuxApmFd, &event, sizeof(event)) == sizeof(event)) { |
| 187 | switch (event) { |
| 188 | case APM_SYS_STANDBY: |
| 189 | case APM_USER_STANDBY: |
| 190 | running = FALSE; |
| 191 | cmd = APM_IOC_STANDBY; |
| 192 | break; |
| 193 | case APM_SYS_SUSPEND: |
| 194 | case APM_USER_SUSPEND: |
| 195 | case APM_CRITICAL_SUSPEND: |
| 196 | running = FALSE; |
| 197 | cmd = APM_IOC_SUSPEND; |
| 198 | break; |
| 199 | case APM_NORMAL_RESUME: |
| 200 | case APM_CRITICAL_RESUME: |
| 201 | case APM_STANDBY_RESUME: |
| 202 | running = TRUE; |
| 203 | break; |
| 204 | } |
| 205 | } |
| 206 | if (running && !LinuxApmRunning) { |
| 207 | KdResume(); |
| 208 | LinuxApmRunning = TRUE; |
| 209 | } |
| 210 | else if (!running && LinuxApmRunning) { |
| 211 | KdSuspend(); |
| 212 | LinuxApmRunning = FALSE; |
| 213 | ioctl(LinuxApmFd, cmd, 0); |
| 214 | } |
| 215 | } |
| 216 | } |
| 217 | |
| 218 | #ifdef FNONBLOCK |
| 219 | #define NOBLOCK FNONBLOCK |
| 220 | #else |
| 221 | #define NOBLOCK FNDELAY |
| 222 | #endif |
| 223 | |
| 224 | static void |
| 225 | LinuxEnable(void) |
| 226 | { |
| 227 | if (enabled) |
| 228 | return; |
| 229 | if (kdSwitchPending) { |
| 230 | kdSwitchPending = FALSE; |
| 231 | ioctl(LinuxConsoleFd, VT_RELDISP, VT_ACKACQ); |
| 232 | } |
| 233 | /* |
| 234 | * Open the APM driver |
| 235 | */ |
| 236 | LinuxApmFd = open("/dev/apm_bios", 2); |
| 237 | if (LinuxApmFd < 0 && errno == ENOENT) |
| 238 | LinuxApmFd = open("/dev/misc/apm_bios", 2); |
| 239 | if (LinuxApmFd >= 0) { |
| 240 | LinuxApmRunning = TRUE; |
| 241 | fcntl(LinuxApmFd, F_SETFL, fcntl(LinuxApmFd, F_GETFL) | NOBLOCK); |
| 242 | RegisterBlockAndWakeupHandlers(LinuxApmBlock, LinuxApmWakeup, 0); |
| 243 | AddEnabledDevice(LinuxApmFd); |
| 244 | } |
| 245 | |
| 246 | /* |
| 247 | * now get the VT |
| 248 | */ |
| 249 | LinuxSetSwitchMode(VT_AUTO); |
| 250 | if (ioctl(LinuxConsoleFd, VT_ACTIVATE, vtno) != 0) { |
| 251 | FatalError("LinuxInit: VT_ACTIVATE failed\n"); |
| 252 | } |
| 253 | if (ioctl(LinuxConsoleFd, VT_WAITACTIVE, vtno) != 0) { |
| 254 | FatalError("LinuxInit: VT_WAITACTIVE failed\n"); |
| 255 | } |
| 256 | LinuxSetSwitchMode(VT_PROCESS); |
| 257 | if (ioctl(LinuxConsoleFd, KDSETMODE, KD_GRAPHICS) < 0) { |
| 258 | FatalError("LinuxInit: KDSETMODE KD_GRAPHICS failed\n"); |
| 259 | } |
| 260 | enabled = TRUE; |
| 261 | } |
| 262 | |
| 263 | static void |
| 264 | LinuxDisable(void) |
| 265 | { |
| 266 | ioctl(LinuxConsoleFd, KDSETMODE, KD_TEXT); /* Back to text mode ... */ |
| 267 | if (kdSwitchPending) { |
| 268 | kdSwitchPending = FALSE; |
| 269 | ioctl(LinuxConsoleFd, VT_RELDISP, 1); |
| 270 | } |
| 271 | enabled = FALSE; |
| 272 | if (LinuxApmFd >= 0) { |
| 273 | RemoveBlockAndWakeupHandlers(LinuxApmBlock, LinuxApmWakeup, 0); |
| 274 | RemoveEnabledDevice(LinuxApmFd); |
| 275 | close(LinuxApmFd); |
| 276 | LinuxApmFd = -1; |
| 277 | } |
| 278 | } |
| 279 | |
| 280 | static void |
| 281 | LinuxFini(void) |
| 282 | { |
| 283 | struct vt_mode VT; |
| 284 | struct vt_stat vts; |
| 285 | int fd; |
| 286 | |
| 287 | if (LinuxConsoleFd < 0) |
| 288 | return; |
| 289 | |
| 290 | if (ioctl(LinuxConsoleFd, VT_GETMODE, &VT) != -1) { |
| 291 | VT.mode = VT_AUTO; |
| 292 | ioctl(LinuxConsoleFd, VT_SETMODE, &VT); /* set dflt vt handling */ |
| 293 | } |
| 294 | memset(&vts, '\0', sizeof(vts)); /* valgrind */ |
| 295 | ioctl(LinuxConsoleFd, VT_GETSTATE, &vts); |
| 296 | if (vtno == vts.v_active) { |
| 297 | /* |
| 298 | * Find a legal VT to switch to, either the one we started from |
| 299 | * or the lowest active one that isn't ours |
| 300 | */ |
| 301 | if (activeVT < 0 || |
| 302 | activeVT == vts.v_active || !(vts.v_state & (1 << activeVT))) { |
| 303 | for (activeVT = 1; activeVT < 16; activeVT++) |
| 304 | if (activeVT != vtno && (vts.v_state & (1 << activeVT))) |
| 305 | break; |
| 306 | if (activeVT == 16) |
| 307 | activeVT = -1; |
| 308 | } |
| 309 | /* |
| 310 | * Perform a switch back to the active VT when we were started |
| 311 | */ |
| 312 | if (activeVT >= -1) { |
| 313 | ioctl(LinuxConsoleFd, VT_ACTIVATE, activeVT); |
| 314 | ioctl(LinuxConsoleFd, VT_WAITACTIVE, activeVT); |
| 315 | activeVT = -1; |
| 316 | } |
| 317 | } |
| 318 | close(LinuxConsoleFd); /* make the vt-manager happy */ |
| 319 | LinuxConsoleFd = -1; |
| 320 | fd = open("/dev/tty0", O_RDWR | O_NDELAY, 0); |
| 321 | if (fd >= 0) { |
| 322 | memset(&vts, '\0', sizeof(vts)); /* valgrind */ |
| 323 | ioctl(fd, VT_GETSTATE, &vts); |
| 324 | if (ioctl(fd, VT_DISALLOCATE, vtno) < 0) |
| 325 | fprintf(stderr, "Can't deallocate console %d %s\n", vtno, |
| 326 | strerror(errno)); |
| 327 | close(fd); |
| 328 | } |
| 329 | return; |
| 330 | } |
| 331 | |
| 332 | void |
| 333 | KdOsAddInputDrivers(void) |
| 334 | { |
| 335 | #ifdef KDRIVE_MOUSE |
| 336 | KdAddPointerDriver(&LinuxMouseDriver); |
| 337 | KdAddPointerDriver(&MsMouseDriver); |
| 338 | KdAddPointerDriver(&Ps2MouseDriver); |
| 339 | #endif |
| 340 | #ifdef TSLIB |
| 341 | KdAddPointerDriver(&TsDriver); |
| 342 | #endif |
| 343 | #ifdef KDRIVE_EVDEV |
| 344 | KdAddPointerDriver(&LinuxEvdevMouseDriver); |
| 345 | KdAddKeyboardDriver(&LinuxEvdevKeyboardDriver); |
| 346 | #endif |
| 347 | #ifdef KDRIVE_KBD |
| 348 | KdAddKeyboardDriver(&LinuxKeyboardDriver); |
| 349 | #endif |
| 350 | } |
| 351 | |
| 352 | static void |
| 353 | LinuxBell(int volume, int pitch, int duration) |
| 354 | { |
| 355 | if (volume && pitch) |
| 356 | ioctl(LinuxConsoleFd, KDMKTONE, ((1193190 / pitch) & 0xffff) | |
| 357 | (((unsigned long) duration * volume / 50) << 16)); |
| 358 | } |
| 359 | |
| 360 | KdOsFuncs LinuxFuncs = { |
| 361 | .Init = LinuxInit, |
| 362 | .Enable = LinuxEnable, |
| 363 | .Disable = LinuxDisable, |
| 364 | .Fini = LinuxFini, |
| 365 | .Bell = LinuxBell, |
| 366 | }; |
| 367 | |
| 368 | void |
| 369 | OsVendorInit(void) |
| 370 | { |
| 371 | KdOsInit(&LinuxFuncs); |
| 372 | } |