screenblank.c revision 1.24
1 /* $NetBSD: screenblank.c,v 1.24 2006/09/23 20:12:15 elad Exp $ */ 2 3 /*- 4 * Copyright (c) 1996-2002 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /* 40 * Screensaver daemon for the Sun 3 and SPARC, and platforms using WSCONS. 41 */ 42 43 #include <sys/cdefs.h> 44 #ifndef lint 45 __COPYRIGHT( 46 "@(#) Copyright (c) 1996-2002 \ 47 The NetBSD Foundation, Inc. All rights reserved."); 48 __RCSID("$NetBSD: screenblank.c,v 1.24 2006/09/23 20:12:15 elad Exp $"); 49 #endif 50 51 #include <sys/types.h> 52 #include <sys/time.h> 53 #include <sys/stat.h> 54 #include <sys/ioctl.h> 55 #include <sys/queue.h> 56 #include <ctype.h> 57 #include <err.h> 58 #include <errno.h> 59 #include <fcntl.h> 60 #include <limits.h> 61 #include <math.h> 62 #include <paths.h> 63 #include <stdlib.h> 64 #include <stdio.h> 65 #include <string.h> 66 #include <signal.h> 67 #include <syslog.h> 68 #include <unistd.h> 69 #include <util.h> 70 71 #include <dev/wscons/wsconsio.h> 72 73 #ifdef HAVE_FBIO 74 #include <dev/sun/fbio.h> 75 #endif 76 77 #include "pathnames.h" 78 79 u_long setvideo = WSDISPLAYIO_SVIDEO; /* "set video" ioctl */ 80 int videoon = WSDISPLAYIO_VIDEO_ON; /* value for "on" */ 81 int videooff = WSDISPLAYIO_VIDEO_OFF; /* value for "off" */ 82 83 struct dev_stat { 84 LIST_ENTRY(dev_stat) ds_link; /* linked list */ 85 const char *ds_path; /* path to device */ 86 int ds_isfb; /* boolean; framebuffer? */ 87 time_t ds_atime; /* time device last accessed */ 88 time_t ds_mtime; /* time device last modified */ 89 }; 90 LIST_HEAD(ds_list, dev_stat) ds_list; 91 92 int main(int, char *[]); 93 static void add_dev(const char *, int); 94 static void change_state(int); 95 static void cvt_arg(char *, struct timespec *); 96 static void sighandler(int); 97 static int is_graphics_fb(struct dev_stat *); 98 static void usage(void); 99 100 int 101 main(int argc, char *argv[]) 102 { 103 struct dev_stat *dsp; 104 struct timespec timo_on, timo_off, *tvp, tv; 105 struct sigaction sa; 106 struct stat st; 107 int ch, change, fflag = 0, kflag = 0, mflag = 0, state; 108 int bflag = 0, uflag = 0; 109 const char *kbd, *mouse, *display; 110 111 LIST_INIT(&ds_list); 112 113 /* 114 * Set the default timeouts: 10 minutes on, .25 seconds off. 115 */ 116 timo_on.tv_sec = 600; 117 timo_on.tv_nsec = 0; 118 timo_off.tv_sec = 0; 119 timo_off.tv_nsec = 250000000; 120 121 while ((ch = getopt(argc, argv, "bd:e:f:i:kmu")) != -1) { 122 switch (ch) { 123 case 'b': 124 bflag = 1; 125 uflag = 0; 126 break; 127 128 case 'd': 129 cvt_arg(optarg, &timo_on); 130 break; 131 132 case 'e': 133 cvt_arg(optarg, &timo_off); 134 break; 135 136 case 'f': 137 fflag = 1; 138 add_dev(optarg, 1); 139 break; 140 141 case 'i': 142 add_dev(optarg, 0); 143 break; 144 145 case 'k': 146 if (mflag || kflag) 147 usage(); 148 kflag = 1; 149 break; 150 151 case 'm': 152 if (kflag || mflag) 153 usage(); 154 mflag = 1; 155 break; 156 157 case 'u': 158 uflag = 1; 159 bflag = 0; 160 break; 161 162 default: 163 usage(); 164 } 165 } 166 argc -= optind; 167 if (argc) 168 usage(); 169 170 /* 171 * Default to WSCONS support. 172 */ 173 kbd = _PATH_WSKBD; 174 mouse = _PATH_WSMOUSE; 175 display = _PATH_WSDISPLAY; 176 177 #ifdef HAVE_FBIO 178 /* 179 * If a display device wasn't specified, check to see which we 180 * have. If we can't open the WSCONS display, fall back to fbio. 181 */ 182 if (!fflag) { 183 int fd; 184 185 if ((fd = open(display, O_RDONLY, 0666)) == -1) 186 setvideo = FBIOSVIDEO; 187 else 188 (void) close(fd); 189 } 190 191 /* 192 * Do this here so that -f ... args above can influence us. 193 */ 194 if (setvideo == FBIOSVIDEO) { 195 videoon = FBVIDEO_ON; 196 videooff = FBVIDEO_OFF; 197 kbd = _PATH_KEYBOARD; 198 mouse = _PATH_MOUSE; 199 display = _PATH_FB; 200 } 201 #endif 202 203 /* 204 * Handle -b and -u modes. 205 */ 206 if (bflag || uflag) { 207 change_state(bflag ? videooff : videoon); 208 exit(0); 209 } 210 211 /* 212 * Add the keyboard, mouse, and default framebuffer devices 213 * as necessary. We _always_ check the console device. 214 */ 215 add_dev(_PATH_CONSOLE, 0); 216 if (!kflag) 217 add_dev(kbd, 0); 218 if (!mflag) 219 add_dev(mouse, 0); 220 if (!fflag) 221 add_dev(display, 1); 222 223 /* Ensure that the framebuffer is on. */ 224 state = videoon; 225 change_state(state); 226 tvp = &timo_on; 227 228 /* 229 * Make sure the framebuffer gets turned back on when we're 230 * killed. 231 */ 232 sa.sa_handler = sighandler; 233 sa.sa_flags = SA_NOCLDSTOP; 234 if (sigemptyset(&sa.sa_mask)) 235 err(1, "sigemptyset"); 236 if (sigaction(SIGINT, &sa, NULL) || sigaction(SIGTERM, &sa, NULL) || 237 sigaction(SIGHUP, &sa, NULL)) 238 err(1, "sigaction"); 239 240 openlog("screenblank", LOG_PID, LOG_DAEMON); 241 /* Detach. */ 242 if (daemon(0, 0)) 243 err(1, "daemon"); 244 pidfile(NULL); 245 246 /* Start the state machine. */ 247 for (;;) { 248 change = 0; 249 LIST_FOREACH(dsp, &ds_list, ds_link) { 250 /* Don't check framebuffers in graphics mode. */ 251 if (is_graphics_fb(dsp)) 252 continue; 253 if (stat(dsp->ds_path, &st) == -1) { 254 syslog(LOG_CRIT, 255 "Can't stat `%s' (%m)", dsp->ds_path); 256 exit(1); 257 } 258 if (st.st_atime > dsp->ds_atime) { 259 change = 1; 260 dsp->ds_atime = st.st_atime; 261 } 262 if (st.st_mtime > dsp->ds_mtime) { 263 change = 1; 264 dsp->ds_mtime = st.st_mtime; 265 } 266 } 267 268 if (state == videoon) { 269 if (!change) { 270 state = videooff; 271 change_state(state); 272 tvp = &timo_off; 273 } 274 } else { 275 if (change) { 276 state = videoon; 277 change_state(state); 278 tvp = &timo_on; 279 } 280 } 281 282 tv = *tvp; 283 if (nanosleep(&tv, NULL) == -1) 284 err(1, "nanosleep"); 285 } 286 /* NOTREACHED */ 287 } 288 289 static void 290 add_dev(const char *path, int isfb) 291 { 292 struct dev_stat *dsp; 293 struct stat sb; 294 295 /* Make sure we can stat the device. */ 296 if (stat(path, &sb) == -1) { 297 warn("Can't stat `%s'", path); 298 return; 299 } 300 301 #ifdef HAVE_FBIO 302 /* 303 * We default to WSCONS. If this is a frame buffer 304 * device, check to see if it responds to the old 305 * Sun-style fbio ioctls. If so, switch to fbio mode. 306 */ 307 if (isfb && setvideo != FBIOSVIDEO) { 308 int onoff, fd; 309 310 if ((fd = open(path, O_RDWR, 0666)) == -1) { 311 warn("Can't open `%s'", path); 312 return; 313 } 314 if ((ioctl(fd, FBIOGVIDEO, &onoff)) == 0) 315 setvideo = FBIOSVIDEO; 316 (void)close(fd); 317 } 318 #endif 319 320 /* Create the entry... */ 321 dsp = malloc(sizeof(struct dev_stat)); 322 if (dsp == NULL) 323 err(1, "Can't allocate memory for `%s'", path); 324 (void)memset(dsp, 0, sizeof(struct dev_stat)); 325 dsp->ds_path = path; 326 dsp->ds_isfb = isfb; 327 328 /* ...and put it in the list. */ 329 LIST_INSERT_HEAD(&ds_list, dsp, ds_link); 330 } 331 332 /* ARGSUSED */ 333 static void 334 sighandler(int sig) 335 { 336 337 /* Kill the pid file and re-enable the framebuffer before exit. */ 338 change_state(videoon); 339 exit(0); 340 } 341 342 /* 343 * Return 1 if we are a framebuffer in graphics mode or a framebuffer 344 * where we cannot tell the mode. Return 0 if we are not a framebuffer 345 * device, or a wscons framebuffer in text mode. 346 */ 347 static int 348 is_graphics_fb(struct dev_stat *dsp) 349 { 350 int fd; 351 int state; 352 353 if (dsp->ds_isfb == 0) 354 return 0; 355 356 /* We can't tell if we are not a wscons device */ 357 if (setvideo != WSDISPLAYIO_SVIDEO) 358 return 1; 359 360 if ((fd = open(dsp->ds_path, O_RDWR, 0)) == -1) { 361 syslog(LOG_WARNING, "Cannot open `%s' (%m)", dsp->ds_path); 362 return 1; 363 } 364 365 if (ioctl(fd, WSDISPLAYIO_GMODE, &state) == -1) { 366 syslog(LOG_WARNING, "Cannot get mode on `%s' (%m)", 367 dsp->ds_path); 368 /* We can't tell, so we say we are mapped */ 369 state = WSDISPLAYIO_MODE_MAPPED; 370 } 371 372 (void)close(fd); 373 374 return state != WSDISPLAYIO_MODE_EMUL; 375 } 376 377 static void 378 change_state(int state) 379 { 380 struct dev_stat *dsp; 381 int fd; 382 int fail = 1; 383 384 LIST_FOREACH(dsp, &ds_list, ds_link) { 385 /* Don't change the state of non-framebuffers! */ 386 if (dsp->ds_isfb == 0) 387 continue; 388 if ((fd = open(dsp->ds_path, O_RDWR, 0)) == -1) { 389 syslog(LOG_WARNING, "Can't open `%s' (%m)", 390 dsp->ds_path); 391 continue; 392 } 393 if (ioctl(fd, setvideo, &state) == -1) 394 syslog(LOG_WARNING, "Can't set video on `%s' (%m)", 395 dsp->ds_path); 396 else 397 fail = 0; 398 (void)close(fd); 399 } 400 if (fail) { 401 syslog(LOG_CRIT, "No frame buffer devices, exiting\n"); 402 exit(1); 403 } 404 } 405 406 static void 407 cvt_arg(char *arg, struct timespec *tvp) 408 { 409 char *cp; 410 int seconds, nanoseconds, factor; 411 int period = 0; 412 factor = 1000000000; 413 nanoseconds = 0; 414 seconds = 0; 415 416 for (cp = arg; *cp != '\0'; ++cp) { 417 if (*cp == '.') { 418 if (period) 419 errx(1, "Invalid argument: %s", arg); 420 period = 1; 421 continue; 422 } 423 424 if (!isdigit((unsigned char)*cp)) 425 errx(1, "Invalid argument: %s", arg); 426 427 if (period) { 428 if (factor > 1) { 429 nanoseconds = nanoseconds * 10 + (*cp - '0'); 430 factor /= 10; 431 } 432 } else 433 seconds = (seconds * 10) + (*cp - '0'); 434 } 435 436 tvp->tv_sec = seconds; 437 if (factor > 1) 438 nanoseconds *= factor; 439 440 tvp->tv_nsec = nanoseconds; 441 } 442 443 static void 444 usage(void) 445 { 446 447 (void)fprintf(stderr, 448 "usage: %s [-k | -m] [-d inactivity-timeout] [-e wakeup-delay]\n" 449 "\t\t[-f framebuffer] [-i input-device]\n", 450 getprogname()); 451 exit(1); 452 } 453
Indexes created Mon Sep 22 13:09:51 GMT 2025