screenblank.c revision 1.22
1 /* $NetBSD: screenblank.c,v 1.22 2004/11/25 20:23:36 christos 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 1.22 2004/11/25 20:23:36 christos 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 const char *kbd, *mouse, *display; 109 110 LIST_INIT(&ds_list); 111 112 /* 113 * Set the default timeouts: 10 minutes on, .25 seconds off. 114 */ 115 timo_on.tv_sec = 600; 116 timo_on.tv_nsec = 0; 117 timo_off.tv_sec = 0; 118 timo_off.tv_nsec = 250000000; 119 120 while ((ch = getopt(argc, argv, "d:e:f:i:km")) != -1) { 121 switch (ch) { 122 case 'd': 123 cvt_arg(optarg, &timo_on); 124 break; 125 126 case 'e': 127 cvt_arg(optarg, &timo_off); 128 break; 129 130 case 'f': 131 fflag = 1; 132 add_dev(optarg, 1); 133 break; 134 135 case 'i': 136 add_dev(optarg, 0); 137 break; 138 139 case 'k': 140 if (mflag || kflag) 141 usage(); 142 kflag = 1; 143 break; 144 145 case 'm': 146 if (kflag || mflag) 147 usage(); 148 mflag = 1; 149 break; 150 151 default: 152 usage(); 153 } 154 } 155 argc -= optind; 156 if (argc) 157 usage(); 158 159 /* 160 * Default to WSCONS support. 161 */ 162 kbd = _PATH_WSKBD; 163 mouse = _PATH_WSMOUSE; 164 display = _PATH_WSDISPLAY; 165 166 #ifdef HAVE_FBIO 167 /* 168 * If a display device wasn't specified, check to see which we 169 * have. If we can't open the WSCONS display, fall back to fbio. 170 */ 171 if (!fflag) { 172 int fd; 173 174 if ((fd = open(display, O_RDONLY, 0666)) == -1) 175 setvideo = FBIOSVIDEO; 176 else 177 (void) close(fd); 178 } 179 180 /* 181 * Do this here so that -f ... args above can influence us. 182 */ 183 if (setvideo == FBIOSVIDEO) { 184 videoon = FBVIDEO_ON; 185 videooff = FBVIDEO_OFF; 186 kbd = _PATH_KEYBOARD; 187 mouse = _PATH_MOUSE; 188 display = _PATH_FB; 189 } 190 #endif 191 192 /* 193 * Add the keyboard, mouse, and default framebuffer devices 194 * as necessary. We _always_ check the console device. 195 */ 196 add_dev(_PATH_CONSOLE, 0); 197 if (!kflag) 198 add_dev(kbd, 0); 199 if (!mflag) 200 add_dev(mouse, 0); 201 if (!fflag) 202 add_dev(display, 1); 203 204 /* Ensure that the framebuffer is on. */ 205 state = videoon; 206 change_state(state); 207 tvp = &timo_on; 208 209 /* 210 * Make sure the framebuffer gets turned back on when we're 211 * killed. 212 */ 213 sa.sa_handler = sighandler; 214 sa.sa_flags = SA_NOCLDSTOP; 215 if (sigemptyset(&sa.sa_mask)) 216 err(1, "sigemptyset"); 217 if (sigaction(SIGINT, &sa, NULL) || sigaction(SIGTERM, &sa, NULL) || 218 sigaction(SIGHUP, &sa, NULL)) 219 err(1, "sigaction"); 220 221 openlog("screenblank", LOG_PID, LOG_DAEMON); 222 /* Detach. */ 223 if (daemon(0, 0)) 224 err(1, "daemon"); 225 pidfile(NULL); 226 227 /* Start the state machine. */ 228 for (;;) { 229 change = 0; 230 for (dsp = ds_list.lh_first; dsp != NULL; 231 dsp = dsp->ds_link.le_next) { 232 /* Don't check framebuffers in graphics mode. */ 233 if (is_graphics_fb(dsp)) 234 continue; 235 if (stat(dsp->ds_path, &st) == -1) { 236 syslog(LOG_CRIT, 237 "Can't stat `%s' (%m)", dsp->ds_path); 238 exit(1); 239 } 240 if (st.st_atime > dsp->ds_atime) { 241 change = 1; 242 dsp->ds_atime = st.st_atime; 243 } 244 if (st.st_mtime > dsp->ds_mtime) { 245 change = 1; 246 dsp->ds_mtime = st.st_mtime; 247 } 248 } 249 250 if (state == videoon) { 251 if (!change) { 252 state = videooff; 253 change_state(state); 254 tvp = &timo_off; 255 } 256 } else { 257 if (change) { 258 state = videoon; 259 change_state(state); 260 tvp = &timo_on; 261 } 262 } 263 264 tv = *tvp; 265 if (nanosleep(&tv, NULL) == -1) 266 err(1, "nanosleep"); 267 } 268 /* NOTREACHED */ 269 } 270 271 static void 272 add_dev(const char *path, int isfb) 273 { 274 struct dev_stat *dsp; 275 struct stat sb; 276 277 /* Make sure we can stat the device. */ 278 if (stat(path, &sb) == -1) { 279 warn("Can't stat `%s'", path); 280 return; 281 } 282 283 #ifdef HAVE_FBIO 284 /* 285 * We default to WSCONS. If this is a frame buffer 286 * device, check to see if it responds to the old 287 * Sun-style fbio ioctls. If so, switch to fbio mode. 288 */ 289 if (isfb && setvideo != FBIOSVIDEO) { 290 int onoff, fd; 291 292 if ((fd = open(path, O_RDWR, 0666)) == -1) { 293 warn("Can't open `%s'", path); 294 return; 295 } 296 if ((ioctl(fd, FBIOGVIDEO, &onoff)) == 0) 297 setvideo = FBIOSVIDEO; 298 (void)close(fd); 299 } 300 #endif 301 302 /* Create the entry... */ 303 dsp = malloc(sizeof(struct dev_stat)); 304 if (dsp == NULL) 305 err(1, "Can't allocate memory for `%s'", path); 306 (void)memset(dsp, 0, sizeof(struct dev_stat)); 307 dsp->ds_path = path; 308 dsp->ds_isfb = isfb; 309 310 /* ...and put it in the list. */ 311 LIST_INSERT_HEAD(&ds_list, dsp, ds_link); 312 } 313 314 /* ARGSUSED */ 315 static void 316 sighandler(int sig) 317 { 318 319 /* Kill the pid file and re-enable the framebuffer before exit. */ 320 change_state(videoon); 321 exit(0); 322 } 323 324 /* 325 * Return 1 if we are a framebuffer in graphics mode or a framebuffer 326 * where we cannot tell the mode. Return 0 if we are not a framebuffer 327 * device, or a wscons framebuffer in text mode. 328 */ 329 static int 330 is_graphics_fb(struct dev_stat *dsp) 331 { 332 int fd; 333 int state; 334 335 if (dsp->ds_isfb == 0) 336 return 0; 337 338 /* We can't tell if we are not a wscons device */ 339 if (setvideo != WSDISPLAYIO_SVIDEO) 340 return 1; 341 342 if ((fd = open(dsp->ds_path, O_RDWR, 0)) == -1) { 343 syslog(LOG_WARNING, "Cannot open `%s' (%m)", dsp->ds_path); 344 return 1; 345 } 346 347 if (ioctl(fd, WSDISPLAYIO_GMODE, &state) == -1) { 348 syslog(LOG_WARNING, "Cannot get mode on `%s' (%m)", 349 dsp->ds_path); 350 /* We can't tell, so we say we are mapped */ 351 state = WSDISPLAYIO_MODE_MAPPED; 352 } 353 354 (void)close(fd); 355 356 return state != WSDISPLAYIO_MODE_EMUL; 357 } 358 359 static void 360 change_state(int state) 361 { 362 struct dev_stat *dsp; 363 int fd; 364 int fail = 1; 365 366 for (dsp = ds_list.lh_first; dsp != NULL; dsp = dsp->ds_link.le_next) { 367 /* Don't change the state of non-framebuffers! */ 368 if (dsp->ds_isfb == 0) 369 continue; 370 if ((fd = open(dsp->ds_path, O_RDWR, 0)) == -1) { 371 syslog(LOG_WARNING, "Can't open `%s' (%m)", 372 dsp->ds_path); 373 continue; 374 } 375 if (ioctl(fd, setvideo, &state) == -1) 376 syslog(LOG_WARNING, "Can't set video on `%s' (%m)", 377 dsp->ds_path); 378 else 379 fail = 0; 380 (void)close(fd); 381 } 382 if (fail) { 383 syslog(LOG_CRIT, "No frame buffer devices, exiting\n"); 384 exit(1); 385 } 386 } 387 388 static void 389 cvt_arg(char *arg, struct timespec *tvp) 390 { 391 char *cp; 392 int seconds, nanoseconds, factor; 393 int period = 0; 394 factor = 1000000000; 395 nanoseconds = 0; 396 seconds = 0; 397 398 for (cp = arg; *cp != '\0'; ++cp) { 399 if (*cp == '.') { 400 if (period) 401 errx(1, "Invalid argument: %s", arg); 402 period = 1; 403 continue; 404 } 405 406 if (!isdigit((unsigned char)*cp)) 407 errx(1, "Invalid argument: %s", arg); 408 409 if (period) { 410 if (factor > 1) { 411 nanoseconds = nanoseconds * 10 + (*cp - '0'); 412 factor /= 10; 413 } 414 } else 415 seconds = (seconds * 10) + (*cp - '0'); 416 } 417 418 tvp->tv_sec = seconds; 419 if (factor > 1) 420 nanoseconds *= factor; 421 422 tvp->tv_nsec = nanoseconds; 423 } 424 425 static void 426 usage(void) 427 { 428 429 (void)fprintf(stderr, 430 "usage: %s [-k | -m] [-d inactivity-timeout] [-e wakeup-delay]\n" 431 "\t\t[-f framebuffer] [-i input-device]\n", 432 getprogname()); 433 exit(1); 434 } 435
Indexes created Wed Sep 24 22:09:59 GMT 2025