screenblank.c revision 1.9
1 /* $NetBSD: screenblank.c,v 1.9 1998/12/18 01:15:45 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 1996, 1998 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. 41 */ 42 43 #include <sys/cdefs.h> 44 #ifndef lint 45 __COPYRIGHT( 46 "@(#) Copyright (c) 1996, 1998 \ 47 The NetBSD Foundation, Inc. All rights reserved."); 48 __RCSID("$NetBSD: screenblank.c,v 1.9 1998/12/18 01:15:45 thorpej 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 <unistd.h> 68 69 #include <dev/wscons/wsconsio.h> 70 71 #ifdef HAVE_FBIO 72 #include <machine/fbio.h> 73 #endif 74 75 #include "pathnames.h" 76 77 u_long setvideo = WSDISPLAYIO_SVIDEO; /* "set video" ioctl */ 78 int videoon = WSDISPLAYIO_VIDEO_ON; /* value for "on" */ 79 int videooff = WSDISPLAYIO_VIDEO_OFF; /* value for "off" */ 80 81 struct dev_stat { 82 LIST_ENTRY(dev_stat) ds_link; /* linked list */ 83 const char *ds_path; /* path to device */ 84 int ds_isfb; /* boolean; framebuffer? */ 85 time_t ds_atime; /* time device last accessed */ 86 time_t ds_mtime; /* time device last modified */ 87 }; 88 LIST_HEAD(ds_list, dev_stat) ds_list; 89 90 extern char *__progname; 91 92 int main __P((int, char *[])); 93 static void add_dev __P((const char *, int)); 94 static void change_state __P((int)); 95 static void cvt_arg __P((char *, struct timeval *)); 96 static void logpid __P((void)); 97 static void sighandler __P((int)); 98 static void usage __P((void)); 99 100 int 101 main(argc, argv) 102 int argc; 103 char *argv[]; 104 { 105 struct dev_stat *dsp; 106 struct timeval timo_on, timo_off, *tvp; 107 struct sigaction sa; 108 struct stat st; 109 int ch, change, fflag = 0, kflag = 0, mflag = 0, state; 110 const char *kbd, *mouse, *display; 111 112 LIST_INIT(&ds_list); 113 114 /* 115 * Set the default timeouts: 10 minutes on, .25 seconds off. 116 */ 117 timo_on.tv_sec = 600; 118 timo_on.tv_usec = 0; 119 timo_off.tv_sec = 0; 120 timo_off.tv_usec = 250000; 121 122 while ((ch = getopt(argc, argv, "d:e:f:km")) != -1) { 123 switch (ch) { 124 case 'd': 125 cvt_arg(optarg, &timo_on); 126 break; 127 128 case 'e': 129 cvt_arg(optarg, &timo_off); 130 break; 131 132 case 'f': 133 fflag = 1; 134 add_dev(optarg, 1); 135 break; 136 137 case 'k': 138 if (mflag || kflag) 139 usage(); 140 kflag = 1; 141 break; 142 143 case 'm': 144 if (kflag || mflag) 145 usage(); 146 mflag = 1; 147 break; 148 149 default: 150 usage(); 151 } 152 } 153 argc -= optind; 154 if (argc) 155 usage(); 156 157 /* 158 * Default to WSCONS support. 159 */ 160 kbd = _PATH_WSKBD; 161 mouse = _PATH_WSMOUSE; 162 display = _PATH_WSDISPLAY; 163 164 #ifdef HAVE_FBIO 165 /* 166 * If a display device wasn't specified, check to see which we 167 * have. If we can't open the WSCONS display, fall back to fbio. 168 */ 169 if (!fflag) { 170 int fd; 171 172 if ((fd = open(display, O_RDONLY, 0666)) == -1) 173 setvideo = FBIOSVIDEO; 174 else 175 (void) close(fd); 176 } 177 178 /* 179 * Do this here so that -f ... args above can influence us. 180 */ 181 if (setvideo == FBIOSVIDEO) { 182 videoon = FBVIDEO_ON; 183 videooff = FBVIDEO_OFF; 184 kbd = _PATH_KEYBOARD; 185 mouse = _PATH_MOUSE; 186 display = _PATH_FB; 187 } 188 #endif 189 190 /* 191 * Add the keyboard, mouse, and default framebuffer devices 192 * as necessary. We _always_ check the console device. 193 */ 194 add_dev(_PATH_CONSOLE, 0); 195 if (!kflag) 196 add_dev(kbd, 0); 197 if (!mflag) 198 add_dev(mouse, 0); 199 if (!fflag) 200 add_dev(display, 1); 201 202 /* Ensure that the framebuffer is on. */ 203 state = videoon; 204 change_state(state); 205 tvp = &timo_on; 206 207 /* 208 * Make sure the framebuffer gets turned back on when we're 209 * killed. 210 */ 211 sa.sa_handler = sighandler; 212 sa.sa_flags = SA_NOCLDSTOP; 213 if (sigemptyset(&sa.sa_mask)) 214 err(1, "sigemptyset"); 215 if (sigaction(SIGINT, &sa, NULL) || sigaction(SIGTERM, &sa, NULL) || 216 sigaction(SIGHUP, &sa, NULL)) 217 err(1, "sigaction"); 218 219 /* Detach. */ 220 if (daemon(0, 0)) 221 err(1, "daemon"); 222 logpid(); 223 224 /* Start the state machine. */ 225 for (;;) { 226 change = 0; 227 for (dsp = ds_list.lh_first; dsp != NULL; 228 dsp = dsp->ds_link.le_next) { 229 /* Don't check framebuffers. */ 230 if (dsp->ds_isfb) 231 continue; 232 if (stat(dsp->ds_path, &st) < 0) 233 err(1, "stat: %s", dsp->ds_path); 234 if (st.st_atime > dsp->ds_atime) { 235 change = 1; 236 dsp->ds_atime = st.st_atime; 237 } 238 if (st.st_mtime > dsp->ds_mtime) { 239 change = 1; 240 dsp->ds_mtime = st.st_mtime; 241 } 242 } 243 244 if (state == videoon) { 245 if (!change) { 246 state = videooff; 247 change_state(state); 248 tvp = &timo_off; 249 } 250 } else { 251 if (change) { 252 state = videoon; 253 change_state(state); 254 tvp = &timo_on; 255 } 256 } 257 258 if (select(0, NULL, NULL, NULL, tvp) < 0) 259 err(1, "select"); 260 } 261 /* NOTREACHED */ 262 } 263 264 static void 265 add_dev(path, isfb) 266 const char *path; 267 int isfb; 268 { 269 struct dev_stat *dsp; 270 int fd; 271 272 /* Make sure we can open the device. */ 273 if ((fd = open(path, O_RDWR, 0666)) == -1) 274 err(1, "can't open %s", path); 275 276 #ifdef HAVE_FBIO 277 /* 278 * We default to WSCONS. If this is a frame buffer 279 * device, check to see if it responds to the old 280 * Sun-style fbio ioctls. If so, switch to fbio mode. 281 */ 282 if (isfb && setvideo != FBIOSVIDEO) { 283 int onoff; 284 285 if ((ioctl(fd, FBIOGVIDEO, &onoff)) == 0) 286 setvideo = FBIOSVIDEO; 287 } 288 #endif 289 290 (void) close(fd); 291 292 /* Create the entry... */ 293 dsp = malloc(sizeof(struct dev_stat)); 294 if (dsp == NULL) 295 errx(1, "can't allocate memory for %s", path); 296 memset(dsp, 0, sizeof(struct dev_stat)); 297 dsp->ds_path = path; 298 dsp->ds_isfb = isfb; 299 300 /* ...and put it in the list. */ 301 LIST_INSERT_HEAD(&ds_list, dsp, ds_link); 302 } 303 304 /* ARGSUSED */ 305 static void 306 sighandler(sig) 307 int sig; 308 { 309 310 /* Kill the pid file and re-enable the framebuffer before exit. */ 311 (void)unlink(_PATH_SCREENBLANKPID); 312 change_state(videoon); 313 exit(0); 314 } 315 316 static void 317 change_state(state) 318 int state; 319 { 320 struct dev_stat *dsp; 321 int fd; 322 323 for (dsp = ds_list.lh_first; dsp != NULL; dsp = dsp->ds_link.le_next) { 324 /* Don't change the state of non-framebuffers! */ 325 if (dsp->ds_isfb == 0) 326 continue; 327 if ((fd = open(dsp->ds_path, O_RDWR, 0)) < 0) { 328 warn("open: %s", dsp->ds_path); 329 continue; 330 } 331 if (ioctl(fd, setvideo, &state) < 0) 332 warn("ioctl: %s", dsp->ds_path); 333 (void)close(fd); 334 } 335 } 336 337 static void 338 cvt_arg(arg, tvp) 339 char *arg; 340 struct timeval *tvp; 341 { 342 char *cp; 343 int seconds, microseconds, factor; 344 int period = 0; 345 factor = 1000000; 346 microseconds = 0; 347 seconds = 0; 348 349 for (cp = arg; *cp != '\0'; ++cp) { 350 if (*cp == '.') { 351 if (period) 352 errx(1, "invalid argument: %s", arg); 353 period = 1; 354 continue; 355 } 356 357 if (!isdigit(*cp)) 358 errx(1, "invalid argument: %s", arg); 359 360 if (period) { 361 if (factor > 1) { 362 microseconds = microseconds * 10 + (*cp - '0'); 363 factor /= 10; 364 } 365 } else 366 seconds = (seconds * 10) + (*cp - '0'); 367 } 368 369 tvp->tv_sec = seconds; 370 if (factor > 1) 371 microseconds *= factor; 372 373 tvp->tv_usec = microseconds; 374 } 375 376 static void 377 logpid() 378 { 379 FILE *fp; 380 381 if ((fp = fopen(_PATH_SCREENBLANKPID, "w")) != NULL) { 382 fprintf(fp, "%u\n", getpid()); 383 (void)fclose(fp); 384 } 385 } 386 387 static void 388 usage() 389 { 390 391 fprintf(stderr, "usage: %s [-k | -m] [-d timeout] [-e timeout] %s\n", 392 __progname, "[-f framebuffer]"); 393 exit(1); 394 } 395
Indexes created Wed Sep 24 05:09:52 GMT 2025