1 /* $NetBSD: screenblank.c,v 1.11 2001/02/19 23:22:47 cgd 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 1.11 2001/02/19 23:22:47 cgd 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 #include <util.h> 69 70 #include <dev/wscons/wsconsio.h> 71 72 #ifdef HAVE_FBIO 73 #include <machine/fbio.h> 74 #endif 75 76 #include "pathnames.h" 77 78 u_long setvideo = WSDISPLAYIO_SVIDEO; /* "set video" ioctl */ 79 int videoon = WSDISPLAYIO_VIDEO_ON; /* value for "on" */ 80 int videooff = WSDISPLAYIO_VIDEO_OFF; /* value for "off" */ 81 82 struct dev_stat { 83 LIST_ENTRY(dev_stat) ds_link; /* linked list */ 84 const char *ds_path; /* path to device */ 85 int ds_isfb; /* boolean; framebuffer? */ 86 time_t ds_atime; /* time device last accessed */ 87 time_t ds_mtime; /* time device last modified */ 88 }; 89 LIST_HEAD(ds_list, dev_stat) ds_list; 90 91 int main __P((int, char *[])); 92 static void add_dev __P((const char *, int)); 93 static void change_state __P((int)); 94 static void cvt_arg __P((char *, struct timeval *)); 95 static void sighandler __P((int)); 96 static void usage __P((void)); 97 98 int 99 main(argc, argv) 100 int argc; 101 char *argv[]; 102 { 103 struct dev_stat *dsp; 104 struct timeval timo_on, timo_off, *tvp; 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_usec = 0; 117 timo_off.tv_sec = 0; 118 timo_off.tv_usec = 250000; 119 120 while ((ch = getopt(argc, argv, "d:e:f: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 'k': 136 if (mflag || kflag) 137 usage(); 138 kflag = 1; 139 break; 140 141 case 'm': 142 if (kflag || mflag) 143 usage(); 144 mflag = 1; 145 break; 146 147 default: 148 usage(); 149 } 150 } 151 argc -= optind; 152 if (argc) 153 usage(); 154 155 /* 156 * Default to WSCONS support. 157 */ 158 kbd = _PATH_WSKBD; 159 mouse = _PATH_WSMOUSE; 160 display = _PATH_WSDISPLAY; 161 162 #ifdef HAVE_FBIO 163 /* 164 * If a display device wasn't specified, check to see which we 165 * have. If we can't open the WSCONS display, fall back to fbio. 166 */ 167 if (!fflag) { 168 int fd; 169 170 if ((fd = open(display, O_RDONLY, 0666)) == -1) 171 setvideo = FBIOSVIDEO; 172 else 173 (void) close(fd); 174 } 175 176 /* 177 * Do this here so that -f ... args above can influence us. 178 */ 179 if (setvideo == FBIOSVIDEO) { 180 videoon = FBVIDEO_ON; 181 videooff = FBVIDEO_OFF; 182 kbd = _PATH_KEYBOARD; 183 mouse = _PATH_MOUSE; 184 display = _PATH_FB; 185 } 186 #endif 187 188 /* 189 * Add the keyboard, mouse, and default framebuffer devices 190 * as necessary. We _always_ check the console device. 191 */ 192 add_dev(_PATH_CONSOLE, 0); 193 if (!kflag) 194 add_dev(kbd, 0); 195 if (!mflag) 196 add_dev(mouse, 0); 197 if (!fflag) 198 add_dev(display, 1); 199 200 /* Ensure that the framebuffer is on. */ 201 state = videoon; 202 change_state(state); 203 tvp = &timo_on; 204 205 /* 206 * Make sure the framebuffer gets turned back on when we're 207 * killed. 208 */ 209 sa.sa_handler = sighandler; 210 sa.sa_flags = SA_NOCLDSTOP; 211 if (sigemptyset(&sa.sa_mask)) 212 err(1, "sigemptyset"); 213 if (sigaction(SIGINT, &sa, NULL) || sigaction(SIGTERM, &sa, NULL) || 214 sigaction(SIGHUP, &sa, NULL)) 215 err(1, "sigaction"); 216 217 /* Detach. */ 218 if (daemon(0, 0)) 219 err(1, "daemon"); 220 pidfile(NULL); 221 222 /* Start the state machine. */ 223 for (;;) { 224 change = 0; 225 for (dsp = ds_list.lh_first; dsp != NULL; 226 dsp = dsp->ds_link.le_next) { 227 /* Don't check framebuffers. */ 228 if (dsp->ds_isfb) 229 continue; 230 if (stat(dsp->ds_path, &st) < 0) 231 err(1, "stat: %s", dsp->ds_path); 232 if (st.st_atime > dsp->ds_atime) { 233 change = 1; 234 dsp->ds_atime = st.st_atime; 235 } 236 if (st.st_mtime > dsp->ds_mtime) { 237 change = 1; 238 dsp->ds_mtime = st.st_mtime; 239 } 240 } 241 242 if (state == videoon) { 243 if (!change) { 244 state = videooff; 245 change_state(state); 246 tvp = &timo_off; 247 } 248 } else { 249 if (change) { 250 state = videoon; 251 change_state(state); 252 tvp = &timo_on; 253 } 254 } 255 256 if (select(0, NULL, NULL, NULL, tvp) < 0) 257 err(1, "select"); 258 } 259 /* NOTREACHED */ 260 } 261 262 static void 263 add_dev(path, isfb) 264 const char *path; 265 int isfb; 266 { 267 struct dev_stat *dsp; 268 int fd; 269 270 /* Make sure we can open the device. */ 271 if ((fd = open(path, O_RDWR, 0666)) == -1) 272 err(1, "can't open %s", path); 273 274 #ifdef HAVE_FBIO 275 /* 276 * We default to WSCONS. If this is a frame buffer 277 * device, check to see if it responds to the old 278 * Sun-style fbio ioctls. If so, switch to fbio mode. 279 */ 280 if (isfb && setvideo != FBIOSVIDEO) { 281 int onoff; 282 283 if ((ioctl(fd, FBIOGVIDEO, &onoff)) == 0) 284 setvideo = FBIOSVIDEO; 285 } 286 #endif 287 288 (void) close(fd); 289 290 /* Create the entry... */ 291 dsp = malloc(sizeof(struct dev_stat)); 292 if (dsp == NULL) 293 errx(1, "can't allocate memory for %s", path); 294 memset(dsp, 0, sizeof(struct dev_stat)); 295 dsp->ds_path = path; 296 dsp->ds_isfb = isfb; 297 298 /* ...and put it in the list. */ 299 LIST_INSERT_HEAD(&ds_list, dsp, ds_link); 300 } 301 302 /* ARGSUSED */ 303 static void 304 sighandler(sig) 305 int sig; 306 { 307 308 /* Kill the pid file and re-enable the framebuffer before exit. */ 309 change_state(videoon); 310 exit(0); 311 } 312 313 static void 314 change_state(state) 315 int state; 316 { 317 struct dev_stat *dsp; 318 int fd; 319 320 for (dsp = ds_list.lh_first; dsp != NULL; dsp = dsp->ds_link.le_next) { 321 /* Don't change the state of non-framebuffers! */ 322 if (dsp->ds_isfb == 0) 323 continue; 324 if ((fd = open(dsp->ds_path, O_RDWR, 0)) < 0) { 325 warn("open: %s", dsp->ds_path); 326 continue; 327 } 328 if (ioctl(fd, setvideo, &state) < 0) 329 warn("ioctl: %s", dsp->ds_path); 330 (void)close(fd); 331 } 332 } 333 334 static void 335 cvt_arg(arg, tvp) 336 char *arg; 337 struct timeval *tvp; 338 { 339 char *cp; 340 int seconds, microseconds, factor; 341 int period = 0; 342 factor = 1000000; 343 microseconds = 0; 344 seconds = 0; 345 346 for (cp = arg; *cp != '\0'; ++cp) { 347 if (*cp == '.') { 348 if (period) 349 errx(1, "invalid argument: %s", arg); 350 period = 1; 351 continue; 352 } 353 354 if (!isdigit(*cp)) 355 errx(1, "invalid argument: %s", arg); 356 357 if (period) { 358 if (factor > 1) { 359 microseconds = microseconds * 10 + (*cp - '0'); 360 factor /= 10; 361 } 362 } else 363 seconds = (seconds * 10) + (*cp - '0'); 364 } 365 366 tvp->tv_sec = seconds; 367 if (factor > 1) 368 microseconds *= factor; 369 370 tvp->tv_usec = microseconds; 371 } 372 373 static void 374 usage() 375 { 376 377 fprintf(stderr, "usage: %s [-k | -m] [-d timeout] [-e timeout] %s\n", 378 getprogname(), "[-f framebuffer]"); 379 exit(1); 380 } 381