screenblank.c revision 1.1
1 /* $NetBSD: screenblank.c,v 1.1 1995/07/12 04:57:51 thorpej Exp $ */ 2 3 /* 4 * Copyright (c) 1995 Jason R. Thorpe. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed for the NetBSD Project 18 * by Jason R. Thorpe. 19 * 4. The name of the author may not be used to endorse or promote products 20 * derived from this software without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 23 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 24 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 25 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 /* 36 * Screensaver daemon for the Sun 3 and SPARC. 37 */ 38 39 #include <sys/types.h> 40 #include <sys/time.h> 41 #include <sys/stat.h> 42 #include <sys/ioctl.h> 43 #include <sys/queue.h> 44 #include <ctype.h> 45 #include <err.h> 46 #include <errno.h> 47 #include <fcntl.h> 48 #include <limits.h> 49 #include <math.h> 50 #include <paths.h> 51 #include <stdlib.h> 52 #include <stdio.h> 53 #include <string.h> 54 #include <signal.h> 55 #include <unistd.h> 56 57 #include <machine/fbio.h> 58 59 #include "pathnames.h" 60 61 struct dev_stat { 62 LIST_ENTRY(dev_stat) ds_link; /* linked list */ 63 char *ds_path; /* path to device */ 64 int ds_isfb; /* boolean; framebuffer? */ 65 time_t ds_atime; /* time device last accessed */ 66 time_t ds_mtime; /* time device last modified */ 67 }; 68 LIST_HEAD(ds_list, dev_stat) ds_list; 69 70 extern char *__progname; 71 72 static void add_dev __P((char *, int)); 73 static void change_state __P((int)); 74 static void cvt_arg __P((char *, struct timeval *)); 75 static void logpid __P((void)); 76 static void sighandler __P((int, int, struct sigcontext *)); 77 static void usage __P((void)); 78 79 int 80 main(argc, argv) 81 int argc; 82 char **argv; 83 { 84 struct dev_stat *dsp; 85 struct timeval timo_on, timo_off, *tvp; 86 struct sigaction sa; 87 struct stat st; 88 int ch, change, fflag = 0, kflag = 0, mflag = 0, state; 89 90 LIST_INIT(&ds_list); 91 92 /* 93 * Set the default timeouts: 10 minutes on, .25 seconds off. 94 */ 95 timo_on.tv_sec = 600; 96 timo_on.tv_usec = 0; 97 timo_off.tv_sec = 0; 98 timo_off.tv_usec = 250000; 99 100 while ((ch = getopt(argc, argv, "d:e:f:km")) != -1) { 101 switch (ch) { 102 case 'd': 103 cvt_arg(optarg, &timo_on); 104 break; 105 106 case 'e': 107 cvt_arg(optarg, &timo_off); 108 break; 109 110 case 'f': 111 fflag = 1; 112 add_dev(optarg, 1); 113 break; 114 115 case 'k': 116 if (mflag || kflag) 117 usage(); 118 kflag = 1; 119 break; 120 121 case 'm': 122 if (kflag || mflag) 123 usage(); 124 mflag = 1; 125 break; 126 127 default: 128 usage(); 129 } 130 } 131 argc -= optind; 132 if (argc) 133 usage(); 134 135 /* 136 * Add the keyboard, mouse, and default framebuffer devices 137 * as necessary. We _always_ check the console device. 138 */ 139 add_dev(_PATH_CONSOLE, 0); 140 if (!kflag) 141 add_dev(_PATH_KEYBOARD, 0); 142 if (!mflag) 143 add_dev(_PATH_MOUSE, 0); 144 if (!fflag) 145 add_dev(_PATH_FB, 1); 146 147 /* Ensure that the framebuffer is on. */ 148 state = FBVIDEO_ON; 149 change_state(state); 150 tvp = &timo_on; 151 152 /* 153 * Make sure the framebuffer gets turned back on when we're 154 * killed. 155 */ 156 sa.sa_handler = sighandler; 157 sa.sa_mask = 0; 158 sa.sa_flags = SA_NOCLDSTOP; 159 if (sigaction(SIGINT, &sa, NULL) || sigaction(SIGTERM, &sa, NULL) || 160 sigaction(SIGHUP, &sa, NULL)) 161 err(1, "sigaction"); 162 163 /* Detach. */ 164 if (daemon(0, 0)) 165 err(1, "daemon"); 166 logpid(); 167 168 /* Start the state machine. */ 169 for (;;) { 170 change = 0; 171 for (dsp = ds_list.lh_first; dsp != NULL; 172 dsp = dsp->ds_link.le_next) { 173 /* Don't check framebuffers. */ 174 if (dsp->ds_isfb) 175 continue; 176 if (stat(dsp->ds_path, &st) < 0) 177 err(1, "stat: %s", dsp->ds_path); 178 if (st.st_atime > dsp->ds_atime) { 179 change = 1; 180 dsp->ds_atime = st.st_atime; 181 } 182 if (st.st_mtime > dsp->ds_mtime) { 183 change = 1; 184 dsp->ds_mtime = st.st_mtime; 185 } 186 } 187 188 switch (state) { 189 case FBVIDEO_ON: 190 if (!change) { 191 state = FBVIDEO_OFF; 192 change_state(state); 193 tvp = &timo_off; 194 } 195 break; 196 197 case FBVIDEO_OFF: 198 if (change) { 199 state = FBVIDEO_ON; 200 change_state(state); 201 tvp = &timo_on; 202 } 203 break; 204 } 205 206 if (select(0, NULL, NULL, NULL, tvp) < 0) 207 err(1, "select"); 208 } 209 /* NOTREACHED */ 210 } 211 212 static void 213 add_dev(path, isfb) 214 char *path; 215 int isfb; 216 { 217 struct dev_stat *dsp1, *dsp2; 218 219 /* Create the entry... */ 220 dsp1 = malloc(sizeof(struct dev_stat)); 221 if (dsp1 == NULL) 222 errx(1, "can't allocate memory for %s", path); 223 bzero(dsp1, sizeof(struct dev_stat)); 224 dsp1->ds_path = path; 225 dsp1->ds_isfb = isfb; 226 227 /* ...and put it in the list. */ 228 if (ds_list.lh_first == NULL) { 229 LIST_INSERT_HEAD(&ds_list, dsp1, ds_link); 230 } else { 231 for (dsp2 = ds_list.lh_first; dsp2->ds_link.le_next != NULL; 232 dsp2 = dsp2->ds_link.le_next) 233 /* Nothing. */ ; 234 LIST_INSERT_AFTER(dsp2, dsp1, ds_link); 235 } 236 } 237 238 /* ARGSUSED */ 239 static void 240 sighandler(sig, code, context) 241 int sig, code; 242 struct sigcontext *context; 243 { 244 245 /* Kill the pid file and re-enable the framebuffer before exit. */ 246 (void)unlink(_PATH_SCREENBLANKPID); 247 change_state(FBVIDEO_ON); 248 exit(0); 249 } 250 251 static void 252 change_state(state) 253 int state; 254 { 255 struct dev_stat *dsp; 256 int fd; 257 258 for (dsp = ds_list.lh_first; dsp != NULL; dsp = dsp->ds_link.le_next) { 259 /* Don't change the state of non-framebuffers! */ 260 if (dsp->ds_isfb == 0) 261 continue; 262 if ((fd = open(dsp->ds_path, O_RDWR, 0)) < 0) { 263 warn("open: %s", dsp->ds_path); 264 continue; 265 } 266 if (ioctl(fd, FBIOSVIDEO, &state) < 0) 267 warn("ioctl: %s", dsp->ds_path); 268 (void)close(fd); 269 } 270 } 271 272 static void 273 cvt_arg(arg, tvp) 274 char *arg; 275 struct timeval *tvp; 276 { 277 char *cp; 278 double seconds = 0.0, exponent = -1.0; 279 int period = 0; 280 281 for (cp = arg; *cp != '\0'; ++cp) { 282 if (*cp == '.') { 283 if (period) 284 errx(1, "invalid argument: %s", arg); 285 period = 1; 286 continue; 287 } 288 289 if (!isdigit(*cp)) 290 errx(1, "invalid argument: %s", arg); 291 292 if (period) { 293 seconds = seconds + ((*cp - '0') * pow(10.0, exponent)); 294 exponent -= 1.0; 295 } else 296 seconds = (seconds * 10.0) + (*cp - '0'); 297 } 298 299 tvp->tv_sec = (long)seconds; 300 tvp->tv_usec = (long)((seconds - tvp->tv_sec) * 1000000); 301 } 302 303 static void 304 logpid() 305 { 306 FILE *fp; 307 308 if ((fp = fopen(_PATH_SCREENBLANKPID, "w")) != NULL) { 309 fprintf(fp, "%u\n", getpid()); 310 (void)fclose(fp); 311 } 312 } 313 314 static void 315 usage() 316 { 317 318 fprintf(stderr, "usage: %s [-k | -m] [-d timeout] [-e timeout] %s\n", 319 __progname, "[-f framebuffer]"); 320 exit(1); 321 } 322
Indexes created Mon Sep 22 05:09:51 GMT 2025