1 /*- 2 * Copyright (c) 1989, 1993, 1994 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #ifndef lint 31 static const char copyright[] = 32 "@(#) Copyright (c) 1989, 1993\n\ 33 The Regents of the University of California. All rights reserved.\n"; 34 #endif 35 36 #if 0 37 #ifndef lint 38 static char sccsid[] = "@(#)calendar.c 8.3 (Berkeley) 3/25/94"; 39 #endif 40 #endif 41 42 #include <sys/cdefs.h> 43 __FBSDID("$FreeBSD$"); 44 45 #include <sys/param.h> 46 #include <sys/stat.h> 47 #include <sys/wait.h> 48 #include <ctype.h> 49 #include <err.h> 50 #include <errno.h> 51 #include <langinfo.h> 52 #include <locale.h> 53 #include <pwd.h> 54 #include <stdbool.h> 55 #define _WITH_GETLINE 56 #include <stdio.h> 57 #include <stdlib.h> 58 #include <string.h> 59 #include <stringlist.h> 60 #include <unistd.h> 61 62 #include "pathnames.h" 63 #include "calendar.h" 64 65 enum { 66 T_OK = 0, 67 T_ERR, 68 T_PROCESS, 69 }; 70 71 const char *calendarFile = "calendar"; /* default calendar file */ 72 static const char *calendarHomes[] = {".calendar", _PATH_INCLUDE}; /* HOME */ 73 static const char *calendarNoMail = "nomail";/* don't sent mail if file exist */ 74 75 static char path[MAXPATHLEN]; 76 77 struct fixs neaster, npaskha, ncny, nfullmoon, nnewmoon; 78 struct fixs nmarequinox, nsepequinox, njunsolstice, ndecsolstice; 79 80 static int cal_parse(FILE *in, FILE *out); 81 82 static StringList *definitions = NULL; 83 static struct event *events[MAXCOUNT]; 84 static char *extradata[MAXCOUNT]; 85 86 static void 87 trimlr(char **buf) 88 { 89 char *walk = *buf; 90 91 while (isspace(*walk)) 92 walk++; 93 while (isspace(walk[strlen(walk) -1])) 94 walk[strlen(walk) -1] = '\0'; 95 96 *buf = walk; 97 } 98 99 static FILE * 100 cal_fopen(const char *file) 101 { 102 FILE *fp; 103 char *home = getenv("HOME"); 104 unsigned int i; 105 106 if (home == NULL || *home == '\0') { 107 warnx("Cannot get home directory"); 108 return (NULL); 109 } 110 111 if (chdir(home) != 0) { 112 warnx("Cannot enter home directory"); 113 return (NULL); 114 } 115 116 for (i = 0; i < sizeof(calendarHomes)/sizeof(calendarHomes[0]) ; i++) { 117 if (chdir(calendarHomes[i]) != 0) 118 continue; 119 120 if ((fp = fopen(file, "r")) != NULL) 121 return (fp); 122 } 123 124 warnx("can't open calendar file \"%s\"", file); 125 126 return (NULL); 127 } 128 129 static int 130 token(char *line, FILE *out, bool *skip) 131 { 132 char *walk, c, a; 133 134 if (strncmp(line, "endif", 5) == 0) { 135 *skip = false; 136 return (T_OK); 137 } 138 139 if (*skip) 140 return (T_OK); 141 142 if (strncmp(line, "include", 7) == 0) { 143 walk = line + 7; 144 145 trimlr(&walk); 146 147 if (*walk == '\0') { 148 warnx("Expecting arguments after #include"); 149 return (T_ERR); 150 } 151 152 if (*walk != '<' && *walk != '\"') { 153 warnx("Excecting '<' or '\"' after #include"); 154 return (T_ERR); 155 } 156 157 a = *walk; 158 walk++; 159 c = walk[strlen(walk) - 1]; 160 161 switch(c) { 162 case '>': 163 if (a != '<') { 164 warnx("Unterminated include expecting '\"'"); 165 return (T_ERR); 166 } 167 break; 168 case '\"': 169 if (a != '\"') { 170 warnx("Unterminated include expecting '>'"); 171 return (T_ERR); 172 } 173 break; 174 default: 175 warnx("Unterminated include expecting '%c'", 176 a == '<' ? '>' : '\"' ); 177 return (T_ERR); 178 } 179 walk[strlen(walk) - 1] = '\0'; 180 181 if (cal_parse(cal_fopen(walk), out)) 182 return (T_ERR); 183 184 return (T_OK); 185 } 186 187 if (strncmp(line, "define", 6) == 0) { 188 if (definitions == NULL) 189 definitions = sl_init(); 190 walk = line + 6; 191 trimlr(&walk); 192 193 if (*walk == '\0') { 194 warnx("Expecting arguments after #define"); 195 return (T_ERR); 196 } 197 198 sl_add(definitions, strdup(walk)); 199 return (T_OK); 200 } 201 202 if (strncmp(line, "ifndef", 6) == 0) { 203 walk = line + 6; 204 trimlr(&walk); 205 206 if (*walk == '\0') { 207 warnx("Expecting arguments after #ifndef"); 208 return (T_ERR); 209 } 210 211 if (definitions != NULL && sl_find(definitions, walk) != NULL) 212 *skip = true; 213 214 return (T_OK); 215 } 216 217 return (T_PROCESS); 218 219 } 220 221 #define REPLACE(string, slen, struct_) \ 222 if (strncasecmp(buf, (string), (slen)) == 0 && buf[(slen)]) { \ 223 if (struct_.name != NULL) \ 224 free(struct_.name); \ 225 if ((struct_.name = strdup(buf + (slen))) == NULL) \ 226 errx(1, "cannot allocate memory"); \ 227 struct_.len = strlen(buf + (slen)); \ 228 continue; \ 229 } 230 static int 231 cal_parse(FILE *in, FILE *out) 232 { 233 char *line = NULL; 234 char *buf; 235 size_t linecap = 0; 236 ssize_t linelen; 237 ssize_t l; 238 static int d_first = -1; 239 static int count = 0; 240 int i; 241 int month[MAXCOUNT]; 242 int day[MAXCOUNT]; 243 int year[MAXCOUNT]; 244 bool skip = false; 245 char dbuf[80]; 246 char *pp, p; 247 struct tm tm; 248 int flags; 249 250 /* Unused */ 251 tm.tm_sec = 0; 252 tm.tm_min = 0; 253 tm.tm_hour = 0; 254 tm.tm_wday = 0; 255 256 if (in == NULL) 257 return (1); 258 259 while ((linelen = getline(&line, &linecap, in)) > 0) { 260 if (linelen == 0) 261 continue; 262 263 if (*line == '#') { 264 switch (token(line+1, out, &skip)) { 265 case T_ERR: 266 free(line); 267 return (1); 268 case T_OK: 269 continue; 270 case T_PROCESS: 271 break; 272 default: 273 break; 274 } 275 } 276 277 if (skip) 278 continue; 279 280 buf = line; 281 for (l = linelen; 282 l > 0 && isspace((unsigned char)buf[l - 1]); 283 l--) 284 ; 285 buf[l] = '\0'; 286 if (buf[0] == '\0') 287 continue; 288 289 /* Parse special definitions: LANG, Easter, Paskha etc */ 290 if (strncmp(buf, "LANG=", 5) == 0) { 291 (void)setlocale(LC_ALL, buf + 5); 292 d_first = (*nl_langinfo(D_MD_ORDER) == 'd'); 293 setnnames(); 294 continue; 295 } 296 REPLACE("Easter=", 7, neaster); 297 REPLACE("Paskha=", 7, npaskha); 298 REPLACE("ChineseNewYear=", 15, ncny); 299 REPLACE("NewMoon=", 8, nnewmoon); 300 REPLACE("FullMoon=", 9, nfullmoon); 301 REPLACE("MarEquinox=", 11, nmarequinox); 302 REPLACE("SepEquinox=", 11, nsepequinox); 303 REPLACE("JunSolstice=", 12, njunsolstice); 304 REPLACE("DecSolstice=", 12, ndecsolstice); 305 if (strncmp(buf, "SEQUENCE=", 9) == 0) { 306 setnsequences(buf + 9); 307 continue; 308 } 309 310 /* 311 * If the line starts with a tab, the data has to be 312 * added to the previous line 313 */ 314 if (buf[0] == '\t') { 315 for (i = 0; i < count; i++) 316 event_continue(events[i], buf); 317 continue; 318 } 319 320 /* Get rid of leading spaces (non-standard) */ 321 while (isspace((unsigned char)buf[0])) 322 memcpy(buf, buf + 1, strlen(buf)); 323 324 /* No tab in the line, then not a valid line */ 325 if ((pp = strchr(buf, '\t')) == NULL) 326 continue; 327 328 /* Trim spaces in front of the tab */ 329 while (isspace((unsigned char)pp[-1])) 330 pp--; 331 332 p = *pp; 333 *pp = '\0'; 334 if ((count = parsedaymonth(buf, year, month, day, &flags, 335 extradata)) == 0) 336 continue; 337 *pp = p; 338 if (count < 0) { 339 /* Show error status based on return value */ 340 if (debug) 341 fprintf(stderr, "Ignored: %s\n", buf); 342 if (count == -1) 343 continue; 344 count = -count + 1; 345 } 346 347 /* Find the last tab */ 348 while (pp[1] == '\t') 349 pp++; 350 351 if (d_first < 0) 352 d_first = (*nl_langinfo(D_MD_ORDER) == 'd'); 353 354 for (i = 0; i < count; i++) { 355 tm.tm_mon = month[i] - 1; 356 tm.tm_mday = day[i]; 357 tm.tm_year = year[i] - 1900; 358 (void)strftime(dbuf, sizeof(dbuf), 359 d_first ? "%e %b" : "%b %e", &tm); 360 if (debug) 361 fprintf(stderr, "got %s\n", pp); 362 events[i] = event_add(year[i], month[i], day[i], dbuf, 363 ((flags &= F_VARIABLE) != 0) ? 1 : 0, pp, 364 extradata[i]); 365 } 366 } 367 368 free(line); 369 fclose(in); 370 371 return (0); 372 } 373 374 void 375 cal(void) 376 { 377 FILE *fpin; 378 FILE *fpout; 379 int i; 380 381 for (i = 0; i < MAXCOUNT; i++) 382 extradata[i] = (char *)calloc(1, 20); 383 384 385 if ((fpin = opencalin()) == NULL) 386 return; 387 388 if ((fpout = opencalout()) == NULL) { 389 fclose(fpin); 390 return; 391 } 392 393 if (cal_parse(fpin, fpout)) 394 return; 395 396 event_print_all(fpout); 397 closecal(fpout); 398 } 399 400 FILE * 401 opencalin(void) 402 { 403 struct stat sbuf; 404 FILE *fpin; 405 406 /* open up calendar file */ 407 if ((fpin = fopen(calendarFile, "r")) == NULL) { 408 if (doall) { 409 if (chdir(calendarHomes[0]) != 0) 410 return (NULL); 411 if (stat(calendarNoMail, &sbuf) == 0) 412 return (NULL); 413 if ((fpin = fopen(calendarFile, "r")) == NULL) 414 return (NULL); 415 } else { 416 fpin = cal_fopen(calendarFile); 417 } 418 } 419 return (fpin); 420 } 421 422 FILE * 423 opencalout(void) 424 { 425 int fd; 426 427 /* not reading all calendar files, just set output to stdout */ 428 if (!doall) 429 return (stdout); 430 431 /* set output to a temporary file, so if no output don't send mail */ 432 snprintf(path, sizeof(path), "%s/_calXXXXXX", _PATH_TMP); 433 if ((fd = mkstemp(path)) < 0) 434 return (NULL); 435 return (fdopen(fd, "w+")); 436 } 437 438 void 439 closecal(FILE *fp) 440 { 441 uid_t uid; 442 struct stat sbuf; 443 int nread, pdes[2], status; 444 char buf[1024]; 445 446 if (!doall) 447 return; 448 449 rewind(fp); 450 if (fstat(fileno(fp), &sbuf) || !sbuf.st_size) 451 goto done; 452 if (pipe(pdes) < 0) 453 goto done; 454 switch (fork()) { 455 case -1: /* error */ 456 (void)close(pdes[0]); 457 (void)close(pdes[1]); 458 goto done; 459 case 0: 460 /* child -- set stdin to pipe output */ 461 if (pdes[0] != STDIN_FILENO) { 462 (void)dup2(pdes[0], STDIN_FILENO); 463 (void)close(pdes[0]); 464 } 465 (void)close(pdes[1]); 466 uid = geteuid(); 467 if (setuid(getuid()) < 0) { 468 warnx("setuid failed"); 469 _exit(1); 470 }; 471 if (setgid(getegid()) < 0) { 472 warnx("setgid failed"); 473 _exit(1); 474 } 475 if (setuid(uid) < 0) { 476 warnx("setuid failed"); 477 _exit(1); 478 } 479 execl(_PATH_SENDMAIL, "sendmail", "-i", "-t", "-F", 480 "\"Reminder Service\"", (char *)NULL); 481 warn(_PATH_SENDMAIL); 482 _exit(1); 483 } 484 /* parent -- write to pipe input */ 485 (void)close(pdes[0]); 486 487 write(pdes[1], "From: \"Reminder Service\" <", 26); 488 write(pdes[1], pw->pw_name, strlen(pw->pw_name)); 489 write(pdes[1], ">\nTo: <", 7); 490 write(pdes[1], pw->pw_name, strlen(pw->pw_name)); 491 write(pdes[1], ">\nSubject: ", 11); 492 write(pdes[1], dayname, strlen(dayname)); 493 write(pdes[1], "'s Calendar\nPrecedence: bulk\n\n", 30); 494 495 while ((nread = read(fileno(fp), buf, sizeof(buf))) > 0) 496 (void)write(pdes[1], buf, nread); 497 (void)close(pdes[1]); 498 done: (void)fclose(fp); 499 (void)unlink(path); 500 while (wait(&status) >= 0); 501 } 502