1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1989, 1993, 1994 5 * The Regents of the University of California. 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. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 #ifndef lint 33 static const char copyright[] = 34 "@(#) Copyright (c) 1989, 1993\n\ 35 The Regents of the University of California. All rights reserved.\n"; 36 #endif 37 38 #if 0 39 #ifndef lint 40 static char sccsid[] = "@(#)calendar.c 8.3 (Berkeley) 3/25/94"; 41 #endif 42 #endif 43 44 #include <sys/cdefs.h> 45 __FBSDID("$FreeBSD$"); 46 47 #include <sys/param.h> 48 #include <sys/stat.h> 49 #include <sys/wait.h> 50 #include <ctype.h> 51 #include <err.h> 52 #include <errno.h> 53 #include <langinfo.h> 54 #include <locale.h> 55 #include <pwd.h> 56 #include <stdbool.h> 57 #include <stdio.h> 58 #include <stdlib.h> 59 #include <string.h> 60 #include <stringlist.h> 61 #include <time.h> 62 #include <unistd.h> 63 64 #include "pathnames.h" 65 #include "calendar.h" 66 67 enum { 68 T_OK = 0, 69 T_ERR, 70 T_PROCESS, 71 }; 72 73 const char *calendarFile = "calendar"; /* default calendar file */ 74 static const char *calendarHomes[] = {".calendar", _PATH_INCLUDE_LOCAL, _PATH_INCLUDE}; /* HOME */ 75 static const char *calendarNoMail = "nomail";/* don't sent mail if file exist */ 76 77 static char path[MAXPATHLEN]; 78 79 struct fixs neaster, npaskha, ncny, nfullmoon, nnewmoon; 80 struct fixs nmarequinox, nsepequinox, njunsolstice, ndecsolstice; 81 82 static int cal_parse(FILE *in, FILE *out); 83 84 static StringList *definitions = NULL; 85 static struct event *events[MAXCOUNT]; 86 static char *extradata[MAXCOUNT]; 87 88 static void 89 trimlr(char **buf) 90 { 91 char *walk = *buf; 92 char *last; 93 94 while (isspace(*walk)) 95 walk++; 96 if (*walk != '\0') { 97 last = walk + strlen(walk) - 1; 98 while (last > walk && isspace(*last)) 99 last--; 100 *(last+1) = 0; 101 } 102 103 *buf = walk; 104 } 105 106 static FILE * 107 cal_fopen(const char *file) 108 { 109 FILE *fp; 110 char *home = getenv("HOME"); 111 unsigned int i; 112 struct stat sb; 113 static bool warned = false; 114 115 if (home == NULL || *home == '\0') { 116 warnx("Cannot get home directory"); 117 return (NULL); 118 } 119 120 if (chdir(home) != 0) { 121 warnx("Cannot enter home directory"); 122 return (NULL); 123 } 124 125 for (i = 0; i < nitems(calendarHomes); i++) { 126 if (chdir(calendarHomes[i]) != 0) 127 continue; 128 129 if ((fp = fopen(file, "r")) != NULL) 130 return (fp); 131 } 132 133 warnx("can't open calendar file \"%s\"", file); 134 if (!warned && stat(_PATH_INCLUDE_LOCAL, &sb) != 0) { 135 warnx("calendar data files now provided by calendar-data pkg."); 136 warned = true; 137 } 138 139 return (NULL); 140 } 141 142 static int 143 token(char *line, FILE *out, int *skip) 144 { 145 char *walk, c, a; 146 147 if (strncmp(line, "endif", 5) == 0) { 148 if (*skip > 0) 149 --*skip; 150 return (T_OK); 151 } 152 153 if (strncmp(line, "ifdef", 5) == 0) { 154 walk = line + 5; 155 trimlr(&walk); 156 157 if (*walk == '\0') { 158 warnx("Expecting arguments after #ifdef"); 159 return (T_ERR); 160 } 161 162 if (*skip != 0 || definitions == NULL || sl_find(definitions, walk) == NULL) 163 ++*skip; 164 165 return (T_OK); 166 } 167 168 if (strncmp(line, "ifndef", 6) == 0) { 169 walk = line + 6; 170 trimlr(&walk); 171 172 if (*walk == '\0') { 173 warnx("Expecting arguments after #ifndef"); 174 return (T_ERR); 175 } 176 177 if (*skip != 0 || (definitions != NULL && sl_find(definitions, walk) != NULL)) 178 ++*skip; 179 180 return (T_OK); 181 } 182 183 if (strncmp(line, "else", 4) == 0) { 184 walk = line + 4; 185 trimlr(&walk); 186 187 if (*walk != '\0') { 188 warnx("Expecting no arguments after #else"); 189 return (T_ERR); 190 } 191 192 if (*skip == 0) 193 *skip = 1; 194 else if (*skip == 1) 195 *skip = 0; 196 197 return (T_OK); 198 } 199 200 if (*skip != 0) 201 return (T_OK); 202 203 if (strncmp(line, "include", 7) == 0) { 204 walk = line + 7; 205 206 trimlr(&walk); 207 208 if (*walk == '\0') { 209 warnx("Expecting arguments after #include"); 210 return (T_ERR); 211 } 212 213 if (*walk != '<' && *walk != '\"') { 214 warnx("Excecting '<' or '\"' after #include"); 215 return (T_ERR); 216 } 217 218 a = *walk == '<' ? '>' : '\"'; 219 walk++; 220 c = walk[strlen(walk) - 1]; 221 222 if (a != c) { 223 warnx("Unterminated include expecting '%c'", a); 224 return (T_ERR); 225 } 226 walk[strlen(walk) - 1] = '\0'; 227 228 if (cal_parse(cal_fopen(walk), out)) 229 return (T_ERR); 230 231 return (T_OK); 232 } 233 234 if (strncmp(line, "define", 6) == 0) { 235 if (definitions == NULL) 236 definitions = sl_init(); 237 walk = line + 6; 238 trimlr(&walk); 239 240 if (*walk == '\0') { 241 warnx("Expecting arguments after #define"); 242 return (T_ERR); 243 } 244 245 sl_add(definitions, strdup(walk)); 246 return (T_OK); 247 } 248 249 return (T_PROCESS); 250 251 } 252 253 #define REPLACE(string, slen, struct_) \ 254 if (strncasecmp(buf, (string), (slen)) == 0 && buf[(slen)]) { \ 255 if (struct_.name != NULL) \ 256 free(struct_.name); \ 257 if ((struct_.name = strdup(buf + (slen))) == NULL) \ 258 errx(1, "cannot allocate memory"); \ 259 struct_.len = strlen(buf + (slen)); \ 260 continue; \ 261 } 262 static int 263 cal_parse(FILE *in, FILE *out) 264 { 265 char *line = NULL; 266 char *buf; 267 size_t linecap = 0; 268 ssize_t linelen; 269 ssize_t l; 270 static int d_first = -1; 271 static int count = 0; 272 int i; 273 int month[MAXCOUNT]; 274 int day[MAXCOUNT]; 275 int year[MAXCOUNT]; 276 int skip = 0; 277 char dbuf[80]; 278 char *pp, p; 279 struct tm tm; 280 int flags; 281 char *c, *cc; 282 bool incomment = false; 283 284 /* Unused */ 285 tm.tm_sec = 0; 286 tm.tm_min = 0; 287 tm.tm_hour = 0; 288 tm.tm_wday = 0; 289 290 if (in == NULL) 291 return (1); 292 293 while ((linelen = getline(&line, &linecap, in)) > 0) { 294 buf = line; 295 if (buf[linelen - 1] == '\n') 296 buf[--linelen] = '\0'; 297 298 if (incomment) { 299 c = strstr(buf, "*/"); 300 if (c) { 301 c += 2; 302 linelen -= c - buf; 303 buf = c; 304 incomment = false; 305 } else { 306 continue; 307 } 308 } 309 if (!incomment) { 310 do { 311 c = strstr(buf, "//"); 312 cc = strstr(buf, "/*"); 313 if (c != NULL && (cc == NULL || c - cc < 0)) { 314 *c = '\0'; 315 linelen = c - buf; 316 break; 317 } else if (cc != NULL) { 318 c = strstr(cc + 2, "*/"); 319 if (c != NULL) { 320 c += 2; 321 memmove(cc, c, c - buf + linelen); 322 linelen -= c - cc; 323 } else { 324 *cc = '\0'; 325 linelen = cc - buf; 326 incomment = true; 327 break; 328 } 329 } 330 } while (c != NULL || cc != NULL); 331 } 332 333 for (l = linelen; 334 l > 0 && isspace((unsigned char)buf[l - 1]); 335 l--) 336 ; 337 buf[l] = '\0'; 338 if (buf[0] == '\0') 339 continue; 340 341 if (buf == line && *buf == '#') { 342 switch (token(buf+1, out, &skip)) { 343 case T_ERR: 344 free(line); 345 return (1); 346 case T_OK: 347 continue; 348 case T_PROCESS: 349 break; 350 default: 351 break; 352 } 353 } 354 355 if (skip != 0) 356 continue; 357 358 /* 359 * Setting LANG in user's calendar was an old workaround 360 * for 'calendar -a' being run with C locale to properly 361 * print user's calendars in their native languages. 362 * Now that 'calendar -a' does fork with setusercontext(), 363 * and does not run iconv(), this variable has little use. 364 */ 365 if (strncmp(buf, "LANG=", 5) == 0) { 366 (void)setlocale(LC_ALL, buf + 5); 367 d_first = (*nl_langinfo(D_MD_ORDER) == 'd'); 368 #ifdef WITH_ICONV 369 if (!doall) 370 set_new_encoding(); 371 #endif 372 setnnames(); 373 continue; 374 } 375 /* Parse special definitions: Easter, Paskha etc */ 376 REPLACE("Easter=", 7, neaster); 377 REPLACE("Paskha=", 7, npaskha); 378 REPLACE("ChineseNewYear=", 15, ncny); 379 REPLACE("NewMoon=", 8, nnewmoon); 380 REPLACE("FullMoon=", 9, nfullmoon); 381 REPLACE("MarEquinox=", 11, nmarequinox); 382 REPLACE("SepEquinox=", 11, nsepequinox); 383 REPLACE("JunSolstice=", 12, njunsolstice); 384 REPLACE("DecSolstice=", 12, ndecsolstice); 385 if (strncmp(buf, "SEQUENCE=", 9) == 0) { 386 setnsequences(buf + 9); 387 continue; 388 } 389 390 /* 391 * If the line starts with a tab, the data has to be 392 * added to the previous line 393 */ 394 if (buf[0] == '\t') { 395 for (i = 0; i < count; i++) 396 event_continue(events[i], buf); 397 continue; 398 } 399 400 /* Get rid of leading spaces (non-standard) */ 401 while (isspace((unsigned char)buf[0])) 402 memcpy(buf, buf + 1, strlen(buf)); 403 404 /* No tab in the line, then not a valid line */ 405 if ((pp = strchr(buf, '\t')) == NULL) 406 continue; 407 408 /* Trim spaces in front of the tab */ 409 while (isspace((unsigned char)pp[-1])) 410 pp--; 411 412 p = *pp; 413 *pp = '\0'; 414 if ((count = parsedaymonth(buf, year, month, day, &flags, 415 extradata)) == 0) 416 continue; 417 *pp = p; 418 if (count < 0) { 419 /* Show error status based on return value */ 420 if (debug) 421 fprintf(stderr, "Ignored: %s\n", buf); 422 if (count == -1) 423 continue; 424 count = -count + 1; 425 } 426 427 /* Find the last tab */ 428 while (pp[1] == '\t') 429 pp++; 430 431 if (d_first < 0) 432 d_first = (*nl_langinfo(D_MD_ORDER) == 'd'); 433 434 for (i = 0; i < count; i++) { 435 tm.tm_mon = month[i] - 1; 436 tm.tm_mday = day[i]; 437 tm.tm_year = year[i] - 1900; 438 (void)strftime(dbuf, sizeof(dbuf), 439 d_first ? "%e %b" : "%b %e", &tm); 440 if (debug) 441 fprintf(stderr, "got %s\n", pp); 442 events[i] = event_add(year[i], month[i], day[i], dbuf, 443 ((flags &= F_VARIABLE) != 0) ? 1 : 0, pp, 444 extradata[i]); 445 } 446 } 447 448 free(line); 449 fclose(in); 450 451 return (0); 452 } 453 454 void 455 cal(void) 456 { 457 FILE *fpin; 458 FILE *fpout; 459 int i; 460 461 for (i = 0; i < MAXCOUNT; i++) 462 extradata[i] = (char *)calloc(1, 20); 463 464 465 if ((fpin = opencalin()) == NULL) 466 return; 467 468 if ((fpout = opencalout()) == NULL) { 469 fclose(fpin); 470 return; 471 } 472 473 if (cal_parse(fpin, fpout)) 474 return; 475 476 event_print_all(fpout); 477 closecal(fpout); 478 } 479 480 FILE * 481 opencalin(void) 482 { 483 struct stat sbuf; 484 FILE *fpin; 485 486 /* open up calendar file */ 487 if ((fpin = fopen(calendarFile, "r")) == NULL) { 488 if (doall) { 489 if (chdir(calendarHomes[0]) != 0) 490 return (NULL); 491 if (stat(calendarNoMail, &sbuf) == 0) 492 return (NULL); 493 if ((fpin = fopen(calendarFile, "r")) == NULL) 494 return (NULL); 495 } else { 496 fpin = cal_fopen(calendarFile); 497 } 498 } 499 return (fpin); 500 } 501 502 FILE * 503 opencalout(void) 504 { 505 int fd; 506 507 /* not reading all calendar files, just set output to stdout */ 508 if (!doall) 509 return (stdout); 510 511 /* set output to a temporary file, so if no output don't send mail */ 512 snprintf(path, sizeof(path), "%s/_calXXXXXX", _PATH_TMP); 513 if ((fd = mkstemp(path)) < 0) 514 return (NULL); 515 return (fdopen(fd, "w+")); 516 } 517 518 void 519 closecal(FILE *fp) 520 { 521 struct stat sbuf; 522 int nread, pdes[2], status; 523 char buf[1024]; 524 525 if (!doall) 526 return; 527 528 rewind(fp); 529 if (fstat(fileno(fp), &sbuf) || !sbuf.st_size) 530 goto done; 531 if (pipe(pdes) < 0) 532 goto done; 533 switch (fork()) { 534 case -1: /* error */ 535 (void)close(pdes[0]); 536 (void)close(pdes[1]); 537 goto done; 538 case 0: 539 /* child -- set stdin to pipe output */ 540 if (pdes[0] != STDIN_FILENO) { 541 (void)dup2(pdes[0], STDIN_FILENO); 542 (void)close(pdes[0]); 543 } 544 (void)close(pdes[1]); 545 execl(_PATH_SENDMAIL, "sendmail", "-i", "-t", "-F", 546 "\"Reminder Service\"", (char *)NULL); 547 warn(_PATH_SENDMAIL); 548 _exit(1); 549 } 550 /* parent -- write to pipe input */ 551 (void)close(pdes[0]); 552 553 write(pdes[1], "From: \"Reminder Service\" <", 26); 554 write(pdes[1], pw->pw_name, strlen(pw->pw_name)); 555 write(pdes[1], ">\nTo: <", 7); 556 write(pdes[1], pw->pw_name, strlen(pw->pw_name)); 557 write(pdes[1], ">\nSubject: ", 11); 558 write(pdes[1], dayname, strlen(dayname)); 559 write(pdes[1], "'s Calendar\nPrecedence: bulk\n\n", 30); 560 561 while ((nread = read(fileno(fp), buf, sizeof(buf))) > 0) 562 (void)write(pdes[1], buf, nread); 563 (void)close(pdes[1]); 564 done: (void)fclose(fp); 565 (void)unlink(path); 566 while (wait(&status) >= 0); 567 } 568