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 <libutil.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 static const char *cal_home; 79 static const char *cal_dir; 80 static const char *cal_file; 81 static int cal_line; 82 83 struct fixs neaster, npaskha, ncny, nfullmoon, nnewmoon; 84 struct fixs nmarequinox, nsepequinox, njunsolstice, ndecsolstice; 85 86 static int cal_parse(FILE *in, FILE *out); 87 88 static StringList *definitions = NULL; 89 static struct event *events[MAXCOUNT]; 90 static char *extradata[MAXCOUNT]; 91 92 static char * 93 trimlr(char **buf) 94 { 95 char *walk = *buf; 96 char *sep; 97 char *last; 98 99 while (isspace(*walk)) 100 walk++; 101 *buf = walk; 102 103 sep = walk; 104 while (*sep != '\0' && !isspace(*sep)) 105 sep++; 106 107 if (*sep != '\0') { 108 last = sep + strlen(sep) - 1; 109 while (last > walk && isspace(*last)) 110 last--; 111 *(last+1) = 0; 112 } 113 114 return (sep); 115 } 116 117 static FILE * 118 cal_fopen(const char *file) 119 { 120 FILE *fp; 121 char *home = getenv("HOME"); 122 unsigned int i; 123 struct stat sb; 124 static bool warned = false; 125 static char calendarhome[MAXPATHLEN]; 126 127 if (home == NULL || *home == '\0') { 128 warnx("Cannot get home directory"); 129 return (NULL); 130 } 131 132 if (chdir(home) != 0) { 133 warnx("Cannot enter home directory \"%s\"", home); 134 return (NULL); 135 } 136 137 for (i = 0; i < nitems(calendarHomes); i++) { 138 if (snprintf(calendarhome, sizeof (calendarhome), calendarHomes[i], 139 getlocalbase()) >= (int)sizeof (calendarhome)) 140 continue; 141 142 if (chdir(calendarhome) != 0) 143 continue; 144 145 if ((fp = fopen(file, "r")) != NULL) { 146 cal_home = home; 147 cal_dir = calendarhome; 148 cal_file = file; 149 return (fp); 150 } 151 } 152 153 warnx("can't open calendar file \"%s\"", file); 154 if (!warned) { 155 snprintf(path, sizeof(path), _PATH_INCLUDE_LOCAL, getlocalbase()); 156 if (stat(path, &sb) != 0) { 157 warnx("calendar data files now provided by calendar-data pkg."); 158 warned = true; 159 } 160 } 161 162 return (NULL); 163 } 164 165 static char* 166 cal_path(void) 167 { 168 static char buffer[MAXPATHLEN + 10]; 169 170 if (cal_dir == NULL) 171 snprintf(buffer, sizeof(buffer), "%s", cal_file); 172 else if (cal_dir[0] == '/') 173 snprintf(buffer, sizeof(buffer), "%s/%s", cal_dir, cal_file); 174 else 175 snprintf(buffer, sizeof(buffer), "%s/%s/%s", cal_home, cal_dir, cal_file); 176 return (buffer); 177 } 178 179 #define WARN0(format) \ 180 warnx(format " in %s line %d", cal_path(), cal_line) 181 #define WARN1(format, arg1) \ 182 warnx(format " in %s line %d", arg1, cal_path(), cal_line) 183 184 static char* 185 cmptoken(char *line, const char* token) 186 { 187 char len = strlen(token); 188 189 if (strncmp(line, token, len) != 0) 190 return NULL; 191 return (line + len); 192 } 193 194 static int 195 token(char *line, FILE *out, int *skip, int *unskip) 196 { 197 char *walk, *sep, a, c; 198 const char *this_cal_home; 199 const char *this_cal_dir; 200 const char *this_cal_file; 201 int this_cal_line; 202 203 while (isspace(*line)) 204 line++; 205 206 if (cmptoken(line, "endif")) { 207 if (*skip + *unskip == 0) { 208 WARN0("#endif without prior #ifdef or #ifndef"); 209 return (T_ERR); 210 } 211 if (*skip > 0) 212 --*skip; 213 else 214 --*unskip; 215 216 return (T_OK); 217 } 218 219 walk = cmptoken(line, "ifdef"); 220 if (walk != NULL) { 221 sep = trimlr(&walk); 222 223 if (*walk == '\0') { 224 WARN0("Expecting arguments after #ifdef"); 225 return (T_ERR); 226 } 227 if (*sep != '\0') { 228 WARN1("Expecting a single word after #ifdef " 229 "but got \"%s\"", walk); 230 return (T_ERR); 231 } 232 233 if (*skip != 0 || 234 definitions == NULL || sl_find(definitions, walk) == NULL) 235 ++*skip; 236 else 237 ++*unskip; 238 239 return (T_OK); 240 } 241 242 walk = cmptoken(line, "ifndef"); 243 if (walk != NULL) { 244 sep = trimlr(&walk); 245 246 if (*walk == '\0') { 247 WARN0("Expecting arguments after #ifndef"); 248 return (T_ERR); 249 } 250 if (*sep != '\0') { 251 WARN1("Expecting a single word after #ifndef " 252 "but got \"%s\"", walk); 253 return (T_ERR); 254 } 255 256 if (*skip != 0 || 257 (definitions != NULL && sl_find(definitions, walk) != NULL)) 258 ++*skip; 259 else 260 ++*unskip; 261 262 return (T_OK); 263 } 264 265 walk = cmptoken(line, "else"); 266 if (walk != NULL) { 267 (void)trimlr(&walk); 268 269 if (*walk != '\0') { 270 WARN0("Expecting no arguments after #else"); 271 return (T_ERR); 272 } 273 if (*skip + *unskip == 0) { 274 WARN0("#else without prior #ifdef or #ifndef"); 275 return (T_ERR); 276 } 277 278 if (*skip == 0) { 279 ++*skip; 280 --*unskip; 281 } else if (*skip == 1) { 282 --*skip; 283 ++*unskip; 284 } 285 286 return (T_OK); 287 } 288 289 if (*skip != 0) 290 return (T_OK); 291 292 walk = cmptoken(line, "include"); 293 if (walk != NULL) { 294 (void)trimlr(&walk); 295 296 if (*walk == '\0') { 297 WARN0("Expecting arguments after #include"); 298 return (T_ERR); 299 } 300 301 if (*walk != '<' && *walk != '\"') { 302 WARN0("Excecting '<' or '\"' after #include"); 303 return (T_ERR); 304 } 305 306 a = *walk == '<' ? '>' : '\"'; 307 walk++; 308 c = walk[strlen(walk) - 1]; 309 310 if (a != c) { 311 WARN1("Unterminated include expecting '%c'", a); 312 return (T_ERR); 313 } 314 walk[strlen(walk) - 1] = '\0'; 315 316 this_cal_home = cal_home; 317 this_cal_dir = cal_dir; 318 this_cal_file = cal_file; 319 this_cal_line = cal_line; 320 if (cal_parse(cal_fopen(walk), out)) 321 return (T_ERR); 322 cal_home = this_cal_home; 323 cal_dir = this_cal_dir; 324 cal_file = this_cal_file; 325 cal_line = this_cal_line; 326 327 return (T_OK); 328 } 329 330 walk = cmptoken(line, "define"); 331 if (walk != NULL) { 332 if (definitions == NULL) 333 definitions = sl_init(); 334 sep = trimlr(&walk); 335 *sep = '\0'; 336 337 if (*walk == '\0') { 338 WARN0("Expecting arguments after #define"); 339 return (T_ERR); 340 } 341 342 if (sl_find(definitions, walk) == NULL) 343 sl_add(definitions, strdup(walk)); 344 return (T_OK); 345 } 346 347 walk = cmptoken(line, "undef"); 348 if (walk != NULL) { 349 if (definitions != NULL) { 350 sep = trimlr(&walk); 351 352 if (*walk == '\0') { 353 WARN0("Expecting arguments after #undef"); 354 return (T_ERR); 355 } 356 if (*sep != '\0') { 357 WARN1("Expecting a single word after #undef " 358 "but got \"%s\"", walk); 359 return (T_ERR); 360 } 361 362 walk = sl_find(definitions, walk); 363 if (walk != NULL) 364 walk[0] = '\0'; 365 } 366 return (T_OK); 367 } 368 369 walk = cmptoken(line, "warning"); 370 if (walk != NULL) { 371 (void)trimlr(&walk); 372 WARN1("Warning: %s", walk); 373 } 374 375 walk = cmptoken(line, "error"); 376 if (walk != NULL) { 377 (void)trimlr(&walk); 378 WARN1("Error: %s", walk); 379 return (T_ERR); 380 } 381 382 WARN1("Undefined pre-processor command \"#%s\"", line); 383 return (T_ERR); 384 } 385 386 static void 387 setup_locale(const char *locale) 388 { 389 (void)setlocale(LC_ALL, locale); 390 #ifdef WITH_ICONV 391 if (!doall) 392 set_new_encoding(); 393 #endif 394 setnnames(); 395 } 396 397 #define REPLACE(string, slen, struct_) \ 398 if (strncasecmp(buf, (string), (slen)) == 0 && buf[(slen)]) { \ 399 if (struct_.name != NULL) \ 400 free(struct_.name); \ 401 if ((struct_.name = strdup(buf + (slen))) == NULL) \ 402 errx(1, "cannot allocate memory"); \ 403 struct_.len = strlen(buf + (slen)); \ 404 continue; \ 405 } 406 static int 407 cal_parse(FILE *in, FILE *out) 408 { 409 char *mylocale = NULL; 410 char *line = NULL; 411 char *buf, *bufp; 412 size_t linecap = 0; 413 ssize_t linelen; 414 ssize_t l; 415 static int count = 0; 416 int i; 417 int month[MAXCOUNT]; 418 int day[MAXCOUNT]; 419 int year[MAXCOUNT]; 420 int skip = 0; 421 int unskip = 0; 422 char *pp, p; 423 int flags; 424 char *c, *cc; 425 bool incomment = false; 426 427 if (in == NULL) 428 return (1); 429 430 cal_line = 0; 431 while ((linelen = getline(&line, &linecap, in)) > 0) { 432 cal_line++; 433 buf = line; 434 if (buf[linelen - 1] == '\n') 435 buf[--linelen] = '\0'; 436 437 if (incomment) { 438 c = strstr(buf, "*/"); 439 if (c) { 440 c += 2; 441 linelen -= c - buf; 442 buf = c; 443 incomment = false; 444 } else { 445 continue; 446 } 447 } 448 if (!incomment) { 449 bufp = buf; 450 do { 451 c = strstr(bufp, "//"); 452 cc = strstr(bufp, "/*"); 453 if (c != NULL && (cc == NULL || c - cc < 0)) { 454 bufp = c + 2; 455 /* ignore "//" within string to allow it in an URL */ 456 if (c == buf || isspace(c[-1])) { 457 /* single line comment */ 458 *c = '\0'; 459 linelen = c - buf; 460 break; 461 } 462 } else if (cc != NULL) { 463 c = strstr(cc + 2, "*/"); 464 if (c != NULL) { // 'a /* b */ c' -- cc=2, c=7+2 465 /* multi-line comment ending on same line */ 466 c += 2; 467 memmove(cc, c, buf + linelen + 1 - c); 468 linelen -= c - cc; 469 bufp = cc; 470 } else { 471 /* multi-line comment */ 472 *cc = '\0'; 473 linelen = cc - buf; 474 incomment = true; 475 break; 476 } 477 } 478 } while (c != NULL || cc != NULL); 479 } 480 481 for (l = linelen; 482 l > 0 && isspace((unsigned char)buf[l - 1]); 483 l--) 484 ; 485 buf[l] = '\0'; 486 if (buf[0] == '\0') 487 continue; 488 489 if (buf == line && *buf == '#') { 490 switch (token(buf+1, out, &skip, &unskip)) { 491 case T_ERR: 492 free(line); 493 return (1); 494 case T_OK: 495 continue; 496 case T_PROCESS: 497 break; 498 default: 499 break; 500 } 501 } 502 503 if (skip != 0) 504 continue; 505 506 /* 507 * Setting LANG in user's calendar was an old workaround 508 * for 'calendar -a' being run with C locale to properly 509 * print user's calendars in their native languages. 510 * Now that 'calendar -a' does fork with setusercontext(), 511 * and does not run iconv(), this variable has little use. 512 */ 513 if (strncmp(buf, "LANG=", 5) == 0) { 514 if (mylocale == NULL) 515 mylocale = strdup(setlocale(LC_ALL, NULL)); 516 setup_locale(buf + 5); 517 continue; 518 } 519 /* Parse special definitions: Easter, Paskha etc */ 520 REPLACE("Easter=", 7, neaster); 521 REPLACE("Paskha=", 7, npaskha); 522 REPLACE("ChineseNewYear=", 15, ncny); 523 REPLACE("NewMoon=", 8, nnewmoon); 524 REPLACE("FullMoon=", 9, nfullmoon); 525 REPLACE("MarEquinox=", 11, nmarequinox); 526 REPLACE("SepEquinox=", 11, nsepequinox); 527 REPLACE("JunSolstice=", 12, njunsolstice); 528 REPLACE("DecSolstice=", 12, ndecsolstice); 529 if (strncmp(buf, "SEQUENCE=", 9) == 0) { 530 setnsequences(buf + 9); 531 continue; 532 } 533 534 /* 535 * If the line starts with a tab, the data has to be 536 * added to the previous line 537 */ 538 if (buf[0] == '\t') { 539 for (i = 0; i < count; i++) 540 event_continue(events[i], buf); 541 continue; 542 } 543 544 /* Get rid of leading spaces (non-standard) */ 545 while (isspace((unsigned char)buf[0])) 546 memcpy(buf, buf + 1, strlen(buf)); 547 548 /* No tab in the line, then not a valid line */ 549 if ((pp = strchr(buf, '\t')) == NULL) 550 continue; 551 552 /* Trim spaces in front of the tab */ 553 while (isspace((unsigned char)pp[-1])) 554 pp--; 555 556 p = *pp; 557 *pp = '\0'; 558 if ((count = parsedaymonth(buf, year, month, day, &flags, 559 extradata)) == 0) 560 continue; 561 *pp = p; 562 if (count < 0) { 563 /* Show error status based on return value */ 564 if (debug) 565 WARN1("Ignored: \"%s\"", buf); 566 if (count == -1) 567 continue; 568 count = -count + 1; 569 } 570 571 /* Find the last tab */ 572 while (pp[1] == '\t') 573 pp++; 574 575 for (i = 0; i < count; i++) { 576 if (debug) 577 WARN1("got \"%s\"", pp); 578 events[i] = event_add(year[i], month[i], day[i], 579 ((flags &= F_VARIABLE) != 0) ? 1 : 0, pp, 580 extradata[i]); 581 } 582 } 583 while (skip-- > 0 || unskip-- > 0) { 584 cal_line++; 585 WARN0("Missing #endif assumed"); 586 } 587 588 free(line); 589 fclose(in); 590 if (mylocale != NULL) { 591 setup_locale(mylocale); 592 free(mylocale); 593 } 594 595 return (0); 596 } 597 598 void 599 cal(void) 600 { 601 FILE *fpin; 602 FILE *fpout; 603 int i; 604 605 for (i = 0; i < MAXCOUNT; i++) 606 extradata[i] = (char *)calloc(1, 20); 607 608 609 if ((fpin = opencalin()) == NULL) 610 return; 611 612 if ((fpout = opencalout()) == NULL) { 613 fclose(fpin); 614 return; 615 } 616 617 if (cal_parse(fpin, fpout)) 618 return; 619 620 event_print_all(fpout); 621 closecal(fpout); 622 } 623 624 FILE * 625 opencalin(void) 626 { 627 struct stat sbuf; 628 FILE *fpin; 629 630 /* open up calendar file */ 631 cal_file = calendarFile; 632 if ((fpin = fopen(calendarFile, "r")) == NULL) { 633 if (doall) { 634 if (chdir(calendarHomes[0]) != 0) 635 return (NULL); 636 if (stat(calendarNoMail, &sbuf) == 0) 637 return (NULL); 638 if ((fpin = fopen(calendarFile, "r")) == NULL) 639 return (NULL); 640 } else { 641 fpin = cal_fopen(calendarFile); 642 } 643 } 644 return (fpin); 645 } 646 647 FILE * 648 opencalout(void) 649 { 650 int fd; 651 652 /* not reading all calendar files, just set output to stdout */ 653 if (!doall) 654 return (stdout); 655 656 /* set output to a temporary file, so if no output don't send mail */ 657 snprintf(path, sizeof(path), "%s/_calXXXXXX", _PATH_TMP); 658 if ((fd = mkstemp(path)) < 0) 659 return (NULL); 660 return (fdopen(fd, "w+")); 661 } 662 663 void 664 closecal(FILE *fp) 665 { 666 struct stat sbuf; 667 int nread, pdes[2], status; 668 char buf[1024]; 669 670 if (!doall) 671 return; 672 673 rewind(fp); 674 if (fstat(fileno(fp), &sbuf) || !sbuf.st_size) 675 goto done; 676 if (pipe(pdes) < 0) 677 goto done; 678 switch (fork()) { 679 case -1: /* error */ 680 (void)close(pdes[0]); 681 (void)close(pdes[1]); 682 goto done; 683 case 0: 684 /* child -- set stdin to pipe output */ 685 if (pdes[0] != STDIN_FILENO) { 686 (void)dup2(pdes[0], STDIN_FILENO); 687 (void)close(pdes[0]); 688 } 689 (void)close(pdes[1]); 690 execl(_PATH_SENDMAIL, "sendmail", "-i", "-t", "-F", 691 "\"Reminder Service\"", (char *)NULL); 692 warn(_PATH_SENDMAIL); 693 _exit(1); 694 } 695 /* parent -- write to pipe input */ 696 (void)close(pdes[0]); 697 698 write(pdes[1], "From: \"Reminder Service\" <", 26); 699 write(pdes[1], pw->pw_name, strlen(pw->pw_name)); 700 write(pdes[1], ">\nTo: <", 7); 701 write(pdes[1], pw->pw_name, strlen(pw->pw_name)); 702 write(pdes[1], ">\nSubject: ", 11); 703 write(pdes[1], dayname, strlen(dayname)); 704 write(pdes[1], "'s Calendar\nPrecedence: bulk\n\n", 30); 705 706 while ((nread = read(fileno(fp), buf, sizeof(buf))) > 0) 707 (void)write(pdes[1], buf, nread); 708 (void)close(pdes[1]); 709 done: (void)fclose(fp); 710 (void)unlink(path); 711 while (wait(&status) >= 0); 712 } 713