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 <locale.h> 54 #include <pwd.h> 55 #include <stdbool.h> 56 #include <stdio.h> 57 #include <stdlib.h> 58 #include <string.h> 59 #include <stringlist.h> 60 #include <time.h> 61 #include <unistd.h> 62 63 #include "pathnames.h" 64 #include "calendar.h" 65 66 enum { 67 T_OK = 0, 68 T_ERR, 69 T_PROCESS, 70 }; 71 72 const char *calendarFile = "calendar"; /* default calendar file */ 73 static const char *calendarHomes[] = {".calendar", _PATH_INCLUDE_LOCAL, _PATH_INCLUDE}; /* HOME */ 74 static const char *calendarNoMail = "nomail";/* don't sent mail if file exist */ 75 76 static char path[MAXPATHLEN]; 77 static const char *cal_home; 78 static const char *cal_dir; 79 static const char *cal_file; 80 static int cal_line; 81 82 struct fixs neaster, npaskha, ncny, nfullmoon, nnewmoon; 83 struct fixs nmarequinox, nsepequinox, njunsolstice, ndecsolstice; 84 85 static int cal_parse(FILE *in, FILE *out); 86 87 static StringList *definitions = NULL; 88 static struct event *events[MAXCOUNT]; 89 static char *extradata[MAXCOUNT]; 90 91 static char * 92 trimlr(char **buf) 93 { 94 char *walk = *buf; 95 char *sep; 96 char *last; 97 98 while (isspace(*walk)) 99 walk++; 100 *buf = walk; 101 102 sep = walk; 103 while (*sep != '\0' && !isspace(*sep)) 104 sep++; 105 106 if (*sep != '\0') { 107 last = sep + strlen(sep) - 1; 108 while (last > walk && isspace(*last)) 109 last--; 110 *(last+1) = 0; 111 } 112 113 return (sep); 114 } 115 116 static FILE * 117 cal_fopen(const char *file) 118 { 119 FILE *fp; 120 char *home = getenv("HOME"); 121 unsigned int i; 122 struct stat sb; 123 static bool warned = false; 124 125 if (home == NULL || *home == '\0') { 126 warnx("Cannot get home directory"); 127 return (NULL); 128 } 129 130 if (chdir(home) != 0) { 131 warnx("Cannot enter home directory \"%s\"", home); 132 return (NULL); 133 } 134 135 for (i = 0; i < nitems(calendarHomes); i++) { 136 if (chdir(calendarHomes[i]) != 0) 137 continue; 138 139 if ((fp = fopen(file, "r")) != NULL) { 140 cal_home = home; 141 cal_dir = calendarHomes[i]; 142 cal_file = file; 143 return (fp); 144 } 145 } 146 147 warnx("can't open calendar file \"%s\"", file); 148 if (!warned && stat(_PATH_INCLUDE_LOCAL, &sb) != 0) { 149 warnx("calendar data files now provided by calendar-data pkg."); 150 warned = true; 151 } 152 153 return (NULL); 154 } 155 156 static char* 157 cal_path(void) 158 { 159 static char buffer[MAXPATHLEN + 10]; 160 161 if (cal_dir == NULL) 162 snprintf(buffer, sizeof(buffer), "%s", cal_file); 163 else if (cal_dir[0] == '/') 164 snprintf(buffer, sizeof(buffer), "%s/%s", cal_dir, cal_file); 165 else 166 snprintf(buffer, sizeof(buffer), "%s/%s/%s", cal_home, cal_dir, cal_file); 167 return (buffer); 168 } 169 170 #define WARN0(format) \ 171 warnx(format " in %s line %d", cal_path(), cal_line) 172 #define WARN1(format, arg1) \ 173 warnx(format " in %s line %d", arg1, cal_path(), cal_line) 174 175 static int 176 token(char *line, FILE *out, int *skip, int *unskip) 177 { 178 char *walk, *sep, a, c; 179 const char *this_cal_home; 180 const char *this_cal_dir; 181 const char *this_cal_file; 182 int this_cal_line; 183 184 if (strncmp(line, "endif", 5) == 0) { 185 if (*skip + *unskip == 0) { 186 WARN0("#endif without prior #ifdef or #ifndef"); 187 return (T_ERR); 188 } 189 if (*skip > 0) 190 --*skip; 191 else 192 --*unskip; 193 194 return (T_OK); 195 } 196 197 if (strncmp(line, "ifdef", 5) == 0) { 198 walk = line + 5; 199 sep = trimlr(&walk); 200 201 if (*walk == '\0') { 202 WARN0("Expecting arguments after #ifdef"); 203 return (T_ERR); 204 } 205 if (*sep != '\0') { 206 WARN1("Expecting a single word after #ifdef " 207 "but got \"%s\"", walk); 208 return (T_ERR); 209 } 210 211 if (*skip != 0 || 212 definitions == NULL || sl_find(definitions, walk) == NULL) 213 ++*skip; 214 else 215 ++*unskip; 216 217 return (T_OK); 218 } 219 220 if (strncmp(line, "ifndef", 6) == 0) { 221 walk = line + 6; 222 sep = trimlr(&walk); 223 224 if (*walk == '\0') { 225 WARN0("Expecting arguments after #ifndef"); 226 return (T_ERR); 227 } 228 if (*sep != '\0') { 229 WARN1("Expecting a single word after #ifndef " 230 "but got \"%s\"", walk); 231 return (T_ERR); 232 } 233 234 if (*skip != 0 || 235 (definitions != NULL && sl_find(definitions, walk) != NULL)) 236 ++*skip; 237 else 238 ++*unskip; 239 240 return (T_OK); 241 } 242 243 if (strncmp(line, "else", 4) == 0) { 244 walk = line + 4; 245 (void)trimlr(&walk); 246 247 if (*walk != '\0') { 248 WARN0("Expecting no arguments after #else"); 249 return (T_ERR); 250 } 251 if (*skip + *unskip == 0) { 252 WARN0("#else without prior #ifdef or #ifndef"); 253 return (T_ERR); 254 } 255 256 if (*skip == 0) { 257 ++*skip; 258 --*unskip; 259 } else if (*skip == 1) { 260 --*skip; 261 ++*unskip; 262 } 263 264 return (T_OK); 265 } 266 267 if (*skip != 0) 268 return (T_OK); 269 270 if (strncmp(line, "include", 7) == 0) { 271 walk = line + 7; 272 273 (void)trimlr(&walk); 274 275 if (*walk == '\0') { 276 WARN0("Expecting arguments after #include"); 277 return (T_ERR); 278 } 279 280 if (*walk != '<' && *walk != '\"') { 281 WARN0("Excecting '<' or '\"' after #include"); 282 return (T_ERR); 283 } 284 285 a = *walk == '<' ? '>' : '\"'; 286 walk++; 287 c = walk[strlen(walk) - 1]; 288 289 if (a != c) { 290 WARN1("Unterminated include expecting '%c'", a); 291 return (T_ERR); 292 } 293 walk[strlen(walk) - 1] = '\0'; 294 295 this_cal_home = cal_home; 296 this_cal_dir = cal_dir; 297 this_cal_file = cal_file; 298 this_cal_line = cal_line; 299 if (cal_parse(cal_fopen(walk), out)) 300 return (T_ERR); 301 cal_home = this_cal_home; 302 cal_dir = this_cal_dir; 303 cal_file = this_cal_file; 304 cal_line = this_cal_line; 305 306 return (T_OK); 307 } 308 309 if (strncmp(line, "define", 6) == 0) { 310 if (definitions == NULL) 311 definitions = sl_init(); 312 walk = line + 6; 313 sep = trimlr(&walk); 314 *sep = '\0'; 315 316 if (*walk == '\0') { 317 WARN0("Expecting arguments after #define"); 318 return (T_ERR); 319 } 320 321 if (sl_find(definitions, walk) == NULL) 322 sl_add(definitions, strdup(walk)); 323 return (T_OK); 324 } 325 326 if (strncmp(line, "undef", 5) == 0) { 327 if (definitions != NULL) { 328 walk = line + 5; 329 sep = trimlr(&walk); 330 331 if (*walk == '\0') { 332 WARN0("Expecting arguments after #undef"); 333 return (T_ERR); 334 } 335 if (*sep != '\0') { 336 WARN1("Expecting a single word after #undef " 337 "but got \"%s\"", walk); 338 return (T_ERR); 339 } 340 341 walk = sl_find(definitions, walk); 342 if (walk != NULL) 343 walk[0] = '\0'; 344 } 345 return (T_OK); 346 } 347 348 return (T_PROCESS); 349 350 } 351 352 #define REPLACE(string, slen, struct_) \ 353 if (strncasecmp(buf, (string), (slen)) == 0 && buf[(slen)]) { \ 354 if (struct_.name != NULL) \ 355 free(struct_.name); \ 356 if ((struct_.name = strdup(buf + (slen))) == NULL) \ 357 errx(1, "cannot allocate memory"); \ 358 struct_.len = strlen(buf + (slen)); \ 359 continue; \ 360 } 361 static int 362 cal_parse(FILE *in, FILE *out) 363 { 364 char *line = NULL; 365 char *buf; 366 size_t linecap = 0; 367 ssize_t linelen; 368 ssize_t l; 369 static int count = 0; 370 int i; 371 int month[MAXCOUNT]; 372 int day[MAXCOUNT]; 373 int year[MAXCOUNT]; 374 int skip = 0; 375 int unskip = 0; 376 char *pp, p; 377 int flags; 378 char *c, *cc; 379 bool incomment = false; 380 381 if (in == NULL) 382 return (1); 383 384 cal_line = 0; 385 while ((linelen = getline(&line, &linecap, in)) > 0) { 386 cal_line++; 387 buf = line; 388 if (buf[linelen - 1] == '\n') 389 buf[--linelen] = '\0'; 390 391 if (incomment) { 392 c = strstr(buf, "*/"); 393 if (c) { 394 c += 2; 395 linelen -= c - buf; 396 buf = c; 397 incomment = false; 398 } else { 399 continue; 400 } 401 } 402 if (!incomment) { 403 do { 404 c = strstr(buf, "//"); 405 cc = strstr(buf, "/*"); 406 if (c != NULL && (cc == NULL || c - cc < 0)) { 407 /* single line comment */ 408 *c = '\0'; 409 linelen = c - buf; 410 break; 411 } else if (cc != NULL) { 412 c = strstr(cc + 2, "*/"); 413 if (c != NULL) { 414 /* multi-line comment ending on same line */ 415 c += 2; 416 memmove(cc, c, buf + linelen + 1 - c); 417 linelen -= c - cc; 418 } else { 419 /* multi-line comment */ 420 *cc = '\0'; 421 linelen = cc - buf; 422 incomment = true; 423 break; 424 } 425 } 426 } while (c != NULL || cc != NULL); 427 } 428 429 for (l = linelen; 430 l > 0 && isspace((unsigned char)buf[l - 1]); 431 l--) 432 ; 433 buf[l] = '\0'; 434 if (buf[0] == '\0') 435 continue; 436 437 if (buf == line && *buf == '#') { 438 switch (token(buf+1, out, &skip, &unskip)) { 439 case T_ERR: 440 free(line); 441 return (1); 442 case T_OK: 443 continue; 444 case T_PROCESS: 445 break; 446 default: 447 break; 448 } 449 } 450 451 if (skip != 0) 452 continue; 453 454 /* 455 * Setting LANG in user's calendar was an old workaround 456 * for 'calendar -a' being run with C locale to properly 457 * print user's calendars in their native languages. 458 * Now that 'calendar -a' does fork with setusercontext(), 459 * and does not run iconv(), this variable has little use. 460 */ 461 if (strncmp(buf, "LANG=", 5) == 0) { 462 (void)setlocale(LC_ALL, buf + 5); 463 #ifdef WITH_ICONV 464 if (!doall) 465 set_new_encoding(); 466 #endif 467 setnnames(); 468 continue; 469 } 470 /* Parse special definitions: Easter, Paskha etc */ 471 REPLACE("Easter=", 7, neaster); 472 REPLACE("Paskha=", 7, npaskha); 473 REPLACE("ChineseNewYear=", 15, ncny); 474 REPLACE("NewMoon=", 8, nnewmoon); 475 REPLACE("FullMoon=", 9, nfullmoon); 476 REPLACE("MarEquinox=", 11, nmarequinox); 477 REPLACE("SepEquinox=", 11, nsepequinox); 478 REPLACE("JunSolstice=", 12, njunsolstice); 479 REPLACE("DecSolstice=", 12, ndecsolstice); 480 if (strncmp(buf, "SEQUENCE=", 9) == 0) { 481 setnsequences(buf + 9); 482 continue; 483 } 484 485 /* 486 * If the line starts with a tab, the data has to be 487 * added to the previous line 488 */ 489 if (buf[0] == '\t') { 490 for (i = 0; i < count; i++) 491 event_continue(events[i], buf); 492 continue; 493 } 494 495 /* Get rid of leading spaces (non-standard) */ 496 while (isspace((unsigned char)buf[0])) 497 memcpy(buf, buf + 1, strlen(buf)); 498 499 /* No tab in the line, then not a valid line */ 500 if ((pp = strchr(buf, '\t')) == NULL) 501 continue; 502 503 /* Trim spaces in front of the tab */ 504 while (isspace((unsigned char)pp[-1])) 505 pp--; 506 507 p = *pp; 508 *pp = '\0'; 509 if ((count = parsedaymonth(buf, year, month, day, &flags, 510 extradata)) == 0) 511 continue; 512 *pp = p; 513 if (count < 0) { 514 /* Show error status based on return value */ 515 if (debug) 516 WARN1("Ignored: \"%s\"", buf); 517 if (count == -1) 518 continue; 519 count = -count + 1; 520 } 521 522 /* Find the last tab */ 523 while (pp[1] == '\t') 524 pp++; 525 526 for (i = 0; i < count; i++) { 527 if (debug) 528 WARN1("got \"%s\"", pp); 529 events[i] = event_add(year[i], month[i], day[i], 530 ((flags &= F_VARIABLE) != 0) ? 1 : 0, pp, 531 extradata[i]); 532 } 533 } 534 while (skip-- > 0 || unskip-- > 0) { 535 cal_line++; 536 WARN0("Missing #endif assumed"); 537 } 538 539 free(line); 540 fclose(in); 541 542 return (0); 543 } 544 545 void 546 cal(void) 547 { 548 FILE *fpin; 549 FILE *fpout; 550 int i; 551 552 for (i = 0; i < MAXCOUNT; i++) 553 extradata[i] = (char *)calloc(1, 20); 554 555 556 if ((fpin = opencalin()) == NULL) 557 return; 558 559 if ((fpout = opencalout()) == NULL) { 560 fclose(fpin); 561 return; 562 } 563 564 if (cal_parse(fpin, fpout)) 565 return; 566 567 event_print_all(fpout); 568 closecal(fpout); 569 } 570 571 FILE * 572 opencalin(void) 573 { 574 struct stat sbuf; 575 FILE *fpin; 576 577 /* open up calendar file */ 578 cal_file = calendarFile; 579 if ((fpin = fopen(calendarFile, "r")) == NULL) { 580 if (doall) { 581 if (chdir(calendarHomes[0]) != 0) 582 return (NULL); 583 if (stat(calendarNoMail, &sbuf) == 0) 584 return (NULL); 585 if ((fpin = fopen(calendarFile, "r")) == NULL) 586 return (NULL); 587 } else { 588 fpin = cal_fopen(calendarFile); 589 } 590 } 591 return (fpin); 592 } 593 594 FILE * 595 opencalout(void) 596 { 597 int fd; 598 599 /* not reading all calendar files, just set output to stdout */ 600 if (!doall) 601 return (stdout); 602 603 /* set output to a temporary file, so if no output don't send mail */ 604 snprintf(path, sizeof(path), "%s/_calXXXXXX", _PATH_TMP); 605 if ((fd = mkstemp(path)) < 0) 606 return (NULL); 607 return (fdopen(fd, "w+")); 608 } 609 610 void 611 closecal(FILE *fp) 612 { 613 struct stat sbuf; 614 int nread, pdes[2], status; 615 char buf[1024]; 616 617 if (!doall) 618 return; 619 620 rewind(fp); 621 if (fstat(fileno(fp), &sbuf) || !sbuf.st_size) 622 goto done; 623 if (pipe(pdes) < 0) 624 goto done; 625 switch (fork()) { 626 case -1: /* error */ 627 (void)close(pdes[0]); 628 (void)close(pdes[1]); 629 goto done; 630 case 0: 631 /* child -- set stdin to pipe output */ 632 if (pdes[0] != STDIN_FILENO) { 633 (void)dup2(pdes[0], STDIN_FILENO); 634 (void)close(pdes[0]); 635 } 636 (void)close(pdes[1]); 637 execl(_PATH_SENDMAIL, "sendmail", "-i", "-t", "-F", 638 "\"Reminder Service\"", (char *)NULL); 639 warn(_PATH_SENDMAIL); 640 _exit(1); 641 } 642 /* parent -- write to pipe input */ 643 (void)close(pdes[0]); 644 645 write(pdes[1], "From: \"Reminder Service\" <", 26); 646 write(pdes[1], pw->pw_name, strlen(pw->pw_name)); 647 write(pdes[1], ">\nTo: <", 7); 648 write(pdes[1], pw->pw_name, strlen(pw->pw_name)); 649 write(pdes[1], ">\nSubject: ", 11); 650 write(pdes[1], dayname, strlen(dayname)); 651 write(pdes[1], "'s Calendar\nPrecedence: bulk\n\n", 30); 652 653 while ((nread = read(fileno(fp), buf, sizeof(buf))) > 0) 654 (void)write(pdes[1], buf, nread); 655 (void)close(pdes[1]); 656 done: (void)fclose(fp); 657 (void)unlink(path); 658 while (wait(&status) >= 0); 659 } 660