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 (*line == '#') { 261 switch (token(line+1, out, &skip)) { 262 case T_ERR: 263 free(line); 264 return (1); 265 case T_OK: 266 continue; 267 case T_PROCESS: 268 break; 269 default: 270 break; 271 } 272 } 273 274 if (skip) 275 continue; 276 277 buf = line; 278 for (l = linelen; 279 l > 0 && isspace((unsigned char)buf[l - 1]); 280 l--) 281 ; 282 buf[l] = '\0'; 283 if (buf[0] == '\0') 284 continue; 285 286 /* Parse special definitions: LANG, Easter, Paskha etc */ 287 if (strncmp(buf, "LANG=", 5) == 0) { 288 (void)setlocale(LC_ALL, buf + 5); 289 d_first = (*nl_langinfo(D_MD_ORDER) == 'd'); 290 setnnames(); 291 continue; 292 } 293 REPLACE("Easter=", 7, neaster); 294 REPLACE("Paskha=", 7, npaskha); 295 REPLACE("ChineseNewYear=", 15, ncny); 296 REPLACE("NewMoon=", 8, nnewmoon); 297 REPLACE("FullMoon=", 9, nfullmoon); 298 REPLACE("MarEquinox=", 11, nmarequinox); 299 REPLACE("SepEquinox=", 11, nsepequinox); 300 REPLACE("JunSolstice=", 12, njunsolstice); 301 REPLACE("DecSolstice=", 12, ndecsolstice); 302 if (strncmp(buf, "SEQUENCE=", 9) == 0) { 303 setnsequences(buf + 9); 304 continue; 305 } 306 307 /* 308 * If the line starts with a tab, the data has to be 309 * added to the previous line 310 */ 311 if (buf[0] == '\t') { 312 for (i = 0; i < count; i++) 313 event_continue(events[i], buf); 314 continue; 315 } 316 317 /* Get rid of leading spaces (non-standard) */ 318 while (isspace((unsigned char)buf[0])) 319 memcpy(buf, buf + 1, strlen(buf)); 320 321 /* No tab in the line, then not a valid line */ 322 if ((pp = strchr(buf, '\t')) == NULL) 323 continue; 324 325 /* Trim spaces in front of the tab */ 326 while (isspace((unsigned char)pp[-1])) 327 pp--; 328 329 p = *pp; 330 *pp = '\0'; 331 if ((count = parsedaymonth(buf, year, month, day, &flags, 332 extradata)) == 0) 333 continue; 334 *pp = p; 335 if (count < 0) { 336 /* Show error status based on return value */ 337 if (debug) 338 fprintf(stderr, "Ignored: %s\n", buf); 339 if (count == -1) 340 continue; 341 count = -count + 1; 342 } 343 344 /* Find the last tab */ 345 while (pp[1] == '\t') 346 pp++; 347 348 if (d_first < 0) 349 d_first = (*nl_langinfo(D_MD_ORDER) == 'd'); 350 351 for (i = 0; i < count; i++) { 352 tm.tm_mon = month[i] - 1; 353 tm.tm_mday = day[i]; 354 tm.tm_year = year[i] - 1900; 355 (void)strftime(dbuf, sizeof(dbuf), 356 d_first ? "%e %b" : "%b %e", &tm); 357 if (debug) 358 fprintf(stderr, "got %s\n", pp); 359 events[i] = event_add(year[i], month[i], day[i], dbuf, 360 ((flags &= F_VARIABLE) != 0) ? 1 : 0, pp, 361 extradata[i]); 362 } 363 } 364 365 free(line); 366 fclose(in); 367 368 return (0); 369 } 370 371 void 372 cal(void) 373 { 374 FILE *fpin; 375 FILE *fpout; 376 int i; 377 378 for (i = 0; i < MAXCOUNT; i++) 379 extradata[i] = (char *)calloc(1, 20); 380 381 382 if ((fpin = opencalin()) == NULL) 383 return; 384 385 if ((fpout = opencalout()) == NULL) { 386 fclose(fpin); 387 return; 388 } 389 390 if (cal_parse(fpin, fpout)) 391 return; 392 393 event_print_all(fpout); 394 closecal(fpout); 395 } 396 397 FILE * 398 opencalin(void) 399 { 400 struct stat sbuf; 401 FILE *fpin; 402 403 /* open up calendar file */ 404 if ((fpin = fopen(calendarFile, "r")) == NULL) { 405 if (doall) { 406 if (chdir(calendarHomes[0]) != 0) 407 return (NULL); 408 if (stat(calendarNoMail, &sbuf) == 0) 409 return (NULL); 410 if ((fpin = fopen(calendarFile, "r")) == NULL) 411 return (NULL); 412 } else { 413 fpin = cal_fopen(calendarFile); 414 } 415 } 416 return (fpin); 417 } 418 419 FILE * 420 opencalout(void) 421 { 422 int fd; 423 424 /* not reading all calendar files, just set output to stdout */ 425 if (!doall) 426 return (stdout); 427 428 /* set output to a temporary file, so if no output don't send mail */ 429 snprintf(path, sizeof(path), "%s/_calXXXXXX", _PATH_TMP); 430 if ((fd = mkstemp(path)) < 0) 431 return (NULL); 432 return (fdopen(fd, "w+")); 433 } 434 435 void 436 closecal(FILE *fp) 437 { 438 uid_t uid; 439 struct stat sbuf; 440 int nread, pdes[2], status; 441 char buf[1024]; 442 443 if (!doall) 444 return; 445 446 rewind(fp); 447 if (fstat(fileno(fp), &sbuf) || !sbuf.st_size) 448 goto done; 449 if (pipe(pdes) < 0) 450 goto done; 451 switch (fork()) { 452 case -1: /* error */ 453 (void)close(pdes[0]); 454 (void)close(pdes[1]); 455 goto done; 456 case 0: 457 /* child -- set stdin to pipe output */ 458 if (pdes[0] != STDIN_FILENO) { 459 (void)dup2(pdes[0], STDIN_FILENO); 460 (void)close(pdes[0]); 461 } 462 (void)close(pdes[1]); 463 uid = geteuid(); 464 if (setuid(getuid()) < 0) { 465 warnx("setuid failed"); 466 _exit(1); 467 }; 468 if (setgid(getegid()) < 0) { 469 warnx("setgid failed"); 470 _exit(1); 471 } 472 if (setuid(uid) < 0) { 473 warnx("setuid failed"); 474 _exit(1); 475 } 476 execl(_PATH_SENDMAIL, "sendmail", "-i", "-t", "-F", 477 "\"Reminder Service\"", (char *)NULL); 478 warn(_PATH_SENDMAIL); 479 _exit(1); 480 } 481 /* parent -- write to pipe input */ 482 (void)close(pdes[0]); 483 484 write(pdes[1], "From: \"Reminder Service\" <", 26); 485 write(pdes[1], pw->pw_name, strlen(pw->pw_name)); 486 write(pdes[1], ">\nTo: <", 7); 487 write(pdes[1], pw->pw_name, strlen(pw->pw_name)); 488 write(pdes[1], ">\nSubject: ", 11); 489 write(pdes[1], dayname, strlen(dayname)); 490 write(pdes[1], "'s Calendar\nPrecedence: bulk\n\n", 30); 491 492 while ((nread = read(fileno(fp), buf, sizeof(buf))) > 0) 493 (void)write(pdes[1], buf, nread); 494 (void)close(pdes[1]); 495 done: (void)fclose(fp); 496 (void)unlink(path); 497 while (wait(&status) >= 0); 498 } 499