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