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1.50 ! deraadt 1: /* $OpenBSD: io.c,v 1.49 2019/06/28 13:35:00 deraadt Exp $ */
1.1 millert 2:
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.
1.24 millert 15: * 3. Neither the name of the University nor the names of its contributors
1.1 millert 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: #include <sys/stat.h>
33: #include <sys/time.h>
34: #include <sys/types.h>
35: #include <sys/uio.h>
36: #include <sys/wait.h>
37:
38: #include <ctype.h>
39: #include <err.h>
40: #include <errno.h>
1.14 pjanzen 41: #include <fcntl.h>
1.1 millert 42: #include <locale.h>
43: #include <pwd.h>
44: #include <stdio.h>
45: #include <stdlib.h>
46: #include <string.h>
47: #include <unistd.h>
1.37 deraadt 48: #include <limits.h>
1.1 millert 49:
50: #include "pathnames.h"
51: #include "calendar.h"
52:
53:
54: struct iovec header[] = {
1.31 deraadt 55: { "From: ", 6 },
56: { NULL, 0 },
57: { " (Reminder Service)\nTo: ", 24 },
58: { NULL, 0 },
59: { "\nSubject: ", 10 },
60: { NULL, 0 },
1.33 deraadt 61: { "'s Calendar\nPrecedence: bulk\n", 29 },
62: { "Auto-Submitted: auto-generated\n\n", 32 },
1.1 millert 63: };
64:
65:
66: void
1.20 vincent 67: cal(void)
1.1 millert 68: {
1.31 deraadt 69: int ch, l, i, bodun = 0, bodun_maybe = 0, var, printing;
1.6 pjanzen 70: struct event *events, *cur_evt, *ev1, *tmp;
1.31 deraadt 71: char buf[2048 + 1], *prefix = NULL, *p;
1.5 pjanzen 72: struct match *m;
1.31 deraadt 73: FILE *fp;
1.1 millert 74:
1.5 pjanzen 75: events = NULL;
76: cur_evt = NULL;
1.1 millert 77: if ((fp = opencal()) == NULL)
78: return;
79: for (printing = 0; fgets(buf, sizeof(buf), stdin) != NULL;) {
80: if ((p = strchr(buf, '\n')) != NULL)
81: *p = '\0';
82: else
83: while ((ch = getchar()) != '\n' && ch != EOF);
1.10 deraadt 84: for (l = strlen(buf); l > 0 && isspace(buf[l - 1]); l--)
1.1 millert 85: ;
86: buf[l] = '\0';
87: if (buf[0] == '\0')
88: continue;
89: if (strncmp(buf, "LANG=", 5) == 0) {
90: (void) setlocale(LC_ALL, buf + 5);
91: setnnames();
1.40 zhuk 92: if (!strcmp(buf + 5, "ru_RU.UTF-8") ||
93: !strcmp(buf + 5, "uk_UA.UTF-8") ||
1.45 tb 94: !strcmp(buf + 5, "by_BY.UTF-8")) {
1.15 mickey 95: bodun_maybe++;
1.17 mickey 96: bodun = 0;
1.43 mmcc 97: free(prefix);
1.17 mickey 98: prefix = NULL;
1.15 mickey 99: } else
100: bodun_maybe = 0;
1.1 millert 101: continue;
1.27 mickey 102: } else if (strncmp(buf, "CALENDAR=", 9) == 0) {
103: char *ep;
104:
105: if (buf[9] == '\0')
106: calendar = 0;
107: else if (!strcasecmp(buf + 9, "julian")) {
108: calendar = JULIAN;
109: errno = 0;
110: julian = strtoul(buf + 14, &ep, 10);
111: if (buf[0] == '\0' || *ep != '\0')
112: julian = 13;
113: if ((errno == ERANGE && julian == ULONG_MAX) ||
114: julian > 14)
115: errx(1, "Julian calendar offset is too large");
116: } else if (!strcasecmp(buf + 9, "gregorian"))
117: calendar = GREGORIAN;
118: else if (!strcasecmp(buf + 9, "lunar"))
119: calendar = LUNAR;
120: } else if (bodun_maybe && strncmp(buf, "BODUN=", 6) == 0) {
1.15 mickey 121: bodun++;
1.43 mmcc 122: free(prefix);
1.17 mickey 123: if ((prefix = strdup(buf + 6)) == NULL)
124: err(1, NULL);
1.27 mickey 125: continue;
1.17 mickey 126: }
1.6 pjanzen 127: /* User defined names for special events */
128: if ((p = strchr(buf, '='))) {
129: for (i = 0; i < NUMEV; i++) {
1.31 deraadt 130: if (strncasecmp(buf, spev[i].name,
131: spev[i].nlen) == 0 &&
132: (p - buf == spev[i].nlen) &&
133: buf[spev[i].nlen + 1]) {
134: p++;
1.43 mmcc 135: free(spev[i].uname);
1.31 deraadt 136: if ((spev[i].uname = strdup(p)) == NULL)
137: err(1, NULL);
138: spev[i].ulen = strlen(p);
139: i = NUMEV + 1;
140: }
1.6 pjanzen 141: }
1.31 deraadt 142: if (i > NUMEV)
143: continue;
1.1 millert 144: }
145: if (buf[0] != '\t') {
1.15 mickey 146: printing = (m = isnow(buf, bodun)) ? 1 : 0;
1.6 pjanzen 147: if ((p = strchr(buf, '\t')) == NULL) {
148: printing = 0;
1.1 millert 149: continue;
1.6 pjanzen 150: }
1.5 pjanzen 151: /* Need the following to catch hardwired "variable"
152: * dates */
1.1 millert 153: if (p > buf && p[-1] == '*')
154: var = 1;
1.5 pjanzen 155: else
156: var = 0;
1.1 millert 157: if (printing) {
1.5 pjanzen 158: struct match *foo;
1.41 zhuk 159:
1.6 pjanzen 160: ev1 = NULL;
1.5 pjanzen 161: while (m) {
1.31 deraadt 162: cur_evt = malloc(sizeof(struct event));
163: if (cur_evt == NULL)
164: err(1, NULL);
1.41 zhuk 165:
1.31 deraadt 166: cur_evt->when = m->when;
167: snprintf(cur_evt->print_date,
168: sizeof(cur_evt->print_date), "%s%c",
169: m->print_date, (var + m->var) ? '*' : ' ');
170: if (ev1) {
171: cur_evt->desc = ev1->desc;
172: cur_evt->ldesc = NULL;
173: } else {
174: if (m->bodun && prefix) {
175: if (asprintf(&cur_evt->ldesc,
176: "\t%s %s", prefix,
177: p + 1) == -1)
178: err(1, NULL);
179: } else if ((cur_evt->ldesc =
180: strdup(p)) == NULL)
1.26 tom 181: err(1, NULL);
1.31 deraadt 182: cur_evt->desc = &(cur_evt->ldesc);
183: ev1 = cur_evt;
184: }
185: insert(&events, cur_evt);
186: foo = m;
187: m = m->next;
188: free(foo);
1.5 pjanzen 189: }
1.1 millert 190: }
1.30 deraadt 191: } else if (printing) {
1.32 moritz 192: if (asprintf(&p, "%s\n%s", ev1->ldesc,
1.30 deraadt 193: buf) == -1)
1.11 pjanzen 194: err(1, NULL);
1.32 moritz 195: free(ev1->ldesc);
196: ev1->ldesc = p;
1.5 pjanzen 197: }
198: }
199: tmp = events;
200: while (tmp) {
1.6 pjanzen 201: (void)fprintf(fp, "%s%s\n", tmp->print_date, *(tmp->desc));
202: tmp = tmp->next;
203: }
204: tmp = events;
205: while (tmp) {
1.5 pjanzen 206: events = tmp;
1.43 mmcc 207: free(tmp->ldesc);
1.5 pjanzen 208: tmp = tmp->next;
209: free(events);
1.1 millert 210: }
211: closecal(fp);
212: }
213:
214: int
1.31 deraadt 215: getfield(char *p, char **endp, int *flags)
1.1 millert 216: {
1.6 pjanzen 217: int val, var, i;
1.1 millert 218: char *start, savech;
219:
1.36 deraadt 220: for (; !isdigit((unsigned char)*p) && !isalpha((unsigned char)*p) &&
221: *p != '*' && *p != '\t'; ++p)
1.1 millert 222: ;
1.6 pjanzen 223: if (*p == '*') { /* `*' is every month */
1.1 millert 224: *flags |= F_ISMONTH;
225: *endp = p+1;
1.6 pjanzen 226: return (-1); /* means 'every month' */
1.1 millert 227: }
1.36 deraadt 228: if (isdigit((unsigned char)*p)) {
1.1 millert 229: val = strtol(p, &p, 10); /* if 0, it's failure */
1.36 deraadt 230: for (; !isdigit((unsigned char)*p) &&
231: !isalpha((unsigned char)*p) && *p != '*'; ++p)
1.1 millert 232: ;
233: *endp = p;
234: return (val);
235: }
1.36 deraadt 236: for (start = p; isalpha((unsigned char)*++p);)
1.1 millert 237: ;
238:
239: /* Sunday-1 */
240: if (*p == '+' || *p == '-')
1.36 deraadt 241: for(; isdigit((unsigned char)*++p); )
1.31 deraadt 242: ;
1.1 millert 243:
244: savech = *p;
245: *p = '\0';
246:
247: /* Month */
248: if ((val = getmonth(start)) != 0)
249: *flags |= F_ISMONTH;
250:
251: /* Day */
252: else if ((val = getday(start)) != 0) {
1.31 deraadt 253: *flags |= F_ISDAY;
1.1 millert 254:
1.31 deraadt 255: /* variable weekday */
256: if ((var = getdayvar(start)) != 0) {
257: if (var <= 5 && var >= -4)
258: val += var * 10;
1.1 millert 259: #ifdef DEBUG
1.31 deraadt 260: printf("var: %d\n", var);
1.1 millert 261: #endif
1.31 deraadt 262: }
1.1 millert 263: }
264:
1.6 pjanzen 265: /* Try specials (Easter, Paskha, ...) */
1.1 millert 266: else {
1.6 pjanzen 267: for (i = 0; i < NUMEV; i++) {
268: if (strncasecmp(start, spev[i].name, spev[i].nlen) == 0) {
269: start += spev[i].nlen;
270: val = i + 1;
271: i = NUMEV + 1;
272: } else if (spev[i].uname != NULL &&
273: strncasecmp(start, spev[i].uname, spev[i].ulen) == 0) {
274: start += spev[i].ulen;
275: val = i + 1;
276: i = NUMEV + 1;
277: }
278: }
279: if (i > NUMEV) {
1.39 deraadt 280: const char *errstr;
281:
282: switch (*start) {
1.6 pjanzen 283: case '-':
284: case '+':
1.39 deraadt 285: var = strtonum(start + 1, 0, 365, &errstr);
286: if (errstr)
1.31 deraadt 287: return (0); /* Someone is just being silly */
1.39 deraadt 288: if (*start == '-')
289: var = -var;
1.31 deraadt 290: val += (NUMEV + 1) * var;
291: /* We add one to the matching event and multiply by
292: * (NUMEV + 1) so as not to return 0 if there's a match.
293: * val will overflow if there is an obscenely large
294: * number of special events. */
295: break;
1.6 pjanzen 296: }
1.41 zhuk 297: *flags |= F_SPECIAL;
1.6 pjanzen 298: }
299: if (!(*flags & F_SPECIAL)) {
1.31 deraadt 300: /* undefined rest */
1.6 pjanzen 301: *p = savech;
302: return (0);
303: }
1.1 millert 304: }
1.36 deraadt 305: for (*p = savech; !isdigit((unsigned char)*p) &&
306: !isalpha((unsigned char)*p) && *p != '*' && *p != '\t'; ++p)
1.1 millert 307: ;
308: *endp = p;
309: return (val);
310: }
311:
1.10 deraadt 312:
1.1 millert 313: FILE *
1.20 vincent 314: opencal(void)
1.1 millert 315: {
1.20 vincent 316: int pdes[2], fdin;
317: struct stat st;
1.1 millert 318:
319: /* open up calendar file as stdin */
1.20 vincent 320: if ((fdin = open(calendarFile, O_RDONLY)) == -1 ||
321: fstat(fdin, &st) == -1 || !S_ISREG(st.st_mode)) {
1.13 pjanzen 322: if (!doall) {
1.9 millert 323: char *home = getenv("HOME");
324: if (home == NULL || *home == '\0')
325: errx(1, "cannot get home directory");
1.10 deraadt 326: if (!(chdir(home) == 0 &&
327: chdir(calendarHome) == 0 &&
1.14 pjanzen 328: (fdin = open(calendarFile, O_RDONLY)) != -1))
1.48 tedu 329: errx(1, "no calendar file: \"%s\" or \"~/%s/%s\"",
1.2 millert 330: calendarFile, calendarHome, calendarFile);
1.1 millert 331: }
332: }
1.20 vincent 333:
1.49 deraadt 334: if (pipe(pdes) == -1) {
1.44 jsg 335: close(fdin);
1.1 millert 336: return (NULL);
1.44 jsg 337: }
1.1 millert 338: switch (vfork()) {
339: case -1: /* error */
340: (void)close(pdes[0]);
341: (void)close(pdes[1]);
1.44 jsg 342: close(fdin);
1.1 millert 343: return (NULL);
344: case 0:
1.10 deraadt 345: dup2(fdin, STDIN_FILENO);
346: /* child -- set stdout to pipe input */
1.1 millert 347: if (pdes[1] != STDOUT_FILENO) {
348: (void)dup2(pdes[1], STDOUT_FILENO);
349: (void)close(pdes[1]);
350: }
351: (void)close(pdes[0]);
1.41 zhuk 352: /*
1.20 vincent 353: * Set stderr to /dev/null. Necessary so that cron does not
1.13 pjanzen 354: * wait for cpp to finish if it's running calendar -a.
355: */
356: if (doall) {
357: int fderr;
1.50 ! deraadt 358: fderr = open(_PATH_DEVNULL, O_WRONLY);
1.13 pjanzen 359: if (fderr == -1)
360: _exit(0);
361: (void)dup2(fderr, STDERR_FILENO);
362: (void)close(fderr);
363: }
1.29 otto 364: execl(_PATH_CPP, "cpp", "-traditional", "-undef", "-U__GNUC__",
365: "-P", "-I.", _PATH_INCLUDE, (char *)NULL);
1.1 millert 366: warn(_PATH_CPP);
367: _exit(1);
368: }
369: /* parent -- set stdin to pipe output */
370: (void)dup2(pdes[0], STDIN_FILENO);
371: (void)close(pdes[0]);
372: (void)close(pdes[1]);
373:
374: /* not reading all calendar files, just set output to stdout */
375: if (!doall)
376: return (stdout);
377:
378: /* set output to a temporary file, so if no output don't send mail */
1.13 pjanzen 379: return(tmpfile());
1.1 millert 380: }
381:
382: void
1.31 deraadt 383: closecal(FILE *fp)
1.1 millert 384: {
385: struct stat sbuf;
386: int nread, pdes[2], status;
387: char buf[1024];
1.47 krw 388: pid_t pid = -1;
1.1 millert 389:
390: if (!doall)
391: return;
392:
393: (void)rewind(fp);
394: if (fstat(fileno(fp), &sbuf) || !sbuf.st_size)
395: goto done;
1.49 deraadt 396: if (pipe(pdes) == -1)
1.1 millert 397: goto done;
1.46 deraadt 398: switch ((pid = vfork())) {
1.1 millert 399: case -1: /* error */
400: (void)close(pdes[0]);
401: (void)close(pdes[1]);
402: goto done;
403: case 0:
404: /* child -- set stdin to pipe output */
405: if (pdes[0] != STDIN_FILENO) {
406: (void)dup2(pdes[0], STDIN_FILENO);
407: (void)close(pdes[0]);
408: }
409: (void)close(pdes[1]);
410: execl(_PATH_SENDMAIL, "sendmail", "-i", "-t", "-F",
1.12 deraadt 411: "\"Reminder Service\"", (char *)NULL);
1.1 millert 412: warn(_PATH_SENDMAIL);
413: _exit(1);
414: }
415: /* parent -- write to pipe input */
416: (void)close(pdes[0]);
417:
418: header[1].iov_base = header[3].iov_base = pw->pw_name;
419: header[1].iov_len = header[3].iov_len = strlen(pw->pw_name);
1.33 deraadt 420: writev(pdes[1], header, 8);
1.1 millert 421: while ((nread = read(fileno(fp), buf, sizeof(buf))) > 0)
422: (void)write(pdes[1], buf, nread);
423: (void)close(pdes[1]);
424: done: (void)fclose(fp);
1.47 krw 425: if (pid != -1) {
426: while (waitpid(pid, &status, 0) == -1) {
427: if (errno != EINTR)
428: break;
429: }
1.46 deraadt 430: }
1.5 pjanzen 431: }
432:
433:
434: void
1.31 deraadt 435: insert(struct event **head, struct event *cur_evt)
1.5 pjanzen 436: {
437: struct event *tmp, *tmp2;
438:
439: if (*head) {
440: /* Insert this one in order */
441: tmp = *head;
442: tmp2 = NULL;
443: while (tmp->next &&
444: tmp->when <= cur_evt->when) {
445: tmp2 = tmp;
446: tmp = tmp->next;
447: }
448: if (tmp->when > cur_evt->when) {
449: cur_evt->next = tmp;
450: if (tmp2)
451: tmp2->next = cur_evt;
452: else
453: *head = cur_evt;
454: } else {
455: cur_evt->next = tmp->next;
456: tmp->next = cur_evt;
457: }
458: } else {
459: *head = cur_evt;
460: cur_evt->next = NULL;
461: }
1.1 millert 462: }