Annotation of src/usr.bin/calendar/io.c, Revision 1.39
1.39 ! deraadt 1: /* $OpenBSD: io.c,v 1.38 2015/03/15 00:41:28 millert 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();
1.15 mickey 92: if (!strcmp(buf + 5, "ru_RU.KOI8-R") ||
93: !strcmp(buf + 5, "uk_UA.KOI8-U") ||
94: !strcmp(buf + 5, "by_BY.KOI8-B")) {
95: bodun_maybe++;
1.17 mickey 96: bodun = 0;
97: if (prefix)
98: free(prefix);
99: prefix = NULL;
1.15 mickey 100: } else
101: bodun_maybe = 0;
1.1 millert 102: continue;
1.27 mickey 103: } else if (strncmp(buf, "CALENDAR=", 9) == 0) {
104: char *ep;
105:
106: if (buf[9] == '\0')
107: calendar = 0;
108: else if (!strcasecmp(buf + 9, "julian")) {
109: calendar = JULIAN;
110: errno = 0;
111: julian = strtoul(buf + 14, &ep, 10);
112: if (buf[0] == '\0' || *ep != '\0')
113: julian = 13;
114: if ((errno == ERANGE && julian == ULONG_MAX) ||
115: julian > 14)
116: errx(1, "Julian calendar offset is too large");
117: } else if (!strcasecmp(buf + 9, "gregorian"))
118: calendar = GREGORIAN;
119: else if (!strcasecmp(buf + 9, "lunar"))
120: calendar = LUNAR;
121: } else if (bodun_maybe && strncmp(buf, "BODUN=", 6) == 0) {
1.15 mickey 122: bodun++;
1.17 mickey 123: if (prefix)
124: free(prefix);
125: if ((prefix = strdup(buf + 6)) == NULL)
126: err(1, NULL);
1.27 mickey 127: continue;
1.17 mickey 128: }
1.6 pjanzen 129: /* User defined names for special events */
130: if ((p = strchr(buf, '='))) {
131: for (i = 0; i < NUMEV; i++) {
1.31 deraadt 132: if (strncasecmp(buf, spev[i].name,
133: spev[i].nlen) == 0 &&
134: (p - buf == spev[i].nlen) &&
135: buf[spev[i].nlen + 1]) {
136: p++;
137: if (spev[i].uname != NULL)
138: free(spev[i].uname);
139: if ((spev[i].uname = strdup(p)) == NULL)
140: err(1, NULL);
141: spev[i].ulen = strlen(p);
142: i = NUMEV + 1;
143: }
1.6 pjanzen 144: }
1.31 deraadt 145: if (i > NUMEV)
146: continue;
1.1 millert 147: }
148: if (buf[0] != '\t') {
1.15 mickey 149: printing = (m = isnow(buf, bodun)) ? 1 : 0;
1.6 pjanzen 150: if ((p = strchr(buf, '\t')) == NULL) {
151: printing = 0;
1.1 millert 152: continue;
1.6 pjanzen 153: }
1.5 pjanzen 154: /* Need the following to catch hardwired "variable"
155: * dates */
1.1 millert 156: if (p > buf && p[-1] == '*')
157: var = 1;
1.5 pjanzen 158: else
159: var = 0;
1.1 millert 160: if (printing) {
1.5 pjanzen 161: struct match *foo;
162:
1.6 pjanzen 163: ev1 = NULL;
1.5 pjanzen 164: while (m) {
1.31 deraadt 165: cur_evt = malloc(sizeof(struct event));
166: if (cur_evt == NULL)
167: err(1, NULL);
168:
169: cur_evt->when = m->when;
170: snprintf(cur_evt->print_date,
171: sizeof(cur_evt->print_date), "%s%c",
172: m->print_date, (var + m->var) ? '*' : ' ');
173: if (ev1) {
174: cur_evt->desc = ev1->desc;
175: cur_evt->ldesc = NULL;
176: } else {
177: if (m->bodun && prefix) {
178: if (asprintf(&cur_evt->ldesc,
179: "\t%s %s", prefix,
180: p + 1) == -1)
181: err(1, NULL);
182: } else if ((cur_evt->ldesc =
183: strdup(p)) == NULL)
1.26 tom 184: err(1, NULL);
1.31 deraadt 185: cur_evt->desc = &(cur_evt->ldesc);
186: ev1 = cur_evt;
187: }
188: insert(&events, cur_evt);
189: foo = m;
190: m = m->next;
191: free(foo);
1.5 pjanzen 192: }
1.1 millert 193: }
1.30 deraadt 194: } else if (printing) {
1.32 moritz 195: if (asprintf(&p, "%s\n%s", ev1->ldesc,
1.30 deraadt 196: buf) == -1)
1.11 pjanzen 197: err(1, NULL);
1.32 moritz 198: free(ev1->ldesc);
199: ev1->ldesc = p;
1.5 pjanzen 200: }
201: }
202: tmp = events;
203: while (tmp) {
1.6 pjanzen 204: (void)fprintf(fp, "%s%s\n", tmp->print_date, *(tmp->desc));
205: tmp = tmp->next;
206: }
207: tmp = events;
208: while (tmp) {
1.5 pjanzen 209: events = tmp;
1.6 pjanzen 210: if (tmp->ldesc)
211: free(tmp->ldesc);
1.5 pjanzen 212: tmp = tmp->next;
213: free(events);
1.1 millert 214: }
215: closecal(fp);
216: }
217:
218: int
1.31 deraadt 219: getfield(char *p, char **endp, int *flags)
1.1 millert 220: {
1.6 pjanzen 221: int val, var, i;
1.1 millert 222: char *start, savech;
223:
1.36 deraadt 224: for (; !isdigit((unsigned char)*p) && !isalpha((unsigned char)*p) &&
225: *p != '*' && *p != '\t'; ++p)
1.1 millert 226: ;
1.6 pjanzen 227: if (*p == '*') { /* `*' is every month */
1.1 millert 228: *flags |= F_ISMONTH;
229: *endp = p+1;
1.6 pjanzen 230: return (-1); /* means 'every month' */
1.1 millert 231: }
1.36 deraadt 232: if (isdigit((unsigned char)*p)) {
1.1 millert 233: val = strtol(p, &p, 10); /* if 0, it's failure */
1.36 deraadt 234: for (; !isdigit((unsigned char)*p) &&
235: !isalpha((unsigned char)*p) && *p != '*'; ++p)
1.1 millert 236: ;
237: *endp = p;
238: return (val);
239: }
1.36 deraadt 240: for (start = p; isalpha((unsigned char)*++p);)
1.1 millert 241: ;
242:
243: /* Sunday-1 */
244: if (*p == '+' || *p == '-')
1.36 deraadt 245: for(; isdigit((unsigned char)*++p); )
1.31 deraadt 246: ;
1.1 millert 247:
248: savech = *p;
249: *p = '\0';
250:
251: /* Month */
252: if ((val = getmonth(start)) != 0)
253: *flags |= F_ISMONTH;
254:
255: /* Day */
256: else if ((val = getday(start)) != 0) {
1.31 deraadt 257: *flags |= F_ISDAY;
1.1 millert 258:
1.31 deraadt 259: /* variable weekday */
260: if ((var = getdayvar(start)) != 0) {
261: if (var <= 5 && var >= -4)
262: val += var * 10;
1.1 millert 263: #ifdef DEBUG
1.31 deraadt 264: printf("var: %d\n", var);
1.1 millert 265: #endif
1.31 deraadt 266: }
1.1 millert 267: }
268:
1.6 pjanzen 269: /* Try specials (Easter, Paskha, ...) */
1.1 millert 270: else {
1.6 pjanzen 271: for (i = 0; i < NUMEV; i++) {
272: if (strncasecmp(start, spev[i].name, spev[i].nlen) == 0) {
273: start += spev[i].nlen;
274: val = i + 1;
275: i = NUMEV + 1;
276: } else if (spev[i].uname != NULL &&
277: strncasecmp(start, spev[i].uname, spev[i].ulen) == 0) {
278: start += spev[i].ulen;
279: val = i + 1;
280: i = NUMEV + 1;
281: }
282: }
283: if (i > NUMEV) {
1.39 ! deraadt 284: const char *errstr;
! 285:
! 286: switch (*start) {
1.6 pjanzen 287: case '-':
288: case '+':
1.39 ! deraadt 289: var = strtonum(start + 1, 0, 365, &errstr);
! 290: if (errstr)
1.31 deraadt 291: return (0); /* Someone is just being silly */
1.39 ! deraadt 292: if (*start == '-')
! 293: var = -var;
1.31 deraadt 294: val += (NUMEV + 1) * var;
295: /* We add one to the matching event and multiply by
296: * (NUMEV + 1) so as not to return 0 if there's a match.
297: * val will overflow if there is an obscenely large
298: * number of special events. */
299: break;
1.6 pjanzen 300: }
1.31 deraadt 301: *flags |= F_SPECIAL;
1.6 pjanzen 302: }
303: if (!(*flags & F_SPECIAL)) {
1.31 deraadt 304: /* undefined rest */
1.6 pjanzen 305: *p = savech;
306: return (0);
307: }
1.1 millert 308: }
1.36 deraadt 309: for (*p = savech; !isdigit((unsigned char)*p) &&
310: !isalpha((unsigned char)*p) && *p != '*' && *p != '\t'; ++p)
1.1 millert 311: ;
312: *endp = p;
313: return (val);
314: }
315:
1.10 deraadt 316:
1.1 millert 317: FILE *
1.20 vincent 318: opencal(void)
1.1 millert 319: {
1.20 vincent 320: int pdes[2], fdin;
321: struct stat st;
1.1 millert 322:
323: /* open up calendar file as stdin */
1.20 vincent 324: if ((fdin = open(calendarFile, O_RDONLY)) == -1 ||
325: fstat(fdin, &st) == -1 || !S_ISREG(st.st_mode)) {
1.13 pjanzen 326: if (!doall) {
1.9 millert 327: char *home = getenv("HOME");
328: if (home == NULL || *home == '\0')
329: errx(1, "cannot get home directory");
1.10 deraadt 330: if (!(chdir(home) == 0 &&
331: chdir(calendarHome) == 0 &&
1.14 pjanzen 332: (fdin = open(calendarFile, O_RDONLY)) != -1))
1.18 deraadt 333: errx(1, "no calendar file: ``%s'' or ``~/%s/%s''",
1.2 millert 334: calendarFile, calendarHome, calendarFile);
1.1 millert 335: }
336: }
1.20 vincent 337:
1.1 millert 338: if (pipe(pdes) < 0)
339: return (NULL);
340: switch (vfork()) {
341: case -1: /* error */
342: (void)close(pdes[0]);
343: (void)close(pdes[1]);
344: return (NULL);
345: case 0:
1.10 deraadt 346: dup2(fdin, STDIN_FILENO);
347: /* child -- set stdout to pipe input */
1.1 millert 348: if (pdes[1] != STDOUT_FILENO) {
349: (void)dup2(pdes[1], STDOUT_FILENO);
350: (void)close(pdes[1]);
351: }
352: (void)close(pdes[0]);
1.20 vincent 353: /*
354: * Set stderr to /dev/null. Necessary so that cron does not
1.13 pjanzen 355: * wait for cpp to finish if it's running calendar -a.
356: */
357: if (doall) {
358: int fderr;
359: fderr = open(_PATH_DEVNULL, O_WRONLY, 0);
360: if (fderr == -1)
361: _exit(0);
362: (void)dup2(fderr, STDERR_FILENO);
363: (void)close(fderr);
364: }
1.29 otto 365: execl(_PATH_CPP, "cpp", "-traditional", "-undef", "-U__GNUC__",
366: "-P", "-I.", _PATH_INCLUDE, (char *)NULL);
1.1 millert 367: warn(_PATH_CPP);
368: _exit(1);
369: }
370: /* parent -- set stdin to pipe output */
371: (void)dup2(pdes[0], STDIN_FILENO);
372: (void)close(pdes[0]);
373: (void)close(pdes[1]);
374:
375: /* not reading all calendar files, just set output to stdout */
376: if (!doall)
377: return (stdout);
378:
379: /* set output to a temporary file, so if no output don't send mail */
1.13 pjanzen 380: return(tmpfile());
1.1 millert 381: }
382:
383: void
1.31 deraadt 384: closecal(FILE *fp)
1.1 millert 385: {
386: struct stat sbuf;
387: int nread, pdes[2], status;
388: char buf[1024];
389:
390: if (!doall)
391: return;
392:
393: (void)rewind(fp);
394: if (fstat(fileno(fp), &sbuf) || !sbuf.st_size)
395: goto done;
396: if (pipe(pdes) < 0)
397: goto done;
398: switch (vfork()) {
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);
1.10 deraadt 425: while (wait(&status) >= 0)
426: ;
1.5 pjanzen 427: }
428:
429:
430: void
1.31 deraadt 431: insert(struct event **head, struct event *cur_evt)
1.5 pjanzen 432: {
433: struct event *tmp, *tmp2;
434:
435: if (*head) {
436: /* Insert this one in order */
437: tmp = *head;
438: tmp2 = NULL;
439: while (tmp->next &&
440: tmp->when <= cur_evt->when) {
441: tmp2 = tmp;
442: tmp = tmp->next;
443: }
444: if (tmp->when > cur_evt->when) {
445: cur_evt->next = tmp;
446: if (tmp2)
447: tmp2->next = cur_evt;
448: else
449: *head = cur_evt;
450: } else {
451: cur_evt->next = tmp->next;
452: tmp->next = cur_evt;
453: }
454: } else {
455: *head = cur_evt;
456: cur_evt->next = NULL;
457: }
1.1 millert 458: }