import calendar

1 files changed, 455 insertions, 0 deletions

diff --git a/src/usr.bin/calendar/io.c b/src/usr.bin/calendar/io.c
new file mode 100644
index 0000000..1d6ef58
--- /dev/null
+++ b/src/usr.bin/calendar/io.c
@@ -0,0 +1,455 @@
+/*	$OpenBSD: io.c,v 1.36 2013/11/26 13:18:53 deraadt Exp $	*/
+
+/*
+ * Copyright (c) 1989, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/param.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/uio.h>
+#include <sys/wait.h>
+
+#include <ctype.h>
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <locale.h>
+#include <pwd.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <tzfile.h>
+#include <unistd.h>
+
+#include "pathnames.h"
+#include "calendar.h"
+
+
+struct iovec header[] = {
+	{ "From: ", 6 },
+	{ NULL, 0 },
+	{ " (Reminder Service)\nTo: ", 24 },
+	{ NULL, 0 },
+	{ "\nSubject: ", 10 },
+	{ NULL, 0 },
+	{ "'s Calendar\nPrecedence: bulk\n",  29 },
+	{ "Auto-Submitted: auto-generated\n\n", 32 },
+};
+
+
+void
+cal(void)
+{
+	int ch, l, i, bodun = 0, bodun_maybe = 0, var, printing;
+	struct event *events, *cur_evt, *ev1, *tmp;
+	char buf[2048 + 1], *prefix = NULL, *p;
+	struct match *m;
+	FILE *fp;
+
+	events = NULL;
+	cur_evt = NULL;
+	if ((fp = opencal()) == NULL)
+		return;
+	for (printing = 0; fgets(buf, sizeof(buf), stdin) != NULL;) {
+		if ((p = strchr(buf, '\n')) != NULL)
+			*p = '\0';
+		else
+			while ((ch = getchar()) != '\n' && ch != EOF);
+		for (l = strlen(buf); l > 0 && isspace(buf[l - 1]); l--)
+			;
+		buf[l] = '\0';
+		if (buf[0] == '\0')
+			continue;
+		if (strncmp(buf, "LANG=", 5) == 0) {
+			(void) setlocale(LC_ALL, buf + 5);
+			setnnames();
+			if (!strcmp(buf + 5, "ru_RU.KOI8-R") ||
+			    !strcmp(buf + 5, "uk_UA.KOI8-U") ||
+			    !strcmp(buf + 5, "by_BY.KOI8-B")) {
+				bodun_maybe++;
+				bodun = 0;
+				if (prefix)
+					free(prefix);
+				prefix = NULL;
+			} else
+				bodun_maybe = 0;
+			continue;
+		} else if (strncmp(buf, "CALENDAR=", 9) == 0) {
+			char *ep;
+
+			if (buf[9] == '\0')
+				calendar = 0;
+			else if (!strcasecmp(buf + 9, "julian")) {
+				calendar = JULIAN;
+				errno = 0;
+				julian = strtoul(buf + 14, &ep, 10);
+				if (buf[0] == '\0' || *ep != '\0')
+					julian = 13;
+				if ((errno == ERANGE && julian == ULONG_MAX) ||
+				    julian > 14)
+					errx(1, "Julian calendar offset is too large");
+			} else if (!strcasecmp(buf + 9, "gregorian"))
+				calendar = GREGORIAN;
+			else if (!strcasecmp(buf + 9, "lunar"))
+				calendar = LUNAR;
+		} else if (bodun_maybe && strncmp(buf, "BODUN=", 6) == 0) {
+			bodun++;
+			if (prefix)
+				free(prefix);
+			if ((prefix = strdup(buf + 6)) == NULL)
+				err(1, NULL);
+			continue;
+		}
+		/* User defined names for special events */
+		if ((p = strchr(buf, '='))) {
+			for (i = 0; i < NUMEV; i++) {
+				if (strncasecmp(buf, spev[i].name,
+				    spev[i].nlen) == 0 &&
+				    (p - buf == spev[i].nlen) &&
+				    buf[spev[i].nlen + 1]) {
+					p++;
+					if (spev[i].uname != NULL)
+						free(spev[i].uname);
+					if ((spev[i].uname = strdup(p)) == NULL)
+						err(1, NULL);
+					spev[i].ulen = strlen(p);
+					i = NUMEV + 1;
+				}
+			}
+			if (i > NUMEV)
+				continue;
+		}
+		if (buf[0] != '\t') {
+			printing = (m = isnow(buf, bodun)) ? 1 : 0;
+			if ((p = strchr(buf, '\t')) == NULL) {
+				printing = 0;
+				continue;
+			}
+			/* Need the following to catch hardwired "variable"
+			 * dates */
+			if (p > buf && p[-1] == '*')
+				var = 1;
+			else
+				var = 0;
+			if (printing) {
+				struct match *foo;
+				
+				ev1 = NULL;
+				while (m) {
+					cur_evt = malloc(sizeof(struct event));
+					if (cur_evt == NULL)
+						err(1, NULL);
+	
+					cur_evt->when = m->when;
+					snprintf(cur_evt->print_date,
+					    sizeof(cur_evt->print_date), "%s%c",
+					    m->print_date, (var + m->var) ? '*' : ' ');
+					if (ev1) {
+						cur_evt->desc = ev1->desc;
+						cur_evt->ldesc = NULL;
+					} else {
+						if (m->bodun && prefix) {
+							if (asprintf(&cur_evt->ldesc,
+							    "\t%s %s", prefix,
+							    p + 1) == -1)
+								err(1, NULL);
+						} else if ((cur_evt->ldesc =
+						    strdup(p)) == NULL)
+							err(1, NULL);
+						cur_evt->desc = &(cur_evt->ldesc);
+						ev1 = cur_evt;
+					}
+					insert(&events, cur_evt);
+					foo = m;
+					m = m->next;
+					free(foo);
+				}
+			}
+		} else if (printing) {
+			if (asprintf(&p, "%s\n%s", ev1->ldesc,
+			    buf) == -1)
+				err(1, NULL);
+			free(ev1->ldesc);
+			ev1->ldesc = p;
+		}
+	}
+	tmp = events;
+	while (tmp) {
+		(void)fprintf(fp, "%s%s\n", tmp->print_date, *(tmp->desc));
+		tmp = tmp->next;
+	}
+	tmp = events;
+	while (tmp) {
+		events = tmp;
+		if (tmp->ldesc)
+			free(tmp->ldesc);
+		tmp = tmp->next;
+		free(events);
+	}
+	closecal(fp);
+}
+
+int
+getfield(char *p, char **endp, int *flags)
+{
+	int val, var, i;
+	char *start, savech;
+
+	for (; !isdigit((unsigned char)*p) && !isalpha((unsigned char)*p) &&
+	    *p != '*' && *p != '\t'; ++p)
+		;
+	if (*p == '*') {			/* `*' is every month */
+		*flags |= F_ISMONTH;
+		*endp = p+1;
+		return (-1);	/* means 'every month' */
+	}
+	if (isdigit((unsigned char)*p)) {
+		val = strtol(p, &p, 10);	/* if 0, it's failure */
+		for (; !isdigit((unsigned char)*p) &&
+		    !isalpha((unsigned char)*p) && *p != '*'; ++p)
+			;
+		*endp = p;
+		return (val);
+	}
+	for (start = p; isalpha((unsigned char)*++p);)
+		;
+
+	/* Sunday-1 */
+	if (*p == '+' || *p == '-')
+		for(; isdigit((unsigned char)*++p); )
+			;
+
+	savech = *p;
+	*p = '\0';
+
+	/* Month */
+	if ((val = getmonth(start)) != 0)
+		*flags |= F_ISMONTH;
+
+	/* Day */
+	else if ((val = getday(start)) != 0) {
+		*flags |= F_ISDAY;
+
+		/* variable weekday */
+		if ((var = getdayvar(start)) != 0) {
+			if (var <= 5 && var >= -4)
+				val += var * 10;
+#ifdef DEBUG
+			printf("var: %d\n", var);
+#endif
+		}
+	}
+
+	/* Try specials (Easter, Paskha, ...) */
+	else {
+		for (i = 0; i < NUMEV; i++) {
+			if (strncasecmp(start, spev[i].name, spev[i].nlen) == 0) {
+				start += spev[i].nlen;
+				val = i + 1;
+				i = NUMEV + 1;
+			} else if (spev[i].uname != NULL &&
+			    strncasecmp(start, spev[i].uname, spev[i].ulen) == 0) {
+				start += spev[i].ulen;
+				val = i + 1;
+				i = NUMEV + 1;
+			}
+		}
+		if (i > NUMEV) {
+			switch(*start) {
+			case '-':
+			case '+':
+				var = atoi(start);
+				if (var > 365 || var < -365)
+					return (0); /* Someone is just being silly */
+				val += (NUMEV + 1) * var;
+				/* We add one to the matching event and multiply by
+				 * (NUMEV + 1) so as not to return 0 if there's a match.
+				 * val will overflow if there is an obscenely large
+				 * number of special events. */
+				break;
+			}
+			*flags |= F_SPECIAL;	
+		}
+		if (!(*flags & F_SPECIAL)) {
+			/* undefined rest */
+			*p = savech;
+			return (0);
+		}
+	}
+	for (*p = savech; !isdigit((unsigned char)*p) &&
+	    !isalpha((unsigned char)*p) && *p != '*' && *p != '\t'; ++p)
+		;
+	*endp = p;
+	return (val);
+}
+
+
+FILE *
+opencal(void)
+{
+	int pdes[2], fdin;
+	struct stat st;
+
+	/* open up calendar file as stdin */
+	if ((fdin = open(calendarFile, O_RDONLY)) == -1 ||
+	    fstat(fdin, &st) == -1 || !S_ISREG(st.st_mode)) {
+		if (!doall) {
+			char *home = getenv("HOME");
+			if (home == NULL || *home == '\0')
+				errx(1, "cannot get home directory");
+			if (!(chdir(home) == 0 &&
+			    chdir(calendarHome) == 0 &&
+			    (fdin = open(calendarFile, O_RDONLY)) != -1))
+				errx(1, "no calendar file: ``%s'' or ``~/%s/%s''",
+				    calendarFile, calendarHome, calendarFile);
+		}
+	}
+
+	if (pipe(pdes) < 0)
+		return (NULL);
+	switch (vfork()) {
+	case -1:			/* error */
+		(void)close(pdes[0]);
+		(void)close(pdes[1]);
+		return (NULL);
+	case 0:
+		dup2(fdin, STDIN_FILENO);
+		/* child -- set stdout to pipe input */
+		if (pdes[1] != STDOUT_FILENO) {
+			(void)dup2(pdes[1], STDOUT_FILENO);
+			(void)close(pdes[1]);
+		}
+		(void)close(pdes[0]);
+		/* 
+		 * Set stderr to /dev/null.  Necessary so that cron does not
+		 * wait for cpp to finish if it's running calendar -a.
+		 */
+		if (doall) {
+			int fderr;
+			fderr = open(_PATH_DEVNULL, O_WRONLY, 0);
+			if (fderr == -1)
+				_exit(0);
+			(void)dup2(fderr, STDERR_FILENO);
+			(void)close(fderr);
+		}
+		execl(_PATH_CPP, "cpp", "-traditional", "-undef", "-U__GNUC__",
+		    "-P", "-I.", _PATH_INCLUDE, (char *)NULL);
+		warn(_PATH_CPP);
+		_exit(1);
+	}
+	/* parent -- set stdin to pipe output */
+	(void)dup2(pdes[0], STDIN_FILENO);
+	(void)close(pdes[0]);
+	(void)close(pdes[1]);
+
+	/* not reading all calendar files, just set output to stdout */
+	if (!doall)
+		return (stdout);
+
+	/* set output to a temporary file, so if no output don't send mail */
+	return(tmpfile());
+}
+
+void
+closecal(FILE *fp)
+{
+	struct stat sbuf;
+	int nread, pdes[2], status;
+	char buf[1024];
+
+	if (!doall)
+		return;
+
+	(void)rewind(fp);
+	if (fstat(fileno(fp), &sbuf) || !sbuf.st_size)
+		goto done;
+	if (pipe(pdes) < 0)
+		goto done;
+	switch (vfork()) {
+	case -1:			/* error */
+		(void)close(pdes[0]);
+		(void)close(pdes[1]);
+		goto done;
+	case 0:
+		/* child -- set stdin to pipe output */
+		if (pdes[0] != STDIN_FILENO) {
+			(void)dup2(pdes[0], STDIN_FILENO);
+			(void)close(pdes[0]);
+		}
+		(void)close(pdes[1]);
+		execl(_PATH_SENDMAIL, "sendmail", "-i", "-t", "-F",
+		    "\"Reminder Service\"", (char *)NULL);
+		warn(_PATH_SENDMAIL);
+		_exit(1);
+	}
+	/* parent -- write to pipe input */
+	(void)close(pdes[0]);
+
+	header[1].iov_base = header[3].iov_base = pw->pw_name;
+	header[1].iov_len = header[3].iov_len = strlen(pw->pw_name);
+	writev(pdes[1], header, 8);
+	while ((nread = read(fileno(fp), buf, sizeof(buf))) > 0)
+		(void)write(pdes[1], buf, nread);
+	(void)close(pdes[1]);
+done:	(void)fclose(fp);
+	while (wait(&status) >= 0)
+		;
+}
+
+
+void
+insert(struct event **head, struct event *cur_evt)
+{
+	struct event *tmp, *tmp2;
+
+	if (*head) {
+		/* Insert this one in order */
+		tmp = *head;
+		tmp2 = NULL;
+		while (tmp->next &&
+		    tmp->when <= cur_evt->when) {
+			tmp2 = tmp;
+			tmp = tmp->next;
+		}
+		if (tmp->when > cur_evt->when) {
+			cur_evt->next = tmp;
+			if (tmp2)
+				tmp2->next = cur_evt;
+			else
+				*head = cur_evt;
+		} else {
+			cur_evt->next = tmp->next;
+			tmp->next = cur_evt;
+		}
+	} else {
+		*head = cur_evt;
+		cur_evt->next = NULL;
+	}
+}