freebsd-dev/usr.bin/calendar/io.c
Mike Pritchard 544b5cb2f1 Change calendar to report the actual date for variable day events.
E.g. for Easter, and entries like "04/SunFirst" calendar will
now report:

04/05*	Good Friday (2 days before easter)
04/07*	First Sunday...

instead of:

Easter-2	Good Friday...
04/SunFirst	First Sunday...

I also modified the calendar files to use the variable day format
for a lot of events so that they will be reported correctly.
E.g. U.S. daylight savings time is now listed as:

04/SunFirst	Daylight savings time...

There are still a lot of wrong dates in there for some events
that move from year to year, but I don't have a good calendar handy
right now that I can use for reference.
1996-04-06 01:15:21 +00:00

283 lines
7.2 KiB
C

/*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*/
#ifndef lint
static char copyright[] =
"@(#) Copyright (c) 1989, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
static char sccsid[] = "@(#)calendar.c 8.3 (Berkeley) 3/25/94";
#endif /* not lint */
#include <sys/param.h>
#include <stdio.h>
#include <ctype.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <err.h>
#include <errno.h>
#include <string.h>
#include <sys/uio.h>
#include <sys/time.h>
#include <stdlib.h>
#include <pwd.h>
#include <sys/wait.h>
#include "pathnames.h"
#include "calendar.h"
char *calendarFile = "calendar"; /* default calendar file */
char *calendarHome = ".calendar"; /* HOME */
char *calendarNoMail = "nomail"; /* don't sent mail if this file exist */
struct iovec header[] = {
"From: ", 6,
NULL, 0,
" (Reminder Service)\nTo: ", 24,
NULL, 0,
"\nSubject: ", 10,
NULL, 0,
"'s Calendar\nPrecedence: bulk\n\n", 30,
};
void
cal()
{
register int printing;
register char *p;
FILE *fp;
int ch;
int month;
int day;
int var;
char buf[2048 + 1];
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);
if (buf[0] == '\0')
continue;
if (buf[0] != '\t') {
printing = isnow(buf, &month, &day, &var) ? 1 : 0;
if ((p = strchr(buf, '\t')) == NULL)
continue;
if (p > buf && p[-1] == '*')
var = 1;
if (printing)
(void)fprintf(fp, "%.2d/%.2d%c%s\n", month,
day, var ? '*' : ' ', p);
}
else if (printing)
fprintf(fp, "%s\n", buf);
}
closecal(fp);
}
int
getfield(p, endp, flags)
char *p, **endp;
int *flags;
{
int val, var;
char *start, savech;
for (; !isdigit(*p) && !isalpha(*p) && *p != '*'; ++p);
if (*p == '*') { /* `*' is current month */
*flags |= F_ISMONTH;
*endp = p+1;
return (tp->tm_mon + 1);
}
if (isdigit(*p)) {
val = strtol(p, &p, 10); /* if 0, it's failure */
for (; !isdigit(*p) && !isalpha(*p) && *p != '*'; ++p);
*endp = p;
return (val);
}
for (start = p; isalpha(*++p););
/* Sunday-1 */
if (*p == '+' || *p == '-')
for(; isdigit(*++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
}
}
/* Easter */
else if ((val = geteaster(start, tp->tm_year + 1900)) != 0)
*flags |= F_EASTER;
/* undefined rest */
else {
*p = savech;
return (0);
}
for (*p = savech; !isdigit(*p) && !isalpha(*p) && *p != '*'; ++p);
*endp = p;
return (val);
}
char path[MAXPATHLEN + 1];
FILE *
opencal()
{
int fd, pdes[2];
struct stat sbuf;
/* open up calendar file as stdin */
if (!freopen(calendarFile, "r", stdin)) {
if (doall) {
if (chdir(calendarHome) != 0)
return (NULL);
if (stat(calendarNoMail, &sbuf) == 0)
return (NULL);
if (!freopen(calendarFile, "r", stdin))
return (NULL);
} else {
chdir(getenv("HOME"));
if (!(chdir(calendarHome) == 0 &&
freopen(calendarFile, "r", stdin)))
errx(1, "no calendar file: ``%s'' or ``~/%s/%s\n", 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:
/* child -- stdin already setup, set stdout to pipe input */
if (pdes[1] != STDOUT_FILENO) {
(void)dup2(pdes[1], STDOUT_FILENO);
(void)close(pdes[1]);
}
(void)close(pdes[0]);
execl(_PATH_CPP, "cpp", "-P", "-I.", _PATH_INCLUDE, NULL);
(void)fprintf(stderr,
"calendar: execl: %s: %s.\n", _PATH_CPP, strerror(errno));
_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 */
(void)snprintf(path, sizeof(path), "%s/_calXXXXXX", _PATH_TMP);
if ((fd = mkstemp(path)) < 0)
return (NULL);
return (fdopen(fd, "w+"));
}
void
closecal(fp)
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\"", "-f", "root", NULL);
(void)fprintf(stderr,
"calendar: %s: %s.\n", _PATH_SENDMAIL, strerror(errno));
_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, 7);
while ((nread = read(fileno(fp), buf, sizeof(buf))) > 0)
(void)write(pdes[1], buf, nread);
(void)close(pdes[1]);
done: (void)fclose(fp);
(void)unlink(path);
while (wait(&status) >= 0);
}