388 lines
9.2 KiB
C
388 lines
9.2 KiB
C
/*
|
|
* Copyright (c) 1989 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
|
|
char copyright[] =
|
|
"@(#) Copyright (c) 1989 The Regents of the University of California.\n\
|
|
All rights reserved.\n";
|
|
#endif /* not lint */
|
|
|
|
#ifndef lint
|
|
/*static char sccsid[] = "from: @(#)calendar.c 4.11 (Berkeley) 10/12/90";*/
|
|
static char rcsid[] = "$Id: calendar.c,v 1.3 1994/01/05 13:13:00 cgd Exp $";
|
|
#endif /* not lint */
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/time.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/file.h>
|
|
#include <sys/uio.h>
|
|
#include <pwd.h>
|
|
#include <errno.h>
|
|
#include <tzfile.h>
|
|
#include <stdio.h>
|
|
#include <ctype.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include "pathnames.h"
|
|
|
|
extern int errno;
|
|
struct passwd *pw;
|
|
int doall;
|
|
|
|
main(argc, argv)
|
|
int argc;
|
|
char **argv;
|
|
{
|
|
extern int optind;
|
|
int ch;
|
|
|
|
while ((ch = getopt(argc, argv, "-a")) != EOF)
|
|
switch(ch) {
|
|
case '-': /* backward contemptible */
|
|
case 'a':
|
|
if (getuid()) {
|
|
(void)fprintf(stderr,
|
|
"calendar: %s\n", strerror(EPERM));
|
|
exit(1);
|
|
}
|
|
doall = 1;
|
|
break;
|
|
case '?':
|
|
default:
|
|
usage();
|
|
}
|
|
argc -= optind;
|
|
argv += optind;
|
|
|
|
if (argc)
|
|
usage();
|
|
|
|
settime();
|
|
if (doall)
|
|
while (pw = getpwent()) {
|
|
(void)setegid(pw->pw_gid);
|
|
(void)seteuid(pw->pw_uid);
|
|
if (!chdir(pw->pw_dir))
|
|
cal();
|
|
(void)seteuid(0);
|
|
}
|
|
else
|
|
cal();
|
|
exit(0);
|
|
}
|
|
|
|
cal()
|
|
{
|
|
register int printing;
|
|
register char *p;
|
|
FILE *fp, *opencal();
|
|
int ch;
|
|
char buf[2048 + 1];
|
|
|
|
if (!(fp = opencal()))
|
|
return;
|
|
for (printing = 0; fgets(buf, sizeof(buf), stdin);) {
|
|
if (p = index(buf, '\n'))
|
|
*p = '\0';
|
|
else
|
|
while ((ch = getchar()) != '\n' && ch != EOF);
|
|
if (buf[0] == '\0')
|
|
continue;
|
|
if (buf[0] != '\t')
|
|
printing = isnow(buf) ? 1 : 0;
|
|
if (printing)
|
|
(void)fprintf(fp, "%s\n", buf);
|
|
}
|
|
closecal(fp);
|
|
}
|
|
|
|
struct iovec header[] = {
|
|
"From: ", 6,
|
|
NULL, 0,
|
|
" (Reminder Service)\nTo: ", 24,
|
|
NULL, 0,
|
|
"\nSubject: ", 10,
|
|
NULL, 0,
|
|
"'s Calendar\nPrecedence: bulk\n\n", 30,
|
|
};
|
|
|
|
/* 1-based month, 0-based days, cumulative */
|
|
int daytab[][14] = {
|
|
0, -1, 30, 58, 89, 119, 150, 180, 211, 242, 272, 303, 333, 364,
|
|
0, -1, 30, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365,
|
|
};
|
|
struct tm *tp;
|
|
int *cumdays, offset, yrdays;
|
|
char dayname[10];
|
|
|
|
settime()
|
|
{
|
|
time_t now, time();
|
|
|
|
(void)time(&now);
|
|
tp = localtime(&now);
|
|
if (isleap(tp->tm_year + 1900)) {
|
|
yrdays = DAYSPERLYEAR;
|
|
cumdays = daytab[1];
|
|
} else {
|
|
yrdays = DAYSPERNYEAR;
|
|
cumdays = daytab[0];
|
|
}
|
|
/* Friday displays Monday's events */
|
|
offset = tp->tm_wday == 5 ? 3 : 1;
|
|
header[5].iov_base = dayname;
|
|
header[5].iov_len = strftime(dayname, sizeof(dayname), "%A", tp);
|
|
}
|
|
|
|
/*
|
|
* Possible date formats include any combination of:
|
|
* 3-charmonth (January, Jan, Jan)
|
|
* 3-charweekday (Friday, Monday, mon.)
|
|
* numeric month or day (1, 2, 04)
|
|
*
|
|
* Any character may separate them, or they may not be separated. Any line,
|
|
* following a line that is matched, that starts with "whitespace", is shown
|
|
* along with the matched line.
|
|
*/
|
|
isnow(endp)
|
|
char *endp;
|
|
{
|
|
int day, flags, month, v1, v2;
|
|
|
|
#define F_ISMONTH 0x01
|
|
#define F_ISDAY 0x02
|
|
flags = 0;
|
|
/* didn't recognize anything, skip it */
|
|
if (!(v1 = getfield(endp, &endp, &flags)))
|
|
return(0);
|
|
if (flags&F_ISDAY || v1 > 12) {
|
|
/* found a day */
|
|
day = v1;
|
|
/* if no recognizable month, assume just a day alone */
|
|
if (!(month = getfield(endp, &endp, &flags)))
|
|
month = tp->tm_mon + 1;
|
|
} else if (flags&F_ISMONTH) {
|
|
month = v1;
|
|
/* if no recognizable day, assume the first */
|
|
if (!(day = getfield(endp, &endp, &flags)))
|
|
day = 1;
|
|
} else {
|
|
v2 = getfield(endp, &endp, &flags);
|
|
if (flags&F_ISMONTH) {
|
|
day = v1;
|
|
month = v2;
|
|
} else {
|
|
/* F_ISDAY set, v2 > 12, or no way to tell */
|
|
month = v1;
|
|
/* if no recognizable day, assume the first */
|
|
day = v2 ? v2 : 1;
|
|
}
|
|
}
|
|
day = cumdays[month] + day;
|
|
|
|
/* if today or today + offset days */
|
|
if (day >= tp->tm_yday && day <= tp->tm_yday + offset)
|
|
return(1);
|
|
/* if number of days left in this year + days to event in next year */
|
|
if (yrdays - tp->tm_yday + day <= offset)
|
|
return(1);
|
|
return(0);
|
|
}
|
|
|
|
getfield(p, endp, flags)
|
|
char *p, **endp;
|
|
int *flags;
|
|
{
|
|
int val;
|
|
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););
|
|
savech = *p;
|
|
*p = '\0';
|
|
if (val = getmonth(start))
|
|
*flags |= F_ISMONTH;
|
|
else if (val = getday(start))
|
|
*flags |= F_ISDAY;
|
|
else
|
|
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];
|
|
char *mktemp();
|
|
|
|
/* open up calendar file as stdin */
|
|
if (!freopen("calendar", "r", stdin)) {
|
|
if (doall)
|
|
return((FILE *)NULL);
|
|
(void)fprintf(stderr, "calendar: no calendar file.\n");
|
|
exit(1);
|
|
}
|
|
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", "-I.", _PATH_INCLUDE, NULL);
|
|
_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)sprintf(path, "%s/_calXXXXXX", _PATH_TMP);
|
|
if ((fd = mkstemp(path)) < 0)
|
|
return(NULL);
|
|
return(fdopen(fd, "w+"));
|
|
}
|
|
|
|
closecal(fp)
|
|
FILE *fp;
|
|
{
|
|
struct stat sbuf;
|
|
int nread, pdes[2], status;
|
|
char buf[1024], *mktemp();
|
|
|
|
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);
|
|
}
|
|
|
|
static char *months[] = {
|
|
"jan", "feb", "mar", "apr", "may", "jun",
|
|
"jul", "aug", "sep", "oct", "nov", "dec", NULL,
|
|
};
|
|
getmonth(s)
|
|
register char *s;
|
|
{
|
|
register char **p;
|
|
|
|
for (p = months; *p; ++p)
|
|
if (!strncasecmp(s, *p, 3))
|
|
return((p - months) + 1);
|
|
return(0);
|
|
}
|
|
|
|
static char *days[] = {
|
|
"sun", "mon", "tue", "wed", "thu", "fri", "sat", NULL,
|
|
};
|
|
getday(s)
|
|
register char *s;
|
|
{
|
|
register char **p;
|
|
|
|
for (p = days; *p; ++p)
|
|
if (!strncasecmp(s, *p, 3))
|
|
return((p - days) + 1);
|
|
return(0);
|
|
}
|
|
|
|
usage()
|
|
{
|
|
(void)fprintf(stderr, "usage: calendar [-a]\n");
|
|
exit(1);
|
|
}
|