FreeBSD-5.3/usr.bin/calendar/io.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 const char copyright[] =
"@(#) Copyright (c) 1989, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif
#if 0
#ifndef lint
static char sccsid[] = "@(#)calendar.c 8.3 (Berkeley) 3/25/94";
#endif
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/usr.bin/calendar/io.c,v 1.19 2002/07/28 13:46:09 jmallett Exp $");
#include <sys/types.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/uio.h>
#include <sys/wait.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <langinfo.h>
#include <locale.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "pathnames.h"
#include "calendar.h"
const char *calendarFile = "calendar"; /* default calendar file */
const char *calendarHomes[] = { ".calendar", _PATH_INCLUDE }; /* HOME */
const char *calendarNoMail = "nomail"; /* don't sent mail if this file exist */
struct fixs neaster, npaskha;
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()
{
int printing;
char *p;
FILE *fp;
int ch, l;
int month;
int day;
int var;
static int d_first = -1;
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);
for (l = strlen(buf);
l > 0 && isspace((unsigned char)buf[l - 1]);
l--)
;
buf[l] = '\0';
if (buf[0] == '\0')
continue;
if (strncmp(buf, "LANG=", 5) == 0) {
(void) setlocale(LC_ALL, buf + 5);
d_first = (*nl_langinfo(D_MD_ORDER) == 'd');
setnnames();
continue;
}
if (strncasecmp(buf, "Easter=", 7) == 0 && buf[7]) {
if (neaster.name != NULL)
free(neaster.name);
if ((neaster.name = strdup(buf + 7)) == NULL)
errx(1, "cannot allocate memory");
neaster.len = strlen(buf + 7);
continue;
}
if (strncasecmp(buf, "Paskha=", 7) == 0 && buf[7]) {
if (npaskha.name != NULL)
free(npaskha.name);
if ((npaskha.name = strdup(buf + 7)) == NULL)
errx(1, "cannot allocate memory");
npaskha.len = strlen(buf + 7);
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) {
struct tm tm;
char dbuf[80];
if (d_first < 0)
d_first = (*nl_langinfo(D_MD_ORDER) == 'd');
tm.tm_sec = 0; /* unused */
tm.tm_min = 0; /* unused */
tm.tm_hour = 0; /* unused */
tm.tm_wday = 0; /* unused */
tm.tm_mon = month - 1;
tm.tm_mday = day;
tm.tm_year = tp->tm_year; /* unused */
(void)strftime(dbuf, sizeof(dbuf),
d_first ? "%e %b" : "%b %e",
&tm);
(void)fprintf(fp, "%s%c%s\n", dbuf,
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((unsigned char)*p) && !isalpha((unsigned char)*p) && *p != '*'; ++p);
if (*p == '*') { /* `*' is current month */
*flags |= F_ISMONTH;
*endp = p+1;
return (tp->tm_mon + 1);
}
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
}
}
/* Easter */
else if ((val = geteaster(start, tp->tm_year + 1900)) != 0)
*flags |= F_EASTER;
/* Paskha */
else if ((val = getpaskha(start, tp->tm_year + 1900)) != 0)
*flags |= F_EASTER;
/* undefined rest */
else {
*p = savech;
return (0);
}
for (*p = savech; !isdigit((unsigned char)*p) && !isalpha((unsigned char)*p) && *p != '*'; ++p);
*endp = p;
return (val);
}
char path[MAXPATHLEN];
FILE *
opencal()
{
uid_t uid;
size_t i;
int fd, found, pdes[2];
struct stat sbuf;
/* open up calendar file as stdin */
if (!freopen(calendarFile, "r", stdin)) {
if (doall) {
if (chdir(calendarHomes[0]) != 0)
return (NULL);
if (stat(calendarNoMail, &sbuf) == 0)
return (NULL);
if (!freopen(calendarFile, "r", stdin))
return (NULL);
} else {
chdir(getenv("HOME"));
for (found = i = 0; i < sizeof(calendarHomes) /
sizeof(calendarHomes[0]); i++)
if (chdir(calendarHomes[i]) == 0 &&
freopen(calendarFile, "r", stdin)) {
found = 1;
break;
}
if (!found)
errx(1, "no calendar file: ``%s''", calendarFile);
}
}
if (pipe(pdes) < 0)
return (NULL);
switch (fork()) {
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]);
uid = geteuid();
if (setuid(getuid()) < 0) {
warnx("first setuid failed");
_exit(1);
};
if (setgid(getegid()) < 0) {
warnx("setgid failed");
_exit(1);
}
if (setuid(uid) < 0) {
warnx("setuid failed");
_exit(1);
}
execl(_PATH_CPP, "cpp", "-P",
"-traditional", "-nostdinc", /* GCC specific opts */
"-I.", "-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 */
(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;
{
uid_t uid;
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 (fork()) {
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]);
uid = geteuid();
if (setuid(getuid()) < 0) {
warnx("setuid failed");
_exit(1);
};
if (setgid(getegid()) < 0) {
warnx("setgid failed");
_exit(1);
}
if (setuid(uid) < 0) {
warnx("setuid failed");
_exit(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, 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);
}