OpenBSD-4.6/usr.bin/calendar/io.c
/* $OpenBSD: io.c,v 1.34 2007/10/17 20:10:44 chl 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.
*/
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1989, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
#if 0
static const char sccsid[] = "@(#)calendar.c 8.3 (Berkeley) 3/25/94";
#else
static const char rcsid[] = "$OpenBSD: io.c,v 1.34 2007/10/17 20:10:44 chl Exp $";
#endif
#endif /* not lint */
#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(*p) && !isalpha(*p) && *p != '*' && *p != '\t'; ++p)
;
if (*p == '*') { /* `*' is every month */
*flags |= F_ISMONTH;
*endp = p+1;
return (-1); /* means 'every month' */
}
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
}
}
/* 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(*p) && !isalpha(*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;
}
}