/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* 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
#if 0
#ifndef lint
static char sccsid[] = "@(#)calendar.c 8.3 (Berkeley) 3/25/94";
#endif
#endif
#include <sys/cdefs.h>
#include <sys/param.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <libutil.h>
#include <locale.h>
#include <pwd.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stringlist.h>
#include <time.h>
#include <unistd.h>
#include "pathnames.h"
#include "calendar.h"
enum {
T_OK = 0,
T_ERR,
T_PROCESS,
};
const char *calendarFile = "calendar"; /* default calendar file */
static const char *calendarHomes[] = {".calendar", _PATH_INCLUDE_LOCAL, _PATH_INCLUDE}; /* HOME */
static const char *calendarNoMail = "nomail";/* don't sent mail if file exist */
static char path[MAXPATHLEN];
static const char *cal_home;
static const char *cal_dir;
static const char *cal_file;
static int cal_line;
struct fixs neaster, npaskha, ncny, nfullmoon, nnewmoon;
struct fixs nmarequinox, nsepequinox, njunsolstice, ndecsolstice;
static int cal_parse(FILE *in, FILE *out);
static StringList *definitions = NULL;
static struct event *events[MAXCOUNT];
static char *extradata[MAXCOUNT];
static char *
trimlr(char **buf)
{
char *walk = *buf;
char *sep;
char *last;
while (isspace(*walk))
walk++;
*buf = walk;
sep = walk;
while (*sep != '\0' && !isspace(*sep))
sep++;
if (*sep != '\0') {
last = sep + strlen(sep) - 1;
while (last > walk && isspace(*last))
last--;
*(last+1) = 0;
}
return (sep);
}
static FILE *
cal_fopen(const char *file)
{
FILE *fp;
char *home = getenv("HOME");
unsigned int i;
struct stat sb;
static bool warned = false;
static char calendarhome[MAXPATHLEN];
if (home == NULL || *home == '\0') {
warnx("Cannot get home directory");
return (NULL);
}
if (chdir(home) != 0) {
warnx("Cannot enter home directory \"%s\"", home);
return (NULL);
}
for (i = 0; i < nitems(calendarHomes); i++) {
if (snprintf(calendarhome, sizeof (calendarhome), calendarHomes[i],
getlocalbase()) >= (int)sizeof (calendarhome))
continue;
if (chdir(calendarhome) != 0)
continue;
if ((fp = fopen(file, "r")) != NULL) {
cal_home = home;
cal_dir = calendarhome;
cal_file = file;
return (fp);
}
}
warnx("can't open calendar file \"%s\"", file);
if (!warned) {
snprintf(path, sizeof(path), _PATH_INCLUDE_LOCAL, getlocalbase());
if (stat(path, &sb) != 0) {
warnx("calendar data files now provided by calendar-data pkg.");
warned = true;
}
}
return (NULL);
}
static char*
cal_path(void)
{
static char buffer[MAXPATHLEN + 10];
if (cal_dir == NULL)
snprintf(buffer, sizeof(buffer), "%s", cal_file);
else if (cal_dir[0] == '/')
snprintf(buffer, sizeof(buffer), "%s/%s", cal_dir, cal_file);
else
snprintf(buffer, sizeof(buffer), "%s/%s/%s", cal_home, cal_dir, cal_file);
return (buffer);
}
#define WARN0(format) \
warnx(format " in %s line %d", cal_path(), cal_line)
#define WARN1(format, arg1) \
warnx(format " in %s line %d", arg1, cal_path(), cal_line)
static char*
cmptoken(char *line, const char* token)
{
char len = strlen(token);
if (strncmp(line, token, len) != 0)
return NULL;
return (line + len);
}
static int
token(char *line, FILE *out, int *skip, int *unskip)
{
char *walk, *sep, a, c;
const char *this_cal_home;
const char *this_cal_dir;
const char *this_cal_file;
int this_cal_line;
while (isspace(*line))
line++;
if (cmptoken(line, "endif")) {
if (*skip + *unskip == 0) {
WARN0("#endif without prior #ifdef or #ifndef");
return (T_ERR);
}
if (*skip > 0)
--*skip;
else
--*unskip;
return (T_OK);
}
walk = cmptoken(line, "ifdef");
if (walk != NULL) {
sep = trimlr(&walk);
if (*walk == '\0') {
WARN0("Expecting arguments after #ifdef");
return (T_ERR);
}
if (*sep != '\0') {
WARN1("Expecting a single word after #ifdef "
"but got \"%s\"", walk);
return (T_ERR);
}
if (*skip != 0 ||
definitions == NULL || sl_find(definitions, walk) == NULL)
++*skip;
else
++*unskip;
return (T_OK);
}
walk = cmptoken(line, "ifndef");
if (walk != NULL) {
sep = trimlr(&walk);
if (*walk == '\0') {
WARN0("Expecting arguments after #ifndef");
return (T_ERR);
}
if (*sep != '\0') {
WARN1("Expecting a single word after #ifndef "
"but got \"%s\"", walk);
return (T_ERR);
}
if (*skip != 0 ||
(definitions != NULL && sl_find(definitions, walk) != NULL))
++*skip;
else
++*unskip;
return (T_OK);
}
walk = cmptoken(line, "else");
if (walk != NULL) {
(void)trimlr(&walk);
if (*walk != '\0') {
WARN0("Expecting no arguments after #else");
return (T_ERR);
}
if (*skip + *unskip == 0) {
WARN0("#else without prior #ifdef or #ifndef");
return (T_ERR);
}
if (*skip == 0) {
++*skip;
--*unskip;
} else if (*skip == 1) {
--*skip;
++*unskip;
}
return (T_OK);
}
if (*skip != 0)
return (T_OK);
walk = cmptoken(line, "include");
if (walk != NULL) {
(void)trimlr(&walk);
if (*walk == '\0') {
WARN0("Expecting arguments after #include");
return (T_ERR);
}
if (*walk != '<' && *walk != '\"') {
WARN0("Excecting '<' or '\"' after #include");
return (T_ERR);
}
a = *walk == '<' ? '>' : '\"';
walk++;
c = walk[strlen(walk) - 1];
if (a != c) {
WARN1("Unterminated include expecting '%c'", a);
return (T_ERR);
}
walk[strlen(walk) - 1] = '\0';
this_cal_home = cal_home;
this_cal_dir = cal_dir;
this_cal_file = cal_file;
this_cal_line = cal_line;
if (cal_parse(cal_fopen(walk), out))
return (T_ERR);
cal_home = this_cal_home;
cal_dir = this_cal_dir;
cal_file = this_cal_file;
cal_line = this_cal_line;
return (T_OK);
}
walk = cmptoken(line, "define");
if (walk != NULL) {
if (definitions == NULL)
definitions = sl_init();
sep = trimlr(&walk);
*sep = '\0';
if (*walk == '\0') {
WARN0("Expecting arguments after #define");
return (T_ERR);
}
if (sl_find(definitions, walk) == NULL)
sl_add(definitions, strdup(walk));
return (T_OK);
}
walk = cmptoken(line, "undef");
if (walk != NULL) {
if (definitions != NULL) {
sep = trimlr(&walk);
if (*walk == '\0') {
WARN0("Expecting arguments after #undef");
return (T_ERR);
}
if (*sep != '\0') {
WARN1("Expecting a single word after #undef "
"but got \"%s\"", walk);
return (T_ERR);
}
walk = sl_find(definitions, walk);
if (walk != NULL)
walk[0] = '\0';
}
return (T_OK);
}
walk = cmptoken(line, "warning");
if (walk != NULL) {
(void)trimlr(&walk);
WARN1("Warning: %s", walk);
}
walk = cmptoken(line, "error");
if (walk != NULL) {
(void)trimlr(&walk);
WARN1("Error: %s", walk);
return (T_ERR);
}
WARN1("Undefined pre-processor command \"#%s\"", line);
return (T_ERR);
}
static void
setup_locale(const char *locale)
{
(void)setlocale(LC_ALL, locale);
#ifdef WITH_ICONV
if (!doall)
set_new_encoding();
#endif
setnnames();
}
#define REPLACE(string, slen, struct_) \
if (strncasecmp(buf, (string), (slen)) == 0 && buf[(slen)]) { \
if (struct_.name != NULL) \
free(struct_.name); \
if ((struct_.name = strdup(buf + (slen))) == NULL) \
errx(1, "cannot allocate memory"); \
struct_.len = strlen(buf + (slen)); \
continue; \
}
static int
cal_parse(FILE *in, FILE *out)
{
char *mylocale = NULL;
char *line = NULL;
char *buf, *bufp;
size_t linecap = 0;
ssize_t linelen;
ssize_t l;
static int count = 0;
int i;
int month[MAXCOUNT];
int day[MAXCOUNT];
int year[MAXCOUNT];
int skip = 0;
int unskip = 0;
char *pp, p;
int flags;
char *c, *cc;
bool incomment = false;
if (in == NULL)
return (1);
cal_line = 0;
while ((linelen = getline(&line, &linecap, in)) > 0) {
cal_line++;
buf = line;
if (buf[linelen - 1] == '\n')
buf[--linelen] = '\0';
if (incomment) {
c = strstr(buf, "*/");
if (c) {
c += 2;
linelen -= c - buf;
buf = c;
incomment = false;
} else {
continue;
}
}
if (!incomment) {
bufp = buf;
do {
c = strstr(bufp, "//");
cc = strstr(bufp, "/*");
if (c != NULL && (cc == NULL || c - cc < 0)) {
bufp = c + 2;
/* ignore "//" within string to allow it in an URL */
if (c == buf || isspace(c[-1])) {
/* single line comment */
*c = '\0';
linelen = c - buf;
break;
}
} else if (cc != NULL) {
c = strstr(cc + 2, "*/");
if (c != NULL) { // 'a /* b */ c' -- cc=2, c=7+2
/* multi-line comment ending on same line */
c += 2;
memmove(cc, c, buf + linelen + 1 - c);
linelen -= c - cc;
bufp = cc;
} else {
/* multi-line comment */
*cc = '\0';
linelen = cc - buf;
incomment = true;
break;
}
}
} while (c != NULL || cc != NULL);
}
for (l = linelen;
l > 0 && isspace((unsigned char)buf[l - 1]);
l--)
;
buf[l] = '\0';
if (buf[0] == '\0')
continue;
if (buf == line && *buf == '#') {
switch (token(buf+1, out, &skip, &unskip)) {
case T_ERR:
free(line);
return (1);
case T_OK:
continue;
case T_PROCESS:
break;
default:
break;
}
}
if (skip != 0)
continue;
/*
* Setting LANG in user's calendar was an old workaround
* for 'calendar -a' being run with C locale to properly
* print user's calendars in their native languages.
* Now that 'calendar -a' does fork with setusercontext(),
* and does not run iconv(), this variable has little use.
*/
if (strncmp(buf, "LANG=", 5) == 0) {
if (mylocale == NULL)
mylocale = strdup(setlocale(LC_ALL, NULL));
setup_locale(buf + 5);
continue;
}
/* Parse special definitions: Easter, Paskha etc */
REPLACE("Easter=", 7, neaster);
REPLACE("Paskha=", 7, npaskha);
REPLACE("ChineseNewYear=", 15, ncny);
REPLACE("NewMoon=", 8, nnewmoon);
REPLACE("FullMoon=", 9, nfullmoon);
REPLACE("MarEquinox=", 11, nmarequinox);
REPLACE("SepEquinox=", 11, nsepequinox);
REPLACE("JunSolstice=", 12, njunsolstice);
REPLACE("DecSolstice=", 12, ndecsolstice);
if (strncmp(buf, "SEQUENCE=", 9) == 0) {
setnsequences(buf + 9);
continue;
}
/*
* If the line starts with a tab, the data has to be
* added to the previous line
*/
if (buf[0] == '\t') {
for (i = 0; i < count; i++)
event_continue(events[i], buf);
continue;
}
/* Get rid of leading spaces (non-standard) */
while (isspace((unsigned char)buf[0]))
memcpy(buf, buf + 1, strlen(buf));
/* No tab in the line, then not a valid line */
if ((pp = strchr(buf, '\t')) == NULL)
continue;
/* Trim spaces in front of the tab */
while (isspace((unsigned char)pp[-1]))
pp--;
p = *pp;
*pp = '\0';
if ((count = parsedaymonth(buf, year, month, day, &flags,
extradata)) == 0)
continue;
*pp = p;
if (count < 0) {
/* Show error status based on return value */
if (debug)
WARN1("Ignored: \"%s\"", buf);
if (count == -1)
continue;
count = -count + 1;
}
/* Find the last tab */
while (pp[1] == '\t')
pp++;
for (i = 0; i < count; i++) {
if (debug)
WARN1("got \"%s\"", pp);
events[i] = event_add(year[i], month[i], day[i],
((flags &= F_VARIABLE) != 0) ? 1 : 0, pp,
extradata[i]);
}
}
while (skip-- > 0 || unskip-- > 0) {
cal_line++;
WARN0("Missing #endif assumed");
}
free(line);
fclose(in);
if (mylocale != NULL) {
setup_locale(mylocale);
free(mylocale);
}
return (0);
}
void
cal(void)
{
FILE *fpin;
FILE *fpout;
int i;
for (i = 0; i < MAXCOUNT; i++)
extradata[i] = (char *)calloc(1, 20);
if ((fpin = opencalin()) == NULL)
return;
if ((fpout = opencalout()) == NULL) {
fclose(fpin);
return;
}
if (cal_parse(fpin, fpout))
return;
event_print_all(fpout);
closecal(fpout);
}
FILE *
opencalin(void)
{
struct stat sbuf;
FILE *fpin;
/* open up calendar file */
cal_file = calendarFile;
if ((fpin = fopen(calendarFile, "r")) == NULL) {
if (doall) {
if (chdir(calendarHomes[0]) != 0)
return (NULL);
if (stat(calendarNoMail, &sbuf) == 0)
return (NULL);
if ((fpin = fopen(calendarFile, "r")) == NULL)
return (NULL);
} else {
fpin = cal_fopen(calendarFile);
}
}
return (fpin);
}
FILE *
opencalout(void)
{
int fd;
/* 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 */
snprintf(path, sizeof(path), "%s/_calXXXXXX", _PATH_TMP);
if ((fd = mkstemp(path)) < 0)
return (NULL);
return (fdopen(fd, "w+"));
}
void
closecal(FILE *fp)
{
struct stat sbuf;
int nread, pdes[2], status;
char buf[1024];
if (!doall)
return;
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]);
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]);
write(pdes[1], "From: \"Reminder Service\" <", 26);
write(pdes[1], pw->pw_name, strlen(pw->pw_name));
write(pdes[1], ">\nTo: <", 7);
write(pdes[1], pw->pw_name, strlen(pw->pw_name));
write(pdes[1], ">\nSubject: ", 11);
write(pdes[1], dayname, strlen(dayname));
write(pdes[1], "'s Calendar\nPrecedence: bulk\n\n", 30);
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);
}
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