2939897921
There was code to process an #ifndef tokens, but none for #ifdef. The #ifdef token was mentioned as unsupported in the BUGS section, but no reason was given and I do not see why it should stay omitted. Misleading information in The BUGS section of the man-page regarding the maximum number of #define and #include statements supported has been removed. These limits might have applied to a prior version of this program, but do not seem to apply to the current implementation. I have not tried to test for the existence of the limits, but the include file processing just recursively calls the parser (without counting the recursion depth) and the stringlist functions do not impose a limit on the number of entries. Reported by: jhs@berklix.com MFC after: 3 days
524 lines
11 KiB
C
524 lines
11 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1989, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1989, 1993\n\
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The Regents of the University of California. All rights reserved.\n";
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#endif
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#if 0
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#ifndef lint
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static char sccsid[] = "@(#)calendar.c 8.3 (Berkeley) 3/25/94";
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#endif
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#endif
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/stat.h>
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#include <sys/wait.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <langinfo.h>
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#include <locale.h>
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#include <pwd.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <stringlist.h>
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#include <time.h>
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#include <unistd.h>
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#include "pathnames.h"
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#include "calendar.h"
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enum {
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T_OK = 0,
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T_ERR,
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T_PROCESS,
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};
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const char *calendarFile = "calendar"; /* default calendar file */
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static const char *calendarHomes[] = {".calendar", _PATH_INCLUDE_LOCAL, _PATH_INCLUDE}; /* HOME */
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static const char *calendarNoMail = "nomail";/* don't sent mail if file exist */
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static char path[MAXPATHLEN];
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struct fixs neaster, npaskha, ncny, nfullmoon, nnewmoon;
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struct fixs nmarequinox, nsepequinox, njunsolstice, ndecsolstice;
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static int cal_parse(FILE *in, FILE *out);
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static StringList *definitions = NULL;
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static struct event *events[MAXCOUNT];
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static char *extradata[MAXCOUNT];
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static void
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trimlr(char **buf)
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{
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char *walk = *buf;
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char *last;
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while (isspace(*walk))
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walk++;
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if (*walk != '\0') {
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last = walk + strlen(walk) - 1;
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while (last > walk && isspace(*last))
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last--;
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*(last+1) = 0;
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}
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*buf = walk;
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}
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static FILE *
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cal_fopen(const char *file)
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{
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FILE *fp;
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char *home = getenv("HOME");
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unsigned int i;
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struct stat sb;
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static bool warned = false;
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if (home == NULL || *home == '\0') {
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warnx("Cannot get home directory");
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return (NULL);
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}
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if (chdir(home) != 0) {
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warnx("Cannot enter home directory");
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return (NULL);
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}
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for (i = 0; i < nitems(calendarHomes); i++) {
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if (chdir(calendarHomes[i]) != 0)
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continue;
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if ((fp = fopen(file, "r")) != NULL)
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return (fp);
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}
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warnx("can't open calendar file \"%s\"", file);
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if (!warned && stat(_PATH_INCLUDE_LOCAL, &sb) != 0) {
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warnx("calendar data files now provided by calendar-data pkg.");
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warned = true;
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}
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return (NULL);
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}
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static int
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token(char *line, FILE *out, bool *skip)
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{
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char *walk, c, a;
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if (strncmp(line, "endif", 5) == 0) {
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*skip = false;
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return (T_OK);
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}
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if (*skip)
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return (T_OK);
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if (strncmp(line, "include", 7) == 0) {
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walk = line + 7;
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trimlr(&walk);
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if (*walk == '\0') {
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warnx("Expecting arguments after #include");
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return (T_ERR);
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}
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if (*walk != '<' && *walk != '\"') {
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warnx("Excecting '<' or '\"' after #include");
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return (T_ERR);
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}
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a = *walk;
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walk++;
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c = walk[strlen(walk) - 1];
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switch(c) {
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case '>':
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if (a != '<') {
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warnx("Unterminated include expecting '\"'");
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return (T_ERR);
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}
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break;
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case '\"':
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if (a != '\"') {
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warnx("Unterminated include expecting '>'");
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return (T_ERR);
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}
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break;
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default:
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warnx("Unterminated include expecting '%c'",
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a == '<' ? '>' : '\"' );
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return (T_ERR);
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}
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walk[strlen(walk) - 1] = '\0';
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if (cal_parse(cal_fopen(walk), out))
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return (T_ERR);
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return (T_OK);
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}
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if (strncmp(line, "define", 6) == 0) {
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if (definitions == NULL)
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definitions = sl_init();
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walk = line + 6;
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trimlr(&walk);
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if (*walk == '\0') {
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warnx("Expecting arguments after #define");
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return (T_ERR);
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}
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sl_add(definitions, strdup(walk));
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return (T_OK);
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}
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if (strncmp(line, "ifdef", 5) == 0) {
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walk = line + 6;
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trimlr(&walk);
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if (*walk == '\0') {
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warnx("Expecting arguments after #ifdef");
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return (T_ERR);
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}
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if (definitions == NULL || sl_find(definitions, walk) == NULL)
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*skip = true;
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return (T_OK);
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}
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if (strncmp(line, "ifndef", 6) == 0) {
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walk = line + 6;
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trimlr(&walk);
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if (*walk == '\0') {
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warnx("Expecting arguments after #ifndef");
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return (T_ERR);
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}
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if (definitions != NULL && sl_find(definitions, walk) != NULL)
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*skip = true;
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return (T_OK);
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}
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return (T_PROCESS);
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}
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#define REPLACE(string, slen, struct_) \
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if (strncasecmp(buf, (string), (slen)) == 0 && buf[(slen)]) { \
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if (struct_.name != NULL) \
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free(struct_.name); \
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if ((struct_.name = strdup(buf + (slen))) == NULL) \
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errx(1, "cannot allocate memory"); \
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struct_.len = strlen(buf + (slen)); \
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continue; \
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}
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static int
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cal_parse(FILE *in, FILE *out)
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{
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char *line = NULL;
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char *buf;
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size_t linecap = 0;
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ssize_t linelen;
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ssize_t l;
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static int d_first = -1;
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static int count = 0;
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int i;
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int month[MAXCOUNT];
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int day[MAXCOUNT];
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int year[MAXCOUNT];
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bool skip = false;
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char dbuf[80];
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char *pp, p;
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struct tm tm;
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int flags;
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/* Unused */
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tm.tm_sec = 0;
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tm.tm_min = 0;
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tm.tm_hour = 0;
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tm.tm_wday = 0;
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if (in == NULL)
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return (1);
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while ((linelen = getline(&line, &linecap, in)) > 0) {
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if (*line == '#') {
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switch (token(line+1, out, &skip)) {
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case T_ERR:
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free(line);
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return (1);
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case T_OK:
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continue;
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case T_PROCESS:
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break;
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default:
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break;
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}
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}
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if (skip)
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continue;
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buf = line;
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for (l = linelen;
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l > 0 && isspace((unsigned char)buf[l - 1]);
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l--)
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;
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buf[l] = '\0';
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if (buf[0] == '\0')
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continue;
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/*
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* Setting LANG in user's calendar was an old workaround
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* for 'calendar -a' being run with C locale to properly
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* print user's calendars in their native languages.
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* Now that 'calendar -a' does fork with setusercontext(),
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* and does not run iconv(), this variable has little use.
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*/
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if (strncmp(buf, "LANG=", 5) == 0) {
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(void)setlocale(LC_ALL, buf + 5);
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d_first = (*nl_langinfo(D_MD_ORDER) == 'd');
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#ifdef WITH_ICONV
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if (!doall)
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set_new_encoding();
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#endif
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setnnames();
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continue;
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}
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/* Parse special definitions: Easter, Paskha etc */
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REPLACE("Easter=", 7, neaster);
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REPLACE("Paskha=", 7, npaskha);
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REPLACE("ChineseNewYear=", 15, ncny);
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REPLACE("NewMoon=", 8, nnewmoon);
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REPLACE("FullMoon=", 9, nfullmoon);
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REPLACE("MarEquinox=", 11, nmarequinox);
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REPLACE("SepEquinox=", 11, nsepequinox);
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REPLACE("JunSolstice=", 12, njunsolstice);
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REPLACE("DecSolstice=", 12, ndecsolstice);
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if (strncmp(buf, "SEQUENCE=", 9) == 0) {
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setnsequences(buf + 9);
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continue;
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}
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/*
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* If the line starts with a tab, the data has to be
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* added to the previous line
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*/
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if (buf[0] == '\t') {
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for (i = 0; i < count; i++)
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event_continue(events[i], buf);
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continue;
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}
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/* Get rid of leading spaces (non-standard) */
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while (isspace((unsigned char)buf[0]))
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memcpy(buf, buf + 1, strlen(buf));
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/* No tab in the line, then not a valid line */
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if ((pp = strchr(buf, '\t')) == NULL)
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continue;
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/* Trim spaces in front of the tab */
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while (isspace((unsigned char)pp[-1]))
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pp--;
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p = *pp;
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*pp = '\0';
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if ((count = parsedaymonth(buf, year, month, day, &flags,
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extradata)) == 0)
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continue;
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*pp = p;
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if (count < 0) {
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/* Show error status based on return value */
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if (debug)
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fprintf(stderr, "Ignored: %s\n", buf);
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if (count == -1)
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continue;
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count = -count + 1;
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}
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/* Find the last tab */
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while (pp[1] == '\t')
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pp++;
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if (d_first < 0)
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d_first = (*nl_langinfo(D_MD_ORDER) == 'd');
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for (i = 0; i < count; i++) {
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tm.tm_mon = month[i] - 1;
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tm.tm_mday = day[i];
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tm.tm_year = year[i] - 1900;
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(void)strftime(dbuf, sizeof(dbuf),
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d_first ? "%e %b" : "%b %e", &tm);
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if (debug)
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fprintf(stderr, "got %s\n", pp);
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events[i] = event_add(year[i], month[i], day[i], dbuf,
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((flags &= F_VARIABLE) != 0) ? 1 : 0, pp,
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extradata[i]);
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}
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}
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free(line);
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fclose(in);
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return (0);
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}
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void
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cal(void)
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{
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FILE *fpin;
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FILE *fpout;
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int i;
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for (i = 0; i < MAXCOUNT; i++)
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extradata[i] = (char *)calloc(1, 20);
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if ((fpin = opencalin()) == NULL)
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return;
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if ((fpout = opencalout()) == NULL) {
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fclose(fpin);
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return;
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}
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if (cal_parse(fpin, fpout))
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return;
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event_print_all(fpout);
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closecal(fpout);
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}
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FILE *
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opencalin(void)
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{
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struct stat sbuf;
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FILE *fpin;
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/* open up calendar file */
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if ((fpin = fopen(calendarFile, "r")) == NULL) {
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if (doall) {
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if (chdir(calendarHomes[0]) != 0)
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return (NULL);
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if (stat(calendarNoMail, &sbuf) == 0)
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return (NULL);
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if ((fpin = fopen(calendarFile, "r")) == NULL)
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return (NULL);
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} else {
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fpin = cal_fopen(calendarFile);
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}
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}
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return (fpin);
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}
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FILE *
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opencalout(void)
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{
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int fd;
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/* not reading all calendar files, just set output to stdout */
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if (!doall)
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return (stdout);
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/* set output to a temporary file, so if no output don't send mail */
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snprintf(path, sizeof(path), "%s/_calXXXXXX", _PATH_TMP);
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if ((fd = mkstemp(path)) < 0)
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return (NULL);
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return (fdopen(fd, "w+"));
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}
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void
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closecal(FILE *fp)
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{
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struct stat sbuf;
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int nread, pdes[2], status;
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char buf[1024];
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if (!doall)
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return;
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rewind(fp);
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if (fstat(fileno(fp), &sbuf) || !sbuf.st_size)
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goto done;
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if (pipe(pdes) < 0)
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goto done;
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switch (fork()) {
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case -1: /* error */
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(void)close(pdes[0]);
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(void)close(pdes[1]);
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goto done;
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case 0:
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/* child -- set stdin to pipe output */
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if (pdes[0] != STDIN_FILENO) {
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(void)dup2(pdes[0], STDIN_FILENO);
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(void)close(pdes[0]);
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}
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(void)close(pdes[1]);
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execl(_PATH_SENDMAIL, "sendmail", "-i", "-t", "-F",
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"\"Reminder Service\"", (char *)NULL);
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warn(_PATH_SENDMAIL);
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_exit(1);
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}
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/* parent -- write to pipe input */
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(void)close(pdes[0]);
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write(pdes[1], "From: \"Reminder Service\" <", 26);
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write(pdes[1], pw->pw_name, strlen(pw->pw_name));
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write(pdes[1], ">\nTo: <", 7);
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write(pdes[1], pw->pw_name, strlen(pw->pw_name));
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write(pdes[1], ">\nSubject: ", 11);
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write(pdes[1], dayname, strlen(dayname));
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write(pdes[1], "'s Calendar\nPrecedence: bulk\n\n", 30);
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while ((nread = read(fileno(fp), buf, sizeof(buf))) > 0)
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(void)write(pdes[1], buf, nread);
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(void)close(pdes[1]);
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done: (void)fclose(fp);
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(void)unlink(path);
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while (wait(&status) >= 0);
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}
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