calendar.c revision 87235 
1/*
2 * Copyright (c) 1989, 1993, 1994
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#include <sys/cdefs.h>
35
36__FBSDID("$FreeBSD: head/usr.bin/calendar/calendar.c 87235 2001-12-02 22:44:14Z markm $");
37
38#ifndef lint
39static const char copyright[] =
40"@(#) Copyright (c) 1989, 1993\n\
41	The Regents of the University of California.  All rights reserved.\n";
42#endif
43
44#ifndef lint
45static const char sccsid[] = "@(#)calendar.c  8.3 (Berkeley) 3/25/94";
46#endif
47
48#include <err.h>
49#include <errno.h>
50#include <locale.h>
51#include <pwd.h>
52#include <stdio.h>
53#include <stdlib.h>
54#include <time.h>
55#include <unistd.h>
56
57#include "pathnames.h"
58#include "calendar.h"
59
60struct passwd *pw;
61int doall = 0;
62time_t f_time = 0;
63
64int f_dayAfter = 0; /* days after current date */
65int f_dayBefore = 0; /* days before current date */
66
67int
68main(argc, argv)
69	int argc;
70	char *argv[];
71{
72	int ch;
73
74	(void) setlocale(LC_ALL, "");
75
76	while ((ch = getopt(argc, argv, "-af:t:A:B:")) != -1)
77		switch (ch) {
78		case '-':		/* backward contemptible */
79		case 'a':
80			if (getuid()) {
81				errno = EPERM;
82				err(1, NULL);
83			}
84			doall = 1;
85			break;
86
87
88		case 'f': /* other calendar file */
89		        calendarFile = optarg;
90			break;
91
92		case 't': /* other date, undocumented, for tests */
93			f_time = Mktime (optarg);
94			break;
95
96		case 'A': /* days after current date */
97			f_dayAfter = atoi(optarg);
98			break;
99
100		case 'B': /* days before current date */
101			f_dayBefore = atoi(optarg);
102			break;
103
104		case '?':
105		default:
106			usage();
107		}
108	argc -= optind;
109	argv += optind;
110
111	if (argc)
112		usage();
113
114	/* use current time */
115	if (f_time <= 0)
116	    (void)time(&f_time);
117
118	settime(f_time);
119
120	if (doall)
121		while ((pw = getpwent()) != NULL) {
122			(void)setegid(pw->pw_gid);
123			(void)initgroups(pw->pw_name, pw->pw_gid);
124			(void)seteuid(pw->pw_uid);
125			if (!chdir(pw->pw_dir))
126				cal();
127			(void)seteuid(0);
128		}
129	else
130		cal();
131	exit(0);
132}
133
134
135void
136usage()
137{
138	(void)fprintf(stderr,
139		      "usage: calendar [-a] [-A days] [-B days] [-f calendarfile] [-t dd[.mm[.year]]]\n");
140	exit(1);
141}
142
143
144