calendar.c revision 87628 
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#ifndef lint
35static const char copyright[] =
36"@(#) Copyright (c) 1989, 1993\n\
37	The Regents of the University of California.  All rights reserved.\n";
38#endif
39
40#if 0
41#ifndef lint
42static char sccsid[] = "@(#)calendar.c  8.3 (Berkeley) 3/25/94";
43#endif
44#endif
45
46#include <sys/cdefs.h>
47__FBSDID("$FreeBSD: head/usr.bin/calendar/calendar.c 87628 2001-12-10 21:13:08Z dwmalone $");
48
49#include <err.h>
50#include <errno.h>
51#include <locale.h>
52#include <pwd.h>
53#include <stdio.h>
54#include <stdlib.h>
55#include <time.h>
56#include <unistd.h>
57
58#include "pathnames.h"
59#include "calendar.h"
60
61struct passwd *pw;
62int doall = 0;
63time_t f_time = 0;
64
65int f_dayAfter = 0; /* days after current date */
66int f_dayBefore = 0; /* days before current date */
67
68int
69main(argc, argv)
70	int argc;
71	char *argv[];
72{
73	int ch;
74
75	(void) setlocale(LC_ALL, "");
76
77	while ((ch = getopt(argc, argv, "-af:t:A:B:")) != -1)
78		switch (ch) {
79		case '-':		/* backward contemptible */
80		case 'a':
81			if (getuid()) {
82				errno = EPERM;
83				err(1, NULL);
84			}
85			doall = 1;
86			break;
87
88
89		case 'f': /* other calendar file */
90		        calendarFile = optarg;
91			break;
92
93		case 't': /* other date, undocumented, for tests */
94			f_time = Mktime (optarg);
95			break;
96
97		case 'A': /* days after current date */
98			f_dayAfter = atoi(optarg);
99			break;
100
101		case 'B': /* days before current date */
102			f_dayBefore = atoi(optarg);
103			break;
104
105		case '?':
106		default:
107			usage();
108		}
109	argc -= optind;
110	argv += optind;
111
112	if (argc)
113		usage();
114
115	/* use current time */
116	if (f_time <= 0)
117	    (void)time(&f_time);
118
119	settime(f_time);
120
121	if (doall)
122		while ((pw = getpwent()) != NULL) {
123			(void)setegid(pw->pw_gid);
124			(void)initgroups(pw->pw_name, pw->pw_gid);
125			(void)seteuid(pw->pw_uid);
126			if (!chdir(pw->pw_dir))
127				cal();
128			(void)seteuid(0);
129		}
130	else
131		cal();
132	exit(0);
133}
134
135
136void
137usage()
138{
139	(void)fprintf(stderr,
140		      "usage: calendar [-a] [-A days] [-B days] [-f calendarfile] [-t dd[.mm[.year]]]\n");
141	exit(1);
142}
143
144
145