1/*-
2 *  panic.c - terminate fast in case of error
3 *
4 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
5 *
6 *  Copyright (C) 1993  Thomas Koenig
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. The name of the author(s) may not be used to endorse or promote
14 *    products derived from this software without specific prior written
15 *    permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
30__FBSDID("$FreeBSD: stable/11/usr.bin/at/panic.c 330449 2018-03-05 07:26:05Z eadler $");
31
32/* System Headers */
33
34#include <err.h>
35#include <errno.h>
36#include <stdio.h>
37#include <stdlib.h>
38#include <unistd.h>
39
40/* Local headers */
41
42#include "panic.h"
43#include "privs.h"
44#include "at.h"
45
46/* External variables */
47
48/* Global functions */
49
50void
51panic(const char *a)
52{
53/* Something fatal has happened, print error message and exit.
54 */
55	if (fcreated) {
56		PRIV_START
57		unlink(atfile);
58		PRIV_END
59	}
60
61	errx(EXIT_FAILURE, "%s", a);
62}
63
64void
65perr(const char *a)
66{
67/* Some operating system error; print error message and exit.
68 */
69	int serrno = errno;
70
71	if (fcreated) {
72		PRIV_START
73		unlink(atfile);
74		PRIV_END
75	}
76
77	errno = serrno;
78	err(EXIT_FAILURE, "%s", a);
79}
80
81void
82usage(void)
83{
84	/* Print usage and exit. */
85    fprintf(stderr, "usage: at [-q x] [-f file] [-m] time\n"
86		    "       at -c job [job ...]\n"
87		    "       at [-f file] -t [[CC]YY]MMDDhhmm[.SS]\n"
88		    "       at -r job [job ...]\n"
89		    "       at -l -q queuename\n"
90		    "       at -l [job ...]\n"
91		    "       atq [-q x] [-v]\n"
92		    "       atrm job [job ...]\n"
93		    "       batch [-f file] [-m]\n");
94    exit(EXIT_FAILURE);
95}
96