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