panic.c revision 87208 
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#ifndef lint
27static const char rcsid[] =
28  "$FreeBSD: head/usr.bin/at/panic.c 87208 2001-12-02 12:26:18Z markm $";
29#endif /* not lint */
30
31/* System Headers */
32
33#include <err.h>
34#include <errno.h>
35#include <stdio.h>
36#include <stdlib.h>
37#include <unistd.h>
38
39/* Local headers */
40
41#include "panic.h"
42#include "privs.h"
43#include "at.h"
44
45/* External variables */
46
47/* Global functions */
48
49void
50panic(const char *a)
51{
52/* Something fatal has happened, print error message and exit.
53 */
54	if (fcreated) {
55		PRIV_START
56		unlink(atfile);
57		PRIV_END
58	}
59
60	errx(EXIT_FAILURE, "%s", a);
61}
62
63void
64perr(const char *a)
65{
66/* Some operating system error; print error message and exit.
67 */
68	int serrno = errno;
69
70	if (fcreated) {
71		PRIV_START
72		unlink(atfile);
73		PRIV_END
74	}
75
76	errno = serrno;
77	err(EXIT_FAILURE, "%s", a);
78}
79
80void
81usage(void)
82{
83	/* Print usage and exit. */
84    fprintf(stderr, "usage: at [-V] [-q x] [-f file] [-m] time\n"
85		    "       at [-V] -c job [job ...]\n"
86		    "       atq [-V] [-q x] [-v]\n"
87		    "       atrm [-V] job [job ...]\n"
88		    "       batch [-V] [-f file] [-m]\n");
89    exit(EXIT_FAILURE);
90}
91