panic.c revision 41556 
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/* System Headers */
27
28#include <errno.h>
29#include <stdio.h>
30#include <stdlib.h>
31#include <unistd.h>
32
33/* Local headers */
34
35#include "panic.h"
36#include "at.h"
37
38/* File scope variables */
39
40static const char rcsid[] =
41	"$Id: panic.c,v 1.7 1997/06/23 06:44:18 charnier Exp $";
42
43/* External variables */
44
45/* Global functions */
46
47void
48panic(char *a)
49{
50/* Something fatal has happened, print error message and exit.
51 */
52	fprintf(stderr,"%s: %s\n",namep,a);
53	if (fcreated)
54		unlink(atfile);
55
56	exit (EXIT_FAILURE);
57}
58
59void
60perr(char *a)
61{
62/* Some operating system error; print error message and exit.
63 */
64	perror(a);
65	if (fcreated)
66		unlink(atfile);
67
68	exit(EXIT_FAILURE);
69}
70
71void
72usage(void)
73{
74	/* Print usage and exit. */
75    fprintf(stderr, "usage: at [-V] [-q x] [-f file] [-m] time\n"
76		    "       at [-V] -c job [job ...]\n"
77		    "       atq [-V] [-q x] [-v]\n"
78		    "       atrm [-V] job [job ...]\n"
79		    "       batch [-V] [-f file] [-m]\n");
80    exit(EXIT_FAILURE);
81}
82