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("$FreeBSD$");
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
50 void
panic(const char * a)51 panic(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
64 void
perr(const char * a)65 perr(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
81 void
usage(void)82 usage(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