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