1/*- 2 * panic.c - terminate fast in case of error 3 * 4 * SPDX-License-Identifier: BSD-2-Clause 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/* System Headers */ 31 32#include <err.h> 33#include <errno.h> 34#include <stdio.h> 35#include <stdlib.h> 36#include <unistd.h> 37 38/* Local headers */ 39 40#include "panic.h" 41#include "privs.h" 42#include "at.h" 43 44/* External variables */ 45 46/* Global functions */ 47 48void 49panic(const char *a) 50{ 51/* Something fatal has happened, print error message and exit. 52 */ 53 if (fcreated) { 54 PRIV_START 55 unlink(atfile); 56 PRIV_END 57 } 58 59 errx(EXIT_FAILURE, "%s", a); 60} 61 62void 63perr(const char *a) 64{ 65/* Some operating system error; print error message and exit. 66 */ 67 int serrno = errno; 68 69 if (fcreated) { 70 PRIV_START 71 unlink(atfile); 72 PRIV_END 73 } 74 75 errno = serrno; 76 err(EXIT_FAILURE, "%s", a); 77} 78 79void 80usage(void) 81{ 82 /* Print usage and exit. */ 83 fprintf(stderr, "usage: at [-q x] [-f file] [-m] time\n" 84 " at -c job [job ...]\n" 85 " at [-f file] -t [[CC]YY]MMDDhhmm[.SS]\n" 86 " at -r job [job ...]\n" 87 " at -l -q queuename\n" 88 " at -l [job ...]\n" 89 " atq [-q x] [-v]\n" 90 " atrm job [job ...]\n" 91 " batch [-f file] [-m]\n"); 92 exit(EXIT_FAILURE); 93} 94