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 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 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 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