panic.c revision 54158
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#ifndef lint 27static const char rcsid[] = 28 "$FreeBSD: head/usr.bin/at/panic.c 54158 1999-12-05 19:57:14Z charnier $"; 29#endif /* not lint */ 30 31/* System Headers */ 32 33#include <err.h> 34#include <errno.h> 35#include <stdio.h> 36#include <stdlib.h> 37#include <unistd.h> 38 39/* Local headers */ 40 41#include "panic.h" 42#include "at.h" 43 44/* External variables */ 45 46/* Global functions */ 47 48void 49panic(char *a) 50{ 51/* Something fatal has happened, print error message and exit. 52 */ 53 if (fcreated) 54 unlink(atfile); 55 56 errx(EXIT_FAILURE, "%s", a); 57} 58 59void 60perr(char *a) 61{ 62/* Some operating system error; print error message and exit. 63 */ 64 int serrno = errno; 65 66 if (fcreated) 67 unlink(atfile); 68 69 errno = serrno; 70 err(EXIT_FAILURE, "%s", a); 71} 72 73void 74usage(void) 75{ 76 /* Print usage and exit. */ 77 fprintf(stderr, "usage: at [-V] [-q x] [-f file] [-m] time\n" 78 " at [-V] -c job [job ...]\n" 79 " atq [-V] [-q x] [-v]\n" 80 " atrm [-V] job [job ...]\n" 81 " batch [-V] [-f file] [-m]\n"); 82 exit(EXIT_FAILURE); 83} 84