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 #include <sys/cdefs.h> 27 28 __FBSDID("$FreeBSD$"); 29 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 48 void 49 panic(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 62 void 63 perr(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 79 void 80 usage(void) 81 { 82 /* Print usage and exit. */ 83 fprintf(stderr, "usage: at [-V] [-q x] [-f file] [-m] time\n" 84 " at [-V] -c job [job ...]\n" 85 " atq [-V] [-q x] [-v]\n" 86 " atrm [-V] job [job ...]\n" 87 " batch [-V] [-f file] [-m]\n"); 88 exit(EXIT_FAILURE); 89 } 90