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 27 static const char rcsid[] = 28 "$FreeBSD$"; 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 "privs.h" 43 #include "at.h" 44 45 /* External variables */ 46 47 /* Global functions */ 48 49 void 50 panic(char *a) 51 { 52 /* Something fatal has happened, print error message and exit. 53 */ 54 if (fcreated) { 55 PRIV_START 56 unlink(atfile); 57 PRIV_END 58 } 59 60 errx(EXIT_FAILURE, "%s", a); 61 } 62 63 void 64 perr(char *a) 65 { 66 /* Some operating system error; print error message and exit. 67 */ 68 int serrno = errno; 69 70 if (fcreated) { 71 PRIV_START 72 unlink(atfile); 73 PRIV_END 74 } 75 76 errno = serrno; 77 err(EXIT_FAILURE, "%s", a); 78 } 79 80 void 81 usage(void) 82 { 83 /* Print usage and exit. */ 84 fprintf(stderr, "usage: at [-V] [-q x] [-f file] [-m] time\n" 85 " at [-V] -c job [job ...]\n" 86 " atq [-V] [-q x] [-v]\n" 87 " atrm [-V] job [job ...]\n" 88 " batch [-V] [-f file] [-m]\n"); 89 exit(EXIT_FAILURE); 90 } 91