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 __FBSDID("$FreeBSD$"); 28 29 /* System Headers */ 30 31 #include <err.h> 32 #include <errno.h> 33 #include <stdio.h> 34 #include <stdlib.h> 35 #include <unistd.h> 36 37 /* Local headers */ 38 39 #include "panic.h" 40 #include "privs.h" 41 #include "at.h" 42 43 /* External variables */ 44 45 /* Global functions */ 46 47 void 48 panic(const char *a) 49 { 50 /* Something fatal has happened, print error message and exit. 51 */ 52 if (fcreated) { 53 PRIV_START 54 unlink(atfile); 55 PRIV_END 56 } 57 58 errx(EXIT_FAILURE, "%s", a); 59 } 60 61 void 62 perr(const char *a) 63 { 64 /* Some operating system error; print error message and exit. 65 */ 66 int serrno = errno; 67 68 if (fcreated) { 69 PRIV_START 70 unlink(atfile); 71 PRIV_END 72 } 73 74 errno = serrno; 75 err(EXIT_FAILURE, "%s", a); 76 } 77 78 void 79 usage(void) 80 { 81 /* Print usage and exit. */ 82 fprintf(stderr, "usage: at [-q x] [-f file] [-m] time\n" 83 " at -c job [job ...]\n" 84 " at [-f file] -t [[CC]YY]MMDDhhmm[.SS]\n" 85 " at -r job [job ...]\n" 86 " at -l -q queuename\n" 87 " at -l [job ...]\n" 88 " atq [-q x] [-v]\n" 89 " atrm job [job ...]\n" 90 " batch [-f file] [-m]\n"); 91 exit(EXIT_FAILURE); 92 } 93