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panic.c revision 1.1 
      1 /*
      2  * panic.c - terminate fast in case of error
      3  * Copyright (c) 1993 by Thomas Koenig
      4  * All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. The name of the author(s) may not be used to endorse or promote
     12  *    products derived from this software without specific prior written
     13  *    permission.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
     16  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     17  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     18  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     19  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     20  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     21  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     22  * THEORY OF LIABILITY, WETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     23  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     24  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     25  */
     26 
     27 /* System Headers */
     28 
     29 #include <errno.h>
     30 #include <stdio.h>
     31 #include <stdlib.h>
     32 #include <unistd.h>
     33 
     34 /* Local headers */
     35 
     36 #include "panic.h"
     37 #include "at.h"
     38 
     39 /* File scope variables */
     40 
     41 static char rcsid[] = "$Id: panic.c,v 1.1 1993/12/05 11:36:51 cgd Exp $";
     42 
     43 /* External variables */
     44 
     45 /* Global functions */
     46 
     47 void
     48 panic(a)
     49 	char *a;
     50 {
     51 /* Something fatal has happened, print error message and exit.
     52  */
     53 	fprintf(stderr, "%s: %s\n", namep, a);
     54 	if (fcreated)
     55 		unlink(atfile);
     56 
     57 	exit(EXIT_FAILURE);
     58 }
     59 
     60 void
     61 perr(a)
     62 	char *a;
     63 {
     64 /* Some operating system error; print error message and exit.
     65  */
     66 	perror(a);
     67 	if (fcreated)
     68 		unlink(atfile);
     69 
     70 	exit(EXIT_FAILURE);
     71 }
     72 
     73 void
     74 perr2(a, b)
     75 	char *a, *b;
     76 {
     77 	fprintf(stderr, "%s", a);
     78 	perr(b);
     79 }
     80 
     81 void
     82 usage(void)
     83 {
     84 /* Print usage and exit.
     85 */
     86 	fprintf(stderr, "Usage: at [-q x] [-f file] [-m] time\n"
     87 	    "       atq [-q x] [-v]\n"
     88 	    "       atrm [-q x] job ...\n"
     89 	    "       batch [-f file] [-m]\n");
     90 	exit(EXIT_FAILURE);
     91 }
     92