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      1 /*	$NetBSD: panic.c,v 1.14 2016/03/13 00:32:09 dholland Exp $	*/
      2 
      3 /*
      4  * panic.c - terminate fast in case of error
      5  * Copyright (c) 1993 by Thomas Koenig
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. The name of the author(s) may not be used to endorse or promote
     13  *    products derived from this software without specific prior written
     14  *    permission.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     23  * THEORY OF LIABILITY, WETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 /* System Headers */
     29 
     30 #include <err.h>
     31 #include <errno.h>
     32 #include <stdbool.h>
     33 #include <stdio.h>
     34 #include <stdlib.h>
     35 #include <unistd.h>
     36 
     37 /* Local headers */
     38 
     39 #include "panic.h"
     40 #include "at.h"
     41 #include "privs.h"
     42 
     43 /* File scope variables */
     44 
     45 #ifndef lint
     46 #if 0
     47 static char rcsid[] = "$OpenBSD: panic.c,v 1.4 1997/03/01 23:40:09 millert Exp $";
     48 #else
     49 __RCSID("$NetBSD: panic.c,v 1.14 2016/03/13 00:32:09 dholland Exp $");
     50 #endif
     51 #endif
     52 
     53 /* Global functions */
     54 
     55 __dead
     56 void
     57 panic(const char *a)
     58 {
     59 
     60 	/*
     61 	 * Something fatal has happened, print error message and exit.
     62 	 */
     63 	if (fcreated) {
     64 		privs_enter();
     65 		(void)unlink(atfile);
     66 		privs_exit();
     67 	}
     68 	errx(EXIT_FAILURE, "%s", a);
     69 }
     70 
     71 __dead
     72 void
     73 perr(const char *a)
     74 {
     75 
     76 	/*
     77 	 * Some operating system error; print error message and exit.
     78 	 */
     79 	perror(a);
     80 	if (fcreated) {
     81 		privs_enter();
     82 		(void)unlink(atfile);
     83 		privs_exit();
     84 	}
     85 	exit(EXIT_FAILURE);
     86 }
     87 
     88 __dead
     89 void
     90 privs_fail(const char *msg)
     91 {
     92 	perr(msg);
     93 }
     94 
     95 __dead
     96 void
     97 usage(void)
     98 {
     99 
    100 	/* Print usage and exit.  */
    101 	(void)fprintf(stderr,
    102 	    "usage: at [-bdlmrVv] [-f file] [-q queue] -t [[CC]YY]MMDDhhmm[.SS]\n"
    103 	    "       at [-bdlmrVv] [-f file] [-q queue] time\n"
    104 	    "       at [-V] -c job [job ...]\n"
    105 	    "       atq [-Vv] [-q queue]\n"
    106 	    "       atrm [-V] job [job ...]\n"
    107 	    "       batch [-mVv] [-f file] [-q queue] [-t [[CC]YY]MMDDhhmm[.SS]]\n"
    108 	    "       batch [-mVv] [-f file] [-q queue] [time]\n");
    109 	exit(EXIT_FAILURE);
    110 }
    111