usr.bin/at/panic.c

   1 /*      $NetBSD: panic.c,v 1.12 2007/07/18 01:06:08 lukem 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 1.12 2007/07/18 01:06:08 lukem 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                 PRIV_START;
  65                 (void)unlink(atfile);
  66                 PRIV_END;
  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                 PRIV_START;
  82                 (void)unlink(atfile);
  83                 PRIV_END;
  84         }
  85         exit(EXIT_FAILURE);
  86 }
  87
  88 __dead
  89 void
  90 usage(void)
  91 {
  92
  93         /* Print usage and exit.  */
  94         (void)fprintf(stderr,
  95             "usage: at [-bdlmrVv] [-f file] [-q queue] -t [[CC]YY]MMDDhhmm[.SS]\n"
  96             "       at [-bdlmrVv] [-f file] [-q queue] time\n"
  97             "       at [-V] -c job [job ...]\n"
  98             "       atq [-Vv] [-q queue]\n"
  99             "       atrm [-V] job [job ...]\n"
 100             "       batch [-mVv] [-f file] [-q queue] [-t [[CC]YY]MMDDhhmm[.SS]]\n"
 101             "       batch [-mVv] [-f file] [-q queue] [time]\n");
 102         exit(EXIT_FAILURE);
 103 }