usr.sbin/fifolog/fifolog_create/fifolog_create.c

   1 /*-
   2  * Copyright (c) 2005-2008 Poul-Henning Kamp
   3  * All rights reserved.
   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. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  *
  14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  24  * SUCH DAMAGE.
  25  *
  26  * $FreeBSD$
  27  */
  28
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <sysexits.h>
  32 #include <unistd.h>
  33 #include <err.h>
  34 #include <libutil.h>
  35
  36 #include "libfifolog.h"
  37
  38 #define DEF_RECSIZE     512
  39 #define DEF_RECCNT      (24 * 60 * 60)
  40
  41 static void
  42 usage(void)
  43 {
  44         fprintf(stderr, "Usage: fifolog_create [-l record-size] "
  45             "[-r record-count] [-s size] file\n");
  46         exit(EX_USAGE);
  47 }
  48
  49 int
  50 main(int argc, char * const *argv)
  51 {
  52         int ch;
  53         int64_t size;
  54         int64_t recsize;
  55         int64_t reccnt;
  56         const char *s;
  57
  58         recsize = 0;
  59         size = 0;
  60         reccnt = 0;
  61         while((ch = getopt(argc, argv, "l:r:s:")) != -1) {
  62                 switch (ch) {
  63                 case 'l':
  64                         if (expand_number(optarg, &recsize))
  65                                 err(1, "Couldn't parse -l argument");
  66                         break;
  67                 case 'r':
  68                         if (expand_number(optarg, &reccnt))
  69                                 err(1, "Couldn't parse -r argument");
  70                         break;
  71                 case 's':
  72                         if (expand_number(optarg, &size))
  73                                 err(1, "Couldn't parse -s argument");
  74                         break;
  75                 default:
  76                         usage();
  77                 }
  78         }
  79         argc -= optind;
  80         argv += optind;
  81         if (argc != 1)
  82                 usage();
  83
  84         if (size != 0 && reccnt != 0 && recsize != 0) {         /* N N N */
  85                 if (size !=  reccnt * recsize)
  86                         errx(1, "Inconsistent -l, -r and -s values");
  87         } else if (size != 0 && reccnt != 0 && recsize == 0) {  /* N N Z */
  88                 if (size % reccnt)
  89                         errx(1,
  90                             "Inconsistent -r and -s values (gives remainder)");
  91                 recsize = size / reccnt;
  92         } else if (size != 0 && reccnt == 0 && recsize != 0) {  /* N Z N */
  93                 if (size % recsize)
  94                     errx(1, "-s arg not divisible by -l arg");
  95         } else if (size != 0 && reccnt == 0 && recsize == 0) {  /* N Z Z */
  96                 recsize = DEF_RECSIZE;
  97                 if (size % recsize)
  98                     errx(1, "-s arg not divisible by %jd", recsize);
  99         } else if (size == 0 && reccnt != 0 && recsize != 0) {  /* Z N N */
 100                 size = reccnt * recsize;
 101         } else if (size == 0 && reccnt != 0 && recsize == 0) {  /* Z N Z */
 102                 recsize = DEF_RECSIZE;
 103                 size = reccnt * recsize;
 104         } else if (size == 0 && reccnt == 0 && recsize != 0) {  /* Z Z N */
 105                 size = DEF_RECCNT * recsize;
 106         } else if (size == 0 && reccnt == 0 && recsize == 0) {  /* Z Z Z */
 107                 recsize = DEF_RECSIZE;
 108                 size = DEF_RECCNT * recsize;
 109         }
 110
 111         s = fifolog_create(argv[0], size, recsize);
 112         if (s == NULL)
 113                 return (0);
 114         err(1, "%s", s);
 115 }