fifolog_create.c revision 219027 
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: head/usr.sbin/fifolog/fifolog_create/fifolog_create.c 219027 2011-02-25 09:40:17Z phk $
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
41static void
42usage(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
49int
50main(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}
116