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/* $NetBSD: dumptar.c,v 1.2 2008/04/28 20:22:51 martin Exp $ */
/*-
* Copyright (c) 2004 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Christos Zoulas.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdio.h>
#include <err.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/mman.h>
#include "tar.h"
#define ussum(a) 1
static char *
buf(const char *p, size_t s)
{
static char buf[1024];
(void)snprintf(buf, sizeof(buf), "%s", p);
buf[s] = '\0';
return buf;
}
int
intarg(const char *p, size_t s)
{
char *ep, *b = buf(p, s);
int r = (int)strtol(p, &ep, 8);
return r;
}
static int
usdump(void *p)
{
HD_USTAR *t = p;
int size = intarg(t->size, sizeof(t->size));
size = ((size + 511) / 512) * 512 + 512;
(void)fprintf(stdout, "*****\n");
#define PR(a) \
(void)fprintf(stdout, #a "=%s\n", buf(t->a, sizeof(t->a)));
#define IPR(a) \
(void)fprintf(stdout, #a "=%d\n", intarg(t->a, sizeof(t->a)));
#define OPR(a) \
(void)fprintf(stdout, #a "=%o\n", intarg(t->a, sizeof(t->a)));
PR(name);
OPR(mode);
IPR(uid);
IPR(gid);
IPR(size);
OPR(mtime);
OPR(chksum);
(void)fprintf(stdout, "typeflag=%c\n", t->typeflag);
PR(linkname);
PR(magic);
PR(version);
PR(uname);
PR(gname);
OPR(devmajor);
OPR(devminor);
PR(prefix);
return size;
}
int
main(int argc, char *argv[])
{
int fd;
struct stat st;
char *p, *ep;
if (argc != 2) {
(void)fprintf(stderr, "Usage: %s <filename>\n", getprogname());
return 1;
}
if ((fd = open(argv[1], O_RDONLY)) == -1)
err(1, "Cannot open `%s'", argv[1]);
if (fstat(fd, &st) == -1)
err(1, "Cannot fstat `%s'", argv[1]);
if ((p = mmap(NULL, (size_t)st.st_size, PROT_READ,
MAP_FILE|MAP_PRIVATE, fd, (off_t)0)) == MAP_FAILED)
err(1, "Cannot mmap `%s'", argv[1]);
(void)close(fd);
ep = (char *)p + (size_t)st.st_size;
for (; p < ep + sizeof(HD_USTAR);) {
if (ussum(p))
p += usdump(p);
}
return 0;
}
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