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/*
* libdpkg - Debian packaging suite library routines
* c-tarextract.c - test tar extractor
*
* Copyright © 2014 Guillem Jover <guillem@debian.org>
*
* This is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2,
* or (at your option) any later version.
*
* This is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <compat.h>
#include <sys/types.h>
#if HAVE_SYS_SYSMACROS_H
#include <sys/sysmacros.h> /* Needed on AIX for major()/minor(). */
#endif
#include <fcntl.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <dpkg/ehandle.h>
#include <dpkg/fdio.h>
#include <dpkg/buffer.h>
#include <dpkg/tarfn.h>
struct tar_context {
int tar_fd;
};
static int
tar_read(struct tar_archive *tar, char *buffer, int size)
{
struct tar_context *tc = tar->ctx;
return fd_read(tc->tar_fd, buffer, size);
}
static int
tar_object_skip(struct tar_archive *tar, struct tar_entry *te)
{
struct tar_context *tc = tar->ctx;
off_t size;
size = (te->size + TARBLKSZ - 1) / TARBLKSZ * TARBLKSZ;
if (size == 0)
return 0;
return fd_skip(tc->tar_fd, size, NULL);
}
static int
tar_object(struct tar_archive *tar, struct tar_entry *te)
{
printf("%s mode=%o time=%jd.%.9d uid=%d gid=%d", te->name,
te->stat.mode, te->mtime, 0, te->stat.uid, te->stat.gid);
if (te->stat.uname)
printf(" uname=%s", te->stat.uname);
if (te->stat.gname)
printf(" gname=%s", te->stat.gname);
switch (te->type) {
case TAR_FILETYPE_FILE0:
case TAR_FILETYPE_FILE:
tar_object_skip(tar, te);
printf(" type=file size=%jd", (intmax_t)te->size);
break;
case TAR_FILETYPE_HARDLINK:
printf(" type=hardlink linkto=%s size=%jd",
te->linkname, (intmax_t)te->size);
break;
case TAR_FILETYPE_SYMLINK:
printf(" type=symlink linkto=%s size=%jd",
te->linkname, (intmax_t)te->size);
break;
case TAR_FILETYPE_DIR:
printf(" type=dir");
break;
case TAR_FILETYPE_CHARDEV:
case TAR_FILETYPE_BLOCKDEV:
printf(" type=device id=%d.%d", major(te->dev), minor(te->dev));
break;
case TAR_FILETYPE_FIFO:
printf(" type=fifo");
break;
default:
ohshit("unexpected tar entry type '%c'", te->type);
}
printf("\n");
return 0;
}
struct tar_operations tar_ops = {
.read = tar_read,
.extract_file = tar_object,
.link = tar_object,
.symlink = tar_object,
.mkdir = tar_object,
.mknod = tar_object,
};
int
main(int argc, char **argv)
{
struct tar_archive tar;
struct tar_context tar_ctx;
const char *tar_name = argv[1];
setvbuf(stdout, NULL, _IOLBF, 0);
push_error_context();
if (tar_name) {
tar_ctx.tar_fd = open(tar_name, O_RDONLY);
if (tar_ctx.tar_fd < 0)
ohshite("cannot open file '%s'", tar_name);
} else {
tar_ctx.tar_fd = STDIN_FILENO;
}
tar.err = DPKG_ERROR_OBJECT;
tar.ctx = &tar_ctx;
tar.ops = &tar_ops;
if (tar_extractor(&tar))
ohshite("extracting tar");
dpkg_error_destroy(&tar.err);
if (tar_name)
close(tar_ctx.tar_fd);
pop_error_context(ehflag_normaltidy);
return 0;
}
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