freebsd-dev/lib/libarchive/archive_read_extract.c
Tim Kientzle b48b40f1f8 libarchive 2.2.3
* "compression_program" support uses an external program
  * Portability: no longer uses "struct stat" as a primary
    data interchange structure internally
  * Part of the above: refactor archive_entry to separate
    out copy_stat() and stat() functions
  * More complete tests for archive_entry
  * Finish archive_entry_clone()
  * Isolate major()/minor()/makedev() in archive_entry; remove
    these from everywhere else.
  * Bug fix: properly handle decompression look-ahead at end-of-data
  * Bug fixes to 'ar' support
  * Fix memory leak in ZIP reader
  * Portability: better timegm() emulation in iso9660 reader
  * New write_disk flags to suppress auto dir creation and not
    overwrite newer files (for future cpio front-end)
  * Simplify trailing-'/' fixup when writing tar and pax
  * Test enhancements:  fix various compiler warnings, improve
    portability, add lots of new tests.
  * Documentation: document new functions, first draft of
    libarchive_internals.3

MFC after: 14 days
Thanks to: Joerg Sonnenberger (compression_program)
Thanks to: Kai Wang (ar)
Thanks to: Colin Percival (many small fixes)
Thanks to: Many others who sent me various patches and problem reports.
2007-05-29 01:00:21 +00:00

171 lines
4.8 KiB
C

/*-
* Copyright (c) 2003-2007 Tim Kientzle
* All rights reserved.
*
* 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 AUTHOR(S) ``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 AUTHOR(S) 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 "archive_platform.h"
__FBSDID("$FreeBSD$");
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include "archive.h"
#include "archive_private.h"
#include "archive_read_private.h"
#include "archive_write_disk_private.h"
struct extract {
struct archive *ad; /* archive_write_disk object */
/* Progress function invoked during extract. */
void (*extract_progress)(void *);
void *extract_progress_user_data;
};
static int archive_read_extract_cleanup(struct archive_read *);
static int copy_data(struct archive *ar, struct archive *aw);
static struct extract *get_extract(struct archive_read *);
static struct extract *
get_extract(struct archive_read *a)
{
/* If we haven't initialized, do it now. */
/* This also sets up a lot of global state. */
if (a->extract == NULL) {
a->extract = (struct extract *)malloc(sizeof(*a->extract));
if (a->extract == NULL) {
archive_set_error(&a->archive, ENOMEM, "Can't extract");
return (NULL);
}
a->extract->ad = archive_write_disk_new();
if (a->extract->ad == NULL) {
archive_set_error(&a->archive, ENOMEM, "Can't extract");
return (NULL);
}
archive_write_disk_set_standard_lookup(a->extract->ad);
a->cleanup_archive_extract = archive_read_extract_cleanup;
}
return (a->extract);
}
int
archive_read_extract(struct archive *_a, struct archive_entry *entry, int flags)
{
struct archive_read *a = (struct archive_read *)_a;
struct extract *extract;
int r, r2;
extract = get_extract(a);
if (extract == NULL)
return (ARCHIVE_FATAL);
/* Set up for this particular entry. */
extract = a->extract;
archive_write_disk_set_options(a->extract->ad, flags);
archive_write_disk_set_skip_file(a->extract->ad,
a->skip_file_dev, a->skip_file_ino);
r = archive_write_header(a->extract->ad, entry);
if (r < ARCHIVE_WARN)
r = ARCHIVE_WARN;
if (r != ARCHIVE_OK)
/* If _write_header failed, copy the error. */
archive_copy_error(&a->archive, extract->ad);
else
/* Otherwise, pour data into the entry. */
r = copy_data(_a, a->extract->ad);
r2 = archive_write_finish_entry(a->extract->ad);
if (r2 < ARCHIVE_WARN)
r2 = ARCHIVE_WARN;
/* Use the first message. */
if (r2 != ARCHIVE_OK && r == ARCHIVE_OK)
archive_copy_error(&a->archive, extract->ad);
/* Use the worst error return. */
if (r2 < r)
r = r2;
return (r);
}
void
archive_read_extract_set_progress_callback(struct archive *_a,
void (*progress_func)(void *), void *user_data)
{
struct archive_read *a = (struct archive_read *)_a;
struct extract *extract = get_extract(a);
if (extract != NULL) {
extract->extract_progress = progress_func;
extract->extract_progress_user_data = user_data;
}
}
static int
copy_data(struct archive *ar, struct archive *aw)
{
int r;
const void *buff;
size_t size;
off_t offset;
for (;;) {
r = archive_read_data_block(ar, &buff, &size, &offset);
if (r == ARCHIVE_EOF)
return (ARCHIVE_OK);
if (r != ARCHIVE_OK)
return (r);
r = archive_write_data_block(aw, buff, size, offset);
if (r < ARCHIVE_WARN)
r = ARCHIVE_WARN;
if (r != ARCHIVE_OK) {
archive_set_error(ar, archive_errno(aw),
"%s", archive_error_string(aw));
return (r);
}
}
}
/*
* Cleanup function for archive_extract.
*/
static int
archive_read_extract_cleanup(struct archive_read *a)
{
int ret = ARCHIVE_OK;
#if ARCHIVE_API_VERSION > 1
ret =
#endif
archive_write_finish(a->extract->ad);
free(a->extract);
a->extract = NULL;
return (ret);
}