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/*-
* Copyright (c) 2003-2004 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
* in this position and unchanged.
* 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("$FreeBSD$");
/*
* This file contains the "essential" portions of the write API, that
* is, stuff that will essentially always be used by any client that
* actually needs to write a archive. Optional pieces have been, as
* far as possible, separated out into separate files to reduce
* needlessly bloating statically-linked clients.
*/
#include <sys/wait.h>
#include <limits.h>
#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <tar.h>
#include <time.h>
#include <unistd.h>
#include "archive.h"
#include "archive_private.h"
extern char **environ;
/*
* Allocate, initialize and return an archive object.
*/
struct archive *
archive_write_new(void)
{
struct archive *a;
char *nulls;
a = malloc(sizeof(*a));
if (a == NULL)
return (NULL);
memset(a, 0, sizeof(*a));
a->magic = ARCHIVE_WRITE_MAGIC;
a->user_uid = geteuid();
a->bytes_per_block = ARCHIVE_DEFAULT_BYTES_PER_BLOCK;
a->bytes_in_last_block = -1; /* Default */
a->state = ARCHIVE_STATE_NEW;
a->pformat_data = &(a->format_data);
/* Initialize a block of nulls for padding purposes. */
a->null_length = 1024;
nulls = malloc(a->null_length);
if (nulls == NULL) {
free(a);
return (NULL);
}
memset(nulls, 0, a->null_length);
a->nulls = nulls;
/*
* Set default compression, but don't set a default format.
* Were we to set a default format here, we would force every
* client to link in support for that format, even if they didn't
* ever use it.
*/
archive_write_set_compression_none(a);
return (a);
}
/*
* Set the block size. Returns 0 if successful.
*/
int
archive_write_set_bytes_per_block(struct archive *a, int bytes_per_block)
{
archive_check_magic(a, ARCHIVE_WRITE_MAGIC, ARCHIVE_STATE_NEW);
a->bytes_per_block = bytes_per_block;
return (ARCHIVE_OK);
}
/*
* Set the size for the last block.
* Returns 0 if successful.
*/
int
archive_write_set_bytes_in_last_block(struct archive *a, int bytes)
{
archive_check_magic(a, ARCHIVE_WRITE_MAGIC, ARCHIVE_STATE_ANY);
a->bytes_in_last_block = bytes;
return (ARCHIVE_OK);
}
/*
* Open the archive using the current settings.
*/
int
archive_write_open(struct archive *a, void *client_data,
archive_open_callback *opener, archive_write_callback *writer,
archive_close_callback *closer)
{
int ret;
ret = ARCHIVE_OK;
archive_check_magic(a, ARCHIVE_WRITE_MAGIC, ARCHIVE_STATE_NEW);
a->state = ARCHIVE_STATE_HEADER;
a->client_data = client_data;
a->client_writer = writer;
a->client_opener = opener;
a->client_closer = closer;
ret = (a->compression_init)(a);
if (a->format_init && ret == ARCHIVE_OK)
ret = (a->format_init)(a);
return (ret);
}
/*
* Cleanup and free the archive object.
*
* Be careful: user might just call write_new and then write_finish.
* Don't assume we actually wrote anything or performed any non-trivial
* initialization.
*/
void
archive_write_finish(struct archive *a)
{
archive_check_magic(a, ARCHIVE_WRITE_MAGIC, ARCHIVE_STATE_ANY);
/* Finish the last entry. */
if (a->state & ARCHIVE_STATE_DATA)
((a->format_finish_entry)(a));
/* Finish off the archive. */
if (a->format_finish != NULL)
(a->format_finish)(a);
/* Finish the compression and close the stream. */
if (a->compression_finish != NULL)
(a->compression_finish)(a);
/* Release various dynamic buffers. */
free((void *)(uintptr_t)(const void *)a->nulls);
archive_string_free(&a->error_string);
a->magic = 0;
free(a);
}
/*
* Write the appropriate header.
*/
int
archive_write_header(struct archive *a, struct archive_entry *entry)
{
int ret;
archive_check_magic(a, ARCHIVE_WRITE_MAGIC,
ARCHIVE_STATE_HEADER | ARCHIVE_STATE_DATA);
/* Finish last entry. */
if (a->state & ARCHIVE_STATE_DATA)
((a->format_finish_entry)(a));
/* Format and write header. */
ret = ((a->format_write_header)(a, entry));
a->state = ARCHIVE_STATE_DATA;
return (ret);
}
/*
* Note that the compressor is responsible for blocking.
*/
int
archive_write_data(struct archive *a, const void *buff, size_t s)
{
archive_check_magic(a, ARCHIVE_WRITE_MAGIC, ARCHIVE_STATE_DATA);
return (a->format_write_data(a, buff, s));
}
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