diff options
Diffstat (limited to 'lib/libarchive/archive_write.c')
| -rw-r--r-- | lib/libarchive/archive_write.c | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/lib/libarchive/archive_write.c b/lib/libarchive/archive_write.c new file mode 100644 index 0000000..73283e4 --- /dev/null +++ b/lib/libarchive/archive_write.c @@ -0,0 +1,229 @@ +/*- + * 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 <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <time.h> +#include <unistd.h> + +#include "archive.h" +#include "archive_entry.h" +#include "archive_private.h" + +extern char **environ; + +/* + * Allocate, initialize and return an archive object. + */ +struct archive * +archive_write_new(void) +{ + struct archive *a; + unsigned 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, "archive_write_set_bytes_per_block"); + 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, "archive_write_set_bytes_in_last_block"); + 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, "archive_write_open"); + archive_string_empty(&a->error_string); + 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); +} + + +/* + * Close out the archive. + * + * 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. + */ +int +archive_write_close(struct archive *a) +{ + __archive_check_magic(a, ARCHIVE_WRITE_MAGIC, ARCHIVE_STATE_ANY, "archive_write_close"); + + /* 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); + + a->state = ARCHIVE_STATE_CLOSED; + return (ARCHIVE_OK); +} + +/* + * Destroy the archive structure. + */ +void +archive_write_finish(struct archive *a) +{ + __archive_check_magic(a, ARCHIVE_WRITE_MAGIC, ARCHIVE_STATE_ANY, "archive_write_finish"); + if (a->state != ARCHIVE_STATE_CLOSED) + archive_write_close(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, "archive_write_header"); + archive_string_empty(&a->error_string); + + /* Finish last entry. */ + if (a->state & ARCHIVE_STATE_DATA) + ((a->format_finish_entry)(a)); + + if (archive_entry_dev(entry) == a->skip_file_dev && + archive_entry_ino(entry) == a->skip_file_ino) { + archive_set_error(a, 0, "Can't add archive to itself"); + return (ARCHIVE_WARN); + } + + /* 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. + */ +/* Should be "ssize_t", but that breaks the ABI. <sigh> */ +int +archive_write_data(struct archive *a, const void *buff, size_t s) +{ + int ret; + __archive_check_magic(a, ARCHIVE_WRITE_MAGIC, ARCHIVE_STATE_DATA, "archive_write_data"); + archive_string_empty(&a->error_string); + ret = (a->format_write_data)(a, buff, s); + return (ret == ARCHIVE_OK ? (ssize_t)s : -1); +} |
