diff options
Diffstat (limited to 'src/libs/3rdparty/libarchive/archive_write.c')
| -rw-r--r-- | src/libs/3rdparty/libarchive/archive_write.c | 859 |
1 files changed, 859 insertions, 0 deletions
diff --git a/src/libs/3rdparty/libarchive/archive_write.c b/src/libs/3rdparty/libarchive/archive_write.c new file mode 100644 index 000000000..ec3c95c56 --- /dev/null +++ b/src/libs/3rdparty/libarchive/archive_write.c @@ -0,0 +1,859 @@ +/*- + * Copyright (c) 2003-2010 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: head/lib/libarchive/archive_write.c 201099 2009-12-28 03:03:00Z kientzle $"); + +/* + * 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 an archive. Optional pieces have been, as + * far as possible, separated out into separate files to reduce + * needlessly bloating statically-linked clients. + */ + +#ifdef HAVE_SYS_WAIT_H +#include <sys/wait.h> +#endif +#ifdef HAVE_ERRNO_H +#include <errno.h> +#endif +#ifdef HAVE_LIMITS_H +#include <limits.h> +#endif +#include <stdio.h> +#ifdef HAVE_STDLIB_H +#include <stdlib.h> +#endif +#ifdef HAVE_STRING_H +#include <string.h> +#endif +#include <time.h> +#ifdef HAVE_UNISTD_H +#include <unistd.h> +#endif + +#include "archive.h" +#include "archive_entry.h" +#include "archive_private.h" +#include "archive_write_private.h" + +static int _archive_filter_code(struct archive *, int); +static const char *_archive_filter_name(struct archive *, int); +static int64_t _archive_filter_bytes(struct archive *, int); +static int _archive_write_filter_count(struct archive *); +static int _archive_write_close(struct archive *); +static int _archive_write_free(struct archive *); +static int _archive_write_header(struct archive *, struct archive_entry *); +static int _archive_write_finish_entry(struct archive *); +static ssize_t _archive_write_data(struct archive *, const void *, size_t); + +struct archive_none { + size_t buffer_size; + size_t avail; + char *buffer; + char *next; +}; + +static const struct archive_vtable +archive_write_vtable = { + .archive_close = _archive_write_close, + .archive_filter_bytes = _archive_filter_bytes, + .archive_filter_code = _archive_filter_code, + .archive_filter_name = _archive_filter_name, + .archive_filter_count = _archive_write_filter_count, + .archive_free = _archive_write_free, + .archive_write_header = _archive_write_header, + .archive_write_finish_entry = _archive_write_finish_entry, + .archive_write_data = _archive_write_data, +}; + +/* + * Allocate, initialize and return an archive object. + */ +struct archive * +archive_write_new(void) +{ + struct archive_write *a; + unsigned char *nulls; + + a = (struct archive_write *)calloc(1, sizeof(*a)); + if (a == NULL) + return (NULL); + a->archive.magic = ARCHIVE_WRITE_MAGIC; + a->archive.state = ARCHIVE_STATE_NEW; + a->archive.vtable = &archive_write_vtable; + /* + * The value 10240 here matches the traditional tar default, + * but is otherwise arbitrary. + * TODO: Set the default block size from the format selected. + */ + a->bytes_per_block = 10240; + a->bytes_in_last_block = -1; /* Default */ + + /* Initialize a block of nulls for padding purposes. */ + a->null_length = 1024; + nulls = (unsigned char *)calloc(1, a->null_length); + if (nulls == NULL) { + free(a); + return (NULL); + } + a->nulls = nulls; + return (&a->archive); +} + +/* + * Set the block size. Returns 0 if successful. + */ +int +archive_write_set_bytes_per_block(struct archive *_a, int bytes_per_block) +{ + struct archive_write *a = (struct archive_write *)_a; + archive_check_magic(&a->archive, ARCHIVE_WRITE_MAGIC, + ARCHIVE_STATE_NEW, "archive_write_set_bytes_per_block"); + a->bytes_per_block = bytes_per_block; + return (ARCHIVE_OK); +} + +/* + * Get the current block size. -1 if it has never been set. + */ +int +archive_write_get_bytes_per_block(struct archive *_a) +{ + struct archive_write *a = (struct archive_write *)_a; + archive_check_magic(&a->archive, ARCHIVE_WRITE_MAGIC, + ARCHIVE_STATE_ANY, "archive_write_get_bytes_per_block"); + return (a->bytes_per_block); +} + +/* + * Set the size for the last block. + * Returns 0 if successful. + */ +int +archive_write_set_bytes_in_last_block(struct archive *_a, int bytes) +{ + struct archive_write *a = (struct archive_write *)_a; + archive_check_magic(&a->archive, ARCHIVE_WRITE_MAGIC, + ARCHIVE_STATE_ANY, "archive_write_set_bytes_in_last_block"); + a->bytes_in_last_block = bytes; + return (ARCHIVE_OK); +} + +/* + * Return the value set above. -1 indicates it has not been set. + */ +int +archive_write_get_bytes_in_last_block(struct archive *_a) +{ + struct archive_write *a = (struct archive_write *)_a; + archive_check_magic(&a->archive, ARCHIVE_WRITE_MAGIC, + ARCHIVE_STATE_ANY, "archive_write_get_bytes_in_last_block"); + return (a->bytes_in_last_block); +} + +/* + * dev/ino of a file to be rejected. Used to prevent adding + * an archive to itself recursively. + */ +int +archive_write_set_skip_file(struct archive *_a, la_int64_t d, la_int64_t i) +{ + struct archive_write *a = (struct archive_write *)_a; + archive_check_magic(&a->archive, ARCHIVE_WRITE_MAGIC, + ARCHIVE_STATE_ANY, "archive_write_set_skip_file"); + a->skip_file_set = 1; + a->skip_file_dev = d; + a->skip_file_ino = i; + return (ARCHIVE_OK); +} + +/* + * Allocate and return the next filter structure. + */ +struct archive_write_filter * +__archive_write_allocate_filter(struct archive *_a) +{ + struct archive_write *a = (struct archive_write *)_a; + struct archive_write_filter *f; + + f = calloc(1, sizeof(*f)); + + if (f == NULL) + return (NULL); + + f->archive = _a; + f->state = ARCHIVE_WRITE_FILTER_STATE_NEW; + if (a->filter_first == NULL) + a->filter_first = f; + else + a->filter_last->next_filter = f; + a->filter_last = f; + return f; +} + +/* + * Write data to a particular filter. + */ +int +__archive_write_filter(struct archive_write_filter *f, + const void *buff, size_t length) +{ + int r; + /* Never write to non-open filters */ + if (f->state != ARCHIVE_WRITE_FILTER_STATE_OPEN) + return(ARCHIVE_FATAL); + if (length == 0) + return(ARCHIVE_OK); + if (f->write == NULL) + /* If unset, a fatal error has already occurred, so this filter + * didn't open. We cannot write anything. */ + return(ARCHIVE_FATAL); + r = (f->write)(f, buff, length); + f->bytes_written += length; + return (r); +} + +/* + * Recursive function for opening the filter chain + * Last filter is opened first + */ +static int +__archive_write_open_filter(struct archive_write_filter *f) +{ + int ret; + + ret = ARCHIVE_OK; + if (f->next_filter != NULL) + ret = __archive_write_open_filter(f->next_filter); + if (ret != ARCHIVE_OK) + return (ret); + if (f->state != ARCHIVE_WRITE_FILTER_STATE_NEW) + return (ARCHIVE_FATAL); + if (f->open == NULL) { + f->state = ARCHIVE_WRITE_FILTER_STATE_OPEN; + return (ARCHIVE_OK); + } + ret = (f->open)(f); + if (ret == ARCHIVE_OK) + f->state = ARCHIVE_WRITE_FILTER_STATE_OPEN; + else + f->state = ARCHIVE_WRITE_FILTER_STATE_FATAL; + return (ret); +} + +/* + * Open all filters + */ +static int +__archive_write_filters_open(struct archive_write *a) +{ + return (__archive_write_open_filter(a->filter_first)); +} + +/* + * Close all filtes + */ +static int +__archive_write_filters_close(struct archive_write *a) +{ + struct archive_write_filter *f; + int ret, ret1; + ret = ARCHIVE_OK; + for (f = a->filter_first; f != NULL; f = f->next_filter) { + /* Do not close filters that are not open */ + if (f->state == ARCHIVE_WRITE_FILTER_STATE_OPEN) { + if (f->close != NULL) { + ret1 = (f->close)(f); + if (ret1 < ret) + ret = ret1; + if (ret1 == ARCHIVE_OK) { + f->state = + ARCHIVE_WRITE_FILTER_STATE_CLOSED; + } else { + f->state = + ARCHIVE_WRITE_FILTER_STATE_FATAL; + } + } else + f->state = ARCHIVE_WRITE_FILTER_STATE_CLOSED; + } + } + return (ret); +} + +int +__archive_write_output(struct archive_write *a, const void *buff, size_t length) +{ + return (__archive_write_filter(a->filter_first, buff, length)); +} + +static int +__archive_write_filters_flush(struct archive_write *a) +{ + struct archive_write_filter *f; + int ret, ret1; + + ret = ARCHIVE_OK; + for (f = a->filter_first; f != NULL; f = f->next_filter) { + if (f->flush != NULL && f->bytes_written > 0) { + ret1 = (f->flush)(f); + if (ret1 < ret) + ret = ret1; + if (ret1 < ARCHIVE_WARN) + f->state = ARCHIVE_WRITE_FILTER_STATE_FATAL; + } + } + return (ret); +} + +int +__archive_write_nulls(struct archive_write *a, size_t length) +{ + if (length == 0) + return (ARCHIVE_OK); + + while (length > 0) { + size_t to_write = length < a->null_length ? length : a->null_length; + int r = __archive_write_output(a, a->nulls, to_write); + if (r < ARCHIVE_OK) + return (r); + length -= to_write; + } + return (ARCHIVE_OK); +} + +static int +archive_write_client_open(struct archive_write_filter *f) +{ + struct archive_write *a = (struct archive_write *)f->archive; + struct archive_none *state; + void *buffer; + size_t buffer_size; + int ret; + + f->bytes_per_block = archive_write_get_bytes_per_block(f->archive); + f->bytes_in_last_block = + archive_write_get_bytes_in_last_block(f->archive); + buffer_size = f->bytes_per_block; + + state = (struct archive_none *)calloc(1, sizeof(*state)); + buffer = (char *)malloc(buffer_size); + if (state == NULL || buffer == NULL) { + free(state); + free(buffer); + archive_set_error(f->archive, ENOMEM, + "Can't allocate data for output buffering"); + return (ARCHIVE_FATAL); + } + + state->buffer_size = buffer_size; + state->buffer = buffer; + state->next = state->buffer; + state->avail = state->buffer_size; + f->data = state; + + if (a->client_opener == NULL) + return (ARCHIVE_OK); + ret = a->client_opener(f->archive, a->client_data); + if (ret != ARCHIVE_OK) { + free(state->buffer); + free(state); + f->data = NULL; + } + return (ret); +} + +static int +archive_write_client_write(struct archive_write_filter *f, + const void *_buff, size_t length) +{ + struct archive_write *a = (struct archive_write *)f->archive; + struct archive_none *state = (struct archive_none *)f->data; + const char *buff = (const char *)_buff; + ssize_t remaining, to_copy; + ssize_t bytes_written; + + remaining = length; + + /* + * If there is no buffer for blocking, just pass the data + * straight through to the client write callback. In + * particular, this supports "no write delay" operation for + * special applications. Just set the block size to zero. + */ + if (state->buffer_size == 0) { + while (remaining > 0) { + bytes_written = (a->client_writer)(&a->archive, + a->client_data, buff, remaining); + if (bytes_written <= 0) + return (ARCHIVE_FATAL); + remaining -= bytes_written; + buff += bytes_written; + } + return (ARCHIVE_OK); + } + + /* If the copy buffer isn't empty, try to fill it. */ + if (state->avail < state->buffer_size) { + /* If buffer is not empty... */ + /* ... copy data into buffer ... */ + to_copy = ((size_t)remaining > state->avail) ? + state->avail : (size_t)remaining; + memcpy(state->next, buff, to_copy); + state->next += to_copy; + state->avail -= to_copy; + buff += to_copy; + remaining -= to_copy; + /* ... if it's full, write it out. */ + if (state->avail == 0) { + char *p = state->buffer; + size_t to_write = state->buffer_size; + while (to_write > 0) { + bytes_written = (a->client_writer)(&a->archive, + a->client_data, p, to_write); + if (bytes_written <= 0) + return (ARCHIVE_FATAL); + if ((size_t)bytes_written > to_write) { + archive_set_error(&(a->archive), + -1, "write overrun"); + return (ARCHIVE_FATAL); + } + p += bytes_written; + to_write -= bytes_written; + } + state->next = state->buffer; + state->avail = state->buffer_size; + } + } + + while ((size_t)remaining >= state->buffer_size) { + /* Write out full blocks directly to client. */ + bytes_written = (a->client_writer)(&a->archive, + a->client_data, buff, state->buffer_size); + if (bytes_written <= 0) + return (ARCHIVE_FATAL); + buff += bytes_written; + remaining -= bytes_written; + } + + if (remaining > 0) { + /* Copy last bit into copy buffer. */ + memcpy(state->next, buff, remaining); + state->next += remaining; + state->avail -= remaining; + } + return (ARCHIVE_OK); +} + +static int +archive_write_client_free(struct archive_write_filter *f) +{ + struct archive_write *a = (struct archive_write *)f->archive; + + if (a->client_freer) + (*a->client_freer)(&a->archive, a->client_data); + a->client_data = NULL; + + /* Clear passphrase. */ + if (a->passphrase != NULL) { + memset(a->passphrase, 0, strlen(a->passphrase)); + free(a->passphrase); + a->passphrase = NULL; + } + + return (ARCHIVE_OK); +} + +static int +archive_write_client_close(struct archive_write_filter *f) +{ + struct archive_write *a = (struct archive_write *)f->archive; + struct archive_none *state = (struct archive_none *)f->data; + ssize_t block_length; + ssize_t target_block_length; + ssize_t bytes_written; + size_t to_write; + char *p; + int ret = ARCHIVE_OK; + + /* If there's pending data, pad and write the last block */ + if (state->next != state->buffer) { + block_length = state->buffer_size - state->avail; + + /* Tricky calculation to determine size of last block */ + if (a->bytes_in_last_block <= 0) + /* Default or Zero: pad to full block */ + target_block_length = a->bytes_per_block; + else + /* Round to next multiple of bytes_in_last_block. */ + target_block_length = a->bytes_in_last_block * + ( (block_length + a->bytes_in_last_block - 1) / + a->bytes_in_last_block); + if (target_block_length > a->bytes_per_block) + target_block_length = a->bytes_per_block; + if (block_length < target_block_length) { + memset(state->next, 0, + target_block_length - block_length); + block_length = target_block_length; + } + p = state->buffer; + to_write = block_length; + while (to_write > 0) { + bytes_written = (a->client_writer)(&a->archive, + a->client_data, p, to_write); + if (bytes_written <= 0) { + ret = ARCHIVE_FATAL; + break; + } + if ((size_t)bytes_written > to_write) { + archive_set_error(&(a->archive), + -1, "write overrun"); + ret = ARCHIVE_FATAL; + break; + } + p += bytes_written; + to_write -= bytes_written; + } + } + if (a->client_closer) + (*a->client_closer)(&a->archive, a->client_data); + free(state->buffer); + free(state); + + /* Clear the close handler myself not to be called again. */ + f->state = ARCHIVE_WRITE_FILTER_STATE_CLOSED; + return (ret); +} + +/* + * Open the archive using the current settings. + */ +int +archive_write_open2(struct archive *_a, void *client_data, + archive_open_callback *opener, archive_write_callback *writer, + archive_close_callback *closer, archive_free_callback *freer) +{ + struct archive_write *a = (struct archive_write *)_a; + struct archive_write_filter *client_filter; + int ret, r1; + + archive_check_magic(&a->archive, ARCHIVE_WRITE_MAGIC, + ARCHIVE_STATE_NEW, "archive_write_open"); + archive_clear_error(&a->archive); + + a->client_writer = writer; + a->client_opener = opener; + a->client_closer = closer; + a->client_freer = freer; + a->client_data = client_data; + + client_filter = __archive_write_allocate_filter(_a); + + if (client_filter == NULL) + return (ARCHIVE_FATAL); + + client_filter->open = archive_write_client_open; + client_filter->write = archive_write_client_write; + client_filter->close = archive_write_client_close; + client_filter->free = archive_write_client_free; + + ret = __archive_write_filters_open(a); + if (ret < ARCHIVE_WARN) { + r1 = __archive_write_filters_close(a); + __archive_write_filters_free(_a); + return (r1 < ret ? r1 : ret); + } + + a->archive.state = ARCHIVE_STATE_HEADER; + if (a->format_init) + ret = (a->format_init)(a); + return (ret); +} + +int +archive_write_open(struct archive *_a, void *client_data, + archive_open_callback *opener, archive_write_callback *writer, + archive_close_callback *closer) +{ + return archive_write_open2(_a, client_data, opener, writer, + closer, NULL); +} + +/* + * Close out the archive. + */ +static int +_archive_write_close(struct archive *_a) +{ + struct archive_write *a = (struct archive_write *)_a; + int r = ARCHIVE_OK, r1 = ARCHIVE_OK; + + archive_check_magic(&a->archive, ARCHIVE_WRITE_MAGIC, + ARCHIVE_STATE_ANY | ARCHIVE_STATE_FATAL, + "archive_write_close"); + if (a->archive.state == ARCHIVE_STATE_NEW + || a->archive.state == ARCHIVE_STATE_CLOSED) + return (ARCHIVE_OK); /* Okay to close() when not open. */ + + archive_clear_error(&a->archive); + + /* Finish the last entry if a finish callback is specified */ + if (a->archive.state == ARCHIVE_STATE_DATA + && a->format_finish_entry != NULL) + r = ((a->format_finish_entry)(a)); + + /* Finish off the archive. */ + /* TODO: have format closers invoke compression close. */ + if (a->format_close != NULL) { + r1 = (a->format_close)(a); + if (r1 < r) + r = r1; + } + + /* Finish the compression and close the stream. */ + r1 = __archive_write_filters_close(a); + if (r1 < r) + r = r1; + + if (a->archive.state != ARCHIVE_STATE_FATAL) + a->archive.state = ARCHIVE_STATE_CLOSED; + return (r); +} + +static int +_archive_write_filter_count(struct archive *_a) +{ + struct archive_write *a = (struct archive_write *)_a; + struct archive_write_filter *p = a->filter_first; + int count = 0; + while(p) { + count++; + p = p->next_filter; + } + return count; +} + +void +__archive_write_filters_free(struct archive *_a) +{ + struct archive_write *a = (struct archive_write *)_a; + int r = ARCHIVE_OK, r1; + + while (a->filter_first != NULL) { + struct archive_write_filter *next + = a->filter_first->next_filter; + if (a->filter_first->free != NULL) { + r1 = (*a->filter_first->free)(a->filter_first); + if (r > r1) + r = r1; + } + free(a->filter_first); + a->filter_first = next; + } + a->filter_last = NULL; +} + +/* + * Destroy the archive structure. + * + * Be careful: user might just call write_new and then write_free. + * Don't assume we actually wrote anything or performed any non-trivial + * initialization. + */ +static int +_archive_write_free(struct archive *_a) +{ + struct archive_write *a = (struct archive_write *)_a; + int r = ARCHIVE_OK, r1; + + if (_a == NULL) + return (ARCHIVE_OK); + /* It is okay to call free() in state FATAL. */ + archive_check_magic(&a->archive, ARCHIVE_WRITE_MAGIC, + ARCHIVE_STATE_ANY | ARCHIVE_STATE_FATAL, "archive_write_free"); + if (a->archive.state != ARCHIVE_STATE_FATAL) + r = archive_write_close(&a->archive); + + /* Release format resources. */ + if (a->format_free != NULL) { + r1 = (a->format_free)(a); + if (r1 < r) + r = r1; + } + + __archive_write_filters_free(_a); + + /* Release various dynamic buffers. */ + free((void *)(uintptr_t)(const void *)a->nulls); + archive_string_free(&a->archive.error_string); + if (a->passphrase != NULL) { + /* A passphrase should be cleaned. */ + memset(a->passphrase, 0, strlen(a->passphrase)); + free(a->passphrase); + } + a->archive.magic = 0; + __archive_clean(&a->archive); + free(a); + return (r); +} + +/* + * Write the appropriate header. + */ +static int +_archive_write_header(struct archive *_a, struct archive_entry *entry) +{ + struct archive_write *a = (struct archive_write *)_a; + int ret, r2; + + archive_check_magic(&a->archive, ARCHIVE_WRITE_MAGIC, + ARCHIVE_STATE_DATA | ARCHIVE_STATE_HEADER, "archive_write_header"); + archive_clear_error(&a->archive); + + if (a->format_write_header == NULL) { + archive_set_error(&(a->archive), -1, + "Format must be set before you can write to an archive."); + a->archive.state = ARCHIVE_STATE_FATAL; + return (ARCHIVE_FATAL); + } + + /* In particular, "retry" and "fatal" get returned immediately. */ + ret = archive_write_finish_entry(&a->archive); + if (ret == ARCHIVE_FATAL) { + a->archive.state = ARCHIVE_STATE_FATAL; + return (ARCHIVE_FATAL); + } + if (ret < ARCHIVE_OK && ret != ARCHIVE_WARN) + return (ret); + + if (a->skip_file_set && + archive_entry_dev_is_set(entry) && + archive_entry_ino_is_set(entry) && + archive_entry_dev(entry) == (dev_t)a->skip_file_dev && + archive_entry_ino64(entry) == a->skip_file_ino) { + archive_set_error(&a->archive, 0, + "Can't add archive to itself"); + return (ARCHIVE_FAILED); + } + + /* Flush filters at boundary. */ + r2 = __archive_write_filters_flush(a); + if (r2 == ARCHIVE_FAILED) { + return (ARCHIVE_FAILED); + } + if (r2 == ARCHIVE_FATAL) { + a->archive.state = ARCHIVE_STATE_FATAL; + return (ARCHIVE_FATAL); + } + if (r2 < ret) + ret = r2; + + /* Format and write header. */ + r2 = ((a->format_write_header)(a, entry)); + if (r2 == ARCHIVE_FAILED) { + return (ARCHIVE_FAILED); + } + if (r2 == ARCHIVE_FATAL) { + a->archive.state = ARCHIVE_STATE_FATAL; + return (ARCHIVE_FATAL); + } + if (r2 < ret) + ret = r2; + + a->archive.state = ARCHIVE_STATE_DATA; + return (ret); +} + +static int +_archive_write_finish_entry(struct archive *_a) +{ + struct archive_write *a = (struct archive_write *)_a; + int ret = ARCHIVE_OK; + + archive_check_magic(&a->archive, ARCHIVE_WRITE_MAGIC, + ARCHIVE_STATE_HEADER | ARCHIVE_STATE_DATA, + "archive_write_finish_entry"); + if (a->archive.state & ARCHIVE_STATE_DATA + && a->format_finish_entry != NULL) + ret = (a->format_finish_entry)(a); + a->archive.state = ARCHIVE_STATE_HEADER; + return (ret); +} + +/* + * Note that the compressor is responsible for blocking. + */ +static ssize_t +_archive_write_data(struct archive *_a, const void *buff, size_t s) +{ + struct archive_write *a = (struct archive_write *)_a; + const size_t max_write = INT_MAX; + + archive_check_magic(&a->archive, ARCHIVE_WRITE_MAGIC, + ARCHIVE_STATE_DATA, "archive_write_data"); + /* In particular, this catches attempts to pass negative values. */ + if (s > max_write) + s = max_write; + archive_clear_error(&a->archive); + return ((a->format_write_data)(a, buff, s)); +} + +static struct archive_write_filter * +filter_lookup(struct archive *_a, int n) +{ + struct archive_write *a = (struct archive_write *)_a; + struct archive_write_filter *f = a->filter_first; + if (n == -1) + return a->filter_last; + if (n < 0) + return NULL; + while (n > 0 && f != NULL) { + f = f->next_filter; + --n; + } + return f; +} + +static int +_archive_filter_code(struct archive *_a, int n) +{ + struct archive_write_filter *f = filter_lookup(_a, n); + return f == NULL ? -1 : f->code; +} + +static const char * +_archive_filter_name(struct archive *_a, int n) +{ + struct archive_write_filter *f = filter_lookup(_a, n); + return f != NULL ? f->name : NULL; +} + +static int64_t +_archive_filter_bytes(struct archive *_a, int n) +{ + struct archive_write_filter *f = filter_lookup(_a, n); + return f == NULL ? -1 : f->bytes_written; +} |