9ecbbbafd0
First step to add packPNM support.
500 lines
14 KiB
C
500 lines
14 KiB
C
/*-
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* Copyright (c) 2003-2007 Tim Kientzle
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* Copyright (c) 2011-2012 Michihiro NAKAJIMA
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "archive_platform.h"
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__FBSDID("$FreeBSD: head/lib/libarchive/archive_write_set_format_cpio.c 201170 2009-12-29 06:34:23Z kientzle $");
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#ifdef HAVE_ERRNO_H
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#include <errno.h>
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#endif
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#include <stdio.h>
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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#ifdef HAVE_STRING_H
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#include <string.h>
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#endif
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#include "archive.h"
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#include "archive_entry.h"
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#include "archive_entry_locale.h"
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#include "archive_private.h"
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#include "archive_write_private.h"
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static ssize_t archive_write_cpio_data(struct archive_write *,
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const void *buff, size_t s);
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static int archive_write_cpio_close(struct archive_write *);
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static int archive_write_cpio_free(struct archive_write *);
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static int archive_write_cpio_finish_entry(struct archive_write *);
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static int archive_write_cpio_header(struct archive_write *,
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struct archive_entry *);
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static int archive_write_cpio_options(struct archive_write *,
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const char *, const char *);
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static int format_octal(int64_t, void *, int);
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static int64_t format_octal_recursive(int64_t, char *, int);
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static int write_header(struct archive_write *, struct archive_entry *);
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struct cpio {
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uint64_t entry_bytes_remaining;
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int64_t ino_next;
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struct { int64_t old; int new;} *ino_list;
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size_t ino_list_size;
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size_t ino_list_next;
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struct archive_string_conv *opt_sconv;
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struct archive_string_conv *sconv_default;
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int init_default_conversion;
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};
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#define c_magic_offset 0
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#define c_magic_size 6
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#define c_dev_offset 6
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#define c_dev_size 6
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#define c_ino_offset 12
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#define c_ino_size 6
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#define c_mode_offset 18
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#define c_mode_size 6
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#define c_uid_offset 24
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#define c_uid_size 6
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#define c_gid_offset 30
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#define c_gid_size 6
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#define c_nlink_offset 36
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#define c_nlink_size 6
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#define c_rdev_offset 42
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#define c_rdev_size 6
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#define c_mtime_offset 48
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#define c_mtime_size 11
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#define c_namesize_offset 59
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#define c_namesize_size 6
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#define c_filesize_offset 65
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#define c_filesize_size 11
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/*
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* Set output format to 'cpio' format.
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*/
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int
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archive_write_set_format_cpio(struct archive *_a)
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{
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struct archive_write *a = (struct archive_write *)_a;
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struct cpio *cpio;
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archive_check_magic(_a, ARCHIVE_WRITE_MAGIC,
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ARCHIVE_STATE_NEW, "archive_write_set_format_cpio");
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/* If someone else was already registered, unregister them. */
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if (a->format_free != NULL)
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(a->format_free)(a);
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cpio = (struct cpio *)calloc(1, sizeof(*cpio));
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if (cpio == NULL) {
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archive_set_error(&a->archive, ENOMEM, "Can't allocate cpio data");
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return (ARCHIVE_FATAL);
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}
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a->format_data = cpio;
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a->format_name = "cpio";
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a->format_options = archive_write_cpio_options;
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a->format_write_header = archive_write_cpio_header;
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a->format_write_data = archive_write_cpio_data;
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a->format_finish_entry = archive_write_cpio_finish_entry;
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a->format_close = archive_write_cpio_close;
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a->format_free = archive_write_cpio_free;
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a->archive.archive_format = ARCHIVE_FORMAT_CPIO_POSIX;
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a->archive.archive_format_name = "POSIX cpio";
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return (ARCHIVE_OK);
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}
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static int
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archive_write_cpio_options(struct archive_write *a, const char *key,
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const char *val)
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{
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struct cpio *cpio = (struct cpio *)a->format_data;
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int ret = ARCHIVE_FAILED;
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if (strcmp(key, "hdrcharset") == 0) {
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if (val == NULL || val[0] == 0)
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archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
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"%s: hdrcharset option needs a character-set name",
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a->format_name);
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else {
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cpio->opt_sconv = archive_string_conversion_to_charset(
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&a->archive, val, 0);
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if (cpio->opt_sconv != NULL)
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ret = ARCHIVE_OK;
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else
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ret = ARCHIVE_FATAL;
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}
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return (ret);
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}
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/* Note: The "warn" return is just to inform the options
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* supervisor that we didn't handle it. It will generate
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* a suitable error if no one used this option. */
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return (ARCHIVE_WARN);
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}
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/*
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* Ino values are as long as 64 bits on some systems; cpio format
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* only allows 18 bits and relies on the ino values to identify hardlinked
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* files. So, we can't merely "hash" the ino numbers since collisions
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* would corrupt the archive. Instead, we generate synthetic ino values
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* to store in the archive and maintain a map of original ino values to
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* synthetic ones so we can preserve hardlink information.
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*
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* TODO: Make this more efficient. It's not as bad as it looks (most
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* files don't have any hardlinks and we don't do any work here for those),
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* but it wouldn't be hard to do better.
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*
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* TODO: Work with dev/ino pairs here instead of just ino values.
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*/
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static int
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synthesize_ino_value(struct cpio *cpio, struct archive_entry *entry)
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{
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int64_t ino = archive_entry_ino64(entry);
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int ino_new;
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size_t i;
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/*
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* If no index number was given, don't assign one. In
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* particular, this handles the end-of-archive marker
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* correctly by giving it a zero index value. (This is also
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* why we start our synthetic index numbers with one below.)
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*/
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if (ino == 0)
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return (0);
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/* Don't store a mapping if we don't need to. */
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if (archive_entry_nlink(entry) < 2) {
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return (int)(++cpio->ino_next);
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}
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/* Look up old ino; if we have it, this is a hardlink
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* and we reuse the same value. */
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for (i = 0; i < cpio->ino_list_next; ++i) {
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if (cpio->ino_list[i].old == ino)
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return (cpio->ino_list[i].new);
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}
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/* Assign a new index number. */
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ino_new = (int)(++cpio->ino_next);
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/* Ensure space for the new mapping. */
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if (cpio->ino_list_size <= cpio->ino_list_next) {
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size_t newsize = cpio->ino_list_size < 512
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? 512 : cpio->ino_list_size * 2;
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void *newlist = realloc(cpio->ino_list,
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sizeof(cpio->ino_list[0]) * newsize);
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if (newlist == NULL)
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return (-1);
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cpio->ino_list_size = newsize;
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cpio->ino_list = newlist;
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}
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/* Record and return the new value. */
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cpio->ino_list[cpio->ino_list_next].old = ino;
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cpio->ino_list[cpio->ino_list_next].new = ino_new;
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++cpio->ino_list_next;
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return (ino_new);
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}
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static struct archive_string_conv *
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get_sconv(struct archive_write *a)
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{
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struct cpio *cpio;
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struct archive_string_conv *sconv;
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cpio = (struct cpio *)a->format_data;
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sconv = cpio->opt_sconv;
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if (sconv == NULL) {
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if (!cpio->init_default_conversion) {
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cpio->sconv_default =
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archive_string_default_conversion_for_write(
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&(a->archive));
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cpio->init_default_conversion = 1;
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}
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sconv = cpio->sconv_default;
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}
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return (sconv);
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}
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static int
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archive_write_cpio_header(struct archive_write *a, struct archive_entry *entry)
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{
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const char *path;
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size_t len;
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if (archive_entry_filetype(entry) == 0) {
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archive_set_error(&a->archive, -1, "Filetype required");
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return (ARCHIVE_FAILED);
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}
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if (archive_entry_pathname_l(entry, &path, &len, get_sconv(a)) != 0
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&& errno == ENOMEM) {
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archive_set_error(&a->archive, ENOMEM,
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"Can't allocate memory for Pathname");
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return (ARCHIVE_FATAL);
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}
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if (len == 0 || path == NULL || path[0] == '\0') {
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archive_set_error(&a->archive, -1, "Pathname required");
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return (ARCHIVE_FAILED);
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}
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if (!archive_entry_size_is_set(entry) || archive_entry_size(entry) < 0) {
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archive_set_error(&a->archive, -1, "Size required");
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return (ARCHIVE_FAILED);
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}
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return write_header(a, entry);
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}
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static int
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write_header(struct archive_write *a, struct archive_entry *entry)
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{
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struct cpio *cpio;
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const char *p, *path;
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int pathlength, ret, ret_final;
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int64_t ino;
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char h[76];
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struct archive_string_conv *sconv;
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struct archive_entry *entry_main;
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size_t len;
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cpio = (struct cpio *)a->format_data;
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ret_final = ARCHIVE_OK;
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sconv = get_sconv(a);
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#if defined(_WIN32) && !defined(__CYGWIN__)
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/* Make sure the path separators in pahtname, hardlink and symlink
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* are all slash '/', not the Windows path separator '\'. */
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entry_main = __la_win_entry_in_posix_pathseparator(entry);
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if (entry_main == NULL) {
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archive_set_error(&a->archive, ENOMEM,
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"Can't allocate ustar data");
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return(ARCHIVE_FATAL);
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}
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if (entry != entry_main)
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entry = entry_main;
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else
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entry_main = NULL;
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#else
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entry_main = NULL;
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#endif
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ret = archive_entry_pathname_l(entry, &path, &len, sconv);
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if (ret != 0) {
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if (errno == ENOMEM) {
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archive_set_error(&a->archive, ENOMEM,
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"Can't allocate memory for Pathname");
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ret_final = ARCHIVE_FATAL;
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goto exit_write_header;
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}
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archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
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"Can't translate pathname '%s' to %s",
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archive_entry_pathname(entry),
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archive_string_conversion_charset_name(sconv));
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ret_final = ARCHIVE_WARN;
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}
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/* Include trailing null. */
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pathlength = (int)len + 1;
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memset(h, 0, sizeof(h));
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format_octal(070707, h + c_magic_offset, c_magic_size);
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format_octal(archive_entry_dev(entry), h + c_dev_offset, c_dev_size);
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ino = synthesize_ino_value(cpio, entry);
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if (ino < 0) {
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archive_set_error(&a->archive, ENOMEM,
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"No memory for ino translation table");
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ret_final = ARCHIVE_FATAL;
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goto exit_write_header;
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} else if (ino > 0777777) {
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archive_set_error(&a->archive, ERANGE,
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"Too many files for this cpio format");
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ret_final = ARCHIVE_FATAL;
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goto exit_write_header;
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}
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format_octal(ino & 0777777, h + c_ino_offset, c_ino_size);
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/* TODO: Set ret_final to ARCHIVE_WARN if any of these overflow. */
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format_octal(archive_entry_mode(entry), h + c_mode_offset, c_mode_size);
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format_octal(archive_entry_uid(entry), h + c_uid_offset, c_uid_size);
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format_octal(archive_entry_gid(entry), h + c_gid_offset, c_gid_size);
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format_octal(archive_entry_nlink(entry), h + c_nlink_offset, c_nlink_size);
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if (archive_entry_filetype(entry) == AE_IFBLK
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|| archive_entry_filetype(entry) == AE_IFCHR)
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format_octal(archive_entry_dev(entry), h + c_rdev_offset, c_rdev_size);
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else
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format_octal(0, h + c_rdev_offset, c_rdev_size);
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format_octal(archive_entry_mtime(entry), h + c_mtime_offset, c_mtime_size);
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format_octal(pathlength, h + c_namesize_offset, c_namesize_size);
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/* Non-regular files don't store bodies. */
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if (archive_entry_filetype(entry) != AE_IFREG)
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archive_entry_set_size(entry, 0);
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/* Symlinks get the link written as the body of the entry. */
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ret = archive_entry_symlink_l(entry, &p, &len, sconv);
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if (ret != 0) {
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if (errno == ENOMEM) {
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archive_set_error(&a->archive, ENOMEM,
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"Can't allocate memory for Linkname");
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ret_final = ARCHIVE_FATAL;
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goto exit_write_header;
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}
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archive_set_error(&a->archive, ARCHIVE_ERRNO_FILE_FORMAT,
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"Can't translate linkname '%s' to %s",
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archive_entry_symlink(entry),
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archive_string_conversion_charset_name(sconv));
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ret_final = ARCHIVE_WARN;
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}
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if (len > 0 && p != NULL && *p != '\0')
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ret = format_octal(strlen(p), h + c_filesize_offset,
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c_filesize_size);
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else
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ret = format_octal(archive_entry_size(entry),
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h + c_filesize_offset, c_filesize_size);
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if (ret) {
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archive_set_error(&a->archive, ERANGE,
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"File is too large for cpio format.");
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ret_final = ARCHIVE_FAILED;
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goto exit_write_header;
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}
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ret = __archive_write_output(a, h, sizeof(h));
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if (ret != ARCHIVE_OK) {
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ret_final = ARCHIVE_FATAL;
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goto exit_write_header;
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}
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ret = __archive_write_output(a, path, pathlength);
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if (ret != ARCHIVE_OK) {
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ret_final = ARCHIVE_FATAL;
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goto exit_write_header;
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}
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cpio->entry_bytes_remaining = archive_entry_size(entry);
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/* Write the symlink now. */
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if (p != NULL && *p != '\0') {
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ret = __archive_write_output(a, p, strlen(p));
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if (ret != ARCHIVE_OK) {
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ret_final = ARCHIVE_FATAL;
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goto exit_write_header;
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}
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}
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exit_write_header:
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if (entry_main)
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archive_entry_free(entry_main);
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return (ret_final);
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}
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static ssize_t
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archive_write_cpio_data(struct archive_write *a, const void *buff, size_t s)
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{
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struct cpio *cpio;
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int ret;
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cpio = (struct cpio *)a->format_data;
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if (s > cpio->entry_bytes_remaining)
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s = (size_t)cpio->entry_bytes_remaining;
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ret = __archive_write_output(a, buff, s);
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cpio->entry_bytes_remaining -= s;
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if (ret >= 0)
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return (s);
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else
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return (ret);
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}
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/*
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* Format a number into the specified field.
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*/
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static int
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format_octal(int64_t v, void *p, int digits)
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{
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int64_t max;
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int ret;
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max = (((int64_t)1) << (digits * 3)) - 1;
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if (v >= 0 && v <= max) {
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format_octal_recursive(v, (char *)p, digits);
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ret = 0;
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} else {
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format_octal_recursive(max, (char *)p, digits);
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ret = -1;
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}
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return (ret);
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}
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static int64_t
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format_octal_recursive(int64_t v, char *p, int s)
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{
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if (s == 0)
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return (v);
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v = format_octal_recursive(v, p+1, s-1);
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*p = '0' + ((char)v & 7);
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return (v >> 3);
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}
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static int
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archive_write_cpio_close(struct archive_write *a)
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{
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int er;
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struct archive_entry *trailer;
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trailer = archive_entry_new2(NULL);
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/* nlink = 1 here for GNU cpio compat. */
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archive_entry_set_nlink(trailer, 1);
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archive_entry_set_size(trailer, 0);
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archive_entry_set_pathname(trailer, "TRAILER!!!");
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er = write_header(a, trailer);
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archive_entry_free(trailer);
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return (er);
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}
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static int
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archive_write_cpio_free(struct archive_write *a)
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{
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|
struct cpio *cpio;
|
|
|
|
cpio = (struct cpio *)a->format_data;
|
|
free(cpio->ino_list);
|
|
free(cpio);
|
|
a->format_data = NULL;
|
|
return (ARCHIVE_OK);
|
|
}
|
|
|
|
static int
|
|
archive_write_cpio_finish_entry(struct archive_write *a)
|
|
{
|
|
struct cpio *cpio;
|
|
|
|
cpio = (struct cpio *)a->format_data;
|
|
return (__archive_write_nulls(a,
|
|
(size_t)cpio->entry_bytes_remaining));
|
|
}
|