ghcup-hs/3rdparty/libarchive/c/archive_entry_xattr.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: head/lib/libarchive/archive_entry_xattr.c 201096 2009-12-28 02:41:27Z kientzle $");

#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_LIMITS_H
#include <limits.h>
#endif
#ifdef HAVE_LINUX_FS_H
#include <linux/fs.h>	/* for Linux file flags */
#endif
/*
 * Some Linux distributions have both linux/ext2_fs.h and ext2fs/ext2_fs.h.
 * As the include guards don't agree, the order of include is important.
 */
#ifdef HAVE_LINUX_EXT2_FS_H
#include <linux/ext2_fs.h>	/* for Linux file flags */
#endif
#if defined(HAVE_EXT2FS_EXT2_FS_H) && !defined(__CYGWIN__)
#include <ext2fs/ext2_fs.h>	/* for Linux file flags */
#endif
#include <stddef.h>
#include <stdio.h>
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#ifdef HAVE_WCHAR_H
#include <wchar.h>
#endif

#include "archive.h"
#include "archive_entry.h"
#include "archive_private.h"
#include "archive_entry_private.h"

/*
 * extended attribute handling
 */

void
archive_entry_xattr_clear(struct archive_entry *entry)
{
	struct ae_xattr	*xp;

	while (entry->xattr_head != NULL) {
		xp = entry->xattr_head->next;
		free(entry->xattr_head->name);
		free(entry->xattr_head->value);
		free(entry->xattr_head);
		entry->xattr_head = xp;
	}

	entry->xattr_head = NULL;
}

void
archive_entry_xattr_add_entry(struct archive_entry *entry,
	const char *name, const void *value, size_t size)
{
	struct ae_xattr	*xp;

	if ((xp = (struct ae_xattr *)malloc(sizeof(struct ae_xattr))) == NULL)
		__archive_errx(1, "Out of memory");

	if ((xp->name = strdup(name)) == NULL)
		__archive_errx(1, "Out of memory");

	if ((xp->value = malloc(size)) != NULL) {
		memcpy(xp->value, value, size);
		xp->size = size;
	} else
		xp->size = 0;

	xp->next = entry->xattr_head;
	entry->xattr_head = xp;
}


/*
 * returns number of the extended attribute entries
 */
int
archive_entry_xattr_count(struct archive_entry *entry)
{
	struct ae_xattr *xp;
	int count = 0;

	for (xp = entry->xattr_head; xp != NULL; xp = xp->next)
		count++;

	return count;
}

int
archive_entry_xattr_reset(struct archive_entry * entry)
{
	entry->xattr_p = entry->xattr_head;

	return archive_entry_xattr_count(entry);
}

int
archive_entry_xattr_next(struct archive_entry * entry,
	const char **name, const void **value, size_t *size)
{
	if (entry->xattr_p) {
		*name = entry->xattr_p->name;
		*value = entry->xattr_p->value;
		*size = entry->xattr_p->size;

		entry->xattr_p = entry->xattr_p->next;

		return (ARCHIVE_OK);
	} else {
		*name = NULL;
		*value = NULL;
		*size = (size_t)0;
		return (ARCHIVE_WARN);
	}
}

/*
 * end of xattr handling
 */