openadk/package/heirloom-cpio/src/ib_open.c

/*
 * Copyright (c) 2003 Gunnar Ritter
 *
 * This software is provided 'as-is', without any express or implied
 * warranty. In no event will the authors be held liable for any damages
 * arising from the use of this software.
 *
 * Permission is granted to anyone to use this software for any purpose,
 * including commercial applications, and to alter it and redistribute
 * it freely, subject to the following restrictions:
 *
 * 1. The origin of this software must not be misrepresented; you must not
 *    claim that you wrote the original software. If you use this software
 *    in a product, an acknowledgment in the product documentation would be
 *    appreciated but is not required.
 *
 * 2. Altered source versions must be plainly marked as such, and must not be
 *    misrepresented as being the original software.
 *
 * 3. This notice may not be removed or altered from any source distribution.
 */
/*	Sccsid @(#)ib_open.c	1.2 (gritter) 4/17/03	*/

#include	<sys/types.h>
#include	<sys/stat.h>
#include	<fcntl.h>
#include	<unistd.h>
#include	<string.h>
#include	<errno.h>
#include	<stdlib.h>

#include	"iblok.h"

struct iblok *
ib_open(const char *name, unsigned blksize)
{
	struct iblok	*ip;
	int	fd, err;

	if ((fd = open(name, O_RDONLY)) < 0)
		return NULL;
	if ((ip = ib_alloc(fd, blksize)) == NULL) {
		err = errno;
		close(fd);
		errno = err;
	}
	return ip;
}