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/* ----------------------------------------------------------------------- *
*
* Copyright 2007-2008 H. Peter Anvin - All Rights Reserved
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use,
* copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom
* the Software is furnished to do so, subject to the following
* conditions:
*
* The above copyright notice and this permission notice shall
* be included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* ----------------------------------------------------------------------- */
/*
* initramfs.c
*
* Utility functions for initramfs manipulation
*/
#include <stdlib.h>
#include <syslinux/linux.h>
struct initramfs *initramfs_init(void)
{
struct initramfs *ir;
ir = calloc(sizeof(*ir), 1);
if (!ir)
return NULL;
ir->prev = ir->next = ir;
return ir;
}
int initramfs_add_data(struct initramfs *ihead, const void *data,
size_t data_len, size_t len, size_t align)
{
struct initramfs *in;
if (!len)
return 0; /* Nothing to add... */
/* Alignment must be a power of 2, and <= INITRAMFS_MAX_ALIGN */
if (!align || (align & (align - 1)) || align > INITRAMFS_MAX_ALIGN)
return -1;
in = malloc(sizeof(*in));
if (!in)
return -1;
in->len = len;
in->data = data;
in->data_len = data_len;
in->align = align;
in->next = ihead;
in->prev = ihead->prev;
ihead->prev->next = in;
ihead->prev = in;
return 0;
}
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