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