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54 lines
1.2 KiB
C
54 lines
1.2 KiB
C
/**
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* @file initrd.h
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* Initrd image support
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* An archive file (made with ar) can be linked into the final executable to
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* allow files to be loaded in memory on boot. See mkinitrd.sh or the Makefile
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* for more info.
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*/
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#ifndef INITRD_H_
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#define INITRD_H_
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#include <stdint.h>
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/**
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* Structure for the archive's header.
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*/
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typedef struct
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{
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char signature[8]; /**< The archive's signature. */
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} __attribute__ ((packed)) initrd_header;
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/**
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* Structure for a file entry in the archive.
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*/
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typedef struct
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{
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char name[16]; /**< The name of the file. */
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uint8_t unused[32]; /**< Unused information. */
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char size[10]; /**< The file's size in bytes (as string). */
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char sig[2]; /**< A signature to start file data. */
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} __attribute__ ((packed)) initrd_file;
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/**
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* Confirms the initrd image is loaded and valid.
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* @return non-zero if valid image found
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*/
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uint8_t initrd_validate(void);
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/**
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* Gets contents of the given file.
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* @param name the file's name
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* @return pointer to file data, null if not found
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*/
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char *initrd_getfile(const char *name);
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/**
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* Gets the size of the given file.
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* @param name the file's name
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* @return the file's size, in bytes
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*/
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uint32_t initrd_getfilesize(const char *name);
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#endif // INITRD_H_
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