98 lines
2.2 KiB
C
98 lines
2.2 KiB
C
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/*
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* Copyright (c) 2007 Vreixo Formoso
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*
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* This file is part of the libisofs project; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation. See COPYING file for details.
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*/
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#ifndef LIBISO_FSOURCE_H_
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#define LIBISO_FSOURCE_H_
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/*
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* Definitions for the file sources.
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*/
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/*
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* Some functions here will be moved to libisofs.h when we expose
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* Sources.
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*/
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#include <sys/stat.h>
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typedef struct Iso_File_Source IsoFileSource;
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typedef struct Iso_Filesystem IsoFilesystem;
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struct Iso_Filesystem
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{
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/**
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*
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* @return
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* 1 on success, < 0 on error
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*/
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int (*get_root)(IsoFilesystem *fs, IsoFileSource *root);
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};
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struct Iso_File_Source
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{
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/**
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*
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* @return
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* 1 success, < 0 error
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*/
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int (*lstat)(IsoFileSource *src, struct stat *info);
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//stat?
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/**
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* Opens the source.
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* @return 1 on success, < 0 on error
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*/
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int (*open)(IsoFileSource *src);
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void (*close)(IsoFileSource *src);
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/**
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* Attempts to read up to count bytes from the given source into
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* the buffer starting at buf.
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*
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* The file src must be open() before calling this, and close() when no
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* more needed. Not valid for dirs. On symlinks it reads the destination
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* file.
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*
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* @return
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* number of bytes read, 0 if EOF, < 0 on error
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*/
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int (*read)(IsoFileSource *src, void *buf, size_t count);
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/**
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* Read a directory.
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*
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* Each call to this function will return a new children, until we reach
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* the end of file (i.e, no more children), in that case it returns 0.
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*
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* The dir must be open() before calling this, and close() when no more
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* needed. Only valid for dirs.
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*
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* @param child
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* pointer to be filled with the given child. Undefined on error or OEF
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* @return
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* 1 on success, 0 if EOF (no more children), < 0 on error
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*/
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int (*readdir)(IsoFileSource *src, IsoFileSource **child);
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/**
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*
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*/
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int (*readlink)(IsoFileSource *src, char *buf, size_t bufsiz);
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};
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#endif /*LIBISO_FSOURCE_H_*/
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