38 lines
978 B
C
38 lines
978 B
C
#ifndef __FILE_H
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#define __FILE_H
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struct file {
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enum { FD_NONE, FD_PIPE, FD_ENTRY, FD_DEVICE } type;
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int ref; // reference count
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char readable;
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char writable;
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struct pipe *pipe; // FD_PIPE
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struct dirent *ep;
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uint off; // FD_ENTRY
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short major; // FD_DEVICE
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};
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// #define major(dev) ((dev) >> 16 & 0xFFFF)
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// #define minor(dev) ((dev) & 0xFFFF)
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// #define mkdev(m,n) ((uint)((m)<<16| (n)))
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// map major device number to device functions.
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struct devsw {
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int (*read)(int, uint64, int);
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int (*write)(int, uint64, int);
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};
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extern struct devsw devsw[];
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#define CONSOLE 1
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struct file* filealloc(void);
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void fileclose(struct file*);
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struct file* filedup(struct file*);
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void fileinit(void);
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int fileread(struct file*, uint64, int n);
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int filestat(struct file*, uint64 addr);
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int filewrite(struct file*, uint64, int n);
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int dirnext(struct file *f, uint64 addr);
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#endif |