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Annotation of 40BSD/sys/h/file.h, revision 1.1

1.1     ! root        1: /*     file.h  4.1     11/9/80 */
        !             2: 
        !             3: /*
        !             4:  * One file structure is allocated
        !             5:  * for each open/creat/pipe call.
        !             6:  * Main use is to hold the read/write
        !             7:  * pointer associated with each open
        !             8:  * file.
        !             9:  */
        !            10: struct file
        !            11: {
        !            12:        short   f_flag;
        !            13:        short   f_count;                /* reference count */
        !            14:        struct inode *f_inode;          /* pointer to inode structure */
        !            15:        union {
        !            16:                off_t   f_offset;       /* read/write character pointer */
        !            17:                struct chan *f_chan;    /* mpx channel pointer */
        !            18:        } f_un;
        !            19: };
        !            20: 
        !            21: #ifdef KERNEL
        !            22: extern struct file file[];             /* the file table itself */
        !            23: 
        !            24: struct file *getf();
        !            25: struct file *falloc();
        !            26: #endif
        !            27: 
        !            28: /* flags */
        !            29: #define        FREAD   01
        !            30: #define        FWRITE  02
        !            31: #define        FPIPE   04
        !            32: #define        FMPX    010
        !            33: #define        FMPY    020
        !            34: #define        FMP     030

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