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Annotation of 41BSD/sys/h/file.h, revision 1.1.1.1

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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