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UnixArchive
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PDP-11
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V6
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usr
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conf.h
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C/C++ Source or Header
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1975-05-14
|
916b
|
56 lines
/*
* Used to dissect integer device code
* into major (driver designation) and
* minor (driver parameter) parts.
*/
struct
{
char d_minor;
char d_major;
};
/*
* Declaration of block device
* switch. Each entry (row) is
* the only link between the
* main unix code and the driver.
* The initialization of the
* device switches is in the
* file conf.c.
*/
struct bdevsw
{
int (*d_open)();
int (*d_close)();
int (*d_strategy)();
int *d_tab;
} bdevsw[];
/*
* Nblkdev is the number of entries
* (rows) in the block switch. It is
* set in binit/bio.c by making
* a pass over the switch.
* Used in bounds checking on major
* device numbers.
*/
int nblkdev;
/*
* Character device switch.
*/
struct cdevsw
{
int (*d_open)();
int (*d_close)();
int (*d_read)();
int (*d_write)();
int (*d_sgtty)();
} cdevsw[];
/*
* Number of character switch entries.
* Set by cinit/tty.c
*/
int nchrdev;