SVR5

do_ioctl(D3)

do_ioctl -- invoke another driver's ioctl(D2) entry point routine

Synopsis

   #include <sys/types.h>
   #include <sys/ddi.h>
   
   int do_ioctl(chan_handle_t chan_handle, int cmd, void *arg, int mode,
       cred_t *crp, int *rvalp);

Description

do_ioctl( ) calls another driver's ioctl(D2) entry point routine. This driver must first obtain a channel handle with the drv_open(D3) function. The "other driver" may actually be the same driver.

Arguments

chan_handle: Channel handle returned by the drv_open(D3) function in the other driver.
cmd: cmd argument to be passed to the other driver's ioctl(D2) routine
arg: arg argument to be passed to the other driver's ioctl(D2) routine
mode: mode argument to be passed to the other driver's ioctl(D2) routine
crp: crp argument to be passed to the other driver's ioctl(D2) routine
rvalp: rvalp argument to be passed to the other driver's ioctl(D2) routine

Return values

Returns 0 on success, or the appropriate errno value on failure. The corresponding ioctl system call will usually return 0 on success or -1 on failure, although this value can be changed by the setting of the rvalp argument.

Usage

Context and synchronization

User context.

Hardware applicability

All

Version applicability

ddi: 8, 8mp

References

drv_attach(D3), drv_detach(D3), drv_open(D3), ioctl(D2)

``Layered device drivers'' in HDK Technical Reference