DCMD_CHR_ISSIZE

Determine the size of the device's input buffer

Synopsis:

#include <sys/dcmd_chr.h>

#define DCMD_CHR_ISSIZE    __DIOF(_DCMD_CHR, 27, unsigned)

Arguments to devctl():

Argument Value
filedes A file descriptor that you obtained by opening the device.
dcmd DCMD_CHR_ISSIZE
dev_data_ptr A pointer to an unsigned
n_bytes sizeof(unsigned)
dev_info_ptr NULL

Description:

This command determines the size of the device's input buffer.

Input:

None.

Output:

The size of the device's input buffer.

See also:

DCMD_CHR_OSSIZE

devctl() in the QNX Neutrino C Library Reference