CAN_DEVCTL_GET_PRIO

QNX SDP8.0Devctl and Ioctl CommandsDeveloper

Get the priority for transmitted messages

Synopsis:

#include <sys/can_dcmd.h>

#define CAN_DEVCTL_GET_PRIO   __DIOF(_DCMD_MISC, CAN_CMD_CODE + 4, uint32_t)

Arguments to devctl():

Argument Value
filedes A file descriptor that you obtained by opening the device. This must be for a transmit mailbox (e.g., /dev/can1/tx3).
dcmd CAN_DEVCTL_GET_PRIO
dev_data_ptr A pointer to a uint32_t
n_bytes sizeof(uint32_t)
dev_info_ptr NULL

Description:

This command gets the priority of messages for a transmit mailbox.

Input:

None.

Output:

The priority.

Example:

int      ret;
uint32_t val;

if( (fd = open( "/dev/can1/tx3", O_RDWR)) == -1 )
{
    printf("open of %s failed \n", devname);
    exit(EXIT_FAILURE);
}

if(EOK != (ret = devctl(fd, CAN_DEVCTL_GET_PRIO, &val, sizeof(val), NULL)))
{
    fprintf(stderr, "devctl CAN_DEVCTL_GET_PRIO: %s\n", strerror(ret));
} else {
    printf("GET_PRIO = %u\n", val);
}

See also:

CAN_DEVCTL_SET_PRIO

devctl() in the QNX OS C Library Reference

canctl in the Utilities Reference

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