DCMD_PTPD_GET_TIME

QNX SDP8.0Devctl and Ioctl CommandsDeveloper

Get the current time

Synopsis:

#include <dcmd_ptpd.h>

#define DCMD_PTPD_GET_TIME   __DIOF(_DCMD_NET, 15, MyTimeInternal )

Arguments to devctl():

Argument Value
filedes A file descriptor that you obtained by opening /dev/ptpd
dcmd DCMD_PTPD_GET_TIME
dev_data_ptr A pointer to a MyTimeInternal
n_bytes sizeof(MyTimeInternal)
dev_info_ptr NULL

Description:

This command gets the current time that's maintained by the Precision Time Protocol.

Note:
To use this command, you must specify the -K option when you start ptpd2.

Input:

None.

Output:

A filled-in MyTimeInternal structure, which is defined in <dcmd_ptpd.h> as follows: 

typedef struct {
        uint32_t seconds;
        uint32_t nanoseconds;
} MyTimeInternal;

Example:

MyTimeInternal curr_time;

if(devctl(fd, DCMD_PTPD_GET_TIME, &curr_time, sizeof(curr_time), NULL) != EOK)
{
   /* Error */
}

See also:

DCMD_PTPD_DELAYMS, DCMD_PTPD_DELAYSM, DCMD_PTPD_GET_PDELAY_INTERVAL, DCMD_PTPD_GET_TAI_UTC_OFFSET, DCMD_PTPD_INFO, DCMD_PTPD_SEND_SIGNALING_MSG, DCMD_PTPD_SET_PDELAY_INTERVAL, DCMD_PTPD_STATUS

devctl() in the QNX OS C Library Reference

ptpd2 in the Utilities Reference

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