DCMD_MISC_MQGETATTR
QNX SDP8.0Devctl and Ioctl CommandsDeveloper
Get the attributes of a message queue
Synopsis:
#include <sys/dcmd_misc.h>
#define DCMD_MISC_MQGETATTR __DIOF(_DCMD_MISC, 1, struct mq_attr)
Arguments to devctl():
Argument | Value |
---|---|
filedes | A message-queue descriptor (of type mqd_t) that you obtained by opening the queue. |
dcmd | DCMD_MISC_MQGETATTR |
dev_data_ptr | A pointer to a struct mq_attr |
n_bytes | sizeof(struct mq_attr) |
dev_info_ptr | NULL |
Description:
This command gets the attributes for a message queue. For more information, see mq_gettattr() in the QNX OS C Library Reference
Input:
None.
Output:
The attributes of the message queue.
See also:
devctl(), mq_gettattr() in the QNX OS C Library Reference
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