TCFLSH
QNX SDP8.0Devctl and Ioctl CommandsDeveloper
Flush buffers
Synopsis:
#include <sys/ioctl.h>
#define TCFLSH _IOW('T', 7, int)
Arguments to ioctl():
Argument | Value |
---|---|
fd | A file descriptor that you obtained by opening the device |
request | TCFLSH |
Additional argument | A pointer to an integer |
Description:
This command flushes the input and/or output stream associated with the file descriptor.
Note:
This command is for internal use, and you shouldn't use it directly.
Instead use the
tcflush()
cover function.
Input:
The queue selector; one of:
- 0 — discard all data that's received, but not yet read, on the device associated with filedes.
- 1 — discard all data that's written, but not yet transmitted, on the device associated with filedes.
- 2 — discard all data that's written, but not yet transmitted, as well as all data that's received, but not yet read, on the device associated with filedes.
Output:
None.
See also:
ioctl() in the QNX OS C Library Reference
Page updated: