TIOCDRAIN

Wait until output has drained

Synopsis:

#include <sys/ioctl.h>

#define TIOCDRAIN       _IO('t',  94)

Argument	Value
`fd`	A file descriptor that you obtained by opening the device
`request`	TIOCDRAIN

It's also implemented as the DCMD_CHR_TCDRAIN devctl() command.

Note: This command is for internal use, and you shouldn't use it directly. Instead use the tcdrain() cover function.

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