posix_devctl()

Control a device

Synopsis:

#include <sys/types.h>
#include <unistd.h>
#include <devctl.h>

int posix_devctl( int filedes,
                  int dcmd,
                  void * dev_data_ptr,
                  size_t n_bytes,
                  int * dev_info_ptr );

Arguments:

See devctl().

Library:

libc

Use the -l c option to qcc to link against this library. This library is usually included automatically.

Description:

The posix_devctl() function sends the device-specific command dcmd to the process managing the device opened as filedes. We've defined posix_devctl() to be an alias for devctl().

Returns:

See devctl().

Classification:

POSIX Part 26: Device Control Application Program Interface

Safety:
Cancellation point	Yes
Interrupt handler	No
Signal handler	Yes
Thread	Yes