SIOC_TEST_UNIT_READY

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This IOCTL command issues the SCSI Test Unit Ready command to the device.

There are no arguments for this IOCTL command.

An example of the SIOC_TEST_UNIT_READY command is
#include <sys/IBM_tape.h>
if (!ioctl (fd, SIOC_TEST_UNIT_READY, NULL)) {
   printf ("The SIOC_TEST_UNIT_READY ioctl succeeded\n");
}
else {
   perror ("The SIOC_TEST_UNIT_READY ioctl failed");
   sioc_request_sense();
}