the eject command simple won't work if there is no disk in the drive
the call to get the file descriptor will fail
you can get some info using
int test = (ioctl(fdcdrom, CDROM_DRIVE_STATUS));
but it doesn't do any good unless you want to close it if it's open or something
no matter how you implement it or in what language it won't open with no disk in it so you are covered
Code:
#include <fcntl.h>
#include <linux/cdrom.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
int main () {
int fd;
if ((fd = open("dev/cdrom",O_RDONLY ))==-1)
return 0;
ioctl (fd, CDROMEJECT);
close (fd);
return 0;
}
