====== trayopen (archives) ======
I wrote a similar program in C that does the same thing, but with more states. See [[dvd_drive_status]].
==== Archives ====
This code has been a lifesaver to me when it comes to checking to see if a tray is open or not. Believe it or not, there's nothing good out there to query it! (And I've looked, too.)
Enter **trayopen**, a small piece of C code that was posted [[http://www.linuxquestions.org/questions/slackware-14/detect-cd-tray-status-4175450610/|on the linux questions forums]] by volkerdi. (thanks!)
Here's the complete code:
#include
#include
#include
#include
#include
int main(int argc,char **argv) {
int cdrom;
int status=1;
if(argc == 0) {
printf("Usage: trayopen [device]\n");
printf("Result: Open tray exit code 0, closed tray exit code 1.\n");
}
if ((cdrom = open(argv[1],O_RDONLY | O_NONBLOCK)) < 0) {
printf("Unable to open device %s. Provide a device name (/dev/sr0, /dev/cdrom) as a parameter.\n",argv[1]);
exit(1);
}
if (ioctl(cdrom,CDROM_DRIVE_STATUS) == CDS_TRAY_OPEN) {
status=0;
}
close(cdrom);
exit(status);
}
Just download the code, and compile it with gcc:
gcc trayopen.c -o trayopen
Then, running it, it will return a 0 if it's open, or a 1 if it's closed.
Here's a sample bash script to call it:
#!/bin/bash
trayopen /dev/dvd
if [[ $? -eq 0 ]]; then
echo "Open for business!"
elif [[ $? -eq 1 ]]; then
echo "Sorry, already occupied."
fi