[isg@interrupt:workspace/C]$ cc -Wall checkcdstatus.c -o checkcdstatus
[isg@interrupt:workspace/C]$ ./checkcdstatus
Status: Tray is open
[isg@interrupt:workspace/C]$ ./checkcdstatus
Status: Disc OK!
[isg@interrupt:workspace/C]$ cat -n checkcdstatus.c
1 #include <linux/cdrom.h>
2 #include <stdio.h>
3 #include <sys/types.h>
4 #include <sys/stat.h>
5 #include <sys/ioctl.h>
6 #include <fcntl.h>
7 #include <errno.h>
8
9 // from <linux/cdrom.h>
10 //#define CDS_NO_INFO 0
11 //#define CDS_NO_DISC 1
12 //#define CDS_TRAY_OPEN 2
13 //#define CDS_DRIVE_NOT_READY 3
14 //#define CDS_DISC_OK 4
15
16 //return drive status
17 char*
18 status(int r)
19 {
20 switch(r)
21 {
22 case 0:
23 return "Not implemented";
24 case 1:
25 return "No disc loaded";
26 case 2:
27 return "Tray is open";
28 case 3:
29 return "Drive not ready";
30 case 4:
31 return "Disc OK!";
32 default:
33 return "Houston we have a problem here";
34 }
35
36 }
37
38
39 int
40 main()
41 {
42 int fd = open("/dev/scd0", O_RDWR|O_EXCL|O_NONBLOCK);
43 int res = ioctl(fd, CDROM_DRIVE_STATUS,0);
44 printf("Status: %s\n", status(res));
45 if (errno)
46 perror("Error occured");
47
48 return 0;
49
50 }
Enjoy!
]]>A friend asked me as he is interested in Mono and he wants to work on some project at university.
]]>