CODEWITHSUNDEEP
clinuxsignalsdrivecd
mayrthom
mayrthom

Reputation: 21

signal when cd is inserted in C

Is there a way to detect if a CD is inserted in C on Linux?

I tried it with an SIGIO Signal:

fd = open("/dev/cdrom", O_RDWR | O_NONBLOCK );
struct sigaction saio;  

saio.sa_handler = signal_handler_IO;
saio.sa_flags = 0;
saio.sa_restorer = NULL; 
sigaction(SIGIO,&saio,NULL);

fcntl(fd, F_SETFL, FNDELAY);
fcntl(fd, F_SETOWN, getpid());
fcntl(fd, F_SETFL,  O_ASYNC );

But the function "signal_handler_IO" is never called.

Is there a possibility doing it this way?

Upvotes: 2

Views: 100

Answers (1)

dreais
dreais

Reputation: 75

did you try to use poll() or any similar functions? (epoll/epoll_wait/select/...)

https://man7.org/linux/man-pages/man2/poll.2.html

Upvotes: 1

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