|
| From: | Burkhard Plaum |
| Subject: | Re: [Libcdio-devel] open(x, O_RDONLY|O_NONBLOCK) vs. O_RDONLY) on FreeBSD (Solaris, GNU/Linux)? |
| Date: | Mon, 09 May 2005 19:35:38 +0200 |
| User-agent: | Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.7) Gecko/20050417 Fedora/1.7.7-1.3.1 |
The only time it makes a difference is when the drive is empty. If there's a disc in the drive then both methods will work. But if the drive is empty then the kernel will fail the open unless you specifyO_NONBLOCK (in a way that's saying you want to talk to the drive rather than the media).
There has been some discussion if a CdIo_t object always refers to a disk, or if can also refer to an empty drive. The BSD behaviour regarding O_NONBLOCK is identical to Linux. An empty drive can be detected by checking if cdio_get_last_track_num() returns CDIO_INVALID_TRACK. Maybe a simple boolean cdio_has_media() would be better? The question is, can we make a uniform behaviour on all supported architectures? -- _____________________________ Dr.-Ing. Burkhard Plaum Institut fuer Plasmaforschung Pfaffenwaldring 31 70569 Stuttgart Tel.: +49 711 685-2187 Fax.: -3102
| [Prev in Thread] | Current Thread | [Next in Thread] |