cd_type(3X)

cd_type -- get CD-ROM format identification

Synopsis

   cc [flag . . . ] file . . . -lcdfs -lgen [library] . . .
   
   #include <sys/cdrom.h>
   

   int cd_type(const char *path);

cd_type determines the type of a CD-ROM and indicates the CD-ROM type in the return value.

path: File or directory within the CD-ROM file system, or block special file containing the CD-ROM file system.

On success, cd_type returns one of the following values:

CD_IS09660: The CD-ROM is recorded according to ISO-9660.
CDFS_HIGH_SIERRA: The CD-ROM is recorded according to High Sierra.
CDFS_UNDEF_FS_TYPE: The CD-ROM is recorded according to an unknown specification.

On failure, cd_type returns -1 and sets errno to indicate the error as follows:

EACCES: Search permission is denied on a component of path, or read permission is denied on the file, directory, or block special file that is pointed to by path.
EFAULT: Invalid address of path.
EINVAL: path points to a file or directory that is outside the CD-ROM file system.
EMFILE: The maximum number of file descriptors are open.
ENAMETOOLONG: The size of path exceeds MAXPATHLEN, or the component of a path name is longer than MAXNAMELEN while _POSIX_NO_TRUNC is in effect.
ENFILE: The system file table is full.
ENOENT: path does not exist or the path argument points to an empty string.
ENOTDIR: A component of path is not a directory.
ENXIO: path is a block special file and the device associated with it does not exist.
ENXIO: The CD-ROM is not in the drive or a read error occurred.