cd_type(3) — Subroutines

NAME

cd_type − determines the type of file system recorded on a CD-ROM

SYNOPSIS

#include <sys/cdrom.h>
int cd_type(
char ∗path );

LIBRARY

Rock Ridge and X/Open Extensions to the CDFS library (libcdrom.so, libcdrom.a)

PARAMETERS

∗path
Points to a pathname naming a file or directory within the CD-ROM File System hierarchy, or to a pathname naming the block special file for the CD-ROM File System.

DESCRIPTION

The cd_type() routine determines the type of file system recorded on the CD-ROM pointed to by ∗path.

RETURN VALUES

If successful, the cd_type() function returns one of the following values, which are defined in cdfs/xcdr.h, an include file that is called into sys/cdrom.h:

{CD_ISO9660} −− CD-ROM is recorded according to ISO 9660.

{CD_HSG} −− CD-ROM is recorded according to High Sierra Group.

{CD_RRIP} −− CD-ROM is recorded according to ISO 9660 with the Rock Ridge Extension.

If unsuccessful, the integer -1 is returned and errno is set to indicate the error.

ERRORS

The function will fail if:

[EACCES]
Search permission is denied for a directory in ∗path or read and execute permission are denied for the named file, or read permission is denied on the block special file pointed to by ∗path.

[EFAULT]
The address of ∗path is invalid.

[EINTR]
A signal was caught during execution of the function.

[EINVAL]
The argument ∗path points to a file or directory that is not within the CD-ROM file hierarchy.

[EMFILE]
{OPEN_MAX} file descriptors are currently open in the calling process.

[Tru64 UNIX] Either the OPEN_MAX value or the per-process soft descriptor limit is checked.

[ENAMETOOLONG]
The length of the ∗path string exceeds {PATH_MAX}, or a pathname component is longer than {NAME_MAX} while {_POSIX_NO_TRUNC} is in effect.

[ENFILE]
The system file table is full.

[ENOENT]
A component of ∗path does not exist or the ∗path argument points to an empty string.

[ENOTDIR]
A component of the ∗path prefix is not a directory.

[ENXIO]
The CD-ROM is not in the drive or a read error occurred.

The named file is a block special file and the device associated with the special file does not exist.

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