NAME

cd_drec, cd_cdrec - Reads the Directory Record from a CD-ROM directory

LIBRARY

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

SYNOPSIS

#include <sys/cdrom.h> int cd_drec (
char ∗path,
int fsec,
struct iso9660_drec ∗drec ); int cd_cdrec (
char ∗path,
int fsec,
char ∗addr );

PARAMETERS

∗path

Points to a file or directory within the CD-ROM File System hierarchy. 

fsec

Specifies the File Section of the file or directory pointed to by ∗path, with the numbering beginning at one.  If fsec is set to -1, the last File Section of the named file or the only File Section of the named directory is assumed. 

∗drec

Points to the iso9660_drec structure that holds the contents of the Directory Record associated with the file or directory pointed to by ∗path.  The iso9660_drec structure is defined in cdfs/xcdr.h, an include file that is called into sys/cdrom.h. 

∗addr

Specifies the address to which the function cd_cdrec copies the complete Directory Record that is recorded on the CD-ROM. 

DESCRIPTION

The cd_drec routine fills the ∗drec structure with the contents of the Directory Record that is associated with a file or directory pointed to by ∗path. 

The cd_cdrec function copies the complete Directory Record from the CD-ROM to the address pointed to by ∗addr.  The user must allocate {CD_MAXDRECL} bytes for the Directory Record.  The variable {CD_MAXDRECL} is defined in cdfs/xcdr.h, an include file that is called into sys/cdrom.h. 

RETURN VALUES

If successful, the value zero is returned. 
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 permission is denied for the file or directory pointed to by ∗path. 

[EFAULT]The address of ∗path or ∗addr 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. 

The value of fsec is invalid. 

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

[DIGITAL]  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. 

RELATED INFORMATION

Files: cdfs/xcdr.h, sys/cdrom.h.