cd_drec(3) — Subroutines

NAME

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

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 );

LIBRARY

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

PARAMETERS

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

fsecSpecifies 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.

[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.

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