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cd_pvd

Section: C Library Functions (3)
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NAME

cd_pvd, cd_cpvd - Reads the Primary Volume Descriptor from a CD-ROM  

LIBRARY

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

SYNOPSIS

#include <sys/cdrom.h> int cd_pvd (        char *path,
       struct iso9660_pvd *pvd );
int cd_cpvd (        char *path,
       char *addr );
 

PARAMETERS

Points to a pathname that names a file or directory within a CD-ROM File System hierarchy, or to a block-special file for a CD-ROM File System.
Points to the iso9660_pvd structure that holds the contents of the Primary Volume Descriptor from the CD-ROM. The iso9660_pvd structure is defined in cdfs/xcdr.h, an include file that is called into sys/cdrom.h
Points to the address to which the Primary Volume Descriptor on the CD-ROM is copied.
 

DESCRIPTION

The function cd_pvd fills the *pvd structure with the contents of the Primary Volume Descriptor from the CD-ROM. To execute this function successfully, the user must have read or execute permission for the file or directory pointed to by *path

The function cd_cpvd copies the complete Primary Volume Descriptor that is recorded on the CD-ROM to the address pointed to by *addr. The user must allocate {CD_PVDLEN} bytes for the Primary Volume Descriptor. The variable {CD_PVDLEN} 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: Search permission is denied for a directory in *path or read permission is denied for the file, directory, or block special file pointed to by *path. The address of *path or *pvd is invalid. A signal was caught during execution of the function. The argument *path points to a file or directory that is not within the CD-ROM file hierarchy.
The named file is a block special file and the CD-ROM is not recorded according to the ISO 9660 standard. {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. 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. The system file table is full. A component of *path does not exist, or the *path argument points to an empty string. A component of the *path prefix is not a directory. 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 file does not exist.
 

RELATED INFORMATION

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

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Index

NAME
LIBRARY
SYNOPSIS
PARAMETERS
DESCRIPTION
RETURN VALUES
ERRORS
RELATED INFORMATION

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Time: 02:41:47 GMT, October 02, 2010