Content-type: text/html Man page of cd_xar

cd_xar

Section: C Library Functions (3)
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NAME

cd_xar, cd_cxar - Reads the Extended Attribute Record for a CD-ROM file or directory from the CD-ROM  

LIBRARY

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

SYNOPSIS

#include <sys/cdrom.h> int cd_xar (        char *path,
       int fsec,
       struct iso9660_xar *xar,
       int applen,
       int esclen );
int cd_cxar (        char *path,
       int fsec,
       char *addr,
       int xarlen );
 

PARAMETERS

Points to the file or directory within the CD-ROM File System hierarchy.
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.
Points to the iso9660_xar structure that holds the Extended Attribute Record (XAR) information. The iso9660_xar structure is defined in cdfs/xcdr.h, an include file that is called into sys/cdrom.h
Used in conjunction with esclen, determines how many bytes will be copied to the address specified by the *xar structure member app_use.
Used in conjunction with applen, determines how many bytes will be copied to the address specified by the *xar structure member esc_seq.
Specifies the address where the function cd_cxar copies the XAR that is recorded on the CD-ROM.
Determines if part or all of the XAR will be read.
 

DESCRIPTION

The cd_xar routine fills the *xar structure with the contents of the Extended Attribute Record (XAR) that is associated with the file or directory pointed to by *path.

The total number of logical blocks of an XAR can be obtained by calling the cd_drec function. The Logical Block Size in bytes can be obtained by calling the cd_pvd function. The length of the fixed part of the XAR is given by {CD_XARFIXL}. The variable {CD_XARFIXL} is defined in cdfs/xcdr.h, an include file that is called into sys/cdrom.h.

The cd_cxar function copies the XAR as recorded on the CD-ROM to the address pointed to by *addr.  

RETURN VALUES

If successful, the routines return the following values:

The cd_xar function returns the number of bytes copied for the variable part of the XAR.

The cd_cxar function returns the number of bytes copied.
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 or directory pointed to by *path. The address of *path or *addr 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 value of fsec or xarlen is invalid. {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. The Volume containing the File Section indicated by fsec is not mounted. A component of *path does not exist, or the *path argument points to an empty string.
The File Section indicated by fsec has no XAR. A component of the *path prefix is not a directory. The CD-ROM is not in the drive, or a read error occurred.
 

RELATED INFORMATION

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

Functions: cd_drec(3)

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Index

NAME
LIBRARY
SYNOPSIS
PARAMETERS
DESCRIPTION
RETURN VALUES
ERRORS
RELATED INFORMATION

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Time: 02:41:55 GMT, October 02, 2010