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cd_xar(3)
NAME
  cd_xar, cd_cxar - reads the Extended Attribute Record for a CD-ROM file or
  directory from the CD-ROM

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 );

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

PARAMETERS
  *path
      Points to the 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.

  *xar
      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

  applen
      Used in conjunction with esclen, determines how many bytes will be
      copied to the address specified by the *xar structure member app_use.

  esclen
      Used in conjunction with applen, determines how many bytes will be
      copied to the address specified by the *xar structure member esc_seq.

  *addr
      Specifies the address where the function cd_cxar copies the XAR that is
      recorded on the CD-ROM.

  xarlen
      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:

  [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 or xarlen 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.

  [ENODEV]
      The Volume containing the File Section indicated by fsec is not
      mounted.

  [ENOENT]
      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.

  [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.

SEE ALSO
  Functions: cd_drec(3)

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

Index for Section 3

Alphabetical listing for C

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