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cd_suf(3)
NAME
  cd_suf - read System Use Field from a specified System Use Area on a Rock
  Ridge format CD-ROM

SYNOPSIS
  #include <sys/cdrom.h>

  int cd_suf(
	  char *path,
	  int fsec,
	  char signature[2],
	  int index,
	  char *buf,
	  int buflen );

LIBRARY
  CD-ROM library (libcdrom.so, libcdrom.a)

PARAMETERS
  path
      Points to a file or directory within the CD-ROM file hierarchy.

  fsec
      Specifies the File Section of that file. The numbering starts with one.
      If fsec is set to -1, the System Use Area of the last File Section of
      that file is assumed.

  signature
      The 2-byte signature to look for and return from the System Use Area.

  index
      The occurrence of signature to return. If signature is a NULL pointer,
      returns the System Use Field specified by index starting from the
      beginning of the System Use Area. Otherwise, returns the occurrence of
      signature specified by index. The index number of the first System Use
      Field of any signature is one.

  buf The buffer in which to place the System Use Field.

  buflen
      The buffer length of buf.

DESCRIPTION
  The cd_suf() function returns a System Use Field in the System Use Area for
  path.

RETURN VALUES
  The cd_suf() function will return the number of bytes placed in buf if
  successful. The cd_suf() function will return 0 if the signature field is
  not found. In case of error, -1 is returned and errno is set to indicate
  the error.

ERRORS
  The cd_suf() function will fail if:

  [EACCESS]
      Search permission is denied for a component of the path prefix or read
      permission on the file or directory pointed to by path is denied.

  [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.

  [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 System Use
      Area.

  [ENOTDIR]
      A component of the path prefix is not a directory.

  [EFAULT]
      The address of buf, signature, or path is invalid.

  [EINVAL]
      The value of fsec, index, or buflen is invalid. The argument path
      points to a file or directory not within a CD-ROM file hierarchy.

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

  [ENXIO]
      The CD-ROM is not in the drive or a read error occurred.

  [EINTR]
      A signal was caught during the cd_suf() function.

  [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.

  [ENFILE]
      The system file table is full.

SEE ALSO
  Commands: cdsuf(1)

  Files: <sys/cdrom.h>

Index for Section 3

Alphabetical listing for C

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