cd_defs(3)						     Library Functions Manual							cd_defs(3)

NAME

       cd_defs - Sets or gets default values for the User or Group ID, or for file or directory permissions

LIBRARY

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

SYNOPSIS

       #include <sys/cdrom.h> int cd_defs (	 char *path,	  int cmd,	struct cd_defs *defs );

PARAMETERS

	      Points to a mount-point of a CD-ROM File System.

	      Can  be  set  to either {CD_SETDEFS} to set or {CD_GETDEFS} to get the default values for the UID, GID, or file or directory permis-
	      sions for the mounted CD-ROM pointed to by *path.  The variables {CD_SETDEFS}  and  {CD_GETDEFS}	are  defined  in  cdfs/xcdr.h,	an
	      include file that is called into sys/cdrom.h.

	      Points  to  the  cd_defs structure that holds the default values for the UID, GID, and file or directory permissions for the mounted
	      CD-ROM pointed to by *path.  The cd_defs structure is defined in cdfs/xcdr.h, an include file that is called into sys/cdrom.h.

DESCRIPTION

       The cd_defs routine sets or gets the default values for UIDs, GIDs, or file or directory permissions for a mounted CD-ROM.

RESTRICTIONS

       Setting default values is restricted to users with the appropriate privileges.  This function is intended to be used to set default  values
       only  directly  after  the  CD-ROM  is  mounted	and before its files and directories are accessed.  Attempting to use this function to set
       default values after files or directories on the CD-ROM have been accessed may produce unpredictable results.

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  on  the	mount-point.   The
       address of *defs or *path is invalid.  A signal was caught during execution of the function.  The argument *path does not point to a mount-
       point of a CDROM File System.
       The value of cmd or values of members of the cd_defs structure are invalid.  {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.  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 user does not have the appropriate privileges to set values.

RELATED INFORMATION

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

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																	cd_defs(3)