osf1 man page for cd_setdevmap

cd_setdevmap(3) 					     Library Functions Manual						   cd_setdevmap(3)

NAME
       cd_setdevmap - Set mappings of major/minor numbers of a file on a Rock Ridge format CD-ROM

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

SYNOPSIS
       #include <sys/cdrom.h>

       int cd_setdevmap (path, cmd, new_major, new_minor)
		char *path;
		int cmd;
		int *new_major;
		int *new_minor;

DESCRIPTION
       This function sets or unsets (based on cmd) the major and minor numbers of one device file on a mounted Rock Ridge format CD-ROM. The argu-
       ment path points to a file or directory within the CD-ROM file hierarchy.

       If cmd is CD_SETDMAP, this function maps the new_major major number and the new_minor minor number to the device file pointed to  by  path.
       The  new_major  argument  specifies the new major number for the device file. The new_minor argument specifies the new minor number for the
       device file. Any device file mapping for the device file path set with a previous invocation of cd_setdevmap() is overridden by this  invo-
       cation of cd_setdevmap().

       If  cmd	is  CD_UNSETDMAP,  this function unmaps the mapped major and minor numbers of the device file pointed to by path. The value of the
       recorded major number on the CD-ROM shall be returned in new_major. The value of the recorded minor number on the CD-ROM shall be  returned
       in new_minor.

RETURN VALUES
       For  CD_SETDMAP,  cd_setdevmap  will  return  one  if the device file is successfully mapped (a return value of zero means no more mappings
       allowed).

       For CD_UNSETDMAP, cd_setdevmap will return one if the device file is successfully unmapped (a  return  value  of  zero  means  mapping  not
       found).

       In case of error, -1 is returned and errno is set to indicate the error.

RESTRICTIONS
       The  use of cd_setdevmap() is restricted to the superuser.  The maximum number of mappings is defined in <sys/cdrom.h>.	Mappings should be
       established before affected device files are used. If this function is applied for device files that have already been opened,  the  effect
       of this function on these files is undefined. The device file mappings for a mounted CD-ROM are eliminated when the CD-ROM is unmounted.

ERRORS
       Search  permission  is  denied  for a component of the path prefix or read permission on the device file pointed to by path is denied.  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.	 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
       address of path, new_major, or new_minor is invalid.  The value of cmd is invalid. The argument path points to  a  file	or  directory  not
       within  a  CD-ROM  file	hierarchy.  The file pointed to by path is not a device file.  User does not have appropriate privileges to set or
       unset device file major/minor values.  The CD-ROM is not in the drive or a read error occurred.	A signal was caught during  the  cd_setde-
       vmap() function.  {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 system file table is full.

RELATED INFORMATION
       Commands: cddevsuppl(8)

       Functions: cd_getdevmap(3)

       Files: <sys/cdrom.h> delim off

																   cd_setdevmap(3)