cd_defs(3)cd_defs(3)NAMEcd_defs - sets or gets default values for the User or Group ID, or for
file or directory permissions
SYNOPSIS
#include <sys/cdrom.h>
int cd_defs(
char *path,
int cmd,
struct cd_defs *defs );
LIBRARY
Rock Ridge and X/Open Extensions to the CDFS library (libcdrom.so,
libcdrom.a)
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 permissions 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
CD-ROM File System. The value of cmd or values of members of the
cd_defs structure are invalid. {OPEN_MAX} file descriptors are cur‐
rently 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.
SEE ALSO
Files: cdfs/xcdr.h, sys/cdrom.h
cd_defs(3)
