Content-type: text/html Man page of cd_defs

cd_defs

Section: C Library Functions (3)
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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 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 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.

[DIGITAL]  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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Index

NAME
LIBRARY
SYNOPSIS
PARAMETERS
DESCRIPTION
RESTRICTIONS
RETURN VALUES
ERRORS
RELATED INFORMATION

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Time: 02:41:35 GMT, October 02, 2010