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mac_get_fd (3)

>> mac_get_fd (3) ( FreeBSD man: Библиотечные вызовы )

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NAME



mac_get_file

 
mac_get_link

 
mac_get_fd

 
mac_get_peer

 
mac_get_pid

 
mac_get_proc

 - get the label of a file, socket, socket peer or process

LIBRARY

Lb libc

SYNOPSIS

#include <sys/mac.h>
int mac_get_file (const char *path mac_t label);
int mac_get_link (const char *path mac_t label);
int mac_get_fd (int fd mac_t label);
int mac_get_peer (int fd mac_t label);
int mac_get_pid (pid_t pid mac_t label);
int mac_get_proc (mac_t label);

DESCRIPTION

The mac_get_file ();
system call returns the label associated with a file specified by pathname. The mac_get_link ();
function is the same as mac_get_file (,);
except that it does not follow symlinks.

The mac_get_fd ();
system call returns the label associated with an object referenced by the specified file descriptor. Note that in the case of a file system socket, the label returned will be the socket label, which may be different from the label of the on-disk node acting as a rendezvous for the socket. The mac_get_peer ();
system call returns the label associated with the remote endpoint of a socket; the exact semantics of this call will depend on the protocol domain, communications type, and endpoint; typically this label will be cached when a connection-oriented protocol instance is first set up, and is undefined for datagram protocols.

The mac_get_pid ();
and mac_get_proc ();
system calls return the process label associated with an arbitrary process ID, or the current process.

Label storage for use with these calls must first be allocated and prepared using the mac_prepare3 functions. When an application is done using a label, the memory may be returned using mac_free3.

ERRORS

Bq Er EACCES: A component of Fa path is not searchable, or MAC read access to the file is denied.
Bq Er EINVAL: The requested label operation is not valid for the object referenced by Fa fd .
Bq Er ENAMETOOLONG: The pathname pointed to by Fa path exceeds PATH_MAX or a component of the pathname exceeds NAME_MAX
Bq Er ENOENT: A component of Fa path does not exist.
Bq Er ENOMEM: Insufficient memory is available to allocate a new MAC label structure.
Bq Er ENOTDIR: A component of Fa path is not a directory.

STANDARDS

POSIX.1e is described in IEEE POSIX.1e draft 17. Discussion of the draft continues on the cross-platform POSIX.1e implementation mailing list. To join this list, see the Fx POSIX.1e implementation page for more information.