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MAC_SET(3)	       FreeBSD Library Functions Manual		    MAC_SET(3)

NAME
     mac_set_file, mac_set_fd, mac_set_proc -- set the MAC label for a file or
     process

LIBRARY
     Standard C	Library	(libc, -lc)

SYNOPSIS
     #include <sys/mac.h>

     int
     mac_set_file(const	char *path, mac_t label);

     int
     mac_set_link(const	char *path, mac_t label);

     int
     mac_set_fd(int fd,	mac_t label);

     int
     mac_set_proc(mac_t	label);

DESCRIPTION
     The mac_set_file()	and mac_set_fd() functions associate a MAC label spec-
     ified by label to the file	referenced to by path_p, or to the file
     descriptor	fd, respectively.  Note	that when a file descriptor references
     a socket, label operations	on the file descriptor act on the socket, not
     on	the file that may have been used as a rendezvous when binding the
     socket.  The mac_set_link() function is the same as mac_set_file(),
     except that it does not follow symlinks.

     The mac_set_proc()	function associates the	MAC label specified by label
     to	the calling process.

     A process is allowed to set a label for a file only if it has MAC write
     access to the file, and its effective user	ID is equal to the owner of
     the file, or has appropriate privileges.

RETURN VALUES
     The mac_set_fd(), mac_set_file(), mac_set_link(), and mac_set_proc()
     functions return the value	0 if successful; otherwise the value -1	is
     returned and the global variable errno is set to indicate the error.

ERRORS
     [EACCES]		MAC write access to the	file is	denied.

     [EBADF]		The fd argument	is not a valid file descriptor.

     [EINVAL]		The label argument is not a valid MAC label, or	the
			object referenced by fd	is not appropriate for label
			operations.

     [EOPNOTSUPP]	Setting	MAC labels is not supported by the file	refer-
			enced by fd.

     [EPERM]		The calling process had	insufficient privilege to
			change the MAC label.

     [EROFS]		File system for	the object being modified is read
			only.

     [ENAMETOOLONG]	The length of the pathname in path_p exceeds PATH_MAX,
			or a component of the pathname is longer than
			NAME_MAX.

     [ENOENT]		The file referenced by path_p does not exist.

     [ENOTDIR]		A component of the pathname referenced by path_p is
			not a directory.

SEE ALSO
     mac(3), mac_free(3), mac_get(3), mac_is_present(3), mac_prepare(3),
     mac_text(3), posix1e(3), mac(4), mac(9)

HISTORY
     Support for Mandatory Access Control was introduced in FreeBSD 5.0	as
     part of the TrustedBSD Project.

FreeBSD	9.3		       January 14, 2003			   FreeBSD 9.3

NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | ERRORS | SEE ALSO | HISTORY

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