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ACL_GET(3)		 BSD Library Functions Manual		    ACL_GET(3)

NAME
     acl_get_fd, acl_get_fd_np, acl_get_file, acl_get_link_np — get an ACL for
     a file

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <sys/types.h>
     #include <sys/acl.h>

     acl_t
     acl_get_fd(int fd);

     acl_t
     acl_get_fd_np(int fd, acl_type_t type);

     acl_t
     acl_get_file(const char *path_p, acl_type_t type);

     acl_t
     acl_get_link_np(const char *path_p, acl_type_t type);

DESCRIPTION
     The acl_get_fd(), acl_get_file(), acl_get_link_np(), and acl_get_fd_np()
     each allow the retrieval of an ACL from a file.  The acl_get_fd() is a
     POSIX.1e call that allows the retrieval of an ACL of type ACL_TYPE_ACCESS
     from a file descriptor.  The acl_get_fd_np() function is a non-portable
     form of acl_get_fd() that allows the retrieval of any type of ACL from a
     file descriptor.  The acl_get_file() function is a POSIX.1e call that
     allows the retrieval of a specified type of ACL from a file by name;
     acl_get_link_np() is a non-portable variation on acl_get_file() which
     does not follow a symlink if the target of the call is a symlink.

     These functions may cause memory to be allocated.	The caller should free
     any releasable memory, when the new ACL is no longer required, by calling
     acl_free(3) with the (void *)acl_t as an argument.

     The ACL in the working storage is an independent copy of the ACL associ‐
     ated with the object referred to by fd.  The ACL in the working storage
     shall not participate in any access control decisions.

RETURN VALUES
     Upon successful completion, the function shall return a pointer to the
     ACL that was retrieved.  Otherwise, a value of (acl_t)NULL shall be
     returned, and errno shall be set to indicate the error.

ERRORS
     If any of the following conditions occur, the acl_get_fd() function shall
     return a value of (acl_t)NULL and set errno to the corresponding value:

     [EACCES]		Search permission is denied for a component of the
			path prefix, or the object exists and the process does
			not have appropriate access rights.

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

     [EINVAL]		The ACL type passed is invalid for this file object.

     [ENAMETOOLONG]	A component of a pathname exceeded 255 characters, or
			an entire path name exceeded 1023 characters.

     [ENOENT]		The named object does not exist, or the path_p argu‐
			ment points to an empty string.

     [ENOMEM]		Insufficient memory available to fulfill request.

     [EOPNOTSUPP]	The file system does not support ACL retrieval.

SEE ALSO
     acl(3), acl_free(3), acl_get(3), acl_set(3), posix1e(3)

STANDARDS
     POSIX.1e is described in IEEE POSIX.1e draft 17.

AUTHORS
     Michael Smith
     Robert N M Watson

BSD			       December 29, 2002			   BSD
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