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ACL_VALID(3)		 BSD Library Functions Manual		  ACL_VALID(3)

NAME
     acl_valid, acl_valid_fd_np, acl_valid_file_np, acl_valid_link_np — vali‐
     date an ACL

LIBRARY
     Standard C Library (libc, -lc)

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

     int
     acl_valid(acl_t acl);

     int
     acl_valid_fd_np(int fd, acl_type_t type, acl_t acl);

     int
     acl_valid_file_np(const char *path_p, acl_type_t type, acl_t acl);

     int
     acl_valid_link_np(const char *path_p, acl_type_t type, acl_t acl);

DESCRIPTION
     These functions check that the ACL referred to by the argument acl is
     valid.  The POSIX.1e routine, acl_valid(), checks assumes
     ACL_TYPE_EXTENDED, and disregard of the context in which the ACL is to be
     used.  The non-portable forms, acl_valid_fd_np(), acl_valid_file_np(),
     and acl_valid_link_np() allow an ACL to be checked in the context of a
     specific acl type, type, and file system object.  In environments where
     additional ACL types are supported than just POSIX.1e, this makes more
     sense.  Whereas acl_valid_file_np() will follow the symlink if the speci‐
     fied path is to a symlink, acl_valid_link_np() will not.

     The qualifier field shall be unique among all entries of the same
     POSIX.1e ACL facility defined tag type.  The tag type field shall contain
     valid values including any implementation-defined values.	Validation of
     the values of the qualifier field is implementation-defined.

     The POSIX.1e acl_valid() function may reorder the ACL for the purposes of
     verification; the non-portable validation functions will not.

RETURN VALUES
     Upon successful completion, the value 0 is returned; otherwise the
     value -1 is returned and the global variable errno is set to indicate the
     error.

ERRORS
     If any of the following conditions occur, these functions shall return -1
     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]		Argument acl does not point to a valid ACL.

			One or more of the required ACL entries is not present
			in acl.

			The ACL contains entries that are not unique.

			The file system rejects the ACL based on fs-specific
			semantics issues.

     [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_get(3), acl_init(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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