Manual Pages  — ACL_CALC_MASK

acl_calc_mask – calculate and set ACL mask permissions

LIBRARY SYNOPSIS DESCRIPTION RETURN VALUES ERRORS SEE ALSO STANDARDS HISTORY AUTHORS

Standard C Library (libc, -lc)

#include <sys/types.h>

#include <sys/acl.h>

int
acl_calc_mask(acl_t *acl_p);

The acl_calc_mask() function is a POSIX.1e call that calculates and set the permissions associated with the ACL_MASK ACL entry of the ACL referred to by acl_p.

The value of new permissions are the union of the permissions granted by the ACL_GROUP, ACL_GROUP_OBJ, ACL_USER tag types which match processes in the file group class contained in the ACL referred to by acl_p.

If the ACL referred to by acl_p already contains an ACL_MASK entry, its permissions shall be overwritten; if it does not contain an ACL_MASK entry, one shall be added.

The acl_calc_mask function returns the value 0 if successful; otherwise the value -1 is returned and the global variable errno is set to indicate the error.

The acl_calc_mask() function fails if:

[EINVAL]
	Argument acl_p does not point to a pointer to a valid ACL.

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

POSIX.1e support was introduced in FreeBSD 4.0 . The acl_calc_mask() function was added in FreeBSD 5.0 .

The acl_calc_mask() function was written by Chris D. Faulhaber <Mt jedgar@fxp.org>.