Copyright (c) 2001 Chris D. Faulhaber
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$FreeBSD$
.Dd March 10, 2001 .Dt ACL_CALC_MASK 3 .Os .Sh NAME .Nm acl_calc_mask .Nd calculate and set ACL mask permissions .Sh LIBRARY .Lb libc .Sh SYNOPSIS n sys/types.h n sys/acl.h .Ft int .Fn acl_calc_mask "acl_t *acl_p" .Sh DESCRIPTION The .Fn acl_calc_mask function is a POSIX.1e call that calculates and set the permissions associated with the .Dv ACL_MASK ACL entry of the ACL referred to by .Fa acl_p .
p The value of new permissions are the union of the permissions granted by the .Dv ACL_GROUP , ACL_GROUP_OBJ , ACL_USER tag types which match processes in the file group class contained in the ACL referred to by .Fa acl_p .
p If the ACL referred to by .Fa acl_p already contains an .Dv ACL_MASK entry, its permissions shall be overwritten; if it does not contain an .Dv ACL_MASK entry, one shall be added. .Sh RETURN VALUES .Rv -std acl_calc_mask .Sh ERRORS The .Fn acl_calc_mask function fails if: l -tag -width Er t Bq Er EINVAL Argument .Fa acl_p does not point to a pointer to a valid ACL. .El .Sh SEE ALSO .Xr acl 3 , .Xr acl_get_entry 3 , .Xr acl_valid 3 , .Xr posix1e 3 .Sh STANDARDS POSIX.1e is described in IEEE POSIX.1e draft 17. .Sh HISTORY POSIX.1e support was introduced in .Fx 4.0 . The .Fn acl_calc_mask function was added in .Fx 5.0 . .Sh AUTHORS The .Fn acl_calc_mask function was written by .An Chris D. Faulhaber Aq jedgar@fxp.org .