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    Command:

    acl_calc_mask

    
    
    
    

    SYNOPSIS

         #include <sys/types.h>
         #include <sys/acl.h>
    
         int
         acl_calc_mask(acl_t *acl_p);
    
    
    

    DESCRIPTION

         The acl_calc_mask() function calculates and sets the permissions associ-
         ated with the ACL_MASK ACL entry of the ACL referred to by acl_p.  The
         value of the new permissions is the union of the permissions granted by
         all entries of tag type ACL_GROUP, ACL_GROUP_OBJ, or ACL_USER.  If the
         ACL referred to by acl_p already contains an ACL_MASK entry, its permis-
         sions are overwritten; if it does not contain an ACL_MASK entry, one is
         added.
    
         If the ACL referred to by acl_p does not contain enough space for the new
         ACL entry, then additional working storage may be allocated. If the work-
         ing storage cannot be increased in the current location, then it may be
         relocated and the previous working storage is released and a pointer to
         the new working storage is returned via acl_p.
    
         The order of existing entries in the ACL is undefined after this func-
         tion.
    
         Any existing ACL entry descriptors that refer to entries in the ACL con-
         tinue to refer to those entries. Any existing ACL pointers that refer to
         the ACL referred to by acl_p continue to refer to the ACL.
    
    
    

    RETURN VALUE

         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.
    
    
    

    ERRORS

         If any of the following conditions occur, the acl_calc_mask() function
         returns -1 and sets errno to the corresponding value:
    
         [EINVAL]           The argument acl is not a valid pointer to an ACL.
    
         [ENOMEM]           The acl_calc_mask() function is unable to allocate the
                            memory required for an ACL_MASK ACL entry.
    
    
    

    STANDARDS

         IEEE Std 1003.1e draft 17 ("POSIX.1e", abandoned)
    
    
    

    SEE ALSO

         acl_check(3), acl_get_entry(3), acl_valid(3), acl(5)
    
    
    

    AUTHOR

         Derived from the FreeBSD manual pages written by Robert N M Watson
    
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