Arguments

 

disable-mask

   OpenVMS usage:mask_longword
   type:         longword (unsigned)
   access:       read only
   mechanism:    by reference

   Bit mask indicating which control characters are not to be
   intercepted. The disable-mask argument is the address of an
   unsigned longword containing this bit mask.

   Each of the 32 bits corresponds to one of the 32 possible control
   characters. If a bit is set, the corresponding control character
   is no longer intercepted by the CLI. Currently, only bits 20 and
   25, corresponding to Ctrl/T and Ctrl/Y, are recognized.

   The following mask is defined in symbol libraries supplied by VSI
   to specify the value of disable-mask:

   Symbol          Hex Value     Function

   LIB$M_CLI_      %X'00100000'  Disables Ctrl/T
   CTRLT
   LIB$M_CLI_      %X'02000000'  Disables Ctrl/Y
   CTRLY

   If a set bit does not correspond to a character that the CLI can
   intercept, LIB$DISABLE_CTRL returns an error.
 

 

old-mask

   OpenVMS usage:mask_longword
   type:         longword (unsigned)
   access:       write only
   mechanism:    by reference

   Previous bit mask. The old-mask argument is the address of an
   unsigned longword into which LIB$DISABLE_CTRL writes the old bit
   mask. The old bit mask is of the same form as disable-mask and
   indicates those control characters that were previously enabled.
   It may therefore be given to LIB$ENABLE_CTRL to reinstate the
   previous condition.