PXFSIGPROCMASK (L*X, M*X)

POSIX Subroutine: Changes the list of currently blocked signals.

Module: USE IFPOSIX

Syntax

CALL PXFSIGPROCMASK (ihow, jsigset, josigset, ierror)

ihow
(Input) INTEGER(4). Defines the action for jsigset.


jsigset
(Input) INTEGER(4). A handle of structure sigset. The signals to examine.


josigset
(Input) INTEGER(4). A handle of structure sigset. Stores the previous mask of blocked signals.


ierror
(Output) INTEGER(4). The error status.

If successful, ierror is set to zero; otherwise, an error code.

The argument ihow indicates the way in which the set is to be changed, and consists of one of the following constant names:

Constant1 Action
SIG_BLOCK The resulting set of blocked signals will be the union of the current signal set and the jsigset signal set.
SIG_UNBLOCK The resulting set of blocked signals will be the current set of blocked signals with the signals in jsigset removed. It is legal to attempt to unblock a signal that is not blocked.
SIG_SETMASK The resulting set of blocked signals will be the jsigset signal set.
1 These names can be used in PXFCONST or IPXFCONST.

If josigset is non-zero, the previous value of the signal mask is stored in the structure associated with handle josigset.

See Also

IPXFCONST, PXFCONST