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| sigprocmask |
| Portability: | POSIX.1 conforming |
| SYNOPSIS | |
| DESCRIPTION | |
| RETURN VALUE | |
| EXAMPLE | |
| RELATED FUNCTIONS | |
| SEE ALSO |
| SYNOPSIS |
#include <lcsignal.h> int sigprocmask(int block, const sigset_t *newset, sigset_t *oldset);
The synopsis for the POSIX implementation is
#include <signal.h> int sigprocmask(int block, const sigset_t *newset, sigset_t *oldset);
You
should use
<signal.h>
only if an appropriate
feature test macro has been defined.
| DESCRIPTION |
sigprocmask
modifies the signal mask of the calling program.
block
specifies the
type of modification. Values for
block
are
| SIG_BLOCK |
specifies that the signals in
newset
should be blocked (other signals are not
changed). |
| SIG_UNBLOCK |
specifies that the signals in
newset
should not be blocked (other signals are
not changed). |
| SIG_SETMASK |
specifies that exactly the set of
signals specified by
newset
should be blocked. |
The
newset
and
oldset
arguments are both pointers to structures
of type
sigset_t
, which is declared in
<lcsignal.h>
and
<signal.h>
. The
newset
argument
is the new set of signals that should be blocked or unblocked. If
newset
is NULL, then the mask is not changed.
oldset
is a pointer to a signal set where the previous set of blocked
signals is to be stored. If
oldset
is
NULL, the previous signal mask is not stored.
You can use the
sigprocmask
function to change the blocking of signals that are managed by either
SAS/C or USS. If
oesigsetup
has not been
called, any attempt to change the blocking status of signals managed by USS
is ignored.
| RETURN VALUE |
sigprocmask
returns 0 if it is successful and -1 if it is not successful.
| EXAMPLE |
See the example for
sigsetjmp
.
| RELATED FUNCTIONS |
| SEE ALSO |
|
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Copyright © 2001 by SAS Institute Inc., Cary, NC, USA. All rights reserved.