sigsuspend(S)
sigsuspend --
wait for signal(s)
Syntax
cc . . . -lc
#include <signal.h>
int sigsuspend(const sigset_t *sigmask);
Description
A call to the sigsuspend
routine replaces the process's signal mask with the signal set
to which the argument sigmask points.
The routine then suspends the process until it receives a signal
whose associated action is to either terminate the process
or execute a signal-catching function.
If the action is to execute a signal-catching function, the
sigsuspend
routine returns immediately after the signal-catching function does.
The signal mask is restored to the
value it held before the call to the
sigsuspend routine.
If the action calls for the termination of the process,
the sigsuspend routine does not return.
As with all signal routines,
un-ignorable signals cannot be blocked
(see
signal(S).
or
sigaction(S)).
The system enforces this restriction
without indicating an error.
Return value
Because the
sigsuspend
function suspends process execution indefinitely,
no successful completion value is returned. A value of
-1 is returned and errno
is set to indicate the error.
Diagnostics
If the following condition occurs, the
sigsuspend
function returns -1 and sets
errno
to the corresponding value:
[EINTR]-
A signal is caught by the calling process and control is
returned from the signal-catching function.
See also
pause(S),
sigaction(S),
signal(M),
signal(S),
sigpending(S),
sigprocmask(S),
sigset(S),
sigsetjmp(S)
sigsetv(S),
Standards conformance
sigsuspend is conformant with:
IEEE POSIX Std 1003.1-1990 System Application Program Interface (API) [C Language] (ISO/IEC 9945-1)
;
X/Open Portability Guide, Issue 3, 1989
;
and
NIST FIPS 151-1
.
© 2003 Caldera International, Inc. All rights reserved.
SCO OpenServer Release 5.0.7 -- 11 February 2003