SIGSUSPEND
Section: Linux Programmer's Manual (2)
Updated: 2008-08-29
NAME
sigsuspend - wait for a signal
SYNOPSIS
#include <signal.h>
int sigsuspend(const sigset_t *mask);
Feature Test Macro Requirements for glibc (see
feature_test_macros(7)):
sigsuspend():
_POSIX_C_SOURCE >= 1 || _XOPEN_SOURCE || _POSIX_SOURCE
DESCRIPTION
sigsuspend()
temporarily replaces the signal mask of the calling process with the
mask given by
mask
and then suspends the process until delivery of a signal whose
action is to invoke a signal handler or to terminate a process.
If the signal terminates the process, then
sigsuspend()
does not return.
If the signal is caught, then
sigsuspend()
returns after the signal handler returns,
and the signal mask is restored to the state before the call to
sigsuspend().
It is not possible to block
SIGKILL
or
SIGSTOP;
specifying these signals in
mask,
has no effect on the process's signal mask.
RETURN VALUE
sigsuspend()
always returns -1, normally with the error
EINTR.
ERRORS
- EFAULT
-
mask
points to memory which is not a valid part of the process address space.
- EINTR
-
The call was interrupted by a signal.
CONFORMING TO
POSIX.1-2001.
NOTES
Normally,
sigsuspend()
is used in conjunction with
sigprocmask(2)
in order to prevent delivery of a signal during the execution of a
critical code section.
The caller first blocks the signals with
sigprocmask(2).
When the critical code has completed, the caller then waits for the
signals by calling
sigsuspend()
with the signal mask that was returned by
sigprocmask(2)
(in the
oldset
argument).
See
sigsetops(3)
for details on manipulating signal sets.
SEE ALSO
kill(2),
pause(2),
sigaction(2),
signal(2),
sigprocmask(2),
sigwaitinfo(2),
sigsetops(3),
sigwait(3),
signal(7)
COLOPHON
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man-pages
project.
A description of the project,
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can be found at
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Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ERRORS
-
- CONFORMING TO
-
- NOTES
-
- SEE ALSO
-
- COLOPHON
-
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Time: 07:34:55 GMT, March 26, 2013