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SIGSUSPEND(2) Linux Programmer's Manual SIGSUSPEND(2)
NAME
sigsuspend - wait for a signal
SYNOPSIS
#include <signal.h>
int sigsuspend(const sigset_t *mask);
DESCRIPTION
sigsuspend() temporarily replaces the signal mask of the calling pro-
cess 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 sig-
nals 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.
NOTES
Normally, sigsuspend() is used in conjunction with sigprocmask() in
order to prevent delivery of a signal during the execution of a criti-
cal code section. The caller first blocks the signals with sigproc
mask(). 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() (in the oldset argument).
See sigsetops(3) for details on manipulating signal sets.
CONFORMING TO
POSIX.1-2001.
SEE ALSO
kill(2), pause(2), sigaction(2), signal(2), sigprocmask(2), sigwait
info(2), sigsetops(3), signal(7)
Linux 2.6.13 2005-09-15 SIGSUSPEND(2)
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This page was generated on Tue Feb 13 02:17:36 GMT 2007
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