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+.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved 
+.TH "SIGSUSPEND" P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
+.\" sigsuspend 
+.SH NAME
+sigsuspend \- wait for a signal
+.SH SYNOPSIS
+.LP
+\fB#include <signal.h>
+.br
+.sp
+int sigsuspend(const sigset_t *\fP\fIsigmask\fP\fB); \fP
+\fB
+.br
+\fP
+.SH DESCRIPTION
+.LP
+The \fIsigsuspend\fP() function shall replace the current signal mask
+of the calling thread with the set of signals pointed to
+by \fIsigmask\fP and then suspend the thread until delivery of a signal
+whose action is either to execute a signal-catching
+function or to terminate the process. This shall not cause any other
+signals that may have been pending on the process to become
+pending on the thread.
+.LP
+If the action is to terminate the process then \fIsigsuspend\fP()
+shall never return. If the action is to execute a
+signal-catching function, then \fIsigsuspend\fP() shall return after
+the signal-catching function returns, with the signal mask
+restored to the set that existed prior to the \fIsigsuspend\fP() call.
+.LP
+It is not possible to block signals that cannot be ignored. This is
+enforced by the system without causing an error to be
+indicated.
+.SH RETURN VALUE
+.LP
+Since \fIsigsuspend\fP() suspends thread execution indefinitely, there
+is no successful completion return value. If a return
+occurs, -1 shall be returned and \fIerrno\fP set to indicate the error.
+.SH ERRORS
+.LP
+The \fIsigsuspend\fP() function shall fail if:
+.TP 7
+.B EINTR
+A signal is caught by the calling process and control is returned
+from the signal-catching function.
+.sp
+.LP
+\fIThe following sections are informative.\fP
+.SH EXAMPLES
+.LP
+None.
+.SH APPLICATION USAGE
+.LP
+Normally, at the beginning of a critical code section, a specified
+set of signals is blocked using the \fIsigprocmask\fP() function.
+When the thread has completed the critical section and needs to
+wait for the previously blocked signal(s), it pauses by calling \fIsigsuspend\fP()
+with the mask that was returned by the \fIsigprocmask\fP() call.
+.SH RATIONALE
+.LP
+None.
+.SH FUTURE DIRECTIONS
+.LP
+None.
+.SH SEE ALSO
+.LP
+\fISignal Concepts\fP , \fIpause\fP() , \fIsigaction\fP() , \fIsigaddset\fP()
+, \fIsigdelset\fP() , \fIsigemptyset\fP() , \fIsigfillset\fP() , the
+Base Definitions volume of IEEE\ Std\ 1003.1-2001, \fI<signal.h>\fP
+.SH COPYRIGHT
+Portions of this text are reprinted and reproduced in electronic form
+from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
+-- Portable Operating System Interface (POSIX), The Open Group Base
+Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
+Electrical and Electronics Engineers, Inc and The Open Group. In the
+event of any discrepancy between this version and the original IEEE and
+The Open Group Standard, the original IEEE and The Open Group Standard
+is the referee document. The original Standard can be obtained online at
+http://www.opengroup.org/unix/online.html .