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Linux 2.6 - man page for pause (linux section 3posix)

PAUSE(P)			    POSIX Programmer's Manual				 PAUSE(P)

NAME
       pause - suspend the thread until a signal is received

SYNOPSIS
       #include <unistd.h>

       int pause(void);

DESCRIPTION
       The  pause()  function  shall  suspend the calling thread until delivery of a signal whose
       action is either to execute a signal-catching function or to terminate the process.

       If the action is to terminate the process, pause() shall not return.

       If the action is to execute a signal-catching function, pause()	shall  return  after  the
       signal-catching function returns.

RETURN VALUE
       Since pause() suspends thread execution indefinitely unless interrupted by a signal, there
       is no successful completion return value. A value of -1 shall be returned and errno set to
       indicate the error.

ERRORS
       The pause() function shall fail if:

       EINTR  A  signal is caught by the calling process and control is returned from the signal-
	      catching function.

       The following sections are informative.

EXAMPLES
       None.

APPLICATION USAGE
       Many common uses of pause() have timing windows. The scenario involves checking	a  condi-
       tion  related  to  a signal and, if the signal has not occurred, calling pause(). When the
       signal occurs between the check and the call to pause(), the process often blocks  indefi-
       nitely.	The  sigprocmask()  and  sigsuspend() functions can be used to avoid this type of
       problem.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       sigsuspend() , the Base Definitions volume of IEEE Std 1003.1-2001, <unistd.h>

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 orig-
       inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group			       2003					 PAUSE(P)


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