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

NAME
       siginterrupt - allow signals to interrupt functions

SYNOPSIS
       #include <signal.h>

       int siginterrupt(int sig, int flag);

DESCRIPTION
       The  siginterrupt()  function  shall change the restart behavior when a function is inter-
       rupted by the specified signal. The function siginterrupt(sig, flag) has an effect  as  if
       implemented as:

	      int siginterrupt(int sig, int flag) {
		  int ret;
		  struct sigaction act;

		  (void) sigaction(sig, NULL, &act);
		  if (flag)
		      act.sa_flags &= ~SA_RESTART;
		  else
		      act.sa_flags |= SA_RESTART;
		  ret = sigaction(sig, &act, NULL);
		  return ret;
	      }

RETURN VALUE
       Upon successful completion, siginterrupt() shall return 0; otherwise, -1 shall be returned
       and errno set to indicate the error.

ERRORS
       The siginterrupt() function shall fail if:

       EINVAL The sig argument is not a valid signal number.

       The following sections are informative.

EXAMPLES
       None.

APPLICATION USAGE
       The siginterrupt() function supports programs written to historical system  interfaces.	A
       conforming  application,  when being written or rewritten, should use sigaction() with the
       SA_RESTART flag instead of siginterrupt().

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       Signal Concepts , sigaction() , the Base Definitions volume of IEEE Std 1003.1-2001, <sig-
       nal.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				  SIGINTERRUPT(P)
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