siginterrupt(2)						       siginterrupt(2)

NAME    [Toc]    [Back]

     siginterrupt - allow signals to interrupt functions (X/Open XPG4)

SYNOPSIS    [Toc]    [Back]

     #include <signal.h>

     int siginterrupt(int sig, int flag);

DESCRIPTION    [Toc]    [Back]

     The siginterrupt()	function is used to change the restart behaviour when
     a function	is interrupted by the specified	signal.	 The function
     siginterrupt(sig, flag) has an effect as if implemented as:

     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;
     };

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

SEE ALSO    [Toc]    [Back]

     sigaction(2).

DIAGNOSTICS    [Toc]    [Back]

     A 0 value indicates that the call succeeded.  A -1	return value indicates
     an	error occurred and errno is set	to indicate the	reason.


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