NAME
	  sigsetjmp - Sets jump	point for a nonlocal goto

     LIBRARY
	  Standard C Library (libc.a)

     SYNOPSIS
	  #include <setjmp.h>
	  int sigsetjmp	(
	       sigjmp_buf env,
	       int savemask );

     PARAMETERS
	  env  Specifies an address for	a sigjmp_buf structure.

	  savemask
	       Specifies whether the current signal mask should	be
	       saved.

     DESCRIPTION
	  The sigsetjmp() function saves its calling environment in
	  its env parameter for	later use by the siglongjmp() func-
	  tion.

	  If the value of the savemask parameter is not	0 (zero) the
	  sigsetjmp() function will also save the process' current
	  signal mask as part of the calling environment.


     CAUTION
	  If automatic and register variables are changed after	the
	  sigsetjmp(), their values are	indeterminate after the	.nh
	  siglongjmp().	 You cannot assume that	these variables	are
	  restored to what they	were when the .nh sigsetjmp() was
	  called. Nor can you assume that they are set to whatever
	  value	they had when the function sequence containing the .nh
	  siglongjmp() was started.


	  If you want them to retain the values	they had when the
	  function sequence containing the .nh siglongjmp() is
	  started, declare them	as volatile.


     NOTES
	  AES Support Level: Full use

     RETURN VALUES
	  If the return	is from	a successful direct invocation,	the
	  sigsetjmp() function returns the value 0 (zero).  If the
	  return is from a call	to the siglongjmp() function, the sig-
	  setjmp() function returns a nonzero value.
     RELATED INFORMATION
	  Functions: sigaction(2), siglongjmp(3), sigprocmask(2),
	  sigsuspend(2)