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+.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved 
+.TH "SETJMP" P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
+.\" setjmp 
+.SH NAME
+setjmp \- set jump point for a non-local goto
+.SH SYNOPSIS
+.LP
+\fB#include <setjmp.h>
+.br
+.sp
+int setjmp(jmp_buf\fP \fIenv\fP\fB);
+.br
+\fP
+.SH DESCRIPTION
+.LP
+A call to \fIsetjmp\fP() shall save the calling environment in its
+\fIenv\fP argument for later use by \fIlongjmp\fP().
+.LP
+It is unspecified whether \fIsetjmp\fP() is a macro or a function.
+If a macro definition is suppressed in order to access an
+actual function, or a program defines an external identifier with
+the name \fIsetjmp\fP, the behavior is undefined.
+.LP
+An application shall ensure that an invocation of \fIsetjmp\fP() appears
+in one of the following contexts only:
+.IP " *" 3
+The entire controlling expression of a selection or iteration statement
+.LP
+.IP " *" 3
+One operand of a relational or equality operator with the other operand
+an integral constant expression, with the resulting
+expression being the entire controlling expression of a selection
+or iteration statement
+.LP
+.IP " *" 3
+The operand of a unary \fB'!'\fP operator with the resulting expression
+being the entire controlling expression of a
+selection or iteration
+.LP
+.IP " *" 3
+The entire expression of an expression statement (possibly cast to
+\fBvoid\fP)
+.LP
+.LP
+If the invocation appears in any other context, the behavior is undefined.
+.SH RETURN VALUE
+.LP
+If the return is from a direct invocation, \fIsetjmp\fP() shall return
+0. If the return is from a call to \fIlongjmp\fP(), \fIsetjmp\fP()
+shall return a non-zero value.
+.SH ERRORS
+.LP
+No errors are defined.
+.LP
+\fIThe following sections are informative.\fP
+.SH EXAMPLES
+.LP
+None.
+.SH APPLICATION USAGE
+.LP
+In general, \fIsigsetjmp\fP() is more useful in dealing with errors
+and interrupts
+encountered in a low-level subroutine of a program.
+.SH RATIONALE
+.LP
+None.
+.SH FUTURE DIRECTIONS
+.LP
+None.
+.SH SEE ALSO
+.LP
+\fIlongjmp\fP() , \fIsigsetjmp\fP() , the Base Definitions volume
+of
+IEEE\ Std\ 1003.1-2001, \fI<setjmp.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 .