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PROLOG | NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLES | APPLICATION USAGE | RATIONALE | FUTURE DIRECTIONS | SEE ALSO | COPYRIGHT |
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SETJMP(3P) POSIX Programmer's Manual SETJMP(3P)
This manual page is part of the POSIX Programmer's Manual. The
Linux implementation of this interface may differ (consult the
corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.
setjmp — set jump point for a non-local goto
#include <setjmp.h>
int setjmp(jmp_buf env);
The functionality described on this reference page is aligned
with the ISO C standard. Any conflict between the requirements
described here and the ISO C standard is unintentional. This
volume of POSIX.1‐2017 defers to the ISO C standard.
A call to setjmp() shall save the calling environment in its env
argument for later use by longjmp().
It is unspecified whether setjmp() 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 setjmp, the behavior is undefined.
An application shall ensure that an invocation of setjmp()
appears in one of the following contexts only:
* The entire controlling expression of a selection or iteration
statement
* 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
* The operand of a unary '!' operator with the resulting
expression being the entire controlling expression of a
selection or iteration
* The entire expression of an expression statement (possibly
cast to void)
If the invocation appears in any other context, the behavior is
undefined.
If the return is from a direct invocation, setjmp() shall return
0. If the return is from a call to longjmp(), setjmp() shall
return a non-zero value.
No errors are defined.
The following sections are informative.
None.
In general, sigsetjmp() is more useful in dealing with errors and
interrupts encountered in a low-level subroutine of a program.
None.
None.
longjmp(3p), sigsetjmp(3p)
The Base Definitions volume of POSIX.1‐2017, setjmp.h(0p)
Portions of this text are reprinted and reproduced in electronic
form from IEEE Std 1003.1-2017, Standard for Information
Technology -- Portable Operating System Interface (POSIX), The
Open Group Base Specifications Issue 7, 2018 Edition, Copyright
(C) 2018 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 .
Any typographical or formatting errors that appear in this page
are most likely to have been introduced during the conversion of
the source files to man page format. To report such errors, see
https://www.kernel.org/doc/man-pages/reporting_bugs.html .
IEEE/The Open Group 2017 SETJMP(3P)
Pages that refer to this page: setjmp.h(0p), longjmp(3p), _longjmp(3p), siglongjmp(3p)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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