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setjmp(3p) — Linux manual page

SETJMP(3P)              POSIX Programmer's ManualSETJMP(3P)

PROLOG        top

       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.

NAME        top

       setjmp — set jump point for a non-local goto

SYNOPSIS        top

       #include <setjmp.h>       int setjmp(jmp_bufenv);

DESCRIPTION        top

       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 tosetjmp() shall save the calling environment in itsenv       argument for later use bylongjmp().       It is unspecified whethersetjmp() 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       namesetjmp, the behavior is undefined.       An application shall ensure that an invocation ofsetjmp() 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 tovoid)       If the invocation appears in any other context, the behavior is       undefined.

RETURN VALUE        top

       If the return is from a direct invocation,setjmp() shall return       0. If the return is from a call tolongjmp(),setjmp() shall       return a non-zero value.

ERRORS        top

       No errors are defined.The following sections are informative.

EXAMPLES        top

       None.

APPLICATION USAGE        top

       In general,sigsetjmp() is more useful in dealing with errors and       interrupts encountered in a low-level subroutine of a program.

RATIONALE        top

       None.

FUTURE DIRECTIONS        top

       None.

SEE ALSO        top

longjmp(3p),sigsetjmp(3p)       The Base Definitions volume of POSIX.1‐2017,setjmp.h(0p)

COPYRIGHT        top

       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 athttp://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, seehttps://www.kernel.org/doc/man-pages/reporting_bugs.html .IEEE/The Open Group                2017SETJMP(3P)

Pages that refer to this page:setjmp.h(0p), longjmp(3p), _longjmp(3p), siglongjmp(3p)

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