setjmp(3p) [centos man page]

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

PROLOG

       This  manual page is part of the POSIX Programmer's Manual.  The Linux implementation of this interface may differ (consult the correspond-
       ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.

NAME

       setjmp - set jump point for a non-local goto

SYNOPSIS

       #include <setjmp.h>

       int setjmp(jmp_buf env);

DESCRIPTION

       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.

RETURN VALUE

       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.

ERRORS

       No errors are defined.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

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

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       longjmp(), sigsetjmp(), the Base Definitions volume of IEEE Std 1003.1-2001, <setjmp.h>

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Standard for Information Technol-
       ogy -- 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 .

IEEE
/The Open Group						       2003								SETJMP(3P)

Check Out this Related Man Page

SIGLONGJMP(3P)						     POSIX Programmer's Manual						    SIGLONGJMP(3P)

PROLOG

       This  manual page is part of the POSIX Programmer's Manual.  The Linux implementation of this interface may differ (consult the correspond-
       ing Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.

NAME

       siglongjmp -- non-local goto with signal handling

SYNOPSIS

       #include <setjmp.h>

       void siglongjmp(sigjmp_buf env, int val);

DESCRIPTION

       The siglongjmp() function shall be equivalent to the longjmp() function, except as follows:

	*  References to setjmp() shall be equivalent to sigsetjmp().

	*  The siglongjmp() function shall restore the saved signal mask if and only if the env argument was initialized by a call to  sigsetjmp()
	   with a non-zero savemask argument.

RETURN VALUE

       After  siglongjmp()  is completed, program execution shall continue as if the corresponding invocation of sigsetjmp() had just returned the
       value specified by val.	The siglongjmp() function shall not cause sigsetjmp() to return 0; if val is 0, sigsetjmp() shall return the value
       1.

ERRORS

       No errors are defined.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       The  distinction between setjmp() or longjmp() and sigsetjmp() or siglongjmp() is only significant for programs which use sigaction(), sig-
       procmask(), or sigsuspend().

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       longjmp(), pthread_sigmask(), setjmp(), sigsetjmp(), sigsuspend()

       The Base Definitions volume of POSIX.1-2008, <setjmp.h>

COPYRIGHT

       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2013 Edition, Standard for Information Technol-
       ogy  --	Portable  Operating  System  Interface (POSIX), The Open Group Base Specifications Issue 7, Copyright (C) 2013 by the Institute of
       Electrical and Electronics Engineers, Inc and The Open Group.  (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) 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 Stan-
       dard is the referee document. The original Standard can be obtained online at http://www.unix.org/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						       2013							    SIGLONGJMP(3P)

Linux and UNIX Man Pages

setjmp(3p) [centos man page]

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