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<TITLE>setjmp</TITLE>
<body bgcolor="#ffffcc">
<hr>
<pre>
<h3>SETJMP(3) Library functions SETJMP(3)
</h3>
<h3>NAME
</h3> setjmp - save stack context for non-local goto
<h3>SYNOPSIS
</h3> #include <setjmp.h>
int setjmp(jmp_buf env );
<h3>DESCRIPTION
</h3> setjmp and longjmp(3) are useful for dealing with errors
and interrupts encountered in a low-level subroutine of a
program. setjmp() saves the stack context/environment in
env for later use by longjmp(). The stack context will be
invalidated if the function which called setjmp() returns.
<h3>RETURN VALUE
</h3> It returns the value 0 if returning directly and non-zero
when returning from longjmp() using the saved context.
<h3>CONFORMING TO
</h3> POSIX
<h3>NOTES
</h3> POSIX does not specify if the signal context will be saved
or not. If you want to save signal masks, use
sigsetjmp(3). setjmp() makes programs hard to understand
and maintain. If possible an alternative should be used.
</pre>
<hr>
<h3>SEE ALSO
</h3><p>
<a href=longjmp.htmlongjmp</a>,
<a href=sigsetjmp.htm>sigsetjmp</a>,
<a href=siglongjmp.htm>siglongjmp</a>,
<pre>
November 25, 1994 1
</pre>
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