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<TITLE>longjmp</TITLE>
<body bgcolor="#ffffcc">
<hr>
<pre>
<h3>LONGJMP(3) Library functions LONGJMP(3)
</h3>
<h3>NAME
</h3> longjmp - non-local jump to a saved stack context
<h3>SYNOPSIS
</h3> #include <setjmp.h>
void longjmp(jmp_buf env, int val);
<h3>DESCRIPTION
</h3> longjmp() and setjmp(3) are useful for dealing with errors
and interrupts encountered in a low-level subroutine of a
program. longjmp() restores the environment saved by the
last call of setjmp() with the corresponding env argument.
After longjmp() is completed, program execution continues
as if the corresponding call of setjmp() had just returned
the value val. longjmp() cannot cause 0 to be returned.
If longjmp is invoked with a second argument of 0, 1 will
be returned instead.
<h3>RETURN VALUE
</h3> This function never returns.
<h3>CONFORMING TO
</h3> POSIX
<h3>NOTES
</h3> POSIX does not specify if the signal context will be
restored or not. If you want to save restore signal
masks, use siglongjmp(3) longjmp() makes programs hard to
understand and maintain. If possible an alternative
should be used.
</pre>
<hr>
<h3>SEE ALSO
</h3><p>
<a href=setjmp.htm>setjmp</a>,
<a href=sigsetjmp.htm>sigsetjmp</a>,
<a href=siglongjmp.htm>siglongjmp</a>,
<pre>
November 25, 1994 1
</pre>
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