SETJMP(3) SETJMP(3)
NAME
setjmp, longjmp - non-local goto
SYNOPSIS
#include <setjmp.h>
setjmp(env)
jmp_buf env;
longjmp(env, val)
jmp_buf env;
DESCRIPTION
These routines are useful for dealing with errors and inter-
rupts encountered in a low-level subroutine of a program.
Setjmp saves its stack environment in env for later use by
longjmp. It returns value 0.
Longjmp restores the environment saved by the last call of
setjmp. It then causes execution to continue as if the call
of setjmp had just returned with value val. The invoker of
setjmp must not itself have returned in the interim. All
accessible data have values as of the time longjmp was
called.
SEE ALSO
signal(2)