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 returns in such a way that execution contin- ues as if the call of setjmp had just returned the value val to the function that invoked setjmp, which must not itself have returned in the interim. All accessible data have val- ues as of the time longjmp was called. SEE ALSO signal(2)