/* note: i MUST NOT be 0 */
void
unwind(int i)
{
/*
* This is a kludge. We need to restore everything that was
* changed in the new environment, see cid 1005090337C7A669439
* and 10050903386452ACBF1, but fail to even save things most of
* the time. funcs.c:c_eval() changes FERREXIT temporarily to 0,
* which needs to be restored thus (related to Debian #696823).
* We did not save the shell flags, so we use a special or'd
* value here... this is mostly to clean up behind *other*
* callers of unwind(LERROR) here; exec.c has the regular case.
*/
if (Flag(FERREXIT) & 0x80) {
/* GNU bash does not run this trapsig */
trapsig(ksh_SIGERR);
Flag(FERREXIT) &= ~0x80;
}
/* ordering for EXIT vs ERR is a bit odd (this is what AT&T ksh does) */
if (i == LEXIT || ((i == LERROR || i == LINTR) &&
sigtraps[ksh_SIGEXIT].trap &&
(!Flag(FTALKING) || Flag(FERREXIT)))) {
++trap_nested;
runtrap(&sigtraps[ksh_SIGEXIT], trap_nested == 1);
--trap_nested;
i = LLEAVE;
} else if (Flag(FERREXIT) == 1 && (i == LERROR || i == LINTR)) {
++trap_nested;
runtrap(&sigtraps[ksh_SIGERR], trap_nested == 1);
--trap_nested;
i = LLEAVE;
}
while (/* CONSTCOND */ 1) {
switch (e->type) {
case E_PARSE:
case E_FUNC:
case E_INCL:
case E_LOOP:
case E_ERRH:
kshlongjmp(e->jbuf, i);
/* NOTREACHED */
case E_NONE:
if (i == LINTR)
e->flags |= EF_FAKE_SIGDIE;
/* FALLTHROUGH */
default:
quitenv(NULL);
/*
* quitenv() may have reclaimed the memory
* used by source which will end badly when
* we jump to a function that expects it to
* be valid
*/
source = NULL;
}
}
}
/*
* run any pending traps. If intr is set, only run traps that
* can interrupt commands.
*/
void
runtraps(int flag)
{
int i;
Trap *p;
if (ksh_tmout_state == TMOUT_LEAVING) {
ksh_tmout_state = TMOUT_EXECUTING;
warningf(false, "timed out waiting for input");
unwind(LEXIT);
} else
/* XXX: this means the alarm will have no effect if a trap
* is caught after the alarm() was started...not good.
*/
ksh_tmout_state = TMOUT_EXECUTING;
if (!flag)
trap = 0;
if (flag & TF_DFL_INTR)
intrsig = 0;
if (flag & TF_FATAL)
fatal_trap = 0;
for (p = sigtraps, i = NSIG+1; --i >= 0; p++)
if (p->set && (!flag ||
((p->flags & flag) && p->trap == (char *) 0)))
runtrap(p);
}
