void
cmdloop(int top)
{
union node *n;
struct stackmark smark;
int inter;
int numeof = 0;
enum skipstate skip;
TRACE(("cmdloop(%d) called\n", top));
setstackmark(&smark);
for (;;) {
if (pendingsigs)
dotrap();
inter = 0;
if (iflag == 1 && top) {
inter = 1;
showjobs(out2, SHOW_CHANGED);
chkmail(0);
flushout(&errout);
nflag = 0;
}
n = parsecmd(inter);
TRACE(("cmdloop: "); showtree(n));
/* showtree(n); DEBUG */
if (n == NEOF) {
if (!top || numeof >= 50)
break;
if (nflag)
break;
if (!stoppedjobs()) {
if (!iflag || !Iflag)
break;
out2str("\nUse \"exit\" to leave shell.\n");
}
numeof++;
} else if (n != NULL && nflag == 0) {
job_warning = (job_warning == 2) ? 1 : 0;
numeof = 0;
evaltree(n, EV_MORE);
}
popstackmark(&smark);
setstackmark(&smark);
/*
* Any SKIP* can occur here! SKIP(FUNC|BREAK|CONT) occur when
* a dotcmd is in a loop or a function body and appropriate
* built-ins occurs in file scope in the sourced file. Values
* other than SKIPFILE are reset by the appropriate eval*()
* that contained the dotcmd() call.
*/
skip = current_skipstate();
if (skip != SKIPNONE) {
if (skip == SKIPFILE)
stop_skipping();
break;
}
}
popstackmark(&smark);
}
void
dotrap(void)
{
int i;
char *tr;
int savestatus;
struct skipsave saveskip;
in_dotrap++;
CTRACE(DBG_TRAP, ("dotrap[%d]: %d pending, traps %sinvalid\n",
in_dotrap, pendingsigs, traps_invalid ? "" : "not "));
for (;;) {
pendingsigs = 0;
for (i = 1 ; ; i++) {
if (i >= NSIG)
return;
if (gotsig[i])
break;
}
gotsig[i] = 0;
if (traps_invalid)
continue;
tr = trap[i];
CTRACE(DBG_TRAP|DBG_SIG, ("dotrap %d: %s%s%s\n", i,
tr ? "\"" : "", tr ? tr : "NULL", tr ? "\"" : ""));
if (tr != NULL) {
last_trapsig = i;
save_skipstate(&saveskip);
savestatus = exitstatus;
tr = savestr(tr); /* trap code may free trap[i] */
evalstring(tr, 0);
ckfree(tr);
if (current_skipstate() == SKIPNONE ||
saveskip.state != SKIPNONE) {
restore_skipstate(&saveskip);
exitstatus = savestatus;
}
}
}
in_dotrap--;
}