void
execwait(void)
{
switch(count(runq->argv->words)){
default:
Xerror1("Usage: wait [pid]");
return;
case 2:
Waitfor(atoi(runq->argv->words->next->word), 0);
break;
case 1:
Waitfor(-1, 0);
break;
}
poplist();
}
void
Xsimple(void)
{
word *a;
thread *p = runq;
var *v;
struct builtin *bp;
int pid;
globlist();
a = runq->argv->words;
if(a==0){
Xerror1("empty argument list");
return;
}
if(flag['x'])
pfmt(err, "%v\n", p->argv->words); /* wrong, should do redirs */
v = gvlook(a->word);
if(v->fn)
execfunc(v);
else{
if(strcmp(a->word, "builtin")==0){
if(count(a)==1){
pfmt(err, "builtin: empty argument list\n");
setstatus("empty arg list");
poplist();
return;
}
a = a->next;
popword();
}
for(bp = Builtin;bp->name;bp++)
if(strcmp(a->word, bp->name)==0){
(*bp->fnc)();
return;
}
if(exitnext()){
/* fork and wait is redundant */
pushword("exec");
execexec();
Xexit();
}
else{
flush(err);
Updenv(); /* necessary so changes don't go out again */
if((pid = execforkexec()) < 0){
Xerror("try again");
return;
}
/* interrupts don't get us out */
poplist();
while(Waitfor(pid, 1) < 0)
;
}
}
}
void
Xpipewait(void)
{
char status[NSTATUS+1];
if(runq->pid==-1)
setstatus(concstatus(runq->status, getstatus()));
else{
strncpy(status, getstatus(), NSTATUS);
status[NSTATUS]='\0';
Waitfor(runq->pid, 1);
runq->pid=-1;
setstatus(concstatus(getstatus(), status));
}
}
