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#include <signal.h>
#include <sys/ioctl.h>
#include "10.h"
stop(j)
JOB *j;
{
/*
* If the job is already stopped, we don't
* need to do anything.
*/
if (j->status & JSTOPPED)
return;
/*
* If the job's process group is not that of the
* terminal, then the job is in the background
* and must be sent a stop signal.
*/
if (j->pgrp != TermPgrp)
killpg(j->pgrp, SIGSTOP);
/*
* Mark the job as stopped.
*/
j->status |= JSTOPPED;
/*
* If the terminal is not in the shell's process
* group, we need to put it there.
*/
if (TermPgrp != MyPgrp) {
ioctl(1, TIOCSPGRP, &MyPgrp);
TermPgrp = MyPgrp;
}
}
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