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< * $Id: kern_descrip.c,v 1.54 1998/07/15 06:10:16 bde Exp $
---
> * $Id: kern_descrip.c,v 1.55 1998/07/29 17:38:13 bde Exp $
73a74
> static MALLOC_DEFINE(M_SIGIO, "sigio", "sigio structures");
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< if (fp->f_type == DTYPE_SOCKET) {
< p->p_retval[0] = ((struct socket *)fp->f_data)->so_pgid;
< return (0);
< }
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< (fp, TIOCGPGRP, (caddr_t)p->p_retval, p);
< p->p_retval[0] = - p->p_retval[0];
---
> (fp, FIOGETOWN, (caddr_t)p->p_retval, p);
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< if (fp->f_type == DTYPE_SOCKET) {
< ((struct socket *)fp->f_data)->so_pgid = uap->arg;
< return (0);
< }
< if (uap->arg <= 0) {
< uap->arg = -uap->arg;
< } else {
< struct proc *p1 = pfind(uap->arg);
< if (p1 == 0)
< return (ESRCH);
< uap->arg = p1->p_pgrp->pg_id;
< }
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< (fp, TIOCSPGRP, (caddr_t)&uap->arg, p));
---
> (fp, FIOSETOWN, (caddr_t)&uap->arg, p));
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> * If sigio is on the list associated with a process or process group,
> * disable signalling from the device, remove sigio from the list and
> * free sigio.
> */
> void
> funsetown(sigio)
> struct sigio *sigio;
> {
> int s;
>
> if (sigio == NULL)
> return;
> s = splhigh();
> *(sigio->sio_myref) = NULL;
> splx(s);
> if (sigio->sio_pgid < 0) {
> SLIST_REMOVE(&sigio->sio_pgrp->pg_sigiolst, sigio,
> sigio, sio_pgsigio);
> } else /* if ((*sigiop)->sio_pgid > 0) */ {
> SLIST_REMOVE(&sigio->sio_proc->p_sigiolst, sigio,
> sigio, sio_pgsigio);
> }
> crfree(sigio->sio_ucred);
> FREE(sigio, M_SIGIO);
> }
>
> /* Free a list of sigio structures. */
> void
> funsetownlst(sigiolst)
> struct sigiolst *sigiolst;
> {
> struct sigio *sigio;
>
> while ((sigio = sigiolst->slh_first) != NULL)
> funsetown(sigio);
> }
>
> /*
> * This is common code for FIOSETOWN ioctl called by fcntl(fd, F_SETOWN, arg).
> *
> * After permission checking, add a sigio structure to the sigio list for
> * the process or process group.
> */
> int
> fsetown(pgid, sigiop)
> pid_t pgid;
> struct sigio **sigiop;
> {
> struct proc *proc = NULL;
> struct pgrp *pgrp = NULL;
> struct sigio *sigio;
> int s;
>
> if (pgid == 0) {
> funsetown(*sigiop);
> return (0);
> } else if (pgid > 0) {
> proc = pfind(pgid);
> if (proc == NULL)
> return (ESRCH);
> /*
> * Policy - Don't allow a process to FSETOWN a process
> * in another session.
> *
> * Remove this test to allow maximum flexibility or
> * restrict FSETOWN to the current process or process
> * group for maximum safety.
> */
> else if (proc->p_session != curproc->p_session)
> return (EPERM);
> } else /* if (pgid < 0) */ {
> pgrp = pgfind(-pgid);
> if (pgrp == NULL)
> return (ESRCH);
> /*
> * Policy - Don't allow a process to FSETOWN a process
> * in another session.
> *
> * Remove this test to allow maximum flexibility or
> * restrict FSETOWN to the current process or process
> * group for maximum safety.
> */
> else if (pgrp->pg_session != curproc->p_session)
> return (EPERM);
> }
> funsetown(*sigiop);
> MALLOC(sigio, struct sigio *, sizeof(struct sigio), M_SIGIO,
> M_WAITOK);
> if (pgid > 0) {
> SLIST_INSERT_HEAD(&proc->p_sigiolst, sigio, sio_pgsigio);
> sigio->sio_proc = proc;
> } else {
> SLIST_INSERT_HEAD(&pgrp->pg_sigiolst, sigio, sio_pgsigio);
> sigio->sio_pgrp = pgrp;
> }
> sigio->sio_pgid = pgid;
> crhold(curproc->p_ucred);
> sigio->sio_ucred = curproc->p_ucred;
> /* It would be convenient if p_ruid was in ucred. */
> sigio->sio_ruid = curproc->p_cred->p_ruid;
> sigio->sio_myref = sigiop;
> s = splhigh();
> *sigiop = sigio;
> splx(s);
> return (0);
> }
>
> /*
> * This is common code for FIOGETOWN ioctl called by fcntl(fd, F_GETOWN, arg).
> */
> pid_t
> fgetown(sigio)
> struct sigio *sigio;
> {
> return (sigio != NULL ? sigio->sio_pgid : 0);
> }
>
> /*