int
procfs_doctl(struct proc *curp, struct lwp *lp, struct pfsnode *pfs,
struct uio *uio)
{
struct proc *p = lp->lwp_proc;
int xlen;
int error;
char msg[PROCFS_CTLLEN+1];
vfs_namemap_t *nm;
ASSERT_LWKT_TOKEN_HELD(&p->p_token);
ASSERT_LWKT_TOKEN_HELD(&proc_token);
if (uio->uio_rw != UIO_WRITE)
return (EOPNOTSUPP);
xlen = PROCFS_CTLLEN;
error = vfs_getuserstr(uio, msg, &xlen);
if (error)
return (error);
/*
* Map signal names into signal generation
* or debug control. Unknown commands and/or signals
* return EOPNOTSUPP.
*
* Sending a signal while the process is being debugged
* also has the side effect of letting the target continue
* to run. There is no way to single-step a signal delivery.
*/
error = EOPNOTSUPP;
nm = vfs_findname(ctlnames, msg, xlen);
if (nm) {
error = procfs_control(curp, lp, nm->nm_val);
} else {
nm = vfs_findname(signames, msg, xlen);
if (nm) {
if (TRACE_WAIT_P(curp, p)) {
p->p_xstat = nm->nm_val;
#ifdef FIX_SSTEP
FIX_SSTEP(lp);
#endif
/*
* Make the process runnable but do not
* break its tsleep.
*/
proc_unstop(p);
} else {
ksignal(p, nm->nm_val);
}
error = 0;
}
}
return (error);
}
int
procfs_donote(struct proc *curp, struct lwp *lp, struct pfsnode *pfs,
struct uio *uio)
{
int xlen;
int error;
char note[PROCFS_NOTELEN+1];
if (uio->uio_rw != UIO_WRITE)
return (EINVAL);
xlen = PROCFS_NOTELEN;
error = vfs_getuserstr(uio, note, &xlen);
if (error)
return (error);
/* send to process's notify function */
return (EOPNOTSUPP);
}
