135 lines
3.4 KiB
C
135 lines
3.4 KiB
C
/*-
|
|
* Copyright (c) 2001 Dag-Erling Coïdan Smørgrav
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer
|
|
* in this position and unchanged.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/mutex.h>
|
|
#include <sys/pioctl.h>
|
|
#include <sys/proc.h>
|
|
#include <sys/signalvar.h>
|
|
#include <sys/systm.h>
|
|
|
|
#include <fs/pseudofs/pseudofs.h>
|
|
#include <fs/procfs/procfs.h>
|
|
|
|
/*
|
|
* Process ioctls
|
|
*/
|
|
int
|
|
procfs_ioctl(PFS_IOCTL_ARGS)
|
|
{
|
|
struct procfs_status *ps;
|
|
int error, flags, sig;
|
|
|
|
PROC_LOCK(p);
|
|
error = 0;
|
|
switch (cmd) {
|
|
case PIOCBIS:
|
|
p->p_stops |= *(unsigned int *)data;
|
|
break;
|
|
case PIOCBIC:
|
|
p->p_stops &= ~*(unsigned int *)data;
|
|
break;
|
|
case PIOCSFL:
|
|
flags = *(unsigned int *)data;
|
|
if (flags & PF_ISUGID && (error = suser(td->td_proc)) != 0)
|
|
break;
|
|
p->p_pfsflags = flags;
|
|
break;
|
|
case PIOCGFL:
|
|
*(unsigned int *)data = p->p_pfsflags;
|
|
break;
|
|
case PIOCWAIT:
|
|
while (p->p_step == 0) {
|
|
/* sleep until p stops */
|
|
error = msleep(&p->p_stype, &p->p_mtx,
|
|
PWAIT|PCATCH, "pioctl", 0);
|
|
if (error != 0)
|
|
break;
|
|
}
|
|
/* fall through to PIOCSTATUS */
|
|
case PIOCSTATUS:
|
|
ps = (struct procfs_status *)data;
|
|
ps->state = (p->p_step == 0);
|
|
ps->flags = 0; /* nope */
|
|
ps->events = p->p_stops;
|
|
ps->why = p->p_step ? p->p_stype : 0;
|
|
ps->val = p->p_step ? p->p_xstat : 0;
|
|
break;
|
|
case PIOCCONT:
|
|
if (p->p_step == 0)
|
|
break;
|
|
sig = *(int *)data;
|
|
if (sig != 0 && !_SIG_VALID(sig)) {
|
|
error = EINVAL;
|
|
break;
|
|
}
|
|
#if 0
|
|
mtx_lock_spin(&sched_lock);
|
|
p->p_step = 0;
|
|
if (p->p_stat == SSTOP) {
|
|
p->p_xstat = sig;
|
|
setrunnable(&p->p_thread);
|
|
mtx_unlock_spin(&sched_lock);
|
|
} else {
|
|
mtx_unlock_spin(&sched_lock);
|
|
if (sig)
|
|
psignal(p, sig);
|
|
}
|
|
#else
|
|
if (sig)
|
|
psignal(p, sig);
|
|
p->p_step = 0;
|
|
wakeup(&p->p_step);
|
|
#endif
|
|
break;
|
|
default:
|
|
error = (ENOTTY);
|
|
}
|
|
PROC_UNLOCK(p);
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Clean up on last close
|
|
*/
|
|
int
|
|
procfs_close(PFS_CLOSE_ARGS)
|
|
{
|
|
if (p != NULL && (p->p_pfsflags & PF_LINGER) == 0) {
|
|
p->p_pfsflags = 0;
|
|
p->p_stops = 0;
|
|
p->p_step = 0;
|
|
wakeup(&p->p_step);
|
|
}
|
|
return (0);
|
|
}
|