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