2 * Copyright (c) 2001 Dag-Erling Coïdan Smørgrav
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer
10 * in this position and unchanged.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 #include "opt_compat.h"
33 #include <sys/param.h>
35 #include <sys/mutex.h>
36 #include <sys/pioctl.h>
39 #include <sys/signalvar.h>
40 #include <sys/systm.h>
42 #include <fs/pseudofs/pseudofs.h>
43 #include <fs/procfs/procfs.h>
46 struct procfs_status32 {
47 int state; /* Running, stopped, something else? */
48 int flags; /* Any flags */
49 unsigned int events; /* Events to stop on */
50 int why; /* What event, if any, proc stopped on */
51 unsigned int val; /* Any extra data */
54 #define PIOCWAIT32 _IOR('p', 4, struct procfs_status32)
55 #define PIOCSTATUS32 _IOR('p', 6, struct procfs_status32)
62 procfs_ioctl(PFS_IOCTL_ARGS)
64 struct procfs_status *ps;
66 struct procfs_status32 *ps32;
68 int error, flags, sig;
69 #ifdef COMPAT_FREEBSD6
76 #if defined(COMPAT_FREEBSD5) || defined(COMPAT_FREEBSD4) || defined(COMPAT_43)
77 case _IOC(IOC_IN, 'p', 1, 0):
79 #ifdef COMPAT_FREEBSD6
81 ival = IOCPARM_IVAL(data);
85 p->p_stops |= *(unsigned int *)data;
87 #if defined(COMPAT_FREEBSD5) || defined(COMPAT_FREEBSD4) || defined(COMPAT_43)
88 case _IOC(IOC_IN, 'p', 2, 0):
90 #ifdef COMPAT_FREEBSD6
92 ival = IOCPARM_IVAL(data);
96 p->p_stops &= ~*(unsigned int *)data;
98 #if defined(COMPAT_FREEBSD5) || defined(COMPAT_FREEBSD4) || defined(COMPAT_43)
99 case _IOC(IOC_IN, 'p', 3, 0):
101 #ifdef COMPAT_FREEBSD6
103 ival = IOCPARM_IVAL(data);
107 flags = *(unsigned int *)data;
108 if (flags & PF_ISUGID) {
110 * XXXRW: Is this specific check required here, as
111 * p_candebug() should implement it, or other checks
114 error = priv_check_cred(td->td_ucred,
115 PRIV_DEBUG_SUGID, SUSER_ALLOWJAIL);
119 p->p_pfsflags = flags;
122 *(unsigned int *)data = p->p_pfsflags;
125 while (p->p_step == 0 && (p->p_flag & P_WEXIT) == 0) {
126 /* sleep until p stops */
127 error = msleep(&p->p_stype, &p->p_mtx,
128 PWAIT|PCATCH, "pioctl", 0);
132 /* fall through to PIOCSTATUS */
134 ps = (struct procfs_status *)data;
135 ps->state = (p->p_step == 0);
136 ps->flags = 0; /* nope */
137 ps->events = p->p_stops;
138 ps->why = p->p_step ? p->p_stype : 0;
139 ps->val = p->p_step ? p->p_xstat : 0;
143 while (p->p_step == 0 && (p->p_flag & P_WEXIT) == 0) {
144 /* sleep until p stops */
145 error = msleep(&p->p_stype, &p->p_mtx,
146 PWAIT|PCATCH, "pioctl", 0);
150 /* fall through to PIOCSTATUS32 */
152 ps32 = (struct procfs_status32 *)data;
153 ps32->state = (p->p_step == 0);
154 ps32->flags = 0; /* nope */
155 ps32->events = p->p_stops;
156 ps32->why = p->p_step ? p->p_stype : 0;
157 ps32->val = p->p_step ? p->p_xstat : 0;
160 #if defined(COMPAT_FREEBSD5) || defined(COMPAT_FREEBSD4) || defined(COMPAT_43)
161 case _IOC(IOC_IN, 'p', 5, 0):
163 #ifdef COMPAT_FREEBSD6
165 ival = IOCPARM_IVAL(data);
171 sig = *(unsigned int *)data;
172 if (sig != 0 && !_SIG_VALID(sig)) {
178 if (P_SHOULDSTOP(p)) {
180 p->p_flag &= ~(P_STOPPED_TRACE|P_STOPPED_SIG);
181 mtx_lock_spin(&sched_lock);
183 mtx_unlock_spin(&sched_lock);
202 * Clean up on last close
205 procfs_close(PFS_CLOSE_ARGS)
207 if (p != NULL && (p->p_pfsflags & PF_LINGER) == 0) {
208 PROC_LOCK_ASSERT(p, MA_OWNED);