4 * Copyright (c) 1982, 1986, 1989, 1991, 1993
5 * The Regents of the University of California. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by the University of
18 * California, Berkeley and its contributors.
19 * 4. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * @(#)kern_proc.c 8.7 (Berkeley) 2/14/95
36 * $FreeBSD: src/sys/kern/kern_proc.c,v 1.63.2.9 2003/05/08 07:47:16 kbyanc Exp $
37 * $DragonFly: src/sys/kern/kern_proc.c,v 1.45 2008/06/12 23:25:02 dillon Exp $
40 #include <sys/param.h>
41 #include <sys/systm.h>
42 #include <sys/kernel.h>
43 #include <sys/sysctl.h>
44 #include <sys/malloc.h>
47 #include <sys/filedesc.h>
49 #include <sys/dsched.h>
50 #include <sys/signalvar.h>
51 #include <sys/spinlock.h>
55 #include <vm/vm_map.h>
57 #include <machine/smp.h>
59 #include <sys/spinlock2.h>
60 #include <sys/mplock2.h>
62 static MALLOC_DEFINE(M_PGRP
, "pgrp", "process group header");
63 MALLOC_DEFINE(M_SESSION
, "session", "session header");
64 MALLOC_DEFINE(M_PROC
, "proc", "Proc structures");
65 MALLOC_DEFINE(M_LWP
, "lwp", "lwp structures");
66 MALLOC_DEFINE(M_SUBPROC
, "subproc", "Proc sub-structures");
68 int ps_showallprocs
= 1;
69 static int ps_showallthreads
= 1;
70 SYSCTL_INT(_security
, OID_AUTO
, ps_showallprocs
, CTLFLAG_RW
,
72 "Unprivileged processes can see proccesses with different UID/GID");
73 SYSCTL_INT(_security
, OID_AUTO
, ps_showallthreads
, CTLFLAG_RW
,
74 &ps_showallthreads
, 0,
75 "Unprivileged processes can see kernel threads");
77 static void pgdelete(struct pgrp
*);
78 static void orphanpg(struct pgrp
*pg
);
79 static pid_t
proc_getnewpid_locked(int random_offset
);
84 struct pidhashhead
*pidhashtbl
;
86 struct pgrphashhead
*pgrphashtbl
;
88 struct proclist allproc
;
89 struct proclist zombproc
;
92 * Random component to nextpid generation. We mix in a random factor to make
93 * it a little harder to predict. We sanity check the modulus value to avoid
94 * doing it in critical paths. Don't let it be too small or we pointlessly
95 * waste randomness entropy, and don't let it be impossibly large. Using a
96 * modulus that is too big causes a LOT more process table scans and slows
97 * down fork processing as the pidchecked caching is defeated.
99 static int randompid
= 0;
105 sysctl_kern_randompid(SYSCTL_HANDLER_ARGS
)
110 error
= sysctl_handle_int(oidp
, &pid
, 0, req
);
111 if (error
|| !req
->newptr
)
113 if (pid
< 0 || pid
> PID_MAX
- 100) /* out of range */
115 else if (pid
< 2) /* NOP */
117 else if (pid
< 100) /* Make it reasonable */
123 SYSCTL_PROC(_kern
, OID_AUTO
, randompid
, CTLTYPE_INT
|CTLFLAG_RW
,
124 0, 0, sysctl_kern_randompid
, "I", "Random PID modulus");
127 * Initialize global process hashing structures.
129 * Called from the low level boot code only.
135 LIST_INIT(&zombproc
);
137 pidhashtbl
= hashinit(maxproc
/ 4, M_PROC
, &pidhash
);
138 pgrphashtbl
= hashinit(maxproc
/ 4, M_PROC
, &pgrphash
);
143 * Is p an inferior of the current process?
146 * The caller must hold proc_token if the caller wishes a stable result.
149 inferior(struct proc
*p
)
151 lwkt_gettoken(&proc_token
);
152 while (p
!= curproc
) {
154 lwkt_reltoken(&proc_token
);
159 lwkt_reltoken(&proc_token
);
164 * Locate a process by number
166 * XXX TODO - change API to PHOLD() the returned process ?
169 * The caller must hold proc_token if the caller wishes a stable result.
176 lwkt_gettoken(&proc_token
);
177 LIST_FOREACH(p
, PIDHASH(pid
), p_hash
) {
178 if (p
->p_pid
== pid
) {
179 lwkt_reltoken(&proc_token
);
183 lwkt_reltoken(&proc_token
);
188 * Locate a process group by number
191 * The caller must hold proc_token if the caller wishes a stable result.
198 lwkt_gettoken(&proc_token
);
199 LIST_FOREACH(pgrp
, PGRPHASH(pgid
), pg_hash
) {
200 if (pgrp
->pg_id
== pgid
) {
201 lwkt_reltoken(&proc_token
);
205 lwkt_reltoken(&proc_token
);
210 * Move p to a new or existing process group (and session)
215 enterpgrp(struct proc
*p
, pid_t pgid
, int mksess
)
220 lwkt_gettoken(&proc_token
);
223 KASSERT(pgrp
== NULL
|| !mksess
,
224 ("enterpgrp: setsid into non-empty pgrp"));
225 KASSERT(!SESS_LEADER(p
),
226 ("enterpgrp: session leader attempted setpgrp"));
229 pid_t savepid
= p
->p_pid
;
234 KASSERT(p
->p_pid
== pgid
,
235 ("enterpgrp: new pgrp and pid != pgid"));
236 if ((np
= pfind(savepid
)) == NULL
|| np
!= p
) {
240 MALLOC(pgrp
, struct pgrp
*, sizeof(struct pgrp
),
243 struct session
*sess
;
248 MALLOC(sess
, struct session
*, sizeof(struct session
),
249 M_SESSION
, M_WAITOK
);
251 sess
->s_sid
= p
->p_pid
;
253 sess
->s_ttyvp
= NULL
;
255 bcopy(p
->p_session
->s_login
, sess
->s_login
,
256 sizeof(sess
->s_login
));
257 p
->p_flag
&= ~P_CONTROLT
;
258 pgrp
->pg_session
= sess
;
259 KASSERT(p
== curproc
,
260 ("enterpgrp: mksession and p != curproc"));
262 pgrp
->pg_session
= p
->p_session
;
263 sess_hold(pgrp
->pg_session
);
266 LIST_INIT(&pgrp
->pg_members
);
267 LIST_INSERT_HEAD(PGRPHASH(pgid
), pgrp
, pg_hash
);
269 SLIST_INIT(&pgrp
->pg_sigiolst
);
270 lockinit(&pgrp
->pg_lock
, "pgwt", 0, 0);
271 } else if (pgrp
== p
->p_pgrp
) {
276 * Adjust eligibility of affected pgrps to participate in job control.
277 * Increment eligibility counts before decrementing, otherwise we
278 * could reach 0 spuriously during the first call.
281 fixjobc(p
, p
->p_pgrp
, 0);
283 LIST_REMOVE(p
, p_pglist
);
284 if (LIST_EMPTY(&p
->p_pgrp
->pg_members
))
287 LIST_INSERT_HEAD(&pgrp
->pg_members
, p
, p_pglist
);
291 lwkt_reltoken(&proc_token
);
296 * Remove process from process group
301 leavepgrp(struct proc
*p
)
303 lwkt_gettoken(&proc_token
);
304 LIST_REMOVE(p
, p_pglist
);
305 if (LIST_EMPTY(&p
->p_pgrp
->pg_members
))
308 lwkt_reltoken(&proc_token
);
313 * Delete a process group
315 * The caller must hold proc_token.
318 pgdelete(struct pgrp
*pgrp
)
321 * Reset any sigio structures pointing to us as a result of
322 * F_SETOWN with our pgid.
324 funsetownlst(&pgrp
->pg_sigiolst
);
326 if (pgrp
->pg_session
->s_ttyp
!= NULL
&&
327 pgrp
->pg_session
->s_ttyp
->t_pgrp
== pgrp
)
328 pgrp
->pg_session
->s_ttyp
->t_pgrp
= NULL
;
329 LIST_REMOVE(pgrp
, pg_hash
);
330 sess_rele(pgrp
->pg_session
);
335 * Adjust the ref count on a session structure. When the ref count falls to
336 * zero the tty is disassociated from the session and the session structure
337 * is freed. Note that tty assocation is not itself ref-counted.
342 sess_hold(struct session
*sp
)
344 lwkt_gettoken(&tty_token
);
346 lwkt_reltoken(&tty_token
);
353 sess_rele(struct session
*sp
)
357 KKASSERT(sp
->s_count
> 0);
358 lwkt_gettoken(&tty_token
);
359 if (--sp
->s_count
== 0) {
360 if (sp
->s_ttyp
&& sp
->s_ttyp
->t_session
) {
361 #ifdef TTY_DO_FULL_CLOSE
362 /* FULL CLOSE, see ttyclearsession() */
363 KKASSERT(sp
->s_ttyp
->t_session
== sp
);
364 sp
->s_ttyp
->t_session
= NULL
;
366 /* HALF CLOSE, see ttyclearsession() */
367 if (sp
->s_ttyp
->t_session
== sp
)
368 sp
->s_ttyp
->t_session
= NULL
;
371 if ((tp
= sp
->s_ttyp
) != NULL
) {
375 kfree(sp
, M_SESSION
);
377 lwkt_reltoken(&tty_token
);
381 * Adjust pgrp jobc counters when specified process changes process group.
382 * We count the number of processes in each process group that "qualify"
383 * the group for terminal job control (those with a parent in a different
384 * process group of the same session). If that count reaches zero, the
385 * process group becomes orphaned. Check both the specified process'
386 * process group and that of its children.
387 * entering == 0 => p is leaving specified group.
388 * entering == 1 => p is entering specified group.
393 fixjobc(struct proc
*p
, struct pgrp
*pgrp
, int entering
)
395 struct pgrp
*hispgrp
;
396 struct session
*mysession
;
399 * Check p's parent to see whether p qualifies its own process
400 * group; if so, adjust count for p's process group.
402 lwkt_gettoken(&proc_token
);
403 mysession
= pgrp
->pg_session
;
404 if ((hispgrp
= p
->p_pptr
->p_pgrp
) != pgrp
&&
405 hispgrp
->pg_session
== mysession
) {
408 else if (--pgrp
->pg_jobc
== 0)
413 * Check this process' children to see whether they qualify
414 * their process groups; if so, adjust counts for children's
417 LIST_FOREACH(p
, &p
->p_children
, p_sibling
) {
418 if ((hispgrp
= p
->p_pgrp
) != pgrp
&&
419 hispgrp
->pg_session
== mysession
&&
420 p
->p_stat
!= SZOMB
) {
423 else if (--hispgrp
->pg_jobc
== 0)
427 lwkt_reltoken(&proc_token
);
431 * A process group has become orphaned;
432 * if there are any stopped processes in the group,
433 * hang-up all process in that group.
435 * The caller must hold proc_token.
438 orphanpg(struct pgrp
*pg
)
442 LIST_FOREACH(p
, &pg
->pg_members
, p_pglist
) {
443 if (p
->p_stat
== SSTOP
) {
444 LIST_FOREACH(p
, &pg
->pg_members
, p_pglist
) {
454 * Add a new process to the allproc list and the PID hash. This
455 * also assigns a pid to the new process.
460 proc_add_allproc(struct proc
*p
)
464 if ((random_offset
= randompid
) != 0) {
466 random_offset
= karc4random() % random_offset
;
470 lwkt_gettoken(&proc_token
);
471 p
->p_pid
= proc_getnewpid_locked(random_offset
);
472 LIST_INSERT_HEAD(&allproc
, p
, p_list
);
473 LIST_INSERT_HEAD(PIDHASH(p
->p_pid
), p
, p_hash
);
474 lwkt_reltoken(&proc_token
);
478 * Calculate a new process pid. This function is integrated into
479 * proc_add_allproc() to guarentee that the new pid is not reused before
480 * the new process can be added to the allproc list.
482 * The caller must hold proc_token.
486 proc_getnewpid_locked(int random_offset
)
488 static pid_t nextpid
;
489 static pid_t pidchecked
;
493 * Find an unused process ID. We remember a range of unused IDs
494 * ready to use (from nextpid+1 through pidchecked-1).
496 nextpid
= nextpid
+ 1 + random_offset
;
499 * If the process ID prototype has wrapped around,
500 * restart somewhat above 0, as the low-numbered procs
501 * tend to include daemons that don't exit.
503 if (nextpid
>= PID_MAX
) {
504 nextpid
= nextpid
% PID_MAX
;
509 if (nextpid
>= pidchecked
) {
512 pidchecked
= PID_MAX
;
514 * Scan the active and zombie procs to check whether this pid
515 * is in use. Remember the lowest pid that's greater
516 * than nextpid, so we can avoid checking for a while.
518 p
= LIST_FIRST(&allproc
);
520 for (; p
!= 0; p
= LIST_NEXT(p
, p_list
)) {
521 while (p
->p_pid
== nextpid
||
522 p
->p_pgrp
->pg_id
== nextpid
||
523 p
->p_session
->s_sid
== nextpid
) {
525 if (nextpid
>= pidchecked
)
528 if (p
->p_pid
> nextpid
&& pidchecked
> p
->p_pid
)
529 pidchecked
= p
->p_pid
;
530 if (p
->p_pgrp
->pg_id
> nextpid
&&
531 pidchecked
> p
->p_pgrp
->pg_id
)
532 pidchecked
= p
->p_pgrp
->pg_id
;
533 if (p
->p_session
->s_sid
> nextpid
&&
534 pidchecked
> p
->p_session
->s_sid
)
535 pidchecked
= p
->p_session
->s_sid
;
539 p
= LIST_FIRST(&zombproc
);
547 * Called from exit1 to remove a process from the allproc
548 * list and move it to the zombie list.
553 proc_move_allproc_zombie(struct proc
*p
)
555 lwkt_gettoken(&proc_token
);
557 tsleep(p
, 0, "reap1", hz
/ 10);
559 LIST_REMOVE(p
, p_list
);
560 LIST_INSERT_HEAD(&zombproc
, p
, p_list
);
561 LIST_REMOVE(p
, p_hash
);
563 lwkt_reltoken(&proc_token
);
568 * This routine is called from kern_wait() and will remove the process
569 * from the zombie list and the sibling list. This routine will block
570 * if someone has a lock on the proces (p_lock).
575 proc_remove_zombie(struct proc
*p
)
577 lwkt_gettoken(&proc_token
);
579 tsleep(p
, 0, "reap1", hz
/ 10);
581 LIST_REMOVE(p
, p_list
); /* off zombproc */
582 LIST_REMOVE(p
, p_sibling
);
583 lwkt_reltoken(&proc_token
);
587 * Scan all processes on the allproc list. The process is automatically
588 * held for the callback. A return value of -1 terminates the loop.
591 * The callback is made with the process held and proc_token held.
594 allproc_scan(int (*callback
)(struct proc
*, void *), void *data
)
599 lwkt_gettoken(&proc_token
);
600 LIST_FOREACH(p
, &allproc
, p_list
) {
602 r
= callback(p
, data
);
607 lwkt_reltoken(&proc_token
);
611 * Scan all lwps of processes on the allproc list. The lwp is automatically
612 * held for the callback. A return value of -1 terminates the loop.
615 * The callback is made with the proces and lwp both held, and proc_token held.
618 alllwp_scan(int (*callback
)(struct lwp
*, void *), void *data
)
624 lwkt_gettoken(&proc_token
);
625 LIST_FOREACH(p
, &allproc
, p_list
) {
627 FOREACH_LWP_IN_PROC(lp
, p
) {
629 r
= callback(lp
, data
);
636 lwkt_reltoken(&proc_token
);
640 * Scan all processes on the zombproc list. The process is automatically
641 * held for the callback. A return value of -1 terminates the loop.
644 * The callback is made with the proces held and proc_token held.
647 zombproc_scan(int (*callback
)(struct proc
*, void *), void *data
)
652 lwkt_gettoken(&proc_token
);
653 LIST_FOREACH(p
, &zombproc
, p_list
) {
655 r
= callback(p
, data
);
660 lwkt_reltoken(&proc_token
);
670 DB_SHOW_COMMAND(pgrpdump
, pgrpdump
)
676 for (i
= 0; i
<= pgrphash
; i
++) {
677 if (!LIST_EMPTY(&pgrphashtbl
[i
])) {
678 kprintf("\tindx %d\n", i
);
679 LIST_FOREACH(pgrp
, &pgrphashtbl
[i
], pg_hash
) {
681 "\tpgrp %p, pgid %ld, sess %p, sesscnt %d, mem %p\n",
682 (void *)pgrp
, (long)pgrp
->pg_id
,
683 (void *)pgrp
->pg_session
,
684 pgrp
->pg_session
->s_count
,
685 (void *)LIST_FIRST(&pgrp
->pg_members
));
686 LIST_FOREACH(p
, &pgrp
->pg_members
, p_pglist
) {
687 kprintf("\t\tpid %ld addr %p pgrp %p\n",
688 (long)p
->p_pid
, (void *)p
,
698 * Locate a process on the zombie list. Return a process or NULL.
700 * The caller must hold proc_token if a stable result is desired.
701 * No other requirements.
708 lwkt_gettoken(&proc_token
);
709 LIST_FOREACH(p
, &zombproc
, p_list
) {
710 if (p
->p_pid
== pid
) {
711 lwkt_reltoken(&proc_token
);
715 lwkt_reltoken(&proc_token
);
720 * The caller must hold proc_token.
723 sysctl_out_proc(struct proc
*p
, struct sysctl_req
*req
, int flags
)
725 struct kinfo_proc ki
;
727 int skp
= 0, had_output
= 0;
730 bzero(&ki
, sizeof(ki
));
731 fill_kinfo_proc(p
, &ki
);
732 if ((flags
& KERN_PROC_FLAG_LWP
) == 0)
735 FOREACH_LWP_IN_PROC(lp
, p
) {
737 fill_kinfo_lwp(lp
, &ki
.kp_lwp
);
739 error
= SYSCTL_OUT(req
, &ki
, sizeof(ki
));
746 /* We need to output at least the proc, even if there is no lwp. */
747 if (had_output
== 0) {
748 error
= SYSCTL_OUT(req
, &ki
, sizeof(ki
));
754 * The caller must hold proc_token.
757 sysctl_out_proc_kthread(struct thread
*td
, struct sysctl_req
*req
, int flags
)
759 struct kinfo_proc ki
;
762 fill_kinfo_proc_kthread(td
, &ki
);
763 error
= SYSCTL_OUT(req
, &ki
, sizeof(ki
));
773 sysctl_kern_proc(SYSCTL_HANDLER_ARGS
)
775 int *name
= (int*) arg1
;
776 int oid
= oidp
->oid_number
;
777 u_int namelen
= arg2
;
779 struct proclist
*plist
;
781 int doingzomb
, flags
= 0;
785 struct ucred
*cr1
= curproc
->p_ucred
;
787 flags
= oid
& KERN_PROC_FLAGMASK
;
788 oid
&= ~KERN_PROC_FLAGMASK
;
790 if ((oid
== KERN_PROC_ALL
&& namelen
!= 0) ||
791 (oid
!= KERN_PROC_ALL
&& namelen
!= 1))
794 lwkt_gettoken(&proc_token
);
795 if (oid
== KERN_PROC_PID
) {
796 p
= pfind((pid_t
)name
[0]);
799 if (!PRISON_CHECK(cr1
, p
->p_ucred
))
802 error
= sysctl_out_proc(p
, req
, flags
);
808 /* overestimate by 5 procs */
809 error
= SYSCTL_OUT(req
, 0, sizeof (struct kinfo_proc
) * 5);
813 for (doingzomb
= 0; doingzomb
<= 1; doingzomb
++) {
818 LIST_FOREACH(p
, plist
, p_list
) {
820 * Show a user only their processes.
822 if ((!ps_showallprocs
) && p_trespass(cr1
, p
->p_ucred
))
825 * Skip embryonic processes.
827 if (p
->p_stat
== SIDL
)
830 * TODO - make more efficient (see notes below).
835 /* could do this by traversing pgrp */
836 if (p
->p_pgrp
== NULL
||
837 p
->p_pgrp
->pg_id
!= (pid_t
)name
[0])
842 if ((p
->p_flag
& P_CONTROLT
) == 0 ||
843 p
->p_session
== NULL
||
844 p
->p_session
->s_ttyp
== NULL
||
845 dev2udev(p
->p_session
->s_ttyp
->t_dev
) !=
851 if (p
->p_ucred
== NULL
||
852 p
->p_ucred
->cr_uid
!= (uid_t
)name
[0])
857 if (p
->p_ucred
== NULL
||
858 p
->p_ucred
->cr_ruid
!= (uid_t
)name
[0])
863 if (!PRISON_CHECK(cr1
, p
->p_ucred
))
866 error
= sysctl_out_proc(p
, req
, flags
);
874 * Iterate over all active cpus and scan their thread list. Start
875 * with the next logical cpu and end with our original cpu. We
876 * migrate our own thread to each target cpu in order to safely scan
877 * its thread list. In the last loop we migrate back to our original
880 origcpu
= mycpu
->gd_cpuid
;
881 if (!ps_showallthreads
|| jailed(cr1
))
884 for (n
= 1; n
<= ncpus
; ++n
) {
888 nid
= (origcpu
+ n
) % ncpus
;
889 if ((smp_active_mask
& CPUMASK(nid
)) == 0)
891 rgd
= globaldata_find(nid
);
892 lwkt_setcpu_self(rgd
);
894 TAILQ_FOREACH(td
, &mycpu
->gd_tdallq
, td_allq
) {
907 error
= sysctl_out_proc_kthread(td
, req
, doingzomb
);
914 lwkt_reltoken(&proc_token
);
919 * This sysctl allows a process to retrieve the argument list or process
920 * title for another process without groping around in the address space
921 * of the other process. It also allow a process to set its own "process
922 * title to a string of its own choice.
927 sysctl_kern_proc_args(SYSCTL_HANDLER_ARGS
)
929 int *name
= (int*) arg1
;
930 u_int namelen
= arg2
;
934 struct ucred
*cr1
= curproc
->p_ucred
;
939 lwkt_gettoken(&proc_token
);
940 p
= pfind((pid_t
)name
[0]);
944 if ((!ps_argsopen
) && p_trespass(cr1
, p
->p_ucred
))
947 if (req
->newptr
&& curproc
!= p
) {
953 if (req
->oldptr
&& p
->p_args
!= NULL
) {
954 error
= SYSCTL_OUT(req
, p
->p_args
->ar_args
,
955 p
->p_args
->ar_length
);
957 if (req
->newptr
== NULL
) {
962 if (p
->p_args
&& --p
->p_args
->ar_ref
== 0)
963 FREE(p
->p_args
, M_PARGS
);
966 if (req
->newlen
+ sizeof(struct pargs
) > ps_arg_cache_limit
) {
971 MALLOC(pa
, struct pargs
*, sizeof(struct pargs
) + req
->newlen
,
974 pa
->ar_length
= req
->newlen
;
975 error
= SYSCTL_IN(req
, pa
->ar_args
, req
->newlen
);
982 lwkt_reltoken(&proc_token
);
987 sysctl_kern_proc_cwd(SYSCTL_HANDLER_ARGS
)
989 int *name
= (int*) arg1
;
990 u_int namelen
= arg2
;
993 char *fullpath
, *freepath
;
994 struct ucred
*cr1
= curproc
->p_ucred
;
999 lwkt_gettoken(&proc_token
);
1000 p
= pfind((pid_t
)name
[0]);
1005 * If we are not allowed to see other args, we certainly shouldn't
1006 * get the cwd either. Also check the usual trespassing.
1008 if ((!ps_argsopen
) && p_trespass(cr1
, p
->p_ucred
))
1012 if (req
->oldptr
&& p
->p_fd
!= NULL
) {
1013 error
= cache_fullpath(p
, &p
->p_fd
->fd_ncdir
,
1014 &fullpath
, &freepath
, 0);
1017 error
= SYSCTL_OUT(req
, fullpath
, strlen(fullpath
) + 1);
1018 kfree(freepath
, M_TEMP
);
1024 lwkt_reltoken(&proc_token
);
1028 SYSCTL_NODE(_kern
, KERN_PROC
, proc
, CTLFLAG_RD
, 0, "Process table");
1030 SYSCTL_PROC(_kern_proc
, KERN_PROC_ALL
, all
, CTLFLAG_RD
|CTLTYPE_STRUCT
,
1031 0, 0, sysctl_kern_proc
, "S,proc", "Return entire process table");
1033 SYSCTL_NODE(_kern_proc
, KERN_PROC_PGRP
, pgrp
, CTLFLAG_RD
,
1034 sysctl_kern_proc
, "Process table");
1036 SYSCTL_NODE(_kern_proc
, KERN_PROC_TTY
, tty
, CTLFLAG_RD
,
1037 sysctl_kern_proc
, "Process table");
1039 SYSCTL_NODE(_kern_proc
, KERN_PROC_UID
, uid
, CTLFLAG_RD
,
1040 sysctl_kern_proc
, "Process table");
1042 SYSCTL_NODE(_kern_proc
, KERN_PROC_RUID
, ruid
, CTLFLAG_RD
,
1043 sysctl_kern_proc
, "Process table");
1045 SYSCTL_NODE(_kern_proc
, KERN_PROC_PID
, pid
, CTLFLAG_RD
,
1046 sysctl_kern_proc
, "Process table");
1048 SYSCTL_NODE(_kern_proc
, (KERN_PROC_ALL
| KERN_PROC_FLAG_LWP
), all_lwp
, CTLFLAG_RD
,
1049 sysctl_kern_proc
, "Process table");
1051 SYSCTL_NODE(_kern_proc
, (KERN_PROC_PGRP
| KERN_PROC_FLAG_LWP
), pgrp_lwp
, CTLFLAG_RD
,
1052 sysctl_kern_proc
, "Process table");
1054 SYSCTL_NODE(_kern_proc
, (KERN_PROC_TTY
| KERN_PROC_FLAG_LWP
), tty_lwp
, CTLFLAG_RD
,
1055 sysctl_kern_proc
, "Process table");
1057 SYSCTL_NODE(_kern_proc
, (KERN_PROC_UID
| KERN_PROC_FLAG_LWP
), uid_lwp
, CTLFLAG_RD
,
1058 sysctl_kern_proc
, "Process table");
1060 SYSCTL_NODE(_kern_proc
, (KERN_PROC_RUID
| KERN_PROC_FLAG_LWP
), ruid_lwp
, CTLFLAG_RD
,
1061 sysctl_kern_proc
, "Process table");
1063 SYSCTL_NODE(_kern_proc
, (KERN_PROC_PID
| KERN_PROC_FLAG_LWP
), pid_lwp
, CTLFLAG_RD
,
1064 sysctl_kern_proc
, "Process table");
1066 SYSCTL_NODE(_kern_proc
, KERN_PROC_ARGS
, args
, CTLFLAG_RW
| CTLFLAG_ANYBODY
,
1067 sysctl_kern_proc_args
, "Process argument list");
1069 SYSCTL_NODE(_kern_proc
, KERN_PROC_CWD
, cwd
, CTLFLAG_RD
| CTLFLAG_ANYBODY
,
1070 sysctl_kern_proc_cwd
, "Process argument list");