2 * Copyright (c) 1982, 1986, 1989, 1991, 1993
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29 * @(#)kern_proc.c 8.7 (Berkeley) 2/14/95
33 #include <sys/cdefs.h>
34 __FBSDID("$FreeBSD$");
36 #include "opt_ktrace.h"
37 #include "opt_kstack_pages.h"
39 #include <sys/param.h>
40 #include <sys/systm.h>
41 #include <sys/kernel.h>
43 #include <sys/malloc.h>
44 #include <sys/mutex.h>
46 #include <sys/sysent.h>
47 #include <sys/sched.h>
49 #include <sys/sysctl.h>
50 #include <sys/filedesc.h>
52 #include <sys/signalvar.h>
56 #include <sys/vnode.h>
59 #include <sys/ktrace.h>
63 #include <vm/vm_extern.h>
65 #include <vm/vm_map.h>
68 MALLOC_DEFINE(M_PGRP, "pgrp", "process group header");
69 MALLOC_DEFINE(M_SESSION, "session", "session header");
70 static MALLOC_DEFINE(M_PROC, "proc", "Proc structures");
71 MALLOC_DEFINE(M_SUBPROC, "subproc", "Proc sub-structures");
73 static void doenterpgrp(struct proc *, struct pgrp *);
74 static void orphanpg(struct pgrp *pg);
75 static void fill_kinfo_proc_only(struct proc *p, struct kinfo_proc *kp);
76 static void fill_kinfo_thread(struct thread *td, struct kinfo_proc *kp);
77 static void pgadjustjobc(struct pgrp *pgrp, int entering);
78 static void pgdelete(struct pgrp *);
79 static int proc_ctor(void *mem, int size, void *arg, int flags);
80 static void proc_dtor(void *mem, int size, void *arg);
81 static int proc_init(void *mem, int size, int flags);
82 static void proc_fini(void *mem, int size);
87 struct pidhashhead *pidhashtbl;
89 struct pgrphashhead *pgrphashtbl;
91 struct proclist allproc;
92 struct proclist zombproc;
93 struct sx allproc_lock;
94 struct sx proctree_lock;
95 struct mtx pargs_ref_lock;
96 struct mtx ppeers_lock;
98 uma_zone_t ithread_zone;
100 int kstack_pages = KSTACK_PAGES;
101 SYSCTL_INT(_kern, OID_AUTO, kstack_pages, CTLFLAG_RD, &kstack_pages, 0, "");
103 CTASSERT(sizeof(struct kinfo_proc) == KINFO_PROC_SIZE);
106 * Initialize global process hashing structures.
112 sx_init(&allproc_lock, "allproc");
113 sx_init(&proctree_lock, "proctree");
114 mtx_init(&pargs_ref_lock, "struct pargs.ref", NULL, MTX_DEF);
115 mtx_init(&ppeers_lock, "p_peers", NULL, MTX_DEF);
117 LIST_INIT(&zombproc);
118 pidhashtbl = hashinit(maxproc / 4, M_PROC, &pidhash);
119 pgrphashtbl = hashinit(maxproc / 4, M_PROC, &pgrphash);
120 proc_zone = uma_zcreate("PROC", sched_sizeof_proc(),
121 proc_ctor, proc_dtor, proc_init, proc_fini,
122 UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
127 * Prepare a proc for use.
130 proc_ctor(void *mem, int size, void *arg, int flags)
134 p = (struct proc *)mem;
139 * Reclaim a proc after use.
142 proc_dtor(void *mem, int size, void *arg)
150 /* INVARIANTS checks go here */
151 p = (struct proc *)mem;
152 td = FIRST_THREAD_IN_PROC(p);
154 KASSERT((p->p_numthreads == 1),
155 ("bad number of threads in exiting process"));
156 KASSERT((p->p_numksegrps == 1), ("free proc with > 1 ksegrp"));
157 KASSERT((td != NULL), ("proc_dtor: bad thread pointer"));
158 kg = FIRST_KSEGRP_IN_PROC(p);
159 KASSERT((kg != NULL), ("proc_dtor: bad kg pointer"));
160 KASSERT(STAILQ_EMPTY(&p->p_ktr), ("proc_dtor: non-empty p_ktr"));
163 /* Dispose of an alternate kstack, if it exists.
164 * XXX What if there are more than one thread in the proc?
165 * The first thread in the proc is special and not
166 * freed, so you gotta do this here.
168 if (((p->p_flag & P_KTHREAD) != 0) && (td->td_altkstack != 0))
169 vm_thread_dispose_altkstack(td);
173 * Initialize type-stable parts of a proc (when newly created).
176 proc_init(void *mem, int size, int flags)
182 p = (struct proc *)mem;
183 p->p_sched = (struct p_sched *)&p[1];
186 bzero(&p->p_mtx, sizeof(struct mtx));
187 mtx_init(&p->p_mtx, "process lock", NULL, MTX_DEF | MTX_DUPOK);
188 p->p_stats = pstats_alloc();
189 proc_linkup(p, kg, td);
190 sched_newproc(p, kg, td);
195 * UMA should ensure that this function is never called.
196 * Freeing a proc structure would violate type stability.
199 proc_fini(void *mem, int size)
202 panic("proc reclaimed");
206 * Is p an inferior of the current process?
210 register struct proc *p;
213 sx_assert(&proctree_lock, SX_LOCKED);
214 for (; p != curproc; p = p->p_pptr)
221 * Locate a process by number; return only "live" processes -- i.e., neither
222 * zombies nor newly born but incompletely initialized processes. By not
223 * returning processes in the PRS_NEW state, we allow callers to avoid
224 * testing for that condition to avoid dereferencing p_ucred, et al.
230 register struct proc *p;
232 sx_slock(&allproc_lock);
233 LIST_FOREACH(p, PIDHASH(pid), p_hash)
234 if (p->p_pid == pid) {
235 if (p->p_state == PRS_NEW) {
242 sx_sunlock(&allproc_lock);
247 * Locate a process group by number.
248 * The caller must hold proctree_lock.
254 register struct pgrp *pgrp;
256 sx_assert(&proctree_lock, SX_LOCKED);
258 LIST_FOREACH(pgrp, PGRPHASH(pgid), pg_hash) {
259 if (pgrp->pg_id == pgid) {
268 * Create a new process group.
269 * pgid must be equal to the pid of p.
270 * Begin a new session if required.
273 enterpgrp(p, pgid, pgrp, sess)
274 register struct proc *p;
277 struct session *sess;
281 sx_assert(&proctree_lock, SX_XLOCKED);
283 KASSERT(pgrp != NULL, ("enterpgrp: pgrp == NULL"));
284 KASSERT(p->p_pid == pgid,
285 ("enterpgrp: new pgrp and pid != pgid"));
287 pgrp2 = pgfind(pgid);
289 KASSERT(pgrp2 == NULL,
290 ("enterpgrp: pgrp with pgid exists"));
291 KASSERT(!SESS_LEADER(p),
292 ("enterpgrp: session leader attempted setpgrp"));
294 mtx_init(&pgrp->pg_mtx, "process group", NULL, MTX_DEF | MTX_DUPOK);
300 mtx_init(&sess->s_mtx, "session", NULL, MTX_DEF);
301 mtx_lock(&Giant); /* XXX TTY */
303 p->p_flag &= ~P_CONTROLT;
307 sess->s_sid = p->p_pid;
309 sess->s_ttyvp = NULL;
311 bcopy(p->p_session->s_login, sess->s_login,
312 sizeof(sess->s_login));
313 pgrp->pg_session = sess;
314 KASSERT(p == curproc,
315 ("enterpgrp: mksession and p != curproc"));
317 mtx_lock(&Giant); /* XXX TTY */
318 pgrp->pg_session = p->p_session;
319 SESS_LOCK(pgrp->pg_session);
320 pgrp->pg_session->s_count++;
321 SESS_UNLOCK(pgrp->pg_session);
325 LIST_INIT(&pgrp->pg_members);
328 * As we have an exclusive lock of proctree_lock,
329 * this should not deadlock.
331 LIST_INSERT_HEAD(PGRPHASH(pgid), pgrp, pg_hash);
333 SLIST_INIT(&pgrp->pg_sigiolst);
335 mtx_unlock(&Giant); /* XXX TTY */
337 doenterpgrp(p, pgrp);
343 * Move p to an existing process group
346 enterthispgrp(p, pgrp)
347 register struct proc *p;
351 sx_assert(&proctree_lock, SX_XLOCKED);
352 PROC_LOCK_ASSERT(p, MA_NOTOWNED);
353 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
354 PGRP_LOCK_ASSERT(p->p_pgrp, MA_NOTOWNED);
355 SESS_LOCK_ASSERT(p->p_session, MA_NOTOWNED);
356 KASSERT(pgrp->pg_session == p->p_session,
357 ("%s: pgrp's session %p, p->p_session %p.\n",
361 KASSERT(pgrp != p->p_pgrp,
362 ("%s: p belongs to pgrp.", __func__));
364 doenterpgrp(p, pgrp);
370 * Move p to a process group
377 struct pgrp *savepgrp;
379 sx_assert(&proctree_lock, SX_XLOCKED);
380 PROC_LOCK_ASSERT(p, MA_NOTOWNED);
381 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
382 PGRP_LOCK_ASSERT(p->p_pgrp, MA_NOTOWNED);
383 SESS_LOCK_ASSERT(p->p_session, MA_NOTOWNED);
385 savepgrp = p->p_pgrp;
388 * Adjust eligibility of affected pgrps to participate in job control.
389 * Increment eligibility counts before decrementing, otherwise we
390 * could reach 0 spuriously during the first call.
393 fixjobc(p, p->p_pgrp, 0);
395 mtx_lock(&Giant); /* XXX TTY */
399 LIST_REMOVE(p, p_pglist);
402 LIST_INSERT_HEAD(&pgrp->pg_members, p, p_pglist);
403 PGRP_UNLOCK(savepgrp);
405 mtx_unlock(&Giant); /* XXX TTY */
406 if (LIST_EMPTY(&savepgrp->pg_members))
411 * remove process from process group
415 register struct proc *p;
417 struct pgrp *savepgrp;
419 sx_assert(&proctree_lock, SX_XLOCKED);
420 savepgrp = p->p_pgrp;
421 mtx_lock(&Giant); /* XXX TTY */
424 LIST_REMOVE(p, p_pglist);
427 PGRP_UNLOCK(savepgrp);
428 mtx_unlock(&Giant); /* XXX TTY */
429 if (LIST_EMPTY(&savepgrp->pg_members))
435 * delete a process group
439 register struct pgrp *pgrp;
441 struct session *savesess;
443 sx_assert(&proctree_lock, SX_XLOCKED);
444 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
445 SESS_LOCK_ASSERT(pgrp->pg_session, MA_NOTOWNED);
448 * Reset any sigio structures pointing to us as a result of
449 * F_SETOWN with our pgid.
451 funsetownlst(&pgrp->pg_sigiolst);
453 mtx_lock(&Giant); /* XXX TTY */
455 if (pgrp->pg_session->s_ttyp != NULL &&
456 pgrp->pg_session->s_ttyp->t_pgrp == pgrp)
457 pgrp->pg_session->s_ttyp->t_pgrp = NULL;
458 LIST_REMOVE(pgrp, pg_hash);
459 savesess = pgrp->pg_session;
462 mtx_destroy(&pgrp->pg_mtx);
464 mtx_unlock(&Giant); /* XXX TTY */
468 pgadjustjobc(pgrp, entering)
478 if (pgrp->pg_jobc == 0)
485 * Adjust pgrp jobc counters when specified process changes process group.
486 * We count the number of processes in each process group that "qualify"
487 * the group for terminal job control (those with a parent in a different
488 * process group of the same session). If that count reaches zero, the
489 * process group becomes orphaned. Check both the specified process'
490 * process group and that of its children.
491 * entering == 0 => p is leaving specified group.
492 * entering == 1 => p is entering specified group.
495 fixjobc(p, pgrp, entering)
496 register struct proc *p;
497 register struct pgrp *pgrp;
500 register struct pgrp *hispgrp;
501 register struct session *mysession;
503 sx_assert(&proctree_lock, SX_LOCKED);
504 PROC_LOCK_ASSERT(p, MA_NOTOWNED);
505 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
506 SESS_LOCK_ASSERT(pgrp->pg_session, MA_NOTOWNED);
509 * Check p's parent to see whether p qualifies its own process
510 * group; if so, adjust count for p's process group.
512 mysession = pgrp->pg_session;
513 if ((hispgrp = p->p_pptr->p_pgrp) != pgrp &&
514 hispgrp->pg_session == mysession)
515 pgadjustjobc(pgrp, entering);
518 * Check this process' children to see whether they qualify
519 * their process groups; if so, adjust counts for children's
522 LIST_FOREACH(p, &p->p_children, p_sibling) {
524 if (hispgrp == pgrp ||
525 hispgrp->pg_session != mysession)
528 if (p->p_state == PRS_ZOMBIE) {
533 pgadjustjobc(hispgrp, entering);
538 * A process group has become orphaned;
539 * if there are any stopped processes in the group,
540 * hang-up all process in that group.
546 register struct proc *p;
548 PGRP_LOCK_ASSERT(pg, MA_OWNED);
550 LIST_FOREACH(p, &pg->pg_members, p_pglist) {
552 if (P_SHOULDSTOP(p)) {
554 LIST_FOREACH(p, &pg->pg_members, p_pglist) {
567 sessrele(struct session *s)
575 if (s->s_ttyp != NULL)
577 mtx_destroy(&s->s_mtx);
586 DB_SHOW_COMMAND(pgrpdump, pgrpdump)
588 register struct pgrp *pgrp;
589 register struct proc *p;
592 for (i = 0; i <= pgrphash; i++) {
593 if (!LIST_EMPTY(&pgrphashtbl[i])) {
594 printf("\tindx %d\n", i);
595 LIST_FOREACH(pgrp, &pgrphashtbl[i], pg_hash) {
597 "\tpgrp %p, pgid %ld, sess %p, sesscnt %d, mem %p\n",
598 (void *)pgrp, (long)pgrp->pg_id,
599 (void *)pgrp->pg_session,
600 pgrp->pg_session->s_count,
601 (void *)LIST_FIRST(&pgrp->pg_members));
602 LIST_FOREACH(p, &pgrp->pg_members, p_pglist) {
603 printf("\t\tpid %ld addr %p pgrp %p\n",
604 (long)p->p_pid, (void *)p,
614 * Clear kinfo_proc and fill in any information that is common
615 * to all threads in the process.
616 * Must be called with the target process locked.
619 fill_kinfo_proc_only(struct proc *p, struct kinfo_proc *kp)
628 bzero(kp, sizeof(*kp));
630 kp->ki_structsize = sizeof(*kp);
632 PROC_LOCK_ASSERT(p, MA_OWNED);
633 kp->ki_addr =/* p->p_addr; */0; /* XXXKSE */
634 kp->ki_args = p->p_args;
635 kp->ki_textvp = p->p_textvp;
637 kp->ki_tracep = p->p_tracevp;
638 mtx_lock(&ktrace_mtx);
639 kp->ki_traceflag = p->p_traceflag;
640 mtx_unlock(&ktrace_mtx);
643 kp->ki_vmspace = p->p_vmspace;
644 kp->ki_flag = p->p_flag;
647 kp->ki_uid = cred->cr_uid;
648 kp->ki_ruid = cred->cr_ruid;
649 kp->ki_svuid = cred->cr_svuid;
650 /* XXX bde doesn't like KI_NGROUPS */
651 kp->ki_ngroups = min(cred->cr_ngroups, KI_NGROUPS);
652 bcopy(cred->cr_groups, kp->ki_groups,
653 kp->ki_ngroups * sizeof(gid_t));
654 kp->ki_rgid = cred->cr_rgid;
655 kp->ki_svgid = cred->cr_svgid;
656 /* If jailed(cred), emulate the old P_JAILED flag. */
658 kp->ki_flag |= P_JAILED;
659 /* If inside a jail, use 0 as a jail ID. */
660 if (!jailed(curthread->td_ucred))
661 kp->ki_jid = cred->cr_prison->pr_id;
666 mtx_lock(&ps->ps_mtx);
667 kp->ki_sigignore = ps->ps_sigignore;
668 kp->ki_sigcatch = ps->ps_sigcatch;
669 mtx_unlock(&ps->ps_mtx);
671 mtx_lock_spin(&sched_lock);
672 if (p->p_state != PRS_NEW &&
673 p->p_state != PRS_ZOMBIE &&
674 p->p_vmspace != NULL) {
675 struct vmspace *vm = p->p_vmspace;
677 kp->ki_size = vm->vm_map.size;
678 kp->ki_rssize = vmspace_resident_count(vm); /*XXX*/
679 FOREACH_THREAD_IN_PROC(p, td0) {
680 if (!TD_IS_SWAPPED(td0))
681 kp->ki_rssize += td0->td_kstack_pages;
682 if (td0->td_altkstack_obj != NULL)
683 kp->ki_rssize += td0->td_altkstack_pages;
685 kp->ki_swrss = vm->vm_swrss;
686 kp->ki_tsize = vm->vm_tsize;
687 kp->ki_dsize = vm->vm_dsize;
688 kp->ki_ssize = vm->vm_ssize;
689 } else if (p->p_state == PRS_ZOMBIE)
691 kp->ki_sflag = p->p_sflag;
692 kp->ki_swtime = p->p_swtime;
693 kp->ki_pid = p->p_pid;
694 kp->ki_nice = p->p_nice;
695 bintime2timeval(&p->p_rux.rux_runtime, &tv);
696 kp->ki_runtime = tv.tv_sec * (u_int64_t)1000000 + tv.tv_usec;
697 mtx_unlock_spin(&sched_lock);
698 if ((p->p_sflag & PS_INMEM) && p->p_stats != NULL) {
699 kp->ki_start = p->p_stats->p_start;
700 timevaladd(&kp->ki_start, &boottime);
701 kp->ki_rusage = p->p_stats->p_ru;
702 calcru(p, &kp->ki_rusage.ru_utime, &kp->ki_rusage.ru_stime);
703 calccru(p, &kp->ki_childutime, &kp->ki_childstime);
705 /* Some callers want child-times in a single value */
706 kp->ki_childtime = kp->ki_childstime;
707 timevaladd(&kp->ki_childtime, &kp->ki_childutime);
711 kp->ki_pgid = p->p_pgrp->pg_id;
712 kp->ki_jobc = p->p_pgrp->pg_jobc;
713 sp = p->p_pgrp->pg_session;
716 kp->ki_sid = sp->s_sid;
718 strlcpy(kp->ki_login, sp->s_login,
719 sizeof(kp->ki_login));
721 kp->ki_kiflag |= KI_CTTY;
723 kp->ki_kiflag |= KI_SLEADER;
728 if ((p->p_flag & P_CONTROLT) && tp != NULL) {
729 kp->ki_tdev = dev2udev(tp->t_dev);
730 kp->ki_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID;
732 kp->ki_tsid = tp->t_session->s_sid;
735 if (p->p_comm[0] != '\0') {
736 strlcpy(kp->ki_comm, p->p_comm, sizeof(kp->ki_comm));
737 strlcpy(kp->ki_ocomm, p->p_comm, sizeof(kp->ki_ocomm));
739 if (p->p_sysent && p->p_sysent->sv_name != NULL &&
740 p->p_sysent->sv_name[0] != '\0')
741 strlcpy(kp->ki_emul, p->p_sysent->sv_name, sizeof(kp->ki_emul));
742 kp->ki_siglist = p->p_siglist;
743 kp->ki_xstat = p->p_xstat;
744 kp->ki_acflag = p->p_acflag;
745 kp->ki_lock = p->p_lock;
747 kp->ki_ppid = p->p_pptr->p_pid;
751 * Fill in information that is thread specific.
752 * Must be called with sched_lock locked.
755 fill_kinfo_thread(struct thread *td, struct kinfo_proc *kp)
762 if (td->td_wmesg != NULL)
763 strlcpy(kp->ki_wmesg, td->td_wmesg, sizeof(kp->ki_wmesg));
765 bzero(kp->ki_wmesg, sizeof(kp->ki_wmesg));
766 if (TD_ON_LOCK(td)) {
767 kp->ki_kiflag |= KI_LOCKBLOCK;
768 strlcpy(kp->ki_lockname, td->td_lockname,
769 sizeof(kp->ki_lockname));
771 kp->ki_kiflag &= ~KI_LOCKBLOCK;
772 bzero(kp->ki_lockname, sizeof(kp->ki_lockname));
775 if (p->p_state == PRS_NORMAL) { /* XXXKSE very approximate */
776 if (TD_ON_RUNQ(td) ||
780 } else if (P_SHOULDSTOP(p)) {
782 } else if (TD_IS_SLEEPING(td)) {
783 kp->ki_stat = SSLEEP;
784 } else if (TD_ON_LOCK(td)) {
789 } else if (p->p_state == PRS_ZOMBIE) {
797 /* things in the KSE GROUP */
798 kp->ki_estcpu = kg->kg_estcpu;
799 kp->ki_slptime = kg->kg_slptime;
800 kp->ki_pri.pri_user = kg->kg_user_pri;
801 kp->ki_pri.pri_class = kg->kg_pri_class;
803 /* Things in the thread */
804 kp->ki_wchan = td->td_wchan;
805 kp->ki_pri.pri_level = td->td_priority;
806 kp->ki_pri.pri_native = td->td_base_pri;
807 kp->ki_lastcpu = td->td_lastcpu;
808 kp->ki_oncpu = td->td_oncpu;
809 kp->ki_tdflags = td->td_flags;
810 kp->ki_tid = td->td_tid;
811 kp->ki_numthreads = p->p_numthreads;
812 kp->ki_pcb = td->td_pcb;
813 kp->ki_kstack = (void *)td->td_kstack;
814 kp->ki_pctcpu = sched_pctcpu(td);
816 /* We can't get this anymore but ps etc never used it anyway. */
819 SIGSETOR(kp->ki_siglist, td->td_siglist);
820 kp->ki_sigmask = td->td_sigmask;
824 * Fill in a kinfo_proc structure for the specified process.
825 * Must be called with the target process locked.
828 fill_kinfo_proc(struct proc *p, struct kinfo_proc *kp)
831 fill_kinfo_proc_only(p, kp);
832 mtx_lock_spin(&sched_lock);
833 if (FIRST_THREAD_IN_PROC(p) != NULL)
834 fill_kinfo_thread(FIRST_THREAD_IN_PROC(p), kp);
835 mtx_unlock_spin(&sched_lock);
842 return (malloc(sizeof(struct pstats), M_SUBPROC, M_ZERO|M_WAITOK));
846 * Copy parts of p_stats; zero the rest of p_stats (statistics).
849 pstats_fork(struct pstats *src, struct pstats *dst)
852 bzero(&dst->pstat_startzero,
853 __rangeof(struct pstats, pstat_startzero, pstat_endzero));
854 bcopy(&src->pstat_startcopy, &dst->pstat_startcopy,
855 __rangeof(struct pstats, pstat_startcopy, pstat_endcopy));
859 pstats_free(struct pstats *ps)
866 * Locate a zombie process by number
873 sx_slock(&allproc_lock);
874 LIST_FOREACH(p, &zombproc, p_list)
875 if (p->p_pid == pid) {
879 sx_sunlock(&allproc_lock);
883 #define KERN_PROC_ZOMBMASK 0x3
884 #define KERN_PROC_NOTHREADS 0x4
887 * Must be called with the process locked and will return with it unlocked.
890 sysctl_out_proc(struct proc *p, struct sysctl_req *req, int flags)
893 struct kinfo_proc kinfo_proc;
896 pid_t pid = p->p_pid;
898 PROC_LOCK_ASSERT(p, MA_OWNED);
900 fill_kinfo_proc_only(p, &kinfo_proc);
901 if (flags & KERN_PROC_NOTHREADS) {
902 mtx_lock_spin(&sched_lock);
903 if (FIRST_THREAD_IN_PROC(p) != NULL)
904 fill_kinfo_thread(FIRST_THREAD_IN_PROC(p), &kinfo_proc);
905 mtx_unlock_spin(&sched_lock);
906 error = SYSCTL_OUT(req, (caddr_t)&kinfo_proc,
909 mtx_lock_spin(&sched_lock);
910 if (FIRST_THREAD_IN_PROC(p) != NULL)
911 FOREACH_THREAD_IN_PROC(p, td) {
912 fill_kinfo_thread(td, &kinfo_proc);
913 error = SYSCTL_OUT(req, (caddr_t)&kinfo_proc,
919 error = SYSCTL_OUT(req, (caddr_t)&kinfo_proc,
921 mtx_unlock_spin(&sched_lock);
926 if (flags & KERN_PROC_ZOMBMASK)
944 sysctl_kern_proc(SYSCTL_HANDLER_ARGS)
946 int *name = (int*) arg1;
947 u_int namelen = arg2;
949 int flags, doingzomb, oid_number;
952 oid_number = oidp->oid_number;
953 if (oid_number != KERN_PROC_ALL &&
954 (oid_number & KERN_PROC_INC_THREAD) == 0)
955 flags = KERN_PROC_NOTHREADS;
958 oid_number &= ~KERN_PROC_INC_THREAD;
960 if (oid_number == KERN_PROC_PID) {
963 error = sysctl_wire_old_buffer(req, 0);
966 p = pfind((pid_t)name[0]);
969 if ((error = p_cansee(curthread, p))) {
973 error = sysctl_out_proc(p, req, flags);
977 switch (oid_number) {
983 if (namelen != 0 && namelen != 1)
993 /* overestimate by 5 procs */
994 error = SYSCTL_OUT(req, 0, sizeof (struct kinfo_proc) * 5);
998 error = sysctl_wire_old_buffer(req, 0);
1001 sx_slock(&allproc_lock);
1002 for (doingzomb=0 ; doingzomb < 2 ; doingzomb++) {
1004 p = LIST_FIRST(&allproc);
1006 p = LIST_FIRST(&zombproc);
1007 for (; p != 0; p = LIST_NEXT(p, p_list)) {
1009 * Skip embryonic processes.
1011 mtx_lock_spin(&sched_lock);
1012 if (p->p_state == PRS_NEW) {
1013 mtx_unlock_spin(&sched_lock);
1016 mtx_unlock_spin(&sched_lock);
1019 * Show a user only appropriate processes.
1021 if (p_cansee(curthread, p)) {
1026 * TODO - make more efficient (see notes below).
1029 switch (oid_number) {
1032 if (p->p_ucred == NULL ||
1033 p->p_ucred->cr_gid != (gid_t)name[0]) {
1039 case KERN_PROC_PGRP:
1040 /* could do this by traversing pgrp */
1041 if (p->p_pgrp == NULL ||
1042 p->p_pgrp->pg_id != (pid_t)name[0]) {
1048 case KERN_PROC_RGID:
1049 if (p->p_ucred == NULL ||
1050 p->p_ucred->cr_rgid != (gid_t)name[0]) {
1056 case KERN_PROC_SESSION:
1057 if (p->p_session == NULL ||
1058 p->p_session->s_sid != (pid_t)name[0]) {
1065 if ((p->p_flag & P_CONTROLT) == 0 ||
1066 p->p_session == NULL) {
1070 SESS_LOCK(p->p_session);
1071 if (p->p_session->s_ttyp == NULL ||
1072 dev2udev(p->p_session->s_ttyp->t_dev) !=
1074 SESS_UNLOCK(p->p_session);
1078 SESS_UNLOCK(p->p_session);
1082 if (p->p_ucred == NULL ||
1083 p->p_ucred->cr_uid != (uid_t)name[0]) {
1089 case KERN_PROC_RUID:
1090 if (p->p_ucred == NULL ||
1091 p->p_ucred->cr_ruid != (uid_t)name[0]) {
1097 case KERN_PROC_PROC:
1105 error = sysctl_out_proc(p, req, flags | doingzomb);
1107 sx_sunlock(&allproc_lock);
1112 sx_sunlock(&allproc_lock);
1117 pargs_alloc(int len)
1121 MALLOC(pa, struct pargs *, sizeof(struct pargs) + len, M_PARGS,
1124 pa->ar_length = len;
1129 pargs_free(struct pargs *pa)
1136 pargs_hold(struct pargs *pa)
1147 pargs_drop(struct pargs *pa)
1153 if (--pa->ar_ref == 0) {
1161 * This sysctl allows a process to retrieve the argument list or process
1162 * title for another process without groping around in the address space
1163 * of the other process. It also allow a process to set its own "process
1164 * title to a string of its own choice.
1167 sysctl_kern_proc_args(SYSCTL_HANDLER_ARGS)
1169 int *name = (int*) arg1;
1170 u_int namelen = arg2;
1171 struct pargs *newpa, *pa;
1178 p = pfind((pid_t)name[0]);
1182 if ((error = p_cansee(curthread, p)) != 0) {
1187 if (req->newptr && curproc != p) {
1195 if (req->oldptr != NULL && pa != NULL)
1196 error = SYSCTL_OUT(req, pa->ar_args, pa->ar_length);
1198 if (error != 0 || req->newptr == NULL)
1201 if (req->newlen + sizeof(struct pargs) > ps_arg_cache_limit)
1203 newpa = pargs_alloc(req->newlen);
1204 error = SYSCTL_IN(req, newpa->ar_args, req->newlen);
1218 * This sysctl allows a process to retrieve the path of the executable for
1219 * itself or another process.
1222 sysctl_kern_proc_pathname(SYSCTL_HANDLER_ARGS)
1224 pid_t *pidp = (pid_t *)arg1;
1225 unsigned int arglen = arg2;
1228 char *retbuf, *freebuf;
1233 if (*pidp == -1) { /* -1 means this process */
1234 p = req->td->td_proc;
1239 if ((error = p_cansee(curthread, p)) != 0) {
1254 error = vn_fullpath(req->td, vp, &retbuf, &freebuf);
1258 error = SYSCTL_OUT(req, retbuf, strlen(retbuf) + 1);
1259 free(freebuf, M_TEMP);
1264 sysctl_kern_proc_sv_name(SYSCTL_HANDLER_ARGS)
1277 if ((p = pfind((pid_t)name[0])) == NULL)
1279 if ((error = p_cansee(curthread, p))) {
1283 sv_name = p->p_sysent->sv_name;
1285 return (sysctl_handle_string(oidp, sv_name, 0, req));
1289 static SYSCTL_NODE(_kern, KERN_PROC, proc, CTLFLAG_RD, 0, "Process table");
1291 SYSCTL_PROC(_kern_proc, KERN_PROC_ALL, all, CTLFLAG_RD|CTLTYPE_STRUCT,
1292 0, 0, sysctl_kern_proc, "S,proc", "Return entire process table");
1294 static SYSCTL_NODE(_kern_proc, KERN_PROC_GID, gid, CTLFLAG_RD,
1295 sysctl_kern_proc, "Process table");
1297 static SYSCTL_NODE(_kern_proc, KERN_PROC_PGRP, pgrp, CTLFLAG_RD,
1298 sysctl_kern_proc, "Process table");
1300 static SYSCTL_NODE(_kern_proc, KERN_PROC_RGID, rgid, CTLFLAG_RD,
1301 sysctl_kern_proc, "Process table");
1303 static SYSCTL_NODE(_kern_proc, KERN_PROC_SESSION, sid, CTLFLAG_RD,
1304 sysctl_kern_proc, "Process table");
1306 static SYSCTL_NODE(_kern_proc, KERN_PROC_TTY, tty, CTLFLAG_RD,
1307 sysctl_kern_proc, "Process table");
1309 static SYSCTL_NODE(_kern_proc, KERN_PROC_UID, uid, CTLFLAG_RD,
1310 sysctl_kern_proc, "Process table");
1312 static SYSCTL_NODE(_kern_proc, KERN_PROC_RUID, ruid, CTLFLAG_RD,
1313 sysctl_kern_proc, "Process table");
1315 static SYSCTL_NODE(_kern_proc, KERN_PROC_PID, pid, CTLFLAG_RD,
1316 sysctl_kern_proc, "Process table");
1318 static SYSCTL_NODE(_kern_proc, KERN_PROC_PROC, proc, CTLFLAG_RD,
1319 sysctl_kern_proc, "Return process table, no threads");
1321 static SYSCTL_NODE(_kern_proc, KERN_PROC_ARGS, args,
1322 CTLFLAG_RW | CTLFLAG_ANYBODY,
1323 sysctl_kern_proc_args, "Process argument list");
1325 static SYSCTL_NODE(_kern_proc, KERN_PROC_PATHNAME, pathname, CTLFLAG_RD,
1326 sysctl_kern_proc_pathname, "Process executable path");
1328 static SYSCTL_NODE(_kern_proc, KERN_PROC_SV_NAME, sv_name, CTLFLAG_RD,
1329 sysctl_kern_proc_sv_name, "Process syscall vector name (ABI type)");
1331 static SYSCTL_NODE(_kern_proc, (KERN_PROC_GID | KERN_PROC_INC_THREAD), gid_td,
1332 CTLFLAG_RD, sysctl_kern_proc, "Process table");
1334 static SYSCTL_NODE(_kern_proc, (KERN_PROC_PGRP | KERN_PROC_INC_THREAD), pgrp_td,
1335 CTLFLAG_RD, sysctl_kern_proc, "Process table");
1337 static SYSCTL_NODE(_kern_proc, (KERN_PROC_RGID | KERN_PROC_INC_THREAD), rgid_td,
1338 CTLFLAG_RD, sysctl_kern_proc, "Process table");
1340 static SYSCTL_NODE(_kern_proc, (KERN_PROC_SESSION | KERN_PROC_INC_THREAD),
1341 sid_td, CTLFLAG_RD, sysctl_kern_proc, "Process table");
1343 static SYSCTL_NODE(_kern_proc, (KERN_PROC_TTY | KERN_PROC_INC_THREAD), tty_td,
1344 CTLFLAG_RD, sysctl_kern_proc, "Process table");
1346 static SYSCTL_NODE(_kern_proc, (KERN_PROC_UID | KERN_PROC_INC_THREAD), uid_td,
1347 CTLFLAG_RD, sysctl_kern_proc, "Process table");
1349 static SYSCTL_NODE(_kern_proc, (KERN_PROC_RUID | KERN_PROC_INC_THREAD), ruid_td,
1350 CTLFLAG_RD, sysctl_kern_proc, "Process table");
1352 static SYSCTL_NODE(_kern_proc, (KERN_PROC_PID | KERN_PROC_INC_THREAD), pid_td,
1353 CTLFLAG_RD, sysctl_kern_proc, "Process table");
1355 static SYSCTL_NODE(_kern_proc, (KERN_PROC_PROC | KERN_PROC_INC_THREAD), proc_td,
1356 CTLFLAG_RD, sysctl_kern_proc, "Return process table, no threads");