2 * Copyright (c) 1982, 1986, 1989, 1991, 1993
3 * The Regents of the University of California. All rights reserved.
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6 * modification, are permitted provided that the following conditions
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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/refcount.h>
47 #include <sys/sysent.h>
48 #include <sys/sched.h>
50 #include <sys/sysctl.h>
51 #include <sys/filedesc.h>
53 #include <sys/signalvar.h>
57 #include <sys/vnode.h>
60 #include <sys/ktrace.h>
64 #include <vm/vm_extern.h>
66 #include <vm/vm_map.h>
69 MALLOC_DEFINE(M_PGRP, "pgrp", "process group header");
70 MALLOC_DEFINE(M_SESSION, "session", "session header");
71 static MALLOC_DEFINE(M_PROC, "proc", "Proc structures");
72 MALLOC_DEFINE(M_SUBPROC, "subproc", "Proc sub-structures");
74 static void doenterpgrp(struct proc *, struct pgrp *);
75 static void orphanpg(struct pgrp *pg);
76 static void fill_kinfo_proc_only(struct proc *p, struct kinfo_proc *kp);
77 static void fill_kinfo_thread(struct thread *td, struct kinfo_proc *kp);
78 static void pgadjustjobc(struct pgrp *pgrp, int entering);
79 static void pgdelete(struct pgrp *);
80 static int proc_ctor(void *mem, int size, void *arg, int flags);
81 static void proc_dtor(void *mem, int size, void *arg);
82 static int proc_init(void *mem, int size, int flags);
83 static void proc_fini(void *mem, int size);
88 struct pidhashhead *pidhashtbl;
90 struct pgrphashhead *pgrphashtbl;
92 struct proclist allproc;
93 struct proclist zombproc;
94 struct sx allproc_lock;
95 struct sx proctree_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(&ppeers_lock, "p_peers", NULL, MTX_DEF);
116 LIST_INIT(&zombproc);
117 pidhashtbl = hashinit(maxproc / 4, M_PROC, &pidhash);
118 pgrphashtbl = hashinit(maxproc / 4, M_PROC, &pgrphash);
119 proc_zone = uma_zcreate("PROC", sched_sizeof_proc(),
120 proc_ctor, proc_dtor, proc_init, proc_fini,
121 UMA_ALIGN_PTR, UMA_ZONE_NOFREE);
126 * Prepare a proc for use.
129 proc_ctor(void *mem, int size, void *arg, int flags)
133 p = (struct proc *)mem;
138 * Reclaim a proc after use.
141 proc_dtor(void *mem, int size, void *arg)
149 /* INVARIANTS checks go here */
150 p = (struct proc *)mem;
151 td = FIRST_THREAD_IN_PROC(p);
153 KASSERT((p->p_numthreads == 1),
154 ("bad number of threads in exiting process"));
155 KASSERT((p->p_numksegrps == 1), ("free proc with > 1 ksegrp"));
156 KASSERT((td != NULL), ("proc_dtor: bad thread pointer"));
157 kg = FIRST_KSEGRP_IN_PROC(p);
158 KASSERT((kg != NULL), ("proc_dtor: bad kg pointer"));
159 KASSERT(STAILQ_EMPTY(&p->p_ktr), ("proc_dtor: non-empty p_ktr"));
162 /* Dispose of an alternate kstack, if it exists.
163 * XXX What if there are more than one thread in the proc?
164 * The first thread in the proc is special and not
165 * freed, so you gotta do this here.
167 if (((p->p_flag & P_KTHREAD) != 0) && (td->td_altkstack != 0))
168 vm_thread_dispose_altkstack(td);
169 if (p->p_ksi != NULL)
170 KASSERT(! KSI_ONQ(p->p_ksi), ("SIGCHLD queue"));
174 * Initialize type-stable parts of a proc (when newly created).
177 proc_init(void *mem, int size, int flags)
183 p = (struct proc *)mem;
184 p->p_sched = (struct p_sched *)&p[1];
187 bzero(&p->p_mtx, sizeof(struct mtx));
188 mtx_init(&p->p_mtx, "process lock", NULL, MTX_DEF | MTX_DUPOK);
189 p->p_stats = pstats_alloc();
190 proc_linkup(p, kg, td);
191 sched_newproc(p, kg, td);
196 * UMA should ensure that this function is never called.
197 * Freeing a proc structure would violate type stability.
200 proc_fini(void *mem, int size)
205 p = (struct proc *)mem;
206 pstats_free(p->p_stats);
207 ksegrp_free(FIRST_KSEGRP_IN_PROC(p));
208 thread_free(FIRST_THREAD_IN_PROC(p));
209 mtx_destroy(&p->p_mtx);
210 if (p->p_ksi != NULL)
211 ksiginfo_free(p->p_ksi);
213 panic("proc reclaimed");
218 * Is p an inferior of the current process?
222 register struct proc *p;
225 sx_assert(&proctree_lock, SX_LOCKED);
226 for (; p != curproc; p = p->p_pptr)
233 * Locate a process by number; return only "live" processes -- i.e., neither
234 * zombies nor newly born but incompletely initialized processes. By not
235 * returning processes in the PRS_NEW state, we allow callers to avoid
236 * testing for that condition to avoid dereferencing p_ucred, et al.
242 register struct proc *p;
244 sx_slock(&allproc_lock);
245 LIST_FOREACH(p, PIDHASH(pid), p_hash)
246 if (p->p_pid == pid) {
247 if (p->p_state == PRS_NEW) {
254 sx_sunlock(&allproc_lock);
259 * Locate a process group by number.
260 * The caller must hold proctree_lock.
266 register struct pgrp *pgrp;
268 sx_assert(&proctree_lock, SX_LOCKED);
270 LIST_FOREACH(pgrp, PGRPHASH(pgid), pg_hash) {
271 if (pgrp->pg_id == pgid) {
280 * Create a new process group.
281 * pgid must be equal to the pid of p.
282 * Begin a new session if required.
285 enterpgrp(p, pgid, pgrp, sess)
286 register struct proc *p;
289 struct session *sess;
293 sx_assert(&proctree_lock, SX_XLOCKED);
295 KASSERT(pgrp != NULL, ("enterpgrp: pgrp == NULL"));
296 KASSERT(p->p_pid == pgid,
297 ("enterpgrp: new pgrp and pid != pgid"));
299 pgrp2 = pgfind(pgid);
301 KASSERT(pgrp2 == NULL,
302 ("enterpgrp: pgrp with pgid exists"));
303 KASSERT(!SESS_LEADER(p),
304 ("enterpgrp: session leader attempted setpgrp"));
306 mtx_init(&pgrp->pg_mtx, "process group", NULL, MTX_DEF | MTX_DUPOK);
312 mtx_init(&sess->s_mtx, "session", NULL, MTX_DEF);
314 p->p_flag &= ~P_CONTROLT;
318 sess->s_sid = p->p_pid;
320 sess->s_ttyvp = NULL;
322 bcopy(p->p_session->s_login, sess->s_login,
323 sizeof(sess->s_login));
324 pgrp->pg_session = sess;
325 KASSERT(p == curproc,
326 ("enterpgrp: mksession and p != curproc"));
328 pgrp->pg_session = p->p_session;
329 SESS_LOCK(pgrp->pg_session);
330 pgrp->pg_session->s_count++;
331 SESS_UNLOCK(pgrp->pg_session);
335 LIST_INIT(&pgrp->pg_members);
338 * As we have an exclusive lock of proctree_lock,
339 * this should not deadlock.
341 LIST_INSERT_HEAD(PGRPHASH(pgid), pgrp, pg_hash);
343 SLIST_INIT(&pgrp->pg_sigiolst);
346 doenterpgrp(p, pgrp);
352 * Move p to an existing process group
355 enterthispgrp(p, pgrp)
356 register struct proc *p;
360 sx_assert(&proctree_lock, SX_XLOCKED);
361 PROC_LOCK_ASSERT(p, MA_NOTOWNED);
362 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
363 PGRP_LOCK_ASSERT(p->p_pgrp, MA_NOTOWNED);
364 SESS_LOCK_ASSERT(p->p_session, MA_NOTOWNED);
365 KASSERT(pgrp->pg_session == p->p_session,
366 ("%s: pgrp's session %p, p->p_session %p.\n",
370 KASSERT(pgrp != p->p_pgrp,
371 ("%s: p belongs to pgrp.", __func__));
373 doenterpgrp(p, pgrp);
379 * Move p to a process group
386 struct pgrp *savepgrp;
388 sx_assert(&proctree_lock, SX_XLOCKED);
389 PROC_LOCK_ASSERT(p, MA_NOTOWNED);
390 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
391 PGRP_LOCK_ASSERT(p->p_pgrp, MA_NOTOWNED);
392 SESS_LOCK_ASSERT(p->p_session, MA_NOTOWNED);
394 savepgrp = p->p_pgrp;
397 * Adjust eligibility of affected pgrps to participate in job control.
398 * Increment eligibility counts before decrementing, otherwise we
399 * could reach 0 spuriously during the first call.
402 fixjobc(p, p->p_pgrp, 0);
407 LIST_REMOVE(p, p_pglist);
410 LIST_INSERT_HEAD(&pgrp->pg_members, p, p_pglist);
411 PGRP_UNLOCK(savepgrp);
413 if (LIST_EMPTY(&savepgrp->pg_members))
418 * remove process from process group
422 register struct proc *p;
424 struct pgrp *savepgrp;
426 sx_assert(&proctree_lock, SX_XLOCKED);
427 savepgrp = p->p_pgrp;
430 LIST_REMOVE(p, p_pglist);
433 PGRP_UNLOCK(savepgrp);
434 if (LIST_EMPTY(&savepgrp->pg_members))
440 * delete a process group
444 register struct pgrp *pgrp;
446 struct session *savesess;
448 sx_assert(&proctree_lock, SX_XLOCKED);
449 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
450 SESS_LOCK_ASSERT(pgrp->pg_session, MA_NOTOWNED);
453 * Reset any sigio structures pointing to us as a result of
454 * F_SETOWN with our pgid.
456 funsetownlst(&pgrp->pg_sigiolst);
459 if (pgrp->pg_session->s_ttyp != NULL &&
460 pgrp->pg_session->s_ttyp->t_pgrp == pgrp)
461 pgrp->pg_session->s_ttyp->t_pgrp = NULL;
462 LIST_REMOVE(pgrp, pg_hash);
463 savesess = pgrp->pg_session;
466 mtx_destroy(&pgrp->pg_mtx);
471 pgadjustjobc(pgrp, entering)
481 if (pgrp->pg_jobc == 0)
488 * Adjust pgrp jobc counters when specified process changes process group.
489 * We count the number of processes in each process group that "qualify"
490 * the group for terminal job control (those with a parent in a different
491 * process group of the same session). If that count reaches zero, the
492 * process group becomes orphaned. Check both the specified process'
493 * process group and that of its children.
494 * entering == 0 => p is leaving specified group.
495 * entering == 1 => p is entering specified group.
498 fixjobc(p, pgrp, entering)
499 register struct proc *p;
500 register struct pgrp *pgrp;
503 register struct pgrp *hispgrp;
504 register struct session *mysession;
506 sx_assert(&proctree_lock, SX_LOCKED);
507 PROC_LOCK_ASSERT(p, MA_NOTOWNED);
508 PGRP_LOCK_ASSERT(pgrp, MA_NOTOWNED);
509 SESS_LOCK_ASSERT(pgrp->pg_session, MA_NOTOWNED);
512 * Check p's parent to see whether p qualifies its own process
513 * group; if so, adjust count for p's process group.
515 mysession = pgrp->pg_session;
516 if ((hispgrp = p->p_pptr->p_pgrp) != pgrp &&
517 hispgrp->pg_session == mysession)
518 pgadjustjobc(pgrp, entering);
521 * Check this process' children to see whether they qualify
522 * their process groups; if so, adjust counts for children's
525 LIST_FOREACH(p, &p->p_children, p_sibling) {
527 if (hispgrp == pgrp ||
528 hispgrp->pg_session != mysession)
531 if (p->p_state == PRS_ZOMBIE) {
536 pgadjustjobc(hispgrp, entering);
541 * A process group has become orphaned;
542 * if there are any stopped processes in the group,
543 * hang-up all process in that group.
549 register struct proc *p;
551 PGRP_LOCK_ASSERT(pg, MA_OWNED);
553 LIST_FOREACH(p, &pg->pg_members, p_pglist) {
555 if (P_SHOULDSTOP(p)) {
557 LIST_FOREACH(p, &pg->pg_members, p_pglist) {
570 sessrele(struct session *s)
578 if (s->s_ttyp != NULL)
580 mtx_destroy(&s->s_mtx);
589 DB_SHOW_COMMAND(pgrpdump, pgrpdump)
591 register struct pgrp *pgrp;
592 register struct proc *p;
595 for (i = 0; i <= pgrphash; i++) {
596 if (!LIST_EMPTY(&pgrphashtbl[i])) {
597 printf("\tindx %d\n", i);
598 LIST_FOREACH(pgrp, &pgrphashtbl[i], pg_hash) {
600 "\tpgrp %p, pgid %ld, sess %p, sesscnt %d, mem %p\n",
601 (void *)pgrp, (long)pgrp->pg_id,
602 (void *)pgrp->pg_session,
603 pgrp->pg_session->s_count,
604 (void *)LIST_FIRST(&pgrp->pg_members));
605 LIST_FOREACH(p, &pgrp->pg_members, p_pglist) {
606 printf("\t\tpid %ld addr %p pgrp %p\n",
607 (long)p->p_pid, (void *)p,
617 * Clear kinfo_proc and fill in any information that is common
618 * to all threads in the process.
619 * Must be called with the target process locked.
622 fill_kinfo_proc_only(struct proc *p, struct kinfo_proc *kp)
630 bzero(kp, sizeof(*kp));
632 kp->ki_structsize = sizeof(*kp);
634 PROC_LOCK_ASSERT(p, MA_OWNED);
635 kp->ki_addr =/* p->p_addr; */0; /* XXXKSE */
636 kp->ki_args = p->p_args;
637 kp->ki_textvp = p->p_textvp;
639 kp->ki_tracep = p->p_tracevp;
640 mtx_lock(&ktrace_mtx);
641 kp->ki_traceflag = p->p_traceflag;
642 mtx_unlock(&ktrace_mtx);
645 kp->ki_vmspace = p->p_vmspace;
646 kp->ki_flag = p->p_flag;
649 kp->ki_uid = cred->cr_uid;
650 kp->ki_ruid = cred->cr_ruid;
651 kp->ki_svuid = cred->cr_svuid;
652 /* XXX bde doesn't like KI_NGROUPS */
653 kp->ki_ngroups = min(cred->cr_ngroups, KI_NGROUPS);
654 bcopy(cred->cr_groups, kp->ki_groups,
655 kp->ki_ngroups * sizeof(gid_t));
656 kp->ki_rgid = cred->cr_rgid;
657 kp->ki_svgid = cred->cr_svgid;
658 /* If jailed(cred), emulate the old P_JAILED flag. */
660 kp->ki_flag |= P_JAILED;
661 /* If inside a jail, use 0 as a jail ID. */
662 if (!jailed(curthread->td_ucred))
663 kp->ki_jid = cred->cr_prison->pr_id;
668 mtx_lock(&ps->ps_mtx);
669 kp->ki_sigignore = ps->ps_sigignore;
670 kp->ki_sigcatch = ps->ps_sigcatch;
671 mtx_unlock(&ps->ps_mtx);
673 mtx_lock_spin(&sched_lock);
674 if (p->p_state != PRS_NEW &&
675 p->p_state != PRS_ZOMBIE &&
676 p->p_vmspace != NULL) {
677 struct vmspace *vm = p->p_vmspace;
679 kp->ki_size = vm->vm_map.size;
680 kp->ki_rssize = vmspace_resident_count(vm); /*XXX*/
681 FOREACH_THREAD_IN_PROC(p, td0) {
682 if (!TD_IS_SWAPPED(td0))
683 kp->ki_rssize += td0->td_kstack_pages;
684 if (td0->td_altkstack_obj != NULL)
685 kp->ki_rssize += td0->td_altkstack_pages;
687 kp->ki_swrss = vm->vm_swrss;
688 kp->ki_tsize = vm->vm_tsize;
689 kp->ki_dsize = vm->vm_dsize;
690 kp->ki_ssize = vm->vm_ssize;
691 } else if (p->p_state == PRS_ZOMBIE)
693 kp->ki_sflag = p->p_sflag;
694 kp->ki_swtime = p->p_swtime;
695 kp->ki_pid = p->p_pid;
696 kp->ki_nice = p->p_nice;
697 kp->ki_runtime = cputick2usec(p->p_rux.rux_runtime);
698 mtx_unlock_spin(&sched_lock);
699 if ((p->p_sflag & PS_INMEM) && p->p_stats != NULL) {
700 kp->ki_start = p->p_stats->p_start;
701 timevaladd(&kp->ki_start, &boottime);
702 kp->ki_rusage = p->p_stats->p_ru;
703 calcru(p, &kp->ki_rusage.ru_utime, &kp->ki_rusage.ru_stime);
704 calccru(p, &kp->ki_childutime, &kp->ki_childstime);
706 /* Some callers want child-times in a single value */
707 kp->ki_childtime = kp->ki_childstime;
708 timevaladd(&kp->ki_childtime, &kp->ki_childutime);
712 kp->ki_pgid = p->p_pgrp->pg_id;
713 kp->ki_jobc = p->p_pgrp->pg_jobc;
714 sp = p->p_pgrp->pg_session;
717 kp->ki_sid = sp->s_sid;
719 strlcpy(kp->ki_login, sp->s_login,
720 sizeof(kp->ki_login));
722 kp->ki_kiflag |= KI_CTTY;
724 kp->ki_kiflag |= KI_SLEADER;
729 if ((p->p_flag & P_CONTROLT) && tp != NULL) {
730 kp->ki_tdev = dev2udev(tp->t_dev);
731 kp->ki_tpgid = tp->t_pgrp ? tp->t_pgrp->pg_id : NO_PID;
733 kp->ki_tsid = tp->t_session->s_sid;
736 if (p->p_comm[0] != '\0') {
737 strlcpy(kp->ki_comm, p->p_comm, sizeof(kp->ki_comm));
739 * Temporarily give the thread a default name of the process
740 * as it's erroneously used in the snmp code.
741 * Remove this when that is fixed. (soon I'm told)
743 strlcpy(kp->ki_ocomm, p->p_comm, sizeof(kp->ki_ocomm));
745 if (p->p_sysent && p->p_sysent->sv_name != NULL &&
746 p->p_sysent->sv_name[0] != '\0')
747 strlcpy(kp->ki_emul, p->p_sysent->sv_name, sizeof(kp->ki_emul));
748 kp->ki_siglist = p->p_siglist;
749 kp->ki_xstat = p->p_xstat;
750 kp->ki_acflag = p->p_acflag;
751 kp->ki_lock = p->p_lock;
753 kp->ki_ppid = p->p_pptr->p_pid;
757 * Fill in information that is thread specific.
758 * Must be called with sched_lock locked.
761 fill_kinfo_thread(struct thread *td, struct kinfo_proc *kp)
768 if (td->td_wmesg != NULL)
769 strlcpy(kp->ki_wmesg, td->td_wmesg, sizeof(kp->ki_wmesg));
771 bzero(kp->ki_wmesg, sizeof(kp->ki_wmesg));
772 if (td->td_name[0] != '\0')
773 strlcpy(kp->ki_ocomm, td->td_name, sizeof(kp->ki_ocomm));
774 if (TD_ON_LOCK(td)) {
775 kp->ki_kiflag |= KI_LOCKBLOCK;
776 strlcpy(kp->ki_lockname, td->td_lockname,
777 sizeof(kp->ki_lockname));
779 kp->ki_kiflag &= ~KI_LOCKBLOCK;
780 bzero(kp->ki_lockname, sizeof(kp->ki_lockname));
783 if (p->p_state == PRS_NORMAL) { /* XXXKSE very approximate */
784 if (TD_ON_RUNQ(td) ||
788 } else if (P_SHOULDSTOP(p)) {
790 } else if (TD_IS_SLEEPING(td)) {
791 kp->ki_stat = SSLEEP;
792 } else if (TD_ON_LOCK(td)) {
797 } else if (p->p_state == PRS_ZOMBIE) {
805 /* things in the KSE GROUP */
806 kp->ki_estcpu = kg->kg_estcpu;
807 kp->ki_slptime = kg->kg_slptime;
808 kp->ki_pri.pri_user = kg->kg_user_pri;
809 kp->ki_pri.pri_class = kg->kg_pri_class;
811 /* Things in the thread */
812 kp->ki_wchan = td->td_wchan;
813 kp->ki_pri.pri_level = td->td_priority;
814 kp->ki_pri.pri_native = td->td_base_pri;
815 kp->ki_lastcpu = td->td_lastcpu;
816 kp->ki_oncpu = td->td_oncpu;
817 kp->ki_tdflags = td->td_flags;
818 kp->ki_tid = td->td_tid;
819 kp->ki_numthreads = p->p_numthreads;
820 kp->ki_pcb = td->td_pcb;
821 kp->ki_kstack = (void *)td->td_kstack;
822 kp->ki_pctcpu = sched_pctcpu(td);
824 /* We can't get this anymore but ps etc never used it anyway. */
827 SIGSETOR(kp->ki_siglist, td->td_siglist);
828 kp->ki_sigmask = td->td_sigmask;
832 * Fill in a kinfo_proc structure for the specified process.
833 * Must be called with the target process locked.
836 fill_kinfo_proc(struct proc *p, struct kinfo_proc *kp)
839 fill_kinfo_proc_only(p, kp);
840 mtx_lock_spin(&sched_lock);
841 if (FIRST_THREAD_IN_PROC(p) != NULL)
842 fill_kinfo_thread(FIRST_THREAD_IN_PROC(p), kp);
843 mtx_unlock_spin(&sched_lock);
850 return (malloc(sizeof(struct pstats), M_SUBPROC, M_ZERO|M_WAITOK));
854 * Copy parts of p_stats; zero the rest of p_stats (statistics).
857 pstats_fork(struct pstats *src, struct pstats *dst)
860 bzero(&dst->pstat_startzero,
861 __rangeof(struct pstats, pstat_startzero, pstat_endzero));
862 bcopy(&src->pstat_startcopy, &dst->pstat_startcopy,
863 __rangeof(struct pstats, pstat_startcopy, pstat_endcopy));
867 pstats_free(struct pstats *ps)
874 * Locate a zombie process by number
881 sx_slock(&allproc_lock);
882 LIST_FOREACH(p, &zombproc, p_list)
883 if (p->p_pid == pid) {
887 sx_sunlock(&allproc_lock);
891 #define KERN_PROC_ZOMBMASK 0x3
892 #define KERN_PROC_NOTHREADS 0x4
895 * Must be called with the process locked and will return with it unlocked.
898 sysctl_out_proc(struct proc *p, struct sysctl_req *req, int flags)
901 struct kinfo_proc kinfo_proc;
904 pid_t pid = p->p_pid;
906 PROC_LOCK_ASSERT(p, MA_OWNED);
908 fill_kinfo_proc_only(p, &kinfo_proc);
909 if (flags & KERN_PROC_NOTHREADS) {
910 mtx_lock_spin(&sched_lock);
911 if (FIRST_THREAD_IN_PROC(p) != NULL)
912 fill_kinfo_thread(FIRST_THREAD_IN_PROC(p), &kinfo_proc);
913 mtx_unlock_spin(&sched_lock);
914 error = SYSCTL_OUT(req, (caddr_t)&kinfo_proc,
917 mtx_lock_spin(&sched_lock);
918 if (FIRST_THREAD_IN_PROC(p) != NULL)
919 FOREACH_THREAD_IN_PROC(p, td) {
920 fill_kinfo_thread(td, &kinfo_proc);
921 error = SYSCTL_OUT(req, (caddr_t)&kinfo_proc,
927 error = SYSCTL_OUT(req, (caddr_t)&kinfo_proc,
929 mtx_unlock_spin(&sched_lock);
934 if (flags & KERN_PROC_ZOMBMASK)
952 sysctl_kern_proc(SYSCTL_HANDLER_ARGS)
954 int *name = (int*) arg1;
955 u_int namelen = arg2;
957 int flags, doingzomb, oid_number;
960 oid_number = oidp->oid_number;
961 if (oid_number != KERN_PROC_ALL &&
962 (oid_number & KERN_PROC_INC_THREAD) == 0)
963 flags = KERN_PROC_NOTHREADS;
966 oid_number &= ~KERN_PROC_INC_THREAD;
968 if (oid_number == KERN_PROC_PID) {
971 error = sysctl_wire_old_buffer(req, 0);
974 p = pfind((pid_t)name[0]);
977 if ((error = p_cansee(curthread, p))) {
981 error = sysctl_out_proc(p, req, flags);
985 switch (oid_number) {
991 if (namelen != 0 && namelen != 1)
1001 /* overestimate by 5 procs */
1002 error = SYSCTL_OUT(req, 0, sizeof (struct kinfo_proc) * 5);
1006 error = sysctl_wire_old_buffer(req, 0);
1009 sx_slock(&allproc_lock);
1010 for (doingzomb=0 ; doingzomb < 2 ; doingzomb++) {
1012 p = LIST_FIRST(&allproc);
1014 p = LIST_FIRST(&zombproc);
1015 for (; p != 0; p = LIST_NEXT(p, p_list)) {
1017 * Skip embryonic processes.
1019 mtx_lock_spin(&sched_lock);
1020 if (p->p_state == PRS_NEW) {
1021 mtx_unlock_spin(&sched_lock);
1024 mtx_unlock_spin(&sched_lock);
1026 KASSERT(p->p_ucred != NULL,
1027 ("process credential is NULL for non-NEW proc"));
1029 * Show a user only appropriate processes.
1031 if (p_cansee(curthread, p)) {
1036 * TODO - make more efficient (see notes below).
1039 switch (oid_number) {
1042 if (p->p_ucred->cr_gid != (gid_t)name[0]) {
1048 case KERN_PROC_PGRP:
1049 /* could do this by traversing pgrp */
1050 if (p->p_pgrp == NULL ||
1051 p->p_pgrp->pg_id != (pid_t)name[0]) {
1057 case KERN_PROC_RGID:
1058 if (p->p_ucred->cr_rgid != (gid_t)name[0]) {
1064 case KERN_PROC_SESSION:
1065 if (p->p_session == NULL ||
1066 p->p_session->s_sid != (pid_t)name[0]) {
1073 if ((p->p_flag & P_CONTROLT) == 0 ||
1074 p->p_session == NULL) {
1078 SESS_LOCK(p->p_session);
1079 if (p->p_session->s_ttyp == NULL ||
1080 dev2udev(p->p_session->s_ttyp->t_dev) !=
1082 SESS_UNLOCK(p->p_session);
1086 SESS_UNLOCK(p->p_session);
1090 if (p->p_ucred->cr_uid != (uid_t)name[0]) {
1096 case KERN_PROC_RUID:
1097 if (p->p_ucred->cr_ruid != (uid_t)name[0]) {
1103 case KERN_PROC_PROC:
1111 error = sysctl_out_proc(p, req, flags | doingzomb);
1113 sx_sunlock(&allproc_lock);
1118 sx_sunlock(&allproc_lock);
1123 pargs_alloc(int len)
1127 MALLOC(pa, struct pargs *, sizeof(struct pargs) + len, M_PARGS,
1129 refcount_init(&pa->ar_ref, 1);
1130 pa->ar_length = len;
1135 pargs_free(struct pargs *pa)
1142 pargs_hold(struct pargs *pa)
1147 refcount_acquire(&pa->ar_ref);
1151 pargs_drop(struct pargs *pa)
1156 if (refcount_release(&pa->ar_ref))
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) {
1249 error = vn_fullpath(req->td, vp, &retbuf, &freebuf);
1253 error = SYSCTL_OUT(req, retbuf, strlen(retbuf) + 1);
1254 free(freebuf, M_TEMP);
1259 sysctl_kern_proc_sv_name(SYSCTL_HANDLER_ARGS)
1272 if ((p = pfind((pid_t)name[0])) == NULL)
1274 if ((error = p_cansee(curthread, p))) {
1278 sv_name = p->p_sysent->sv_name;
1280 return (sysctl_handle_string(oidp, sv_name, 0, req));
1284 static SYSCTL_NODE(_kern, KERN_PROC, proc, CTLFLAG_RD, 0, "Process table");
1286 SYSCTL_PROC(_kern_proc, KERN_PROC_ALL, all, CTLFLAG_RD|CTLTYPE_STRUCT,
1287 0, 0, sysctl_kern_proc, "S,proc", "Return entire process table");
1289 static SYSCTL_NODE(_kern_proc, KERN_PROC_GID, gid, CTLFLAG_RD,
1290 sysctl_kern_proc, "Process table");
1292 static SYSCTL_NODE(_kern_proc, KERN_PROC_PGRP, pgrp, CTLFLAG_RD,
1293 sysctl_kern_proc, "Process table");
1295 static SYSCTL_NODE(_kern_proc, KERN_PROC_RGID, rgid, CTLFLAG_RD,
1296 sysctl_kern_proc, "Process table");
1298 static SYSCTL_NODE(_kern_proc, KERN_PROC_SESSION, sid, CTLFLAG_RD,
1299 sysctl_kern_proc, "Process table");
1301 static SYSCTL_NODE(_kern_proc, KERN_PROC_TTY, tty, CTLFLAG_RD,
1302 sysctl_kern_proc, "Process table");
1304 static SYSCTL_NODE(_kern_proc, KERN_PROC_UID, uid, CTLFLAG_RD,
1305 sysctl_kern_proc, "Process table");
1307 static SYSCTL_NODE(_kern_proc, KERN_PROC_RUID, ruid, CTLFLAG_RD,
1308 sysctl_kern_proc, "Process table");
1310 static SYSCTL_NODE(_kern_proc, KERN_PROC_PID, pid, CTLFLAG_RD,
1311 sysctl_kern_proc, "Process table");
1313 static SYSCTL_NODE(_kern_proc, KERN_PROC_PROC, proc, CTLFLAG_RD,
1314 sysctl_kern_proc, "Return process table, no threads");
1316 static SYSCTL_NODE(_kern_proc, KERN_PROC_ARGS, args,
1317 CTLFLAG_RW | CTLFLAG_ANYBODY,
1318 sysctl_kern_proc_args, "Process argument list");
1320 static SYSCTL_NODE(_kern_proc, KERN_PROC_PATHNAME, pathname, CTLFLAG_RD,
1321 sysctl_kern_proc_pathname, "Process executable path");
1323 static SYSCTL_NODE(_kern_proc, KERN_PROC_SV_NAME, sv_name, CTLFLAG_RD,
1324 sysctl_kern_proc_sv_name, "Process syscall vector name (ABI type)");
1326 static SYSCTL_NODE(_kern_proc, (KERN_PROC_GID | KERN_PROC_INC_THREAD), gid_td,
1327 CTLFLAG_RD, sysctl_kern_proc, "Process table");
1329 static SYSCTL_NODE(_kern_proc, (KERN_PROC_PGRP | KERN_PROC_INC_THREAD), pgrp_td,
1330 CTLFLAG_RD, sysctl_kern_proc, "Process table");
1332 static SYSCTL_NODE(_kern_proc, (KERN_PROC_RGID | KERN_PROC_INC_THREAD), rgid_td,
1333 CTLFLAG_RD, sysctl_kern_proc, "Process table");
1335 static SYSCTL_NODE(_kern_proc, (KERN_PROC_SESSION | KERN_PROC_INC_THREAD),
1336 sid_td, CTLFLAG_RD, sysctl_kern_proc, "Process table");
1338 static SYSCTL_NODE(_kern_proc, (KERN_PROC_TTY | KERN_PROC_INC_THREAD), tty_td,
1339 CTLFLAG_RD, sysctl_kern_proc, "Process table");
1341 static SYSCTL_NODE(_kern_proc, (KERN_PROC_UID | KERN_PROC_INC_THREAD), uid_td,
1342 CTLFLAG_RD, sysctl_kern_proc, "Process table");
1344 static SYSCTL_NODE(_kern_proc, (KERN_PROC_RUID | KERN_PROC_INC_THREAD), ruid_td,
1345 CTLFLAG_RD, sysctl_kern_proc, "Process table");
1347 static SYSCTL_NODE(_kern_proc, (KERN_PROC_PID | KERN_PROC_INC_THREAD), pid_td,
1348 CTLFLAG_RD, sysctl_kern_proc, "Process table");
1350 static SYSCTL_NODE(_kern_proc, (KERN_PROC_PROC | KERN_PROC_INC_THREAD), proc_td,
1351 CTLFLAG_RD, sysctl_kern_proc, "Return process table, no threads");