2 * Copyright (c) 1993, 1995 Jan-Simon Pendry
3 * Copyright (c) 1993, 1995
4 * The Regents of the University of California. All rights reserved.
6 * This code is derived from software contributed to Berkeley by
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed by the University of
20 * California, Berkeley and its contributors.
21 * 4. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 * @(#)procfs_vnops.c 8.18 (Berkeley) 5/21/95
39 * $FreeBSD: src/sys/miscfs/procfs/procfs_vnops.c,v 1.76.2.7 2002/01/22 17:22:59 nectar Exp $
40 * $DragonFly: src/sys/vfs/procfs/procfs_vnops.c,v 1.19 2004/08/28 19:02:27 dillon Exp $
44 * procfs vnode interface
47 #include <sys/param.h>
48 #include <sys/systm.h>
50 #include <sys/kernel.h>
52 #include <sys/fcntl.h>
54 #include <sys/signalvar.h>
55 #include <sys/vnode.h>
57 #include <sys/mount.h>
58 #include <sys/namei.h>
59 #include <sys/dirent.h>
60 #include <sys/malloc.h>
61 #include <machine/reg.h>
62 #include <vm/vm_zone.h>
63 #include <vfs/procfs/procfs.h>
64 #include <sys/pioctl.h>
66 static int procfs_access (struct vop_access_args *);
67 static int procfs_badop (void);
68 static int procfs_bmap (struct vop_bmap_args *);
69 static int procfs_close (struct vop_close_args *);
70 static int procfs_getattr (struct vop_getattr_args *);
71 static int procfs_inactive (struct vop_inactive_args *);
72 static int procfs_ioctl (struct vop_ioctl_args *);
73 static int procfs_lookup (struct vop_lookup_args *);
74 static int procfs_open (struct vop_open_args *);
75 static int procfs_print (struct vop_print_args *);
76 static int procfs_readdir (struct vop_readdir_args *);
77 static int procfs_readlink (struct vop_readlink_args *);
78 static int procfs_reclaim (struct vop_reclaim_args *);
79 static int procfs_setattr (struct vop_setattr_args *);
82 * This is a list of the valid names in the
83 * process-specific sub-directories. It is
84 * used in procfs_lookup and procfs_readdir
86 static struct proc_target {
91 int (*pt_valid) (struct proc *p);
93 #define N(s) sizeof(s)-1, s
94 /* name type validp */
95 { DT_DIR, N("."), Pproc, NULL },
96 { DT_DIR, N(".."), Proot, NULL },
97 { DT_REG, N("mem"), Pmem, NULL },
98 { DT_REG, N("regs"), Pregs, procfs_validregs },
99 { DT_REG, N("fpregs"), Pfpregs, procfs_validfpregs },
100 { DT_REG, N("dbregs"), Pdbregs, procfs_validdbregs },
101 { DT_REG, N("ctl"), Pctl, NULL },
102 { DT_REG, N("status"), Pstatus, NULL },
103 { DT_REG, N("note"), Pnote, NULL },
104 { DT_REG, N("notepg"), Pnotepg, NULL },
105 { DT_REG, N("map"), Pmap, procfs_validmap },
106 { DT_REG, N("etype"), Ptype, procfs_validtype },
107 { DT_REG, N("cmdline"), Pcmdline, NULL },
108 { DT_REG, N("rlimit"), Prlimit, NULL },
109 { DT_LNK, N("file"), Pfile, NULL },
112 static const int nproc_targets = sizeof(proc_targets) / sizeof(proc_targets[0]);
114 static pid_t atopid (const char *, u_int);
117 * set things up for doing i/o on
118 * the pfsnode (vp). (vp) is locked
119 * on entry, and should be left locked
122 * for procfs we don't need to do anything
123 * in particular for i/o. all that is done
124 * is to support exclusive open on process
127 * procfs_open(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
128 * struct thread *a_td)
131 procfs_open(struct vop_open_args *ap)
133 struct pfsnode *pfs = VTOPFS(ap->a_vp);
134 struct proc *p1, *p2;
136 p2 = PFIND(pfs->pfs_pid);
139 if (pfs->pfs_pid && !PRISON_CHECK(ap->a_cred, p2->p_ucred))
142 switch (pfs->pfs_type) {
144 if (((pfs->pfs_flags & FWRITE) && (ap->a_mode & O_EXCL)) ||
145 ((pfs->pfs_flags & O_EXCL) && (ap->a_mode & FWRITE)))
148 p1 = ap->a_td->td_proc;
150 /* Can't trace a process that's currently exec'ing. */
151 if ((p2->p_flag & P_INEXEC) != 0)
153 if (!CHECKIO(p1, p2) || p_trespass(ap->a_cred, p2->p_ucred))
156 if (ap->a_mode & FWRITE)
157 pfs->pfs_flags = ap->a_mode & (FWRITE|O_EXCL);
169 * close the pfsnode (vp) after doing i/o.
170 * (vp) is not locked on entry or exit.
172 * nothing to do for procfs other than undo
173 * any exclusive open flag (see _open above).
175 * procfs_close(struct vnode *a_vp, int a_fflag, struct ucred *a_cred,
176 * struct thread *a_td)
179 procfs_close(struct vop_close_args *ap)
181 struct pfsnode *pfs = VTOPFS(ap->a_vp);
184 switch (pfs->pfs_type) {
186 if ((ap->a_fflag & FWRITE) && (pfs->pfs_flags & O_EXCL))
187 pfs->pfs_flags &= ~(FWRITE|O_EXCL);
189 * This rather complicated-looking code is trying to
190 * determine if this was the last close on this particular
191 * vnode. While one would expect v_usecount to be 1 at
192 * that point, it seems that (according to John Dyson)
193 * the VM system will bump up the usecount. So: if the
194 * usecount is 2, and VOBJBUF is set, then this is really
195 * the last close. Otherwise, if the usecount is < 2
196 * then it is definitely the last close.
197 * If this is the last close, then it checks to see if
198 * the target process has PF_LINGER set in p_pfsflags,
199 * if this is *not* the case, then the process' stop flags
200 * are cleared, and the process is woken up. This is
201 * to help prevent the case where a process has been
202 * told to stop on an event, but then the requesting process
203 * has gone away or forgotten about it.
205 if ((ap->a_vp->v_usecount < 2)
206 && (p = pfind(pfs->pfs_pid))
207 && !(p->p_pfsflags & PF_LINGER)) {
221 * do an ioctl operation on a pfsnode (vp).
222 * (vp) is not locked on entry or exit.
225 procfs_ioctl(struct vop_ioctl_args *ap)
227 struct pfsnode *pfs = VTOPFS(ap->a_vp);
232 struct procfs_status *psp;
235 procp = pfind(pfs->pfs_pid);
238 p = ap->a_td->td_proc;
242 /* Can't trace a process that's currently exec'ing. */
243 if ((procp->p_flag & P_INEXEC) != 0)
245 if (!CHECKIO(p, procp) || p_trespass(ap->a_cred, procp->p_ucred))
248 switch (ap->a_command) {
250 procp->p_stops |= *(unsigned int*)ap->a_data;
253 procp->p_stops &= ~*(unsigned int*)ap->a_data;
257 * NFLAGS is "non-suser_xxx flags" -- currently, only
258 * PFS_ISUGID ("ignore set u/g id");
260 #define NFLAGS (PF_ISUGID)
261 flags = (unsigned char)*(unsigned int*)ap->a_data;
262 if (flags & NFLAGS && (error = suser_cred(ap->a_cred, 0)))
264 procp->p_pfsflags = flags;
267 *(unsigned int*)ap->a_data = (unsigned int)procp->p_pfsflags;
270 psp = (struct procfs_status *)ap->a_data;
271 psp->state = (procp->p_step == 0);
272 psp->flags = procp->p_pfsflags;
273 psp->events = procp->p_stops;
275 psp->why = procp->p_stype;
276 psp->val = procp->p_xstat;
278 psp->why = psp->val = 0; /* Not defined values */
282 psp = (struct procfs_status *)ap->a_data;
283 if (procp->p_step == 0) {
284 error = tsleep(&procp->p_stype, PCATCH, "piocwait", 0);
288 psp->state = 1; /* It stopped */
289 psp->flags = procp->p_pfsflags;
290 psp->events = procp->p_stops;
291 psp->why = procp->p_stype; /* why it stopped */
292 psp->val = procp->p_xstat; /* any extra info */
294 case PIOCCONT: /* Restart a proc */
295 if (procp->p_step == 0)
296 return EINVAL; /* Can only start a stopped process */
297 if ((signo = *(int*)ap->a_data) != 0) {
298 if (signo >= NSIG || signo <= 0)
300 psignal(procp, signo);
303 wakeup(&procp->p_step);
312 * do block mapping for pfsnode (vp).
313 * since we don't use the buffer cache
314 * for procfs this function should never
315 * be called. in any case, it's not clear
316 * what part of the kernel ever makes use
317 * of this function. for sanity, this is the
318 * usual no-op bmap, although returning
319 * (EIO) would be a reasonable alternative.
321 * procfs_bmap(struct vnode *a_vp, daddr_t a_bn, struct vnode **a_vpp,
322 * daddr_t *a_bnp, int *a_runp)
325 procfs_bmap(struct vop_bmap_args *ap)
327 if (ap->a_vpp != NULL)
328 *ap->a_vpp = ap->a_vp;
329 if (ap->a_bnp != NULL)
330 *ap->a_bnp = ap->a_bn;
331 if (ap->a_runp != NULL)
337 * procfs_inactive is called when the pfsnode
338 * is vrele'd and the reference count goes
339 * to zero. (vp) will be on the vnode free
340 * list, so to get it back vget() must be
343 * (vp) is locked on entry, but must be unlocked on exit.
345 * procfs_inactive(struct vnode *a_vp, struct thread *a_td)
348 procfs_inactive(struct vop_inactive_args *ap)
350 struct vnode *vp = ap->a_vp;
352 VOP_UNLOCK(vp, NULL, 0, ap->a_td);
358 * _reclaim is called when getnewvnode()
359 * wants to make use of an entry on the vnode
360 * free list. at this time the filesystem needs
361 * to free any private data and remove the node
362 * from any private lists.
364 * procfs_reclaim(struct vnode *a_vp)
367 procfs_reclaim(struct vop_reclaim_args *ap)
369 return (procfs_freevp(ap->a_vp));
373 * _print is used for debugging.
374 * just print a readable description
377 * procfs_print(struct vnode *a_vp)
380 procfs_print(struct vop_print_args *ap)
382 struct pfsnode *pfs = VTOPFS(ap->a_vp);
384 printf("tag VT_PROCFS, type %d, pid %ld, mode %x, flags %lx\n",
385 pfs->pfs_type, (long)pfs->pfs_pid, pfs->pfs_mode, pfs->pfs_flags);
390 * generic entry point for unsupported operations
399 * Invent attributes for pfsnode (vp) and store
401 * Directories lengths are returned as zero since
402 * any real length would require the genuine size
403 * to be computed, and nothing cares anyway.
405 * this is relatively minimal for procfs.
407 * procfs_getattr(struct vnode *a_vp, struct vattr *a_vap,
408 * struct ucred *a_cred, struct thread *a_td)
411 procfs_getattr(struct vop_getattr_args *ap)
413 struct pfsnode *pfs = VTOPFS(ap->a_vp);
414 struct vattr *vap = ap->a_vap;
419 * First make sure that the process and its credentials
422 switch (pfs->pfs_type) {
429 procp = PFIND(pfs->pfs_pid);
430 if (procp == NULL || procp->p_ucred == NULL)
436 /* start by zeroing out the attributes */
439 /* next do all the common fields */
440 vap->va_type = ap->a_vp->v_type;
441 vap->va_mode = pfs->pfs_mode;
442 vap->va_fileid = pfs->pfs_fileno;
444 vap->va_blocksize = PAGE_SIZE;
445 vap->va_bytes = vap->va_size = 0;
446 vap->va_fsid = ap->a_vp->v_mount->mnt_stat.f_fsid.val[0];
449 * Make all times be current TOD.
450 * It would be possible to get the process start
451 * time from the p_stat structure, but there's
452 * no "file creation" time stamp anyway, and the
453 * p_stat structure is not addressible if u. gets
454 * swapped out for that process.
456 nanotime(&vap->va_ctime);
457 vap->va_atime = vap->va_mtime = vap->va_ctime;
460 * If the process has exercised some setuid or setgid
461 * privilege, then rip away read/write permission so
462 * that only root can gain access.
464 switch (pfs->pfs_type) {
470 if (procp->p_flag & P_SUGID)
471 vap->va_mode &= ~((VREAD|VWRITE)|
473 ((VREAD|VWRITE)>>6));
480 * now do the object specific fields
482 * The size could be set from struct reg, but it's hardly
483 * worth the trouble, and it puts some (potentially) machine
484 * dependent data into this machine-independent code. If it
485 * becomes important then this function should break out into
486 * a per-file stat function in the corresponding .c file.
491 vap->va_uid = procp->p_ucred->cr_uid;
492 vap->va_gid = procp->p_ucred->cr_gid;
495 switch (pfs->pfs_type) {
498 * Set nlink to 1 to tell fts(3) we don't actually know.
503 vap->va_size = vap->va_bytes = DEV_BSIZE;
507 char buf[16]; /* should be enough */
510 vap->va_size = vap->va_bytes =
511 snprintf(buf, sizeof(buf), "%ld", (long)curproc->p_pid);
516 vap->va_nlink = nproc_targets;
517 vap->va_size = vap->va_bytes = DEV_BSIZE;
521 char *fullpath, *freepath;
522 error = vn_fullpath(procp, NULL, &fullpath, &freepath);
524 vap->va_size = strlen(fullpath);
525 free(freepath, M_TEMP);
527 vap->va_size = sizeof("unknown") - 1;
530 vap->va_bytes = vap->va_size;
536 * If we denied owner access earlier, then we have to
537 * change the owner to root - otherwise 'ps' and friends
538 * will break even though they are setgid kmem. *SIGH*
540 if (procp->p_flag & P_SUGID)
543 vap->va_uid = procp->p_ucred->cr_uid;
547 vap->va_bytes = vap->va_size = sizeof(struct reg);
551 vap->va_bytes = vap->va_size = sizeof(struct fpreg);
555 vap->va_bytes = vap->va_size = sizeof(struct dbreg);
569 panic("procfs_getattr");
576 * procfs_setattr(struct vnode *a_vp, struct vattr *a_vap,
577 * struct ucred *a_cred, struct thread *a_td)
580 procfs_setattr(struct vop_setattr_args *ap)
582 if (ap->a_vap->va_flags != VNOVAL)
586 * just fake out attribute setting
587 * it's not good to generate an error
588 * return, otherwise things like creat()
589 * will fail when they try to set the
590 * file length to 0. worse, this means
591 * that echo $note > /proc/$pid/note will fail.
598 * implement access checking.
600 * something very similar to this code is duplicated
601 * throughout the 4bsd kernel and should be moved
602 * into kern/vfs_subr.c sometime.
604 * actually, the check for super-user is slightly
605 * broken since it will allow read access to write-only
606 * objects. this doesn't cause any particular trouble
607 * but does mean that the i/o entry points need to check
608 * that the operation really does make sense.
610 * procfs_access(struct vnode *a_vp, int a_mode, struct ucred *a_cred,
611 * struct thread *a_td)
614 procfs_access(struct vop_access_args *ap)
621 * If you're the super-user,
622 * you always get access.
624 if (ap->a_cred->cr_uid == 0)
628 error = VOP_GETATTR(ap->a_vp, vap, ap->a_td);
633 * Access check is based on only one of owner, group, public.
634 * If not owner, then check group. If not a member of the
635 * group, then check public access.
637 if (ap->a_cred->cr_uid != vap->va_uid) {
642 gp = ap->a_cred->cr_groups;
643 for (i = 0; i < ap->a_cred->cr_ngroups; i++, gp++)
644 if (vap->va_gid == *gp)
651 if ((vap->va_mode & ap->a_mode) == ap->a_mode)
658 * lookup. this is incredibly complicated in the general case, however
659 * for most pseudo-filesystems very little needs to be done.
661 * procfs_lookup(struct vnode *a_dvp, struct vnode **a_vpp,
662 * struct componentname *a_cnp)
665 procfs_lookup(struct vop_lookup_args *ap)
667 struct componentname *cnp = ap->a_cnp;
668 struct vnode **vpp = ap->a_vpp;
669 struct vnode *dvp = ap->a_dvp;
670 char *pname = cnp->cn_nameptr;
671 /* struct proc *curp = cnp->cn_proc; */
672 struct proc_target *pt;
681 if (cnp->cn_nameiop == NAMEI_DELETE || cnp->cn_nameiop == NAMEI_RENAME)
685 if (cnp->cn_namelen == 1 && *pname == '.') {
692 switch (pfs->pfs_type) {
694 if (cnp->cn_flags & CNP_ISDOTDOT)
697 if (CNEQ(cnp, "curproc", 7)) {
698 error = procfs_allocvp(dvp->v_mount, vpp, 0, Pcurproc);
702 pid = atopid(pname, cnp->cn_namelen);
710 if (ps_showallprocs == 0 && ap->a_cnp->cn_cred->cr_uid != 0 &&
711 ap->a_cnp->cn_cred->cr_uid != p->p_ucred->cr_uid)
714 error = procfs_allocvp(dvp->v_mount, vpp, pid, Pproc);
718 if (cnp->cn_flags & CNP_ISDOTDOT) {
719 error = procfs_root(dvp->v_mount, vpp);
723 p = PFIND(pfs->pfs_pid);
727 if (ps_showallprocs == 0 && ap->a_cnp->cn_cred->cr_uid != 0 &&
728 ap->a_cnp->cn_cred->cr_uid != p->p_ucred->cr_uid)
731 for (pt = proc_targets, i = 0; i < nproc_targets; pt++, i++) {
732 if (cnp->cn_namelen == pt->pt_namlen &&
733 bcmp(pt->pt_name, pname, cnp->cn_namelen) == 0 &&
734 (pt->pt_valid == NULL || (*pt->pt_valid)(p)))
739 error = procfs_allocvp(dvp->v_mount, vpp, pfs->pfs_pid,
747 if (cnp->cn_nameiop == NAMEI_LOOKUP)
752 * If no error occured *vpp will hold a referenced locked vnode.
753 * dvp was passed to us locked and *vpp must be returned locked
754 * so if dvp != *vpp and CNP_LOCKPARENT is not set, unlock dvp.
758 if (*vpp != dvp && (cnp->cn_flags & CNP_LOCKPARENT) == 0) {
759 cnp->cn_flags |= CNP_PDIRUNLOCK;
760 VOP_UNLOCK(dvp, NULL, 0, cnp->cn_td);
767 * Does this process have a text file?
770 procfs_validfile(struct proc *p)
772 return (procfs_findtextvp(p) != NULLVP);
776 * readdir() returns directory entries from pfsnode (vp).
778 * We generate just one directory entry at a time, as it would probably
779 * not pay off to buffer several entries locally to save uiomove calls.
781 * procfs_readdir(struct vnode *a_vp, struct uio *a_uio, struct ucred *a_cred,
782 * int *a_eofflag, int *a_ncookies, u_long **a_cookies)
785 procfs_readdir(struct vop_readdir_args *ap)
787 struct uio *uio = ap->a_uio;
789 struct dirent *dp = &d;
791 int count, error, i, off;
796 d.d_namlen = PROCFS_NAMELEN;
797 delen = GENERIC_DIRSIZ(&d);
800 pfs = VTOPFS(ap->a_vp);
802 off = (int)uio->uio_offset;
803 if (off != uio->uio_offset || off < 0 ||
804 off % delen != 0 || uio->uio_resid < delen)
811 switch (pfs->pfs_type) {
813 * this is for the process-specific sub-directories.
814 * all that is needed to is copy out all the entries
815 * from the procent[] table (top of this file).
819 struct proc_target *pt;
821 p = PFIND(pfs->pfs_pid);
824 if (!PRISON_CHECK(ap->a_cred, p->p_ucred))
827 for (pt = &proc_targets[i];
828 uio->uio_resid >= delen && i < nproc_targets; pt++, i++) {
829 if (pt->pt_valid && (*pt->pt_valid)(p) == 0)
832 dp->d_reclen = delen;
833 dp->d_fileno = PROCFS_FILENO(pfs->pfs_pid, pt->pt_pfstype);
834 dp->d_namlen = pt->pt_namlen;
835 bcopy(pt->pt_name, dp->d_name, pt->pt_namlen + 1);
836 dp->d_type = pt->pt_type;
838 if ((error = uiomove((caddr_t)dp, delen, uio)) != 0)
846 * this is for the root of the procfs filesystem
847 * what is needed is a special entry for "curproc"
848 * followed by an entry for each process on allproc
859 volatile struct proc *p = allproc.lh_first;
861 for (; p && uio->uio_resid >= delen; i++, pcnt++) {
862 bzero((char *) dp, delen);
863 dp->d_reclen = delen;
868 dp->d_fileno = PROCFS_FILENO(0, Proot);
869 dp->d_namlen = i + 1;
870 bcopy("..", dp->d_name, dp->d_namlen);
871 dp->d_name[i + 1] = '\0';
876 dp->d_fileno = PROCFS_FILENO(0, Pcurproc);
878 bcopy("curproc", dp->d_name, 8);
884 p = p->p_list.le_next;
887 if (!PRISON_CHECK(ap->a_cred, p->p_ucred))
891 while (!PRISON_CHECK(ap->a_cred, p->p_ucred)) {
892 p = p->p_list.le_next;
896 if (ps_showallprocs == 0 &&
897 ap->a_cred->cr_uid != 0 &&
898 ap->a_cred->cr_uid !=
899 p->p_ucred->cr_uid) {
900 p = p->p_list.le_next;
906 dp->d_fileno = PROCFS_FILENO(p->p_pid, Pproc);
907 dp->d_namlen = sprintf(dp->d_name, "%ld",
910 p = p->p_list.le_next;
914 if ((error = uiomove((caddr_t)dp, delen, uio)) != 0)
920 if (p == NULL && doingzomb == 0) {
922 p = zombproc.lh_first;
936 uio->uio_offset = i * delen;
942 * readlink reads the link of `curproc' or `file'
945 procfs_readlink(struct vop_readlink_args *ap)
947 char buf[16]; /* should be enough */
949 struct vnode *vp = ap->a_vp;
950 struct pfsnode *pfs = VTOPFS(vp);
951 char *fullpath, *freepath;
954 switch (pfs->pfs_type) {
956 if (pfs->pfs_fileno != PROCFS_FILENO(0, Pcurproc))
959 len = snprintf(buf, sizeof(buf), "%ld", (long)curproc->p_pid);
961 return (uiomove(buf, len, ap->a_uio));
963 * There _should_ be no way for an entire process to disappear
967 procp = PFIND(pfs->pfs_pid);
968 if (procp == NULL || procp->p_ucred == NULL) {
969 printf("procfs_readlink: pid %d disappeared\n",
971 return (uiomove("unknown", sizeof("unknown") - 1,
974 error = vn_fullpath(procp, NULL, &fullpath, &freepath);
976 return (uiomove("unknown", sizeof("unknown") - 1,
978 error = uiomove(fullpath, strlen(fullpath), ap->a_uio);
979 free(freepath, M_TEMP);
987 * convert decimal ascii to pid_t
990 atopid(const char *b, u_int len)
996 if (c < '0' || c > '9')
998 p = 10 * p + (c - '0');
1007 * procfs vnode operations.
1009 struct vnodeopv_entry_desc procfs_vnodeop_entries[] = {
1010 { &vop_default_desc, vop_defaultop },
1011 { &vop_access_desc, (void *) procfs_access },
1012 { &vop_advlock_desc, (void *) procfs_badop },
1013 { &vop_bmap_desc, (void *) procfs_bmap },
1014 { &vop_close_desc, (void *) procfs_close },
1015 { &vop_create_desc, (void *) procfs_badop },
1016 { &vop_getattr_desc, (void *) procfs_getattr },
1017 { &vop_inactive_desc, (void *) procfs_inactive },
1018 { &vop_link_desc, (void *) procfs_badop },
1019 { &vop_lookup_desc, (void *) procfs_lookup },
1020 { &vop_mkdir_desc, (void *) procfs_badop },
1021 { &vop_mknod_desc, (void *) procfs_badop },
1022 { &vop_open_desc, (void *) procfs_open },
1023 { &vop_pathconf_desc, (void *) vop_stdpathconf },
1024 { &vop_print_desc, (void *) procfs_print },
1025 { &vop_read_desc, (void *) procfs_rw },
1026 { &vop_readdir_desc, (void *) procfs_readdir },
1027 { &vop_readlink_desc, (void *) procfs_readlink },
1028 { &vop_reclaim_desc, (void *) procfs_reclaim },
1029 { &vop_remove_desc, (void *) procfs_badop },
1030 { &vop_rename_desc, (void *) procfs_badop },
1031 { &vop_rmdir_desc, (void *) procfs_badop },
1032 { &vop_setattr_desc, (void *) procfs_setattr },
1033 { &vop_symlink_desc, (void *) procfs_badop },
1034 { &vop_write_desc, (void *) procfs_rw },
1035 { &vop_ioctl_desc, (void *) procfs_ioctl },