037dab5792
similar to _WANT_UCRED and _WANT_PRISON and seems to be much nicer than defining _KERNEL. It is also needed for my sys/refcount.h change going in soon.
231 lines
6.3 KiB
C
231 lines
6.3 KiB
C
/*-
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* Copyright (c) 1989, 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#if defined(LIBC_SCCS) && !defined(lint)
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#if 0
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static char sccsid[] = "@(#)kvm_file.c 8.1 (Berkeley) 6/4/93";
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#endif
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#endif /* LIBC_SCCS and not lint */
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/*
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* File list interface for kvm. pstat, fstat and netstat are
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* users of this code, so we've factored it out into a separate module.
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* Thus, we keep this grunge out of the other kvm applications (i.e.,
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* most other applications are interested only in open/close/read/nlist).
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*/
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#include <sys/param.h>
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#include <sys/user.h>
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#include <sys/proc.h>
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#define _WANT_FILE /* make file.h give us 'struct file' */
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#include <sys/file.h>
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#include <sys/stat.h>
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#include <sys/ioctl.h>
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#include <nlist.h>
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#include <kvm.h>
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#include <vm/vm.h>
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#include <vm/vm_param.h>
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#include <sys/sysctl.h>
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#include <limits.h>
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#include <ndbm.h>
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#include <paths.h>
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#include "kvm_private.h"
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#define KREAD(kd, addr, obj) \
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(kvm_read(kd, addr, obj, sizeof(*obj)) != sizeof(*obj))
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#define KREADN(kd, addr, obj, cnt) \
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(kvm_read(kd, addr, obj, (cnt)) != (cnt))
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/*
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* Get file structures.
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*/
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static int
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kvm_deadfiles(kd, op, arg, allproc_o, nprocs)
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kvm_t *kd;
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int op, arg, nprocs;
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long allproc_o;
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{
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struct proc proc;
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struct filedesc filed;
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int buflen = kd->arglen, ocnt = 0, n = 0, once = 0, i;
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struct file **ofiles;
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struct file *fp;
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struct proc *p;
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char *where = kd->argspc;
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if (buflen < sizeof (struct file *) + sizeof (struct file))
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return (0);
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if (KREAD(kd, allproc_o, &p)) {
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_kvm_err(kd, kd->program, "cannot read allproc");
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return (0);
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}
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for (; p != NULL; p = LIST_NEXT(&proc, p_list)) {
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if (KREAD(kd, (u_long)p, &proc)) {
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_kvm_err(kd, kd->program, "can't read proc at %x", p);
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goto fail;
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}
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if (proc.p_state == PRS_NEW)
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continue;
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if (proc.p_fd == NULL)
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continue;
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if (KREAD(kd, (u_long)p->p_fd, &filed)) {
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_kvm_err(kd, kd->program, "can't read filedesc at %x",
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p->p_fd);
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goto fail;
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}
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if (filed.fd_lastfile + 1 > ocnt) {
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ocnt = filed.fd_lastfile + 1;
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free(ofiles);
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ofiles = (struct file **)_kvm_malloc(kd,
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ocnt * sizeof(struct file *));
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if (ofiles == 0)
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return (0);
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}
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if (KREADN(kd, (u_long)filed.fd_ofiles, ofiles,
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ocnt * sizeof(struct file *))) {
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_kvm_err(kd, kd->program, "can't read ofiles at %x",
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filed.fd_ofiles);
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return (0);
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}
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for (i = 0; i <= filed.fd_lastfile; i++) {
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if ((fp = ofiles[i]) == NULL)
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continue;
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/*
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* copyout filehead (legacy)
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*/
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if (!once) {
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*(struct file **)kd->argspc = fp;
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*(struct file **)where = fp;
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buflen -= sizeof (fp);
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where += sizeof (fp);
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once = 1;
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}
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if (buflen < sizeof (struct file))
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goto fail;
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if (KREAD(kd, (long)fp, ((struct file *)where))) {
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_kvm_err(kd, kd->program, "can't read kfp");
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goto fail;
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}
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buflen -= sizeof (struct file);
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fp = (struct file *)where;
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where += sizeof (struct file);
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n++;
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}
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}
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free(ofiles);
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return (n);
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fail:
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free(ofiles);
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return (0);
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}
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char *
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kvm_getfiles(kd, op, arg, cnt)
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kvm_t *kd;
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int op, arg;
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int *cnt;
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{
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int mib[2], st, n, nfiles, nprocs;
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size_t size;
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_kvm_syserr(kd, kd->program, "kvm_getfiles has been broken for years");
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return (0);
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if (ISALIVE(kd)) {
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size = 0;
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mib[0] = CTL_KERN;
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mib[1] = KERN_FILE;
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st = sysctl(mib, 2, NULL, &size, NULL, 0);
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if (st == -1) {
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_kvm_syserr(kd, kd->program, "kvm_getfiles");
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return (0);
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}
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if (kd->argspc == 0)
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kd->argspc = (char *)_kvm_malloc(kd, size);
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else if (kd->arglen < size)
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kd->argspc = (char *)_kvm_realloc(kd, kd->argspc, size);
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if (kd->argspc == 0)
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return (0);
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kd->arglen = size;
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st = sysctl(mib, 2, kd->argspc, &size, NULL, 0);
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if (st != 0) {
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_kvm_syserr(kd, kd->program, "kvm_getfiles");
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return (0);
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}
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nfiles = size / sizeof(struct xfile);
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} else {
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struct nlist nl[4], *p;
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nl[0].n_name = "_allproc";
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nl[1].n_name = "_nprocs";
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nl[2].n_name = "_nfiles";
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nl[3].n_name = 0;
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if (kvm_nlist(kd, nl) != 0) {
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for (p = nl; p->n_type != 0; ++p)
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;
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_kvm_err(kd, kd->program,
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"%s: no such symbol", p->n_name);
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return (0);
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}
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if (KREAD(kd, nl[1].n_value, &nprocs)) {
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_kvm_err(kd, kd->program, "can't read nprocs");
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return (0);
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}
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if (KREAD(kd, nl[2].n_value, &nfiles)) {
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_kvm_err(kd, kd->program, "can't read nfiles");
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return (0);
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}
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size = sizeof(void *) + (nfiles + 10) * sizeof(struct file);
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if (kd->argspc == 0)
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kd->argspc = (char *)_kvm_malloc(kd, size);
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else if (kd->arglen < size)
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kd->argspc = (char *)_kvm_realloc(kd, kd->argspc, size);
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if (kd->argspc == 0)
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return (0);
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kd->arglen = size;
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n = kvm_deadfiles(kd, op, arg, nl[0].n_value, nprocs);
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if (n != nfiles) {
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_kvm_err(kd, kd->program, "inconsistant nfiles");
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return (0);
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}
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nfiles = n;
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}
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*cnt = nfiles;
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return (kd->argspc);
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}
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