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392cc8343e
kvm_getfiles() referred to itself as kvm_getprocs().
194 lines
5.6 KiB
C
194 lines
5.6 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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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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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#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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#else
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static const char rcsid[] =
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"$FreeBSD$";
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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 _KERNEL
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#include <sys/file.h>
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#undef _KERNEL
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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 <vm/swap_pager.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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/*
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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, filehead_o, nfiles)
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kvm_t *kd;
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int op, arg, nfiles;
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long filehead_o;
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{
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int buflen = kd->arglen, n = 0;
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struct file *fp;
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register char *where = kd->argspc;
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struct filelist filehead;
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/*
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* first copyout filehead
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*/
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if (buflen > sizeof (filehead)) {
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if (KREAD(kd, filehead_o, &filehead)) {
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_kvm_err(kd, kd->program, "can't read filehead");
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return (0);
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}
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buflen -= sizeof (filehead);
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where += sizeof (filehead);
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*(struct filelist *)kd->argspc = filehead;
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}
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/*
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* followed by an array of file structures
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*/
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for (fp = filehead.lh_first; fp != 0; fp = fp->f_list.le_next) {
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if (buflen > sizeof (struct file)) {
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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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return (0);
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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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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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return (nfiles);
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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, nfiles;
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size_t size;
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struct file *fp, *fplim;
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struct filelist filehead;
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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 == -1 || size < sizeof(filehead)) {
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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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filehead = *(struct filelist *)kd->argspc;
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fp = (struct file *)(kd->argspc + sizeof (filehead));
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fplim = (struct file *)(kd->argspc + size);
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for (nfiles = 0; filehead.lh_first && (fp < fplim); nfiles++, fp++)
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filehead.lh_first = fp->f_list.le_next;
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} else {
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struct nlist nl[3], *p;
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nl[0].n_name = "_filehead";
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nl[1].n_name = "_nfiles";
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nl[2].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[0].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(filehead) + (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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nfiles = kvm_deadfiles(kd, op, arg, nl[1].n_value, nfiles);
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if (nfiles == 0)
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return (0);
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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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