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-rw-r--r--lib/libkvm/kvm_file.c231
1 files changed, 231 insertions, 0 deletions
diff --git a/lib/libkvm/kvm_file.c b/lib/libkvm/kvm_file.c
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+++ b/lib/libkvm/kvm_file.c
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+/*-
+ * Copyright (c) 1989, 1992, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#if defined(LIBC_SCCS) && !defined(lint)
+#if 0
+static char sccsid[] = "@(#)kvm_file.c 8.1 (Berkeley) 6/4/93";
+#endif
+#endif /* LIBC_SCCS and not lint */
+
+/*
+ * File list interface for kvm. pstat, fstat and netstat are
+ * users of this code, so we've factored it out into a separate module.
+ * Thus, we keep this grunge out of the other kvm applications (i.e.,
+ * most other applications are interested only in open/close/read/nlist).
+ */
+
+#include <sys/param.h>
+#include <sys/user.h>
+#include <sys/proc.h>
+#define _KERNEL
+#include <sys/file.h>
+#undef _KERNEL
+#include <sys/stat.h>
+#include <sys/ioctl.h>
+#include <nlist.h>
+#include <kvm.h>
+
+#include <vm/vm.h>
+#include <vm/vm_param.h>
+
+#include <sys/sysctl.h>
+
+#include <limits.h>
+#include <ndbm.h>
+#include <paths.h>
+
+#include "kvm_private.h"
+
+#define KREAD(kd, addr, obj) \
+ (kvm_read(kd, addr, obj, sizeof(*obj)) != sizeof(*obj))
+
+#define KREADN(kd, addr, obj, cnt) \
+ (kvm_read(kd, addr, obj, (cnt)) != (cnt))
+
+/*
+ * Get file structures.
+ */
+static int
+kvm_deadfiles(kd, op, arg, allproc_o, nprocs)
+ kvm_t *kd;
+ int op, arg, nprocs;
+ long allproc_o;
+{
+ struct proc proc;
+ struct filedesc filed;
+ int buflen = kd->arglen, ocnt = 0, n = 0, once = 0, i;
+ struct file **ofiles;
+ struct file *fp;
+ struct proc *p;
+ char *where = kd->argspc;
+
+ if (buflen < sizeof (struct file *) + sizeof (struct file))
+ return (0);
+ if (KREAD(kd, allproc_o, &p)) {
+ _kvm_err(kd, kd->program, "cannot read allproc");
+ return (0);
+ }
+ for (; p != NULL; p = LIST_NEXT(&proc, p_list)) {
+ if (KREAD(kd, (u_long)p, &proc)) {
+ _kvm_err(kd, kd->program, "can't read proc at %x", p);
+ goto fail;
+ }
+ if (proc.p_state == PRS_NEW)
+ continue;
+ if (proc.p_fd == NULL)
+ continue;
+ if (KREAD(kd, (u_long)p->p_fd, &filed)) {
+ _kvm_err(kd, kd->program, "can't read filedesc at %x",
+ p->p_fd);
+ goto fail;
+ }
+ if (filed.fd_lastfile + 1 > ocnt) {
+ ocnt = filed.fd_lastfile + 1;
+ free(ofiles);
+ ofiles = (struct file **)_kvm_malloc(kd,
+ ocnt * sizeof(struct file *));
+ if (ofiles == 0)
+ return (0);
+ }
+ if (KREADN(kd, (u_long)filed.fd_ofiles, ofiles,
+ ocnt * sizeof(struct file *))) {
+ _kvm_err(kd, kd->program, "can't read ofiles at %x",
+ filed.fd_ofiles);
+ return (0);
+ }
+ for (i = 0; i <= filed.fd_lastfile; i++) {
+ if ((fp = ofiles[i]) == NULL)
+ continue;
+ /*
+ * copyout filehead (legacy)
+ */
+ if (!once) {
+ *(struct file **)kd->argspc = fp;
+ *(struct file **)where = fp;
+ buflen -= sizeof (fp);
+ where += sizeof (fp);
+ once = 1;
+ }
+ if (buflen < sizeof (struct file))
+ goto fail;
+ if (KREAD(kd, (long)fp, ((struct file *)where))) {
+ _kvm_err(kd, kd->program, "can't read kfp");
+ goto fail;
+ }
+ buflen -= sizeof (struct file);
+ fp = (struct file *)where;
+ where += sizeof (struct file);
+ n++;
+ }
+ }
+ free(ofiles);
+ return (n);
+fail:
+ free(ofiles);
+ return (0);
+
+}
+
+char *
+kvm_getfiles(kd, op, arg, cnt)
+ kvm_t *kd;
+ int op, arg;
+ int *cnt;
+{
+ int mib[2], st, n, nfiles, nprocs;
+ size_t size;
+
+ _kvm_syserr(kd, kd->program, "kvm_getfiles has been broken for years");
+ return (0);
+ if (ISALIVE(kd)) {
+ size = 0;
+ mib[0] = CTL_KERN;
+ mib[1] = KERN_FILE;
+ st = sysctl(mib, 2, NULL, &size, NULL, 0);
+ if (st == -1) {
+ _kvm_syserr(kd, kd->program, "kvm_getfiles");
+ return (0);
+ }
+ if (kd->argspc == 0)
+ kd->argspc = (char *)_kvm_malloc(kd, size);
+ else if (kd->arglen < size)
+ kd->argspc = (char *)_kvm_realloc(kd, kd->argspc, size);
+ if (kd->argspc == 0)
+ return (0);
+ kd->arglen = size;
+ st = sysctl(mib, 2, kd->argspc, &size, NULL, 0);
+ if (st != 0) {
+ _kvm_syserr(kd, kd->program, "kvm_getfiles");
+ return (0);
+ }
+ nfiles = size / sizeof(struct xfile);
+ } else {
+ struct nlist nl[4], *p;
+
+ nl[0].n_name = "_allproc";
+ nl[1].n_name = "_nprocs";
+ nl[2].n_name = "_nfiles";
+ nl[3].n_name = 0;
+
+ if (kvm_nlist(kd, nl) != 0) {
+ for (p = nl; p->n_type != 0; ++p)
+ ;
+ _kvm_err(kd, kd->program,
+ "%s: no such symbol", p->n_name);
+ return (0);
+ }
+ if (KREAD(kd, nl[1].n_value, &nprocs)) {
+ _kvm_err(kd, kd->program, "can't read nprocs");
+ return (0);
+ }
+ if (KREAD(kd, nl[2].n_value, &nfiles)) {
+ _kvm_err(kd, kd->program, "can't read nfiles");
+ return (0);
+ }
+ size = sizeof(void *) + (nfiles + 10) * sizeof(struct file);
+ if (kd->argspc == 0)
+ kd->argspc = (char *)_kvm_malloc(kd, size);
+ else if (kd->arglen < size)
+ kd->argspc = (char *)_kvm_realloc(kd, kd->argspc, size);
+ if (kd->argspc == 0)
+ return (0);
+ kd->arglen = size;
+ n = kvm_deadfiles(kd, op, arg, nl[0].n_value, nprocs);
+ if (n != nfiles) {
+ _kvm_err(kd, kd->program, "inconsistant nfiles");
+ return (0);
+ }
+ nfiles = n;
+ }
+ *cnt = nfiles;
+ return (kd->argspc);
+}
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