2 * Copyright (c) 1989, 1992, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
33 #if defined(LIBC_SCCS) && !defined(lint)
35 static char sccsid[] = "@(#)kvm_file.c 8.1 (Berkeley) 6/4/93";
37 #endif /* LIBC_SCCS and not lint */
40 * File list interface for kvm. pstat, fstat and netstat are
41 * users of this code, so we've factored it out into a separate module.
42 * Thus, we keep this grunge out of the other kvm applications (i.e.,
43 * most other applications are interested only in open/close/read/nlist).
46 #include <sys/param.h>
49 #define _WANT_FILE /* make file.h give us 'struct file' */
52 #include <sys/ioctl.h>
57 #include <vm/vm_param.h>
59 #include <sys/sysctl.h>
66 #include "kvm_private.h"
68 #define KREAD(kd, addr, obj) \
69 (kvm_read(kd, addr, obj, sizeof(*obj)) != sizeof(*obj))
71 #define KREADN(kd, addr, obj, cnt) \
72 (kvm_read(kd, addr, obj, (cnt)) != (ssize_t)(cnt))
75 * Get file structures.
78 kvm_deadfiles(kvm_t *kd, int op __unused, int arg __unused, long allproc_o,
82 struct filedesc filed;
83 int buflen = kd->arglen, ocnt = 0, n = 0, once = 0, i;
87 char *where = kd->argspc;
89 if (buflen < (int)(sizeof(struct file *) + sizeof(struct file)))
91 if (KREAD(kd, allproc_o, &p)) {
92 _kvm_err(kd, kd->program, "cannot read allproc");
95 for (; p != NULL; p = LIST_NEXT(&proc, p_list)) {
96 if (KREAD(kd, (u_long)p, &proc)) {
97 _kvm_err(kd, kd->program, "can't read proc at %p", p);
100 if (proc.p_state == PRS_NEW)
102 if (proc.p_fd == NULL)
104 if (KREAD(kd, (u_long)p->p_fd, &filed)) {
105 _kvm_err(kd, kd->program, "can't read filedesc at %p",
109 if (filed.fd_lastfile + 1 > ocnt) {
110 ocnt = filed.fd_lastfile + 1;
112 ofiles = (struct file **)_kvm_malloc(kd,
113 ocnt * sizeof(struct file *));
117 if (KREADN(kd, (u_long)filed.fd_ofiles, ofiles,
118 ocnt * sizeof(struct file *))) {
119 _kvm_err(kd, kd->program, "can't read ofiles at %p",
123 for (i = 0; i <= filed.fd_lastfile; i++) {
124 if ((fp = ofiles[i]) == NULL)
127 * copyout filehead (legacy)
130 *(struct file **)kd->argspc = fp;
131 *(struct file **)where = fp;
132 buflen -= sizeof (fp);
133 where += sizeof (fp);
136 if (buflen < (int)sizeof(struct file))
138 if (KREAD(kd, (long)fp, ((struct file *)where))) {
139 _kvm_err(kd, kd->program, "can't read kfp");
142 buflen -= sizeof (struct file);
143 fp = (struct file *)where;
144 where += sizeof (struct file);
157 kvm_getfiles(kvm_t *kd, int op, int arg, int *cnt)
159 int mib[2], st, n, nfiles, nprocs;
162 _kvm_syserr(kd, kd->program, "kvm_getfiles has been broken for years");
168 st = sysctl(mib, 2, NULL, &size, NULL, 0);
170 _kvm_syserr(kd, kd->program, "kvm_getfiles");
174 kd->argspc = (char *)_kvm_malloc(kd, size);
175 else if (kd->arglen < (int)size)
176 kd->argspc = (char *)_kvm_realloc(kd, kd->argspc, size);
180 st = sysctl(mib, 2, kd->argspc, &size, NULL, 0);
182 _kvm_syserr(kd, kd->program, "kvm_getfiles");
185 nfiles = size / sizeof(struct xfile);
187 struct nlist nl[4], *p;
189 nl[0].n_name = "_allproc";
190 nl[1].n_name = "_nprocs";
191 nl[2].n_name = "_nfiles";
194 if (kvm_nlist(kd, nl) != 0) {
195 for (p = nl; p->n_type != 0; ++p)
197 _kvm_err(kd, kd->program,
198 "%s: no such symbol", p->n_name);
201 if (KREAD(kd, nl[1].n_value, &nprocs)) {
202 _kvm_err(kd, kd->program, "can't read nprocs");
205 if (KREAD(kd, nl[2].n_value, &nfiles)) {
206 _kvm_err(kd, kd->program, "can't read nfiles");
209 size = sizeof(void *) + (nfiles + 10) * sizeof(struct file);
211 kd->argspc = (char *)_kvm_malloc(kd, size);
212 else if (kd->arglen < (int)size)
213 kd->argspc = (char *)_kvm_realloc(kd, kd->argspc, size);
217 n = kvm_deadfiles(kd, op, arg, nl[0].n_value, nprocs);
219 _kvm_err(kd, kd->program, "inconsistant nfiles");