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33 * @(#)kvm_file.c 8.1 (Berkeley) 6/4/93
34 * $FreeBSD: src/lib/libkvm/kvm_file.c,v 1.11 2000/02/18 16:39:00 peter Exp $
38 * File list interface for kvm. pstat, fstat and netstat are
39 * users of this code, so we've factored it out into a separate module.
40 * Thus, we keep this grunge out of the other kvm applications (i.e.,
41 * most other applications are interested only in open/close/read/nlist).
44 #include <sys/user.h> /* MUST BE FIRST */
45 #include <sys/param.h>
51 #include <sys/ioctl.h>
56 #include <vm/vm_param.h>
57 #include <vm/swap_pager.h>
59 #include <sys/sysctl.h>
65 #include "kvm_private.h"
67 #define KREAD(kd, addr, obj) \
68 (kvm_read(kd, addr, obj, sizeof(*obj)) != sizeof(*obj))
71 * Get file structures.
74 kvm_deadfiles(kvm_t *kd, int op, int arg, long filehead_o, int nfiles)
76 int buflen = kd->arglen, n = 0;
78 char *where = kd->argspc;
79 struct filelist filehead;
82 * first copyout filehead
84 if (buflen > sizeof (filehead)) {
85 if (KREAD(kd, filehead_o, &filehead)) {
86 _kvm_err(kd, kd->program, "can't read filehead");
89 buflen -= sizeof (filehead);
90 where += sizeof (filehead);
91 *(struct filelist *)kd->argspc = filehead;
94 * followed by an array of file structures
96 for (fp = filehead.lh_first; fp != NULL; fp = fp->f_list.le_next) {
97 if (buflen > sizeof (struct file)) {
98 if (KREAD(kd, (long)fp, ((struct file *)where))) {
99 _kvm_err(kd, kd->program, "can't read kfp");
102 buflen -= sizeof (struct file);
103 fp = (struct file *)where;
104 where += sizeof (struct file);
109 _kvm_err(kd, kd->program, "inconsistent nfiles");
116 kvm_getfiles(kvm_t *kd, int op, int arg, int *cnt)
118 int mib[2], st, nfiles;
120 struct file *fp, *fplim;
121 struct filelist filehead;
123 if (kvm_ishost(kd)) {
127 st = sysctl(mib, 2, NULL, &size, NULL, 0);
129 _kvm_syserr(kd, kd->program, "kvm_getfiles");
133 kd->argspc = (char *)_kvm_malloc(kd, size);
134 else if (kd->arglen < size)
135 kd->argspc = (char *)_kvm_realloc(kd, kd->argspc, size);
139 st = sysctl(mib, 2, kd->argspc, &size, NULL, 0);
140 if (st == -1 || size < sizeof(filehead)) {
141 _kvm_syserr(kd, kd->program, "kvm_getfiles");
144 filehead = *(struct filelist *)kd->argspc;
145 fp = (struct file *)(kd->argspc + sizeof (filehead));
146 fplim = (struct file *)(kd->argspc + size);
147 for (nfiles = 0; filehead.lh_first && (fp < fplim); nfiles++, fp++)
148 filehead.lh_first = fp->f_list.le_next;
150 struct nlist nl[3], *p;
152 nl[0].n_name = "_filehead";
153 nl[1].n_name = "_nfiles";
156 if (kvm_nlist(kd, nl) != 0) {
157 for (p = nl; p->n_type != 0; ++p)
159 _kvm_err(kd, kd->program,
160 "%s: no such symbol", p->n_name);
163 if (KREAD(kd, nl[0].n_value, &nfiles)) {
164 _kvm_err(kd, kd->program, "can't read nfiles");
167 size = sizeof(filehead) + (nfiles + 10) * sizeof(struct file);
169 kd->argspc = (char *)_kvm_malloc(kd, size);
170 else if (kd->arglen < size)
171 kd->argspc = (char *)_kvm_realloc(kd, kd->argspc, size);
175 nfiles = kvm_deadfiles(kd, op, arg, nl[1].n_value, nfiles);