/
sysctl.c
2790 lines (2534 loc) · 62.8 KB
/
sysctl.c
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/* $NetBSD: sysctl.c,v 1.138.2.4 2014/05/22 11:37:32 yamt Exp $ */
/*-
* Copyright (c) 2003 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Andrew Brown.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/*
* Copyright (c) 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.
* 3. 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>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1993\
The Regents of the University of California. All rights reserved.");
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)sysctl.c 8.1 (Berkeley) 6/6/93";
#else
__RCSID("$NetBSD: sysctl.c,v 1.138.2.4 2014/05/22 11:37:32 yamt Exp $");
#endif
#endif /* not lint */
#include <sys/types.h>
#include <sys/param.h>
#include <sys/sysctl.h>
#include <sys/mount.h>
#include <sys/resource.h>
#include <sys/stat.h>
#include <sys/sched.h>
#include <sys/socket.h>
#include <sys/bitops.h>
#include <netinet/in.h>
#include <netinet/ip_var.h>
#include <netinet/tcp.h>
#include <netinet/tcp_timer.h>
#include <netinet/tcp_var.h>
#include <netinet/icmp6.h>
#include <nfs/rpcv2.h>
#include <nfs/nfsproto.h>
#include <nfs/nfs.h>
#include <machine/cpu.h>
#include <assert.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <inttypes.h>
#include <regex.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include "prog_ops.h"
/*
* this needs to be able to do the printing and the setting
*/
#define HANDLER_PROTO const char *, const char *, char *, \
int *, u_int, const struct sysctlnode *, \
u_int, void *
#define HANDLER_ARGS const char *sname, const char *dname, char *value, \
int *name, u_int namelen, const struct sysctlnode *pnode, \
u_int type, void *v
#define DISPLAY_VALUE 0
#define DISPLAY_OLD 1
#define DISPLAY_NEW 2
/*
* generic routines
*/
static const struct handlespec *findhandler(const char *, regex_t *, size_t *);
static void canonicalize(const char *, char *);
static void purge_tree(struct sysctlnode *);
static void print_tree(int *, u_int, struct sysctlnode *, u_int, int, regex_t *,
size_t *);
static void write_number(int *, u_int, struct sysctlnode *, char *);
static void write_string(int *, u_int, struct sysctlnode *, char *);
static void display_number(const struct sysctlnode *, const char *,
const void *, size_t, int);
static void display_string(const struct sysctlnode *, const char *,
const void *, size_t, int);
static void display_struct(const struct sysctlnode *, const char *,
const void *, size_t, int);
static void hex_dump(const unsigned char *, size_t);
__dead static void usage(void);
static void parse(char *, regex_t *, size_t *);
static void parse_create(char *);
static void parse_destroy(char *);
static void parse_describe(char *);
static void getdesc1(int *, u_int, struct sysctlnode *);
static void getdesc(int *, u_int, struct sysctlnode *);
static void trim_whitespace(char *, int);
static void sysctlerror(int);
static void sysctlparseerror(u_int, const char *);
static void sysctlperror(const char *, ...) __printflike(1, 2);
#define EXIT(n) do { \
if (fn == NULL) exit(n); else return; } while (/*CONSTCOND*/0)
/*
* "borrowed" from libc:sysctlgetmibinfo.c
*/
int __learn_tree(int *, u_int, struct sysctlnode *);
/*
* "handlers"
*/
static void printother(HANDLER_PROTO);
static void kern_clockrate(HANDLER_PROTO);
static void kern_boottime(HANDLER_PROTO);
static void kern_consdev(HANDLER_PROTO);
static void kern_cp_time(HANDLER_PROTO);
static void kern_cp_id(HANDLER_PROTO);
static void kern_drivers(HANDLER_PROTO);
static void vm_loadavg(HANDLER_PROTO);
static void proc_limit(HANDLER_PROTO);
#ifdef CPU_DISKINFO
static void machdep_diskinfo(HANDLER_PROTO);
#endif /* CPU_DISKINFO */
static void mode_bits(HANDLER_PROTO);
static void reserve(HANDLER_PROTO);
static const struct handlespec {
const char *ps_re;
void (*ps_p)(HANDLER_PROTO);
void (*ps_w)(HANDLER_PROTO);
const void *ps_d;
} handlers[] = {
{ "/kern/clockrate", kern_clockrate, NULL, NULL },
{ "/kern/vnode", printother, NULL, "pstat" },
{ "/kern/proc(2|_args)?", printother, NULL, "ps" },
{ "/kern/file2?", printother, NULL, "pstat" },
{ "/kern/ntptime", printother, NULL,
"ntpdc -c kerninfo" },
{ "/kern/msgbuf", printother, NULL, "dmesg" },
{ "/kern/boottime", kern_boottime, NULL, NULL },
{ "/kern/consdev", kern_consdev, NULL, NULL },
{ "/kern/cp_time(/[0-9]+)?", kern_cp_time, NULL, NULL },
{ "/kern/sysvipc_info", printother, NULL, "ipcs" },
{ "/kern/cp_id(/[0-9]+)?", kern_cp_id, NULL, NULL },
{ "/kern/coredump/setid/mode", mode_bits, mode_bits, NULL },
{ "/kern/drivers", kern_drivers, NULL, NULL },
{ "/vm/vmmeter", printother, NULL,
"vmstat' or 'systat" },
{ "/vm/loadavg", vm_loadavg, NULL, NULL },
{ "/vm/uvmexp2?", printother, NULL,
"vmstat' or 'systat" },
{ "/vfs/nfs/nfsstats", printother, NULL, "nfsstat" },
{ "/net/inet6?/tcp6?/ident", printother, NULL, "identd" },
{ "/net/inet6/icmp6/nd6_[dp]rlist", printother, NULL, "ndp" },
{ "/net/key/dumps[ap]", printother, NULL, "setkey" },
{ "/net/[^/]+/[^/]+/pcblist", printother, NULL,
"netstat' or 'sockstat" },
{ "/net/(inet|inet6)/[^/]+/stats", printother, NULL, "netstat"},
{ "/net/bpf/(stats|peers)", printother, NULL, "netstat"},
{ "/net/inet.*/tcp.*/deb.*", printother, NULL, "trpt" },
{ "/net/inet.*/ip.*/anonportalgo/reserve", reserve, reserve, NULL },
{ "/net/ns/spp/deb.*", printother, NULL, "trsp" },
{ "/hw/diskstats", printother, NULL, "iostat" },
#ifdef CPU_CONSDEV
{ "/machdep/consdev", kern_consdev, NULL, NULL },
#endif /* CPU_CONSDEV */
#ifdef CPU_DISKINFO
{ "/machdep/diskinfo", machdep_diskinfo, NULL, NULL },
#endif /* CPU_CONSDEV */
{ "/proc/[^/]+/rlimit/[^/]+/[^/]+", proc_limit, proc_limit, NULL },
/*
* these will only be called when the given node has no children
*/
{ "/net/[^/]+", printother, NULL, NULL },
{ "/debug", printother, NULL, NULL },
{ "/ddb", printother, NULL, NULL },
{ "/vendor", printother, NULL, NULL },
{ NULL, NULL, NULL, NULL },
};
struct sysctlnode my_root = {
.sysctl_flags = SYSCTL_VERSION|CTLFLAG_ROOT|CTLTYPE_NODE,
sysc_init_field(_sysctl_size, sizeof(struct sysctlnode)),
.sysctl_num = 0,
.sysctl_name = "(prog_root)",
};
int Aflag, aflag, dflag, Mflag, nflag, qflag, rflag, wflag, xflag;
size_t nr;
char *fn;
int req, stale, errs;
FILE *warnfp = stderr;
#define MAXPORTS 0x10000
/*
* vah-riables n stuff
*/
char gsname[SYSCTL_NAMELEN * CTL_MAXNAME + CTL_MAXNAME],
canonname[SYSCTL_NAMELEN * CTL_MAXNAME + CTL_MAXNAME],
gdname[10 * CTL_MAXNAME + CTL_MAXNAME];
char sep[] = ".";
const char *eq = " = ";
const char *lname[] = {
"top", "second", "third", "fourth", "fifth", "sixth",
"seventh", "eighth", "ninth", "tenth", "eleventh", "twelfth"
};
/*
* you've heard of main, haven't you?
*/
int
main(int argc, char *argv[])
{
int name[CTL_MAXNAME];
int ch;
size_t lastcompiled = 0;
regex_t *re;
setprogname(argv[0]);
while ((ch = getopt(argc, argv, "Aabdef:Mnqrwx")) != -1) {
switch (ch) {
case 'A':
Aflag++;
break;
case 'a':
aflag++;
break;
case 'd':
dflag++;
break;
case 'e':
eq = "=";
break;
case 'f':
fn = optarg;
wflag++;
break;
case 'M':
Mflag++;
break;
case 'n':
nflag++;
break;
case 'q':
qflag++;
break;
case 'b': /* FreeBSD compat */
case 'r':
rflag++;
break;
case 'w':
wflag++;
break;
case 'x':
xflag++;
break;
default:
usage();
}
}
argc -= optind;
argv += optind;
if (xflag && rflag)
usage();
/* if ((xflag || rflag) && wflag)
usage(); */
/* if (aflag && (Mflag || qflag))
usage(); */
if ((aflag || Aflag) && qflag)
usage();
if ((Aflag || Mflag || dflag) && argc == 0 && fn == NULL)
aflag = 1;
if (prog_init && prog_init() == -1)
err(EXIT_FAILURE, "prog init failed");
if (Aflag)
warnfp = stdout;
stale = req = 0;
if ((re = malloc(sizeof(*re) * __arraycount(handlers))) == NULL)
err(EXIT_FAILURE, "malloc regex");
if (aflag) {
print_tree(&name[0], 0, NULL, CTLTYPE_NODE, 1,
re, &lastcompiled);
/* if (argc == 0) */
return (0);
}
if (fn) {
FILE *fp;
char *l;
fp = fopen(fn, "r");
if (fp == NULL) {
err(EXIT_FAILURE, "%s", fn);
} else {
nr = 0;
while ((l = fparseln(fp, NULL, &nr, NULL, 0)) != NULL)
{
if (*l) {
parse(l, re, &lastcompiled);
free(l);
}
}
fclose(fp);
}
return errs ? 1 : 0;
}
if (argc == 0)
usage();
while (argc-- > 0)
parse(*argv++, re, &lastcompiled);
return errs ? EXIT_FAILURE : EXIT_SUCCESS;
}
/*
* ********************************************************************
* how to find someone special to handle the reading (or maybe even
* writing) of a particular node
* ********************************************************************
*/
static const struct handlespec *
findhandler(const char *s, regex_t *re, size_t *lastcompiled)
{
const struct handlespec *p;
size_t i, l;
int j;
char eb[64];
regmatch_t match;
p = &handlers[0];
l = strlen(s);
for (i = 0; p[i].ps_re != NULL; i++) {
if (i >= *lastcompiled) {
j = regcomp(&re[i], p[i].ps_re, REG_EXTENDED);
if (j != 0) {
regerror(j, &re[i], eb, sizeof(eb));
errx(EXIT_FAILURE, "regcomp: %s: %s", p[i].ps_re, eb);
}
*lastcompiled = i + 1;
}
j = regexec(&re[i], s, 1, &match, 0);
if (j == 0) {
if (match.rm_so == 0 && match.rm_eo == (int)l)
return &p[i];
}
else if (j != REG_NOMATCH) {
regerror(j, &re[i], eb, sizeof(eb));
errx(EXIT_FAILURE, "regexec: %s: %s", p[i].ps_re, eb);
}
}
return NULL;
}
/*
* after sysctlgetmibinfo is done with the name, we convert all
* separators to / and stuff one at the front if it was missing
*/
static void
canonicalize(const char *i, char *o)
{
const char *t;
char p[SYSCTL_NAMELEN + 1];
int l;
if (i[0] != *sep) {
o[0] = '/';
o[1] = '\0';
}
else
o[0] = '\0';
t = i;
do {
i = t;
t = strchr(i, sep[0]);
if (t == NULL)
strcat(o, i);
else {
l = t - i;
t++;
memcpy(p, i, l);
p[l] = '\0';
strcat(o, p);
strcat(o, "/");
}
} while (t != NULL);
}
/*
* ********************************************************************
* convert this special number to a special string so we can print the
* mib
* ********************************************************************
*/
static const char *
sf(u_int f)
{
static char s[256];
const char *c;
s[0] = '\0';
c = "";
#define print_flag(_f, _s, _c, _q, _x) \
if (((_f) & (__CONCAT(CTLFLAG_,_x))) == (__CONCAT(CTLFLAG_,_q))) { \
strlcat((_s), (_c), sizeof(_s)); \
strlcat((_s), __STRING(_q), sizeof(_s)); \
(_c) = ","; \
(_f) &= ~(__CONCAT(CTLFLAG_,_x)); \
}
print_flag(f, s, c, READONLY, READWRITE);
print_flag(f, s, c, READWRITE, READWRITE);
print_flag(f, s, c, ANYWRITE, ANYWRITE);
print_flag(f, s, c, PRIVATE, PRIVATE);
print_flag(f, s, c, PERMANENT, PERMANENT);
print_flag(f, s, c, OWNDATA, OWNDATA);
print_flag(f, s, c, IMMEDIATE, IMMEDIATE);
print_flag(f, s, c, HEX, HEX);
print_flag(f, s, c, ROOT, ROOT);
print_flag(f, s, c, ANYNUMBER, ANYNUMBER);
print_flag(f, s, c, HIDDEN, HIDDEN);
print_flag(f, s, c, ALIAS, ALIAS);
#undef print_flag
if (f) {
char foo[9];
snprintf(foo, sizeof(foo), "%x", f);
strlcat(s, c, sizeof(s));
strlcat(s, foo, sizeof(s));
}
return (s);
}
static const char *
st(u_int t)
{
switch (t) {
case CTLTYPE_NODE:
return "NODE";
case CTLTYPE_INT:
return "INT";
case CTLTYPE_STRING:
return "STRING";
case CTLTYPE_QUAD:
return "QUAD";
case CTLTYPE_STRUCT:
return "STRUCT";
case CTLTYPE_BOOL:
return "BOOL";
}
return "???";
}
/*
* ********************************************************************
* recursively eliminate all data belonging to the given node
* ********************************************************************
*/
static void
purge_tree(struct sysctlnode *rnode)
{
struct sysctlnode *node;
if (rnode == NULL ||
SYSCTL_TYPE(rnode->sysctl_flags) != CTLTYPE_NODE ||
rnode->sysctl_child == NULL)
return;
for (node = rnode->sysctl_child;
node < &rnode->sysctl_child[rnode->sysctl_clen];
node++)
purge_tree(node);
free(rnode->sysctl_child);
rnode->sysctl_csize = 0;
rnode->sysctl_clen = 0;
rnode->sysctl_child = NULL;
if (rnode->sysctl_desc == (const char*)-1)
rnode->sysctl_desc = NULL;
if (rnode->sysctl_desc != NULL)
free(__UNCONST(rnode->sysctl_desc));
rnode->sysctl_desc = NULL;
}
static void __attribute__((__format__(__printf__, 3, 4)))
appendprintf(char **bp, size_t *lbp, const char *fmt, ...)
{
int r;
va_list ap;
va_start(ap, fmt);
r = vsnprintf(*bp, *lbp, fmt, ap);
va_end(ap);
if (r < 0 || (size_t)r > *lbp)
r = *lbp;
*bp += r;
*lbp -= r;
}
/*
* ********************************************************************
* print this node and any others underneath it
* ********************************************************************
*/
static void
print_tree(int *name, u_int namelen, struct sysctlnode *pnode, u_int type,
int add, regex_t *re, size_t *lastcompiled)
{
struct sysctlnode *node;
int rc;
size_t ni, sz, ldp, lsp;
char *sp, *dp, *tsp, *tdp;
const struct handlespec *p;
sp = tsp = &gsname[strlen(gsname)];
dp = tdp = &gdname[strlen(gdname)];
ldp = sizeof(gdname) - (dp - gdname);
lsp = sizeof(gsname) - (sp - gsname);
if (sp != &gsname[0] && dp == &gdname[0]) {
/*
* aw...shucks. now we must play catch up
*/
for (ni = 0; ni < namelen; ni++)
appendprintf(&tdp, &ldp, "%s%d", ni > 0 ? "." : "",
name[ni]);
}
if (pnode == NULL)
pnode = &my_root;
else if (add) {
appendprintf(&tsp, &lsp, "%s%s", namelen > 1 ? sep : "",
pnode->sysctl_name);
appendprintf(&tdp, &ldp, "%s%d", namelen > 1 ? "." : "",
pnode->sysctl_num);
}
if (Mflag && pnode != &my_root) {
if (nflag)
printf("%s: ", gdname);
else
printf("%s (%s): ", gsname, gdname);
printf("CTLTYPE_%s", st(type));
if (type == CTLTYPE_NODE) {
if (SYSCTL_FLAGS(pnode->sysctl_flags) & CTLFLAG_ALIAS)
printf(", alias %d",
pnode->sysctl_alias);
else
printf(", children %d/%d",
pnode->sysctl_clen,
pnode->sysctl_csize);
}
printf(", size %zu", pnode->sysctl_size);
printf(", flags 0x%x<%s>",
SYSCTL_FLAGS(pnode->sysctl_flags),
sf(SYSCTL_FLAGS(pnode->sysctl_flags)));
if (pnode->sysctl_func)
printf(", func=%p", pnode->sysctl_func);
printf(", ver=%d", pnode->sysctl_ver);
printf("\n");
if (type != CTLTYPE_NODE) {
*sp = *dp = '\0';
return;
}
}
if (dflag && pnode != &my_root) {
if (Aflag || type != CTLTYPE_NODE) {
if (pnode->sysctl_desc == NULL)
getdesc1(name, namelen, pnode);
if (Aflag || !add ||
(pnode->sysctl_desc != NULL &&
pnode->sysctl_desc != (const char*)-1)) {
if (!nflag)
printf("%s: ", gsname);
if (pnode->sysctl_desc == NULL ||
pnode->sysctl_desc == (const char*)-1)
printf("(no description)\n");
else
printf("%s\n", pnode->sysctl_desc);
}
}
if (type != CTLTYPE_NODE) {
*sp = *dp = '\0';
return;
}
}
/*
* if this is an alias and we added our name, that means we
* got here by recursing down into the tree, so skip it. The
* only way to print an aliased node is with either -M or by
* name specifically.
*/
if (SYSCTL_FLAGS(pnode->sysctl_flags) & CTLFLAG_ALIAS && add) {
*sp = *dp = '\0';
return;
}
canonicalize(gsname, canonname);
p = findhandler(canonname, re, lastcompiled);
if (type != CTLTYPE_NODE && p != NULL) {
if (p->ps_p == NULL) {
sysctlperror("Cannot print `%s': %s\n", gsname,
strerror(EOPNOTSUPP));
exit(EXIT_FAILURE);
}
(*p->ps_p)(gsname, gdname, NULL, name, namelen, pnode, type,
__UNCONST(p->ps_d));
*sp = *dp = '\0';
return;
}
if (type != CTLTYPE_NODE && pnode->sysctl_size == 0) {
rc = prog_sysctl(&name[0], namelen, NULL, &sz, NULL, 0);
if (rc == -1) {
sysctlerror(1);
*sp = *dp = '\0';
return;
}
if (sz == 0) {
if ((Aflag || req) && !Mflag)
printf("%s: node contains no data\n", gsname);
*sp = *dp = '\0';
return;
}
}
else
sz = pnode->sysctl_size;
switch (type) {
case CTLTYPE_NODE: {
__learn_tree(name, namelen, pnode);
node = pnode->sysctl_child;
if (node == NULL) {
if (dflag)
/* do nothing */;
else if (p != NULL)
(*p->ps_p)(gsname, gdname, NULL, name, namelen,
pnode, type, __UNCONST(p->ps_d));
else if ((Aflag || req) && !Mflag)
printf("%s: no children\n", gsname);
}
else {
if (dflag)
/*
* get all descriptions for next level
* in one chunk
*/
getdesc(name, namelen, pnode);
req = 0;
for (ni = 0; ni < pnode->sysctl_clen; ni++) {
name[namelen] = node[ni].sysctl_num;
if ((node[ni].sysctl_flags & CTLFLAG_HIDDEN) &&
!(Aflag || req))
continue;
print_tree(name, namelen + 1, &node[ni],
SYSCTL_TYPE(node[ni].sysctl_flags),
1, re, lastcompiled);
}
}
break;
}
case CTLTYPE_INT: {
int i;
rc = prog_sysctl(name, namelen, &i, &sz, NULL, 0);
if (rc == -1) {
sysctlerror(1);
break;
}
display_number(pnode, gsname, &i, sizeof(i), DISPLAY_VALUE);
break;
}
case CTLTYPE_BOOL: {
bool b;
rc = prog_sysctl(name, namelen, &b, &sz, NULL, 0);
if (rc == -1) {
sysctlerror(1);
break;
}
display_number(pnode, gsname, &b, sizeof(b), DISPLAY_VALUE);
break;
}
case CTLTYPE_STRING: {
unsigned char buf[1024], *tbuf;
tbuf = buf;
sz = sizeof(buf);
rc = prog_sysctl(&name[0], namelen, tbuf, &sz, NULL, 0);
if (rc == -1 && errno == ENOMEM) {
tbuf = malloc(sz);
if (tbuf == NULL) {
sysctlerror(1);
break;
}
rc = prog_sysctl(&name[0], namelen, tbuf, &sz, NULL, 0);
}
if (rc == -1)
sysctlerror(1);
else
display_string(pnode, gsname, tbuf, sz, DISPLAY_VALUE);
if (tbuf != buf)
free(tbuf);
break;
}
case CTLTYPE_QUAD: {
u_quad_t q;
sz = sizeof(q);
rc = prog_sysctl(&name[0], namelen, &q, &sz, NULL, 0);
if (rc == -1) {
sysctlerror(1);
break;
}
display_number(pnode, gsname, &q, sizeof(q), DISPLAY_VALUE);
break;
}
case CTLTYPE_STRUCT: {
/*
* we shouldn't actually get here, but if we
* do, would it be nice to have *something* to
* do other than completely ignore the
* request.
*/
unsigned char *d;
if ((d = malloc(sz)) == NULL) {
fprintf(warnfp, "%s: !malloc failed!\n", gsname);
break;
}
rc = prog_sysctl(&name[0], namelen, d, &sz, NULL, 0);
if (rc == -1) {
sysctlerror(1);
break;
}
display_struct(pnode, gsname, d, sz, DISPLAY_VALUE);
free(d);
break;
}
default:
/* should i print an error here? */
break;
}
*sp = *dp = '\0';
}
/*
* ********************************************************************
* parse a request, possibly determining that it's a create or destroy
* request
* ********************************************************************
*/
static void
parse(char *l, regex_t *re, size_t *lastcompiled)
{
struct sysctlnode *node;
const struct handlespec *w;
int name[CTL_MAXNAME], dodesc = 0;
u_int namelen, type;
char *key, *value, *dot;
size_t sz;
bool optional = false;
req = 1;
key = l;
if ((value = strchr(l, '=')) != NULL) {
if (value > l && value[-1] == '?') {
value[-1] = '\0';
optional = true;
}
*value++ = '\0';
}
if ((dot = strpbrk(key, "./")) == NULL)
sep[0] = '.';
else
sep[0] = dot[0];
sep[1] = '\0';
while (key[0] == sep[0] && key[1] == sep[0]) {
if (value != NULL)
value[-1] = '=';
if (strncmp(key + 2, "create", 6) == 0 &&
(key[8] == '=' || key[8] == sep[0]))
parse_create(key + 8 + (key[8] == '=' ? 1 : 0));
else if (strncmp(key + 2, "destroy", 7) == 0 &&
(key[9] == '=' || key[9] == sep[0]))
parse_destroy(key + 9 + (key[9] == '=' ? 1 : 0));
else if (strncmp(key + 2, "describe", 8) == 0 &&
(key[10] == '=' || key[10] == sep[0])) {
key += 10 + (key[10] == '=');
if ((value = strchr(key, '=')) != NULL)
parse_describe(key);
else {
if (!dflag)
dodesc = 1;
break;
}
}
else
sysctlperror("unable to parse '%s'\n", key);
return;
}
if (stale) {
purge_tree(&my_root);
stale = 0;
}
node = &my_root;
namelen = CTL_MAXNAME;
sz = sizeof(gsname);
if (sysctlgetmibinfo(key, &name[0], &namelen, gsname, &sz, &node,
SYSCTL_VERSION) == -1) {
if (optional)
return;
sysctlparseerror(namelen, l);
EXIT(EXIT_FAILURE);
}
type = SYSCTL_TYPE(node->sysctl_flags);
if (value == NULL) {
if (dodesc)
dflag = 1;
print_tree(&name[0], namelen, node, type, 0, re, lastcompiled);
if (dodesc)
dflag = 0;
gsname[0] = '\0';
return;
}
if (fn)
trim_whitespace(value, 1);
if (!wflag) {
sysctlperror("Must specify -w to set variables\n");
exit(EXIT_FAILURE);
}
canonicalize(gsname, canonname);
if (type != CTLTYPE_NODE && (w = findhandler(canonname, re,
lastcompiled)) != NULL) {
if (w->ps_w == NULL) {
sysctlperror("Cannot write `%s': %s\n", gsname,
strerror(EOPNOTSUPP));
exit(EXIT_FAILURE);
}
(*w->ps_w)(gsname, gdname, value, name, namelen, node, type,
__UNCONST(w->ps_d));
gsname[0] = '\0';
return;
}
switch (type) {
case CTLTYPE_NODE:
/*
* XXX old behavior is to print. should we error instead?
*/
print_tree(&name[0], namelen, node, CTLTYPE_NODE, 1, re,
lastcompiled);
break;
case CTLTYPE_INT:
case CTLTYPE_BOOL:
case CTLTYPE_QUAD:
write_number(&name[0], namelen, node, value);
break;
case CTLTYPE_STRING:
write_string(&name[0], namelen, node, value);
break;
case CTLTYPE_STRUCT:
/*
* XXX old behavior is to print. should we error instead?
*/
/* fprintf(warnfp, "you can't write to %s\n", gsname); */
print_tree(&name[0], namelen, node, type, 0, re, lastcompiled);
break;
}
}
/*
//create=foo.bar.whatever...,
[type=(int|quad|string|struct|node),]
[size=###,]
[n=###,]
[flags=(iohxparw12),]
[addr=0x####,|symbol=...|value=...]
size is optional for some types. type must be set before anything
else. nodes can have [rwhp], but nothing else applies. if no
size or type is given, node is asserted. writeable is the default,
with [rw] being read-only and unconditionally writeable
respectively. if you specify addr, it is assumed to be the name of
a kernel symbol, if value, CTLFLAG_OWNDATA will be asserted for
strings, CTLFLAG_IMMEDIATE for ints and u_quad_ts. you cannot
specify both value and addr.
*/
static void
parse_create(char *l)
{
struct sysctlnode node;
size_t sz;
char *nname, *key, *value, *data, *addr, *c, *t;
int name[CTL_MAXNAME], i, rc, method, flags, rw;
u_int namelen, type;
u_quad_t uq;
quad_t q;
bool b;
if (!wflag) {
sysctlperror("Must specify -w to create nodes\n");
exit(EXIT_FAILURE);
}
/*
* these are the pieces that make up the description of a new
* node
*/
memset(&node, 0, sizeof(node));
node.sysctl_num = CTL_CREATE; /* any number is fine */
flags = 0;
rw = -1;