Date: Wed, 31 Oct 2001 13:22:47 +0200 From: Peter Pentchev <roam@ringlet.net> To: arch@FreeBSD.org Cc: audit@FreeBSD.org Subject: Re: sysctl(8) enhancement: display sysctl MIB's Message-ID: <20011031132247.B13366@straylight.oblivion.bg> In-Reply-To: <20010723140620.A52175@ringworld.oblivion.bg>; from roam@orbitel.bg on Mon, Jul 23, 2001 at 02:06:20PM %2B0300 References: <20010723004034.I882@ringworld.oblivion.bg> <20010723104201.855893E2F@bazooka.unixfreak.org> <20010723140620.A52175@ringworld.oblivion.bg>
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Hi,
Here's the patch to the updated sysctl sources after Anton Berezin
added the '-e' option.
For those who have missed the previous discussion, this patch adds
a new '-m' option which displays the MIB's before the sysctl names.
E.g.
[roam@straylight:v4 ~/fbsd/r/src/sbin/sysctl]$ ./sysctl net.local
net.local.stream.sendspace: 8192
net.local.stream.recvspace: 8192
net.local.dgram.maxdgram: 2048
net.local.dgram.recvspace: 4096
net.local.inflight: 0
[roam@straylight:v4 ~/fbsd/r/src/sbin/sysctl]$ ./sysctl -m net.local
4.1.1.155 net.local.stream.sendspace: 8192
4.1.1.156 net.local.stream.recvspace: 8192
4.1.2.157 net.local.dgram.maxdgram: 2048
4.1.2.158 net.local.dgram.recvspace: 4096
4.1.159 net.local.inflight: 0
[roam@straylight:v4 ~/fbsd/r/src/sbin/sysctl]$
G'luck,
Peter
--
What would this sentence be like if pi were 3?
Index: src/sbin/sysctl/sysctl.8
===================================================================
RCS file: /home/ncvs/src/sbin/sysctl/sysctl.8,v
retrieving revision 1.39
diff -u -r1.39 sysctl.8
--- src/sbin/sysctl/sysctl.8 30 Oct 2001 20:15:32 -0000 1.39
+++ src/sbin/sysctl/sysctl.8 31 Oct 2001 09:40:46 -0000
@@ -40,11 +40,11 @@
.Nd get or set kernel state
.Sh SYNOPSIS
.Nm
-.Op Fl beNnox
+.Op Fl bemNnox
.Ar name Ns Op = Ns Ar value
.Ar ...
.Nm
-.Op Fl beNnox
+.Op Fl bemNnox
.Fl a
.Sh DESCRIPTION
The
@@ -81,6 +81,11 @@
or
.Fl n
is specified, or a variable is being set.
+.It Fl m
+Specify that the MIB numerical value should be printed before the name.
+This option is ignored if
+.Fl n
+is specified.
.It Fl N
Show only variable names, not their values.
This is particularly useful with shells that offer programmable
Index: src/sbin/sysctl/sysctl.c
===================================================================
RCS file: /home/ncvs/src/sbin/sysctl/sysctl.c,v
retrieving revision 1.38
diff -u -r1.38 sysctl.c
--- src/sbin/sysctl/sysctl.c 30 Oct 2001 20:15:32 -0000 1.38
+++ src/sbin/sysctl/sysctl.c 31 Oct 2001 09:51:47 -0000
@@ -58,10 +58,11 @@
#include <string.h>
#include <unistd.h>
-static int aflag, bflag, eflag, Nflag, nflag, oflag, xflag;
+static int aflag, bflag, eflag, mflag, Nflag, nflag, oflag, xflag;
static int oidfmt(int *, int, char *, u_int *);
static void parse(char *);
+static int show_varname(const char *, const int *, int);
static int show_var(int *, int);
static int sysctl_all (int *oid, int len);
static int name2oid(char *, int *);
@@ -71,8 +72,8 @@
{
(void)fprintf(stderr, "%s\n%s\n",
- "usage: sysctl [-beNnox] variable[=value] ...",
- " sysctl [-beNnox] -a");
+ "usage: sysctl [-bemNnox] variable[=value] ...",
+ " sysctl [-bemNnox] -a");
exit(1);
}
@@ -83,7 +84,7 @@
setbuf(stdout,0);
setbuf(stderr,0);
- while ((ch = getopt(argc, argv, "AabeNnowxX")) != -1) {
+ while ((ch = getopt(argc, argv, "AabemNnowxX")) != -1) {
switch (ch) {
case 'A':
/* compatibility */
@@ -98,6 +99,9 @@
case 'e':
eflag = 1;
break;
+ case 'm':
+ mflag = 1;
+ break;
case 'N':
Nflag = 1;
break;
@@ -372,6 +376,29 @@
}
/*
+ * This formats and outputs the name of one variable.
+ * If the -m command-line flag was specified, the MIB value
+ * is also output.
+ */
+
+static int
+show_varname(const char *name, const int *oid, int len)
+{
+ int i;
+
+ if (nflag)
+ return;
+
+ if (mflag) {
+ for (i = 0; i < len - 1; i++)
+ printf("%X.", oid[i]);
+ printf("%X ", oid[i]);
+ }
+
+ printf("%s%s", name, eflag? "=": ": ");
+}
+
+/*
* This formats and outputs the value of one variable
*
* Returns zero if anything was actually output.
@@ -383,7 +410,7 @@
show_var(int *oid, int nlen)
{
u_char buf[BUFSIZ], *val, *p;
- char name[BUFSIZ], *fmt, *sep;
+ char name[BUFSIZ], *fmt;
int qoid[CTL_MAXNAME+2];
int i;
size_t j, len;
@@ -400,15 +427,10 @@
err(1, "sysctl name %d %d %d", i, j, errno);
if (Nflag) {
- printf("%s", name);
+ show_varname(name, oid, nlen);
return (0);
}
- if (eflag)
- sep = "=";
- else
- sep = ": ";
-
/* find an estimate of how much we need for this var */
j = 0;
i = sysctl(oid, nlen, 0, &j, 0, 0);
@@ -438,14 +460,12 @@
p = val;
switch (*fmt) {
case 'A':
- if (!nflag)
- printf("%s%s", name, sep);
+ show_varname(name, oid, nlen);
printf("%s", p);
return (0);
case 'I':
- if (!nflag)
- printf("%s%s", name, sep);
+ show_varname(name, oid, nlen);
fmt++;
val = "";
while (len >= sizeof(int)) {
@@ -460,8 +480,7 @@
return (0);
case 'L':
- if (!nflag)
- printf("%s%s", name, sep);
+ show_varname(name, oid, nlen);
fmt++;
val = "";
while (len >= sizeof(long)) {
@@ -476,8 +495,7 @@
return (0);
case 'P':
- if (!nflag)
- printf("%s%s", name, sep);
+ show_varname(name, oid, nlen);
printf("%p", *(void **)p);
return (0);
@@ -495,16 +513,14 @@
else
func = NULL;
if (func) {
- if (!nflag)
- printf("%s%s", name, sep);
+ show_varname(name, oid, nlen);
return ((*func)(len, p));
}
/* FALL THROUGH */
default:
if (!oflag && !xflag)
return (1);
- if (!nflag)
- printf("%s%s", name, sep);
+ show_varname(name, oid, nlen);
printf("Format:%s Length:%d Dump:0x", fmt, len);
while (len-- && (xflag || p < val + 16))
printf("%02x", *p++);
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