d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Add a sysctl MIB 'kern.env', that dumps the contents of the kernel

Browse Source 
environment from the loader, as well as the kernel's compiled in static
hints.
This commit is contained in:
Jonathan Lemon 2001-09-20 20:09:37 +00:00
parent 884748cf55
commit e492f03505
1 changed files with 25 additions and 26 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

51
sys/kern/kern_environment.c
View File

@ -41,6 +41,7 @@
#include <sys/systm.h>
#include <sys/sysctl.h>
#include <sys/libkern.h>
#include <sys/sbuf.h>
char *kern_envp;
@ -104,35 +105,33 @@ getenv_quad(const char *name, quad_t *data)
static int
sysctl_kernenv(SYSCTL_HANDLER_ARGS)
{
int *name = (int *)arg1;
u_int namelen = arg2;
char *cp;
int i, error;
const char *header[] = {
"---Loader Environment---", "---Static Environment---" };
const int headerlen = 128; /* conservative */
struct sbuf *sb;
int error, len;
char *cp;
if (kern_envp == NULL)
return(ENOENT);
name++;
namelen--;
if (namelen != 1)
return(EINVAL);
cp = kern_envp;
for (i = 0; i < name[0]; i++) {
cp = kernenv_next(cp);
if (cp == NULL)
break;
}
if (cp == NULL)
return(ENOENT);
error = SYSCTL_OUT(req, cp, strlen(cp) + 1);
return (error);
len = 0;
for (cp = kern_envp; cp != NULL; cp = kernenv_next(cp))
len += strlen(cp) + 1;
for (cp = static_hints; cp != NULL; cp = kernenv_next(cp))
len += strlen(cp) + 1;
sb = sbuf_new(NULL, NULL, len + headerlen, 0);
sbuf_printf(sb, "\n%s\n", header[0]);
for (cp = kern_envp; cp != NULL; cp = kernenv_next(cp))
sbuf_printf(sb, "%s\n", cp);
sbuf_printf(sb, "\n%s\n", header[1]);
for (cp = static_hints; cp != NULL; cp = kernenv_next(cp))
sbuf_printf(sb, "%s\n", cp);
sbuf_finish(sb);
error = SYSCTL_OUT(req, sbuf_data(sb), sbuf_len(sb));
sbuf_delete(sb);
return (error);
}
SYSCTL_NODE(_kern, OID_AUTO, environment, CTLFLAG_RD, sysctl_kernenv, "kernel environment space");
SYSCTL_OID(_kern, OID_AUTO, env, CTLTYPE_STRING | CTLFLAG_RD,
NULL, 0, sysctl_kernenv, "A", "Kernel environment");
/*
* Find the next entry after the one which (cp) falls within, return a