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o Make systat/vmstat.c use sysctl() to retrieve cp_time, bufspace,

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maxvnodes, numvnodes, freevnodes, nchstats, and numdirtybuffers.
o Make the hw.ncpu error checking code a little more rigorous by
  sanity checking the returned data size.
o Didn't fix machine-dependent non-sysctl-exported variables:
  intrnames, eintrnames, intrcnt, eintrcnt, as these variables are
  defined and exported from machine-dependent kernel code in
  assembly.  This should probably be fixed somehow.
This commit is contained in:
Robert Watson 2000-11-25 03:53:42 +00:00
parent 00df22775a
commit c3a2720353
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=69143
1 changed files with 50 additions and 29 deletions
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79
usr.bin/systat/vmstat.c
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@ -143,30 +143,16 @@ closekre(w)
static struct nlist namelist[] = {
#define X_CPTIME 0
{ "_cp_time" },
#define X_CNT 1
#define X_CNT 0
{ "_cnt" },
#define X_BUFFERSPACE 2
{ "_bufspace" },
#define X_NCHSTATS 3
{ "_nchstats" },
#define X_INTRNAMES 4
#define X_INTRNAMES 1
{ "_intrnames" },
#define X_EINTRNAMES 5
#define X_EINTRNAMES 2
{ "_eintrnames" },
#define X_INTRCNT 6
#define X_INTRCNT 3
{ "_intrcnt" },
#define X_EINTRCNT 7
#define X_EINTRCNT 4
{ "_eintrcnt" },
#define X_DESIREDVNODES 8
{ "_desiredvnodes" },
#define X_NUMVNODES 9
{ "_numvnodes" },
#define X_FREEVNODES 10
{ "_freevnodes" },
#define X_NUMDIRTYBUFFERS 11
{ "_numdirtybuffers" },
{ "" },
};
@ -730,18 +716,52 @@ getinfo(s, st)
enum state st;
{
struct devinfo *tmp_dinfo;
int mib[2], size;
size_t len;
int mib[2], size, err;
len = sizeof(s->time);
err = sysctlbyname("kern.cp_time", &s->time, &len, NULL, 0);
if (err || len != sizeof(s->time))
perror("kern.cp_time");
len = sizeof(cur.cp_time);
err = sysctlbyname("kern.cp_time", &cur.cp_time, &len, NULL, 0);
if (err || len != sizeof(cur.cp_time))
perror("kern.cp_time");
NREAD(X_CPTIME, s->time, sizeof s->time);
NREAD(X_CPTIME, cur.cp_time, sizeof(cur.cp_time));
NREAD(X_CNT, &s->Cnt, sizeof s->Cnt);
NREAD(X_BUFFERSPACE, &s->bufspace, sizeof(s->bufspace));
NREAD(X_DESIREDVNODES, &s->desiredvnodes, sizeof(s->desiredvnodes));
NREAD(X_NUMVNODES, &s->numvnodes, LONG);
NREAD(X_FREEVNODES, &s->freevnodes, LONG);
NREAD(X_NCHSTATS, &s->nchstats, sizeof s->nchstats);
len = sizeof(s->bufspace);
err = sysctlbyname("vfs.bufspace", &s->bufspace, &len, NULL, 0);
if (err || len != sizeof(s->bufspace))
perror("vfs.bufspace");
len = sizeof(s->desiredvnodes);
err = sysctlbyname("kern.maxvnodes", &s->desiredvnodes, &len, NULL, 0);
if (err || len != sizeof(s->desiredvnodes))
perror("kern.maxvnodes");
len = sizeof(s->numvnodes);
err = sysctlbyname("debug.numvnodes", &s->numvnodes, &len, NULL, 0);
if (err || len != sizeof(s->numvnodes))
perror("debug.numvnodes");
len = sizeof(s->freevnodes);
err = sysctlbyname("debug.freevnodes", &s->freevnodes, &len, NULL, 0);
if (err || len != sizeof(s->freevnodes))
perror("debug.freevnodes");
len = sizeof(s->nchstats);
err = sysctlbyname("vfs.cache.nchstats", &s->nchstats, &len, NULL, 0);
if (err || len != sizeof(s->nchstats))
perror("vfs.cache.nchstats");
NREAD(X_INTRCNT, s->intrcnt, nintr * LONG);
NREAD(X_NUMDIRTYBUFFERS, &s->numdirtybuffers, sizeof(s->numdirtybuffers));
len = sizeof(s->numdirtybuffers);
err = sysctlbyname("vfs.numdirtybuffers", &s->numdirtybuffers, &len,
NULL, 0);
size = sizeof(s->Total);
mib[0] = CTL_VM;
mib[1] = VM_METER;
@ -750,7 +770,8 @@ getinfo(s, st)
bzero(&s->Total, sizeof(s->Total));
}
size = sizeof(ncpu);
if (sysctlbyname("hw.ncpu", &ncpu, &size, NULL, 0) < 0)
if (sysctlbyname("hw.ncpu", &ncpu, &size, NULL, 0) < 0 ||
size != sizeof(ncpu))
ncpu = 1;
tmp_dinfo = last.dinfo;