changes for 4.4BSD-Lite requested by USL

[unix-history] / usr / src / bin / ps / nlist.c

/*-
* Copyright (c) 1990, 1993
*      The Regents of the University of California.  All rights reserved.
*
* %sccs.include.redist.c%
*/

#ifndef lint
static char sccsid[] = "@(#)nlist.c     8.2 (Berkeley) %G%";
#endif /* not lint */

#include <sys/param.h>
#include <sys/time.h>
#include <sys/proc.h>
#include <sys/resource.h>

#include <err.h>
#include <errno.h>
#include <kvm.h>
#include <nlist.h>
#include <stdio.h>
#include <string.h>

#include "ps.h"

#ifdef P_PPWAIT
#define NEWVM
#endif

struct  nlist psnl[] = {
       {"_fscale"},
#define X_FSCALE        0
       {"_ccpu"},
#define X_CCPU          1
#ifdef NEWVM
       {"_avail_start"},
#define X_AVAILSTART    2
       {"_avail_end"},
#define X_AVAILEND      3
#else
       {"_ecmx"},
#define X_ECMX          2
#endif
       {NULL}
};

fixpt_t ccpu;                           /* kernel _ccpu variable */
int     nlistread;                      /* if nlist already read. */
int     mempages;                       /* number of pages of phys. memory */
int     fscale;                         /* kernel _fscale variable */

extern kvm_t *kd;

#define kread(x, v) \
       kvm_read(kd, psnl[x].n_value, (char *)&v, sizeof v) != sizeof(v)

int
donlist()
{
       extern int eval;
       int rval;
#ifdef NEWVM
       int tmp;
#endif

       rval = 0;
       nlistread = 1;
       if (kvm_nlist(kd, psnl)) {
               nlisterr(psnl);
               eval = 1;
               return (1);
       }
       if (kread(X_FSCALE, fscale)) {
               warnx("fscale: %s", kvm_geterr(kd));
               eval = rval = 1;
       }
#ifdef NEWVM
       if (kread(X_AVAILEND, mempages)) {
               warnx("avail_start: %s", kvm_geterr(kd));
               eval = rval = 1;
       }
       if (kread(X_AVAILSTART, tmp)) {
               warnx("avail_end: %s", kvm_geterr(kd));
               eval = rval = 1;
       }
       mempages -= tmp;
#else
       if (kread(X_ECMX, mempages)) {
               warnx("ecmx: %s", kvm_geterr(kd));
               eval = rval = 1;
       }
#endif
       if (kread(X_CCPU, ccpu)) {
               warnx("ccpu: %s", kvm_geterr(kd));
               eval = rval = 1;
       }
       return (rval);
}

void
nlisterr(nl)
       struct nlist nl[];
{
       int i;

       (void)fprintf(stderr, "ps: nlist: can't find following symbols:");
       for (i = 0; nl[i].n_name != NULL; i++)
               if (nl[i].n_value == 0)
                       (void)fprintf(stderr, " %s", nl[i].n_name);
       (void)fprintf(stderr, "\n");
}