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[unix-history] / usr / src / usr.bin / systat / disks.c

/*-
* Copyright (c) 1980, 1992, 1993
*      The Regents of the University of California.  All rights reserved.
*
* %sccs.include.redist.c%
*/

#ifndef lint
static char sccsid[] = "@(#)disks.c     8.1 (Berkeley) %G%";
#endif /* not lint */

#include <sys/types.h>
#include <sys/buf.h>

#include <nlist.h>
#include <ctype.h>
#include <paths.h>
#include <string.h>
#include <stdlib.h>
#include "systat.h"
#include "extern.h"

static void dkselect __P((char *, int, int []));
static int read_names __P((void));

static struct nlist namelist[] = {
#define X_DK_NDRIVE     0
       { "_dk_ndrive" },
#define X_DK_WPMS       1
       { "_dk_wpms" },
#ifdef vax
#define X_MBDINIT       (X_DK_WPMS+1)
       { "_mbdinit" },
#define X_UBDINIT       (X_DK_WPMS+2)
       { "_ubdinit" },
#endif
#ifdef sun
#define X_MBDINIT       (X_DK_WPMS+1)
       { "_mbdinit" },
#endif
#ifdef tahoe
#define X_VBDINIT       (X_DK_WPMS+1)
       { "_vbdinit" },
#endif
#if defined(hp300) || defined(luna68k)
#define X_HPDINIT       (X_DK_WPMS+1)
       { "_hp_dinit" }, 
#endif
#ifdef mips
#define X_SCSI_DINIT    (X_DK_WPMS+1)
       { "_scsi_dinit" },
#endif
       { "" },
};

float *dk_mspw;
int dk_ndrive, *dk_select;
char **dr_name;

#include "names.c"                                      /* XXX */

int
dkinit()
{
       register int i;
       register char *cp;
       static int once = 0;
       static char buf[1024];

       if (once)
               return(1);

       if (kvm_nlist(kd, namelist)) {
               nlisterr(namelist);
               return(0);
       }
       if (namelist[X_DK_NDRIVE].n_value == 0) {
               error("dk_ndrive undefined in kernel");
               return(0);
       }
       NREAD(X_DK_NDRIVE, &dk_ndrive, LONG);
       if (dk_ndrive <= 0) {
               error("dk_ndrive=%d according to %s", dk_ndrive, _PATH_UNIX);
               return(0);
       }
       dk_mspw = (float *)calloc(dk_ndrive, sizeof (float));
       {
               long *wpms = (long *)calloc(dk_ndrive, sizeof(long));
               KREAD(NPTR(X_DK_WPMS), wpms, dk_ndrive * sizeof (long));
               for (i = 0; i < dk_ndrive; i++)
                       *(dk_mspw + i) = (*(wpms + i) == 0)? 0.0:
                                        (float) 1.0 / *(wpms + i);
               free(wpms);
       }
       dr_name = (char **)calloc(dk_ndrive, sizeof (char *));
       dk_select = (int *)calloc(dk_ndrive, sizeof (int));
       for (cp = buf, i = 0; i < dk_ndrive; i++) {
               dr_name[i] = cp;
               sprintf(dr_name[i], "dk%d", i);
               cp += strlen(dr_name[i]) + 1;
               if (dk_mspw[i] != 0.0)
                       dk_select[i] = 1;
       }
       if (!read_names()) {
               free(dr_name);
               free(dk_select);
               free(dk_mspw);
               return(0);
       }
       once = 1;
       return(1);
}

int
dkcmd(cmd, args)
       char *cmd, *args;
{
       if (prefix(cmd, "display") || prefix(cmd, "add")) {
               dkselect(args, 1, dk_select);
               return (1);
       }
       if (prefix(cmd, "ignore") || prefix(cmd, "delete")) {
               dkselect(args, 0, dk_select);
               return (1);
       }
       if (prefix(cmd, "drives")) {
               register int i;

               move(CMDLINE, 0); clrtoeol();
               for (i = 0; i < dk_ndrive; i++)
                       if (dk_mspw[i] != 0.0)
                               printw("%s ", dr_name[i]);
               return (1);
       }
       return (0);
}

static void
dkselect(args, truefalse, selections)
       char *args;
       int truefalse, selections[];
{
       register char *cp;
       register int i;
       char *index();

       cp = index(args, '\n');
       if (cp)
               *cp = '\0';
       for (;;) {
               for (cp = args; *cp && isspace(*cp); cp++)
                       ;
               args = cp;
               for (; *cp && !isspace(*cp); cp++)
                       ;
               if (*cp)
                       *cp++ = '\0';
               if (cp - args == 0)
                       break;
               for (i = 0; i < dk_ndrive; i++)
                       if (strcmp(args, dr_name[i]) == 0) {
                               if (dk_mspw[i] != 0.0)
                                       selections[i] = truefalse;
                               else
                                       error("%s: drive not configured",
                                           dr_name[i]);
                               break;
                       }
               if (i >= dk_ndrive)
                       error("%s: unknown drive", args);
               args = cp;
       }
}