4.3BSD - /usr/src/ucb/systat/disks.c

   1: /*
   2:  * Copyright (c) 1980 Regents of the University of California.
   3:  * All rights reserved.  The Berkeley software License Agreement
   4:  * specifies the terms and conditions for redistribution.
   5:  */
   6: 
   7: #ifndef lint
   8: static char sccsid[] = "@(#)disks.c	5.2 (Berkeley) 12/11/85";
   9: #endif not lint
  10: 
  11: #include "systat.h"
  12: #include <sys/buf.h>
  13: #include <ctype.h>
  14: 
  15: static struct nlist nlst[] = {
  16: #define X_DK_NDRIVE 0
  17:     { "_dk_ndrive" },
  18: #define X_DK_MSPW   1
  19:     { "_dk_mspw" },
  20: #ifdef vax
  21: #define X_MBDINIT   2
  22:     { "_mbdinit" },
  23: #define X_UBDINIT   3
  24:     { "_ubdinit" },
  25: #endif
  26: #ifdef sun
  27: #define X_MBDINIT   2
  28:     { "_mbdinit" },
  29: #endif
  30:     { "" },
  31: };
  32: 
  33: dkinit()
  34: {
  35:     register int i;
  36:     register char *cp;
  37:     static int once = 0;
  38:     static char buf[1024];
  39: 
  40:     if (once)
  41:         return(1);
  42:     nlist("/vmunix", nlst);
  43:     if (nlst[X_DK_NDRIVE].n_value == 0) {
  44:         error("dk_ndrive undefined in kernel");
  45:         return(0);
  46:     }
  47:     dk_ndrive = getw(nlst[X_DK_NDRIVE].n_value);
  48:     if (dk_ndrive <= 0) {
  49:         error("dk_ndrive=%d according to /vmunix", dk_ndrive);
  50:         return(0);
  51:     }
  52:     dk_mspw = (float *)calloc(dk_ndrive, sizeof (float));
  53:     lseek(kmem, nlst[X_DK_MSPW].n_value, L_SET);
  54:     read(kmem, dk_mspw, dk_ndrive * sizeof (float));
  55:     dr_name = (char **)calloc(dk_ndrive, sizeof (char *));
  56:     dk_select = (int *)calloc(dk_ndrive, sizeof (int));
  57:     for (cp = buf, i = 0; i < dk_ndrive; i++) {
  58:         dr_name[i] = cp;
  59:         sprintf(dr_name[i], "dk%d", i);
  60:         cp += strlen(dr_name[i]) + 1;
  61:         if (dk_mspw[i] != 0.0)
  62:             dk_select[i] = 1;
  63:     }
  64:     if (! read_names()) {
  65:         free(dr_name);
  66:         free(dk_select);
  67:         free(dk_mspw);
  68:         return(0);
  69:     }
  70:     once = 1;
  71:     return(1);
  72: }
  73: 
  74: dkcmd(cmd, args)
  75:     char *cmd, *args;
  76: {
  77: 
  78:         if (prefix(cmd, "display") || prefix(cmd, "add")) {
  79:                 dkselect(args, 1, dk_select);
  80:         return (1);
  81:         }
  82:         if (prefix(cmd, "ignore") || prefix(cmd, "delete")) {
  83:                 dkselect(args, 0, dk_select);
  84:         return (1);
  85:         }
  86:         if (prefix(cmd, "drives")) {
  87:         register int i;
  88: 
  89:                 move(CMDLINE, 0); clrtoeol();
  90:                 for (i = 0; i < dk_ndrive; i++)
  91:                         if (dk_mspw[i] != 0.0)
  92:                                 printw("%s ", dr_name[i]);
  93:                 return (1);
  94:         }
  95:     return (0);
  96: }
  97: 
  98: #define steal(where, var) \
  99:     lseek(kmem, where, L_SET); read(kmem, &var, sizeof var);
 100: 
 101: #ifdef vax
 102: #include <vaxuba/ubavar.h>
 103: #include <vaxmba/mbavar.h>
 104: 
 105: read_names()
 106: {
 107:     struct mba_device mdev;
 108:     struct mba_driver mdrv;
 109:     short two_char;
 110:     char *cp = (char *)&two_char;
 111:     struct uba_device udev;
 112:     struct uba_driver udrv;
 113:     register struct mba_device *mp;
 114:     register struct uba_device *up;
 115: 
 116:     mp = (struct mba_device *)nlst[X_MBDINIT].n_value;
 117:     up = (struct uba_device *)nlst[X_UBDINIT].n_value;
 118:     if (mp == 0 && up == 0) {
 119:         error("Disk init info not in namelist\n");
 120:         return(0);
 121:     }
 122:     if (mp) for (;;) {
 123:         steal(mp++, mdev);
 124:         if (mdev.mi_driver == 0)
 125:             break;
 126:         if (mdev.mi_dk < 0 || mdev.mi_alive == 0)
 127:             continue;
 128:         steal(mdev.mi_driver, mdrv);
 129:         steal(mdrv.md_dname, two_char);
 130:         sprintf(dr_name[mdev.mi_dk], "%c%c%d",
 131:             cp[0], cp[1], mdev.mi_unit);
 132:     }
 133:     if (up) for (;;) {
 134:         steal(up++, udev);
 135:         if (udev.ui_driver == 0)
 136:             break;
 137:         if (udev.ui_dk < 0 || udev.ui_alive == 0)
 138:             continue;
 139:         steal(udev.ui_driver, udrv);
 140:         steal(udrv.ud_dname, two_char);
 141:         sprintf(dr_name[udev.ui_dk], "%c%c%d",
 142:             cp[0], cp[1], udev.ui_unit);
 143:     }
 144:     return(1);
 145: }
 146: #endif
 147: 
 148: #ifdef sun
 149: #include <sundev/mbvar.h>
 150: 
 151: read_names()
 152: {
 153:     static int once = 0;
 154:     struct mb_device mdev;
 155:     struct mb_driver mdrv;
 156:     short two_char;
 157:     char *cp = (char *) &two_char;
 158:     register struct mb_device *mp;
 159: 
 160:     mp = (struct mb_device *)nlst[X_MBDINIT].n_value;
 161:     if (mp == 0) {
 162:         error("Disk init info not in namelist\n");
 163:         return(0);
 164:     }
 165:     for (;;) {
 166:         steal(mp++, mdev);
 167:         if (mdev.md_driver == 0)
 168:             break;
 169:         if (mdev.md_dk < 0 || mdev.md_alive == 0)
 170:             continue;
 171:         steal(mdev.md_driver, mdrv);
 172:         steal(mdrv.mdr_dname, two_char);
 173:         sprintf(dr_name[mdev.md_dk], "%c%c%d",
 174:             cp[0], cp[1], mdev.md_unit);
 175:     }
 176:     return(1);
 177: }
 178: #endif
 179: 
 180: dkselect(args, truefalse, selections)
 181:     char *args;
 182:     int truefalse, selections[];
 183: {
 184:     register char *cp;
 185:     register int i;
 186:     char *index();
 187: 
 188:     cp = index(args, '\n');
 189:     if (cp)
 190:         *cp = '\0';
 191:     for (;;) {
 192:         for (cp = args; *cp && isspace(*cp); cp++)
 193:             ;
 194:         args = cp;
 195:         for (; *cp && !isspace(*cp); cp++)
 196:             ;
 197:         if (*cp)
 198:             *cp++ = '\0';
 199:         if (cp - args == 0)
 200:             break;
 201:         for (i = 0; i < dk_ndrive; i++)
 202:             if (strcmp(args, dr_name[i]) == 0) {
 203:                 if (dk_mspw[i] != 0.0)
 204:                     selections[i] = truefalse;
 205:                 else
 206:                     error("%s: drive not configured",
 207:                         dr_name[i]);
 208:                 break;
 209:             }
 210:         if (i >= dk_ndrive)
 211:             error("%s: unknown drive", args);
 212:         args = cp;
 213:     }
 214: }

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