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1 : This shell script snoops around to find the maximum amount of available
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2 : user memory. These variables need to be set only if there is no
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3 : /usr/adm/messages. KMEM, UNIX, and CLICKSIZE can be set on the command
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4 : line, if desired, e.g. UNIX=/unix
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5 KMEM=/dev/kmem # User needs read access to KMEM
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6 UNIX=
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7 # VAX CLICKSIZE=512, UNIX=/vmunix
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8 # PDP-11 CLICKSIZE=64, UNIX=/unix
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9 # CADLINC 68000 CLICKSIZE=4096, UNIX=/unix
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10 # Perkin-Elmer 3205 CLICKSIZE=4096, UNIX=/edition7
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11 # Perkin-Elmer all others, CLICKSIZE=2048, UNIX=/edition7
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12 CLICKSIZE=512
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13 eval $*
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14
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15 SIZE=0
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16 if test -r /usr/adm/messages # probably the most transportable
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17 then
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18 SIZE=`grep avail /usr/adm/messages | sed -n '$s/.*[ ]//p'`
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19 fi
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20
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21 if test 0$SIZE -le 0 # no SIZE in /usr/adm/messages
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22 then
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23 if test -r $KMEM # Readable KMEM
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24 then
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25 if test -n "$UNIX"
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26 then
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27 : User must have specified it already.
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28 elif test -r /vmunix
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29 then
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30 UNIX=/vmunix
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31 CLICKSIZE=512 # Probably VAX
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32 elif test -r /edition7
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33 then
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34 UNIX=/edition7
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35 CLICKSIZE=2048 # Perkin-Elmer: change to 4096 on a 3205
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36 elif test -r /unix
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37 then
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38 UNIX=/unix # Could be anything
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39 fi
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40 if test -n "$UNIX"
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41 then
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42 SIZE=`echo maxmem/D | adb $UNIX $KMEM | sed -n '$s/.*[ ]//p'`
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43 if test 0$SIZE -le 0
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44 then
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45 SIZE=`echo physmem/D | adb $UNIX $KMEM | sed -n '$s/.*[ ]//p'`
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46 fi
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47 SIZE=`expr 0$SIZE '*' $CLICKSIZE`
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48 fi
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49 fi
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50 fi
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51
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52 case $UNIX in
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53 /vmunix) # Assume 4.2bsd: check for resource limits
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54 MAXSIZE=`csh -c limit | awk 'BEGIN { MAXSIZE = 1000000 }
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55 /datasize|memoryuse/ && NF == 3 { if ($2 < MAXSIZE) MAXSIZE = $2 }
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56 END { print MAXSIZE * 1000 }'`
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57 if test $MAXSIZE -lt $SIZE
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58 then
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59 SIZE=$MAXSIZE
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60 fi
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61 ;;
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62 esac
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63
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64 if test 0$SIZE -le 0
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65 then
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66 echo 0;exit 1
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67 else
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68 echo $SIZE
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69 fi
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