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Annotation of researchv9/cmd/compress/usermem, revision 1.1.1.1

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

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