contrib/top/getans

   1 #!/bin/sh
   2 # getans prompt type default  results_filename
   3 #  type is one of
   4 #   number
   5 #   integer
   6 #   neginteger
   7 #   file    default=default filename
   8 #   path
   9 #   yesno   default=0,1 corres yes or no
  10 #   string (default)
  11
  12 RAWPMPT=$1
  13 TYP=$2
  14 DFLT=$3
  15 OFNM=$4
  16
  17 ny0="no"; ny1="yes"
  18 if [ ${TYP} = "yesno" ]; then
  19     eval ny=\$ny${DFLT}
  20     pmpt="${RAWPMPT} [$ny]: "
  21 else
  22     if [ -z "${DFLT}" ]; then
  23         pmpt="${RAWPMPT}"
  24     else
  25         pmpt="${RAWPMPT} [${DFLT}]: "
  26     fi
  27 fi
  28 if [ x"`echo -n`" = x-n ]
  29 then
  30     c=\\c
  31 else
  32     n=-n
  33 fi
  34
  35 while :
  36 do
  37     echo $n "$pmpt"$c
  38     read input
  39     case "$TYP" in
  40     number)
  41         tmp=`echo $input | tr -d 0123456789.`
  42         if [ -n "$tmp" ]; then
  43             echo "Invalid number.  Please try again."
  44             continue
  45         fi
  46         ;;
  47
  48     integer)
  49         tmp=`echo $input | tr -d 0123456789`
  50         if [ -n "$tmp" ]; then
  51             echo "Invalid integer.  Please try again."
  52             continue
  53         fi
  54         ;;
  55
  56     neginteger)
  57         if [ "x$input" != "x-1" ]; then
  58             tmp=`echo $input | tr -d 0123456789`
  59             if [ -n "$tmp" ]; then
  60                 echo "Invalid integer.  Please try again."
  61                 continue
  62             fi
  63         fi
  64         ;;
  65
  66     file)
  67         if [ -z "$input" ]; then
  68             input=${DFLT}
  69         fi
  70         if [ ! -f "$input"  -a ! -d "$input" ]; then
  71             echo "The file $input does not exist.  Please try again."
  72             continue
  73         fi
  74         ;;
  75
  76     path)
  77         if [ -z "$input" ];  then
  78             input="${DFLT}"
  79         fi
  80         if [ ! -f "$input" ]; then
  81             path=`echo $PATH | sed -e s'/::/ . /g' -e 's/:/ /g'`
  82             x=
  83             for elt in $path;  do
  84                 if [ -f "$elt/$input" ]; then  x=1; break; fi
  85             done
  86             if [ -z "$x" ] ;then
  87                 echo "The command $input was not found.  Please try again."
  88                 continue
  89             fi
  90         fi
  91         ;;
  92
  93     yesno)
  94         if [ -z "$input" ];  then
  95             input="${DFLT}"
  96         else
  97             case $input in
  98             y | yes)
  99                 input=1 ;;
 100             n | no)
 101                 input=0 ;;
 102             *)
 103                 echo 'Please answer "yes" or "no".'
 104                 continue ;;
 105             esac
 106         fi
 107         ;;
 108
 109     *)  ;;
 110     esac
 111     break
 112 done
 113
 114 if [ -z "$input" ]; then
 115     input="${DFLT}"
 116 fi
 117
 118 echo $input > ${OFNM}