examples/zyg.sh

   1 #!/bin/sh
   2 # Run z-machine interpreter, allowing the user to save their game in a
   3 # directory specific to their client cert.
   4
   5 var=/var/gemini/zyg/
   6
   7 [ -n "$TLS_CLIENT_HASH" ] || exit 1
   8
   9 echo "Choose your poison:"
  10 ls -1 "$var/games/"
  11
  12 while read input; do
  13     sanitised="$(tr -dc [:alnum:]_ <<< "$input")"
  14     gamefile="$var/games/$sanitised"
  15     if [ -n "$sanitised" ] && [ -e "$gamefile" ]; then
  16         break;
  17     fi
  18     echo "Please enter one of the listed games"
  19 done
  20
  21 echo "Starting $sanitised. Savefiles will be preserved."
  22 echo
  23
  24 savesdir="$var/$TLS_CLIENT_HASH/$sanitised"
  25
  26 mkdir -p "$savesdir" || exit 1
  27 cd "$savesdir" || exit 1
  28
  29 # Impose some limits to reduce potential for abuse
  30 ulimit -t 1200
  31 ulimit -f 5000
  32 ulimit -v 20000
  33
  34 # using the z-machine interpreter infuse, which has a nice stdio interface:
  35 # https://gitlab.com/monkeymind/infuse
  36 stdbuf -i0 -o0 infuse "$gamefile"
  37
  38 # Previous attempt: using dfrotz, but it has some problems.
  39 #dfrotz -m -Z0 -R. "$gamefile"