readline-test.sh

   1 #! /usr/bin/env bash
   2 # source: readline-test.sh
   3 # Copyright Gerhard Rieger and contributors (see file CHANGES)
   4 # Published under the GNU General Public License V.2, see file COPYING
   5
   6 # script that simulates a simple program with authentication.
   7 # is just for testing the readline features
   8 # perform the test with something like:
   9 # ./socat readline,history=$HOME/.history,noecho='^Password: ' system:./readline-test.sh,pty,setsid,ctty,stderr,sigint,sigquit,echo=0,raw
  10
  11
  12 BANNER='readline feature test program'
  13 USERPROMPT='Authentication required\nUsername: '
  14 PWDPROMPT='Password: '
  15 PROMPT='prog> '
  16
  17 # degenerated user database
  18 CREDUSER="user"
  19 CREDPASS="password"
  20
  21 if   [ $(echo "x\c") = "x" ]; then ECHO="echo"
  22 elif [ $(echo -e "x\c") = "x" ]; then ECHO="echo -e"
  23 fi
  24
  25 #trap "$ECHO $0 got SIGINT"  INT
  26 trap "$ECHO $0 got SIGINT"  INT
  27 trap "$ECHO $0 got SIGQUIT" QUIT
  28
  29 # print banner
  30 $ECHO "$BANNER"
  31
  32 # on (some) ksh read -p does not mean prompt
  33 $ECHO "$USERPROMPT\c"; read -r USERNAME
  34 $ECHO "$PWDPROMPT\c"; read -rs PASSWORD
  35 $ECHO
  36
  37 if [ "$USERNAME" != "$CREDUSER" -o "$PASSWORD" != "$CREDPASS" ]; then
  38     $ECHO "Authentication failed" >&2
  39     exit -1
  40 fi
  41
  42 while $ECHO "$PROMPT\c"; read -r COMMAND; do
  43     if [ "$COMMAND" = "exit" ]; then
  44         break;
  45     fi
  46     $ECHO "executing $COMMAND"
  47 done