File: 03exitcodes

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tinyssh 20250501-2
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#!/bin/sh
# 20181027
# Jan Mojzis
# Public domain.


# change directory to $AUTOPKGTEST_TMP
cd "${AUTOPKGTEST_TMP}"

# we need tools from /usr/sbin
PATH="/usr/sbin:${PATH}"
export PATH

# backup ~/.ssh
rm -rf ~/.ssh.tinysshtest.bk
[ -d ~/.ssh ] && mv ~/.ssh ~/.ssh.tinysshtest.bk
mkdir -p ~/.ssh
chmod 700 ~/.ssh

# run tinysshd on port 10000
rm -rf sshkeydir
tinysshd-makekey -q sshkeydir
tcpserver -HRDl0 127.0.0.1 10000 tinysshd -- sshkeydir 2>tinysshd.log &
tcpserverpid=$!
# Give some extra time for tcpserver to start,
# to avoid flaky test failures on slower testbeds
sleep 1

cleanup() {
  ex=$?
  #kill tcpserver
  kill -TERM "${tcpserverpid}" 1>/dev/null 2>/dev/null || :
  kill -KILL "${tcpserverpid}" 1>/dev/null 2>/dev/null || :
  if [ ${ex} -gt 0 ]; then
    (
      echo "homedir:"
      ls -ld ~ ~/.ssh
      echo "tinysshd.log:"
      cat tinysshd.log
    ) >&2
  fi
  rm -rf ~/.ssh sshkeydir tinysshd.log ssh.log
  [ -d ~/.ssh.tinysshtest.bk ] && mv ~/.ssh.tinysshtest.bk ~/.ssh
  exit "${ex}"
}
trap "cleanup" EXIT TERM INT

# add server key to the known_hosts
ssh-keyscan -t ed25519 -H -p 10000 127.0.0.1 2>/dev/null > ~/.ssh/known_hosts

# try login without authorization key
# must fail
ssh -p 10000 127.0.0.1 'exit 0' >ssh.log 2>&1
exitcode=$?
if [ x"${exitcode}" = x0 ]; then
  echo "ssh 127.0.0.1:10000 login without authorization key with exit status 0, too bad" >&2
  cat ssh.log >&2
  exit 2
else
  echo "ssh 127.0.0.1:10000 login without authorization key failed, this is ok:"
fi

# create authorization keys
ssh-keygen -t ed25519 -q -N '' -f ~/.ssh/id_ed25519 || exit 10
cp -pr ~/.ssh/id_ed25519.pub ~/.ssh/authorized_keys || exit 11

# runs remote command which exits with exit status 0 - 255
# and tests if tinyssh server sends the status do the client
for code in `seq 0 255`; do
  ssh -p 10000 127.0.0.1 "exit ${code}"
  exitcode=$?
  if [ x"${exitcode}" != x"${code}" ]; then
    echo "ssh 127.0.0.1:10000 "'"'"exit ${code}"'"'" failed: tinyssd exited with exit code: ${exitcode}" >&2
    exit 3
  else
    echo "ssh 127.0.0.1:10000 "'"'"exit ${code}"'"'" works"
  fi
done

# runs command which is killed by signal 9 and 15
# and tests if tinyssh server sends the status do the client
for signal in 9 15 ; do
  ssh -p 10000 127.0.0.1 "kill -${signal} \$\$"
  exitcode=$?
  if [ x"${exitcode}" != x255 ]; then
    echo "ssh 127.0.0.1:10000 "'"'"kill -${signal} "'$$"'" failed: tinyssd exited with exit code: ${exitcode}" >&2
    exit 4
  else
    echo "ssh 127.0.0.1:10000 "'"'"kill -${signal} "'$$"'" works"
  fi
done

exit 0