script for testing Syncthing issue #7924

test_chmod_bug.sh

#!/bin/bash
set -e

# this script starts two ST instances, connects them, adds a shared folder,
# syncs a file, chmods it, and checks that the new permissions are synced
# within a reasonable time frame.

# Set to your local ST build
SYNCTHING=../bin/syncthing


API_KEY=test-xxx

syncthing_cli() {
  port=$1; shift
  $SYNCTHING cli --gui-address="localhost:$port" --gui-apikey="$API_KEY" "$@"
}

syncthing_serve() {
  home_dir=$1
  port=$2
  rm -rf "${home_dir}"

  $SYNCTHING serve \
    --home="$home_dir" \
    --no-upgrade \
    --no-default-folder \
    --gui-address="http://localhost:$port" \
    --gui-apikey=$API_KEY \
    --no-browser \
    --no-restart &

}

echo "Starting instances"
FOO_PORT=8183
BAR_PORT=8184
syncthing_serve ./foo-home $FOO_PORT >/dev/null
syncthing_serve ./bar-home $BAR_PORT >/dev/null
trap "echo 'killing instances'; syncthing_cli $FOO_PORT operations shutdown; syncthing_cli $BAR_PORT operations shutdown" EXIT SIGINT SIGTERM ERR
sleep 3

foo_id=$(syncthing_cli $FOO_PORT show system | jq -r '.myID')
bar_id=$(syncthing_cli $BAR_PORT show system | jq -r '.myID')

make_device() {
    name=$1; shift;
    port=$1; shift;
    id=$(syncthing_cli "$port" show system | jq -r '.myID')
    addrs=$(syncthing_cli "$port" show system | jq -r '.connectionServiceStatus|to_entries[]|select(.key|startswith("tcp:")).value.lanAddresses')

    cat <<EOF
      {
    "deviceID": "$id",
    "name": "$name",
    "addresses": $addrs,
    "autoAcceptFolders": true
  }
EOF
}

echo "connecting"

syncthing_cli $FOO_PORT config devices add-json "$(make_device bar $BAR_PORT)"
syncthing_cli $BAR_PORT config devices add-json "$(make_device foo $FOO_PORT)"

echo "adding folders"
test_foo=$(pwd)/test_foo
test_bar=$(pwd)/test_bar
rm -rf "$test_foo" "$test_bar"

make_folder() {
    name=$1; shift
    path=$1; shift
    remote=$1; shift
    cat <<EOF
    {
  "id": "$name",
  "label": "$name",
  "path": "$path",
  "filesystemType": "basic",
  "type": "sendreceive",
  "devices": [
    {
      "deviceID": "$remote"
    }
  ],
  "fsWatcherEnabled": true,
  "fsWatcherDelayS": 1
}
EOF
}

syncthing_cli $FOO_PORT config folders add-json "$(make_folder test "$test_foo" "$bar_id")"
syncthing_cli $BAR_PORT config folders add-json "$(make_folder test "$test_bar" "$foo_id")"

echo "syncing file..."
umask 022
echo hello > "$test_foo/hello.txt"
while ! [[ -f "$test_bar/hello.txt" ]]; do
    sleep 1
done


echo "changing permissions"
chmod 777 "$test_foo/hello.txt"
stat -f '%N: %p' "$test_foo/hello.txt" "$test_bar/hello.txt"
echo "waiting a few seconds to allow sync"
sleep 10
stat -f '%N: %p' "$test_foo/hello.txt" "$test_bar/hello.txt"
diff <(stat -f '%p' "$test_foo/hello.txt") <(stat -f '%p' "$test_bar/hello.txt") && echo success || echo fail

successful output:

Starting instances
connecting
adding folders
syncing file...
changing permissions
test_foo/hello.txt: 100777
test_bar/hello.txt: 100644
waiting a few seconds to allow sync
test_foo/hello.txt: 100777
test_bar/hello.txt: 100777
success
killing instances