FTP bash script

Question

我想创建一个脚本来上传文件，直到上传成功。该脚本将监视日志文件。如果"未连接"到服务器，我想重复上传操作，直到"连接"和"文件成功传输"任何人都可以帮助我构建正确的。如果 egrep "不是..."，我应该写什么？

 LOGFILE=/home/transfer_logs/$a.log
 First=$(egrep "Connected" $LOGFILE)
 Second=$(egrep "File successfully transferred" $LOGFILE)
  ftp -p -v -i 192.163.3.3 < ../../example.script > ../../$LOGFILE 2>&1
  if
  egrep "Not connected" $LOGFILE; then
  ftp -p -v -i 192.163.3.3 < ../../example.script > ../../$LOGFILE 2>&1
  until
  [[ -n "$first" ]] && [[ -n "$second" ]]; 
  done
  fi

示例包含：

  binary
  mput a.txt
  quit 

Answer 1

while :; do
    ftp ... > $LOGFILE
    grep -qF Connected $LOGFILE && 
    grep -qF "File successfully transferred" $LOGFILE && break
done