Bash 脚本在 SFTP 下载期间终止

Question

I have a problem with this script:

#!/bin/bash

data="$(date +\%Y\%m\%d)"

PASSW="pippo"

comando0="cd /remote/path"
comando1="get -r bak*"

cd /local/path
mkdir $data

cd /local/path/$data

(/usr/bin/expect -c "
spawn /usr/bin/sftp user@ip

expect \"Password:\"
send \"$PASSW\r\"

expect \"sftp>\"
send \"$comando0\r\"

expect \"sftp>\"
send \"$comando1\r\"

expect \"sftp>\" 
send "bye\r"

expect \"sftp>\"
send \"exit\r\"
")

On the reomte server there are hundreds of directories called bak*. I need to download these directories and their contents on my local PC. If I connect manually on the remote server and do "get -r bak*" , it works fine. After almost two hours I have all the directories on my PC, while if I use the bash script, this is termintaed after 1 or 2 minutes.

Could you help me ?

Thanks

Answer 1

Expect has a default 10-second timeout in the expect request, so if get -r bak* takes hours it will exceed this timeout.

There's no need to use Expect for this. Just feed all the commands to sftp using a here-document.

/usr/bin/sftp user@ip <<EOF
$PASSW
$comando0
$comando1
bye
exit
EOF

Answer 2

I've modified the script in this way:

#!/bin/bash

data="$(date +\%Y\%m\%d)"
PASSW="pippo"
comando0="cd /remote/path"
comando1="get -r bak*"

cd /local/path
mkdir $data
cd /local/path/$data

/usr/bin/sftp user@ip <<EOF
$PASSW
$comando0
$comando1
bye
exit
EOF