While loop in bash script execute only once [duplicate] - bash

Question

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bash cycle breaks when calling ssh command in the loop
(2 answers)
Closed 3 months ago.
I have a given shell script:
#!/bin/bash
USERNAME=xenobot
SSH_KEY_LOCATION="~/.ssh/id_rsa"
FILE="server.info"
while read -r server_ip package_type; do
if [[ $package_type == "deb" ]]; then
echo "For $server_ip package type is $package_type"
DPKG_FILE_PATH=$(ls ./src/dpkg/dpkg-*)
DPKG_FILE=$(basename $DPKG_FILE_PATH)
echo "$DPKG_FILE located at $DPKG_FILE_PATH will be transfered via SSH to server"
scp ./src/dpkg/${DPKG_FILE} $USERNAME#$server_ip:/tmp
ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -l ${USERNAME} ${server_ip} "cd /tmp; sudo dpkg -i *.deb"
elif [[ $package_type == "rpm" ]]; then
echo "For $server_ip package type is $package_type"
RPM_FILE_PATH=$(ls ./src/rpm/rpm-*)
RPM_FILE=$(basename $RPM_FILE_PATH)
echo "$RPM_FILE located at $RPM_FILE_PATH will be transfered via SSH to server"
scp -o 'StrictHostKeyChecking no' ./src/rpm/${RPM_FILE} $USERNAME#$server_ip:/tmp
echo "$RPM_FILE has been successfuly transfered to server!"
ssh -o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no -l ${USERNAME} ${server_ip} "cd /tmp; sudo rpm -ivh --force $RPM_FILE"
fi
done <"$FILE"
And I have following file server.info, from which previous shell script reads:
213.136.80.123 rpm 213.136.91.102 rpm
The problem with it, as it is execute only once from first line, and just stops there without executing the second line
I have tried just to print output from this server.info using the same while read -r and it seems that outputs just fine like this
#!/bin/bash
USERNAME=xenobot
SSH_KEY_LOCATION="~/.ssh/id_rsa"
FILE="server.info"
while read -r server_ip package_type; do
if [[ $package_type == "deb" ]]; then
echo "For $server_ip package type is $package_type"
elif [[ $package_type == "rpm" ]]; then
echo "For $server_ip package type is $package_type"
fi
done <"$FILE"
Output:
213.136.80.123 rpm 213.136.91.102 rpm
So it seems like it outputs two separate lines, however I do not know why it runs script only once in bigger example

Answer 1

Try using a different file descriptor for your list other than 0, 1, or 2 (in this case it's set to 3).
while read -r server_ip package_type <&3; do
...
done 3<"$FILE"
If that works, then what's going on here is that ssh -- being an interactive program -- is sucking up your STDIN input.