ssh_exec.sh

#!/bin/bash

# This script executes a remote command over SSH, captures its standard output and error output,
# and returns the results along with the exit status of the command.

# Execute from another script and return variables
# Usage: source <(./ssh_exec.sh <ssh_options> <remote_command>)
# Then access the variables:
# $SSHSTATUS
# $RETURNSTATUS
# $RETURNSTDOUT
# $RETURNERROUT

# Define the usage function
usage() {
    echo "Usage: $0 <ssh_options> <remote_command>"
    echo "Note: The remote command must be enclosed in single or double quotes."
    exit 1
}

# Check the arguments
if [ "$#" -lt 2 ]; then
    usage
fi

# Separate SSH options and the remote command
REMOTE_COMMAND="${!#}"
SSH_OPTIONS=("${@:1:$#-1}")

# Debug: Check SSH options and remote command
# echo "SSH_OPTIONS: ${SSH_OPTIONS[@]}"
# echo "REMOTE_COMMAND: $REMOTE_COMMAND"

# Execute the SSH command and capture the output
OUTPUT=$(ssh "${SSH_OPTIONS[@]}" "bash -c \"
  {
    {
      $REMOTE_COMMAND
      echo __RET=\\\$?
    } 2> >(awk '{print \\\"__STDERR__\\\" \\\$0}') | awk '{print \\\"__STDOUT__\\\" \\\$0}'
  }\" 2>&1")
SSHSTATUS=$?

# Debug: Check the output of the SSH command
# echo "OUTPUT: $OUTPUT"

# Parse the remote command's exit status
RETURNSTATUS=$(echo "$OUTPUT" | grep "^__STDOUT____RET=" | sed 's/^__STDOUT____RET=//')

# Parse standard output and error output
RETURNSTDOUT=$(echo "$OUTPUT" | grep -v -E "^__STDOUT____STDERR__|^__STDOUT____RET=" | grep "^__STDOUT__" | sed 's/^__STDOUT__//')
RETURNERROUT=$(echo "$OUTPUT" | grep "^__STDOUT____STDERR__" | sed 's/^__STDOUT____STDERR__//')

# Output variables (for debug purposes)
# echo "SSHSTATUS: $SSHSTATUS"
# echo "RETURNSTATUS: $RETURNSTATUS"
# echo -e "RETURNSTDOUT:\n$RETURNSTDOUT"
# echo -e "RETURNERROUT:\n$RETURNERROUT"

echo SSHSTATUS=$SSHSTATUS
echo RETURNSTATUS=$RETURNSTATUS
echo -n RETURNSTDOUT='"'
echo -n "$RETURNSTDOUT"
echo '"'
echo -n RETURNERROUT='"'
echo -n "$RETURNERROUT"
echo '"'

exit 0